WO2023050656A1 - Method and apparatus for controlling series-parallel switching circuit, and controller and storage medium - Google Patents

Method and apparatus for controlling series-parallel switching circuit, and controller and storage medium Download PDF

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Publication number
WO2023050656A1
WO2023050656A1 PCT/CN2022/071864 CN2022071864W WO2023050656A1 WO 2023050656 A1 WO2023050656 A1 WO 2023050656A1 CN 2022071864 W CN2022071864 W CN 2022071864W WO 2023050656 A1 WO2023050656 A1 WO 2023050656A1
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Prior art keywords
moment
output
state
circuit control
timing diagram
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PCT/CN2022/071864
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French (fr)
Chinese (zh)
Inventor
范杨平
吕剑
孙利辉
周强
袁庆民
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西安领充创享新能源科技有限公司
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Publication of WO2023050656A1 publication Critical patent/WO2023050656A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter

Definitions

  • the present application relates to the technical field of power electronics, in particular, to a control method, device, controller and storage medium for a series-parallel switching circuit.
  • the series-parallel switching circuit uses switches or contactors to connect two independent DC output modules in series or in parallel. Based on this series-parallel switching circuit, the charging system can be expanded to meet the charging power requirements of different loads.
  • DC output series-parallel switching involves switching between two or more outputs.
  • the output voltages of at least two DC output units are respectively turned off, but due to the existence of output capacitors, the output voltage does not It will be directly reduced to zero, and the residual voltage cannot be guaranteed to be absolutely equal, and at the moment of switching to parallel connection, the two DC output capacitors are directly short-circuited, and the current impact generated by the voltage difference can easily cause damage to the switching device.
  • This application provides a series-parallel switching circuit control method, device, controller and storage medium, so that online series-parallel switching can be realized without stopping the machine, and the output voltage or output current is stable and controllable, effectively solving the problems in related technologies.
  • the interruption of output power during series-parallel switching leads to the problem that normal charging cannot be performed, thereby meeting the normal charging requirements of different loads.
  • Some embodiments of the present application provide a method for controlling a series-parallel switching circuit, which is applied to a controller, and the controller is connected to the series-parallel switching circuit.
  • the series-parallel switching circuit may include: at least two DC output units, multiple A state switching unit and a discharge unit, the DC output unit is connected to the output main circuit through the state switching unit, and the discharge unit is connected to the DC output unit; the method may include:
  • circuit control timing diagram is configured to indicate the open or closed state of the state switching unit at at least one moment, and indicate the output of the at least two DC output units The change state of the current and the output voltage at at least one moment;
  • the state of the state switching unit and the output current and output voltage of the at least two DC output units are controlled, and the state of the discharge unit is controlled, so that the at least The two DC output units are switched from the parallel state to the series state, or from the series state to the parallel state.
  • circuit control timing diagram may also be configured to indicate whether the discharge unit is in a discharge state at least at one moment;
  • the controlling the state of the state switching unit and the output current and output voltage of the at least two DC output units according to the circuit control sequence diagram may include:
  • the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of the at least two direct current output units are controlled.
  • controlling the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of the at least two DC output units according to the circuit control timing diagram may include:
  • the state of the state switching unit and the state of the discharge unit are controlled, and the output current and output voltage of the DC output units in each of the DC output unit groups are respectively controlled;
  • the state of the state switching unit and the state of the discharge unit are controlled, and the groups of DC output units are respectively used as DC output units, and the groups of DC output units are respectively used as DC output units.
  • the output current as well as the output voltage are controlled.
  • the state switching unit may include: a first switch, a second switch, and a third switch; the circuit control timing diagram is configured to indicate: the opening or closing of the first switch at at least one moment state, the open or closed state of the second switch at at least one moment, and the open or closed state of the third switch at at least one moment.
  • the at least two DC output units may include: a first DC output unit and a second DC output unit; the circuit control timing diagram is configured to indicate: the output of the first DC output unit The changing state of the current and the output voltage at at least one moment, and the changing state of the output current and the output voltage of the second DC output unit at at least one moment.
  • controlling the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of the two DC output units according to the circuit control timing diagram may include:
  • control the first switch to turn off after the second moment
  • the second switch is controlled to be turned off after the fourth moment or before the sixth moment, and the sixth moment is later than the fourth moment;
  • the discharge unit is controlled to be closed between the third moment and the fourth moment; the fourth moment is later than the third moment;
  • the output current of the second DC output unit is controlled to decrease to zero from the first moment to the second moment, and to remain at zero from the second moment to the fifth moment, and from the From the fifth moment to the sixth moment, it increases to the target current value and remains unchanged from the sixth moment; the sixth moment is later than the fifth moment, and the fifth moment is later than the second time, the second time being later than the first time;
  • the output voltage of the first DC output unit is controlled to decrease to a first target voltage value at the sixth moment to the seventh moment, and the first target voltage value is based on the DC output The number of units is obtained;
  • the output voltage of the second DC output unit is controlled to decrease to zero from the third moment to the fourth moment, and to remain at zero from the fourth moment to the sixth moment , increasing to the first target voltage value from the sixth moment to the seventh moment.
  • controlling the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of the two DC output units according to the circuit control timing diagram may include:
  • the third switch is controlled to be turned off after the second moment or before the fourth moment; the fourth moment is later than the second moment;
  • the discharge unit is controlled to be closed after the second moment and before the third moment; the third moment is later than the second moment;
  • the output current of the second DC output unit is controlled to decrease from the first moment to the second moment to zero, and to remain at zero from the second moment to the fifth moment, from From the fifth moment, it rises to the target current value and remains unchanged;
  • the output voltage of the first DC output unit is controlled to rise to the second target voltage value from the first moment to the second moment, and from the second moment remain unchanged; the second target voltage value is obtained based on the number of DC output units;
  • the output voltage of the second DC output unit is controlled to decrease to zero from the first moment to the second moment, and to remain at zero from the second moment to the fourth moment , increasing to the second target voltage value from the fourth moment to the fifth moment.
  • controlling the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of the two DC output units according to the circuit control timing diagram may further include:
  • the discharge unit is controlled to be closed after the second moment and before the third moment; the third moment is later than the second moment.
  • FIG. 1 A series-parallel switching circuit control device, which is applied to a controller, and the controller is connected to the series-parallel switching circuit, and the series-parallel switching circuit includes: at least two DC output units, A plurality of state switching units and a discharge unit, the DC output unit is connected to the output main circuit through the state switching unit, and the discharge unit is connected to the DC output unit;
  • the device may include: an acquisition module and a control module;
  • the acquisition module is configured to acquire a pre-generated circuit control timing diagram; wherein the circuit control timing diagram is configured to indicate the open or closed state of the state switching unit at least one moment, and indicate the The output current of the at least two DC output units and the change state of the output voltage at at least one moment;
  • the control module is configured to control the state of the state switching unit and the output current and output voltage of the at least two DC output units according to the circuit control timing diagram, and control the output current and output voltage of the discharge unit.
  • the state is controlled to switch the at least two DC output units from a parallel state to a series state, or from the series state to the parallel state.
  • circuit control timing diagram is further configured to indicate whether the discharge unit is in a discharge state at least at one moment;
  • the control module can also be used for:
  • the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of the at least two direct current output units are controlled.
  • control module can also be configured to:
  • the state of the state switching unit and the state of the discharge unit are controlled, and the output current and output voltage of the DC output units in each of the DC output unit groups are respectively controlled;
  • the state of the state switching unit and the state of the discharge unit are controlled, and the groups of DC output units are respectively used as DC output units, and the groups of DC output units are respectively used as DC output units.
  • the output current as well as the output voltage are controlled.
  • the state switching unit may include: a first switch, a second switch, and a third switch; the circuit control timing diagram is configured to indicate: the opening or closing of the first switch at at least one moment state, the open or closed state of the second switch at at least one moment, and the open or closed state of the third switch at at least one moment.
  • the at least two DC output units may include: a first DC output unit and a second DC output unit; the circuit control timing diagram is configured to indicate: the output of the first DC output unit The changing state of the current and the output voltage at at least one moment, and the changing state of the output current and the output voltage of the second DC output unit at at least one moment.
  • control module can also be configured to:
  • control the first switch to turn off after the second moment
  • the second switch is controlled to be turned off after the fourth moment or before the sixth moment, and the sixth moment is later than the fourth moment;
  • the discharge unit is controlled to be closed between the third moment and the fourth moment; the fourth moment is later than the third moment;
  • the output current of the second DC output unit is controlled to decrease to zero from the first moment to the second moment, and to remain at zero from the second moment to the fifth moment, and from the From the fifth moment to the sixth moment, it increases to the target current value and remains unchanged from the sixth moment; the sixth moment is later than the fifth moment, and the fifth moment is later than the second time, the second time being later than the first time;
  • the output voltage of the first DC output unit is controlled to decrease to a first target voltage value at the sixth moment to the seventh moment, and the first target voltage value is based on the DC output The number of units is obtained;
  • the output voltage of the second DC output unit is controlled to decrease to zero from the third moment to the fourth moment, and to remain at zero from the fourth moment to the sixth moment , increasing to the first target voltage value from the sixth moment to the seventh moment.
  • control module can also be configured to:
  • the third switch is controlled to be turned off after the second moment or before the fourth moment; the fourth moment is later than the second moment;
  • the output current of the second DC output unit is controlled to decrease from the first moment to the second moment to zero, and to remain at zero from the second moment to the fifth moment, from From the fifth moment, it rises to the target current value and remains unchanged;
  • the output voltage of the first DC output unit is controlled to rise to the second target voltage value from the first moment to the second moment, and from the second moment remain unchanged; the second target voltage value is obtained based on the number of DC output units;
  • the output voltage of the second DC output unit is controlled to decrease to zero from the first moment to the second moment, and to remain at zero from the second moment to the fourth moment , increasing to the second target voltage value from the fourth moment to the fifth moment.
  • control module can also be configured to:
  • the discharge unit is controlled to be closed after the second moment and before the third moment; the third moment is later than the second moment.
  • Some other embodiments of the present application also provide a controller, which may include: a processor, a storage medium, and a bus, where the storage medium stores machine-readable instructions executable by the processor.
  • the processor communicates with the storage medium through a bus, and the processor executes the machine-readable instructions to execute the steps of the method provided in the embodiment of the first aspect.
  • Another embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is run by a processor, the method as provided in the first aspect embodiment is executed. step.
  • Embodiments of the present application provide a control method, device, controller, and storage medium for a series-parallel switching circuit, which are applied to a controller, and the controller is connected to a series-parallel switching circuit.
  • the series-parallel switching circuit includes: at least two DC output units, multiple A state switching unit and a discharge unit, the DC output unit is connected to the output main circuit through the state switching unit, and the discharge unit is connected to the DC output unit;
  • the method includes: obtaining a pre-generated circuit control timing diagram; wherein, the circuit control timing diagram is configured as It is used to indicate the open or closed state of the state switching unit at least one moment, and indicate the output current and output voltage change state of at least two DC output units at at least one moment; according to the circuit control sequence diagram, the state switching unit The state and the output current and output voltage of at least two DC output units are controlled, and the state of the discharge unit is controlled to switch at least two DC output units from a parallel state to a series state, or from a series state to
  • the controller controls the "state switching unit" to be in the open or closed state at least one moment according to the pre-generated circuit control sequence diagram, and the output current and output voltage of at least two DC output units are at least one moment
  • the voltage or output current is stable and controllable, which effectively solves the problem of abnormal charging caused by output power interruption during series-parallel switching in related technologies, thereby meeting the normal charging needs of different loads.
  • FIG. 1 is a schematic structural diagram of a series-parallel switching circuit provided in an embodiment of the present application
  • FIG. 2 is a schematic structural diagram of another series-parallel switching circuit provided by the embodiment of the present application.
  • FIG. 3 is a structural block diagram of a series-parallel switching circuit control system provided by an embodiment of the present application
  • FIG. 4 is a schematic flowchart of a method for controlling a series-parallel switching circuit provided in an embodiment of the present application
  • FIG. 5 is a schematic flowchart of another method for controlling a series-parallel switching circuit provided in an embodiment of the present application
  • FIG. 6 is a schematic diagram of a circuit control timing diagram in a method for controlling a series-parallel switching circuit provided in an embodiment of the present application;
  • FIG. 7 is a schematic flowchart of another method for controlling a series-parallel switching circuit provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a circuit control timing diagram in another method for controlling a series-parallel switching circuit provided by an embodiment of the present application.
  • FIG. 9 is a schematic flowchart of another method for controlling a series-parallel switching circuit provided in an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a series-parallel switching circuit control device provided in an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a controller provided by an embodiment of the present application.
  • Icons 100-series-parallel switching circuit; 101-DC output unit; 102-state switching unit; 103-discharging unit; 300-series-parallel switching circuit control system; 301-controller; 302-output load.
  • Figure 1 is a schematic structural diagram of a series-parallel switching circuit provided by the embodiment of the present application; as shown in Figure 1, it is a series-parallel switching circuit without an output anti-reverse diode, and the series-parallel switching circuit 100 may include: at least two A DC output unit 101, a plurality of state switching units 102 and a discharge unit 103.
  • the DC output unit 101 is connected to the output main circuit through the state switching unit 102, the output main circuit is used to connect the back-end load, and the state switching unit 102 is used to switch the series or parallel connection state of at least two DC output units 101; the discharge unit 103 Connected with the DC output unit 101, it is used to gradually reduce the voltage across the output capacitor C2 in the DC output unit 101 to zero voltage, which can effectively reduce the current flowing through each switching device in the state switching unit 102 during the series-parallel switching process, and further The switching device is protected, the service life of the switching device is prolonged, and the switching efficiency is accelerated.
  • the series-parallel switching circuit shown in FIG. 1 is briefly introduced as follows.
  • the series-parallel switching circuit shown in FIG. 1 may include two DC output units, namely branch 1 and branch 2, wherein branch 1 and branch 2 are two typical full-bridge LLC power circuit part.
  • branch 1 and branch 2 are two typical full-bridge LLC power circuit part.
  • the primary side in branch 2 can include: input capacitor C3, full-bridge switching network (Q5, Q6, Q7, Q8), resonant network (L1, C4), transformer, and the secondary side package can include : Diode rectification network, sampling resistor (Rsense2), output capacitor C2.
  • branch 1 and branch 2 can adopt three input modes: parallel connection, series connection and independent input, but both branch 1 and branch 2 need to have the functions of independently adjustable output voltage UO and output current IO, otherwise the output power cannot be realized. Switch targets without interruption. Therefore, the output voltage and output current of branch 1 and branch 2 can be output independently, and the amplitude can be adjusted freely within a certain range and time.
  • the state switching unit 102 may include: a first switch S1, a second switch S2, and a third switch S3, wherein the first switch S1 and the second switch S2 are switching switches in a parallel mode, and the first switch S1 and the second switch S2 Relays and diodes can be included, and switching devices such as MOS tubes and IGBTs can also be used directly.
  • the third switch S3 is a switching switch in series mode, which is a one-way switching device, for example, a relay, a switching tube, etc. can be used.
  • the discharge unit 103 may include: a resistor R1 and a discharge switch S4 , the resistor R1 and the discharge switch S4 are a discharge network for the output capacitor C2 of the branch circuit 2 .
  • R1 is a power resistor, a single resistor can be used, or multiple resistors can be combined in series and parallel, and the discharge switch S4 can be a relay or a switch tube.
  • the embodiment of the present application also provides another structure of a series-parallel switching circuit, which is specifically shown in FIG. 2 below.
  • Fig. 2 is a schematic structural diagram of another series-parallel switching circuit provided by the embodiment of the present application; as shown in Fig.
  • the first switch S1 connected in parallel is removed, and the diode D3 is added behind the output capacitor C1, so that the anti-reverse diode scheme can be realized, and the diode D3 is connected in series with the output terminal of branch 1, and it is always on during the switching process state.
  • the series-parallel switching circuit with anti-reverse diodes can also use the series-parallel switching circuit control method provided by the application, which only reduces the control of the closed or disconnected state of the first switch S1, and the state switching unit, the discharge unit, each DC
  • the control mode of the output current and the output voltage of the output unit is unchanged, thereby realizing the switching operation of the series-parallel switching circuit, and realizing the online series-parallel switching without stopping the machine, and ensuring the stable and reliable output voltage Vout or output current Io control, thereby realizing the output power without interruption, and effectively solving the problem in the related art that the interruption of the output power during the series-parallel switching leads to the failure of normal charging.
  • Fig. 3 is a structural block diagram of a series-parallel switching circuit control system provided by the embodiment of the present application; as shown in Fig. 302.
  • the controller 301 is communicatively connected with the series-parallel switching circuit 100, and the controller 301 can be configured to send a plurality of state switching units 102 and discharge units 103 in the series-parallel switching circuit 100 according to a pre-generated circuit control timing diagram.
  • State control open or close
  • signal at at least one moment to switch at least two DC output units 101 from a parallel state to a series state, or switch from a series state to a parallel state to meet the charging of different output loads 302 power requirements.
  • the output load 302 can be an active load or a pure resistance load, and the difference between these two loads is only the control difference between the voltage mode and the current mode.
  • Fig. 4 is a schematic flow chart of a method for controlling a series-parallel switching circuit provided by an embodiment of the present application; the execution body of the method may be the controller shown in Fig. 3 above, and as shown in Fig. 4, the method may include:
  • circuit control timing diagram can be configured to indicate the open or closed state of the state switching unit at at least one moment, and indicate the change state of the output current and output voltage of at least two DC output units at at least one moment.
  • the output currents and output voltages of at least two DC output units in the series-parallel switching circuit can be independently adjusted by the controller.
  • different circuit control sequences are pre-generated according to switching requirements of the series-parallel switching circuit. For example, when it is necessary to switch at least two DC output units in the series-parallel switching circuit from the "parallel state" to the "series state", it is possible to generate and control the open or closed state of the "state switching unit” at at least one moment, and The first circuit control timing diagram of the output current of at least two DC output units and the change state of the output voltage at at least one moment, so that the controller can control the "state switching unit” at a certain moment according to the first circuit control timing diagram.
  • the output current IO and the output voltage UO of at least two DC output units increase, decrease, or remain unchanged at least one moment, and the discharge unit is controlled at a certain moment.
  • Energy release to realize online parallel-to-series switching operation so that online series-parallel switching can be realized without stopping the machine, and the output voltage UO or output current IO is stable and controllable, thereby realizing uninterrupted output power and effectively solving related problems.
  • the output power interruption causes the problem that the normal charging cannot be performed.
  • the state of the state switching unit and the output current and output voltage of at least two DC output units can be controlled according to the pre-generated second circuit control sequence, In order to realize the switching operation of series to parallel connection online, and ensure the output power is not interrupted, thus meeting the normal charging requirements of different loads.
  • the embodiment of the present application provides a method for controlling a series-parallel switching circuit, the method is applied to a controller, wherein the controller is connected to the series-parallel switching circuit, and the series-parallel switching circuit may include: at least two DC output units , a plurality of state switching units and a discharge unit, the DC output unit is connected to the output main circuit through the state switching unit, and the discharge unit is connected to the DC output unit; the method may include: obtaining a pre-generated circuit control sequence diagram; wherein, the circuit control sequence The diagram can be configured to indicate the open or closed state of the state switching unit at at least one moment, and indicate the change state of the output current and output voltage of at least two DC output units at at least one moment; according to the circuit control sequence diagram, for The state of the state switching unit and the output current and output voltage of at least two DC output units are controlled, and the state of the discharge unit is controlled to switch at least two DC output units from a parallel state to a series state, or from a series state
  • the controller controls the "state switching unit" to be in the open or closed state at least one moment according to the pre-generated circuit control sequence diagram, and the output current and output voltage of at least two DC output units are at least one moment
  • the voltage or output current is stable and controllable, which effectively solves the problem of abnormal charging caused by output power interruption during series-parallel switching in related technologies, thereby meeting the normal charging needs of different loads.
  • circuit control timing diagram may also be configured to indicate whether the discharge unit is in a discharge state at least at one moment;
  • controlling the state of the state switching unit and the output current and output voltage of at least two DC output units may include:
  • the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of at least two direct current output units are controlled.
  • the circuit control timing diagram can also be configured to indicate whether the discharge unit is in the discharge state at least at one moment, so as to reduce the impact on the state switching unit during the switching process.
  • the current impact prevents the overcurrent damage of the state switching unit, and at the same time, the efficiency of switching from the parallel state to the series state can be accelerated by setting the discharge unit.
  • Fig. 5 is a schematic flowchart of another series-parallel switching circuit control method provided by the embodiment of the present application. As shown in Fig. 5, the above step S401, according to the circuit control timing diagram, checks the state of the state switching unit, the state of the discharge unit and The output current and output voltage of at least two DC output units are controlled, which may include:
  • At least two DC output units included in the series-parallel switching circuit shown in FIG. The practicability of the series-parallel switching circuit provided by the application.
  • each DC output unit group includes 2 DC output units; or, one DC output unit group includes 1 DC output unit, and the other DC output unit group includes 3 DC output units.
  • the group including one DC output unit may be referred to as a first DC output unit group, and the group including three DC output units may be referred to as a second DC output unit group.
  • the DC output units in each DC output unit group may be switched from a parallel state to a series state, or from a series state to a parallel state.
  • the above four DC output units are connected in parallel and need to be switched from the parallel state to the series state. Therefore, the three DC output units in the second DC output unit group can be switched from the parallel state to the series state first, and then , and then the first DC output unit group includes 1 DC output unit, and "switch to 3 DC output units connected in series" to perform parallel-series switching.
  • the state switching unit and the discharge unit of the first DC output unit group and the second DC output unit group can be controlled, and the output currents of the DC output units in each DC output unit group can be controlled respectively.
  • the output voltage is controlled to switch the DC output units in each DC output unit group from a parallel state to a series state, or from a series state to a parallel state.
  • the first DC output unit group and the second DC output unit group are respectively used as The DC output unit, according to the circuit control timing diagram, controls the state switching unit and the discharge unit between each DC output unit group, and controls the output current and output voltage of each DC output unit group, realizing the control of multiple Series-parallel switching of DC output units.
  • circuit control timing diagram for parallel-to-series switching in the series-parallel switching circuit is described as an example as follows.
  • Fig. 6 is a schematic diagram of a circuit control timing diagram in a series-parallel switching circuit control method provided by an embodiment of the present application.
  • the circuit control timing diagram may include: the state of the state switching unit, the state of the discharge unit, the output Current and output voltage change state, etc.
  • the state switching unit may include: a first switch S1, a second switch S2, and a third switch S3; the circuit control sequence diagram may be configured to indicate: the open or closed state of the first switch S1 at at least one moment , the open or closed state of the second switch S2 at at least one moment, and the open or closed state of the third switch S3 at at least one moment.
  • the circuit control timing diagram includes: t0, t1, t2, t3, t4, t5, t6 and other seven different moments, for the convenience of explanation, only the first moment t0 is taken as For example, at the first time t0, the first switch S1 is in the closed state, the second switch S2 is in the closed state, and the third switch S3 is in the open state. At this time, the series-parallel switching circuit is in the parallel operation mode.
  • the at least two DC output units include: a first DC output unit and a second DC output unit; the circuit control timing diagram may be configured to indicate that the output current and output voltage of the first DC output unit are at least The state of change at one moment, and the state of change of the output current and output voltage of the second DC output unit at least one moment.
  • the output current IO1 and the output voltage Vout1 of the first DC output unit remain unchanged from the first moment t0 to the second moment t1, and the output current IO2 of the second DC output unit From t0 to the second moment t1 decreases to zero, and the output voltage Vout2 of the second DC output unit remains unchanged from t0 to the second moment t1.
  • Fig. 7 is a schematic flowchart of another series-parallel switching circuit control method provided by the embodiment of the present application; as shown in Fig. 7, the above step S402: according to the circuit control sequence diagram, the state of the state switching unit, the state of the discharge unit and The output current and output voltage of the two DC output units are controlled, which can include:
  • the series-parallel switching scheme is described by taking the series-parallel switching circuit including two DC output units as an example, that is, a first DC output unit and a second DC output unit.
  • first switch S1 and the second switch S2 are called parallel switches, and the third switch S3 is called a series switch.
  • the first switch S1 and the second switch S2 are in the closed state, and the third switch S3 is in the open state. Therefore, according to the circuit control timing diagram, the first switch S1 can be controlled to be turned off after the second time t1, the second switch S2 can be controlled to be turned off after the fourth time t3 or before the sixth time t5, and the third switch S3 can be controlled to be turned off after the fourth time t3 or before the sixth time t5.
  • the fourth moment t3 it is closed to complete the switching of the closed (or open) state of each switching device in the state switching unit, so as to switch the two DC output units from the parallel state to the series state.
  • the output current and output voltage of the discharge unit and each DC output unit must be controlled to ensure the reliability of the online parallel-to-series (or series-to-parallel) switching operation, and to ensure that the output voltage or The output current is stable and controllable, and the output power is not interrupted.
  • steps S704 to S707 will specifically explain how to effectively control the output current and output voltage of the discharge unit and each DC output unit during the switching process.
  • control the output current of the second DC output unit to decrease to zero from the first moment to the second moment, keep it at zero from the second moment to the fifth moment, and increase from the fifth moment to the sixth moment up to the target current value and keep it constant from the sixth moment.
  • the sixth moment is later than the fifth moment
  • the fifth moment is later than the second moment
  • the second moment is later than the first moment
  • control the output voltage of the first DC output unit to decrease to a first target voltage value from the sixth moment to the seventh moment, and the first target voltage value is obtained based on the number of DC output units.
  • the first target voltage value is half of the total output voltage Vout of the series-parallel switching circuit.
  • the first target voltage value is 1/4 of the total output voltage Vout of the series-parallel switching circuit.
  • control the output voltage of the second DC output unit to drop to zero from the third moment to the fourth moment, keep it at zero from the fourth moment to the sixth moment, and increase from the sixth moment to the seventh moment up to the first target voltage value.
  • step S701 to step S707 is a brief description of the parallel-to-series switching operation of the series-parallel switching circuit from the aspects of the output current and output voltage of the state switching unit, the discharge unit, and the DC output unit, respectively.
  • t0 Before the first moment t0, the series-parallel switching circuit is in a stable parallel operation mode, the first switch S1 and the second switch S2 are in the closed state, the third switch S3 is in the open state, and the discharge switch in the discharge unit S4 is kept disconnected and does not discharge.
  • the respective output currents Io1 and Io2 of the first DC output unit and the second DC output unit flow equally, which is approximately half of the total output current, and the output of the first DC output unit and the second DC output unit
  • the voltages Vout1 and Vout2 are the same as the total output voltage Vout.
  • Both the first switch S1 and the second switch S2 are in the closed state, and the flowing currents are Io1 and Io2 respectively. Since the on-resistance voltage drop of the first switch S1 and the second switch S2 is much smaller than the threshold voltage drop of the diode, the diode Almost no current flows through D1 and D2.
  • t0-t1 the parallel switches S1 and S2 are closed, the series switch S3 is turned off or disconnected, and the discharge switch S4 is kept turned off without discharging.
  • the second DC output unit gradually reduces the output current Io2 to zero through the loop control, and the duration from the first moment t0 to the second moment t1 is determined by the control loop parameters and the specific switching current size value to decide.
  • t1-t2 On the basis of the above switching state, after the second moment t1, turn off the parallel switch S1 after a proper delay (to ensure that the current is 0). At this time, S1 is turned off with zero current and zero voltage to ensure No loss and switching risk.
  • the discharge unit is started to discharge, that is, the discharge switch S4 is controlled to be in the closed state, and the voltage across the output capacitor C2 is gradually reduced to zero voltage through the discharge resistor R1, and the discharge switch S4 is generally controlled by the switching tube PWM. After the discharge is completed until the fourth time t3, the discharge switch S4 is controlled to be turned off.
  • the total output voltage of the series-parallel switching circuit is Vout, which is equal to the output voltage Vout1 of the first DC output unit and remains unchanged, but the total output current is Io1, which is halved compared with the previous one.
  • t3-t4 Before the fourth moment t3, S1 and S3 remain disconnected, S2 remains closed, the discharge at the fourth moment t3 is completed, and the discharge switch S4 is turned off, after a proper delay, the series switch S3 is controlled to close, and the fourth After the time t3 is properly delayed, S2 can be disconnected or postponed until before the sixth time t5.
  • the series switch S3 is controlled to close, that is, the series switch S3 is turned on with zero voltage and zero current, without loss and switching risk.
  • the parallel switch S2 is controlled to be turned off or disconnected (D2 guarantees the freewheeling path), and the original state can also be delayed until the sixth time t5 to turn off.
  • t4-t5 S1 is in the open state, S2 is in the open or closed state, S3 is in the closed state, and the discharge switch S4 remains open without discharging.
  • the output current Io2 of the second DC output unit is started through the loop control strategy, and gradually rises linearly to the steady-state value of Io2.
  • the current of the parallel switch S2 or D2 gradually decreases to 0.
  • turning off S2 can also achieve zero current and zero voltage shutdown .
  • S2 can be turned off between t3-t5, and the closer to the later turn-off time, the smaller the current, even if the current-carrying voltage is clamped by the D2 voltage, there is no risk.
  • the total output voltage of the series-parallel switching circuit is still Vout1, the output current is Io1, and Vout2 remains approximately 0V.
  • t5-t6 S1, S2, and S4 are in the disconnected state, and the series switch S3 is in the closed state.
  • the output voltage Vout1 of the first DC output unit and the output voltage Vout2 of the second DC output unit are linearly approached to 0.5Vout (voltage equalization control), so as to ensure that the total output voltage Vout of the series-parallel switching circuit remains unchanged.
  • the voltage equalization control is completed at the seventh time t6, and the output voltage Vout1 of the first DC output unit is approximately equal to the output voltage Vout2 of the second DC output unit, both of which are half of the total output voltage Vout.
  • the output current Io2 of the second DC output unit has reached the steady-state requirement, the current flowing through the parallel switch S2 drops to 0, and S2 is turned off before the sixth moment t5, completing the connection between S2 and the second DC output unit.
  • the transfer of the output current Io2 but at this time, the output voltage of the output capacitor C2 is still 0V, and the voltage equalization control and the constant output voltage control are completed in this interval.
  • the series mode switching is completed at the seventh time t6.
  • Fig. 8 is a schematic diagram of a circuit control timing diagram in another series-parallel switching circuit control method provided by the embodiment of the present application.
  • the circuit control timing diagram may include: the state of the state switching unit, the output current and the output voltage state of change, etc.
  • the working principle of the series-to-parallel connection in the control method of the series-parallel switching circuit provided by the embodiment of the present application will be explained as follows with reference to FIG. 8 and FIG. 9 .
  • the series-parallel switching is described by taking the example that the series-parallel switching circuit may include two DC output units, that is, a first DC output unit and a second DC output unit.
  • FIG. 9 is a schematic flowchart of another series-parallel switching circuit control method provided by the embodiment of the present application; optionally, as shown in Figure 9, the above step S402: according to the circuit control sequence diagram, the state of the state switching unit, discharge The state of the unit and the output current and output voltage of the two DC output units are controlled, which can include:
  • circuit control sequence diagram of the series-to-parallel mode is similar to the above-mentioned circuit control sequence diagram of the parallel-to-series mode, and the above sequence can be reversed.
  • the current transfer process in the series-parallel switching circuit is slightly different. That is, when the series mode is converted to the parallel mode, according to the circuit control timing diagram, only the state of the state switching unit, the output current and the output voltage of the two DC output units are controlled, and the state of the discharge unit is not controlled. However, if the voltage regulation cannot be completed after a delay, the discharge switch S4 is required to activate the discharge strategy.
  • step S901 to step S907 is a brief description of the switching process of the series-parallel switching circuit from series to parallel in terms of the output current and output voltage of the state switching unit, the discharge unit and the DC output unit respectively.
  • control the third switch to be turned off after the second moment or before the fourth moment; the fourth moment is later than the second moment.
  • Steps S901 to S903 are to control the closed (or open) state of each switching device in the state switching unit.
  • the third switch S3 Before the switch from series to parallel, the third switch S3 is in the closed state, and both the first switch S1 and the second switch S2 are in the open state. Therefore, according to the circuit control timing diagram, the first switch S1 can be controlled to close after the fifth time t4, the second switch S2 can be controlled to close from the third time t2, and the third switch S3 can be controlled to close after the second time t1 or the fourth time t1. Turn off before time t3 to complete the switching of the closed (or open) state of each switching device in the state switching unit, so as to switch the two DC output units from the series state to the parallel state.
  • the output current and output voltage of the discharge unit and each DC output unit must be controlled to ensure the reliability of the online series-to-parallel switching operation and the output voltage or output current of each DC output unit. Stable and controllable to achieve uninterrupted output power.
  • steps S904 to S907 will specifically explain how to control the output current and output voltage of the discharge unit and each DC output unit during the switching process.
  • control the output current of the second DC output unit to decrease to zero from the first moment to the second moment, keep it at zero from the second moment to the fifth moment, and increase to the target from the fifth moment current value and remain constant.
  • the above target current value is the total output current Io.
  • control the output voltage of the first DC output unit to increase to the second target voltage value from the first moment to the second moment, and keep it unchanged from the second moment; the second target Voltage values are based on the number of DC output units.
  • controlling the output voltage of the first DC output unit to increase to the second target voltage value from the first moment to the second moment refers to controlling the first The output voltage of the DC output unit rises from half of the total output voltage Vout to the total output voltage Vout from the first moment to the second moment.
  • control the output voltage of the second DC output unit to decrease to zero from the first moment to the second moment, keep it at zero from the second moment to the fourth moment, and increase from the fourth moment to the fifth moment up to the second target voltage value.
  • t0 Before the first moment t0, the series-parallel switching circuit is in a stable series operation mode, the parallel switches S1 and S2 are in the off state, the series switch S3 is in the closed state, and the discharge switch S4 in the discharge unit is kept in the off state , no discharge is performed.
  • the output currents Io1 and Io2 of the first DC output unit and the second DC output unit are the same as the total output current Io, and the output voltages Vout1 and Vout2 of the first DC output unit and the second DC output unit are approximately the same as 0.5Vout.
  • the diodes D1 and D2 bear the reverse voltage, therefore, no current flows through D1 and D2.
  • t0-t1 the parallel switches S1 and S2 are in the open state, and the series switch S3 is in the closed state.
  • the first DC output unit controls the output terminal voltage Vout1 of the output capacitor C1 to gradually increase to a stable demand value Vout, and the second DC output unit controls the output voltage Vout2 of the output capacitor C1 to gradually decrease to 0 (Io2 synchronously decreases to 0A).
  • Vout1 and Vout2 are Vout unchanged.
  • the current flowing through the diode D2 gradually increases to the rated current.
  • the upper and lower capacitor voltage conversion and the current transfer of Io2 and D2 are completed, and Io1 remains unchanged in the battery charging mode.
  • t1-t2 The parallel switches S1 and S2 are off. After a proper delay at the second time t1, the series switch S3 is controlled to be turned off or delayed until the fourth time t3.
  • the output voltage Vout2 of the second DC output unit is 0V
  • the output voltage Vout1 of the first DC output unit is the total output voltage Vout
  • the output of the first DC output unit The current Io1 is equal to the total output current Io
  • the output current Io2 of the second DC output unit is zero.
  • the output voltage of the output capacitor C2 in the second DC output unit drops to 0, and Io2 drops to 0A synchronously.
  • the current flowing through the series switch S3 is 0, and the current is transferred to the diode D2, and connected in series
  • the voltage across the series connection of the switch S3 and the rectifier bridge is clamped by the voltage drop of D2, and the series connection switch S3 can be controlled to be turned off after a delay of the second moment t1.
  • the switching waveform of the discharge switch S4 in the discharge unit for series-to-parallel switching is added.
  • the voltage regulation can be completed by relying on the load current, and the discharge switch S4 in the discharge unit does not need to participate in the serial-to-parallel conversion.
  • the discharge switch S4 needs to be activated Discharge strategy, reduce Vout2 voltage value to 0V. That is, it is also necessary to control the discharge cells to close in the interval after the second time t1 and before the third time t2; the third time is later than the second time.
  • t2-t3 The parallel switch S1 is kept open, the delay is until the third time t2 to control the parallel switch S2 to be in the closed state, and the series switch S3 is controlled to be turned off before the fourth time t3.
  • the series switch S3 is still closed, since it is connected in series with the rectifier bridge, it will not distribute the current, and it only needs to be turned off with an appropriate margin before the fourth moment t3.
  • the total output voltage Vout and the total output current Io are the same as the output voltage Vout1 and output current Io1 of the first DC output unit, and the output power of the second DC output unit is 0.
  • t3-t4 S1 and S3 are disconnected, and the parallel switch S2 is closed.
  • the energy output of the second DC output unit is started, and the voltage across the output capacitor C2 gradually rises according to the control target.
  • the output voltage Vout2 of the second DC output unit is equal to the voltage across the output voltage C1 approximately the same.
  • the output current Io2 of the second DC output unit is only charging the output capacitor C2, and the current is not large.
  • the parallel switch S1 is controlled to be closed, and the current flowing through the diode D1 is transferred to the parallel switch S1 to reduce loss, and the parallel switch S1 is closed with zero voltage.
  • Figure 10 is a schematic structural diagram of a series-parallel switching circuit control device provided by the embodiment of the present application;
  • Circuit connection the series-parallel switching circuit may include: at least two DC output units, a plurality of state switching units and a discharge unit, the DC output unit is connected to the output main circuit through the state switching unit, and the discharge unit is connected to the DC output unit;
  • the device may include : an acquisition module 1001 and a control module 1002.
  • the obtaining module 1001 may be configured to obtain a pre-generated circuit control sequence diagram; wherein, the circuit control sequence diagram may be configured to indicate the open or closed state of the state switching unit at at least one moment, and indicate at least two DC The output current of the output unit and the change state of the output voltage at at least one moment;
  • the control module 1002 can be configured to control the state of the state switching unit and the output current and output voltage of at least two DC output units according to the circuit control timing diagram, and control the state of the discharge unit so that at least two DC output units switch from parallel state to series state, or switch from series state to parallel state.
  • circuit control timing diagram may also be configured to indicate whether the discharge unit is in a discharge state at least at one moment;
  • the control module 1002 can also be configured to:
  • the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of at least two direct current output units are controlled.
  • control module 1002 may also be configured to:
  • the state of the state switching unit and the state of the discharge unit are controlled, and the output current and output voltage of the DC output units in each DC output unit group are respectively controlled;
  • each DC output unit group is used as a DC output unit to control the output current and output voltage of each DC output unit group.
  • the state switching unit may include: a first switch, a second switch, and a third switch; the circuit control timing diagram may be configured to indicate: the open or closed state of the first switch at at least one moment, the second switch The open or closed state at at least one moment, the open or closed state of the third switch at at least one moment.
  • the at least two DC output units may include: a first DC output unit and a second DC output unit; the circuit control timing diagram may be configured to indicate: the output current and the output voltage of the first DC output unit at The change state at least one moment, and the change state of the output current and the output voltage of the second DC output unit at at least one moment.
  • control module can also be configured for 1002:
  • the first switch is controlled to be disconnected after the second moment
  • the second switch is controlled to be disconnected after the fourth moment or before the sixth moment, and the sixth moment is later than the fourth moment;
  • the third switch is controlled to be closed after the fourth moment
  • the discharge unit is controlled to be closed between the third moment and the fourth moment; the fourth moment is later than the third moment;
  • the output current of the second DC output unit is controlled to decrease from the first moment to the second moment to zero, to keep it at zero from the second moment to the fifth moment, and to increase from the fifth moment to the sixth moment to
  • the target current value is kept constant from the sixth moment; the sixth moment is later than the fifth moment, the fifth moment is later than the second moment, and the second moment is later than the first moment;
  • the output voltage of the first DC output unit is controlled to decrease to a first target voltage value from the sixth moment to the seventh moment, and the first target voltage value is obtained based on the number of DC output units;
  • the output voltage of the second direct current output unit is controlled to decrease to zero from the third moment to the fourth moment, to remain at zero from the fourth moment to the sixth moment, and to increase from the sixth moment to the seventh moment to The first target voltage value.
  • control module 1002 may also be configured to:
  • the first switch is controlled to be closed after the fifth moment
  • the second switch is controlled to be closed from the third moment
  • the third switch is controlled to be disconnected after the second moment or before the fourth moment; the fourth moment is later than the second moment;
  • the output current of the second DC output unit is controlled to decrease to zero from the first moment to the second moment, remain at zero from the second moment to the fifth moment, and rise to the target current value from the fifth moment , and remain unchanged;
  • control the output voltage of the first DC output unit to increase to the second target voltage value from the first moment to the second moment, and keep it unchanged from the second moment; the second target voltage value Obtained based on the number of DC output units;
  • the output voltage of the second direct current output unit is controlled to decrease to zero from the first moment to the second moment, to remain at zero from the second moment to the fourth moment, and to increase from the fourth moment to the fifth moment to The second target voltage value.
  • control module 1002 may also be configured to:
  • the discharge unit is controlled to be closed after the second moment and before the third moment; the third moment is later than the second moment.
  • the above modules may be one or more integrated circuits configured to implement the above method, for example: one or more specific integrated circuits (Application Specific Integrated Circuit, referred to as ASIC), or, one or more microprocessors (digital singnal processor, DSP for short), or, one or more Field Programmable Gate Arrays (Field Programmable Gate Array, FPGA for short), etc.
  • ASIC Application Specific Integrated Circuit
  • DSP digital singnal processor
  • FPGA Field Programmable Gate Array
  • the processing element may be a general-purpose processor, such as a central processing unit (Central Processing Unit, referred to as CPU) or other processors that can call program codes.
  • CPU central processing unit
  • these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC for short).
  • FIG. 11 is a schematic structural diagram of a controller provided by an embodiment of the present application.
  • the controller may be integrated into a control terminal device or a chip of a control terminal device, or a computing device with a data processing function.
  • the controller may include: a processor 1101 , a storage medium 1102 and a bus 1103 .
  • the storage medium 1102 stores machine-readable instructions executable by the processor.
  • the processor 1101 communicates with the storage medium 1102 through the bus 1103, and the processor executes the machine-readable instructions to implement the above-mentioned embodiments. Steps of a control method for a series-parallel switching circuit. The specific implementation manner and technical effect are similar, and will not be repeated here.
  • the present application further provides a program product, such as a computer-readable storage medium, including a program, and the program is used to execute the foregoing method embodiments when executed by a processor.
  • a program product such as a computer-readable storage medium, including a program
  • the disclosed devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.
  • the above-mentioned integrated units implemented in the form of software functional units may be stored in a computer-readable storage medium.
  • the above-mentioned software functional units are stored in a storage medium, and include several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) or a processor (English: processor) to execute the functions described in various embodiments of the present application. part of the method.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (English: Read-Only Memory, abbreviated: ROM), random access memory (English: Random Access Memory, abbreviated: RAM), magnetic disk or optical disc, etc.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • magnetic disk or optical disc etc.
  • the application provides a control method, device, controller and storage medium for a series-parallel switching circuit, and relates to the technical field of power electronics.
  • the method includes: obtaining a pre-generated circuit control timing diagram; the circuit control timing diagram is configured to indicate the state of the state switching unit at at least one moment, and indicate the output current and output voltage of at least two direct current output units at at least one moment change state; according to the circuit control timing diagram, the state of the state switching unit and the output current and output voltage of at least two DC output units are controlled, and the state of the discharge unit is controlled to switch at least two DC output units from Switch from a parallel state to a series state, or, from a series state to a parallel state.
  • This solution can realize online series-parallel switching without shutting down, solves the problem in the related art that the output power is interrupted during the series-parallel switching, resulting in abnormal charging, and meets the normal charging needs of different loads.
  • series-parallel switching circuit control method, device, controller and storage medium of the present application are reproducible and can be used in various industrial applications.
  • the series-parallel switching circuit control method, device, controller and storage medium of the present application can be used in the field of power electronics technology.

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Abstract

The present application relates to the technical field of power electronics. Provided are a method and apparatus for controlling a series-parallel switching circuit, and a controller and a storage medium. The method comprises: acquiring a pre-generated circuit control timing diagram, wherein the circuit control timing diagram is configured to indicate the state of a state switching unit at at least one moment, and change states of output currents and output voltages of at least two direct-current output units at the at least one moment; and according to the circuit control timing diagram, controlling the state of the state switching unit and the output currents and the output voltages of the at least two direct-current output units, and controlling the state of a discharging unit, so as to switch the at least two direct-current output units from a parallel state to a series state, or from the series state to the parallel state. By means of the present solution, online series-parallel switching can be realized without shutdown, such that the problem in the related art of it being impossible to perform normal charging due to interruption of output power during series-parallel switching is solved, thereby meeting the normal charging requirements of different loads.

Description

串并联切换电路控制方法、装置、控制器及存储介质Series-parallel switching circuit control method, device, controller and storage medium
相关申请的交叉引用Cross References to Related Applications
本申请要求于2021年09月29日提交中国国家知识产权局的申请号为202111152209.6、名称为“串并联切换电路控制方法、装置、控制器及存储介质”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application with the application number 202111152209.6 and titled "Series-parallel switching circuit control method, device, controller and storage medium" submitted to the State Intellectual Property Office of China on September 29, 2021, all of which The contents are incorporated by reference in this application.
技术领域technical field
本申请涉及电力电子技术领域，具体而言，涉及一种串并联切换电路控制方法、装置、控制器及存储介质。The present application relates to the technical field of power electronics, in particular, to a control method, device, controller and storage medium for a series-parallel switching circuit.
背景技术Background technique
串并联切换电路，是使用开关或接触器将两个独立的直流输出模块进行串联或并联切换连接，并基于此串并联切换电路，可以实现充电***的扩容，以满足不同负载的充电功率需求。The series-parallel switching circuit uses switches or contactors to connect two independent DC output modules in series or in parallel. Based on this series-parallel switching circuit, the charging system can be expanded to meet the charging power requirements of different loads.
目前，直流输出串并联切换涉及两路或者多路输出之间进行切换，当从串联切换为并联时，分别将至少两个直流输出单元的输出电压关闭，但是由于输出电容的存在，输出电压不会直接降低到零，其残留电压无法保证绝对相等，且在切换为并联瞬间，两路直流输出电容直接被短路，电压差产生的电流冲击很容易导致开关器件损坏。即使不考虑串并联电容产生的冲击电流，串联切并联电压减半，并联转串联电压加倍，即无法直接进行串并联切换。因此，相关技术中采用先停机后放电，再完成串并联电路的切换。At present, DC output series-parallel switching involves switching between two or more outputs. When switching from series to parallel, the output voltages of at least two DC output units are respectively turned off, but due to the existence of output capacitors, the output voltage does not It will be directly reduced to zero, and the residual voltage cannot be guaranteed to be absolutely equal, and at the moment of switching to parallel connection, the two DC output capacitors are directly short-circuited, and the current impact generated by the voltage difference can easily cause damage to the switching device. Even if the inrush current generated by the series-parallel capacitor is not considered, the series-to-parallel voltage is halved, and the parallel-to-series voltage is doubled, that is, the series-parallel switch cannot be directly performed. Therefore, in the related art, the discharge is performed after the shutdown, and then the switching of the series-parallel circuit is completed.
但是，采用静态停机切换，导致输出功率中断，进而可能会影响正常的充电。However, the use of static shutdown switching results in interruption of output power, which may affect normal charging.
发明内容Contents of the invention
本申请提供了一种串并联切换电路控制方法、装置、控制器及存储介质，使得不需要停机也能够实现进行在线串并联切换，并保证输出电压或输出电流平稳可控，有效解决相关技术中进行串并联切换时存在的输出功率中断导致不能正常充电的问题，进而满足了不同负载的正常充电需求。This application provides a series-parallel switching circuit control method, device, controller and storage medium, so that online series-parallel switching can be realized without stopping the machine, and the output voltage or output current is stable and controllable, effectively solving the problems in related technologies. The interruption of output power during series-parallel switching leads to the problem that normal charging cannot be performed, thereby meeting the normal charging requirements of different loads.
本申请实施例采用的技术方案如下：The technical scheme adopted in the embodiment of the present application is as follows:
本申请的一些实施例提供了一种串并联切换电路控制方法，应用于控制器，所述控制器与串并联切换电路连接，所述串并联切换电路可以包括：至少两个直流输出单元、多个状态切换单元以及放电单元，所述直流输出单元通过所述状态切换单元与输出主路连接，所述放电单元与所述直流输出单元连接；所述方法可以包括：Some embodiments of the present application provide a method for controlling a series-parallel switching circuit, which is applied to a controller, and the controller is connected to the series-parallel switching circuit. The series-parallel switching circuit may include: at least two DC output units, multiple A state switching unit and a discharge unit, the DC output unit is connected to the output main circuit through the state switching unit, and the discharge unit is connected to the DC output unit; the method may include:
获取预先生成的电路控制时序图；其中，所述电路控制时序图配置成用于指示所述状态切换单元在至少一个时刻的断开或闭合状态，以及指示所述至少两个直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态；Obtaining a pre-generated circuit control timing diagram; wherein, the circuit control timing diagram is configured to indicate the open or closed state of the state switching unit at at least one moment, and indicate the output of the at least two DC output units The change state of the current and the output voltage at at least one moment;
根据所述电路控制时序图，对所述状态切换单元的状态以及所述至少两个直流输出单元的输出电流以及输出电压进行控制，并对所述放电单元的状态进行控制，以将所述至少两个直流输出单元从并联状态切换至串联状态，或，从所述串联状态切换至所述并联状态。According to the circuit control timing diagram, the state of the state switching unit and the output current and output voltage of the at least two DC output units are controlled, and the state of the discharge unit is controlled, so that the at least The two DC output units are switched from the parallel state to the series state, or from the series state to the parallel state.
可选地，所述电路控制时序图还可以配置成用于指示所述放电单元在至少一个时刻是否处于放电状态；Optionally, the circuit control timing diagram may also be configured to indicate whether the discharge unit is in a discharge state at least at one moment;
所述根据所述电路控制时序图，对所述状态切换单元的状态以及所述至少两个直流输出单元的输出电流以及输出电压进行控制，可以包括：The controlling the state of the state switching unit and the output current and output voltage of the at least two DC output units according to the circuit control sequence diagram may include:
根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态以及所述至少两个直流输出单元的输出电流以及输出电压进行控制。According to the circuit control timing diagram, the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of the at least two direct current output units are controlled.
可选地，所述根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态以及所述至少两个直流输出单元的输出电流以及输出电压进行控制，可以包括：Optionally, the controlling the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of the at least two DC output units according to the circuit control timing diagram may include:
若所述直流输出单元的数量大于2，则将所述直流输出单元划分为至少一个直流输出单元组；If the number of the DC output units is greater than 2, then divide the DC output units into at least one DC output unit group;
根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态进行控制，并分别对各所述直流输出单元组中的直流输出单元的输出电流以及输出电压进行控制；According to the circuit control sequence diagram, the state of the state switching unit and the state of the discharge unit are controlled, and the output current and output voltage of the DC output units in each of the DC output unit groups are respectively controlled;
根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态进行控制，并将所述各直流输出单元组分别作为直流输出单元，对所述各直流输出单元组的输出电流以及输出电压进行控制。According to the circuit control timing diagram, the state of the state switching unit and the state of the discharge unit are controlled, and the groups of DC output units are respectively used as DC output units, and the groups of DC output units are respectively used as DC output units. The output current as well as the output voltage are controlled.
可选地，所述状态切换单元可以包括：第一开关、第二开关、第三开关；所述电路控制时序图配置 成用于指示：所述第一开关在至少一个时刻的断开或闭合状态、所述第二开关在至少一个时刻的断开或闭合状态、所述第三开关在至少一个时刻的断开或闭合状态。Optionally, the state switching unit may include: a first switch, a second switch, and a third switch; the circuit control timing diagram is configured to indicate: the opening or closing of the first switch at at least one moment state, the open or closed state of the second switch at at least one moment, and the open or closed state of the third switch at at least one moment.
可选地，所述至少两个直流输出单元可以包括：第一直流输出单元和第二直流输出单元；所述电路控制时序图配置成用于指示：所述第一直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态，以及所述第二直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态。Optionally, the at least two DC output units may include: a first DC output unit and a second DC output unit; the circuit control timing diagram is configured to indicate: the output of the first DC output unit The changing state of the current and the output voltage at at least one moment, and the changing state of the output current and the output voltage of the second DC output unit at at least one moment.
可选地，所述根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态以及所述两个直流输出单元的输出电流以及输出电压进行控制，可以包括：Optionally, the controlling the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of the two DC output units according to the circuit control timing diagram may include:
根据所述电路控制时序图，控制所述第一开关在第二时刻后断开；According to the circuit control timing diagram, control the first switch to turn off after the second moment;
根据所述电路控制时序图，控制所述第二开关在第四时刻后或第六时刻前断开，所述第六时刻晚于所述第四时刻；According to the circuit control timing diagram, the second switch is controlled to be turned off after the fourth moment or before the sixth moment, and the sixth moment is later than the fourth moment;
根据所述电路控制时序图，控制所述第三开关在所述第四时刻后闭合；According to the circuit control timing diagram, controlling the third switch to close after the fourth moment;
根据所述电路控制时序图，控制所述放电单元在第三时刻至所述第四时刻之间闭合；所述第四时刻晚于所述第三时刻；According to the circuit control timing diagram, the discharge unit is controlled to be closed between the third moment and the fourth moment; the fourth moment is later than the third moment;
根据所述电路控制时序图，控制所述第二直流输出单元的输出电流从第一时刻至所述第二时刻降低至零，在所述第二时刻至第五时刻保持为零，从所述第五时刻至第六时刻升高至目标电流值，并从所述第六时刻起保持不变；所述第六时刻晚于所述第五时刻，所述第五时刻晚于所述第二时刻，所述第二时刻晚于所述第一时刻；According to the circuit control timing diagram, the output current of the second DC output unit is controlled to decrease to zero from the first moment to the second moment, and to remain at zero from the second moment to the fifth moment, and from the From the fifth moment to the sixth moment, it increases to the target current value and remains unchanged from the sixth moment; the sixth moment is later than the fifth moment, and the fifth moment is later than the second time, the second time being later than the first time;
根据所述电路控制时序图，控制所述第一直流输出单元的输出电压在所述第六时刻至第七时刻降低至第一目标电压值，所述第一目标电压值基于所述直流输出单元的数量得到；According to the circuit control timing diagram, the output voltage of the first DC output unit is controlled to decrease to a first target voltage value at the sixth moment to the seventh moment, and the first target voltage value is based on the DC output The number of units is obtained;
根据所述电路控制时序图，控制所述第二直流输出单元的输出电压在所述第三时刻至所述第四时刻降低至零，在所述第四时刻至所述第六时刻保持为零，从所述第六时刻至所述第七时刻升高至所述第一目标电压值。According to the circuit control timing diagram, the output voltage of the second DC output unit is controlled to decrease to zero from the third moment to the fourth moment, and to remain at zero from the fourth moment to the sixth moment , increasing to the first target voltage value from the sixth moment to the seventh moment.
可选地，所述根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态以及所述两个直流输出单元的输出电流以及输出电压进行控制，可以包括：Optionally, the controlling the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of the two DC output units according to the circuit control timing diagram may include:
根据所述电路控制时序图，控制所述第一开关在第五时刻后闭合；According to the circuit control timing diagram, control the first switch to close after the fifth moment;
根据所述电路控制时序图，控制所述第二开关从第三时刻起闭合；According to the circuit control timing diagram, control the second switch to close from the third moment;
根据所述电路控制时序图，控制所述第三开关在第二时刻后或第四时刻前断开；所述第四时刻晚于所述第二时刻；According to the circuit control timing diagram, the third switch is controlled to be turned off after the second moment or before the fourth moment; the fourth moment is later than the second moment;
根据所述电路控制时序图，控制所述放电单元在所述第二时刻后至所述第三时刻前闭合；所述第三时刻晚于所述第二时刻；According to the circuit control timing diagram, the discharge unit is controlled to be closed after the second moment and before the third moment; the third moment is later than the second moment;
根据所述电路控制时序图，控制所述第二直流输出单元的输出电流从第一时刻至所述第二时刻降低至零，在所述第二时刻至所述第五时刻保持为零，从所述第五时刻起升高至目标电流值，并保持不变；According to the circuit control timing diagram, the output current of the second DC output unit is controlled to decrease from the first moment to the second moment to zero, and to remain at zero from the second moment to the fifth moment, from From the fifth moment, it rises to the target current value and remains unchanged;
根据所述电路控制时序图，控制所述第一直流输出单元的输出电压在所述第一时刻至所述第二时刻内升高至到第二目标电压值，并从所述第二时刻起保持不变；所述第二目标电压值基于直流输出单元的数量得到；According to the circuit control timing diagram, the output voltage of the first DC output unit is controlled to rise to the second target voltage value from the first moment to the second moment, and from the second moment remain unchanged; the second target voltage value is obtained based on the number of DC output units;
根据所述电路控制时序图，控制所述第二直流输出单元的输出电压在所述第一时刻至所述第二时刻降低至零，在所述第二时刻至所述第四时刻保持为零，从所述第四时刻至所述第五时刻升高至所述第二目标电压值。According to the circuit control timing diagram, the output voltage of the second DC output unit is controlled to decrease to zero from the first moment to the second moment, and to remain at zero from the second moment to the fourth moment , increasing to the second target voltage value from the fourth moment to the fifth moment.
可选地，所述根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态以及所述两个直流输出单元的输出电流以及输出电压进行控制，还可以包括：Optionally, the controlling the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of the two DC output units according to the circuit control timing diagram may further include:
根据所述电路控制时序图，控制所述放电单元在所述第二时刻后至所述第三时刻前闭合；所述第三时刻晚于所述第二时刻。According to the circuit control timing diagram, the discharge unit is controlled to be closed after the second moment and before the third moment; the third moment is later than the second moment.
本申请的另一些实施例还提供了一种串并联切换电路控制装置，应用于控制器，所述控制器与串并联切换电路连接，所述串并联切换电路包括：至少两个直流输出单元、多个状态切换单元以及放电单元，所述直流输出单元通过所述状态切换单元与输出主路连接，所述放电单元与所述直流输出单元连接；所述装置可以包括：获取模块、控制模块；Other embodiments of the present application also provide a series-parallel switching circuit control device, which is applied to a controller, and the controller is connected to the series-parallel switching circuit, and the series-parallel switching circuit includes: at least two DC output units, A plurality of state switching units and a discharge unit, the DC output unit is connected to the output main circuit through the state switching unit, and the discharge unit is connected to the DC output unit; the device may include: an acquisition module and a control module;
所述获取模块，配置成用于获取预先生成的电路控制时序图；其中，所述电路控制时序图配置成用于指示所述状态切换单元在至少一个时刻的断开或闭合状态，以及指示所述至少两个直流输出单元的输 出电流以及输出电压在至少一个时刻的变化状态；The acquisition module is configured to acquire a pre-generated circuit control timing diagram; wherein the circuit control timing diagram is configured to indicate the open or closed state of the state switching unit at least one moment, and indicate the The output current of the at least two DC output units and the change state of the output voltage at at least one moment;
所述控制模块，配置成用于根据所述电路控制时序图，对所述状态切换单元的状态以及所述至少两个直流输出单元的输出电流以及输出电压进行控制，并对所述放电单元的状态进行控制，以将所述至少两个直流输出单元从并联状态切换至串联状态，或，从所述串联状态切换至所述并联状态。The control module is configured to control the state of the state switching unit and the output current and output voltage of the at least two DC output units according to the circuit control timing diagram, and control the output current and output voltage of the discharge unit. The state is controlled to switch the at least two DC output units from a parallel state to a series state, or from the series state to the parallel state.
可选地，所述电路控制时序图还配置成用于指示所述放电单元在至少一个时刻是否处于放电状态；Optionally, the circuit control timing diagram is further configured to indicate whether the discharge unit is in a discharge state at least at one moment;
所述控制模块，还可以用于：The control module can also be used for:
根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态以及所述至少两个直流输出单元的输出电流以及输出电压进行控制。According to the circuit control timing diagram, the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of the at least two direct current output units are controlled.
可选地，所述控制模块，还可以配置成用于：Optionally, the control module can also be configured to:
若所述直流输出单元的数量大于2，则将所述直流输出单元划分为至少一个直流输出单元组；If the number of the DC output units is greater than 2, then divide the DC output units into at least one DC output unit group;
根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态进行控制，并分别对各所述直流输出单元组中的直流输出单元的输出电流以及输出电压进行控制；According to the circuit control sequence diagram, the state of the state switching unit and the state of the discharge unit are controlled, and the output current and output voltage of the DC output units in each of the DC output unit groups are respectively controlled;
根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态进行控制，并将所述各直流输出单元组分别作为直流输出单元，对所述各直流输出单元组的输出电流以及输出电压进行控制。According to the circuit control timing diagram, the state of the state switching unit and the state of the discharge unit are controlled, and the groups of DC output units are respectively used as DC output units, and the groups of DC output units are respectively used as DC output units. The output current as well as the output voltage are controlled.
可选地，所述状态切换单元可以包括：第一开关、第二开关、第三开关；所述电路控制时序图配置成用于指示：所述第一开关在至少一个时刻的断开或闭合状态、所述第二开关在至少一个时刻的断开或闭合状态、所述第三开关在至少一个时刻的断开或闭合状态。Optionally, the state switching unit may include: a first switch, a second switch, and a third switch; the circuit control timing diagram is configured to indicate: the opening or closing of the first switch at at least one moment state, the open or closed state of the second switch at at least one moment, and the open or closed state of the third switch at at least one moment.
可选地，所述至少两个直流输出单元可以包括：第一直流输出单元和第二直流输出单元；所述电路控制时序图配置成用于指示：所述第一直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态，以及所述第二直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态。Optionally, the at least two DC output units may include: a first DC output unit and a second DC output unit; the circuit control timing diagram is configured to indicate: the output of the first DC output unit The changing state of the current and the output voltage at at least one moment, and the changing state of the output current and the output voltage of the second DC output unit at at least one moment.
可选地，所述控制模块，还可以配置成用于：Optionally, the control module can also be configured to:
根据所述电路控制时序图，控制所述第一开关在第二时刻后断开；According to the circuit control timing diagram, control the first switch to turn off after the second moment;
根据所述电路控制时序图，控制所述第二开关在第四时刻后或第六时刻前断开，所述第六时刻晚于所述第四时刻；According to the circuit control timing diagram, the second switch is controlled to be turned off after the fourth moment or before the sixth moment, and the sixth moment is later than the fourth moment;
根据所述电路控制时序图，控制所述第三开关在所述第四时刻后闭合；According to the circuit control timing diagram, controlling the third switch to close after the fourth moment;
根据所述电路控制时序图，控制所述放电单元在第三时刻至所述第四时刻之间闭合；所述第四时刻晚于所述第三时刻；According to the circuit control timing diagram, the discharge unit is controlled to be closed between the third moment and the fourth moment; the fourth moment is later than the third moment;
根据所述电路控制时序图，控制所述第二直流输出单元的输出电流从第一时刻至所述第二时刻降低至零，在所述第二时刻至第五时刻保持为零，从所述第五时刻至第六时刻升高至目标电流值，并从所述第六时刻起保持不变；所述第六时刻晚于所述第五时刻，所述第五时刻晚于所述第二时刻，所述第二时刻晚于所述第一时刻；According to the circuit control timing diagram, the output current of the second DC output unit is controlled to decrease to zero from the first moment to the second moment, and to remain at zero from the second moment to the fifth moment, and from the From the fifth moment to the sixth moment, it increases to the target current value and remains unchanged from the sixth moment; the sixth moment is later than the fifth moment, and the fifth moment is later than the second time, the second time being later than the first time;
根据所述电路控制时序图，控制所述第一直流输出单元的输出电压在所述第六时刻至第七时刻降低至第一目标电压值，所述第一目标电压值基于所述直流输出单元的数量得到；According to the circuit control timing diagram, the output voltage of the first DC output unit is controlled to decrease to a first target voltage value at the sixth moment to the seventh moment, and the first target voltage value is based on the DC output The number of units is obtained;
根据所述电路控制时序图，控制所述第二直流输出单元的输出电压在所述第三时刻至所述第四时刻降低至零，在所述第四时刻至所述第六时刻保持为零，从所述第六时刻至所述第七时刻升高至所述第一目标电压值。According to the circuit control timing diagram, the output voltage of the second DC output unit is controlled to decrease to zero from the third moment to the fourth moment, and to remain at zero from the fourth moment to the sixth moment , increasing to the first target voltage value from the sixth moment to the seventh moment.
可选地，所述控制模块，还可以配置成用于：Optionally, the control module can also be configured to:
根据所述电路控制时序图，控制所述第一开关在第五时刻后闭合；According to the circuit control timing diagram, control the first switch to close after the fifth moment;
根据所述电路控制时序图，控制所述第二开关从第三时刻起闭合；According to the circuit control timing diagram, control the second switch to close from the third moment;
根据所述电路控制时序图，控制所述第三开关在第二时刻后或第四时刻前断开；所述第四时刻晚于所述第二时刻；According to the circuit control timing diagram, the third switch is controlled to be turned off after the second moment or before the fourth moment; the fourth moment is later than the second moment;
根据所述电路控制时序图，控制所述第二直流输出单元的输出电流从第一时刻至所述第二时刻降低至零，在所述第二时刻至所述第五时刻保持为零，从所述第五时刻起升高至目标电流值，并保持不变；According to the circuit control timing diagram, the output current of the second DC output unit is controlled to decrease from the first moment to the second moment to zero, and to remain at zero from the second moment to the fifth moment, from From the fifth moment, it rises to the target current value and remains unchanged;
根据所述电路控制时序图，控制所述第一直流输出单元的输出电压在所述第一时刻至所述第二时刻内升高至到第二目标电压值，并从所述第二时刻起保持不变；所述第二目标电压值基于直流输出单元的数量得到；According to the circuit control timing diagram, the output voltage of the first DC output unit is controlled to rise to the second target voltage value from the first moment to the second moment, and from the second moment remain unchanged; the second target voltage value is obtained based on the number of DC output units;
根据所述电路控制时序图，控制所述第二直流输出单元的输出电压在所述第一时刻至所述第二时刻降低至零，在所述第二时刻至所述第四时刻保持为零，从所述第四时刻至所述第五时刻升高至所述第二 目标电压值。According to the circuit control timing diagram, the output voltage of the second DC output unit is controlled to decrease to zero from the first moment to the second moment, and to remain at zero from the second moment to the fourth moment , increasing to the second target voltage value from the fourth moment to the fifth moment.
可选地，所述控制模块，还可以配置成用于：Optionally, the control module can also be configured to:
根据所述电路控制时序图，控制所述放电单元在所述第二时刻后至所述第三时刻前闭合；所述第三时刻晚于所述第二时刻。According to the circuit control timing diagram, the discharge unit is controlled to be closed after the second moment and before the third moment; the third moment is later than the second moment.
本申请的又一些实施例还提供了一种控制器，可以包括：处理器、存储介质和总线，所述存储介质存储有所述处理器可执行的机器可读指令，当控制器运行时，所述处理器与所述存储介质之间通过总线通信，所述处理器执行所述机器可读指令，以执行如第一方面实施例提供的所述方法的步骤。Some other embodiments of the present application also provide a controller, which may include: a processor, a storage medium, and a bus, where the storage medium stores machine-readable instructions executable by the processor. When the controller is running, The processor communicates with the storage medium through a bus, and the processor executes the machine-readable instructions to execute the steps of the method provided in the embodiment of the first aspect.
本申请的再一实施例还提供了一种计算机可读存储介质，所述存储介质上存储有计算机程序，所述计算机程序被处理器运行时执行如第一方面实施例提供的所述方法的步骤。Another embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is run by a processor, the method as provided in the first aspect embodiment is executed. step.
本申请的有益效果至少包括：The beneficial effects of the application at least include:
本申请实施例提供一种串并联切换电路控制方法、装置、控制器及存储介质，应用于控制器，控制器与串并联切换电路连接，串并联切换电路包括：至少两个直流输出单元、多个状态切换单元以及放电单元，直流输出单元通过状态切换单元与输出主路连接，放电单元与直流输出单元连接；该方法包括：获取预先生成的电路控制时序图；其中，电路控制时序图配置成用于指示状态切换单元在至少一个时刻的断开或闭合状态，以及指示至少两个直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态；根据电路控制时序图，对状态切换单元的状态以及至少两个直流输出单元的输出电流以及输出电压进行控制，并对放电单元的状态进行控制，以将至少两个直流输出单元从并联状态切换至串联状态，或，从串联状态切换至并联状态。在本方案中，控制器根据预先生成的电路控制时序图，控制“状态切换单元”在至少一个时刻处于断开或闭合状态，以及至少两个直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态，还有控制放电单元在某一时刻是否进行能量释放，以实现在线进行并联转串联(或串联转并联)的切换操作，使得不需要停机也能够实现在线串并联切换，并保证输出电压或输出电流平稳可控，有效解决相关技术中进行串并联切换时存在的输出功率中断导致不能正常充电的问题，进而满足了不同负载的正常充电需求。Embodiments of the present application provide a control method, device, controller, and storage medium for a series-parallel switching circuit, which are applied to a controller, and the controller is connected to a series-parallel switching circuit. The series-parallel switching circuit includes: at least two DC output units, multiple A state switching unit and a discharge unit, the DC output unit is connected to the output main circuit through the state switching unit, and the discharge unit is connected to the DC output unit; the method includes: obtaining a pre-generated circuit control timing diagram; wherein, the circuit control timing diagram is configured as It is used to indicate the open or closed state of the state switching unit at least one moment, and indicate the output current and output voltage change state of at least two DC output units at at least one moment; according to the circuit control sequence diagram, the state switching unit The state and the output current and output voltage of at least two DC output units are controlled, and the state of the discharge unit is controlled to switch at least two DC output units from a parallel state to a series state, or from a series state to a parallel state. state. In this solution, the controller controls the "state switching unit" to be in the open or closed state at least one moment according to the pre-generated circuit control sequence diagram, and the output current and output voltage of at least two DC output units are at least one moment The changing state of the discharge unit, as well as controlling whether the discharge unit releases energy at a certain moment, so as to realize the switching operation from parallel to series (or series to parallel) online, so that online series-parallel switching can be realized without stopping the machine, and the output is guaranteed. The voltage or output current is stable and controllable, which effectively solves the problem of abnormal charging caused by output power interruption during series-parallel switching in related technologies, thereby meeting the normal charging needs of different loads.
附图说明Description of drawings
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, so It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.
图1为本申请实施例提供的一种串并联切换电路的结构示意图；FIG. 1 is a schematic structural diagram of a series-parallel switching circuit provided in an embodiment of the present application;
图2为本申请实施例提供的另一种串并联切换电路的结构示意图；FIG. 2 is a schematic structural diagram of another series-parallel switching circuit provided by the embodiment of the present application;
图3为本申请实施例提供的一种串并联切换电路控制***的结构框图；FIG. 3 is a structural block diagram of a series-parallel switching circuit control system provided by an embodiment of the present application;
图4为本申请实施例提供的一种串并联切换电路控制方法的流程示意图；FIG. 4 is a schematic flowchart of a method for controlling a series-parallel switching circuit provided in an embodiment of the present application;
图5为本申请实施例提供的另一种串并联切换电路控制方法的流程示意图；FIG. 5 is a schematic flowchart of another method for controlling a series-parallel switching circuit provided in an embodiment of the present application;
图6为本申请实施例提供的一种串并联切换电路控制方法中电路控制时序图的示意图；6 is a schematic diagram of a circuit control timing diagram in a method for controlling a series-parallel switching circuit provided in an embodiment of the present application;
图7为本申请实施例提供的又一种串并联切换电路控制方法的流程示意图；FIG. 7 is a schematic flowchart of another method for controlling a series-parallel switching circuit provided by an embodiment of the present application;
图8为本申请实施例提供的另一种串并联切换电路控制方法中电路控制时序图的示意图；FIG. 8 is a schematic diagram of a circuit control timing diagram in another method for controlling a series-parallel switching circuit provided by an embodiment of the present application;
图9为本申请实施例提供的又一种串并联切换电路控制方法的流程示意图；FIG. 9 is a schematic flowchart of another method for controlling a series-parallel switching circuit provided in an embodiment of the present application;
图10为本申请实施例提供的一种串并联切换电路控制装置的结构示意图；FIG. 10 is a schematic structural diagram of a series-parallel switching circuit control device provided in an embodiment of the present application;
图11为本申请实施例提供的一种控制器的结构示意图。FIG. 11 is a schematic structural diagram of a controller provided by an embodiment of the present application.
图标：100-串并联切换电路；101-直流输出单元；102-状态切换单元；103-放电单元；300-串并联切换电路控制***；301-控制器；302-输出负载。Icons: 100-series-parallel switching circuit; 101-DC output unit; 102-state switching unit; 103-discharging unit; 300-series-parallel switching circuit control system; 301-controller; 302-output load.
具体实施方式Detailed ways
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，应当理解，本申请中附图仅起到说明和描述的目的，并不用于限定本申请的保护范围。另外，应当理解，示意性的附图并未按实物比例绘制。本申请中使用的流程图示出了根据本申请的一些实施例实现的操作。应该理解，流程图的操作可以不按顺序实现，没有逻辑的上下文关系的步骤可以反转顺序或者同时实施。此外，本领域技术人员在本申请内容的指引下，可以向流程图添加一个或多个其他操作，也可以从流程图中移除一个或多个操作。In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the appended The figures are only for the purpose of illustration and description, and are not used to limit the protection scope of the present application. Additionally, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented in accordance with some embodiments of the application. It should be understood that the operations of the flowcharts may be performed out of order, and steps that have no logical context may be performed in reverse order or concurrently. In addition, those skilled in the art may add one or more other operations to the flowchart or remove one or more operations from the flowchart under the guidance of the content of the present application.
另外，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。通常在此处附图中描述 和示出的本申请实施例的组件可以以各种不同的配置来布置和设计。因此，以下对在附图中提供的本申请的实施例的详细描述并非旨在限制要求保护的本申请的范围，而是仅仅表示本申请的选定实施例。基于本申请的实施例，本领域技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本申请保护的范围。In addition, the described embodiments are only some of the embodiments of the application, not all of the embodiments. The components of the embodiments of the application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present application.
需要说明的是，本申请实施例中将会用到术语“包括”，用于指出其后所声明的特征的存在，但并不排除增加其它的特征。It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features stated later, but does not exclude the addition of other features.
图1为本申请实施例提供的一种串并联切换电路的结构示意图；如图1所示，是一种无输出防反二极管的串并联切换电路，该串并联切换电路100可以包括：至少两个直流输出单元101、多个状态切换单元102以及放电单元103。Figure 1 is a schematic structural diagram of a series-parallel switching circuit provided by the embodiment of the present application; as shown in Figure 1, it is a series-parallel switching circuit without an output anti-reverse diode, and the series-parallel switching circuit 100 may include: at least two A DC output unit 101, a plurality of state switching units 102 and a discharge unit 103.
其中，直流输出单元101通过状态切换单元102与输出主路连接，输出主路用于连接后端负载，状态切换单元102用于切换至少两个直流输出单元101的串联或并联状态；放电单元103与直流输出单元101连接，用于将直流输出单元101中输出电容C2两端的电压逐步降低到零电压，能够有效减小串并联切换过程中流过状态切换单元102中各开关器件中的电流，进而保护了开关器件，延长了开关器件的使用寿命，并加快了完成切换的效率。Wherein, the DC output unit 101 is connected to the output main circuit through the state switching unit 102, the output main circuit is used to connect the back-end load, and the state switching unit 102 is used to switch the series or parallel connection state of at least two DC output units 101; the discharge unit 103 Connected with the DC output unit 101, it is used to gradually reduce the voltage across the output capacitor C2 in the DC output unit 101 to zero voltage, which can effectively reduce the current flowing through each switching device in the state switching unit 102 during the series-parallel switching process, and further The switching device is protected, the service life of the switching device is prolonged, and the switching efficiency is accelerated.
如下具体对图1中所示的串并联切换电路进行简单介绍。The series-parallel switching circuit shown in FIG. 1 is briefly introduced as follows.
继续参考图1，图1中所示的串并联切换电路可以包括两个直流输出单元，即支路1、支路2，其中，支路1、支路2为两个典型的全桥LLC功率电路部分。以支路2为例，支路2中的原边可以包括：输入电容C3、全桥开关网络(Q5、Q6、Q7、Q8)、谐振网络(L1、C4)、变压器，副边包可以括：二极管整流网络、采样电阻(Rsense2)、输出电容C2。Continuing to refer to FIG. 1, the series-parallel switching circuit shown in FIG. 1 may include two DC output units, namely branch 1 and branch 2, wherein branch 1 and branch 2 are two typical full-bridge LLC power circuit part. Taking branch 2 as an example, the primary side in branch 2 can include: input capacitor C3, full-bridge switching network (Q5, Q6, Q7, Q8), resonant network (L1, C4), transformer, and the secondary side package can include : Diode rectification network, sampling resistor (Rsense2), output capacitor C2.
上述支路1和支路2可采用并联、串联、独立三种输入方式，但是支路1和支路2均需具备独立可调的输出电压UO和输出电流IO的功能，否则无法实现输出功率不中断的切换目标。因此，支路1和支路2的输出电压和输出电流可独立输出，幅值大小在一定范围和时间内均可自由调整。The above-mentioned branch 1 and branch 2 can adopt three input modes: parallel connection, series connection and independent input, but both branch 1 and branch 2 need to have the functions of independently adjustable output voltage UO and output current IO, otherwise the output power cannot be realized. Switch targets without interruption. Therefore, the output voltage and output current of branch 1 and branch 2 can be output independently, and the amplitude can be adjusted freely within a certain range and time.
状态切换单元102可以包括：第一开关S1、第二开关S2以及第三开关S3，其中，第一开关S1、第二开关S2均是并联模式的切换开关，第一开关S1、第二开关S2可包括继电器和二极管，也可直接使用开关器件如MOS管、IGBT等。The state switching unit 102 may include: a first switch S1, a second switch S2, and a third switch S3, wherein the first switch S1 and the second switch S2 are switching switches in a parallel mode, and the first switch S1 and the second switch S2 Relays and diodes can be included, and switching devices such as MOS tubes and IGBTs can also be used directly.
第三开关S3是串联模式的切换开关，是单向导通的开关器件，如可以采用继电器、开关管等。The third switch S3 is a switching switch in series mode, which is a one-way switching device, for example, a relay, a switching tube, etc. can be used.
放电单元103可以包括：电阻R1和放电开关S4，电阻R1和放电开关S4是支路2的输出电容C2的放电网络。其中，R1是功率电阻，可采用单个电阻，也可多个电阻进行串并联组合，放电开关S4可为继电器或开关管等。The discharge unit 103 may include: a resistor R1 and a discharge switch S4 , the resistor R1 and the discharge switch S4 are a discharge network for the output capacitor C2 of the branch circuit 2 . Among them, R1 is a power resistor, a single resistor can be used, or multiple resistors can be combined in series and parallel, and the discharge switch S4 can be a relay or a switch tube.
此外，本申请实施例还提供的另一种串并联切换电路的结构，具体如下述图2所示。In addition, the embodiment of the present application also provides another structure of a series-parallel switching circuit, which is specifically shown in FIG. 2 below.
图2为本申请实施例提供的另一种串并联切换电路的结构示意图；如图2所示，是一种带防反二极管的串并联切换电路，在上述图1的基础上，将与D1并联的第一开关S1去除，并在输出电容C1后增加了二极管D3，这样即可实现带防反二极管方案，且将二极管D3串联在支路1的输出端，在切换过程中一直处于导通状态。Fig. 2 is a schematic structural diagram of another series-parallel switching circuit provided by the embodiment of the present application; as shown in Fig. The first switch S1 connected in parallel is removed, and the diode D3 is added behind the output capacitor C1, so that the anti-reverse diode scheme can be realized, and the diode D3 is connected in series with the output terminal of branch 1, and it is always on during the switching process state.
需要说明的是，图2所示的带防反二极管的串并联切换电路，除了去除第一开关S1、以及增加二极管D3之外，与上述图1的其他结构均一致，同样，图2所示的带防反二极管的串并联切换电路也可以使用本申请提供的串并联切换电路控制方法，只是减少了对第一开关S1闭合或断开状态的控制，对状态切换单元、放电单元、各直流输出单元的输出电流以及输出电压的控制方式均不变，进而实现了对串并联切换电路的切换操作，且不需要停机就能够实现在线串并联切换，并保证输出电压Vout或输出电流Io平稳可控，进而实现了输出功率不中断，有效解决相关技术中进行串并联切换时存在的输出功率中断导致不能正常充电的问题。It should be noted that, except for removing the first switch S1 and adding the diode D3, the series-parallel switching circuit with anti-reverse diodes shown in Fig. 2 is consistent with other structures in Fig. 1 above, and similarly, as shown in Fig. 2 The series-parallel switching circuit with anti-reverse diodes can also use the series-parallel switching circuit control method provided by the application, which only reduces the control of the closed or disconnected state of the first switch S1, and the state switching unit, the discharge unit, each DC The control mode of the output current and the output voltage of the output unit is unchanged, thereby realizing the switching operation of the series-parallel switching circuit, and realizing the online series-parallel switching without stopping the machine, and ensuring the stable and reliable output voltage Vout or output current Io control, thereby realizing the output power without interruption, and effectively solving the problem in the related art that the interruption of the output power during the series-parallel switching leads to the failure of normal charging.
如下对本申请所提供的串并联切换电路控制***的结构框图进行说明。The structural block diagram of the series-parallel switching circuit control system provided by the present application is described as follows.
图3为本申请实施例提供的一种串并联切换电路控制***的结构框图；如图3所示，该串并联切换电路控制***300可以包括：控制器301、串并联切换电路100、输出负载302。Fig. 3 is a structural block diagram of a series-parallel switching circuit control system provided by the embodiment of the present application; as shown in Fig. 302.
其中，控制器301与串并联切换电路100通讯连接，控制器301可以配置成用于根据预先生成的电路控制时序图，向串并联切换电路100中的多个状态切换单元102以及放电单元103发送在至少一个时刻的状态控制(断开或闭合)信号，以将至少两个直流输出单元101从并联状态切换至串联状态，或，从串联状态切换至并联状态，以满足不同输出负载302的充电功率需求。Wherein, the controller 301 is communicatively connected with the series-parallel switching circuit 100, and the controller 301 can be configured to send a plurality of state switching units 102 and discharge units 103 in the series-parallel switching circuit 100 according to a pre-generated circuit control timing diagram. State control (open or close) signal at at least one moment to switch at least two DC output units 101 from a parallel state to a series state, or switch from a series state to a parallel state to meet the charging of different output loads 302 power requirements.
其中，输出负载302可以是有源负载或纯阻负载，这两种负载的区别只是电压模式和电流模式的控制差异。Wherein, the output load 302 can be an active load or a pure resistance load, and the difference between these two loads is only the control difference between the voltage mode and the current mode.
在本实施例中，以常见的充电模式的蓄电池的电流限压模式，对本申请所提供的串并联切换电路控制方法的具体实现步骤和产生的有益效果进行说明。介绍串并联切换电路的切换控制过程。In this embodiment, the specific implementation steps and beneficial effects of the series-parallel switching circuit control method provided by the present application are described by using the current-limited voltage mode of the storage battery in a common charging mode. The switching control process of the series-parallel switching circuit is introduced.
图4为本申请实施例提供的一种串并联切换电路控制方法的流程示意图；该方法的执行主体可以是上述图3所示的控制器，如图4所示，该方法可以包括：Fig. 4 is a schematic flow chart of a method for controlling a series-parallel switching circuit provided by an embodiment of the present application; the execution body of the method may be the controller shown in Fig. 3 above, and as shown in Fig. 4, the method may include:
S401、获取预先生成的电路控制时序图。S401. Obtain a pre-generated circuit control sequence diagram.
其中，电路控制时序图可以配置成用于指示状态切换单元在至少一个时刻的断开或闭合状态，以及指示至少两个直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态。Wherein, the circuit control timing diagram can be configured to indicate the open or closed state of the state switching unit at at least one moment, and indicate the change state of the output current and output voltage of at least two DC output units at at least one moment.
需要说明的是，串并联切换电路中的至少两个直流输出单元的输出电流以及输出电压，均能够被控制器进行独立可调。It should be noted that the output currents and output voltages of at least two DC output units in the series-parallel switching circuit can be independently adjusted by the controller.
S402、根据电路控制时序图，对状态切换单元的状态以及至少两个直流输出单元的输出电流以及输出电压进行控制，并对放电单元的状态进行控制，以将至少两个直流输出单元从并联状态切换至串联状态，或，从串联状态切换至并联状态。S402. According to the circuit control timing diagram, control the state of the state switching unit and the output current and output voltage of at least two DC output units, and control the state of the discharge unit, so as to switch at least two DC output units from the parallel state Switch to series state, or, switch from series state to parallel state.
在本实施例中，根据串并联切换电路的切换需求，预先生成不同的电路控制时序。例如，当需要将串并联切换电路中的至少两个直流输出单元从“并联状态”切换至“串联状态”时，可以生成控制“状态切换单元”在至少一个时刻的断开或闭合状态、以及至少两个直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态的第一电路控制时序图，使得控制器能够根据该第一电路控制时序图，控制“状态切换单元”中在某一刻处于断开或闭合状态，以及至少两个直流输出单元的输出电流IO以及输出电压UO在至少一个时刻的升高、降低、或保持不变等变化状态，还有控制放电单元在某一时刻进行能量释放，以实现在线进行并联转串联的切换操作，使得不需要停机也能够实现在线串并联切换，并保证输出电压UO或输出电流IO平稳可控，进而实现了输出功率不中断，有效解决相关技术中进行串并联切换时存在的输出功率中断导致不能正常充电的问题。In this embodiment, different circuit control sequences are pre-generated according to switching requirements of the series-parallel switching circuit. For example, when it is necessary to switch at least two DC output units in the series-parallel switching circuit from the "parallel state" to the "series state", it is possible to generate and control the open or closed state of the "state switching unit" at at least one moment, and The first circuit control timing diagram of the output current of at least two DC output units and the change state of the output voltage at at least one moment, so that the controller can control the "state switching unit" at a certain moment according to the first circuit control timing diagram. It is in the open or closed state, and the output current IO and the output voltage UO of at least two DC output units increase, decrease, or remain unchanged at least one moment, and the discharge unit is controlled at a certain moment. Energy release to realize online parallel-to-series switching operation, so that online series-parallel switching can be realized without stopping the machine, and the output voltage UO or output current IO is stable and controllable, thereby realizing uninterrupted output power and effectively solving related problems. In the technology, when the series-parallel switching is performed, the output power interruption causes the problem that the normal charging cannot be performed.
又例如，当从“串联状态”切换至“并联状态”时，可以根据预先生成的第二电路控制时序，对状态切换单元的状态以及至少两个直流输出单元的输出电流以及输出电压进行控制，以实现在线进行串联转并联的切换操作，并保证输出功率不中断，进而满足了不同负载的正常充电需求。For another example, when switching from the "series state" to the "parallel state", the state of the state switching unit and the output current and output voltage of at least two DC output units can be controlled according to the pre-generated second circuit control sequence, In order to realize the switching operation of series to parallel connection online, and ensure the output power is not interrupted, thus meeting the normal charging requirements of different loads.
综上所述，本申请实施例提供一种串并联切换电路控制方法，该方法应用于控制器，其中，控制器与串并联切换电路连接，串并联切换电路可以包括：至少两个直流输出单元、多个状态切换单元以及放电单元，直流输出单元通过状态切换单元与输出主路连接，放电单元与直流输出单元连接；该方法可以包括：获取预先生成的电路控制时序图；其中，电路控制时序图可以配置成用于指示状态切换单元在至少一个时刻的断开或闭合状态，以及指示至少两个直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态；根据电路控制时序图，对状态切换单元的状态以及至少两个直流输出单元的输出电流以及输出电压进行控制，并对放电单元的状态进行控制，以将至少两个直流输出单元从并联状态切换至串联状态，或，从串联状态切换至并联状态。在本方案中，控制器根据预先生成的电路控制时序图，控制“状态切换单元”在至少一个时刻处于断开或闭合状态，以及至少两个直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态，还有控制放电单元在某一时刻是否进行能量释放，以实现在线进行并联转串联(或串联转并联)的切换操作，使得不需要停机也能够实现在线串并联切换，并保证输出电压或输出电流平稳可控，有效解决相关技术中进行串并联切换时存在的输出功率中断导致不能正常充电的问题，进而满足了不同负载的正常充电需求。In summary, the embodiment of the present application provides a method for controlling a series-parallel switching circuit, the method is applied to a controller, wherein the controller is connected to the series-parallel switching circuit, and the series-parallel switching circuit may include: at least two DC output units , a plurality of state switching units and a discharge unit, the DC output unit is connected to the output main circuit through the state switching unit, and the discharge unit is connected to the DC output unit; the method may include: obtaining a pre-generated circuit control sequence diagram; wherein, the circuit control sequence The diagram can be configured to indicate the open or closed state of the state switching unit at at least one moment, and indicate the change state of the output current and output voltage of at least two DC output units at at least one moment; according to the circuit control sequence diagram, for The state of the state switching unit and the output current and output voltage of at least two DC output units are controlled, and the state of the discharge unit is controlled to switch at least two DC output units from a parallel state to a series state, or from a series state The state switches to the parallel state. In this solution, the controller controls the "state switching unit" to be in the open or closed state at least one moment according to the pre-generated circuit control sequence diagram, and the output current and output voltage of at least two DC output units are at least one moment The changing state of the discharge unit, as well as controlling whether the discharge unit releases energy at a certain moment, so as to realize the switching operation from parallel to series (or series to parallel) online, so that online series-parallel switching can be realized without stopping the machine, and the output is guaranteed. The voltage or output current is stable and controllable, which effectively solves the problem of abnormal charging caused by output power interruption during series-parallel switching in related technologies, thereby meeting the normal charging needs of different loads.
可选地，电路控制时序图还可以配置成用于指示放电单元在至少一个时刻是否处于放电状态；Optionally, the circuit control timing diagram may also be configured to indicate whether the discharge unit is in a discharge state at least at one moment;
根据电路控制时序图，对状态切换单元的状态以及至少两个直流输出单元的输出电流以及输出电压进行控制，可以包括：According to the circuit control timing diagram, controlling the state of the state switching unit and the output current and output voltage of at least two DC output units may include:
根据电路控制时序图，对状态切换单元的状态、放电单元的状态以及至少两个直流输出单元的输出电流以及输出电压进行控制。According to the circuit control timing diagram, the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of at least two direct current output units are controlled.
需要说明的是，在将至少两个直流输出单元从“并联状态”切换至“串联状态”的过程中，由于输出电容C2两端还存在一定量的电压，若不能够及时释放掉，则会出现较大的冲击电流，容易导致状态切换单元中的各开关器件被损坏。因此，需要对放电单元在某一时刻的能量释放状态进行控制。It should be noted that during the process of switching at least two DC output units from the "parallel state" to the "series state", since there is still a certain amount of voltage at both ends of the output capacitor C2, if it cannot be released in time, it will A large inrush current may easily cause damage to each switching device in the state switching unit. Therefore, it is necessary to control the energy release state of the discharge unit at a certain moment.
所以，在从“并联状态”切换至“串联状态”时，电路控制时序图还可以配置成用于指示放电单元在至 少一个时刻是否处于放电状态，以降低在切换过程中对状态切换单元产生的电流冲击，防止状态切换单元过流损坏，同时还可以通过设置放电单元加快并联状态切换至串联状态的效率。Therefore, when switching from the "parallel state" to the "series state", the circuit control timing diagram can also be configured to indicate whether the discharge unit is in the discharge state at least at one moment, so as to reduce the impact on the state switching unit during the switching process. The current impact prevents the overcurrent damage of the state switching unit, and at the same time, the efficiency of switching from the parallel state to the series state can be accelerated by setting the discharge unit.
图5为本申请实施例提供的另一种串并联切换电路控制方法的流程示意图，如图5所示，上述步骤S401、根据电路控制时序图，对状态切换单元的状态、放电单元的状态以及至少两个直流输出单元的输出电流以及输出电压进行控制，可以包括：Fig. 5 is a schematic flowchart of another series-parallel switching circuit control method provided by the embodiment of the present application. As shown in Fig. 5, the above step S401, according to the circuit control timing diagram, checks the state of the state switching unit, the state of the discharge unit and The output current and output voltage of at least two DC output units are controlled, which may include:
S501、若直流输出单元的数量大于2，则将直流输出单元划分为至少一个直流输出单元组。S501. If the number of DC output units is greater than 2, divide the DC output units into at least one DC output unit group.
在本实施例中，图1中所示的串并联切换电路中包括的至少两个直流输出单元可以扩充到n直流输出单元，即直流输出单元的数量大于2的串并联切换场合，以提高本申请提供的串并联切换电路的实用性。In this embodiment, at least two DC output units included in the series-parallel switching circuit shown in FIG. The practicability of the series-parallel switching circuit provided by the application.
例如，直流输出单元的数量是4，则可以将这4个直流输出单元划分为2个直流输出单元组。其中，每一个直流输出单元组中均包括2个直流输出单元；或者，一个直流输出单元组中包括1个直流输出单元，另一个直流输出单元组中包括3个直流输出单元。For example, if the number of DC output units is 4, these 4 DC output units may be divided into 2 DC output unit groups. Wherein, each DC output unit group includes 2 DC output units; or, one DC output unit group includes 1 DC output unit, and the other DC output unit group includes 3 DC output units.
S502、根据电路控制时序图，对状态切换单元的状态、放电单元的状态进行控制，并分别对各直流输出单元组中的直流输出单元的输出电流以及输出电压进行控制。S502. According to the circuit control timing diagram, control the state of the state switching unit and the state of the discharge unit, and respectively control the output current and output voltage of the DC output units in each DC output unit group.
在上述实施例的基础上，可以将包括1个直流输出单元称为第一直流输出单元组，将包括3个直流输出单元称为第二直流输出单元组。On the basis of the foregoing embodiments, the group including one DC output unit may be referred to as a first DC output unit group, and the group including three DC output units may be referred to as a second DC output unit group.
为了提高切换效率，可以先以将各直流输出单元组中的直流输出单元从并联状态切换至串联状态，或，从串联状态切换至并联状态。In order to improve switching efficiency, the DC output units in each DC output unit group may be switched from a parallel state to a series state, or from a series state to a parallel state.
比如，上述4个直流输出单元均为并联连接关系，需要从并联状态切换至串联状态，因此，可以先将第二直流输出单元组中的3个直流输出单元从并联状态切换至串联状态，然后，再将第一直流输出单元组包括1个直流输出单元，与“切换至串联连接的3个直流输出单元”进行并串联切换。For example, the above four DC output units are connected in parallel and need to be switched from the parallel state to the series state. Therefore, the three DC output units in the second DC output unit group can be switched from the parallel state to the series state first, and then , and then the first DC output unit group includes 1 DC output unit, and "switch to 3 DC output units connected in series" to perform parallel-series switching.
因此，可以根据电路控制时序图，对第一直流输出单元组和第二直流输出单元组的状态切换单元、放电单元进行控制，并分别对各直流输出单元组中的直流输出单元的输出电流以及输出电压进行控制，以将各直流输出单元组中的直流输出单元从并联状态切换至串联状态，或，从串联状态切换至并联状态。Therefore, according to the circuit control timing diagram, the state switching unit and the discharge unit of the first DC output unit group and the second DC output unit group can be controlled, and the output currents of the DC output units in each DC output unit group can be controlled respectively. And the output voltage is controlled to switch the DC output units in each DC output unit group from a parallel state to a series state, or from a series state to a parallel state.
S503、根据电路控制时序图，对状态切换单元的状态、放电单元的状态进行控制，并将各直流输出单元组分别作为直流输出单元，对各直流输出单元组的输出电流以及输出电压进行控制。S503. According to the circuit control timing diagram, control the state of the state switching unit and the state of the discharge unit, and use each DC output unit group as a DC output unit to control the output current and output voltage of each DC output unit group.
在完成了各直流输出单元组中的直流输出单元从并联状态切换至串联状态，或，从串联状态切换至并联状态之后，分别将第一直流输出单元组和第二直流输出单元组分别作为直流输出单元，又根据电路控制时序图，对各直流输出单元组之间的状态切换单元、放电单元进行控制，以及对各直流输出单元组的输出电流以及输出电压进行控制，实现了对多个直流输出单元的串并联切换。After completing the switching of the DC output units in each DC output unit group from the parallel state to the series state, or from the series state to the parallel state, the first DC output unit group and the second DC output unit group are respectively used as The DC output unit, according to the circuit control timing diagram, controls the state switching unit and the discharge unit between each DC output unit group, and controls the output current and output voltage of each DC output unit group, realizing the control of multiple Series-parallel switching of DC output units.
如下对本申请所提供的串并联切换电路中并联转串联的电路控制时序图为例进行说明。The circuit control timing diagram for parallel-to-series switching in the series-parallel switching circuit provided in the present application is described as an example as follows.
图6为本申请实施例提供的一种串并联切换电路控制方法中电路控制时序图的示意图，如图6所示，电路控制时序图可以包括：状态切换单元的状态、放电单元的状态、输出电流以及输出电压的变化状态等。Fig. 6 is a schematic diagram of a circuit control timing diagram in a series-parallel switching circuit control method provided by an embodiment of the present application. As shown in Fig. 6, the circuit control timing diagram may include: the state of the state switching unit, the state of the discharge unit, the output Current and output voltage change state, etc.
可选地，状态切换单元可以包括：第一开关S1、第二开关S2、第三开关S3；电路控制时序图可以配置成用于指示：第一开关S1在至少一个时刻的断开或闭合状态、第二开关S2在至少一个时刻的断开或闭合状态、第三开关S3在至少一个时刻的断开或闭合状态。Optionally, the state switching unit may include: a first switch S1, a second switch S2, and a third switch S3; the circuit control sequence diagram may be configured to indicate: the open or closed state of the first switch S1 at at least one moment , the open or closed state of the second switch S2 at at least one moment, and the open or closed state of the third switch S3 at at least one moment.
例如，参考图6所示的电路控制时序图，电路控制时序图包括：t0、t1、t2、t3、t4、t5、t6等七个不同的时刻，为了便于说明，只以第一时刻t0为例进行说明，在第一时刻t0，第一开关S1是闭合状态、第二开关S2是闭合状态、第三开关S3是断开状态，此时，串并联切换电路处于并联运行模式。For example, referring to the circuit control timing diagram shown in Figure 6, the circuit control timing diagram includes: t0, t1, t2, t3, t4, t5, t6 and other seven different moments, for the convenience of explanation, only the first moment t0 is taken as For example, at the first time t0, the first switch S1 is in the closed state, the second switch S2 is in the closed state, and the third switch S3 is in the open state. At this time, the series-parallel switching circuit is in the parallel operation mode.
可选地，至少两个直流输出单元包括：第一直流输出单元和第二直流输出单元；电路控制时序图可以配置成用于指示：第一直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态，以及第二直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态。Optionally, the at least two DC output units include: a first DC output unit and a second DC output unit; the circuit control timing diagram may be configured to indicate that the output current and output voltage of the first DC output unit are at least The state of change at one moment, and the state of change of the output current and output voltage of the second DC output unit at least one moment.
继续参考图6所示的电路控制时序图，第一直流输出单元的输出电流IO1和输出电压Vout1在第一时刻t0至第二时刻t1均保持不变，第二直流输出单元的输出电流IO2从t0至第二时刻t1降低至零，第二直流输出单元的输出电压Vout2在t0至第二时刻t1保持不变。Continuing to refer to the circuit control timing diagram shown in FIG. 6, the output current IO1 and the output voltage Vout1 of the first DC output unit remain unchanged from the first moment t0 to the second moment t1, and the output current IO2 of the second DC output unit From t0 to the second moment t1 decreases to zero, and the output voltage Vout2 of the second DC output unit remains unchanged from t0 to the second moment t1.
如下对本申请所提供的串并联切换电路中“并联转串联”的电路控制时序图的工作原理进行说明。The working principle of the "parallel to series" circuit control timing diagram in the series-parallel switching circuit provided by the present application is described as follows.
图7为本申请实施例提供的又一种串并联切换电路控制方法的流程示意图；如图7所示，上述步骤 S402：根据电路控制时序图，对状态切换单元的状态、放电单元的状态以及两个直流输出单元的输出电流以及输出电压进行控制，可以包括：Fig. 7 is a schematic flowchart of another series-parallel switching circuit control method provided by the embodiment of the present application; as shown in Fig. 7, the above step S402: according to the circuit control sequence diagram, the state of the state switching unit, the state of the discharge unit and The output current and output voltage of the two DC output units are controlled, which can include:
S701、根据电路控制时序图，控制第一开关在第二时刻后断开。S701. According to the circuit control timing diagram, control the first switch to turn off after the second moment.
S702、根据电路控制时序图，控制第二开关在第四时刻后或第六时刻前断开，第六时刻晚于第四时刻。S702. According to the circuit control timing diagram, control the second switch to turn off after the fourth moment or before the sixth moment, and the sixth moment is later than the fourth moment.
S703、根据电路控制时序图，控制第三开关在第四时刻后闭合。S703. According to the circuit control sequence diagram, control the third switch to close after the fourth moment.
为了便于说明，在本实施例中，以串并联切换电路包括两个直流输出单元为例，即第一直流输出单元和第二直流输出单元，对串并联切换方案进行说明。For ease of description, in this embodiment, the series-parallel switching scheme is described by taking the series-parallel switching circuit including two DC output units as an example, that is, a first DC output unit and a second DC output unit.
此外，将第一开关S1、第二开关S2称为并联开关，第三开关S3称为串联开关。In addition, the first switch S1 and the second switch S2 are called parallel switches, and the third switch S3 is called a series switch.
在并联转串联切换之前，第一开关S1、第二开关S2是处于闭合状态，第三开关S3是处于断开状态。因此，根据电路控制时序图，可以控制第一开关S1在第二时刻t1后断开，控制第二开关S2在第四时刻t3后或第六时刻t5前断开，以及控制第三开关S3在第四时刻t3后闭合，完成对状态切换单元中各开关器件的闭合(或断开)状态的切换，以将两个直流输出单元从并联状态切换至串联状态。Before switching from parallel to series, the first switch S1 and the second switch S2 are in the closed state, and the third switch S3 is in the open state. Therefore, according to the circuit control timing diagram, the first switch S1 can be controlled to be turned off after the second time t1, the second switch S2 can be controlled to be turned off after the fourth time t3 or before the sixth time t5, and the third switch S3 can be controlled to be turned off after the fourth time t3 or before the sixth time t5. After the fourth moment t3, it is closed to complete the switching of the closed (or open) state of each switching device in the state switching unit, so as to switch the two DC output units from the parallel state to the series state.
此外，在切换过程中，还得对放电单元、各直流输出单元的输出电流以及输出电压进行控制，以确保在线进行并联转串联(或串联转并联)切换操作的可靠性，并保证输出电压或输出电流平稳可控，实现输出功率不中断。In addition, during the switching process, the output current and output voltage of the discharge unit and each DC output unit must be controlled to ensure the reliability of the online parallel-to-series (or series-to-parallel) switching operation, and to ensure that the output voltage or The output current is stable and controllable, and the output power is not interrupted.
如下步骤S704至S707，将具体讲解如何在切换过程中，对放电单元、各直流输出单元的输出电流以及输出电压进行有效的控制。The following steps S704 to S707 will specifically explain how to effectively control the output current and output voltage of the discharge unit and each DC output unit during the switching process.
S704、根据电路控制时序图，控制放电单元在第三时刻至第四时刻之间闭合；第四时刻晚于第三时刻。S704. According to the circuit control timing diagram, control the discharge unit to close between the third moment and the fourth moment; the fourth moment is later than the third moment.
S705、根据电路控制时序图，控制第二直流输出单元的输出电流从第一时刻至第二时刻降低至零，在第二时刻至第五时刻保持为零，从第五时刻至第六时刻升高至目标电流值，并从第六时刻起保持不变。S705. According to the circuit control timing diagram, control the output current of the second DC output unit to decrease to zero from the first moment to the second moment, keep it at zero from the second moment to the fifth moment, and increase from the fifth moment to the sixth moment up to the target current value and keep it constant from the sixth moment.
其中，第六时刻晚于第五时刻，第五时刻晚于第二时刻，第二时刻晚于第一时刻。Wherein, the sixth moment is later than the fifth moment, the fifth moment is later than the second moment, and the second moment is later than the first moment.
S706、根据电路控制时序图，控制第一直流输出单元的输出电压在第六时刻至第七时刻降低至第一目标电压值，第一目标电压值基于直流输出单元的数量得到。S706. According to the circuit control timing diagram, control the output voltage of the first DC output unit to decrease to a first target voltage value from the sixth moment to the seventh moment, and the first target voltage value is obtained based on the number of DC output units.
例如，串并联切换电路包括2个直流输出单元，则第一目标电压值为串并联切换电路的总输出电压Vout的一半。又比如，串并联切换电路包括4个直流输出单元，则第一目标电压值为串并联切换电路的总输出电压Vout的四分之一。For example, if the series-parallel switching circuit includes two DC output units, the first target voltage value is half of the total output voltage Vout of the series-parallel switching circuit. For another example, if the series-parallel switching circuit includes 4 DC output units, the first target voltage value is 1/4 of the total output voltage Vout of the series-parallel switching circuit.
S707、根据电路控制时序图，控制第二直流输出单元的输出电压在第三时刻至第四时刻降低至零，在第四时刻至第六时刻保持为零，从第六时刻至第七时刻升高至第一目标电压值。S707. According to the circuit control timing diagram, control the output voltage of the second DC output unit to drop to zero from the third moment to the fourth moment, keep it at zero from the fourth moment to the sixth moment, and increase from the sixth moment to the seventh moment up to the first target voltage value.
上述步骤S701至步骤S707，是分别从状态切换单元、放电单元以及直流输出单元的输出电流以及输出电压等方面，对串并联切换电路的并联转串联切换操作进行了简单说明。The above step S701 to step S707 is a brief description of the parallel-to-series switching operation of the series-parallel switching circuit from the aspects of the output current and output voltage of the state switching unit, the discharge unit, and the DC output unit, respectively.
如下将从电路控制时序图包括的七个不同时刻，对串并联切换电路的并联转串联切换操作进行详细说明。The parallel-to-series switching operation of the series-parallel switching circuit will be described in detail as follows from the seven different moments included in the circuit control timing diagram.
1、t0：在第一时刻t0之前，串并联切换电路处于稳定的并联运行模式，第一开关S1和第二开关S2是闭合状态，第三开关S3是断开状态，放电单元中的放电开关S4是保持断开状态，不进行放电。1. t0: Before the first moment t0, the series-parallel switching circuit is in a stable parallel operation mode, the first switch S1 and the second switch S2 are in the closed state, the third switch S3 is in the open state, and the discharge switch in the discharge unit S4 is kept disconnected and does not discharge.
且，此时，第一直流输出单元和第二直流输出单元各自的输出电流Io1和Io2均流，近似相同为总输出电流的一半，第一直流输出单元和第二直流输出单元的输出电压Vout1、Vout2相同均为总输出电压Vout。Moreover, at this time, the respective output currents Io1 and Io2 of the first DC output unit and the second DC output unit flow equally, which is approximately half of the total output current, and the output of the first DC output unit and the second DC output unit The voltages Vout1 and Vout2 are the same as the total output voltage Vout.
第一开关S1和第二开关S2均是闭合状态，且流过电流分别是Io1和Io2，由于第一开关S1和第二开关S2的导通阻抗压降远小于二极管门槛压降，因此，二极管D1和D2几乎没有电流流过。Both the first switch S1 and the second switch S2 are in the closed state, and the flowing currents are Io1 and Io2 respectively. Since the on-resistance voltage drop of the first switch S1 and the second switch S2 is much smaller than the threshold voltage drop of the diode, the diode Almost no current flows through D1 and D2.
t0-t1：并联开关S1和S2是闭合状态，串联开关S3关断或断开，放电开关S4保持关断，不进行放电。t0-t1: the parallel switches S1 and S2 are closed, the series switch S3 is turned off or disconnected, and the discharge switch S4 is kept turned off without discharging.
在第一时刻t0至第二时刻t1，第二直流输出单元通过环路控制使得输出电流Io2逐渐降低到零，第一时刻t0至第二时刻t1的时长由控制环路参数和具体切换电流大小值来决定。From the first moment t0 to the second moment t1, the second DC output unit gradually reduces the output current Io2 to zero through the loop control, and the duration from the first moment t0 to the second moment t1 is determined by the control loop parameters and the specific switching current size value to decide.
3、t1-t2：在上述开关状态基础上，第二时刻t1后，适当延时(保证电流为0)后关断并联开关S1，此时，S1为零电流、零电压关断，以确保无损耗和切换风险。3. t1-t2: On the basis of the above switching state, after the second moment t1, turn off the parallel switch S1 after a proper delay (to ensure that the current is 0). At this time, S1 is turned off with zero current and zero voltage to ensure No loss and switching risk.
4、t2-t3：在第二时刻t1后控制并联开关S1断开后，并联开关S2依然处于闭合状态，串联开关S3 依然处于断开状态。4. t2-t3: After the parallel switch S1 is controlled to turn off after the second time t1, the parallel switch S2 is still in the closed state, and the series switch S3 is still in the open state.
由于二极管D1反堵，串并联切换电路的总输出电压Vout不会反灌到输出电容C2的两端。因此，第三时刻t2启动放电单元进行放电，即控制放电开关S4处于闭合状态，并通过放电电阻R1将输出电容C2两端的电压逐步降低到零电压，且放电开关S4一般采用开关管PWM控制，直至第四时刻t3放电完成后，控制放电开关S4断开。Due to the anti-blocking of the diode D1, the total output voltage Vout of the series-parallel switching circuit will not be fed back to both ends of the output capacitor C2. Therefore, at the third moment t2, the discharge unit is started to discharge, that is, the discharge switch S4 is controlled to be in the closed state, and the voltage across the output capacitor C2 is gradually reduced to zero voltage through the discharge resistor R1, and the discharge switch S4 is generally controlled by the switching tube PWM. After the discharge is completed until the fourth time t3, the discharge switch S4 is controlled to be turned off.
其中，串并联切换电路的总输出电压为Vout，与第一直流输出单元的输出电压Vout1相等，维持不变，但总输出电流为Io1，与之前比减半。Wherein, the total output voltage of the series-parallel switching circuit is Vout, which is equal to the output voltage Vout1 of the first DC output unit and remains unchanged, but the total output current is Io1, which is halved compared with the previous one.
5、t3-t4：在第四时刻t3前，S1和S3保持断开，S2保持闭合，第四时刻t3放电完成，且放电开关S4断开，适当延时后控制串联开关S3闭合，第四时刻t3适当延时后即可断开S2或推迟到第六时刻t5前。5. t3-t4: Before the fourth moment t3, S1 and S3 remain disconnected, S2 remains closed, the discharge at the fourth moment t3 is completed, and the discharge switch S4 is turned off, after a proper delay, the series switch S3 is controlled to close, and the fourth After the time t3 is properly delayed, S2 can be disconnected or postponed until before the sixth time t5.
此时，并联开关S2依然流过电流，第二直流输出单元的输出电压Vout2接近0V，也就是说，串联开关S3和第二直流输出单元的输出整流器两端总电压接近0V，第四时刻t3适当延时后，控制串联开关S3闭合，即串联开关S3为零电压、零电流开通，无损耗和切换风险。At this time, the current is still flowing through the parallel switch S2, and the output voltage Vout2 of the second DC output unit is close to 0V, that is to say, the total voltage across the series switch S3 and the output rectifier of the second DC output unit is close to 0V. After a proper delay, the series switch S3 is controlled to close, that is, the series switch S3 is turned on with zero voltage and zero current, without loss and switching risk.
此时，控制并联开关S2关断或断开(D2保证续流通路)，也可维持原状推迟到第六时刻t5关断。At this time, the parallel switch S2 is controlled to be turned off or disconnected (D2 guarantees the freewheeling path), and the original state can also be delayed until the sixth time t5 to turn off.
6、t4-t5：S1处于断开状态，S2处于断开或闭合状态，S3处于闭合状态，放电开关S4不放电保持断开。6. t4-t5: S1 is in the open state, S2 is in the open or closed state, S3 is in the closed state, and the discharge switch S4 remains open without discharging.
第五时刻t4，通过环路控制策略启动第二直流输出单元的输出电流Io2，逐步线性上升至Io2稳态值。此时，随着Io2增加，并联开关S2或D2的电流逐渐降低到0，此时，在第四时刻t3后或在第六时刻t5前，关断S2也可以实现零电流、零电压关断。At the fifth moment t4, the output current Io2 of the second DC output unit is started through the loop control strategy, and gradually rises linearly to the steady-state value of Io2. At this time, as Io2 increases, the current of the parallel switch S2 or D2 gradually decreases to 0. At this time, after the fourth time t3 or before the sixth time t5, turning off S2 can also achieve zero current and zero voltage shutdown .
S2关断可选择在t3-t5之间，越靠近后面关断时刻的电流越小，即使带电流电压被D2电压钳制无风险。此时串并联切换电路的总输出电压还是为Vout1，输出电流为Io1，Vout2还是保持近似0V。S2 can be turned off between t3-t5, and the closer to the later turn-off time, the smaller the current, even if the current-carrying voltage is clamped by the D2 voltage, there is no risk. At this time, the total output voltage of the series-parallel switching circuit is still Vout1, the output current is Io1, and Vout2 remains approximately 0V.
7、t5-t6：S1、S2、S4断开状态，串联开关S3处于闭合状态。第六时刻t5控制第一直流输出单元的输出电压Vout1和第二直流输出单元的输出电压Vout2向0.5Vout线性靠近(均压控制)，以确保串并联切换电路的总输出电压Vout不变，在第七时刻t6完成均压控制，第一直流输出单元的输出电压Vout1与第二直流输出单元的输出电压Vout2近似相等，均为总输出电压Vout的一半。7. t5-t6: S1, S2, and S4 are in the disconnected state, and the series switch S3 is in the closed state. At the sixth moment t5, the output voltage Vout1 of the first DC output unit and the output voltage Vout2 of the second DC output unit are linearly approached to 0.5Vout (voltage equalization control), so as to ensure that the total output voltage Vout of the series-parallel switching circuit remains unchanged, The voltage equalization control is completed at the seventh time t6, and the output voltage Vout1 of the first DC output unit is approximately equal to the output voltage Vout2 of the second DC output unit, both of which are half of the total output voltage Vout.
第六时刻t5，第二直流输出单元的输出电流Io2已经达到稳态需求，流过并联开关S2的电流降为0，第六时刻t5前关断S2，完成了S2和第二直流输出单元的输出电流Io2的转移，但是此时，输出电容C2的输出电压还一直为0V，此区间完成均压控制和输出电压不变的控制。此时，在第七时刻t6完成串联模式切换。At the sixth moment t5, the output current Io2 of the second DC output unit has reached the steady-state requirement, the current flowing through the parallel switch S2 drops to 0, and S2 is turned off before the sixth moment t5, completing the connection between S2 and the second DC output unit. The transfer of the output current Io2, but at this time, the output voltage of the output capacitor C2 is still 0V, and the voltage equalization control and the constant output voltage control are completed in this interval. At this time, the series mode switching is completed at the seventh time t6.
如下对本申请所提供的串并联切换电路中串联转并联的电路控制时序图的工作原理进行说明。The working principle of the circuit control sequence diagram of the series-to-parallel connection in the series-to-parallel switching circuit provided by the present application is described as follows.
图8为本申请实施例提供的另一种串并联切换电路控制方法中电路控制时序图的示意图，如图8所示，电路控制时序图可以包括：状态切换单元的状态、输出电流以及输出电压的变化状态等。如下将结合图8和图9对本申请实施例提供的串并联切换电路控制方法中的串联转并联的工作原理进行解释说明。Fig. 8 is a schematic diagram of a circuit control timing diagram in another series-parallel switching circuit control method provided by the embodiment of the present application. As shown in Fig. 8, the circuit control timing diagram may include: the state of the state switching unit, the output current and the output voltage state of change, etc. The working principle of the series-to-parallel connection in the control method of the series-parallel switching circuit provided by the embodiment of the present application will be explained as follows with reference to FIG. 8 and FIG. 9 .
为了便于说明，在本实施例中，也是以串并联切换电路可以包括两个直流输出单元为例，即第一直流输出单元和第二直流输出单元，对串并联切换进行说明。For ease of description, in this embodiment, the series-parallel switching is described by taking the example that the series-parallel switching circuit may include two DC output units, that is, a first DC output unit and a second DC output unit.
图9为本申请实施例提供的又一种串并联切换电路控制方法的流程示意图；可选地，如图9所示，上述步骤S402：根据电路控制时序图，对状态切换单元的状态、放电单元的状态以及两个直流输出单元的输出电流以及输出电压进行控制，可以包括：Figure 9 is a schematic flowchart of another series-parallel switching circuit control method provided by the embodiment of the present application; optionally, as shown in Figure 9, the above step S402: according to the circuit control sequence diagram, the state of the state switching unit, discharge The state of the unit and the output current and output voltage of the two DC output units are controlled, which can include:
需要说明的是，串联转并联模式的电路控制时序图，与上述并联转串联模式的电路控制时序图近似，将上述时序反过来即可。且，在串联转并联过程中，串并联切换电路中的电流转移过程略有差异。也即，在串联模式转并联模式时，根据电路控制时序图，只对状态切换单元的状态、两个直流输出单元的输出电流以及输出电压进行控制，并不对放电单元的状态进行控制。但是，若延时后未能完成电压调节，则需要放电开关S4启动放电策略。It should be noted that the circuit control sequence diagram of the series-to-parallel mode is similar to the above-mentioned circuit control sequence diagram of the parallel-to-series mode, and the above sequence can be reversed. Moreover, in the process of converting from series to parallel, the current transfer process in the series-parallel switching circuit is slightly different. That is, when the series mode is converted to the parallel mode, according to the circuit control timing diagram, only the state of the state switching unit, the output current and the output voltage of the two DC output units are controlled, and the state of the discharge unit is not controlled. However, if the voltage regulation cannot be completed after a delay, the discharge switch S4 is required to activate the discharge strategy.
下述步骤S901至步骤S907，是分别从状态切换单元、放电单元以及直流输出单元的输出电流以及输出电压等方面，对串并联切换电路的串联转并联的切换过程进行简单说明。The following step S901 to step S907 is a brief description of the switching process of the series-parallel switching circuit from series to parallel in terms of the output current and output voltage of the state switching unit, the discharge unit and the DC output unit respectively.
S901、根据电路控制时序图，控制第一开关在第五时刻后闭合。S901. According to the circuit control timing diagram, control the first switch to close after the fifth moment.
S902、根据电路控制时序图，控制第二开关从第三时刻起闭合。S902. According to the circuit control sequence diagram, control the second switch to close from the third moment.
S903、根据电路控制时序图，控制第三开关在第二时刻后或第四时刻前断开；第四时刻晚于第二时 刻。S903. According to the circuit control timing diagram, control the third switch to be turned off after the second moment or before the fourth moment; the fourth moment is later than the second moment.
步骤S901至步骤S903，是对状态切换单元中各开关器件的闭合(或断开)状态的控制。在串联转并联切换之前，第三开关S3是处于闭合状态，第一开关S1、第二开关S2均处于断开状态。因此，根据电路控制时序图，可以控制第一开关S1在第五时刻t4后闭合，控制第二开关S2从第三时刻t2起闭合，以及控制第三开关S3从第二时刻t1后或第四时刻t3前断开，完成对状态切换单元中各开关器件的闭合(或断开)状态的切换，以将两个直流输出单元从串联状态切换至并联状态。Steps S901 to S903 are to control the closed (or open) state of each switching device in the state switching unit. Before the switch from series to parallel, the third switch S3 is in the closed state, and both the first switch S1 and the second switch S2 are in the open state. Therefore, according to the circuit control timing diagram, the first switch S1 can be controlled to close after the fifth time t4, the second switch S2 can be controlled to close from the third time t2, and the third switch S3 can be controlled to close after the second time t1 or the fourth time t1. Turn off before time t3 to complete the switching of the closed (or open) state of each switching device in the state switching unit, so as to switch the two DC output units from the series state to the parallel state.
同样，在切换过程中，还得对放电单元、各直流输出单元的输出电流以及输出电压进行控制，以确保在线进行串联转并联切换操作的可靠性、以及各直流输出单元的输出电压或输出电流平稳可控，实现输出功率不中断。Similarly, during the switching process, the output current and output voltage of the discharge unit and each DC output unit must be controlled to ensure the reliability of the online series-to-parallel switching operation and the output voltage or output current of each DC output unit. Stable and controllable to achieve uninterrupted output power.
如下步骤S904至S907，将具体讲解如何在切换过程中，对放电单元、各直流输出单元的输出电流以及输出电压的控制。The following steps S904 to S907 will specifically explain how to control the output current and output voltage of the discharge unit and each DC output unit during the switching process.
S904、根据电路控制时序图，控制放电单元在第二时刻后至第三时刻前闭合；第三时刻晚于第二时刻。S904. According to the circuit control timing diagram, control the discharge unit to close after the second moment and before the third moment; the third moment is later than the second moment.
S905、根据电路控制时序图，控制第二直流输出单元的输出电流从第一时刻至第二时刻降低至零，在第二时刻至第五时刻保持为零，从第五时刻起升高至目标电流值，并保持不变。S905. According to the circuit control timing diagram, control the output current of the second DC output unit to decrease to zero from the first moment to the second moment, keep it at zero from the second moment to the fifth moment, and increase to the target from the fifth moment current value and remain constant.
例如，还是以串并联切换电路包括2个直流输出单元为例，即第一直流输出单元、第二直流输出单元，由于第一直流输出单元和第二直流输出单元是串联关系，因此，第一直流输出单元的输出电压Vout1与第二直流输出单元的输出电压Vout2均压近似相同为总输出电压Vout的一半，即Vout1＝Vout2＝0.5Vout，第一直流输出单元的输出电流Io1与第二直流输出单元的输出电压Io2均压近似相同为总输出电流Io。For example, it is still taken as an example that the series-parallel switching circuit includes two DC output units, that is, the first DC output unit and the second DC output unit. Since the first DC output unit and the second DC output unit are connected in series, therefore, The output voltage Vout1 of the first DC output unit and the output voltage Vout2 of the second DC output unit are approximately equal in voltage equalization, which is half of the total output voltage Vout, that is, Vout1=Vout2=0.5Vout, and the output current Io1 of the first DC output unit The total output current Io is approximately the same as the voltage equalization of the output voltage Io2 of the second DC output unit.
所以，上述目标电流值为总输出电流Io。Therefore, the above target current value is the total output current Io.
S906、根据电路控制时序图，控制第一直流输出单元的输出电压在第一时刻至第二时刻内升高至到第二目标电压值，并从第二时刻起保持不变；第二目标电压值基于直流输出单元的数量得到。S906. According to the circuit control timing diagram, control the output voltage of the first DC output unit to increase to the second target voltage value from the first moment to the second moment, and keep it unchanged from the second moment; the second target Voltage values are based on the number of DC output units.
其中，第二目标电压值为总输出电压Vout，因此，控制第一直流输出单元的输出电压在第一时刻至第二时刻内升高至到第二目标电压值，指的是控制第一直流输出单元的输出电压在第一时刻至第二时刻，从总输出电压Vout的一半升高至总输出电压Vout。Wherein, the second target voltage value is the total output voltage Vout, therefore, controlling the output voltage of the first DC output unit to increase to the second target voltage value from the first moment to the second moment refers to controlling the first The output voltage of the DC output unit rises from half of the total output voltage Vout to the total output voltage Vout from the first moment to the second moment.
S907、根据电路控制时序图，控制第二直流输出单元的输出电压在第一时刻至第二时刻降低至零，在第二时刻至第四时刻保持为零，从第四时刻至第五时刻升高至第二目标电压值。S907. According to the circuit control timing diagram, control the output voltage of the second DC output unit to decrease to zero from the first moment to the second moment, keep it at zero from the second moment to the fourth moment, and increase from the fourth moment to the fifth moment up to the second target voltage value.
在分别从状态切换单元、放电单元以及直流输出单元的输出电流以及输出电压等方面，对串并联切换电路的串联转并联的切换过程介绍完之后，如下将从电路控制时序图包括的五个不同时刻，对串并联切换电路的串联转并联切换过程进行简单说明。In terms of the output current and output voltage of the state switching unit, the discharge unit, and the DC output unit, etc., after introducing the switching process of the series-parallel switching circuit from series to parallel, the following will control the timing diagram of the slave circuit. The following five different At this time, a brief description will be given of the series-to-parallel switching process of the series-parallel switching circuit.
1、t0：在第一时刻t0之前，串并联切换电路处于稳定的串联运行模式，并联开关S1和S2是断开状态，串联开关S3闭合状态，放电单元中的放电开关S4是保持断开状态，不进行放电。1. t0: Before the first moment t0, the series-parallel switching circuit is in a stable series operation mode, the parallel switches S1 and S2 are in the off state, the series switch S3 is in the closed state, and the discharge switch S4 in the discharge unit is kept in the off state , no discharge is performed.
第一直流输出单元和第二直流输出单元各自的输出电流Io1和Io2相同均为总输出电流Io，第一直流输出单元和第二直流输出单元的输出电压Vout1、Vout2均压近似相同为0.5Vout。此时，由于并联开关S1和S2均断开，二极管D1和D2反向承受电压，因此，D1和D2没有电流流过。The output currents Io1 and Io2 of the first DC output unit and the second DC output unit are the same as the total output current Io, and the output voltages Vout1 and Vout2 of the first DC output unit and the second DC output unit are approximately the same as 0.5Vout. At this moment, since both the parallel switches S1 and S2 are turned off, the diodes D1 and D2 bear the reverse voltage, therefore, no current flows through D1 and D2.
2、t0-t1：并联开关S1和S2处于断开状态，串联开关S3处于闭合状态。2. t0-t1: the parallel switches S1 and S2 are in the open state, and the series switch S3 is in the closed state.
在第一时刻t0，第一直流输出单元控制输出电容C1的输出端电压Vout1逐步上升到稳定需求值Vout，第二直流输出单元控制输出电容C1的输出电压Vout2逐步下降到0(Io2同步下降到0A)。At the first moment t0, the first DC output unit controls the output terminal voltage Vout1 of the output capacitor C1 to gradually increase to a stable demand value Vout, and the second DC output unit controls the output voltage Vout2 of the output capacitor C1 to gradually decrease to 0 (Io2 synchronously decreases to 0A).
在此过程中，Vout1与Vout2之和为Vout不变。在Io2减少的过程中，流过二极管D2的电流逐步增加到额定电流，在第二时刻t1完成上下电容电压转换和Io2、D2电流的转移，Io1在蓄电池充电模式中保持不变。During this process, the sum of Vout1 and Vout2 is Vout unchanged. During the decreasing process of Io2, the current flowing through the diode D2 gradually increases to the rated current. At the second moment t1, the upper and lower capacitor voltage conversion and the current transfer of Io2 and D2 are completed, and Io1 remains unchanged in the battery charging mode.
3、t1-t2：并联开关S1、S2断开状态，在第二时刻t1适当延时后，控制串联开关S3关断或延迟到第四时刻t3前关断。在第二时刻t1至第三时刻t2这个区间内，第二直流输出单元的输出电压Vout2为0V，第一直流输出单元的输出电压Vout1为总输出电压Vout，第一直流输出单元的输出电流Io1等于总输出电流Io，第二直流输出单元的输出电流Io2为0。3. t1-t2: The parallel switches S1 and S2 are off. After a proper delay at the second time t1, the series switch S3 is controlled to be turned off or delayed until the fourth time t3. In the interval from the second moment t1 to the third moment t2, the output voltage Vout2 of the second DC output unit is 0V, the output voltage Vout1 of the first DC output unit is the total output voltage Vout, and the output of the first DC output unit The current Io1 is equal to the total output current Io, and the output current Io2 of the second DC output unit is zero.
在第二时刻t1，第二直流输出单元中输出电容C2的输出电压下降到0，Io2同步下降到0A，此时，流过串联开关S3电流为0，将电流转移到二极管D2中，且串联开关S3和整流桥串联两端电压被D2压降钳制，第二时刻t1延时之后即可控制串连开关S3关断。At the second moment t1, the output voltage of the output capacitor C2 in the second DC output unit drops to 0, and Io2 drops to 0A synchronously. At this time, the current flowing through the series switch S3 is 0, and the current is transferred to the diode D2, and connected in series The voltage across the series connection of the switch S3 and the rectifier bridge is clamped by the voltage drop of D2, and the series connection switch S3 can be controlled to be turned off after a delay of the second moment t1.
在本实施例中，增加串联转并联切换的放电单元中的放电开关S4的开关波形，正常负载电流较大时能够依靠负载电流完成电压调节，放电单元中的放电开关S4无需参与串转并的切换过程；如果由于负载电流较小或者空载没有负载电流，若延时后未能完成电压调节，即判断当前的Vout2电压值不在0V附近(跟检测精度有关系)，则需要放电开关S4启动放电策略，将Vout2电压值降低到0V。也即，还需要控制放电单元在第二时刻t1后至第三时刻t2前这个区间内闭合；第三时刻晚于第二时刻。In this embodiment, the switching waveform of the discharge switch S4 in the discharge unit for series-to-parallel switching is added. When the normal load current is large, the voltage regulation can be completed by relying on the load current, and the discharge switch S4 in the discharge unit does not need to participate in the serial-to-parallel conversion. Switching process; if the load current is small or there is no load current at no load, if the voltage regulation cannot be completed after a delay, that is, it is judged that the current Vout2 voltage value is not near 0V (related to the detection accuracy), the discharge switch S4 needs to be activated Discharge strategy, reduce Vout2 voltage value to 0V. That is, it is also necessary to control the discharge cells to close in the interval after the second time t1 and before the third time t2; the third time is later than the second time.
4、t2-t3：并联开关S1保持断开，延时到第三时刻t2控制并联开关S2处于闭合状态，在第四时刻t3前控制串联开关S3断开。4. t2-t3: The parallel switch S1 is kept open, the delay is until the third time t2 to control the parallel switch S2 to be in the closed state, and the series switch S3 is controlled to be turned off before the fourth time t3.
由于并联开关S2两端电压被二极管D2压降钳制，近似零电压开通，将D2的电流转移到S2中，使得损耗不大，切换风险小。Since the voltage at both ends of the parallel switch S2 is clamped by the voltage drop of the diode D2, it is turned on with approximately zero voltage, and the current of D2 is transferred to S2, so that the loss is small and the switching risk is small.
即使在第三时刻t2后，串联开关S3还是闭合，由于其与整流桥串联，也不会分配电流，第四时刻t3之前留有适当余量关断即可。此时总输出电压Vout和总输出电流Io与第一直流输出单元的输出电压Vout1、输出电流Io1相同，第二直流输出单元的输出功率为0。Even after the third moment t2, the series switch S3 is still closed, since it is connected in series with the rectifier bridge, it will not distribute the current, and it only needs to be turned off with an appropriate margin before the fourth moment t3. At this time, the total output voltage Vout and the total output current Io are the same as the output voltage Vout1 and output current Io1 of the first DC output unit, and the output power of the second DC output unit is 0.
5、t3-t4：S1、S3是断开状态，并联开关S2闭合。在第四时刻t3，启动第二直流输出单元的能量输出，输出电容C2两端的电压按照控制目标逐步上升，在第五时刻t4，第二直流输出单元的输出电压Vout2与输出电压C1两端电压近似相同。此时，第二直流输出单元的输出电流Io2只是向输出电容C2进行充电，电流不大。5. t3-t4: S1 and S3 are disconnected, and the parallel switch S2 is closed. At the fourth moment t3, the energy output of the second DC output unit is started, and the voltage across the output capacitor C2 gradually rises according to the control target. At the fifth moment t4, the output voltage Vout2 of the second DC output unit is equal to the voltage across the output voltage C1 approximately the same. At this time, the output current Io2 of the second DC output unit is only charging the output capacitor C2, and the current is not large.
6、t4后：并联开关S2保持闭合，在第五时刻t4，输出电容C2两端的电压接近输出电容C1两端的电压，电压继续增加被输出钳制，输出电流通过D1迅速增加到额定电流，总输出电流Io近似加倍。6. After t4: The parallel switch S2 remains closed. At the fifth moment t4, the voltage across the output capacitor C2 is close to the voltage across the output capacitor C1. The voltage continues to increase and is clamped by the output, and the output current rapidly increases to the rated current through D1. The total output The current Io is approximately doubled.
在第五时刻t4适当时间后，控制并联开关S1闭合，将流过二极管D1的电流转移到并联开关S1，降低损耗，并联开关S1为零电压闭合。After an appropriate time at the fifth moment t4, the parallel switch S1 is controlled to be closed, and the current flowing through the diode D1 is transferred to the parallel switch S1 to reduce loss, and the parallel switch S1 is closed with zero voltage.
以上是通过电流模式对切换过程说明，若输出带电阻工作在稳压源模式，输出电流由负载决定维持，此时并联时需完成对Io1和Io2的均流控制。The above is the description of the switching process through the current mode. If the output band resistor works in the voltage stabilizer mode, the output current is determined by the load to maintain. At this time, the current sharing control of Io1 and Io2 needs to be completed when connecting in parallel.
图10为本申请实施例提供的一种串并联切换电路控制装置的结构示意图；如图10所示，本申请实施例的串并联切换电路控制装置，应用于控制器，控制器与串并联切换电路连接，串并联切换电路可以包括：至少两个直流输出单元、多个状态切换单元以及放电单元，直流输出单元通过状态切换单元与输出主路连接，放电单元与直流输出单元连接；装置可以包括：获取模块1001、控制模块1002。Figure 10 is a schematic structural diagram of a series-parallel switching circuit control device provided by the embodiment of the present application; Circuit connection, the series-parallel switching circuit may include: at least two DC output units, a plurality of state switching units and a discharge unit, the DC output unit is connected to the output main circuit through the state switching unit, and the discharge unit is connected to the DC output unit; the device may include : an acquisition module 1001 and a control module 1002.
获取模块1001，可以配置成用于获取预先生成的电路控制时序图；其中，电路控制时序图可以配置成用于指示状态切换单元在至少一个时刻的断开或闭合状态，以及指示至少两个直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态；The obtaining module 1001 may be configured to obtain a pre-generated circuit control sequence diagram; wherein, the circuit control sequence diagram may be configured to indicate the open or closed state of the state switching unit at at least one moment, and indicate at least two DC The output current of the output unit and the change state of the output voltage at at least one moment;
控制模块1002，可以配置成用于根据电路控制时序图，对状态切换单元的状态以及至少两个直流输出单元的输出电流以及输出电压进行控制，并对放电单元的状态进行控制，以将至少两个直流输出单元从并联状态切换至串联状态，或，从串联状态切换至并联状态。The control module 1002 can be configured to control the state of the state switching unit and the output current and output voltage of at least two DC output units according to the circuit control timing diagram, and control the state of the discharge unit so that at least two DC output units switch from parallel state to series state, or switch from series state to parallel state.
可选地，电路控制时序图还可以配置成用于指示放电单元在至少一个时刻是否处于放电状态；Optionally, the circuit control timing diagram may also be configured to indicate whether the discharge unit is in a discharge state at least at one moment;
控制模块1002，还可以配置成用于：The control module 1002 can also be configured to:
根据电路控制时序图，对状态切换单元的状态、放电单元的状态以及至少两个直流输出单元的输出电流以及输出电压进行控制。According to the circuit control timing diagram, the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of at least two direct current output units are controlled.
可选地，控制模块1002，还可以配置成用于：Optionally, the control module 1002 may also be configured to:
若直流输出单元的数量大于2，则将直流输出单元划分为至少一个直流输出单元组；If the number of DC output units is greater than 2, divide the DC output units into at least one DC output unit group;
根据电路控制时序图，对状态切换单元的状态、放电单元的状态进行控制，并分别对各直流输出单元组中的直流输出单元的输出电流以及输出电压进行控制；According to the circuit control timing diagram, the state of the state switching unit and the state of the discharge unit are controlled, and the output current and output voltage of the DC output units in each DC output unit group are respectively controlled;
根据电路控制时序图，对状态切换单元的状态、放电单元的状态进行控制，并将各直流输出单元组分别作为直流输出单元，对各直流输出单元组的输出电流以及输出电压进行控制。According to the circuit control timing diagram, the state of the state switching unit and the state of the discharge unit are controlled, and each DC output unit group is used as a DC output unit to control the output current and output voltage of each DC output unit group.
可选地，状态切换单元可以包括：第一开关、第二开关、第三开关；电路控制时序图可以配置成用于指示：第一开关在至少一个时刻的断开或闭合状态、第二开关在至少一个时刻的断开或闭合状态、第三开关在至少一个时刻的断开或闭合状态。Optionally, the state switching unit may include: a first switch, a second switch, and a third switch; the circuit control timing diagram may be configured to indicate: the open or closed state of the first switch at at least one moment, the second switch The open or closed state at at least one moment, the open or closed state of the third switch at at least one moment.
可选地，至少两个直流输出单元可以包括：第一直流输出单元和第二直流输出单元；电路控制时序图可以配置成用于指示：第一直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态，以及第二直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态。Optionally, the at least two DC output units may include: a first DC output unit and a second DC output unit; the circuit control timing diagram may be configured to indicate: the output current and the output voltage of the first DC output unit at The change state at least one moment, and the change state of the output current and the output voltage of the second DC output unit at at least one moment.
可选地，控制模块，还可以配置成用于1002：Optionally, the control module can also be configured for 1002:
根据电路控制时序图，控制第一开关在第二时刻后断开；According to the circuit control timing diagram, the first switch is controlled to be disconnected after the second moment;
根据电路控制时序图，控制第二开关在第四时刻后或第六时刻前断开，第六时刻晚于第四时刻；According to the circuit control timing diagram, the second switch is controlled to be disconnected after the fourth moment or before the sixth moment, and the sixth moment is later than the fourth moment;
根据电路控制时序图，控制第三开关在第四时刻后闭合；According to the circuit control timing diagram, the third switch is controlled to be closed after the fourth moment;
根据电路控制时序图，控制放电单元在第三时刻至第四时刻之间闭合；第四时刻晚于第三时刻；According to the circuit control timing diagram, the discharge unit is controlled to be closed between the third moment and the fourth moment; the fourth moment is later than the third moment;
根据电路控制时序图，控制第二直流输出单元的输出电流从第一时刻至第二时刻降低至零，在第二时刻至第五时刻保持为零，从第五时刻至第六时刻升高至目标电流值，并从第六时刻起保持不变；第六时刻晚于第五时刻，第五时刻晚于第二时刻，第二时刻晚于第一时刻；According to the circuit control timing diagram, the output current of the second DC output unit is controlled to decrease from the first moment to the second moment to zero, to keep it at zero from the second moment to the fifth moment, and to increase from the fifth moment to the sixth moment to The target current value is kept constant from the sixth moment; the sixth moment is later than the fifth moment, the fifth moment is later than the second moment, and the second moment is later than the first moment;
根据电路控制时序图，控制第一直流输出单元的输出电压在第六时刻至第七时刻降低至第一目标电压值，第一目标电压值基于直流输出单元的数量得到；According to the circuit control timing diagram, the output voltage of the first DC output unit is controlled to decrease to a first target voltage value from the sixth moment to the seventh moment, and the first target voltage value is obtained based on the number of DC output units;
根据电路控制时序图，控制第二直流输出单元的输出电压在第三时刻至第四时刻降低至零，在第四时刻至第六时刻保持为零，从第六时刻至第七时刻升高至第一目标电压值。According to the circuit control timing diagram, the output voltage of the second direct current output unit is controlled to decrease to zero from the third moment to the fourth moment, to remain at zero from the fourth moment to the sixth moment, and to increase from the sixth moment to the seventh moment to The first target voltage value.
可选地，控制模块1002，还可以配置成用于：Optionally, the control module 1002 may also be configured to:
根据电路控制时序图，控制第一开关在第五时刻后闭合；According to the circuit control timing diagram, the first switch is controlled to be closed after the fifth moment;
根据电路控制时序图，控制第二开关从第三时刻起闭合；According to the circuit control timing diagram, the second switch is controlled to be closed from the third moment;
根据电路控制时序图，控制第三开关在第二时刻后或第四时刻前断开；第四时刻晚于第二时刻；According to the circuit control sequence diagram, the third switch is controlled to be disconnected after the second moment or before the fourth moment; the fourth moment is later than the second moment;
根据电路控制时序图，控制第二直流输出单元的输出电流从第一时刻至第二时刻降低至零，在第二时刻至第五时刻保持为零，从第五时刻起升高至目标电流值，并保持不变；According to the circuit control timing diagram, the output current of the second DC output unit is controlled to decrease to zero from the first moment to the second moment, remain at zero from the second moment to the fifth moment, and rise to the target current value from the fifth moment , and remain unchanged;
根据电路控制时序图，控制第一直流输出单元的输出电压在第一时刻至第二时刻内升高至到第二目标电压值，并从第二时刻起保持不变；第二目标电压值基于直流输出单元的数量得到；According to the circuit control timing diagram, control the output voltage of the first DC output unit to increase to the second target voltage value from the first moment to the second moment, and keep it unchanged from the second moment; the second target voltage value Obtained based on the number of DC output units;
根据电路控制时序图，控制第二直流输出单元的输出电压在第一时刻至第二时刻降低至零，在第二时刻至第四时刻保持为零，从第四时刻至第五时刻升高至第二目标电压值。According to the circuit control timing diagram, the output voltage of the second direct current output unit is controlled to decrease to zero from the first moment to the second moment, to remain at zero from the second moment to the fourth moment, and to increase from the fourth moment to the fifth moment to The second target voltage value.
可选地，控制模块1002，还可以配置成用于：Optionally, the control module 1002 may also be configured to:
根据电路控制时序图，控制放电单元在第二时刻后至第三时刻前闭合；第三时刻晚于第二时刻。According to the circuit control timing diagram, the discharge unit is controlled to be closed after the second moment and before the third moment; the third moment is later than the second moment.
上述装置用于执行前述实施例提供的方法，其实现原理和技术效果类似，在此不再赘述。The above-mentioned apparatus is used to execute the methods provided in the foregoing embodiments, and its implementation principles and technical effects are similar, and details are not repeated here.
以上这些模块可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个特定集成电路(Application Specific Integrated Circuit，简称ASIC)，或，一个或多个微处理器(digital singnal processor，简称DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，简称FPGA)等。再如，当以上某个模块通过处理元件调度程序代码的形式实现时，该处理元件可以是通用处理器，例如中央处理器(Central Processing Unit，简称CPU)或其它可以调用程序代码的处理器。再如，这些模块可以集成在一起，以片上***(system-on-a-chip，简称SOC)的形式实现。The above modules may be one or more integrated circuits configured to implement the above method, for example: one or more specific integrated circuits (Application Specific Integrated Circuit, referred to as ASIC), or, one or more microprocessors (digital singnal processor, DSP for short), or, one or more Field Programmable Gate Arrays (Field Programmable Gate Array, FPGA for short), etc. For another example, when one of the above modules is implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a central processing unit (Central Processing Unit, referred to as CPU) or other processors that can call program codes. For another example, these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC for short).
图11为本申请实施例提供的一种控制器的结构示意图，该控制器可以集成于控制终端设备或者控制终端设备的芯片，具备数据处理功能的计算设备。FIG. 11 is a schematic structural diagram of a controller provided by an embodiment of the present application. The controller may be integrated into a control terminal device or a chip of a control terminal device, or a computing device with a data processing function.
该控制器可以包括：处理器1101、存储介质1102和总线1103。The controller may include: a processor 1101 , a storage medium 1102 and a bus 1103 .
存储介质1102存储有处理器可执行的机器可读指令，当控制器运行时，处理器1101与存储介质1102之间通过总线1103通信，处理器执行机器可读指令，以执行上述实施例提供的串并联切换电路控制方法步骤。具体实现方式和技术效果类似，这里不再赘述。The storage medium 1102 stores machine-readable instructions executable by the processor. When the controller is running, the processor 1101 communicates with the storage medium 1102 through the bus 1103, and the processor executes the machine-readable instructions to implement the above-mentioned embodiments. Steps of a control method for a series-parallel switching circuit. The specific implementation manner and technical effect are similar, and will not be repeated here.
可选地，本申请还提供一种程序产品，例如计算机可读存储介质，包括程序，该程序在被处理器执行时用于执行上述方法实施例。Optionally, the present application further provides a program product, such as a computer-readable storage medium, including a program, and the program is used to execute the foregoing method embodiments when executed by a processor.
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个***，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物 理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(英文：processor)执行本申请各个实施例所述方法的部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(英文：Read-Only Memory，简称：ROM)、随机存取存储器(英文：Random Access Memory，简称：RAM)、磁碟或者光盘等各种可以存储程序代码的介质。The above-mentioned integrated units implemented in the form of software functional units may be stored in a computer-readable storage medium. The above-mentioned software functional units are stored in a storage medium, and include several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) or a processor (English: processor) to execute the functions described in various embodiments of the present application. part of the method. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (English: Read-Only Memory, abbreviated: ROM), random access memory (English: Random Access Memory, abbreviated: RAM), magnetic disk or optical disc, etc. Various media that can store program code.
工业实用性Industrial Applicability
本申请提供了串并联切换电路控制方法、装置、控制器及存储介质，涉及电力电子技术领域。该方法包括：获取预先生成的电路控制时序图；电路控制时序图配置成用于指示状态切换单元在至少一个时刻的状态，以及指示至少两个直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态；根据电路控制时序图，对状态切换单元的状态以及至少两个直流输出单元的输出电流以及输出电压进行控制，并对放电单元的状态进行控制，以将至少两个直流输出单元从并联状态切换至串联状态，或，从串联状态切换至并联状态。本方案不需要停机也能够实现在线串并联切换，解决了相关技术中串并联切换时存在输出功率中断导致不能正常充电的问题，满足不同负载的正常充电需求。The application provides a control method, device, controller and storage medium for a series-parallel switching circuit, and relates to the technical field of power electronics. The method includes: obtaining a pre-generated circuit control timing diagram; the circuit control timing diagram is configured to indicate the state of the state switching unit at at least one moment, and indicate the output current and output voltage of at least two direct current output units at at least one moment change state; according to the circuit control timing diagram, the state of the state switching unit and the output current and output voltage of at least two DC output units are controlled, and the state of the discharge unit is controlled to switch at least two DC output units from Switch from a parallel state to a series state, or, from a series state to a parallel state. This solution can realize online series-parallel switching without shutting down, solves the problem in the related art that the output power is interrupted during the series-parallel switching, resulting in abnormal charging, and meets the normal charging needs of different loads.
此外，可以理解的是，本申请的串并联切换电路控制方法、装置、控制器及存储介质是可以重现的，并且可以用在多种工业应用中。例如，本申请的串并联切换电路控制方法、装置、控制器及存储介质可以用于电力电子技术领域。In addition, it can be understood that the series-parallel switching circuit control method, device, controller and storage medium of the present application are reproducible and can be used in various industrial applications. For example, the series-parallel switching circuit control method, device, controller and storage medium of the present application can be used in the field of power electronics technology.

Claims (18)

  1. 一种串并联切换电路控制方法，其特征在于，应用于控制器，所述控制器与串并联切换电路连接，所述串并联切换电路包括：至少两个直流输出单元、多个状态切换单元以及放电单元，所述直流输出单元通过所述状态切换单元与输出主路连接，所述放电单元与所述直流输出单元连接；所述方法包括：A control method for a series-parallel switching circuit, characterized in that it is applied to a controller, and the controller is connected to the series-parallel switching circuit, and the series-parallel switching circuit includes: at least two DC output units, a plurality of state switching units, and A discharge unit, the DC output unit is connected to the output main circuit through the state switching unit, and the discharge unit is connected to the DC output unit; the method includes:
    获取预先生成的电路控制时序图；其中，所述电路控制时序图配置成用于指示所述状态切换单元在至少一个时刻的断开或闭合状态，以及指示所述至少两个直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态；Obtaining a pre-generated circuit control timing diagram; wherein, the circuit control timing diagram is configured to indicate the open or closed state of the state switching unit at at least one moment, and indicate the output of the at least two DC output units The change state of the current and the output voltage at at least one moment;
    根据所述电路控制时序图，对所述状态切换单元的状态以及所述至少两个直流输出单元的输出电流以及输出电压进行控制，并对所述放电单元的状态进行控制，以将所述至少两个直流输出单元从并联状态切换至串联状态，或，从所述串联状态切换至所述并联状态。According to the circuit control timing diagram, the state of the state switching unit and the output current and output voltage of the at least two DC output units are controlled, and the state of the discharge unit is controlled, so that the at least The two DC output units are switched from the parallel state to the series state, or from the series state to the parallel state.
  2. 根据权利要求1所述的方法，其特征在于，所述电路控制时序图还配置成用于指示所述放电单元在至少一个时刻是否处于放电状态；The method according to claim 1, wherein the circuit control timing diagram is further configured to indicate whether the discharge unit is in a discharge state at least at one moment;
    所述根据所述电路控制时序图，对所述状态切换单元的状态以及所述至少两个直流输出单元的输出电流以及输出电压进行控制，包括：The controlling the state of the state switching unit and the output current and output voltage of the at least two DC output units according to the circuit control sequence diagram includes:
    根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态以及所述至少两个直流输出单元的输出电流以及输出电压进行控制。According to the circuit control timing diagram, the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of the at least two direct current output units are controlled.
  3. 根据权利要求2所述的方法，其特征在于，所述根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态以及所述至少两个直流输出单元的输出电流以及输出电压进行控制，包括：The method according to claim 2, characterized in that, according to the circuit control timing diagram, the state of the state switching unit, the state of the discharge unit and the output current of the at least two DC output units and output voltage controls, including:
    若所述直流输出单元的数量大于2，则将所述直流输出单元划分为至少一个直流输出单元组；If the number of the DC output units is greater than 2, then divide the DC output units into at least one DC output unit group;
    根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态进行控制，并分别对各所述直流输出单元组中的直流输出单元的输出电流以及输出电压进行控制；According to the circuit control sequence diagram, the state of the state switching unit and the state of the discharge unit are controlled, and the output current and output voltage of the DC output units in each of the DC output unit groups are respectively controlled;
    根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态进行控制，并将所述各直流输出单元组分别作为直流输出单元，对所述各直流输出单元组的输出电流以及输出电压进行控制。According to the circuit control timing diagram, the state of the state switching unit and the state of the discharge unit are controlled, and the groups of DC output units are respectively used as DC output units, and the groups of DC output units are respectively used as DC output units. The output current as well as the output voltage are controlled.
  4. 根据权利要求2或3所述的方法，其特征在于，所述状态切换单元包括：第一开关、第二开关、第三开关；所述电路控制时序图配置成用于指示：所述第一开关在至少一个时刻的断开或闭合状态、所述第二开关在至少一个时刻的断开或闭合状态、所述第三开关在至少一个时刻的断开或闭合状态。The method according to claim 2 or 3, wherein the state switching unit comprises: a first switch, a second switch, and a third switch; the circuit control timing diagram is configured to indicate: the first The open or closed state of the switch at at least one moment, the open or closed state of the second switch at at least one moment, and the open or closed state of the third switch at at least one moment.
  5. 根据权利要求4所述的方法，其特征在于，所述至少两个直流输出单元包括：第一直流输出单元和第二直流输出单元；所述电路控制时序图配置成用于指示：所述第一直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态，以及所述第二直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态。The method according to claim 4, wherein the at least two DC output units comprise: a first DC output unit and a second DC output unit; the circuit control timing diagram is configured to indicate: the The change state of the output current and output voltage of the first DC output unit at at least one moment, and the change state of the output current and output voltage of the second DC output unit at at least one moment.
  6. 根据权利要求5所述的方法，其特征在于，所述根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态以及所述两个直流输出单元的输出电流以及输出电压进行控制，包括：The method according to claim 5, characterized in that, according to the circuit control timing diagram, the state of the state switching unit, the state of the discharge unit, the output current of the two DC output units and The output voltage is controlled by:
    根据所述电路控制时序图，控制所述第一开关在第二时刻后断开；According to the circuit control timing diagram, control the first switch to turn off after the second moment;
    根据所述电路控制时序图，控制所述第二开关在第四时刻后或第六时刻前断开，所述第六时刻晚于所述第四时刻；According to the circuit control timing diagram, the second switch is controlled to be turned off after the fourth moment or before the sixth moment, and the sixth moment is later than the fourth moment;
    根据所述电路控制时序图，控制所述第三开关在所述第四时刻后闭合；According to the circuit control timing diagram, controlling the third switch to close after the fourth moment;
    根据所述电路控制时序图，控制所述放电单元在第三时刻至所述第四时刻之间闭合；所述第四时刻晚于所述第三时刻；According to the circuit control timing diagram, the discharge unit is controlled to be closed between the third moment and the fourth moment; the fourth moment is later than the third moment;
    根据所述电路控制时序图，控制所述第二直流输出单元的输出电流从第一时刻至所述第二时刻降低至零，在所述第二时刻至第五时刻保持为零，从所述第五时刻至第六时刻升高至目标电流值，并从所述第六时刻起保持不变；所述第六时刻晚于所述第五时刻，所述第五时刻晚于所述第二时刻，所述第二时刻晚于所述第一时刻；According to the circuit control timing diagram, the output current of the second DC output unit is controlled to decrease to zero from the first moment to the second moment, and to remain at zero from the second moment to the fifth moment, and from the From the fifth moment to the sixth moment, it increases to the target current value and remains unchanged from the sixth moment; the sixth moment is later than the fifth moment, and the fifth moment is later than the second time, the second time being later than the first time;
    根据所述电路控制时序图，控制所述第一直流输出单元的输出电压在所述第六时刻至第七时刻降低至第一目标电压值，所述第一目标电压值基于所述直流输出单元的数量得到；According to the circuit control timing diagram, the output voltage of the first DC output unit is controlled to decrease to a first target voltage value at the sixth moment to the seventh moment, and the first target voltage value is based on the DC output The number of units is obtained;
    根据所述电路控制时序图，控制所述第二直流输出单元的输出电压在所述第三时刻至所述第四时刻降低至零，在所述第四时刻至所述第六时刻保持为零，从所述第六时刻至所述第七时刻升高至所述第一 目标电压值。According to the circuit control timing diagram, the output voltage of the second DC output unit is controlled to decrease to zero from the third moment to the fourth moment, and to remain at zero from the fourth moment to the sixth moment , increasing to the first target voltage value from the sixth moment to the seventh moment.
  7. 根据权利要求5所述的方法，其特征在于，所述根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态以及所述两个直流输出单元的输出电流以及输出电压进行控制，包括：The method according to claim 5, characterized in that, according to the circuit control timing diagram, the state of the state switching unit, the state of the discharge unit, the output current of the two DC output units and The output voltage is controlled by:
    根据所述电路控制时序图，控制所述第一开关在第五时刻后闭合；According to the circuit control timing diagram, control the first switch to close after the fifth moment;
    根据所述电路控制时序图，控制所述第二开关从第三时刻起闭合；According to the circuit control timing diagram, control the second switch to close from the third moment;
    根据所述电路控制时序图，控制所述第三开关在第二时刻后或第四时刻前断开；所述第四时刻晚于所述第二时刻；According to the circuit control timing diagram, the third switch is controlled to be turned off after the second moment or before the fourth moment; the fourth moment is later than the second moment;
    根据所述电路控制时序图，控制所述第二直流输出单元的输出电流从第一时刻至所述第二时刻降低至零，在所述第二时刻至所述第五时刻保持为零，从所述第五时刻起升高至目标电流值，并保持不变；According to the circuit control timing diagram, the output current of the second DC output unit is controlled to decrease from the first moment to the second moment to zero, and to remain at zero from the second moment to the fifth moment, from From the fifth moment, it rises to the target current value and remains unchanged;
    根据所述电路控制时序图，控制所述第一直流输出单元的输出电压在所述第一时刻至所述第二时刻内升高至到第二目标电压值，并从所述第二时刻起保持不变；所述第二目标电压值基于直流输出单元的数量得到；According to the circuit control timing diagram, the output voltage of the first DC output unit is controlled to rise to the second target voltage value from the first moment to the second moment, and from the second moment remain unchanged; the second target voltage value is obtained based on the number of DC output units;
    根据所述电路控制时序图，控制所述第二直流输出单元的输出电压在所述第一时刻至所述第二时刻降低至零，在所述第二时刻至所述第四时刻保持为零，从所述第四时刻至所述第五时刻升高至所述第二目标电压值。According to the circuit control timing diagram, the output voltage of the second DC output unit is controlled to decrease to zero from the first moment to the second moment, and to remain at zero from the second moment to the fourth moment , increasing to the second target voltage value from the fourth moment to the fifth moment.
  8. 根据权利要求7所述的方法，其特征在于，所述根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态以及所述两个直流输出单元的输出电流以及输出电压进行控制，还包括：The method according to claim 7, characterized in that, according to the circuit control timing diagram, the state of the state switching unit, the state of the discharge unit and the output currents of the two DC output units and The output voltage is controlled and also includes:
    根据所述电路控制时序图，控制所述放电单元在所述第二时刻后至所述第三时刻前闭合；所述第三时刻晚于所述第二时刻。According to the circuit control timing diagram, the discharge unit is controlled to be closed after the second moment and before the third moment; the third moment is later than the second moment.
  9. 一种串并联切换电路控制装置，其特征在于，应用于控制器，所述控制器与串并联切换电路连接，所述串并联切换电路包括：至少两个直流输出单元、多个状态切换单元以及放电单元，所述直流输出单元通过所述状态切换单元与输出主路连接，所述放电单元与所述直流输出单元连接；所述装置包括：获取模块、控制模块；A series-parallel switching circuit control device, characterized in that it is applied to a controller, the controller is connected to the series-parallel switching circuit, and the series-parallel switching circuit includes: at least two DC output units, a plurality of state switching units, and A discharge unit, the DC output unit is connected to the output main circuit through the state switching unit, and the discharge unit is connected to the DC output unit; the device includes: an acquisition module and a control module;
    所述获取模块，配置成用于获取预先生成的电路控制时序图；其中，所述电路控制时序图配置成用于指示所述状态切换单元在至少一个时刻的断开或闭合状态，以及指示所述至少两个直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态；The acquisition module is configured to acquire a pre-generated circuit control timing diagram; wherein the circuit control timing diagram is configured to indicate the open or closed state of the state switching unit at least one moment, and indicate the The output current of the at least two DC output units and the change state of the output voltage at at least one moment;
    所述控制模块，配置成用于根据所述电路控制时序图，对所述状态切换单元的状态以及所述至少两个直流输出单元的输出电流以及输出电压进行控制，并对所述放电单元的状态进行控制，以将所述至少两个直流输出单元从并联状态切换至串联状态，或，从所述串联状态切换至所述并联状态。The control module is configured to control the state of the state switching unit and the output current and output voltage of the at least two DC output units according to the circuit control timing diagram, and control the output current and output voltage of the discharge unit. The state is controlled to switch the at least two DC output units from a parallel state to a series state, or from the series state to the parallel state.
  10. 根据权利要求9所述的串并联切换电路控制装置，其特征在于，所述电路控制时序图还配置成用于指示所述放电单元在至少一个时刻是否处于放电状态；The control device for a series-parallel switching circuit according to claim 9, wherein the circuit control timing diagram is further configured to indicate whether the discharge unit is in a discharge state at least at one moment;
    所述控制模块，还配置成用于：The control module is further configured to:
    根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态以及所述至少两个直流输出单元的输出电流以及输出电压进行控制。According to the circuit control timing diagram, the state of the state switching unit, the state of the discharge unit, and the output current and output voltage of the at least two direct current output units are controlled.
  11. 根据权利要求10所述的串并联切换电路控制装置，其特征在于，所述控制模块，还配置成用于：The series-parallel switching circuit control device according to claim 10, wherein the control module is further configured to:
    若所述直流输出单元的数量大于2，则将所述直流输出单元划分为至少一个直流输出单元组；If the number of the DC output units is greater than 2, then divide the DC output units into at least one DC output unit group;
    根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态进行控制，并分别对各所述直流输出单元组中的直流输出单元的输出电流以及输出电压进行控制；According to the circuit control sequence diagram, the state of the state switching unit and the state of the discharge unit are controlled, and the output current and output voltage of the DC output units in each of the DC output unit groups are respectively controlled;
    根据所述电路控制时序图，对所述状态切换单元的状态、所述放电单元的状态进行控制，并将所述各直流输出单元组分别作为直流输出单元，对所述各直流输出单元组的输出电流以及输出电压进行控制。According to the circuit control timing diagram, the state of the state switching unit and the state of the discharge unit are controlled, and the groups of DC output units are respectively used as DC output units, and the groups of DC output units are respectively used as DC output units. The output current as well as the output voltage are controlled.
  12. 根据权利要求10或11所述的串并联切换电路控制装置，其特征在于，所述状态切换单元包括：第一开关、第二开关、第三开关；所述电路控制时序图配置成用于指示：所述第一开关在至少一个时刻的断开或闭合状态、所述第二开关在至少一个时刻的断开或闭合状态、所述第三开关在至少一个时刻的断开或闭合状态。The series-parallel switching circuit control device according to claim 10 or 11, wherein the state switching unit comprises: a first switch, a second switch, and a third switch; the circuit control timing diagram is configured to indicate : the open or closed state of the first switch at at least one moment, the open or closed state of the second switch at at least one moment, the open or closed state of the third switch at at least one moment.
  13. 根据权利要求12所述的串并联切换电路控制装置，其特征在于，所述至少两个直流输出单元包括：第一直流输出单元和第二直流输出单元；所述电路控制时序图配置成用于指示：所述第一直流输出单元的输出电流以及输出电压在至少一个时刻的变化状态，以及所述第二直流输出单元的输出电流以 及输出电压在至少一个时刻的变化状态。The series-parallel switching circuit control device according to claim 12, wherein the at least two DC output units include: a first DC output unit and a second DC output unit; the circuit control timing diagram is configured to use Indicating: the change state of the output current and output voltage of the first DC output unit at at least one moment, and the change state of the output current and output voltage of the second DC output unit at at least one moment.
  14. 根据权利要求13所述的串并联切换电路控制装置，其特征在于，所述控制模块，还配置成用于：The series-parallel switching circuit control device according to claim 13, wherein the control module is further configured to:
    根据所述电路控制时序图，控制所述第一开关在第二时刻后断开；According to the circuit control timing diagram, control the first switch to turn off after the second moment;
    根据所述电路控制时序图，控制所述第二开关在第四时刻后或第六时刻前断开，所述第六时刻晚于所述第四时刻；According to the circuit control timing diagram, the second switch is controlled to be turned off after the fourth moment or before the sixth moment, and the sixth moment is later than the fourth moment;
    根据所述电路控制时序图，控制所述第三开关在所述第四时刻后闭合；According to the circuit control timing diagram, controlling the third switch to close after the fourth moment;
    根据所述电路控制时序图，控制所述放电单元在第三时刻至所述第四时刻之间闭合；所述第四时刻晚于所述第三时刻；According to the circuit control timing diagram, the discharge unit is controlled to be closed between the third moment and the fourth moment; the fourth moment is later than the third moment;
    根据所述电路控制时序图，控制所述第二直流输出单元的输出电流从第一时刻至所述第二时刻降低至零，在所述第二时刻至第五时刻保持为零，从所述第五时刻至第六时刻升高至目标电流值，并从所述第六时刻起保持不变；所述第六时刻晚于所述第五时刻，所述第五时刻晚于所述第二时刻，所述第二时刻晚于所述第一时刻；According to the circuit control timing diagram, the output current of the second DC output unit is controlled to decrease to zero from the first moment to the second moment, and to remain at zero from the second moment to the fifth moment, and from the From the fifth moment to the sixth moment, it increases to the target current value and remains unchanged from the sixth moment; the sixth moment is later than the fifth moment, and the fifth moment is later than the second time, the second time being later than the first time;
    根据所述电路控制时序图，控制所述第一直流输出单元的输出电压在所述第六时刻至第七时刻降低至第一目标电压值，所述第一目标电压值基于所述直流输出单元的数量得到；According to the circuit control timing diagram, the output voltage of the first DC output unit is controlled to decrease to a first target voltage value at the sixth moment to the seventh moment, and the first target voltage value is based on the DC output The number of units is obtained;
    根据所述电路控制时序图，控制所述第二直流输出单元的输出电压在所述第三时刻至所述第四时刻降低至零，在所述第四时刻至所述第六时刻保持为零，从所述第六时刻至所述第七时刻升高至所述第一目标电压值。According to the circuit control timing diagram, the output voltage of the second DC output unit is controlled to decrease to zero from the third moment to the fourth moment, and to remain at zero from the fourth moment to the sixth moment , increasing to the first target voltage value from the sixth moment to the seventh moment.
  15. 根据权利要求13所述的串并联切换电路控制装置，其特征在于，所述控制模块，还配置成用于：The series-parallel switching circuit control device according to claim 13, wherein the control module is further configured to:
    根据所述电路控制时序图，控制所述第一开关在第五时刻后闭合；According to the circuit control timing diagram, control the first switch to close after the fifth moment;
    根据所述电路控制时序图，控制所述第二开关从第三时刻起闭合；According to the circuit control timing diagram, control the second switch to close from the third moment;
    根据所述电路控制时序图，控制所述第三开关在第二时刻后或第四时刻前断开；所述第四时刻晚于所述第二时刻；According to the circuit control timing diagram, the third switch is controlled to be turned off after the second moment or before the fourth moment; the fourth moment is later than the second moment;
    根据所述电路控制时序图，控制所述第二直流输出单元的输出电流从第一时刻至所述第二时刻降低至零，在所述第二时刻至所述第五时刻保持为零，从所述第五时刻起升高至目标电流值，并保持不变；According to the circuit control timing diagram, the output current of the second DC output unit is controlled to decrease from the first moment to the second moment to zero, and to remain at zero from the second moment to the fifth moment, from From the fifth moment, it rises to the target current value and remains unchanged;
    根据所述电路控制时序图，控制所述第一直流输出单元的输出电压在所述第一时刻至所述第二时刻内升高至到第二目标电压值，并从所述第二时刻起保持不变；所述第二目标电压值基于直流输出单元的数量得到；According to the circuit control timing diagram, the output voltage of the first DC output unit is controlled to rise to the second target voltage value from the first moment to the second moment, and from the second moment remain unchanged; the second target voltage value is obtained based on the number of DC output units;
    根据所述电路控制时序图，控制所述第二直流输出单元的输出电压在所述第一时刻至所述第二时刻降低至零，在所述第二时刻至所述第四时刻保持为零，从所述第四时刻至所述第五时刻升高至所述第二目标电压值。According to the circuit control timing diagram, the output voltage of the second DC output unit is controlled to decrease to zero from the first moment to the second moment, and to remain at zero from the second moment to the fourth moment , increasing to the second target voltage value from the fourth moment to the fifth moment.
  16. 根据权利要求15所述的串并联切换电路控制装置，其特征在于，所述控制模块，还配置成用于：The series-parallel switching circuit control device according to claim 15, wherein the control module is further configured to:
    根据所述电路控制时序图，控制所述放电单元在所述第二时刻后至所述第三时刻前闭合；所述第三时刻晚于所述第二时刻。According to the circuit control timing diagram, the discharge unit is controlled to be closed after the second moment and before the third moment; the third moment is later than the second moment.
  17. 一种控制器，其特征在于，包括：处理器、存储介质和总线，所述存储介质存储有所述处理器可执行的机器可读指令，当控制器运行时，所述处理器与所述存储介质之间通过总线通信，所述处理器执行所述机器可读指令，以执行根据权利要求1-8任一所述方法的步骤。A controller, characterized in that it includes: a processor, a storage medium and a bus, the storage medium stores machine-readable instructions executable by the processor, and when the controller is running, the processor and the The storage media communicate with each other through a bus, and the processor executes the machine-readable instructions to perform the steps of the method according to any one of claims 1-8.
  18. 一种计算机可读存储介质，其特征在于，所述存储介质上存储有计算机程序，所述计算机程序被处理器运行时执行根据权利要求1-8任一所述方法的步骤。A computer-readable storage medium, wherein a computer program is stored on the storage medium, and when the computer program is run by a processor, the steps of the method according to any one of claims 1-8 are executed.
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