CN114726036A - Multi-path bidirectional variable-voltage control device and controller - Google Patents
Multi-path bidirectional variable-voltage control device and controller Download PDFInfo
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- CN114726036A CN114726036A CN202210343118.9A CN202210343118A CN114726036A CN 114726036 A CN114726036 A CN 114726036A CN 202210343118 A CN202210343118 A CN 202210343118A CN 114726036 A CN114726036 A CN 114726036A
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- 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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00308—Overvoltage protection
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- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00309—Overheat or overtemperature protection
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- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- 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
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- 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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- 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
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- 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
- H02J2207/40—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries adapted for charging from various sources, e.g. AC, DC or multivoltage
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a multi-path bidirectional variable voltage control device and a controller, wherein the device comprises a state detection module, an LLC bidirectional control module, a boost module and a buck voltage reduction module, and the state detection module is used for detecting the working state; the LLC bidirectional control module is used for performing forward voltage conversion control on the LLC bidirectional voltage transformation circuit so as to convert the first direct current into second direct current and charge the charging and discharging battery; or the second direct current output by charging the charging and discharging battery is converted into the first direct current; the boost module is used for performing voltage boost conversion on the boost circuit so as to convert third direct current into second direct current and charge the charging and discharging battery; the buck voltage reduction module controls the buck voltage reduction circuit and converts the second direct current output by the charging and discharging battery into fourth direct current. The management and control of each charge-discharge loop are realized through each module in the multi-path bidirectional variable voltage control device, the overall circuit coordination is relatively good, and the overall circuit fault rate is low.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to a multi-path bidirectional variable voltage control device and a controller.
Background
The existing mobile energy storage equipment, such as a mobile inverter, can provide a power supply for the electric equipment by outputting a power supply through a lithium battery, and after the power supply of the lithium battery is used up, the lithium battery pack needs to be charged through an external power supply. The conversion of the charging and discharging direct-current power supply voltage and the inversion switching of the voltage are key circuits of the mobile energy storage equipment.
When such electronic devices are used outdoors, it is usually necessary to satisfy multiple voltage inputs and outputs, for example, outputting low-voltage direct current to power the electronic devices, or outputting commercial alternating current to power the electrical devices. During charging, multiple charging modes also need to be supported. For example, the solar energy can be charged by alternating current or solar energy to meet the outdoor application requirement
In the prior art, each charging circuit power supply loop is realized through an independent circuit, the coordination is relatively poor, and the overall circuit has more faults.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a multi-path bidirectional voltage transformation control device and a controller.
On one hand, to achieve the above object, an embodiment of the present invention provides a multi-path bidirectional voltage transformation control device, including:
the state detection module is used for detecting the working states of the charging and discharging batteries and commercial power alternating current;
the LLC bidirectional control module is connected with the state detection module and used for performing forward voltage conversion control on the LLC bidirectional voltage transformation circuit according to a detection result of the state detection module so as to convert the first direct current into a second direct current and charge a charging and discharging battery; or reverse voltage conversion control to convert the second direct current output by the charging and discharging battery into the first direct current;
the boost module is connected with the state detection module and used for performing voltage boost conversion on the boost circuit according to the detection result of the state detection module so as to convert third direct current into second direct current and charge the charge and discharge battery;
and the buck voltage reduction module is connected with the state detection module and used for performing voltage reduction conversion on the buck voltage reduction circuit according to the detection result of the state detection module so as to convert the second direct current output by the charge-discharge battery into fourth direct current.
Further, according to an embodiment of the present invention, the multi-path bidirectional voltage transformation control apparatus further includes an ac/dc inverter module, connected to the state detection module, for performing voltage conversion control on the ac/dc conversion circuit according to a detection result of the state detection module, so as to convert the first direct current into an alternating current or convert the alternating current into the first direct current.
Further, according to an embodiment of the present invention, the state detection module includes:
and the voltage detection module is used for collecting the voltage of the charge and discharge battery through the first voltage sampling circuit and collecting the voltage value of the alternating current through the second voltage sampling circuit.
Further, according to an embodiment of the present invention, the state detection module further includes:
the temperature detection module is used for collecting the temperature of the charge and discharge battery through the first temperature sampling circuit and collecting the temperature value of the LLC bidirectional voltage transformation circuit through the second temperature sampling circuit.
Further, according to an embodiment of the present invention, the state detection module further includes:
the key module is used for acquiring whether the power key and/or the AC key are pressed down.
Further, according to an embodiment of the present invention, the state detection module further includes:
a communication module for communicating with the charge and discharge battery.
Further, according to an embodiment of the present invention, the state detection module is further configured to convert the operating state from the standby state to the charging state when it is determined that the power key is pressed and the communication is normal and the voltage value of the alternating current is greater than 80V;
or when the power supply key is pressed, the communication is normal, the voltage value of the alternating current is larger than that of the power supply key and the AC key is pressed, the working state is converted into a discharging state from a standby state;
or when the commercial power is disconnected or the communication is interrupted or the battery is over-temperature, the working state is converted from the charging state to the standby state;
or when the AC key is pressed for a long time or the communication is interrupted or the battery power is less than 10% or the battery temperature is more than 70 ℃, the working state is converted from the discharging state to the standby state.
Further, according to an embodiment of the present invention, the LLC bidirectional control module includes:
the forward charging module is used for controlling the LLC bidirectional voltage transformation circuit to perform forward voltage conversion control so as to convert the first direct current into second direct current and charge the charging and discharging battery when the battery is judged to be overvoltage-free, the bus is overvoltage-free and the charging and discharging battery is not over-temperature in a charging state; when the battery overvoltage and/or the bus overvoltage and/or the charging and discharging battery over-temperature are judged, the voltage conversion control is stopped, and the battery enters a locking state;
the reverse discharge module is used for controlling the LLC bidirectional transformation circuit to perform reverse voltage conversion control so as to convert the second direct current into the first direct current when the battery voltage is judged to be greater than 40V or the alternating current voltage is judged to be less than 50V in a discharge state; and when the battery is undervoltage and/or the bus is overvoltage and/or the over-temperature of the charge-discharge battery is judged and/or the discharge is forbidden, stopping the voltage conversion control and entering a locking state.
Further, according to an embodiment of the present invention, the boost module is further configured to, in a charging state, control the boost circuit to perform voltage conversion control when it is determined that the third dc voltage is greater than 12V, so as to convert the third dc voltage into a second dc voltage for charging the charging/discharging battery; and when the battery overvoltage and/or the bus overvoltage and/or the charging and discharging battery over-temperature are judged, the voltage conversion control is stopped, and the locking state is entered.
The buck voltage reduction module is also used for controlling the buck voltage reduction circuit to carry out voltage conversion control when the battery voltage is judged to be more than 40V in the discharging state so as to convert the second direct current into fourth direct current; when the battery is judged to be under-voltage and/or discharge is forbidden, the voltage conversion control is stopped, and a locking state is entered.
On the other hand, an embodiment of the present invention further provides a multi-path bidirectional voltage transformation controller, including:
a memory for storing a program;
a processor for implementing the functions of the apparatus of any one of claims 1-9 by executing the program stored by the memory.
The multi-path bidirectional voltage transformation control device and the controller provided by the embodiment of the invention are used for detecting the working states of a charging and discharging battery and commercial power alternating current through the state detection module; the LLC bidirectional control module is used for performing forward voltage conversion control on the LLC bidirectional voltage transformation circuit according to the detection result of the state detection module so as to convert the first direct current into a second direct current and charge the charging and discharging battery; or reverse voltage conversion control to convert the second direct current output by the charging and discharging battery into the first direct current; the boost module is used for performing voltage boost conversion on the boost circuit according to the detection result of the state detection module so as to convert third direct current into second direct current and charge the charge-discharge battery; and the buck voltage reduction module is used for performing voltage reduction conversion on the buck voltage reduction circuit according to the detection result of the state detection module so as to convert the second direct current output by the charge-discharge battery into fourth direct current. And the management and control of each charge-discharge loop are realized through each module in the multi-path bidirectional variable voltage control device. The whole circuit coordination is relatively good, and the fault rate of the whole circuit is reduced.
Drawings
Fig. 1 is a schematic diagram of a connection structure of a multi-path bidirectional transformer controller, a control circuit and an inductor according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a connection structure of a multi-path bidirectional voltage transformation controller and a control circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of state transition of a state detection module according to an embodiment of the present invention;
fig. 4 is a schematic diagram of state transition of an LLC bidirectional control module according to an embodiment of the present invention;
fig. 5 is a schematic state transition diagram of a boost module according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating state transition of the buck voltage-reducing module according to the embodiment of the present invention.
Reference numerals:
the objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1 and fig. 2, an embodiment of the present invention provides a multi-path bidirectional voltage transformation control apparatus, including: the device comprises a state detection module, an LLC bidirectional control module, a boost module and a buck voltage reduction module, wherein the state detection module is used for detecting the working states of a charge-discharge battery and commercial power alternating current; as shown in fig. 1 and 2, the state detection module may be connected to a sensor. The voltage and temperature of each module of the circuit are detected and the states of control keys and the like are detected through the sensors. Because the charging and discharging battery is connected with the multi-path power supply conversion circuit, the charging of the charging and discharging battery is realized through one path of the multi-path power supply conversion circuit, or the electric quantity of the charging and discharging battery is discharged to the outside through one path of the multi-path power supply conversion circuit, so that the power is supplied for the electric equipment. Because the charge-discharge circuit that is connected to charge-discharge battery is more, and the relation of charging electricity is relatively complicated, need pass through state detection module carries out state detection to each charge circuit to guarantee whole circuit coordinated operation, avoid appearing the charge-discharge conflict and lead to the power supply circuit unusual, perhaps appear leading to the circuit to break down unusually, guarantee that the circuit charges normally.
The LLC bidirectional control module is connected with the state detection module and used for performing forward voltage conversion control on the LLC bidirectional voltage transformation circuit according to a detection result of the state detection module so as to convert the first direct current into a second direct current and charge a charging and discharging battery; or reverse voltage conversion control to convert the second direct current output by the charging and discharging battery into the first direct current; as shown in fig. 2, the LLC bidirectional control module is configured to perform voltage conversion control on the LLC bidirectional transformer circuit, and the LLC bidirectional control module is connected to each voltage conversion control end of the LLC bidirectional transformer circuit through a control interface of the controller, and controls the on/off of the MOS transistors Q1-Q8 by outputting PWM pulse signals. During forward conversion, the first direct current is pulse-modulated by controlling the on/off of the MOS transistors Q1-Q4, then the voltage is transformed by the LLC resonant circuit and the transformer, and then the transformed voltage is output from the other end of the transformer, and the transformed voltage pulse signal is rectified and output into second direct current by controlling the on/off of the MOS transistors Q5-Q8, and then the second direct current is rectified and output. In the actual control process, the forward or reverse conversion information can be acquired by the state detection circuit and then the forward or reverse conversion control is carried out.
The boost module is connected with the state detection module and used for performing voltage boost conversion on the boost circuit according to the detection result of the state detection module so as to convert third direct current into second direct current and charge the charging and discharging battery; as shown in fig. 2, the boost module is configured to perform voltage conversion control on the boost circuit, and the boost module is connected to each voltage conversion control terminal of the boost circuit through a control interface of the controller, and controls the on/off of the MOS transistors Q9 and Q10 by outputting a PWM pulse signal, so as to implement boost control on the boost circuit. In the actual control process, boost conversion control is carried out after the conversion information can be acquired by the state detection circuit.
The buck voltage reduction module is connected with the state detection module and used for performing voltage reduction conversion on the buck voltage reduction circuit according to the detection result of the state detection module so as to convert the second direct current output by the charge-discharge battery into fourth direct current. As shown in fig. 2, the buck voltage reduction module is configured to perform voltage conversion control on the buck voltage reduction circuit, and the buck voltage reduction module is connected to each voltage conversion control end of the buck voltage reduction circuit through a control interface of the controller, and controls the conduction or the cut-off of the MOS transistors Q11 and Q12 by outputting a PWM pulse signal, so as to implement voltage reduction control on the buck voltage reduction circuit. In the actual control process, buck voltage reduction conversion control is carried out after the conversion information can be acquired by the state detection circuit.
The multi-path bidirectional voltage transformation control device and the controller provided by the embodiment of the invention are used for detecting the working states of a charging and discharging battery and commercial power alternating current through the state detection module; the LLC bidirectional control module is used for performing forward voltage conversion control on the LLC bidirectional voltage transformation circuit according to the detection result of the state detection module so as to convert the first direct current into a second direct current and charge the charging and discharging battery; or reverse voltage conversion control to convert the second direct current output by the charging and discharging battery into the first direct current; the boost module is used for performing voltage boost conversion on the boost circuit according to the detection result of the state detection module so as to convert third direct current into second direct current and charge the charge-discharge battery; and the buck voltage reduction module is used for performing voltage reduction conversion on the buck voltage reduction circuit according to the detection result of the state detection module so as to convert the second direct current output by the charge-discharge battery into fourth direct current. And the management and control of each charge-discharge loop are realized through each module in the multi-path bidirectional variable voltage control device. The whole circuit coordination is relatively good, and the fault rate of the whole circuit is reduced.
Referring to fig. 1 and 2, the multi-path bidirectional voltage transformation control device further includes an ac/dc inverter module, and the ac/dc inverter module is connected to the state detection module and configured to perform voltage conversion control on the ac/dc conversion circuit according to a detection result of the state detection module, so as to convert the first dc power into an ac power or convert the ac power into the first dc power. As shown in fig. 1 and 2, the ac/dc inverter module is used for performing voltage conversion control on the ac/dc inverter circuit, and the ac/dc inverter module is connected to each voltage conversion control end of the ac/dc inverter circuit through a control interface of the controller, and controls the on/off of the MOS transistors Q13-Q16 by outputting a PWM pulse signal, so as to implement the inverter control on the ac/dc conversion. The inverter circuit is a full-bridge inverter circuit. In the actual control process, after the conversion information can be acquired by the state detection circuit, alternating current-direct current inversion conversion control is carried out.
Referring to fig. 1 and 2, the state detection module includes: and the voltage detection module is used for collecting the voltage of the charge and discharge battery through the first voltage sampling circuit and collecting the voltage value of the alternating current through the second voltage sampling circuit. The voltage detection module can acquire the voltage value of the charge-discharge battery so as to judge whether the charge-discharge battery can discharge outwards, and when the voltage of the charge-discharge battery is detected to be too low, the external discharge is not allowed so as to perform undervoltage protection on the battery. Through voltage detection module still can acquire mains supply alternating current's voltage value, so that judge whether mains supply alternating current supplies power normally, when detecting that mains supply alternating current supplies power unusually, then not allow through the mains supply alternating current to charge the charging and discharging battery to avoid appearing charging failure.
The state detection module further comprises: the temperature detection module is used for collecting the temperature of the charge and discharge battery through the first temperature sampling circuit and collecting the temperature value of the LLC bidirectional voltage transformation circuit through the second temperature sampling circuit. The temperature detection module can acquire the voltage value of the charge and discharge battery so as to judge whether the charge and discharge battery is over-temperature, and when the charge and discharge battery is over-temperature, the charge and discharge battery is not allowed to be charged so as to carry out over-temperature protection on the charge and discharge battery. The temperature value of the LLC bidirectional voltage transformation circuit can be further obtained through the temperature detection module so as to judge whether the LLC bidirectional voltage transformation circuit is over-temperature, and when the LLC bidirectional voltage transformation circuit is detected to be over-temperature, the voltage conversion is not allowed to be continuously carried out so as to carry out over-temperature protection on the LLC bidirectional voltage transformation circuit.
The state detection module further comprises: the key module is used for acquiring whether the power key and/or the AC key are pressed down. The state detection module is respectively connected with the power key and the AC key through a key interface of the controller, and key state detection can be respectively carried out on the power key and the AC key through the key module.
The state detection module further comprises: and the communication module is used for communicating with the charging and discharging battery. The communication module can receive state information sent by the charging and discharging battery. For example, information on whether the charging/discharging battery is chargeable or not.
Referring to fig. 3, the state detection module is further configured to switch the operating state from the standby state to the charging state when it is determined that the power key is pressed, the communication is normal, and the voltage value of the alternating current is greater than 80V; as shown in fig. 3, when the state detection module detects that the power button is pressed, it indicates that the user needs to charge the rechargeable battery, and the operating state is switched from the standby state to the charging state by determining that the communication with the rechargeable battery is normal and the voltage value of the alternating current is greater than 80V. Therefore, the LLC bidirectional control module and the boost module can control the circuit to charge the charging and discharging battery.
Or when the power supply key is pressed, the communication is normal, the voltage value of the alternating current is larger than that of the power supply key, and the AC key is pressed, the working state is converted into a discharging state from a standby state; as shown in fig. 3, when the state detection module detects that the power key is pressed and the AC key is pressed, it indicates that the user needs to supply power to the outside, and the operating state is switched from the standby state to the discharging state by determining that the communication with the charging and discharging battery is normal and the AC power is turned off. Therefore, the LLC bidirectional control module and the buck voltage reduction module can control the circuits to discharge outwards after voltage conversion is carried out on the charge and discharge battery.
Or when the commercial power is disconnected or the communication is interrupted or the battery is over-temperature, the working state is converted from the charging state to the standby state; in the charging process, when the state detection module detects that abnormal conditions such as commercial power disconnection, communication interruption or battery over-temperature occur, the charging is stopped continuously, the standby state is carried out, and the LLC bidirectional control module, the AC/DC inversion module and the boost module also start to stop carrying out voltage conversion control.
Or when the AC key is pressed for a long time or the communication is interrupted or the battery power is less than 10% or the battery temperature is more than 70 ℃, the working state is converted from the discharging state to the standby state. In the discharging process, when the state detection module detects that abnormal conditions such as AC key length pressing or communication interruption or battery power less than 10% or battery temperature greater than 70 ℃ occur, the continuous discharging is stopped, the standby state is carried out, and the LLC bidirectional control module, the AC-DC inversion module and the buck module also start to stop voltage conversion control.
Referring to fig. 4, the LLC bidirectional control module includes: the bidirectional voltage transformation control system comprises a forward charging module and a reverse discharging module, wherein the forward charging module is used for controlling the LLC bidirectional voltage transformation circuit to perform forward voltage transformation control so as to convert a first direct current into a second direct current and charge a charging and discharging battery when the charging state is judged that the battery is not overvoltage, a bus is not overvoltage and the charging and discharging battery is not over-temperature; when the battery overvoltage and/or the bus overvoltage and/or the charging and discharging battery over-temperature are judged, the voltage conversion control is stopped, and the battery enters a locking state;
when the state detection module is switched from a standby state to a charging state, the forward charging module can control the LLC bidirectional voltage transformation circuit to perform voltage conversion control so as to convert the first direct current into a second direct current to charge a charging and discharging battery; in the process of charging the battery, when abnormal conditions such as battery overvoltage, bus overvoltage and/or charge-discharge battery over-temperature are detected, voltage conversion control is stopped, the battery enters a locking state, a power circuit is prevented from being damaged, and state information can be acquired by a state detection module through a sensor and is transmitted to a forward charging module for judgment.
The reverse discharge module is used for controlling the LLC bidirectional voltage transformation circuit to perform reverse voltage conversion control so as to convert the second direct current into the first direct current when the battery voltage is judged to be greater than 40V or the alternating current voltage is judged to be less than 50V in a discharge state; and when the battery is undervoltage and/or the bus is overvoltage and/or the over-temperature of the charge-discharge battery is judged and/or the discharge is forbidden, stopping the voltage conversion control and entering a locking state.
When the state detection module is switched from a standby state to a discharging state, the reverse charging module can control the LLC bidirectional voltage transformation circuit to perform voltage conversion control so as to convert the second direct current into a first direct current to supply power to the outside; in the external power supply process, when abnormal conditions such as battery undervoltage, bus overvoltage, over-temperature of a charge-discharge battery and/or discharge prohibition and the like are detected, voltage conversion control is stopped, and a locking state is entered to avoid a power circuit from being damaged.
Referring to fig. 5, the boost module is further configured to, in a charging state, control the boost circuit to perform voltage conversion control when it is determined that the third dc voltage is greater than 12V, so as to convert the third dc voltage into a second dc voltage for charging the charging and discharging battery; and when the battery overvoltage and/or the bus overvoltage and/or the charging and discharging battery over-temperature are judged, the voltage conversion control is stopped, and the locking state is entered.
When the state detection module is switched from a standby state to a charging state, the boost module can control the boost circuit to carry out voltage conversion control so as to convert the third direct current into second direct current and charge the charging and discharging battery; in the charging process, when abnormal conditions such as battery overvoltage and/or bus overvoltage and/or charge-discharge battery over-temperature are detected, voltage conversion control is stopped, and the battery enters a locking state, so that a power supply circuit is prevented from being damaged.
Referring to fig. 6, the buck voltage reducing module is further configured to, in a discharging state, control the buck voltage reducing circuit to perform voltage conversion control when it is determined that the battery voltage is greater than 40V, so as to convert the second direct current into a fourth direct current; when the battery is judged to be under-voltage and/or discharge is forbidden, the voltage conversion control is stopped, and a locking state is entered.
When the state detection module is switched from a standby state to a discharging state, the buck voltage reduction module can control the buck voltage reduction circuit to perform voltage conversion control so as to convert the second direct current into fourth direct current to supply power to the outside; in the external power supply process, when abnormal conditions such as battery undervoltage and/or discharge prohibition are detected, the voltage conversion control is stopped, and the power supply circuit is prevented from being damaged.
On the other hand, an embodiment of the present invention further provides a multi-path bidirectional voltage transformation controller, including:
a memory for storing a program;
and a processor for implementing the functions of the above-mentioned device by executing the program stored in the memory.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing detailed description, or equivalent changes may be made in some of the features of the embodiments. All equivalent structures made by using the contents of the specification and the attached drawings of the invention can be directly or indirectly applied to other related technical fields, and are also within the protection scope of the patent of the invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that those skilled in the art may make variations, modifications, substitutions and alterations within the scope of the present invention without departing from the spirit and scope of the present invention.
Claims (10)
1. A multi-path bidirectional variable voltage control device is characterized by comprising:
the state detection module is used for detecting the working states of the charging and discharging batteries and commercial power alternating current;
the LLC bidirectional control module is connected with the state detection module and used for performing forward voltage conversion control on the LLC bidirectional voltage transformation circuit according to a detection result of the state detection module so as to convert the first direct current into a second direct current and charge a charging and discharging battery; or reverse voltage conversion control to convert the second direct current output by the charging and discharging battery into the first direct current;
the boost module is connected with the state detection module and used for performing voltage boost conversion on the boost circuit according to the detection result of the state detection module so as to convert third direct current into second direct current and charge the charge and discharge battery;
and the buck voltage reduction module is connected with the state detection module and used for performing voltage reduction conversion on the buck voltage reduction circuit according to the detection result of the state detection module so as to convert the second direct current output by the charge-discharge battery into fourth direct current.
2. The multi-path bidirectional voltage transformation control device according to claim 1, further comprising an ac/dc inverter module, connected to the state detection module, for performing voltage conversion control on the ac/dc conversion circuit according to a detection result of the state detection module to convert the first dc into ac or convert the ac into the first dc.
3. The multi-way bidirectional voltage transformation control device according to claim 2, wherein the state detection module comprises:
and the voltage detection module is used for collecting the voltage of the charge and discharge battery through the first voltage sampling circuit and collecting the voltage value of the alternating current through the second voltage sampling circuit.
4. The multi-way bidirectional voltage transformation control device according to claim 3, wherein the state detection module further comprises:
the temperature detection module is used for collecting the temperature of the charging and discharging battery through the first temperature sampling circuit and collecting the temperature value of the LLC bidirectional voltage transformation circuit through the second temperature sampling circuit.
5. The multi-way bidirectional voltage transformation control device according to claim 1, wherein the state detection module further comprises:
the key module is used for acquiring whether the power key and/or the AC key are pressed down.
6. The multi-way bidirectional voltage transformation control device according to claim 1, wherein the state detection module further comprises:
a communication module for communicating with the charge and discharge battery.
7. The multi-path bidirectional voltage transformation control device according to claim 6, wherein the state detection module is further configured to switch the operating state from the standby state to the charging state when it is determined that the power key is pressed, the communication is normal, and the voltage value of the alternating current is greater than 80V;
or when the power supply key is pressed, the communication is normal, the voltage value of the alternating current is larger than that of the power supply key and the AC key is pressed, the working state is converted into a discharging state from a standby state;
or when the commercial power is disconnected or the communication is interrupted or the battery is over-temperature, the working state is converted from the charging state to the standby state;
or when judging that the AC key is pressed for a long time or the communication is interrupted or the battery power is less than 10% or the battery temperature is more than 70 ℃, converting the working state from the discharging state to the standby state.
8. The multi-path bidirectional voltage transformation control device of claim 7, wherein the LLC bidirectional control module comprises:
the forward charging module is used for controlling the LLC bidirectional voltage transformation circuit to perform forward voltage conversion control so as to convert the first direct current into second direct current and charge the charging and discharging battery when the battery is judged to be overvoltage-free, the bus is overvoltage-free and the charging and discharging battery is not over-temperature in a charging state; when the battery overvoltage and/or the bus overvoltage and/or the charging and discharging battery over-temperature are judged, the voltage conversion control is stopped, and the battery enters a locking state;
the reverse discharge module is used for controlling the LLC bidirectional transformation circuit to perform reverse voltage conversion control so as to convert the second direct current into the first direct current when the battery voltage is judged to be greater than 40V or the alternating current voltage is judged to be less than 50V in a discharge state; and when the battery is undervoltage and/or the bus is overvoltage and/or the over-temperature of the charge-discharge battery is judged and/or the discharge is forbidden, stopping the voltage conversion control and entering a locking state.
9. The multi-path bidirectional voltage transformation control device according to claim 7, wherein the boost module is further configured to control the boost circuit to perform voltage conversion control to convert the third dc power into the second dc power for charging the charging/discharging battery when the third dc power is determined to be greater than 12V in the charging state; when the battery overvoltage and/or the bus overvoltage and/or the charging and discharging battery over-temperature are judged, the voltage conversion control is stopped, and the battery enters a locking state;
the buck voltage reduction module is also used for controlling the buck voltage reduction circuit to carry out voltage conversion control when the battery voltage is judged to be more than 40V in the discharging state so as to convert the second direct current into fourth direct current; when the battery is judged to be under-voltage and/or discharge is forbidden, the voltage conversion control is stopped, and a locking state is entered.
10. A multi-path bidirectional voltage transformation controller is characterized by comprising:
a memory for storing a program;
a processor for implementing the functions of the apparatus of any one of claims 1-9 by executing the program stored by the memory.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210343118.9A CN114726036A (en) | 2022-04-02 | 2022-04-02 | Multi-path bidirectional variable-voltage control device and controller |
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| CN202210343118.9A CN114726036A (en) | 2022-04-02 | 2022-04-02 | Multi-path bidirectional variable-voltage control device and controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116054337A (en) * | 2023-01-13 | 2023-05-02 | 中国铁塔股份有限公司 | Power supply device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116054337A (en) * | 2023-01-13 | 2023-05-02 | 中国铁塔股份有限公司 | Power supply device and method |
| CN116054337B (en) * | 2023-01-13 | 2024-01-30 | 铁塔能源有限公司 | Power supply device and method |
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