WO2023168634A1 - 动力电池电压调节系统及其控制方法和控制装置 - Google Patents
动力电池电压调节系统及其控制方法和控制装置 Download PDFInfo
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- WO2023168634A1 WO2023168634A1 PCT/CN2022/080004 CN2022080004W WO2023168634A1 WO 2023168634 A1 WO2023168634 A1 WO 2023168634A1 CN 2022080004 W CN2022080004 W CN 2022080004W WO 2023168634 A1 WO2023168634 A1 WO 2023168634A1
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- bridge arm
- switch
- voltage
- power battery
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- 238000000034 method Methods 0.000 title claims abstract description 91
- 230000033228 biological regulation Effects 0.000 title claims abstract description 79
- 238000007599 discharging Methods 0.000 abstract description 10
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- 238000010586 diagram Methods 0.000 description 11
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- 230000009467 reduction Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
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- 238000010168 coupling process Methods 0.000 description 3
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
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- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 229910052987 metal hydride Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
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Classifications
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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
- 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
- B60L53/24—Using the vehicle's propulsion converter for charging
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
- H02J7/04—Regulation of charging current or voltage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/90—Vehicles comprising electric prime movers
- B60Y2200/91—Electric vehicles
-
- 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
-
- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
- the present application relates to the field of battery technology, and in particular to a power battery voltage regulation system and its control method and control device.
- power batteries Due to its advantages such as high energy density, rechargeability, safety and environmental protection, power batteries are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields. With the development of battery technology, the various performances of power batteries are constantly improving, especially the voltage of power batteries, which has generally been greatly improved.
- Embodiments of the present application provide a power battery voltage adjustment system and its control method and control device, which can flexibly adjust the charge and discharge voltage of the power battery to meet the charging voltage or discharge voltage requirements of the power battery in different scenarios.
- this application provides a control method for a power battery voltage regulation system.
- the power battery voltage regulation system includes a power battery, a switch module, a charge and discharge interface, and a motor;
- the switch module includes a first switch, a second switch, and a second switch.
- the connection points of the upper bridge arm and the lower bridge arm of each bridge arm in the first bridge arm group are connected to all the inductors in the motor in a one-to-one correspondence.
- the connection point of the upper bridge arm and the lower bridge arm is connected to the three-phase center point of the motor; one end of the first switch is connected to the positive electrode of the power battery, and the other end of the first switch is connected to the One end of the third switch is connected to and connected to all the inductors in the motor through the upper bridge arm of the first bridge arm group.
- the other end of the third switch is connected to one end of the fourth switch and connected to all the inductors in the motor through the upper bridge arm of the first bridge arm group.
- the upper bridge arm of the second bridge arm is connected to the three-phase center point of the motor, the other end of the fourth switch is connected to the positive electrode of the charge and discharge interface; one end of the second switch is connected to the negative electrode of the power battery connected, the other end of the second switch is connected to one end of the fifth switch, and is connected to all the inductors in the motor through the lower bridge arm of the first bridge arm group, and through the lower bridge arm of the second bridge arm
- the arm is connected to the three-phase center point of the motor, and the other end of the fifth switch is connected to the negative pole of the charge and discharge interface;
- the control method includes: obtaining a first voltage and a second voltage, the first voltage is the voltage of the power battery, the second voltage is the maximum output voltage of the charging equipment, and the charging equipment is used to connect the charging and discharging interface; when the first voltage is less than the second voltage, all the The first switch, the second switch, the third switch, the fourth switch and the fifth switch are turned on, and all bridge arms in the first bridge arm
- the control method of the power battery voltage regulation system can control the conduction and disconnection of different switches in the circuit structure under different circumstances, so that the charging equipment can be used without changing the existing charging facilities. It can charge a power battery with a voltage lower than the maximum output voltage of the charging device, and can also charge a power battery with a higher voltage than the maximum output voltage of the charging device.
- This control method can flexibly adjust the charging voltage of the power battery in different scenarios, which can not only solve the compatibility problem of external charging equipment, but also make the charging process of the power battery not limited by the maximum output voltage of the charging equipment.
- the control method when the first voltage is greater than or equal to the second voltage, the control method further includes: controlling the fourth switch, the fifth switch, the first switch during a first period.
- the lower bridge arm of the bridge arm group and the upper bridge arm of the second bridge arm are connected, and the third switch, the upper bridge arm of the first bridge arm group, and the lower bridge arm of the second bridge arm are disconnected.
- the control of the first switch, the second switch, the fourth switch, the fifth switch, the upper bridge arm of the first bridge arm group and the upper bridge of the second bridge arm arm is turned on, and the third switch, the lower bridge arm of the first bridge arm group, and the lower bridge arm of the second bridge arm are disconnected, including: controlling the first switch, the second switch, The fourth switch, the fifth switch, the upper arm of the first bridge arm group and the upper bridge arm of the second bridge arm are conductive, and the third switch, the lower bridge arm of the first bridge arm group are conductive.
- the bridge arm and the lower bridge arm of the second bridge arm are disconnected; wherein, the first period and the second period are a first period, and in the first period, the first period is in the second period. before the period.
- the embodiments provided by this application can flexibly adjust the charging voltage of the power battery according to the relationship between the charging equipment and the voltage of the power battery without changing the circuit structure.
- the circuit structure of the power battery voltage adjustment system itself is used for the motor. Providing energy, the power battery can be boosted and charged by turning on and off different switches in the same circuit.
- the first time period and the second time period are alternately distributed.
- this application provides a control method for a power battery voltage regulation system.
- the power battery voltage regulation system includes a power battery, a switch module, a charge and discharge interface and a motor;
- the switch module includes a first switch, a second switch, third switch, fourth switch, fifth switch, first bridge arm group and second bridge arm; each bridge arm in the first bridge arm group and the second bridge arm respectively includes an upper bridge arm and the lower bridge arm.
- the connection points of the upper bridge arm and the lower bridge arm of each bridge arm in the first bridge arm group are connected to all the inductors in the motor in a one-to-one correspondence.
- the connection point of the upper bridge arm and the lower bridge arm is connected to the three-phase center point of the motor; one end of the first switch is connected to the positive electrode of the power battery, and the other end of the first switch is connected to the One end of the third switch is connected to and connected to all the inductors in the motor through the upper bridge arm of the first bridge arm group.
- the other end of the third switch is connected to one end of the fourth switch and connected to all the inductors in the motor through the upper bridge arm of the first bridge arm group.
- the upper bridge arm of the second bridge arm is connected to the three-phase center point of the motor, the other end of the fourth switch is connected to the positive electrode of the charge and discharge interface; one end of the second switch is connected to the negative electrode of the power battery connected, the other end of the second switch is connected to one end of the fifth switch, and is connected to all the inductors in the motor through the lower bridge arm of the first bridge arm group, and through the lower bridge arm of the second bridge arm
- the arm is connected to the three-phase center point of the motor, and the other end of the fifth switch is connected to the negative pole of the charge and discharge interface;
- the control method includes: obtaining a first voltage and a third voltage, the first voltage is the voltage of the power battery, the third voltage is the request voltage of the load device, and the load device is used to connect the charge and discharge interface; when the first voltage is greater than the third voltage, the The fourth switch, the fifth switch, the lower arm of the first bridge arm group and the upper bridge arm of the second bridge arm are conductive, and the third switch,
- the bridge arm is disconnected from the lower bridge arm of the second bridge arm; or, when the first voltage is less than the third voltage, the first switch, the second switch, and the fourth switch are controlled. , the fifth switch, the upper bridge arm of the first bridge arm group and the upper bridge arm of the second bridge arm are connected, the third switch, the lower bridge arm of the first bridge arm group and The lower bridge arm of the second bridge arm is disconnected.
- the control method of the power battery voltage regulation system provided by the embodiment of the present application can adapt to various requirements of different voltages without changing the circuit structure by controlling the on and off of different switches in the circuit structure under different circumstances.
- load equipment so that the power battery voltage regulation system can not only provide electric energy for load equipment with a demand voltage higher than the power battery voltage, but also provide electric energy for load equipment with a demand voltage lower than the power battery voltage, thereby enabling flexible adjustment of power in different scenarios.
- the discharge voltage of the battery provides power for a variety of load devices.
- the control method further includes: controlling the first switch, the second switch, the upper arm of the first bridge arm group and the lower arm of the second bridge arm in a third period.
- the bridge arm is turned on, and the third switch, the lower bridge arm of the first bridge arm group, and the upper bridge arm of the second bridge arm are disconnected; when the first voltage is greater than the third voltage
- the fourth switch, the fifth switch, the lower bridge arm of the first bridge arm group and the upper bridge arm of the second bridge arm are controlled to be conductive
- the third switch, the first bridge arm Disconnecting the upper bridge arm of the bridge arm group and the lower bridge arm of the second bridge arm includes: when the first voltage is greater than the third voltage, controlling the fourth switch, the The fifth switch, the lower arm of the first bridge arm group, and the upper bridge arm of the second bridge arm are connected, and the third switch, the upper bridge arm of the first bridge arm group, and the third bridge arm are connected.
- the lower bridge arm of the two bridge arms is disconnected; wherein the third period and the fourth period are a second period,
- the embodiments provided by this application can flexibly adjust the output voltage according to the needs of the load device without changing the circuit structure.
- the circuit structure of the power battery voltage regulation system itself is used to provide energy to the motor, and different switches can be used in the same circuit.
- the conduction and disconnection realize the voltage reduction and discharge of the power battery.
- control method further includes: controlling the first switch, the second switch, the upper arm of the first bridge arm group and the lower arm of the second bridge arm in a third period.
- the bridge arm is turned on, and the third switch, the lower bridge arm of the first bridge arm group, and the upper bridge arm of the second bridge arm are disconnected; when the first voltage is less than the third voltage
- control the first switch, the second switch, the fourth switch, the fifth switch, the upper arm of the first bridge arm group and the upper arm conductor of the second bridge arm when, control the first switch, the second switch, the fourth switch, the fifth switch, the upper arm of the first bridge arm group and the upper arm conductor of the second bridge arm.
- the third switch, the lower bridge arm of the first bridge arm group and the lower bridge arm of the second bridge arm are disconnected, including: when the first voltage is less than the third voltage,
- the fifth period controls the first switch, the second switch, the fourth switch, the fifth switch, the upper bridge arm of the first bridge arm group and the upper bridge arm of the second bridge arm.
- the third switch, the lower bridge arm of the first bridge arm group and the lower bridge arm of the second bridge arm are disconnected; wherein, the third period and the fifth period are the third period, in the third period, the third period is before the fifth period.
- the embodiments provided by this application can flexibly adjust the output voltage according to the needs of the load device without changing the circuit structure.
- the circuit structure of the power battery voltage regulation system itself is used to provide energy to the motor, and different switches can be used in the same circuit.
- the conduction and disconnection realize the boost discharge of the power battery.
- the third time period and the fourth time period are alternately distributed.
- the third time period and the fifth time period are distributed alternately.
- the application provides a power battery voltage regulation system.
- the power battery voltage regulation system includes a power battery, a switch module, a charge and discharge interface, and a motor; the switch module includes a first switch, a second switch, and a third switch. Three switches, a fourth switch, a fifth switch, a first bridge arm group and a second bridge arm; each of the first bridge arm group and the second bridge arm includes an upper bridge arm and a lower bridge respectively. arms, the connection points of the upper bridge arm and the lower bridge arm of each bridge arm in the first bridge arm group are connected to all the inductors in the motor in one-to-one correspondence, and the upper bridge arm in the second bridge arm is connected in a one-to-one correspondence.
- connection point between the bridge arm and the lower bridge arm is connected to the three-phase center point of the motor; one end of the first switch is connected to the positive electrode of the power battery, and the other end of the first switch is connected to the third switch
- One end of the third switch is connected to one end of the fourth switch and connected to all the inductors in the motor through the upper arm of the first bridge arm group.
- the other end of the third switch is connected to one end of the fourth switch and connected to the second bridge arm through the second bridge arm.
- the upper bridge arm is connected to the three-phase center point of the motor, the other end of the fourth switch is connected to the positive electrode of the charge and discharge interface; one end of the second switch is connected to the negative electrode of the power battery, so The other end of the second switch is connected to one end of the fifth switch, and is connected to all inductors in the motor through the lower bridge arm of the first bridge arm group, and is connected to all the inductors through the lower bridge arm of the second bridge arm.
- the three-phase center points of the motor are connected, and the other end of the fifth switch is connected to the negative pole of the charge and discharge interface.
- the power battery voltage regulation system provided by the embodiment of the present application fully considers the demand for voltage regulation during charging and discharging of the power battery under different circumstances.
- Switches are set at key points in the charging and discharging circuit of the power battery, and the conduction of different switches is controlled by and disconnected, forming loops of direct charging, boost charging, boost discharge and buck discharge in the same circuit structure, so that the charge and discharge voltage of the power battery can be flexibly adjusted without changing the circuit structure to meet different scenarios.
- the charging voltage or discharge voltage requirements of the power battery is not limited to be used.
- the present application provides a control device for a power battery voltage regulation system, including: a processor, the processor being configured to execute the control method as described in any embodiment of the first aspect, or to execute the above The control method according to any embodiment of the second aspect.
- the present application provides a power device, including the power battery voltage regulation system as described in the third aspect, the power battery voltage regulation system being used to charge the power battery or for the power battery. Discharge, the power battery is used to provide electrical energy for the power device.
- Figure 1 is a schematic diagram of an application architecture of the charging method provided by an embodiment of the present application.
- Figure 2 is a schematic block diagram of a power battery voltage regulation system provided by an embodiment of the present application.
- Figure 3 is a schematic flow chart of a control method for a power battery voltage regulation system provided by an embodiment of the present application
- Figure 4 is a schematic diagram of a charging circuit of the power battery voltage regulation system provided by an embodiment of the present application.
- FIG. 5 is a schematic diagram of another charging circuit of the power battery voltage regulation system provided by the embodiment of the present application.
- Figure 6 is a schematic flow chart of another control method of a power battery voltage regulation system provided by an embodiment of the present application.
- FIG. 7 is a schematic diagram of another charging circuit of the power battery voltage regulation system provided by the embodiment of the present application.
- Figure 8 is a schematic flow chart of another control method of a power battery voltage regulation system provided by an embodiment of the present application.
- FIG. 9 is a schematic diagram of another charging circuit of the power battery voltage regulation system provided by an embodiment of the present application.
- FIG. 10 is a schematic diagram of another charging circuit of the power battery voltage regulation system provided by the embodiment of the present application.
- Figure 11 is a schematic flow chart of another control method of a power battery voltage regulation system provided by an embodiment of the present application.
- Figure 12 is a schematic diagram of another charging circuit of the power battery voltage regulation system provided by the embodiment of the present application.
- FIG. 13 is a schematic block diagram of a control device of a power battery voltage regulation system 10 provided by an embodiment of the present application.
- the power battery voltage regulation system includes a power battery, a switch module, a charge and discharge interface and a motor.
- a switch module By controlling different switches in the switch module On and off, direct charging or boost charging can be achieved in different scenarios, or boost discharge or buck discharge can be achieved in different scenarios.
- the power battery in the embodiment of the present application can be a lithium-ion battery, a lithium metal battery, a lead-acid battery, a nickel separator battery, a nickel-metal hydride battery, a lithium-sulfur battery, a lithium-air battery, a sodium-ion battery, etc., which are not limited here.
- the battery in the embodiment of the present application can be a single cell, a battery module or a battery pack, which is not limited here.
- batteries can be used in power devices such as cars and ships. For example, it can be used in power vehicles to power the motors of power vehicles and serve as the power source of electric vehicles.
- the battery can also power other electrical devices in electric vehicles, such as in-car air conditioners, car players, etc.
- the drive motor and its control system are one of the core components of new energy vehicles, and their driving characteristics determine the main performance indicators of the vehicle.
- the motor drive system of new energy vehicles is mainly composed of an electric motor (i.e., motor), a power converter, a motor controller (such as an inverter), various detection sensors, and a power supply.
- An electric motor is a rotating electromagnetic machine that operates on the principle of electromagnetic induction and is used to convert electrical energy into mechanical energy. During operation, it absorbs electrical power from the electrical system and outputs mechanical power to the mechanical system.
- FIG. 1 is a schematic diagram of an application architecture applicable to the charging method according to the embodiment of the present application.
- the application architecture includes a battery management system (Battery Management System, BMS) 100 and a charging pile 200.
- BMS Battery Management System
- the BMS 100 can be connected to the charging pile 200 through a communication line. , to interact with the charging pile 200.
- the communication line can be a Controller Area Network (Controller Area Network, CAN) communication line or a daisy chain communication line.
- CAN Controller Area Network
- the BMS 100 is the BMS of the power battery, which is a battery that provides power source for electrical devices.
- the power battery may be a power storage battery.
- the power battery can be a lithium-ion battery, a lithium metal battery, a lead-acid battery, a nickel separator battery, a nickel-metal hydride battery, a lithium-sulfur battery, a lithium-air battery or a sodium-ion battery.
- the power battery in the embodiment of the present application can be a cell/battery cell, or a battery module or a battery pack, which is not specifically limited in the embodiment of the present application.
- the electrical device may be a vehicle, a ship, a spacecraft, etc., which is not limited in the embodiments of the present application.
- BMS is a control system that protects the safety of power batteries and implements functions such as charge and discharge management, high-voltage control, battery protection, battery data collection, and battery status evaluation.
- the BMS can be integrated with the power battery and installed in the same equipment/device, or the BMS can also be installed outside the power battery as an independent equipment/device.
- the charging pile 200 also called a charger, is a device for charging the power battery.
- the charging pile can output charging power according to the charging requirements of BMS100 to charge the power battery.
- the charging pile 200 can output the voltage and current according to the demand voltage and demand current sent by the BMS 100 .
- the power battery voltage regulation system 10 includes a power battery 11, a switch module 12, a charge and discharge interface 13 and a motor 14; the switch module 12 includes a first switch K1, a second switch K2, a third switch K3, and a third switch K3.
- each bridge arm in the first bridge arm group 121 and the second bridge arm 122 includes an upper bridge arm and a lower bridge arm respectively,
- the connection points of the upper bridge arm and the lower bridge arm of each bridge arm in the first bridge arm group 121 are connected to all the inductors in the motor 14 in a one-to-one correspondence.
- the upper bridge arm and the lower bridge arm in the second bridge arm 122 are connected in a one-to-one correspondence.
- connection point of the arm is connected to the three-phase center point of the motor 14; one end of the first switch K1 is connected to the positive electrode of the power battery 11, the other end of the first switch K1 is connected to one end of the third switch K3, and through the first bridge arm
- the upper bridge arm of the group 121 is connected to all the inductors in the motor 14 respectively, the other end of the third switch K3 is connected to one end of the fourth switch K4, and the upper bridge arm of the second bridge arm 122 is connected to the three-phase center of the motor 14 point connection, the other end of the fourth switch K4 is connected to the positive electrode of the charge and discharge interface 13; one end of the second switch K2 is connected to the negative electrode of the power battery 11, the other end of the second switch K2 is connected to one end of the fifth switch K5, and
- the lower bridge arm of the first bridge arm group 121 is connected to all the inductors in the motor 14 respectively, and the lower bridge arm of the second bridge arm 122 is connected to the three-phase center point of the motor 14.
- the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5 in the switch module 12 may be relay switches, and the control module controls the conduction or disconnection of these switches to form Different circuits.
- the first switch K1 is used to connect or disconnect the parts of the power battery voltage regulation system 10 except the power battery 11 and the positive electrode of the battery;
- the second switch K2 is used to connect or disconnect the parts of the power battery voltage regulation system 10 except the power battery 11 .
- the connection between other parts other than the power battery 11 and the negative electrode of the battery; the third switch K3 is used to connect or disconnect the second bridge arm 122 and the charge and discharge interface 13, and the connection between the first bridge arm group 121 and the power battery 11 ;
- the fourth switch K4 is used to turn on or off the connection between the parts of the power battery voltage regulation system 10 except the charge and discharge interface 13 and the positive electrode of the charge and discharge interface 13;
- the fifth switch K5 is used to turn on or off. Open the connection between the parts of the power battery voltage regulation system 10 except the charge and discharge interface 13 and the negative electrode of the charge and discharge interface 13 .
- the first bridge arm group 121 and the second bridge arm 122 can be implemented by an inverter in the motor 14 drive system, where the inverter can use the bridge arm of an insulated gate bipolar transistor (IGBT). switch implementation.
- the number of bridge arms in the first bridge arm group 121 is the same as the number of inductors in the motor 14 .
- the inverter includes a three-phase bridge arm, that is, a U-phase bridge arm, a V-phase bridge arm, and a W-phase bridge arm.
- each phase bridge arm in the three-phase bridge arm has an upper bridge arm and a lower bridge arm, and the upper bridge arm and the lower bridge arm are respectively provided with switch units, that is, the first bridge arm group 121 respectively includes U-phase bridge arms.
- the second bridge arm 122 also has an upper bridge arm and a lower bridge arm, and the upper bridge arm and the lower bridge arm are respectively provided with switch units. That is, the second bridge arm 122 includes an upper bridge arm switch 1221 and a lower bridge arm switch 1222 .
- the motor 14 may include multiple inductors. Taking the three-phase motor 14 as an example, it may include three inductors. Specifically, it may include: an inductor 141 connected to the U-phase bridge arm, an inductor 142 connected to the V-phase bridge arm, and an inductor connected to the W-phase bridge arm. The inductor 143 is connected to the phase bridge arm.
- one end of the inductor 141 is connected to the connection point of the upper bridge arm and the lower bridge arm of the U-phase bridge arm
- one end of the inductor 142 is connected to the connection point of the upper bridge arm and the lower bridge arm of the V-phase bridge arm
- one end of the inductor 143 Connected to the connection point of the upper bridge arm and the lower bridge arm in the W-phase bridge arm.
- the other end of the inductor 141 , the other end of the inductor 142 and the other end of the inductor 143 are connected together, and this connection point is the three-phase center point of the motor 14 .
- the motor 14 is not limited to a three-phase motor 14, but may also be a six-phase motor 14, etc.
- the six-phase motor 14 may include a six-phase bridge arm.
- the power battery voltage regulation system 10 may also be provided with a sixth switch K6, a seventh switch K7, a first capacitor C1, a second capacitor C2 and a resistor R.
- the sixth switch K6 is disposed between the three-phase center point of the motor 14 and the connection point of the upper bridge arm and the lower bridge arm of the second bridge arm 122, and is used to cut off or connect the three-phase center point of the motor 14 and the second bridge arm. A high voltage connection between the connection points of the upper and lower arms of arm 122. In this embodiment of the present application, the sixth switch K6 may always be in a closed state.
- the seventh switch K7 is connected in series with the resistor R and then in parallel with both ends of the second switch K2.
- One end of the first capacitor C1 is connected to the positive electrode of the power battery 11 through the first switch K1, and the other end is connected to the power battery 11 through the second switch K2.
- the negative electrode of the second capacitor C2 is connected to the positive electrode of the charge and discharge interface 13 through the fourth switch K4, and the other end is connected to the negative electrode of the charge and discharge interface 13 through the fifth switch K5.
- the first switch K1 and the seventh switch K7 can be turned on first to precharge the first capacitor C1 and the second capacitor C2 to avoid higher voltages from causing damage to the circuit.
- a preset time can be set for the conduction of the seventh switch K7. After the preset time expires, the second switch K2 is turned on and the seventh switch K7 is turned off.
- the seventh switch K7 before turning on the second switch K2, the seventh switch K7 may be turned on within a preset time. After the preset time is over, the second switch K2 is turned on and the seventh switch K7 is turned off.
- the second capacitor C2 is used to stabilize the input voltage of the charge and discharge interface 13 and absorb the peak voltage when the second bridge arm 122 is disconnected to avoid damage to the second bridge arm 122 .
- the first capacitor C1 and the second capacitor C2 can both stabilize voltage and filter out noise.
- the power battery voltage regulation system 10 provided by the embodiment of the present application fully considers the voltage regulation requirements of the power battery 11 when charging and discharging under different circumstances. Switches are set at key points in the charge and discharge circuit of the power battery 11, and by controlling different switches On and off, direct charging, boost charging, boost discharge and buck discharge loops are formed in the same circuit structure, so that the charge and discharge voltage of the power battery 11 can be flexibly adjusted without changing the circuit structure. Meet the charging voltage or discharging voltage requirements of the power battery 11 in different scenarios.
- the present application also provides a control method for the power battery voltage regulation system 10, as shown in Figures 3 to 7.
- FIG. 3 is a schematic flow chart of a control method of the power battery voltage regulation system 10 provided by the embodiment of the present application, showing the schematic flow of the power battery voltage regulation system 10 during the charging process.
- the power battery voltage regulation system The control method of 10 includes the following steps.
- the first voltage is the voltage of the power battery 11
- the second voltage is the maximum output voltage of the charging equipment.
- the charging equipment is used to connect to the charging and discharging interface 13.
- the above steps may be performed by the control module.
- the control module obtains the first voltage and the second voltage, that is, the control module obtains the voltage of the power battery 11 and the maximum output voltage of the charging device, and compares the two to determine a charging method for the power battery 11 .
- the charging device is a device that provides electric energy to the power battery 11.
- the charging device may be a charging pile.
- the charging device can provide sufficient voltage for the charging process of the power battery 11, so the power battery 11 can be charged directly without adjusting the charging voltage.
- the control module controls the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5 in the power battery voltage regulation system 10 to conduct, so that the first bridge arm group 121 and the All of the two bridge arms 122 are disconnected to form a direct charging loop as shown in FIG. 4 .
- the charging equipment cannot provide sufficient voltage for the charging process of the power battery 11, so the charging voltage of the power battery 11 needs to be increased.
- the first switch K1, the second switch K2, the fourth switch K4, the fifth switch K5, the upper arm of the first bridge arm group 121 and the upper bridge arm of the second bridge arm 122 are controlled to be conductive, and the third The switch K3, the lower bridge arm of the first bridge arm group 121 and the lower bridge arm of the second bridge arm 122 are disconnected to form a boost charging circuit as shown in FIG. 5 .
- the charging equipment and the motor 14 with pre-stored energy jointly provide electric energy for the power battery 11.
- the voltage provided by the charging equipment and the voltage provided by the motor 14 are superimposed, and the superimposed voltage is greater than the power battery 11 voltage, the power battery 11 can be charged.
- the motor 14 can store energy in advance through the circuit in the power battery voltage regulation system 10 , or an external device can provide energy to the motor 14 .
- the device for obtaining the first voltage and the second voltage may be a BMS in the control module, and the device for controlling the conduction or disconnection of the switch in the switch module 12 may be a micro control unit (micro control unit) in the control module. MCU).
- the BMS can compare the obtained first voltage and the second voltage, determine the charging method, and communicate with the MCU. For example, when the first voltage is less than the second voltage, the BMS sends the first information to the MCU. The first information is used to instruct charging by direct charging. Then the MCU can control the corresponding switch to turn on or off according to the first information. , forming a charging circuit for direct charging.
- the BMS sends second information to the MCU.
- the second information is used to instruct charging by boost charging, and the MCU can control the corresponding switch according to the second information. Turn on or off to form a charging circuit for boost charging.
- the charging voltage required by the power battery may also be different. Therefore, when the BMS sends the second information to the MCU, it can also send the target voltage of the power battery to the MCU at the same time.
- the target voltage is the power battery.
- the voltage required in the current charging stage may be the same as the first voltage obtained by the BMS in step S1, or may be different.
- the control method of the power battery voltage regulation system 10 can control the conduction and disconnection of different switches in the circuit structure under different circumstances, so that the charging equipment can be adjusted without changing the existing charging facilities. It is possible to charge the power battery 11 whose voltage is lower than the maximum output voltage of the charging device, or to charge the power battery 11 whose voltage is higher than the maximum output voltage of the charging device.
- This control method can flexibly adjust the charging voltage of the power battery 11 in different scenarios, which can not only solve the compatibility problem of external charging equipment, but also make the charging process of the power battery 11 not limited by the maximum output voltage of the charging equipment.
- the control method further includes: S121, controlling the fourth switch K4, the fifth switch K5, and the first bridge arm in the first period
- the lower bridge arm of the group 121 and the upper bridge arm of the second bridge arm 122 are connected, and the third switch K3 and the upper bridge arm of the first bridge arm group 121 and the lower bridge arm of the second bridge arm 122 are disconnected.
- Step S12 may be specifically: S122. Control the first switch K1, the second switch K2, the fourth switch K4, the fifth switch K5, the upper arm of the first bridge arm group 121 and the second bridge arm 122 in the second period. The upper bridge arm is turned on, and the third switch K3, the lower bridge arm of the first bridge arm group 121, and the lower bridge arm of the second bridge arm 122 are disconnected.
- the first period and the second period are the first period, and in the first period, the first period is before the second period.
- FIG. 6 shows a schematic flowchart of another control method of the power battery voltage regulation system 10 provided by the embodiment of the present application, that is, a control method in the case of boost charging the power battery 11 .
- the charging device and the motor 14 with pre-stored energy jointly provide electric energy for the power battery 11 .
- the energy pre-stored in the motor 14 can be used by the power battery voltage regulation system 10 itself. circuit to provide.
- control module can control the fourth switch K4, the fifth switch K5, the lower arm of the first bridge arm group 121 and the upper arm of the second bridge arm 122 to conduct, and the first switch K1 and the second switch K2 , the third switch K3, the upper bridge arm of the first bridge arm group 121 and the lower bridge arm of the second bridge arm 122 are disconnected to form a loop as shown in FIG. 7 .
- the charging device only provides electric energy to the motor 14, and the motor 14 stores energy through its own inductance.
- step S122 is to implement the control of turning on or off the switch in step S12 during the second period.
- the first period and the second period may constitute a first period. In a first period, the energy of the motor 14 is first stored in the first period, and then the increased charging voltage is provided to the power battery 11 in the second period.
- the embodiments provided by this application can flexibly adjust the charging voltage of the power battery 11 according to the relationship between the charging equipment and the voltage of the power battery 11 without changing the circuit structure, and at the same time utilize the circuit of the power battery voltage regulation system 10 itself
- the structure provides energy to the motor 14 and can achieve boost charging of the power battery 11 through the on and off of different switches in the same circuit.
- the first time period and the second time period are alternately distributed.
- the loops formed in the first period and the second period can be quickly and alternately conducted multiple times within a period of time, so that after the charging voltage of the power battery 11 rises to a predetermined value, it can continue to Charge the power battery 11.
- the first switches K1 and K1 can be retained during the time distributed in the first period.
- the second switch K2 is turned on, and only the upper bridge arm and the lower bridge arm of the first bridge arm group 121 are controlled to be alternately conductive to realize the alternate conduction of the current loop formed in the first period and the second period. In the loop shown in FIG. 7 , keeping the first switch K1 and the second switch K2 turned on will not affect the direction of the current in the loop.
- the present application also provides another control method for the power battery voltage regulation system 10, as shown in Figures 8 to 12. Based on the above-mentioned power battery voltage regulation system 10, this control method include the following steps.
- the first voltage is the voltage of the power battery 11
- the third voltage is the request voltage of the load device.
- the load device is used to connect to the charge and discharge interface 13.
- FIG. 8 is a schematic flow chart of another control method of the power battery voltage regulation system 10 provided by the embodiment of the present application, showing a schematic flow chart of the power battery voltage regulation system 10 during the discharge process.
- the control module obtains the first voltage and the third voltage, that is, obtains the voltage of the power battery 11 and the request voltage of the load device, and compares the two to determine the discharge mode of the power battery 11 .
- the load device is a device that consumes electric energy to operate.
- the load device may be a vehicle-mounted device.
- the fourth switch K4, the fifth switch K5, the lower bridge arm of the first bridge arm group 121 and the upper bridge arm of the second bridge arm 122 are controlled to be conductive, and the first switch K1, the second switch K2, the third switch K2 are controlled to be conductive.
- the switch K3, the upper bridge arm of the first bridge arm group 121, and the lower bridge arm of the second bridge arm 122 are disconnected to form a buck discharge circuit as shown in FIG. 9 .
- FIG. 9 only the motor 14 with energy stored in advance provides electric energy to the load device, and the energy stored in the motor 14 is controlled to provide a voltage that matches the requested voltage of the load device.
- the voltage of the power battery 11 is lower than the requested voltage of the load device, and the output voltage of the circuit needs to be increased to match the requested voltage of the load device.
- the first switch K1, the second switch K2, the fourth switch K4, the fifth switch K5, the upper arm of the first bridge arm group 121 and the upper bridge arm of the second bridge arm 122 are controlled to be conductive, and the third The switch K3, the lower bridge arm of the first bridge arm group 121 and the lower bridge arm of the second bridge arm 122 are disconnected to form a boost and discharge circuit as shown in FIG. 10 .
- the power battery 11 and the motor 14 with pre-stored energy jointly provide electric energy for the load device. That is to say, the voltage provided by the power battery 11 and the voltage provided by the motor 14 are superimposed, and the superimposed voltage can be compared with the load. When the requested voltage of the device matches, power can be provided to the load device.
- the motor 14 can store energy in advance through the circuit in the power battery voltage regulation system 10 , or an external device can provide energy to the motor 14 .
- the control module can first turn on the switches that do not affect the current loop, and only change the on or off of some switches to achieve changes in the current loop. Specifically, when the power battery 11 needs to be discharged, the control module first controls the first switch K1, the second switch K2, the fourth switch K4 and the fifth switch K5 to be turned on, and the other switches are turned off, and then according to the first voltage and the third voltage is determined. When the first voltage is greater than the third voltage, the lower arm of the first bridge arm group 121 and the upper bridge arm of the second bridge arm 122 are further controlled to be turned on, and the upper bridge arm of the first bridge arm group 121 is turned on.
- the bridge arm and the lower bridge arm of the second bridge arm 122 are disconnected to form a buck discharge loop; or, when the first voltage is less than the third voltage, the upper bridge arm and the second bridge arm of the first bridge arm group 121 are further controlled.
- the upper bridge arm of the bridge arm 122 is turned on, and the lower bridge arm of the first bridge arm group 121 and the lower bridge arm of the second bridge arm 122 are disconnected to form a boosting and discharging circuit. That is to say, the steps of controlling the first voltage and the third voltage by the control module and the steps of controlling the conduction of the first switch K1, the second switch K2, the fourth switch K4 and the fifth switch K5 are not distinguished in order.
- the device for obtaining the first voltage and the third voltage may be a BMS in the control module, and the device for controlling the on or off of the switch in the switch module 12 may be an MCU in the control module.
- the BMS compares the obtained first voltage and the third voltage, determines the discharge mode, and communicates with the MCU. For example, when the first voltage is greater than the third voltage, the BMS sends third information to the MCU. The third information is used to instruct the discharge to be performed in a step-down discharge manner. The MCU can control the corresponding switch to be turned on or off based on the third information. Open, forming a discharge circuit for buck discharge. Similarly, when the first voltage is less than the third voltage, the BMS sends the fourth information to the MCU. The fourth information is used to instruct the discharge by boost discharge, and the MCU can control the corresponding switch to turn on according to the fourth information. Or disconnected to form a discharge circuit for boost discharge.
- the BMS acquires the first voltage and the third voltage and communicates with the MCU.
- the BMS can send fifth information to the MCU, and the fifth information is used to instruct the formation of a discharge loop.
- the MCU receives the fifth information and controls the switches that do not affect the current loop to be turned on, that is, it controls the first switch K1, the second switch K2, the fourth switch K4, and the fifth switch K5 to be turned on, and the other switches are turned off.
- the BMS determines the discharge mode according to the first voltage and the third voltage, and instructs the MCU to control the corresponding switch to turn on or off through the third information or the fourth information to form a corresponding discharge circuit.
- the control method of the power battery voltage regulation system 10 can adapt to various demand voltages without changing the circuit structure by controlling the on and off of different switches in the circuit structure under different circumstances.
- load equipment so that the power battery voltage regulation system 10 can not only provide electric energy for the load equipment whose demand voltage is higher than the voltage of the power battery 11, but also can provide electric energy for the load equipment whose demand voltage is lower than the voltage of the power battery 11, thereby realizing the application in different scenarios.
- the discharge voltage of the power battery 11 can be flexibly adjusted to provide electric energy for a variety of load equipment.
- control method provided by the embodiment of the present application further includes: S23. Controlling the first switch K1, the second switch K2, and the upper arm of the first bridge arm group 121 in the third period. and the lower bridge arm of the second bridge arm 122 are connected, and the third switch K3, the lower bridge arm of the first bridge arm group 121, and the upper bridge arm of the second bridge arm 122 are disconnected.
- Step S21 may be specifically: S211.
- the upper bridge arm is turned on, and the third switch K3, the upper bridge arm of the first bridge arm group 121, and the lower bridge arm of the second bridge arm 122 are disconnected.
- the third period and the fourth period are the second period, and in the second period, the third period is before the fourth period.
- FIG. 11 shows a schematic flowchart of another control method of the power battery voltage regulation system 10 provided by the embodiment of the present application, that is, a control method of the power battery 11 under reduced voltage charging.
- the motor 14 with pre-stored energy provides electrical energy to the load device.
- the energy pre-stored in the motor 14 can be provided by the circuit of the power battery voltage regulation system 10 itself.
- control module can control the first switch K1, the second switch K2, the upper arm of the first bridge arm group 121 and the lower bridge arm of the second bridge arm 122 to conduct, and the third switch K3 and the fourth switch K4. , the fifth switch K5, the lower bridge arm of the first bridge arm group 121 and the upper bridge arm of the second bridge arm 122 are disconnected to form a loop as shown in FIG. 12 .
- the power battery 11 only provides electric energy to the motor 14, and the motor 14 stores energy through its own inductance.
- step S211 is to realize the control of turning on or off the switch in step S21 in the fourth period.
- the third period and the fourth period may form a second period. In a second period, the energy of the motor 14 is first stored in the third period, and then the reduced discharge voltage is provided to the load device in the fourth period.
- the embodiments provided by this application can flexibly adjust the output voltage according to the needs of the load device without changing the circuit structure.
- the circuit structure of the power battery voltage regulation system 10 itself is used to provide energy for the motor 14, which can be passed in the same circuit.
- the on and off of different switches realize the voltage reduction and discharge of the power battery 11 .
- control method provided by the embodiment of the present application further includes: S23. Controlling the first switch K1, the second switch K2, and the upper arm of the first bridge arm group 121 in the third period. and the lower bridge arm of the second bridge arm 122 are connected, and the third switch K3, the lower bridge arm of the first bridge arm group 121, and the upper bridge arm of the second bridge arm 122 are disconnected.
- Step S22 may be specifically: S221.
- the upper bridge arm and the upper bridge arm of the second bridge arm 122 are connected, and the third switch K3 and the lower bridge arm of the first bridge arm group 121 and the lower bridge arm of the second bridge arm 122 are disconnected.
- the third period and the fifth period are the third period, and in the third period, the third period is before the fifth period.
- Step S23 has been introduced in detail above and will not be described again here.
- a boost and discharge circuit can be formed in the fifth period, and the power battery 11 and the motor 14 with pre-stored energy jointly provide electric energy to the load device.
- step S221 is to implement the control of turning on or off the switch in step S22 in the fifth period.
- the third period and the fifth period may form a third period. In a third period, the energy of the motor 14 is first stored in the third period, and then the increased discharge voltage is provided to the load device in the fifth period.
- the embodiments provided by this application can flexibly adjust the output voltage according to the needs of the load device without changing the circuit structure.
- the circuit structure of the power battery voltage regulation system 10 itself is used to provide energy for the motor 14, which can be passed in the same circuit.
- the on and off of different switches realize the voltage boost and discharge of the power battery 11 .
- the third period and the fourth period are alternately distributed.
- the motor 14 stores energy in the third period and provides electric energy to the load device in the fourth period.
- the loops formed in the third period and the fourth period can be quickly alternately conducted multiple times within a period of time, so that the motor 14 can provide After the output voltage reaches a predetermined value, it can continue to provide power to the load device.
- the first switch K1, the second switch K2, and the fourth switch can be maintained during the alternating distribution of the third period and the fourth period.
- the conduction state of K4 and the fifth switch K5 is controlled only in the time distributed in the third period.
- the upper arm of the first bridge arm 121 and the lower bridge arm of the second bridge arm 122 are controlled to be conductive.
- the lower bridge arm of 121 and the upper bridge arm of the second bridge arm 122 are disconnected, and the lower bridge arm of the first bridge arm group 121 and the upper bridge arm of the second bridge arm 122 are controlled to be connected during the time distributed in the fourth period.
- the upper bridge arm of the first bridge arm group 121 and the lower bridge arm of the second bridge arm 122 are disconnected. In the loop formed in the third period or the fourth period, maintaining the conductive state of the first switch K1, the second switch K2, the fourth switch K4, and the fifth switch K5 will not affect the direction of the current in the loop.
- the third period and the fifth period are alternately distributed.
- the motor 14 stores energy in the third period and provides electric energy to the load device in the fifth period.
- the loops formed in the third period and the fifth period can be quickly alternately conducted multiple times within a period of time, so that the power battery 11 and the motor 14 After the output voltage provided together reaches a predetermined value, it can continue to provide power to the load device.
- the first switch K1, the second switch K2, and the fourth switch can be maintained during the alternating distribution of the third period and the fifth period.
- the conduction state of K4 and the fifth switch K5 is controlled only in the time distributed in the third period.
- the upper arm of the first bridge arm 121 and the lower bridge arm of the second bridge arm 122 are controlled to be conductive.
- the lower bridge arm of 121 and the upper bridge arm of the second bridge arm 122 are disconnected, and the upper bridge arm of the first bridge arm group 121 and the upper bridge arm of the second bridge arm 122 are controlled to be connected during the time distributed in the fifth period.
- the lower bridge arm of the first bridge arm group 121 and the lower bridge arm of the second bridge arm 122 are disconnected.
- maintaining the conductive state of the first switch K1, the second switch K2, the fourth switch K4, and the fifth switch K5 will not affect the direction of the current in the loop.
- the present application also provides a control device for the power battery voltage regulation system 10, including: a processor, and the processor is configured to execute the methods of the various embodiments of the present application.
- Figure 13 shows a schematic block diagram of the control device 1300 of the power battery voltage regulation system 10 according to the embodiment of the present application.
- the control device 1300 includes a processor 1301.
- the control device 1300 also includes a memory 1302, where the memory 1302 is used to store instructions, and the processor 1301 is used to read the instructions and execute based on the instructions.
- the processor 1301 can be the control module in any of the above embodiments.
- the present application also provides a power device.
- the power device includes the power battery voltage regulation system 10 provided in the embodiment of the present application.
- the power battery voltage regulation system 10 is used to charge the power battery 11 or use it. After the power battery 11 is discharged, the power battery 11 is used to provide electric energy for the power device.
- the power device may be a powered vehicle.
- Embodiments of the present application also provide a readable storage medium for storing a computer program, and the computer program is used to execute the foregoing methods of various embodiments of the present application.
- the disclosed systems, devices and methods can be implemented in other ways.
- the device embodiments described above are only illustrative.
- the division of the units is only a logical function division. In actual implementation, there may be other division methods.
- multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
- the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
- each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.
- the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
- the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product.
- the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application.
- the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code. .
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Abstract
Description
Claims (11)
- 一种动力电池电压调节系统(10)的控制方法,其特征在于,所述动力电池电压调节系统(10)包括动力电池(11)、开关模块(12)、充放电接口(13)和电机(14);所述开关模块(12)包括第一开关(K1)、第二开关(K2)、第三开关(K3)、第四开关(K4)、第五开关(K5)、第一桥臂组(121)和第二桥臂(122);所述第一桥臂组(121)和所述第二桥臂(122)中的每个桥臂分别包括上桥臂和下桥臂,所述第一桥臂组(121)中的每个桥臂的上桥臂和下桥臂的连接点一一对应地与所述电机(14)的中的全部电感连接,所述第二桥臂(122)中的上桥臂和下桥臂的连接点与所述电机(14)的三相中心点连接;所述第一开关(K1)的一端与所述动力电池(11)的正极连接,所述第一开关(K1)的另一端与所述第三开关(K3)的一端连接,且通过第一桥臂组(121)的上桥臂分别与所述电机(14)中的全部电感连接,所述第三开关(K3)的另一端与所述第四开关(K4)的一端连接,且通过第二桥臂(122)的上桥臂与所述电机(14)的三相中心点连接,所述第四开关(K4)的另一端与所述充放电接口(13)的正极连接;所述第二开关(K2)的一端与所述动力电池(11)的负极相连,所述第二开关(K2)的另一端与所述第五开关(K5)的一端连接,且通过第一桥臂组(121)的下桥臂分别与所述电机(14)中的全部电感连接,通过第二桥臂(122)的下桥臂与所述电机(14)的三相中心点连接,所述第五开关(K5)的另一端与所述充放电接口(13)的负极连接;所述控制方法包括:获取第一电压和第二电压,所述第一电压为所述动力电池(11)的电压,所述第二电压为充电设备的最大输出电压,所述充电设备用于连接所述充放电接口(13);当所述第一电压小于所述第二电压时,控制所述第一开关(K1)、所述第二开关(K2)、所述第三开关(K3)、所述第四开关(K4)和所述第五开关(K5)导通,第一桥臂组(121)和第二桥臂(122)中的所有桥臂断开;或者,当所述第一电压大于或等于所述第二电压时,控制所述第一开关(K1)、所述第二开关(K2)、所述第四开关(K4)、所述第五开关(K5)、所述第一桥臂组(121) 的上桥臂和所述第二桥臂(122)的上桥臂导通,所述第三开关(K3)、第一桥臂组(121)的下桥臂和第二桥臂(122)的下桥臂断开。
- 根据权利要求1所述的控制方法,其特征在于,当所述第一电压大于或等于所述第二电压时,所述控制方法还包括:在第一时段控制所述第四开关(K4)、所述第五开关(K5)、所述第一桥臂组(121)的下桥臂和所述第二桥臂(122)的上桥臂导通,所述第三开关(K3)、所述第一桥臂组(121)的上桥臂和所述第二桥臂(122)的下桥臂断开;所述控制所述第一开关(K1)、所述第二开关(K2)、所述第四开关(K4)、所述第五开关(K5)、所述第一桥臂组(121)的上桥臂和所述第二桥臂(122)的上桥臂导通,所述第三开关(K3)、第一桥臂组(121)的下桥臂和第二桥臂(122)的下桥臂断开,包括:在第二时段控制所述第一开关(K1)、所述第二开关(K2)、所述第四开关(K4)、所述第五开关(K5)、所述第一桥臂组(121)的上桥臂和所述第二桥臂(122)的上桥臂导通,所述第三开关(K3)、第一桥臂组(121)的下桥臂和第二桥臂(122)的下桥臂断开;其中,所述第一时段与所述第二时段为第一周期,在所述第一周期内,所述第一时段在所述第二时段之前。
- 根据权利要求2所述的控制方法,其特征在于,所述第一时段和所述第二时段交替分布。
- 一种动力电池电压调节系统(10)的控制方法,其特征在于,所述动力电池电压调节系统(10)包括动力电池(11)、开关模块(12)、充放电接口(13)和电机(14);所述开关模块(12)包括第一开关(K1)、第二开关(K2)、第三开关(K3)、第四开关(K4)、第五开关(K5)、第一桥臂组(121)和第二桥臂(122);所述第一桥臂组(121)和所述第二桥臂(122)中的每个桥臂分别包括上桥臂和下桥臂,所述第一桥臂组(121)中的每个桥臂的上桥臂和下桥臂的连接点一一对应地与所述电机(14)的中的全部电感连接,所述第二桥臂(122)中的上桥臂和下桥臂的连接点与所述电机(14)的三相中心点连接;所述第一开关(K1)的一端与所述动力电池(11)的正极连接,所述第一开关 (K1)的另一端与所述第三开关(K3)的一端连接,且通过第一桥臂组(121)的上桥臂分别与所述电机(14)中的全部电感连接,所述第三开关(K3)的另一端与所述第四开关(K4)的一端连接,且通过第二桥臂(122)的上桥臂与所述电机(14)的三相中心点连接,所述第四开关(K4)的另一端与所述充放电接口(13)的正极连接;所述第二开关(K2)的一端与所述动力电池(11)的负极相连,所述第二开关(K2)的另一端与所述第五开关(K5)的一端连接,且通过第一桥臂组(121)的下桥臂分别与所述电机(14)中的全部电感连接,通过第二桥臂(122)的下桥臂与所述电机(14)的三相中心点连接,所述第五开关(K5)的另一端与所述充放电接口(13)的负极连接;所述控制方法包括:获取第一电压和第三电压,所述第一电压为所述动力电池(11)的电压,所述第三电压为负载设备的请求电压,所述负载设备用于连接所述充放电接口(13);当所述第一电压大于所述第三电压时,控制所述第四开关(K4)、所述第五开关(K5)、所述第一桥臂组(121)的下桥臂和所述第二桥臂(122)的上桥臂导通,所述第三开关(K3)、所述第一桥臂组(121)的上桥臂和所述第二桥臂(122)的下桥臂断开;或者,当所述第一电压小于所述第三电压时,控制所述第一开关(K1)、所述第二开关(K2)、所述第四开关(K4)、所述第五开关(K5)、所述第一桥臂组(121)的上桥臂和所述第二桥臂(122)的上桥臂导通,所述第三开关(K3)、所述第一桥臂组(121)的下桥臂和所述第二桥臂(122)的下桥臂断开。
- 根据权利要求4所述的控制方法,其特征在于,所述控制方法还包括:在第三时段控制所述第一开关(K1)、所述第二开关(K2)、所述第一桥臂组(121)的上桥臂和所述第二桥臂(122)的下桥臂导通,所述第三开关(K3)、所述第一桥臂组(121)的下桥臂和所述第二桥臂(122)的上桥臂断开;所述当所述第一电压大于所述第三电压时,控制所述第四开关(K4)、所述第五开关(K5)、所述第一桥臂组(121)的下桥臂和所述第二桥臂(122)的上桥臂导通,所述第三开关(K3)、所述第一桥臂组(121)的上桥臂和所述第二桥臂(122)的下桥臂断开,包括:当所述第一电压大于所述第三电压时,在第四时段控制所述第四开关(K4)、所 述第五开关(K5)、所述第一桥臂组(121)的下桥臂和所述第二桥臂(122)的上桥臂导通,所述第三开关(K3)、所述第一桥臂组(121)的上桥臂和所述第二桥臂(122)的下桥臂断开;其中,所述第三时段与所述第四时段为第二周期,在所述第二周期内,所述第三时段在所述第四时段之前。
- 根据权利要求4所述的控制方法,其特征在于,所述控制方法还包括:在第三时段控制所述第一开关(K1)、所述第二开关(K2)、所述第一桥臂组(121)的上桥臂和所述第二桥臂(122)的下桥臂导通,所述第三开关(K3)、所述第一桥臂组(121)的下桥臂和所述第二桥臂(122)的上桥臂断开;所述当所述第一电压小于所述第三电压时,控制所述第一开关(K1)、所述第二开关(K2)、所述第四开关(K4)、所述第五开关(K5)、所述第一桥臂组(121)的上桥臂和所述第二桥臂(122)的上桥臂导通,所述第三开关(K3)、所述第一桥臂组(121)的下桥臂和所述第二桥臂(122)的下桥臂断开,包括:当所述第一电压小于所述第三电压时,在第五时段控制所述第一开关(K1)、所述第二开关(K2)、所述第四开关(K4)、所述第五开关(K5)、所述第一桥臂组(121)的上桥臂和所述第二桥臂(122)的上桥臂导通,所述第三开关(K3)、所述第一桥臂组(121)的下桥臂和所述第二桥臂(122)的下桥臂断开;其中,所述第三时段与所述第五时段为第三周期,在所述第三周期内,所述第三时段在所述第五时段之前。
- 根据权利要求5所述的控制方法,其特征在于,所述第三时段与所述第四时段交替分布。
- 根据权利要求6所述的控制方法,其特征在于,所述第三时段与所述第五时段交替分布。
- 一种动力电池电压调节系统(10),其特征在于,所述动力电池电压调节系统(10)包括动力电池(11)、开关模块(12)、充放电接口(13)和电机(14);所述开关模块(12)包括第一开关(K1)、第二开关(K2)、第三开关(K3)、第四开关(K4)、第五开关(K5)、第一桥臂组(121)和第二桥臂(122);所述第一桥臂组(121)和所述第二桥臂(122)中的每个桥臂分别包括上桥臂和 下桥臂,所述第一桥臂组(121)中的每个桥臂的上桥臂和下桥臂的连接点一一对应地与所述电机(14)的中的全部电感连接,所述第二桥臂(122)中的上桥臂和下桥臂的连接点与所述电机(14)的三相中心点连接;所述第一开关(K1)的一端与所述动力电池(11)的正极连接,所述第一开关(K1)的另一端与所述第三开关(K3)的一端连接,且通过第一桥臂组(121)的上桥臂分别与所述电机(14)中的全部电感连接,所述第三开关(K3)的另一端与所述第四开关(K4)的一端连接,且通过第二桥臂(122)的上桥臂与所述电机(14)的三相中心点连接,所述第四开关(K4)的另一端与所述充放电接口(13)的正极连接;所述第二开关(K2)的一端与所述动力电池(11)的负极相连,所述第二开关(K2)的另一端与所述第五开关(K5)的一端连接,且通过第一桥臂组(121)的下桥臂分别与所述电机(14)中的全部电感连接,通过第二桥臂(122)的下桥臂与所述电机(14)的三相中心点连接,所述第五开关(K5)的另一端与所述充放电接口(13)的负极连接。
- 一种动力电池电压调节系统(10)的控制装置,其特征在于,包括:处理器,所述处理器用于执行如权利要求1至3中任一项所述的控制方法,或者,执行如权利要求4至8中任一项所述的控制方法。
- 一种动力装置,其特征在于,包括如权利要求9所述的动力电池电压调节系统(10),所述动力电池电压调节系统(10)用于为所述动力电池(11)充电或用于所述动力电池(11)放电,所述动力电池(11)用于为所述动力装置提供电能。
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