WO2021012219A1 - 充放电电路、车载充放电***及充电、放电方法 - Google Patents
充放电电路、车载充放电***及充电、放电方法 Download PDFInfo
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- WO2021012219A1 WO2021012219A1 PCT/CN2019/097531 CN2019097531W WO2021012219A1 WO 2021012219 A1 WO2021012219 A1 WO 2021012219A1 CN 2019097531 W CN2019097531 W CN 2019097531W WO 2021012219 A1 WO2021012219 A1 WO 2021012219A1
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- Prior art keywords
- switch
- battery pack
- circuit module
- charging
- power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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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
-
- 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
-
- 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
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2210/00—Converter types
- B60L2210/30—AC to DC converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Definitions
- This application relates to the field of circuit design, in particular to a charging and discharging circuit, a vehicle-mounted charging and discharging system, and a charging and discharging method.
- the embodiments of the present application provide a charging and discharging circuit, a vehicle-mounted charging and discharging system, and a charging and discharging method.
- the charging and discharging circuit adds multiple battery packs to enable the entire vehicle to obtain greater power, which can effectively increase the cruising range of electric vehicles and facilitate Long-distance travel for users brings convenience to users.
- the first aspect of the embodiments of the application provides a charging and discharging circuit, which is applied to a vehicle charging and discharging system, and includes a rectifier circuit module, a voltage regulating circuit module, a first battery pack, a second battery pack, a first switch, a second switch, and a whole Vehicle controller, load, of which,
- the rectifier circuit module is connected in series with the voltage regulating circuit module, the voltage regulating circuit module is connected to the first battery pack, the first battery pack is connected to the load, and the second battery pack passes through the second switch Connect the load and one end of the voltage regulating circuit module, the second battery pack is connected to the other end of the voltage regulating circuit module through the first switch, the voltage regulating circuit module and the first battery pack , The first switch, the second switch, and the second battery pack are all connected to the vehicle controller;
- the first battery pack includes a first internal switch
- the second battery pack includes a second internal switch
- the vehicle controller is used to control the first switch, the second switch, and the first internal switch And the second internal switch
- the vehicle controller is also used to control the voltage conversion rate of the voltage regulating circuit module
- the vehicle controller When the vehicle is in a charging state, the vehicle controller is used to control the first switch and the second switch to open, the first internal switch is closed, and the rectifier circuit module is used to convert alternating current to direct current To charge the first battery pack; or, the vehicle controller is used to control the first switch and the first internal switch to open, and the second switch and the second internal switch to close, The rectifier circuit module is used to convert alternating current to direct current to charge the second battery pack; when the vehicle is in a driving state, the vehicle controller is used to control the first switch and the second switch Open, the first internal switch is closed, so that the first battery pack alone supplies power to the load; or, the vehicle controller is used to control the first switch and the first internal switch to open , The second switch and the second internal switch are closed, so that the second battery pack alone supplies power to the load; or, the vehicle controller is used to control the second switch to open, and the The first switch, the first internal switch and the second internal switch are closed, and the voltage regulating circuit module is used to convert the voltage of the second
- the charging and discharging circuit further includes a first pre-charging circuit module, wherein,
- the first pre-charging circuit module is connected in series between the first switch and the voltage regulating circuit module, and the first pre-charging circuit module is connected to the vehicle controller;
- the first pre-charging circuit module is used to protect the voltage regulating circuit module.
- the first pre-charging circuit module includes a first pre-charging resistor, a third switch, a first diode, and a second diode, wherein,
- the first precharge resistor is connected in parallel with the third switch, one end of the first precharge resistor is connected to the second battery pack through the first switch, and the other end of the first precharge resistor is connected to the second battery pack.
- the anode of a diode, the cathode of the first diode is connected to the voltage regulating circuit module, the cathode of the second diode is connected to the second battery pack through the first switch, the first The anodes of the two diodes are connected to the voltage regulating circuit module.
- the voltage regulating circuit module includes a power factor control PFC circuit and a DC/DC circuit, wherein,
- the power factor control PFC circuit is connected to the DC/DC circuit, the rectifier circuit module is connected in series with the power factor control PFC circuit, and the DC/DC circuit is connected to the first battery pack and passes through the second switch Connected to the second battery pack, the power factor control PFC circuit and the DC/DC circuit are connected to the vehicle controller;
- the power factor control PFC circuit is used for power factor correction of the voltage, and the DC/DC circuit is used for adjusting the voltage value.
- the charge and discharge circuit further includes a second precharge circuit module, the second precharge circuit includes a second precharge resistor, a fourth switch, and a fifth switch, and the rectifier circuit module includes a rectifier bridge ,among them,
- the second precharge resistor is connected to an external input power source, the second precharge resistor is also connected in parallel with the fourth switch and then connected to the fifth switch, and the fifth switch is connected to the rectifier bridge;
- the second precharge resistor is used to protect the rectifier circuit module, and when the entire vehicle is in a charging state, the fifth switch is used to control the connection or disconnection of the charging circuit.
- the second aspect of the embodiments of the present application also provides a vehicle-mounted charging and discharging system, which includes an input power source and the above-mentioned charging and discharging circuit, wherein:
- the input power source is connected to the rectifier circuit module, the rectifier circuit module is connected in series with the voltage regulating circuit module, the voltage regulating circuit module is connected to the first battery pack, and the first battery pack is connected to the load.
- the second battery pack is connected to the load and one end of the voltage regulating circuit module through the second switch, and the second battery pack is connected to the other end of the voltage regulating circuit module through the first switch.
- the voltage regulating circuit module, the first battery pack, the first switch, the second switch, and the second battery pack are all connected to the vehicle controller;
- the first battery pack includes a first internal switch
- the second battery pack includes a second internal switch
- the vehicle controller is used to control the first switch, the second switch, and the first internal switch And the second internal switch
- the input power supply supplies power to the first battery pack and the second battery pack
- the vehicle controller is also used to control the voltage conversion rate of the voltage regulating circuit module
- the vehicle controller When the vehicle is in a charging state, the vehicle controller is used to control the first switch and the second switch to open, the first internal switch is closed, and the rectifier circuit module is used to connect the input power supply and switch AC power is converted to DC power to charge the first battery pack; or, the vehicle controller is used to control the first switch and the first internal switch to be turned off, and the second switch and the second switch The internal switch is closed, and the rectifier circuit module is used to connect the input power supply and convert alternating current to direct current to charge the second battery pack; when the vehicle is in the driving state, the vehicle controller is used to control the The first switch and the second switch are opened, and the first internal switch is closed, so that the first battery pack alone supplies power to the load; or, the vehicle controller is used to control the first The switch and the first internal switch are disconnected, and the second switch and the second internal switch are closed, so that the second battery pack alone supplies power to the load; or, the vehicle controller is used to control The second switch is off, the first switch, the first internal switch, and the second internal
- the third aspect of the embodiments of the present application also provides a charging method, which is applied to the above-mentioned vehicle charging and discharging system, and the method includes:
- the first battery pack includes a first internal switch
- the second battery pack includes a second internal switch. switch
- control of the first internal switch and the second internal switch, as well as the second switch and the first switch, is performed on the first battery pack or the second battery pack Charging, including:
- the first switch and the first internal switch are opened, the second switch and the second internal switch are closed, and the second battery pack is charged ;
- the first battery pack or the second battery pack is charged according to a preset strategy, and the preset strategy includes a preset strategy The order of charging or the battery packs with better performance detected shall be charged first.
- the fourth aspect of the embodiments of the present application also provides a discharging method, which is applied to the above-mentioned vehicle charging and discharging system, and the method includes:
- the first battery pack and/or the second battery pack are controlled to supply power to the load according to the electric quantity, the first battery pack includes a first internal switch, and the second battery pack includes a second internal switch.
- controlling the first battery pack and/or the second battery pack to supply power to the load according to the electric quantity includes:
- the first switch and the second switch are opened, and the first internal switch is closed, Controlling the first battery pack to supply power to the load, and the preset amount of power is the minimum amount of power to supply power to the load;
- the first switch and the first internal switch are opened, and the A second switch and the second internal switch to control the second battery pack to supply power to the load;
- the second switch When the power of the first battery pack and the second battery pack is greater than the preset power, the second switch is opened, and the first switch, the first internal switch and the first switch are closed. Two internal switches to control the first battery pack and the second battery pack to simultaneously supply power to the load.
- the charging and discharging circuit is applied to the vehicle charging and discharging system, including a rectifier circuit module, a voltage regulating circuit module, a first battery pack, a second battery pack, a first switch, a second switch, a vehicle controller, and a load,
- the rectifier circuit module is connected in series with the voltage regulating circuit module
- the voltage regulating circuit module is connected to the first battery pack
- the first battery pack is connected to the load
- the second battery pack passes through the first battery pack.
- the battery pack, the first switch, the second switch, and the second battery pack are all connected to the vehicle controller;
- the first battery pack includes a first internal switch, and the second battery pack includes a Two internal switches;
- the vehicle controller is used to control the first switch, the second switch, the first internal switch, and the second internal switch;
- the vehicle controller is also used to control the The voltage conversion rate of the voltage regulating circuit module; when the entire vehicle is in a charging state, the vehicle controller is used to control the first switch and the second switch to open, the first internal switch to close, and the rectifier
- the circuit module is used to convert alternating current to direct current to charge the first battery pack; or, the vehicle controller is used to control the first switch and the first internal switch to turn off, and the second switch And the second internal switch is closed, the rectifier circuit module is used to convert alternating current to direct current to
- multiple battery packs are used in the charging and discharging circuit in this application, which can realize the charging of multiple battery packs, so that the whole vehicle can obtain greater power, and can realize the simultaneous discharge of multiple battery packs through the voltage regulating circuit module, realizing different battery packs
- the mixed use of increases the cruising range, facilitates long-distance driving, and brings convenience to users.
- FIG. 1 is a schematic structural diagram of a charging and discharging circuit provided by an embodiment of the present application
- FIG. 2 is a schematic structural diagram of another charging and discharging circuit provided by an embodiment of the present application.
- FIG. 3 is a schematic structural diagram of another charging and discharging circuit provided by an embodiment of the present application.
- FIG. 4 is a schematic diagram of a vehicle-mounted charging and discharging system provided by an embodiment of the present application.
- FIG. 5 is a schematic flowchart of a charging method provided by an embodiment of the present application.
- FIG. 6 is a schematic flowchart of a discharging method provided by an embodiment of the present application.
- the most influencing electric vehicle is the replacement or charging of batteries.
- Normal electric vehicles use a single battery pack.
- the mains input charges the single battery pack through a rectifier current and a voltage regulating circuit.
- the single battery pack provides power to the load.
- the existing vehicle battery charging and discharging method can only realize the function of charging a single battery pack, cannot realize the mixed use of different battery packs, has a short cruising range, is not convenient for users to travel long distances, and cannot bring convenience to users.
- a charging and discharging circuit an on-board charging and discharging system, and a charging and discharging method.
- the charging and discharging circuit is applied to the on-board charging and discharging system and includes a rectifier circuit module, a voltage regulating circuit module, and a first battery.
- the rectifier circuit module is connected in series with the voltage regulating circuit module, the voltage regulating circuit module is connected to the first battery pack, the first battery pack is connected to the load, and the second battery pack passes through the second switch
- the load is connected to one end of the voltage regulating circuit module, the second battery pack is connected to the voltage regulating circuit module through the first switch, and the other end of the voltage regulating circuit module is connected to the first battery pack ,
- the first switch, the second switch, and the second battery pack are all connected to the vehicle controller; the first battery pack includes a first internal switch, and the second battery pack includes a second internal switch.
- the vehicle controller is used to control the first switch, the second switch, the first internal switch, and the second internal switch; the vehicle controller is also used to control the voltage regulation The voltage conversion rate of the circuit module; when the vehicle is in a charging state, the vehicle controller is used to control the first switch and the second switch to open, the first internal switch is closed, and the rectifier circuit module Used to convert alternating current to direct current to charge the first battery pack; or, the vehicle controller is used to control the first switch and the first internal switch to turn off, and the second switch and the The second internal switch is closed, and the rectifier circuit module is used to convert alternating current to direct current to charge the second battery pack; when the vehicle is in a driving state, the vehicle controller is used to control the first The switch and the second switch are disconnected, and the first internal switch is closed, so that the first battery pack alone supplies power to the load; or, the vehicle controller is used to control the first switch and the The first internal switch is open, and the second switch and the second internal switch are closed, so that the second battery pack alone supplies power to the load
- multiple battery packs are used in the charging and discharging circuit in this application, which can realize the charging of multiple battery packs, so that the whole vehicle can obtain greater power, and can realize the simultaneous discharge of multiple battery packs through the voltage regulating circuit module, realizing different battery packs
- the mixed use of increases the cruising range, facilitates long-distance driving, and brings convenience to users.
- FIG. 1 is a schematic diagram of a charging and discharging circuit provided by an embodiment of the present application.
- the charging and discharging circuit 100 is applied to a vehicle charging and discharging system and includes a rectifier circuit module 110, a voltage regulating circuit module 120, and a first battery pack 130.
- the second battery pack 140, the first switch 150, the second switch 160, the vehicle controller 170, and the load 200 wherein:
- the rectifier circuit module 110 is connected in series with the voltage regulating circuit module 120, the voltage regulating circuit module 120 is connected to the first battery pack 130, the first battery pack 130 is connected to the load 200, and the second battery pack 140 is connected to the load 200 and one end of the voltage regulating circuit module 120 through the second switch 160, and the second battery pack 140 is connected to the other end of the voltage regulating circuit module 120 through the first switch 150,
- the voltage regulating circuit module 120, the first battery pack 130, the first switch 150, the second switch 160, and the second battery pack 140 are all connected to the vehicle controller 170;
- the first battery pack 130 includes a first internal switch
- the second battery pack 140 includes a second internal switch
- the vehicle controller 170 is used to control the first switch 150, the second switch 160, The first internal switch and the second internal switch
- the vehicle controller 170 is also used to control the voltage conversion rate of the voltage regulating circuit module 120;
- the vehicle controller 170 When the vehicle is in a charging state, the vehicle controller 170 is used to control the first switch 150 and the second switch 160 to open, the first internal switch is closed, and the rectifier circuit module 110 is used for Convert AC power to DC power to charge the first battery pack 130; or, the vehicle controller 170 is used to control the first switch 150 and the first internal switch to be turned off, and the second switch 160 and the second internal switch are closed, and the rectifier circuit module 110 is used to convert alternating current to direct current to charge the second battery pack 140; when the vehicle is in the driving state, the vehicle controller 170 Used to control the opening of the first switch 150 and the second switch 160, and the first internal switch to close, so that the first battery pack 130 alone supplies power to the load 200; or, the vehicle The controller 170 is used to control the first switch 150 and the first internal switch to open, and the second switch 160 and the second internal switch to close, so as to realize that the second battery pack 140 is the The load 200 supplies power; or, the vehicle controller 170 is used to control the second switch 160
- the second battery pack is an additional battery pack, and its capacity may be different from the capacity of the first battery pack, and the second battery pack may also be exactly the same as the first battery pack, so it is different
- the voltage regulating module adjusts the charging voltage of different battery packs; and when the first battery pack and the second battery pack have charging requirements, the first battery pack is charged according to a preset strategy
- One battery pack or the second battery pack is charged, and the preset strategy may include, but is not limited to, a preset charging sequence, or preferential charging of battery packs with better performance detected.
- FIG. 2 is a schematic diagram of a charging and discharging circuit provided by an embodiment of the application.
- the charging and discharging circuit further includes a first pre-charging circuit module 180, wherein:
- the first pre-charging circuit module 180 is connected in series between the first switch 150 and the voltage regulating circuit module 120, and the first pre-charging circuit module 180 is connected to the vehicle controller 170;
- the first pre-charging circuit module 180 is used to protect the voltage regulating circuit module 120.
- one end of the first pre-charging circuit module 180 is connected to the second battery pack 140 through the first switch 150, and the second battery pack 140 is connected to the load through the second switch 160; the other end of the first pre-charging circuit module 180 is connected to the voltage regulator.
- the circuit module 120 and the rectifier circuit module 110 are connected to the second pre-charging circuit module 190, and the voltage regulating circuit module 120 is connected to the first battery pack 130 and the load 200.
- the first pre-charging circuit module 180 is connected in series between the second battery pack 140 and the voltage regulating circuit module 120 to prevent the moment when the first switch 150 is closed and the second battery pack is discharged when the whole vehicle is in the charging state.
- the current causes damage to the voltage regulating circuit module 120 and the rectifying circuit module 110.
- the first precharge circuit module 180 includes a first precharge resistor 181, a third switch 182, and a second Pole tube 183 and second diode 184, among which,
- the first precharge resistor 181 is connected in parallel with the third switch 182, one end of the first precharge resistor 181 is connected to the second battery pack 140 through the first switch 150, and the first precharge resistor 181 The other end is connected to the anode of the first diode 183, the cathode of the first diode 183 is connected to the voltage regulating circuit module 120, and the cathode of the second diode 184 passes through the first switch 150.
- the second battery pack 140 is connected, and the anode of the second diode 184 is connected to the voltage regulating circuit module 120.
- One end of the first precharge resistor 181 is connected to the first switch 150 and then connected to the second battery pack 140, and the other end of the first precharge resistor 181 is connected to the anode of the first diode 183; the cathode of the second diode 184 passes through The first switch 150 is connected to the second battery pack 140.
- first switch 150 and the second switch 160 may be single-pole switches or double-pole switches, as shown in FIG. 3, the first switch 150 and the second switch 160 are double-pole switches, and the first switch 150 includes K7 and K8, and the second switch 160 includes K9 and K10.
- the first switch 150 is first closed to complete the precharging, and then the third switch 182 is closed.
- the first pre-charging circuit 180 prevents the first switch 150 from being closed and the discharge current of the second battery pack 140 causes damage to the voltage regulating circuit module 120 and the rectifying circuit module 110;
- the cathode of the second diode 184 is connected to the second battery pack 140 through the first switch 150 to avoid reverse connection of the second battery pack 140 to protect the circuit, and the circuit is simple, low in cost, and small in space.
- the voltage regulating circuit module 120 includes a power factor control PFC circuit 121 and a DC/DC circuit 122, where:
- the power factor control PFC circuit 121 is connected to the DC/DC circuit 122, the rectifier circuit module 110 is connected in series to the power factor control PFC circuit 121, and the DC/DC circuit 122 is connected to the first battery pack 130, and The second battery pack 140 is connected through the second switch 160, and the power factor control PFC circuit 121 and the DC/DC circuit 122 are connected to the vehicle controller 170;
- the power factor control PFC circuit 121 is used for power factor correction of voltage, and the DC/DC circuit 122 is used for adjusting the voltage value.
- the vehicle controller 170 controls the power factor control PFC circuit 121 and the DC/DC circuit 122 to adjust the charging voltage to adapt to the charging voltage of the first battery pack 130 or the second battery pack 140.
- the vehicle controller 170 controls the power factor control PFC circuit 121 and the DC/DC circuit 122 to adjust the charging voltage so that the voltage range and other parameters of the second battery pack 140 are the same as those of the first battery pack 130. Load power supply.
- adjusting the charging voltage or the discharging voltage of the second battery pack 140 through the power factor control PFC circuit 121 and the DC/DC circuit 122 can charge multiple different battery packs, increase the battery power of the entire vehicle, and It can discharge different battery packs at the same time, realize the mixed use of different battery packs, and increase the cruising range.
- the charging and discharging circuit further includes a second precharging circuit module 190, the second precharging circuit module 190 is connected to the vehicle controller 170, and the second The precharge circuit module 190 includes a second precharge resistor 191, a fourth switch 192, and a fifth switch 193.
- the rectifier circuit module 110 includes a rectifier bridge 111, wherein,
- the second precharge resistor 191 is used to connect an external input power source, the second precharge resistor 191 is also connected in parallel with the fourth switch 192 and then connected to the fifth switch 193, and the fifth switch 193 is connected to the rectifier Bridge 111;
- the second precharge resistor 191 is used to protect the rectifier circuit module 110, and when the entire vehicle is in a charging state, the fifth switch 193 is used to control the connection or disconnection of the charging circuit.
- the second pre-charging circuit module 190 is connected to the detection circuit 400, and the detection circuit 400 is used to detect the charging circuit voltage.
- the detection circuit 400 is used to detect the charging circuit voltage.
- the second pre-charging circuit module when the entire vehicle is in a charging state, the second pre-charging circuit module is used to prevent the rectifier circuit module 110 from being damaged by the charging current of the input power at the moment when the fifth switch 193 is closed.
- FIG. 4 is a schematic diagram of the vehicle-mounted charging and discharging system.
- the input power source 300 is connected to the rectifier circuit module 110, the rectifier circuit module 110 is connected in series with the voltage regulating circuit module 120, and the voltage regulating circuit module 120 is connected to the first battery pack 130.
- the first battery pack 130 is connected to the load 200
- the second battery pack 140 is connected to the load 200 and one end of the voltage regulating circuit module 120 through the second switch 160, and the second battery pack 140 is connected through the first switch.
- 150 is connected to the other end of the voltage regulating circuit module 120, the voltage regulating circuit module 120, the first battery pack 130, the first switch 150, the second switch 160, and the second battery pack 140 Are connected to the vehicle controller 170;
- the first battery pack 130 includes a first internal switch
- the second battery pack 140 includes a second internal switch
- the vehicle controller 170 is used to control the first switch 150, the second switch 160, The first internal switch and the second internal switch
- the input power source 300 supplies power to the first battery pack 130 and the second battery pack 140
- the vehicle controller 170 is also used to control the The voltage conversion rate of the voltage regulating circuit module 120;
- the vehicle controller 170 When the vehicle is in a charging state, the vehicle controller 170 is used to control the first switch 150 and the second switch 160 to open, the first internal switch is closed, and the rectifier circuit module 110 is used for Connect the input power source 300 and convert AC power to DC power to charge the first battery pack 130; or, the vehicle controller 170 is used to control the first switch 150 and the first internal switch to be turned off, The second switch 160 and the second internal switch are closed, and the rectifier circuit module 110 is used to connect the input power supply 300 and convert alternating current to direct current to charge the second battery pack 140;
- the vehicle controller 170 When in the driving state, the vehicle controller 170 is used to control the first switch 150 and the second switch 160 to open, and the first internal switch to close, so that the first battery pack 130 alone
- the load 200 provides power; or, the vehicle controller 170 is used to control the first switch 150 and the first internal switch to be disconnected, and the second switch 160 and the second internal switch to be closed to Realizing that the second battery pack 140 alone supplies power to the load 200
- FIG. 5 is a schematic flowchart of the charging method. As shown in the figure, the charging method is applied to the above-mentioned vehicle charging and discharging system, and the method includes:
- S501 When it is detected that the whole vehicle is in a charging state, determine the charging requirements of the first battery pack and the second battery pack, the first battery pack includes a first internal switch, and the second battery pack includes a first battery pack. Two internal switches;
- S503 Control the first internal switch and the second internal switch, and the second switch and the first switch to charge the first battery pack or the second battery pack.
- control of the first internal switch and the second internal switch, as well as the second switch and the first switch, is for the first battery pack or the second battery pack To charge, including:
- the first switch and the first internal switch are opened, the second switch and the second internal switch are closed, and the second battery pack is charged ;
- the first battery pack or the second battery pack is charged according to a preset strategy, and the preset strategy includes a preset strategy The order of charging or the battery packs with better performance detected shall be charged first.
- FIG. 6 is a schematic flowchart of the discharge method. As shown in the figure, the discharge method is applied to the above-mentioned on-board charging and discharging system, and the method includes:
- the first battery pack includes a first internal switch
- the second battery pack includes a second internal switch. switch.
- controlling the first battery pack and/or the second battery pack to supply power to the load according to the electric quantity includes:
- the first switch and the second switch are opened, and the first internal switch is closed, Controlling the first battery pack to supply power to the load, and the preset amount of power is the minimum amount of power to supply power to the load;
- the first switch and the first internal switch are opened, and the A second switch and the second internal switch to control the second battery pack to supply power to the load;
- the second switch When the power of the first battery pack and the second battery pack is greater than the preset power, the second switch is opened, and the first switch, the first internal switch and the first switch are closed. Two internal switches to control the first battery pack and the second battery pack to simultaneously supply power to the load.
- the disclosed device may be implemented in other ways.
- the device embodiments described above are only illustrative.
- the division of the above-mentioned units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or integrated To another system, or some features can be ignored, or not implemented.
- the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.
- the units described above as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
- each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
- the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
Description
Claims (10)
- 一种充放电电路,其特征在于,包括整流电路模块、调压电路模块、第一电池包、第二电池包、第一开关、第二开关、整车控制器、负载,其中,所述整流电路模块串联所述调压电路模块,所述调压电路模块连接所述第一电池包,所述第一电池包连接所述负载,所述第二电池包通过所述第二开关连接所述负载以及所述调压电路模块的一端,所述第二电池包通过所述第一开关连接所述调压电路模块的另一端,所述调压电路模块、所述第一电池包、所述第一开关、所述第二开关、所述第二电池包均连接所述整车控制器;所述第一电池包包括第一内部开关,所述第二电池包包括第二内部开关;所述整车控制器用于控制所述第一开关、所述第二开关、所述第一内部开关以及所述第二内部开关;所述整车控制器还用于控制所述调压电路模块的电压转换率;当整车处于充电状态时,所述整车控制器用于控制所述第一开关和所述第二开关断开,所述第一内部开关闭合,所述整流电路模块用于将交流电转换为直流电以实现对所述第一电池包充电;或,所述整车控制器用于控制所述第一开关和所述第一内部开关断开,所述第二开关和所述第二内部开关闭合,所述整流电路模块用于将交流电转换为直流电以实现对所述第二电池包充电;当整车处于行车状态时,所述整车控制器用于控制所述第一开关和所述第二开关断开,所述第一内部开关闭合,以实现所述第一电池包单独为所述负载供电;或,所述整车控制器用于控制所述第一开关和所述第一内部开关断开,所述第二开关和所述第二内部开关闭合,以实现所述第二电池包单独为所述负载供电;或,所述整车控制器用于控制所述第二开关断开,所述第一开关、所述第一内部开关和所述第二内部开关闭合,所述调压电路模块用于将所述第二电池包的电压转换为跟所述第一电池包相同,以实现所述第一电池包和所述第二电池包同时为所述负载供电。
- 根据权利要求1所述的充放电电路,其特征在于,所述充放电电路还包括第一预充电路模块,其中,所述第一预充电路模块串联在所述第一开关和所述调压电路模块之间,所 述第一预充电路模块连接所述整车控制器;当所述第一电池包和所述第二电池包同时为所述负载供电时,所述第一预充电路模块用于保护所述调压电路模块。
- 根据权利要求2所述的充放电电路,其特征在于,所述第一预充电路模块包括第一预充电阻、第三开关、第一二极管和第二二极管,其中,所述第一预充电阻与所述第三开关并联,所述第一预充电阻一端通过所述第一开关连接所述第二电池包,所述第一预充电阻另一端连接所述第一二极管的正极,所述第一二极管的负极连接所述调压电路模块,所述第二二极管的负极通过所述第一开关连接所述第二电池包,所述第二二极管的正极连接所述调压电路模块。
- 根据权利要求1-3任一项所述的充放电电路,其特征在于,所述调压电路模块包括功率因数控制PFC电路和DC/DC电路,其中,所述功率因数控制PFC电路连接所述DC/DC电路,所述整流电路模块串联所述功率因数控制PFC电路,所述DC/DC电路连接所述第一电池包,并通过所述第二开关连接所述第二电池包,所述功率因数控制PFC电路和所述DC/DC电路连接所述整车控制器;所述功率因数控制PFC电路用于电压的功率因数校正,所述DC/DC电路用于调整电压值。
- 根据权利要求4所述的充放电电路,其特征在于,所述充放电电路还包括第二预充电路模块,所述第二预充电路模块连接所述整车控制器,所述第二预充电路模块包括第二预充电阻、第四开关和第五开关,所述整流电路模块包括整流桥,其中,所述第二预充电阻外接输入电源,所述第二预充电阻还与所述第四开关并联后连接所述第五开关,所述第五开关连接所述整流桥;所述第二预充电阻用于保护所述整流电路模块,当整车处于充电状态时,所述第五开关用于控制充电电路的连接或断开。
- 一种车载充放电***,包括输入电源,其特征在于,还包括权利要求1-5任一项所述的充放电电路,其中,所述输入电源连接所述整流电路模块,所述整流电路模块串联所述调压电路模块,所述调压电路模块连接所述第一电池包,所述第一电池包连接所述负载,所述第二电池包通过所述第二开关连接所述负载和所述调压电路模块的一端,所述第二电池包通过所述第一开关连接所述调压电路模块的另一端,所述调压电路模块、所述第一电池包、所述第一开关、所述第二开关、所述第二电池包均连接所述整车控制器;所述第一电池包包括第一内部开关,所述第二电池包包括第二内部开关;所述整车控制器用于控制所述第一开关、所述第二开关、所述第一内部开关以及所述第二内部开关;所述输入电源为所述第一电池包和所述第二电池包供电,所述整车控制器还用于控制所述调压电路模块的电压转换率;当整车处于充电状态时,所述整车控制器用于控制所述第一开关和所述第二开关断开,所述第一内部开关闭合,所述整流电路模块用于连接输入电源且将交流电转换为直流电以实现对所述第一电池包充电;或,所述整车控制器用于控制所述第一开关和所述第一内部开关断开,所述第二开关和所述第二内部开关闭合,所述整流电路模块用于连接所述输入电源且将交流电转换为直流电以实现对所述第二电池包充电;当整车处于行车状态时,所述整车控制器用于控制所述第一开关和所述第二开关断开,所述第一内部开关闭合,以实现所述第一电池包单独为所述负载供电;或,所述整车控制器用于控制所述第一开关和所述第一内部开关断开,所述第二开关和所述第二内部开关闭合,以实现所述第二电池包单独为所述负载供电;或,所述整车控制器用于控制所述第二开关断开,所述第一开关、所述第一内部开关和所述第二内部开关闭合,所述调压电路模块用于将所述第二电池包的电压转换为跟所述第一电池包相同,以实现所述第一电池包和所述第二电池包同时为所述负载供电。
- 一种充电方法,其特征在于,应用于权利要求6所述的车载充放电***,所述方法包括:当检测到整车处于充电状态时,确定所述第一电池包和所述第二电池包的充电需求,所述第一电池包包括第一内部开关,所述第二电池包包括第二内部开关;根据所述充电需求控制所述整流电路模块和所述调压电路模块将充电电压调至预设充电电压;控制所述第一内部开关和所述第二内部开关以及所述第二开关和所述第一开关,对所述第一电池包或所述第二电池包进行充电。
- 根据权利要求7所述的方法,其特征在于,所述控制所述第一内部开关和所述第二内部开关以及所述第二开关和所述第一开关,对所述第一电池包或所述第二电池包进行充电,包括:当所述第一电池包有充电需求时,断开所述第一开关和所述第二开关,闭合所述第一内部开关,对所述第一电池包充电;当所述第二电池包有充电需求时,断开所述第一开关和所述第一内部开关,闭合所述第二开关和所述第二内部开关,对所述第二电池包进行充电;当所述第一电池包和所述第二电池包均有充电需求时,根据预设策略为所述第一电池包或所述第二电池包进行充电,所述预设策略包括预先设置的充电先后顺序或对检测出性能较优的电池包优先充电。
- 一种放电方法,其特征在于,应用于权利要求6所述的车载充放电***,所述方法包括:当检测到所述负载的供电需求时,检测所述第一电池包和所述第二电池包的电量;根据所述电量控制所述第一电池包和/或所述第二电池包为所述负载供电,所述第一电池包包括第一内部开关,所述第二电池包包括第二内部开关。
- 根据权利要求9所述的方法,其特征在于,所述根据所述电量控制所述第一电池包和/或所述第二电池包为所述负载供电,包括:当所述第一电池包的电量大于预设电量,所述第二电池包的电量小于预设电量时,断开所述第一开关和所述第二开关,闭合所述第一内部开关,以控制所述第一电池包为所述负载供电,所述预设电量为给所述负载供电的最小电量;当所述第一电池包的电量小于所述预设电量,所述第二电池包的电量大于所述预设电量时,断开所述第一开关和所述第一内部开关,闭合所述第二开关和所述第二内部开关,以控制所述第二电池包为所述负载供电;当所述第一电池包和所述第二电池包的电量均大于所述预设电量时,断开所述第二开关,闭合所述第一开关、所述第一内部开关和所述第二内部开关,以控制所述第一电池包和所述第二电池包同时为所述负载供电。
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