WO2025232138A1 - 电池总成、充放电系统、驱动系统、方法、汽车及介质 - Google Patents
电池总成、充放电系统、驱动系统、方法、汽车及介质Info
- Publication number
- WO2025232138A1 WO2025232138A1 PCT/CN2024/132796 CN2024132796W WO2025232138A1 WO 2025232138 A1 WO2025232138 A1 WO 2025232138A1 CN 2024132796 W CN2024132796 W CN 2024132796W WO 2025232138 A1 WO2025232138 A1 WO 2025232138A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- battery
- charging
- target
- switch
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
-
- 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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
-
- 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]
-
- 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
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from 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
- 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
Definitions
- This application relates to the field of battery technology, specifically to a battery assembly, a charging and discharging system, a drive system, a method, an automobile, and a dielectric.
- Electric vehicle power supply systems can use a single battery pack to power the vehicle load and motor, and charge the battery pack through DC charging interfaces and AC charging interfaces.
- the battery pack When an electric vehicle uses a single battery pack as its power source, the battery pack may malfunction or experience other special circumstances, causing it to be unable to supply power to the vehicle load and motor, affecting vehicle use and even posing safety hazards. At the same time, the amount of electricity provided by a single battery pack is limited and cannot meet the needs of high-speed or other high-power driving conditions.
- this application provides a battery assembly, comprising:
- the first battery is connected to a charging interface or a power supply interface via a switching circuit.
- a second battery wherein the capacity of the second battery is less than that of the first battery, or the peak discharge rate of the second battery is greater than that of the first battery;
- a bidirectional voltage conversion circuit is configured to connect to a charging interface or a power supply interface.
- the second battery is connected to a bidirectional voltage conversion circuit via a switching circuit.
- the capacity of the first battery is 2-100 times that of the second battery, or the peak discharge rate of the second battery is 2-50 times that of the peak discharge rate of the first battery.
- the first battery is also connected to a bidirectional voltage conversion circuit via a switching circuit, which is used to connect to a charging interface or a power supply interface.
- the bidirectional voltage conversion circuit includes a first voltage conversion circuit and a second voltage conversion circuit, or the bidirectional voltage conversion circuit includes a second voltage conversion circuit.
- the first battery is connected to the first voltage conversion circuit via a switching circuit
- the second battery is connected to the second voltage conversion circuit via a switching circuit.
- the switching circuit includes a first switch, a second switch, and a third switch
- the first end of the first battery is connected to the first end of the first switch, and the first end of the second battery is connected to the first end of the third switch.
- the second terminal of the first battery and the second terminal of the second battery are both connected to the first terminal of the second switch.
- a first voltage conversion circuit is connected to the second terminal of a first switch and/or the second terminal of a second switch;
- the second voltage conversion circuit is connected to the second terminal of the third switch and/or the second terminal of the second switch.
- the battery assembly further includes a first capacitor
- the two ends of the first capacitor are connected to the first voltage conversion circuit and/or the second voltage conversion circuit.
- the switching circuit further includes a first precharge switching component and/or a second precharge switching component;
- a first pre-charge switch assembly is disposed between the first battery and the first capacitor
- the second precharge switch assembly is disposed between the second battery and the first capacitor.
- the switching circuit further includes a fourth switch and/or a fifth switch
- the first terminal of the fourth switch is connected to the connection node between the first voltage conversion circuit and the first battery; the second terminal of the fourth switch is used to connect to a power supply interface or an AC charging interface.
- the first end of the fifth switch is connected to the connection node between the second voltage conversion circuit and the second battery, and the second end of the fifth switch is used to connect to the power supply interface or the AC charging interface.
- the switching circuit further includes a sixth switch and/or a seventh switch
- the first terminal of the sixth switch is connected to the connection node between the first voltage conversion circuit and the first battery, and the second terminal of the sixth switch is used to connect to the DC charging interface;
- the first end of the seventh switch is connected to the connection node between the second voltage conversion circuit and the second battery, and the second end of the seventh switch is used to connect to the DC charging interface.
- this application also provides a charging and discharging system, including the battery assembly, charging interface and power supply interface provided in the first aspect;
- the charging port is used to connect to a charging power source
- the power supply interface is used to connect the load.
- the charging interface includes at least one of an AC charging interface and a DC charging interface, wherein the AC charging interface is used to connect to an AC power source and the DC charging interface is used to connect to a DC power source.
- this application also provides a charge/discharge control method applicable to the charge/discharge system provided in the second aspect, the charge/discharge control method comprising:
- the switching circuit is controlled to open and close, thereby connecting the target battery and controlling its charging and discharging.
- the target battery is the first battery and/or the second battery.
- the switching circuit is controlled to open and close, thereby connecting the target battery and controlling the target battery to charge and discharge, including:
- the switching circuit In response to the target operating condition being a discharge condition, the switching circuit is controlled to open or close, so that the discharge circuit corresponding to the target battery is turned on and supplies power to the load.
- controlling the switching circuit to open or close so that the discharge circuit corresponding to the target battery is turned on to supply power to the load includes:
- the switching circuit is then controlled to open the direct discharge circuit corresponding to the target battery, allowing the target battery's output voltage to supply power to the load.
- the battery connected to the bidirectional voltage conversion circuit is identified as the target battery.
- the switching circuit is controlled to turn on and off so that the boost discharge circuit corresponding to the target battery is turned on, and the output voltage of the target battery is boosted and converted to supply power to the load.
- the switching circuit is controlled to open and close, thereby connecting the target battery and controlling the target battery to charge and discharge, including:
- the switching circuit In response to the target operating condition being DC charging, the switching circuit is controlled to open or close, so that the DC charging circuit corresponding to the target battery is turned on, allowing the DC power supply to charge the target battery;
- the switching circuit In response to the target operating condition being AC charging, the switching circuit is controlled to open or close, so that the AC charging circuit corresponding to the target battery is turned on, so that the AC power supply can charge the target battery.
- controlling the on/off state of the switching circuit to enable the DC charging circuit corresponding to the target battery to conduct, so that the DC power supply charges the target battery including:
- the supply voltage range of the DC power supply and the required charging voltage of the target battery are obtained;
- the switching circuit In response to the demand charging voltage being within the supply voltage range, the switching circuit is controlled to open or close, so that the direct DC charging circuit corresponding to the target battery is turned on.
- the switching circuit In response to a charging voltage demand exceeding the supply voltage range, the switching circuit is controlled to open or close, thereby activating the boost DC charging circuit corresponding to the target battery;
- the switching circuit In response to a demand for charging power that is less than the supply voltage range, the switching circuit is turned on or off to activate the buck DC charging circuit corresponding to the target battery.
- this application also provides a self-heating method applicable to the charge/discharge system provided in the second aspect, the self-heating method comprising:
- the battery to be heated is determined, and the switching circuit is controlled to activate the self-heating circuit corresponding to the battery to be heated, so as to self-heat the battery.
- determining the battery to be heated based on the current battery data corresponding to the two batteries includes:
- the two batteries are identified as batteries to be heated.
- current battery data includes the current battery temperature
- Low-temperature operating conditions are defined as the current battery temperature being lower than its corresponding low-temperature threshold.
- current battery data includes current battery temperature and current output power
- Low-temperature operating conditions are defined as follows: the current battery temperature is lower than its corresponding low-temperature threshold, and the current output power of the battery is lower than its corresponding low-temperature power threshold.
- this application also provides a drive system, including the battery assembly, power supply interface and drive module provided in the first aspect;
- the drive module is connected to the power supply interface and is used to connect the motor.
- this application also provides a drive control method applicable to the drive system provided in the fifth aspect, the drive control method comprising:
- the switching circuit is controlled to connect to the target battery, thereby controlling the drive module to drive the motor.
- the target battery is the first battery and/or the second battery.
- the switching circuit is controlled to connect to the target battery, and the drive module is controlled to drive the motor, including:
- the battery with the smaller capacity between the first and second batteries is identified as the target battery.
- the switching circuit is controlled to open and close, so as to connect the target battery and control the drive module to drive the motor.
- the battery corresponding to the larger current output power is identified as the target battery.
- the switching circuit is then controlled to connect the target battery, and the drive module is controlled to drive the motor.
- the first and second batteries are identified as target batteries.
- the switching circuit is controlled to open and close, thereby connecting the target batteries and controlling the drive module to drive the motor.
- this application also provides a controller, including a memory, a processor, and a computer program stored in the memory and executable on the processor.
- the processor executes the computer program, it implements the above-described charging and discharging control method, implements the self-heating method provided in the fourth aspect, or implements the drive control method provided in the sixth aspect.
- this application also provides an automobile, including the battery assembly provided in the first aspect, the charging and discharging system provided in the second aspect, or the drive system and motor provided in the fifth aspect.
- this application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the charging and discharging control method provided in the third aspect, the self-heating method provided in the fourth aspect, or the drive control method provided in the sixth aspect.
- the battery assembly, charging and discharging system, drive system, method, automobile, and medium provided in this application can connect at least one of the first and second batteries, which are arranged in parallel, to a charging interface or a power supply interface via a switching circuit.
- This allows the charging power supply to charge at least one battery through the charging interface; or at least one battery can supply power to a load or a motor connected to the drive module through the power supply interface to meet different needs.
- the first and second batteries generally have different capacities, which can meet the requirements of small size and low cost, and can also supplement power when the required power is insufficient.
- FIG. 1 is a schematic block diagram of the battery assembly provided in this application.
- FIG. 2 is a circuit diagram of the battery assembly provided in this application.
- FIG. 3 is another circuit diagram of the battery assembly provided in this application.
- FIG. 4 is a schematic block diagram of the charging and discharging system provided in this application.
- FIG. 5 is a schematic block diagram of the drive system provided in this application.
- Battery assembly 100. Charging and discharging system; 200. Drive system; 1. First battery; 2. Second battery; 3. Bidirectional voltage conversion circuit; 31. First voltage conversion circuit; 32. Second voltage conversion circuit; 4. Load; 5. AC power supply; 6. DC power supply; 7. Drive module; 8. Motor.
- first element, component, area, layer, or portion discussed below may be referred to as a second element, component, area, layer, or portion.
- Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below,” “under,” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.
- the battery assembly 10 includes a first battery 1, a second battery 2, a switching circuit K0, and a bidirectional voltage conversion circuit 3.
- the capacity of the first battery 1 is greater than that of the second battery 2, or the peak discharge rate of the first battery 1 is less than that of the second battery 2.
- the first battery 1 is connected to a charging interface OUT1 or a power supply interface OUT2 via the switching circuit K0.
- the second battery 2 is connected to the bidirectional voltage conversion circuit 3 via the switching circuit K0.
- the bidirectional voltage conversion circuit 3 is configured to be connected to either the charging interface OUT1 or the power supply interface OUT2.
- the first battery 1 and the second battery 2 are two batteries of the battery assembly 10, and the first ends of the two batteries are the positive and negative terminals of each other.
- the capacity of the first battery 1 is greater than that of the second battery 2, or the peak discharge rate of the first battery 1 is less than that of the second battery 2, that is, the first battery 1 is a battery with a large capacity or a small peak discharge rate.
- the first battery 1 is an EV battery, which can meet the normal driving conditions of the whole vehicle in pure electric EV mode.
- the second battery 2 is a battery with a small capacity or a high peak discharge rate.
- the second battery 2 is an HEV battery, which can meet the peak power requirements of the whole vehicle under extreme conditions such as starting, rapid acceleration and overtaking.
- the overall volume will be large, the installation space will be insufficient, and the cost will be high.
- the cost will be high.
- one of the two batteries will have a large capacity and a small peak discharge rate, while the other battery will have a small capacity and a large peak discharge rate. This satisfies the requirements of small size and low cost, and can also supplement power when the required power is insufficient.
- the charging interface OUT1 is configured to connect to a charging power source.
- OUT1 includes a positive charging interface and a negative charging interface, and must be connected to both ends of at least one battery.
- the power supply interface OUT2 is configured to connect to an electrical device.
- OUT2 includes a positive power supply interface and a negative power supply interface, and must be connected to both ends of at least one battery.
- the first battery 1 and the second battery 2 are connected in parallel. That is, the two ends of the first battery 1 are connected to the charging interface OUT1 or the power supply interface OUT2; and the two ends of the second battery 2 are also connected to the charging interface OUT1 or the power supply interface OUT2.
- the first battery 1 and/or the second battery 2 can be connected to the charging interface OUT1 to receive charging from the charging power source; or, to supply power to the electrical device corresponding to the power supply interface OUT2.
- the bidirectional voltage conversion circuit 3 is a circuit that can realize both boost conversion and buck conversion control.
- the bidirectional voltage conversion circuit 3 includes at least one voltage conversion unit, each voltage conversion unit including a first bridge arm and a first inductor L1.
- the first bridge arm includes a first power transistor T1 and a second power transistor T2 connected in series, the connection node between the first power transistor T1 and the second power transistor T2 is the midpoint of the first bridge arm, and of the first power transistor T1 and the second power transistor T2, the power transistor configured to connect to the positive terminal of the battery, the positive charging interface and the positive power supply interface is the upper bridge power transistor, and the power transistor configured to connect to the negative terminal of the battery, the negative charging interface and the negative power supply interface is the lower bridge power transistor.
- the bidirectional voltage conversion circuit 3 includes at least one first bridge arm, and the first end and the second end of the at least one first bridge arm are the two ends of a first power transistor T1 and a second power transistor T2 connected in series.
- the bidirectional voltage conversion circuit 3 also includes at least one first inductor L1. The first end of each first inductor L1 is connected to the midpoint of a first bridge arm.
- the second ends of at least one first inductor L1 converge to form the third terminal of the bidirectional voltage conversion circuit 3.
- the third terminal of the bidirectional voltage conversion circuit 3 has the opposite polarity to the second terminal, allowing it to be connected to both ends of at least one battery. This enables control of at least one battery's connection to either the charging interface OUT1 or the power supply interface OUT2, and also achieves voltage conversion.
- the battery assembly 10 also includes a second capacitor C2.
- the two ends of the second capacitor C2 are connected to the third end and the second end of the bidirectional voltage conversion circuit 3, respectively.
- energy storage and filtering effects can be achieved, and the number of components in the battery assembly 10 can be effectively reduced, which helps to save circuit costs.
- the battery assembly 10 also includes a switching circuit K0.
- Switching circuit K0 can connect the two ends of the first battery 1 to either the charging interface OUT1 or the power supply interface OUT2 to independently control the first battery 1 to connect to a charging power source and receive charging, or independently control the first battery 1 to connect to the power supply interface OUT2 to supply power to electrical devices, such as the load 4 or the drive module 7.
- the two ends of the second battery 2 can be connected to either the charging interface OUT1 or the power supply interface OUT2 to independently control the second battery 2 to connect to a charging power source and receive charging, or independently control the first battery 1 to connect to the power supply interface OUT2 to supply power to electrical devices, such as the load 4 or the drive module 7.
- the first battery 1 and the second battery 2 can also be connected to the circuit at the same time. Since the first battery 1 and the second battery 2 are connected in parallel, when they are connected to the charging interface OUT1 or the power supply interface OUT2, it is necessary to ensure that the input voltage or output voltage of the two batteries is consistent. Therefore, a bidirectional voltage conversion circuit 3 is also required.
- the bidirectional voltage conversion circuit 3 is connected to the second battery 2 to convert the input voltage or output voltage of the second battery 2 so that the input voltage or output voltage of the two batteries is consistent, so that the two batteries can realize the charging or power supply function at the same time.
- At least one of the first battery 1 and the second battery 2 connected in parallel can be connected to the charging interface OUT1 or the power supply interface OUT2 through the switching circuit K0, so that the charging power can charge at least one battery through the charging interface OUT1; or at least one battery can supply power to the load 4 or the motor 8 connected to the drive module 7 through the power supply interface OUT2 to meet different needs.
- the two batteries generally have different capacities, which can meet the requirements of small size and low cost, and can also supplement power when the required power is insufficient.
- the second battery 2 can be controlled to drive the motor 8 independently; in response to the vehicle being in normal driving conditions, the first battery 1 can be controlled to drive the motor 8 independently; in response to the vehicle being in extreme conditions with high power demand, such as high-speed overtaking, 0-100 km/h acceleration, extreme escaping, and high-speed hill climbing, the bidirectional voltage conversion circuit 3 can be used to boost the output voltage of the second battery 2 so that the boosted battery voltage is consistent with the output voltage of the first battery 1, and the second battery 2 can supplement the power of the first battery 1 to meet the specific needs of high power demand.
- the bidirectional voltage conversion circuit 3 can be used to boost the output voltage of the second battery 2 so that the boosted battery voltage is consistent with the output voltage of the first battery 1, and the second battery 2 can supplement the power of the first battery 1 to meet the specific needs of high power demand.
- the charge of the first battery 1 is 2-100 times the charge of the second battery 2, or the peak discharge rate of the second battery 2 is 2-50 times the peak discharge rate of the first battery 1.
- the capacity of the first battery 1 is 2-100 times that of the second battery 2, and the peak discharge rate of the first battery 1 is less than that of the second battery 2, so as to ensure that the first battery 1 can effectively meet the normal driving needs of the whole vehicle in pure electric EV mode.
- the capacity of the first battery 1 is greater than that of the second battery 2, and the peak discharge rate of the second battery 2 is 2-50 times that of the first battery 1, which can ensure that the second battery 2 can effectively meet the peak power requirements of the vehicle under extreme conditions such as starting, rapid acceleration and overtaking.
- the capacity of the first battery 1 is 2-100 times that of the second battery 2, and the peak discharge rate of the second battery 2 is 2-50 times that of the first battery 1.
- the first battery 1 to meet the normal driving requirements of the vehicle in pure electric EV mode, while the second battery 2 can effectively meet the peak power requirements of the vehicle in extreme conditions such as starting, rapid acceleration, and overtaking.
- the voltage is adjusted by the bidirectional voltage conversion circuit 3, and the second battery 2 supplements the insufficient power of the first battery 1, so that it can meet different operating conditions.
- the first battery 1 is also connected to a bidirectional voltage conversion circuit 3 via a switching circuit K0.
- the bidirectional voltage conversion circuit 3 is configured to connect to either a charging interface OUT1 or a power supply interface OUT2.
- the first battery 1 is also connected to a bidirectional voltage conversion circuit 3 via a switching circuit K0.
- This bidirectional voltage conversion circuit 3 is configured to connect to either the charging interface OUT1 or the power supply interface OUT2.
- the bidirectional voltage conversion circuit 3 can be used to convert the input voltage or output voltage of the first battery 1 to match its input voltage with the battery's requirements, or to match its output voltage with the requirements of the electrical device.
- the first and second terminals of the bidirectional voltage conversion circuit 3 are configured to connect to either the charging interface OUT1 or the power supply interface OUT2, while the third and second terminals of the bidirectional voltage conversion circuit 3 are respectively connected to the two ends of the second battery 2 to control the connection of the second battery 2 to either the charging interface OUT1 or the power supply interface OUT2, and to achieve voltage conversion.
- the bidirectional voltage conversion circuit 3 includes a first voltage conversion circuit 31 and a second voltage conversion circuit 32, or the bidirectional voltage conversion circuit 3 includes a second voltage conversion circuit 32; the first battery 1 is connected to the first voltage conversion circuit 31 through a switch circuit K0; the second battery 2 is connected to the second voltage conversion circuit 32 through a switch circuit K0.
- the bidirectional voltage conversion circuit 3 may include a first voltage conversion circuit 31 and a second voltage conversion circuit 32, or it may only include the second voltage conversion circuit 32.
- a first battery 1 is connected to the first voltage conversion circuit 31 via a switching circuit K0.
- the first voltage conversion circuit 31 is configured to convert the input voltage or output voltage of the first battery 1.
- a second battery 2 is connected to the second voltage conversion circuit 32 via the switching circuit K0.
- the second voltage conversion circuit 32 is configured to convert the input voltage or output voltage of the second battery 2.
- the bidirectional voltage conversion circuit 3 may include only the second voltage conversion circuit 32.
- the first and second terminals of the second voltage conversion circuit 32 are configured to connect to the charging interface OUT1 or the power supply interface OUT2.
- the third and second terminals of the second voltage conversion circuit 32 are configured to connect to the two ends of the second battery 2 through the switching circuit K0.
- the second voltage conversion circuit 32 is used to convert the input voltage or output voltage of the second battery 2 to meet the voltage requirements corresponding to different operating conditions.
- the second voltage conversion circuit 32 can be controlled to convert the output voltage of the second battery 2 to meet the voltage requirements corresponding to different operating conditions.
- the bidirectional voltage conversion circuit 3 may further include a first voltage conversion circuit 31 and a second voltage conversion circuit 32.
- the first and second terminals of the first voltage conversion circuit 31 and the second voltage conversion circuit 32 are configured to connect to the charging interface OUT1 or the power supply interface OUT2.
- the third and second terminals of the first voltage conversion circuit 31 are configured to be connected to the two ends of the first battery 1 through the switching circuit K0.
- the third and second terminals of the second voltage conversion circuit 32 are connected to the two ends of the second battery 2 through the switching circuit K0.
- At least one of the first voltage conversion circuit 31 and the second voltage conversion circuit 32 is controlled to adjust the input voltage or output voltage of the two batteries, thereby ensuring the normal operation of the two batteries.
- the first battery 1 and the second battery 2 are connected in parallel to the charging interface OUT1 or the power supply interface OUT2. It is necessary to control the operation of at least one of the first voltage conversion circuit 31 and the second voltage conversion circuit 32 so that the output voltage of the first battery 1 and the second battery 2 are consistent, so as to ensure the feasibility of the two batteries being connected in parallel to supply power to the load 4 or the drive module 7.
- the first battery 1 is connected to the first voltage conversion circuit 31 via the switching circuit K0
- the second battery 2 is connected to the second voltage conversion circuit 32 via the switching circuit K0.
- the first voltage conversion circuit 31 is used to convert the input voltage or output voltage of the first battery 1
- the second voltage conversion circuit 32 is used to convert the input voltage or output voltage of the second battery 2, so as to ensure that when the first battery 1 and/or the second battery 2 are connected to the charging interface OUT1, their input voltage matches the battery requirements, or when the first battery 1 and/or the second battery 2 are connected to the power supply interface OUT2, their output voltage matches the requirements of the electrical equipment.
- the switching circuit K0 includes a first switch K1, a second switch K2, and a third switch K3; the first terminal of the first battery 1 is connected to the first terminal of the first switch K1, and the first terminal of the second battery 2 is connected to the first terminal of the third switch K3; the second terminals of the first battery 1 and the second terminals of the second battery 2 are both connected to the first terminal of the second switch K2; a first voltage conversion circuit 31 is connected to the second terminal of the first switch K1 and/or the second terminal of the second switch K2; and a second voltage conversion circuit 32 is connected to the second terminal of the third switch K3 and/or the second terminal of the second switch K2.
- the switching circuit K0 includes a first switch K1, a second switch K2, and a third switch K3.
- the first and second terminals of the battery are the positive and negative terminals of the battery, respectively.
- the positive terminal of the first battery 1 is connected to the first switch K1
- the positive terminal of the second battery 2 is connected to the third switch K3
- the negative terminals of both the first battery 1 and the second battery 2 are connected to the second switch K2.
- the first voltage conversion circuit 31 in response to the first battery 1 being connected to the first switch K1 and the second switch K2 respectively, the first voltage conversion circuit 31 can be connected to the first switch K1 and/or the second switch K2.
- the first battery 1 can be connected to the first voltage conversion circuit 31 by opening or closing one or two switches, so that the first voltage conversion circuit 31 can convert the input voltage or output voltage of the first battery 1.
- the second voltage conversion circuit 32 can be connected to the third switch K3 and/or the second switch K2.
- the second battery 2 can be connected to the second voltage conversion circuit 32, so that the second voltage conversion circuit 32 can convert the input voltage or output voltage of the second battery 2.
- the battery assembly 10 further includes a first capacitor C1; the two ends of the first capacitor C1 are connected to a first voltage conversion circuit 31 and/or a second voltage conversion circuit 32.
- the battery assembly 10 further includes a first capacitor C1, which may be a capacitor connected in parallel with the charging interface OUT1 or the power supply interface OUT2.
- the two ends of the first capacitor C1 are connected to the first end and the second end of the first voltage conversion circuit 31, and/or the first end and the second end of the second voltage conversion circuit 32.
- the first voltage conversion circuit 31 can be connected to the first battery 1 not only through the switching circuit K0 (such as the first switch K1 and/or the second switch K2), but also to the first capacitor C1. In response to the switching circuit K0 being turned on, the first battery 1, the first voltage conversion circuit 31 and the first capacitor C1 can cooperate to form the first self-heating circuit corresponding to the first battery 1.
- the first self-heating circuit refers to a circuit in which a single battery heats itself.
- the second self-heating circuit is a circuit in which two batteries heat each other.
- the first self-heating circuit corresponding to the first battery 1 refers to the circuit in which the first battery 1 uses the first voltage conversion circuit 31 and the first capacitor C1 to complete the self-heating process of the first battery 1.
- the working process of the first self-heating circuit corresponding to the EV battery is as follows: (1) Control the first switch K1 and the second switch K2 in the EV battery to be turned on, the lower bridge power transistor T2 to be turned on, and the upper bridge power transistor T1 to be turned off, so that the EV battery charges the first inductor L1 and charges the first capacitor C1 through the diode connected in parallel with the upper bridge power transistor T1; (2) Control the lower bridge power transistor T2 in the EV battery to be turned off and the upper bridge power transistor T1 to be turned on, so that the EV battery can be charged using the first capacitor C1 and the first inductor L1, so that the EV battery can complete the self-heating operation.
- the second voltage conversion circuit 32 can be connected to the second battery 2 through the switch circuit K0 (such as the third switch K3 and/or the second switch K2), and also to the first capacitor C1.
- the switch circuit K0 being turned on, the second battery 2, the second voltage conversion circuit 32 and the first capacitor C1 cooperate to form a self-heating circuit corresponding to the second battery 2. Its working process is the same as above, and will not be described in detail here.
- the first voltage conversion circuit 31 connects the first battery 1 and the first capacitor C1 through the first switch K1 and/or the second switch K2; the second voltage conversion circuit 32 connects the second battery 2 and the first capacitor C1 through the third switch K3 and/or the second switch K2; in response to both switches being turned on, the first battery 1, the first voltage conversion circuit 31, the second battery 2, the second voltage conversion circuit 32 and the first capacitor C1 cooperate to form a second self-heating circuit corresponding to the two batteries.
- the first battery 1, the first voltage conversion circuit 31, the second battery 2, the second voltage conversion circuit 32, and the first capacitor C1 cooperate to form a second self-heating circuit.
- the first battery 1 and the second battery 2 are self-heated.
- the first battery 1 is an EV battery
- the second battery 2 is an HEV battery.
- the charging process of the EV battery to the HEV battery is as follows:
- control the third switch K3 and the second switch K2 in the HEV battery to turn on control the upper bridge power transistor T1 in the HEV battery to turn on, and use the fully charged first capacitor C1 to charge the first inductor L1 in the HEV battery and the HEV battery; then, control the upper bridge power transistor T1 in the HEV battery to turn off, and control the lower bridge power transistor T2 to turn on, and use the first inductor L1 after energy storage to continuously discharge and charge the HEV battery.
- the charging process of the EV battery to the HEV battery is completed.
- the HEV battery can also be controlled to charge the EV battery, and the switching sequence is reversed. Repeating this process can complete the mutual charging and discharging process of the two batteries to achieve the mutual heating process of the two batteries.
- the battery assembly 10 also includes a passive discharge resistor R3 connected in parallel with the first capacitor C1. After the vehicle is powered off, the control switch circuit K0 needs to be disconnected, and the first capacitor C1 needs to be discharged. Therefore, the discharge process needs to be completed by the passive discharge resistor R3 in conjunction with the first capacitor C1.
- the switching circuit K0 further includes a first precharge switching component KR1 and/or a second precharge switching component KR2; the first precharge switching component KR1 is disposed between the first battery 1 and the first capacitor C1; the second precharge switching component KR2 is disposed between the second battery 2 and the first capacitor C1.
- the switching circuit K0 also includes a first pre-charge switch component KR1 and/or a second pre-charge switch component KR2. It can have only one pre-charge switch component or two pre-charge switch components.
- the first pre-charge switch component KR1 is located between the first battery 1 and the first capacitor C1, and specifically includes a first pre-charge resistor R01 and a first pre-charge switch K01 connected in series. It is configured to be turned on during the pre-charge of the first battery 1 to avoid damage to the battery from the large current generated during charging.
- the second precharge switch assembly KR2 is disposed between the second battery 2 and the first capacitor C1, specifically including a second precharge resistor R02 and a second precharge switch K02 connected in series, which is configured to be turned on when the second battery 2 is precharged, so as to avoid the large current generated during charging from damaging the battery.
- the first pre-charge switch component KR1 can be connected in parallel with any switch disposed between the first battery 1 and the first capacitor C1. For example, it can be connected in parallel with the first switch K1. When the first battery 1 needs to be charged, the first pre-charge switch component KR1 is first turned on to pre-charge the first capacitor C1.
- the battery assembly 10 also includes a passive discharge resistor R1 connected in parallel with the first capacitor C1.
- the switch circuit K0 needs to be turned off.
- the first capacitor C1 needs to be discharged. Therefore, the discharge process needs to be completed by the passive discharge resistor R1 in conjunction with the first capacitor C1.
- the switching circuit K0 also includes a fourth switch K4 and/or a fifth switch K5; the first end of the fourth switch K4 is connected to the connection node between the first voltage conversion circuit 31 and the first battery 1, and the second end of the fourth switch K4 is configured to connect to the power supply interface OUT2 or the AC charging interface; the first end of the fifth switch K5 is connected to the connection node between the second voltage conversion circuit 32 and the second battery 2, and the second end of the fifth switch K5 is configured to connect to the power supply interface OUT2 or the AC charging interface.
- the switching circuit K0 further includes a fourth switch K4, the first end of which is connected to the connection node between the first voltage conversion circuit 31 and the first battery 1, and the second end of the fourth switch K4 is configured to connect to the power supply interface OUT2.
- the first terminal of the fourth switch K4 is connected to the connection node between the first voltage conversion circuit 31 and the first battery 1. Specifically, it can be directly connected to the first battery 1, or it can be connected to the first battery 1 through a switch (such as the first switch K1) placed between the two.
- a direct discharge circuit can be formed between the first battery 1 and the electrical device corresponding to the power supply interface OUT2.
- a boost discharge circuit can be formed between the first battery 1 and the electrical device corresponding to the power supply interface OUT2 through the first voltage conversion circuit 31. After the first voltage conversion circuit 31 converts the output voltage of the first battery 1, it supplies power to the electrical load 4.
- the direct discharge circuit refers to a circuit where the battery can directly supply power to the electrical load 4 without voltage conversion.
- the boost discharge circuit refers to a circuit where voltage conversion is required during the battery's power supply to the electrical load 4.
- the direct discharge circuit corresponding to the first battery 1 can be turned on, and the output voltage of the first battery 1 can be used to directly supply power to the load 4 to ensure the normal operation of the load 4.
- the boost discharge circuit corresponding to the first battery 1 can be turned on.
- the first switch K1 is turned on, and the first voltage conversion circuit 31 is controlled to boost the output voltage of the first battery 1 so that the boosted voltage matches the required supply voltage of the load 4, so as to use the boosted voltage to supply power to the load 4 and ensure the normal operation of the load 4.
- the switching circuit K0 further includes a fifth switch K5, the first end of which is connected to the connection node between the second voltage conversion circuit 32 and the second battery 2, and the second end of the fifth switch K5 is configured to connect to the power supply interface OUT2.
- the first terminal of the fifth switch K5 is connected to the connection node between the second voltage conversion circuit 32 and the second battery 2. Specifically, it can be directly connected to the second battery 2, or it can be connected to the second battery 2 through a switch (such as the third switch K3) located between the two.
- a direct discharge circuit can be formed between the second battery 2 and the electrical device corresponding to the power supply interface OUT2.
- a boost discharge circuit can be formed between the second battery 2 and the electrical device corresponding to the power supply interface OUT2 through the second voltage conversion circuit 32. After the output voltage of the second battery 2 is converted by the second voltage conversion circuit 32, power is supplied to the electrical load 4.
- the second battery 2 when the output voltage of the second battery 2 is greater than the required power supply voltage of the load 4, it can be determined that the second battery 2 can provide the load 4 with the required power supply voltage to meet its normal operation. At this time, the direct discharge circuit corresponding to the second battery 2 can be turned on, and the output voltage of the second battery 2 can be used to directly supply power to the load 4 to ensure the normal operation of the load 4.
- the boost discharge circuit corresponding to the second battery 2 can be turned on, specifically the third switch K3 is turned on, and the second voltage conversion circuit 32 is controlled to boost the output voltage of the second battery 2 so that the boosted voltage matches the required supply voltage of the load 4, so as to use the boosted voltage to supply power to the load 4 and ensure the normal operation of the load 4.
- the specific control logic is as follows:
- the target battery here can be at least one battery connected between the two buses.
- the direct discharge circuit corresponding to the target battery can be turned on so as to use the output voltage of the target battery to supply power to the load 4.
- the boost discharge circuit corresponding to the target battery can be turned on to boost the output voltage of the target battery and use the boosted voltage to supply power to the load 4, so as to ensure that the target battery provides the required power supply voltage to meet its normal operation, thereby ensuring the normal operation of the load 4.
- the first voltage conversion circuit 31 and/or the second voltage conversion circuit 32 can be controlled to boost the corresponding output voltage so that the boosted voltage matches the required supply voltage of load 4, so as to use the boosted voltage to supply power to load 4 and ensure the normal operation of load 4.
- the first battery 1 can be connected to the AC charging interface OUT1 via the fourth switch K4 to form a direct AC charging circuit corresponding to the first battery 1, which is configured to control the AC power supply 5 connected to the AC charging interface OUT1 to charge the first battery 1.
- the direct AC charging circuit corresponding to the first battery 1 can be controlled to be turned on so as to use the AC power supply 5 on the car to charge the first battery 1.
- the second battery 2 can be connected to the AC charging interface OUT1 via the fifth switch K5, forming a direct AC charging circuit corresponding to the second battery 2.
- This circuit is activated when the target operating condition is AC charging, controlling the AC power supply 5 connected to the AC charging interface OUT1 to charge the second battery 2.
- the direct AC charging circuit corresponding to the second battery 2 can be activated to utilize the vehicle's AC power supply 5 to charge the second battery 2.
- the switching circuit K0 further includes a sixth switch K6 and/or a seventh switch K7; the first end of the sixth switch K6 is connected to the connection node between the first voltage conversion circuit 31 and the first battery 1, and the second end of the sixth switch K6 is configured to connect to the DC charging interface OUT1; the first end of the seventh switch K7 is connected to the connection node between the second voltage conversion circuit 32 and the second battery 2, and the second end of the seventh switch K7 is configured to connect to the DC charging interface OUT1.
- the battery assembly 10 further includes a sixth switch K6.
- the first end of the sixth switch K6 is connected to the connection node between the first voltage conversion circuit 31 and the first battery 1, and the second end of the sixth switch K6 is configured to connect to the DC charging interface OUT1.
- the first end of the sixth switch K6 is connected to the connection node between the first voltage conversion circuit 31 and the first battery 1. It can be set between the first battery 1 and the first switch K1, or between the first switch K1 and the first voltage conversion circuit 31.
- the switching circuit K0 first switch K1/or second switch K2 between the first battery 1 and the first voltage conversion circuit 31 is turned on, and the sixth switch K6 is turned off, the first battery 1 is connected to the DC charging interface through the first voltage conversion circuit 31, forming a step-down DC charging circuit corresponding to the first battery 1.
- This circuit is configured to step down the supply voltage of the DC charging interface and use the step-down converted voltage to charge the first battery 1, ensuring that the input voltage of the DC power supply 6 to the first battery 1 matches its required charging voltage and avoiding overcharging.
- a boost DC charging circuit corresponding to the first battery 1 is formed between the DC charging interface, the sixth switch K6, the first voltage conversion circuit 31, and the first battery 1.
- This circuit is configured to boost the supply voltage of the DC charging interface OUT1 and use the boost converted voltage to charge the first battery 1, thereby increasing the charging rate of the first battery 1.
- the battery assembly 10 further includes a seventh switch K7.
- the first end of the seventh switch K7 is connected to the connection node between the second voltage conversion circuit 32 and the second battery 2, and the second end of the seventh switch K7 is configured to connect to the charging interface OUT1.
- the first terminal of the seventh switch K7 is connected to the connection node between the second voltage conversion circuit 32 and the second battery 2. That is, it can be set between the second battery 2 and the third switch K3, or between the third switch K3 and the second voltage conversion circuit 32.
- the switching circuit K0 the third switch K3 and/or the second switch K2 between the second battery 2 and the second voltage conversion circuit 32
- the seventh switch K7 is turned off
- the second battery 2 is connected to the DC charging interface through the second voltage conversion circuit 32, forming a step-down DC charging circuit corresponding to the second battery 2. It is configured to step down the supply voltage of the DC charging interface OUT1 and use the step-down converted voltage to charge the second battery 2, so as to ensure that the input voltage of the DC power supply 6 to the second battery 2 matches its required charging voltage and avoid overcharging.
- the switching circuit K0 third switch K3 and/or second switch K2 between the second battery 2 and the second voltage conversion circuit 32
- the seventh switch K7 is turned on
- the second battery 2 is also connected to the DC charging interface through the second voltage conversion circuit 32 via the seventh switch K7K8, forming a boost DC charging circuit corresponding to the second battery 2.
- the boost DC charging circuit corresponding to the second battery 2 is turned on, the second voltage conversion circuit 32 is controlled to boost the supply voltage of the DC charging interface, and the boosted voltage is used to charge the second battery 2.
- both the first battery 1 and the second battery 2 form a buck DC charging circuit by cooperating with their respective switching components and voltage conversion circuits. They also form a boost DC charging circuit by cooperating with their respective voltage conversion circuits through the sixth switch K6 and the seventh switch K7.
- the two buck DC charging circuits can be controlled to perform buck conversion.
- the supply voltage is between the required charging voltage of the two batteries, one circuit can be controlled to perform boost conversion and the other to perform buck conversion.
- the two boost DC charging circuits can be controlled to perform boost conversion to ensure the charging rate.
- the first battery 1 which requires a larger charging voltage
- the second battery 2 which requires a smaller charging voltage
- the third switch K3 and/or the second switch K2 connected to its two ends, as well as the second voltage conversion circuit 32.
- the EV battery can be identified as the first battery and the HEV battery as the second battery.
- the direct DC charging circuit of the first battery can be turned on when the supply voltage of the DC charging interface matches the required charging voltage of the first battery 1, that is, when the supply voltage is less than or equal to the required charging voltage of the first battery, so that the DC power supply 6 can directly charge the first battery.
- the second battery 2 which has a smaller charging voltage requirement, is connected to the DC charging interface through the second voltage conversion circuit 32 to form a step-down DC charging circuit corresponding to the second battery 2.
- the step-down DC charging circuit of the second battery 2 can be controlled to be turned on so that the voltage conversion circuit can perform step-down conversion on the supply voltage output by the DC charging interface.
- the DC power supply 6 performs a step-down charging process on the first battery 1 (EV battery) as follows:
- the upper bridge power transistor T1 is turned off, while the lower bridge power transistor T2 is turned on. Since the inductor current cannot change abruptly, the current of the first inductor L1 is maintained, and electrical energy is output. The current flows sequentially through the first inductor L1, the first switch K1, the EV battery, the second switch K2, and the lower bridge power transistor T2, so as to use the first inductor L1 to charge the first battery 1 (EV battery).
- the switching frequency of the upper bridge power transistor T1 and the lower bridge power transistor T2 is adjusted to adjust the input voltage across the battery, thereby achieving a step-down charging effect.
- the two ends of the first battery 1 are connected to the third and second ends of the first voltage conversion circuit 31, respectively.
- the boost DC charging circuit is boosting the voltage
- the current output from the DC charging interface passes sequentially through the first inductor L1 and the lower bridge power transistor T2 of the first voltage conversion circuit 31.
- the DC power supply 6 charges the first inductor L1, and then the current passes sequentially through the first inductor L1 and the fourth switch K4 to the two ends of the first battery 1 to boost the supply voltage of the DC charging interface and use the boosted voltage to DC charge the battery.
- this application also provides a charging and discharging system 100, including a battery assembly 10, a charging interface OUT1 and a power supply interface OUT2; the charging interface OUT1 is configured to connect to a charging power source; the power supply interface OUT2 is configured to connect to a load 4.
- charging interface OUT1 is configured to connect to a charging power source.
- Load 4 is configured to connect to loads that require power, which are other loads 4 on the vehicle besides the motor 8 connected through drive module 7, including the vehicle's instrument panel and air conditioning compressor, etc.
- Drive module 7 is a module configured to drive motor 8 to operate.
- the charging and discharging system 100 includes a battery assembly 10. At least one of the first battery 1 and the second battery 2 can be connected to the circuit via the switching circuit K0, so that it can be connected to the charging power supply through the charging interface OUT1 to charge at least one battery and supply power to the load 4.
- a bidirectional voltage conversion circuit 3 is also provided between the two buses, which can perform both boost conversion and buck conversion to convert the input voltage and output voltage of the batteries connected to the two buses so as to meet the power supply or charging requirements.
- the charging interface OUT1 includes at least one of an AC charging interface and a DC charging interface, wherein the AC charging interface is configured to connect to an AC power source 5 and the DC charging interface is configured to connect to a DC power source 6.
- the AC charging interface is configured to connect to the AC power source 5.
- the DC charging interface is configured to connect to the DC power source 6 (including but not limited to DC charging piles).
- the load 4 is configured to connect to any load 4 that requires power, which is any load 4 on the vehicle other than the motor 8 that needs to be connected via the drive module 7.
- this application also provides a charging and discharging control method applicable to a charging and discharging system 100.
- the charging and discharging control method includes: controlling the on/off state of a switching circuit K0 based on a target operating condition to achieve connection of a target battery and control the target battery to charge and discharge; and the target battery is a first battery 1 and/or a second battery 2.
- the controller can receive first vehicle data and determine the target operating condition based on the first vehicle data.
- the target operating condition in response to the first vehicle data indicating a vehicle driving state, can be determined to be a discharge operating condition.
- the target operating condition in response to the first vehicle data indicating a connection to a charging power source, can be determined to be a charging operating condition. For example, if the first vehicle data indicates a DC power source 6 such as a DC charging gun is plugged in, the target operating condition can be determined to be a DC charging condition; if the first vehicle data indicates that an AC power source 5 such as an onboard power supply is charging the battery, the target operating condition can be determined to be an AC charging condition.
- the first vehicle data is the data collected at the current moment that is configured to determine the vehicle's operating condition.
- the controller can control the switching circuit K0 to determine the first battery 1 and/or the second battery 2 as the target battery, and turn on the charging and discharging circuit corresponding to the target battery so that the target battery can be charged and discharged.
- the discharge circuit corresponding to the target battery in response to the target operating condition being a discharge condition, can be turned on; in response to the target operating condition being a charging condition, the charging circuit corresponding to the target battery can be turned on.
- At least one of the first battery 1 and the second battery 2, which are connected in series, can be connected to the charging interface OUT1 or the power supply interface OUT2 via the switching circuit K0.
- This allows the charging interface OUT1 to charge at least one battery, or the power supply interface OUT2 to supply power to the load 4 or the motor 8.
- the two batteries When power demand is low, one battery can be controlled to connect to the circuit; when power demand is high, both batteries can be controlled to connect to the circuit, thereby increasing the driving range and meeting the specific needs of different operating conditions.
- the two batteries generally have different capacities, which satisfies the requirements of small size and low cost, and also allows for power supplementation when the required power is insufficient.
- the switching circuit K0 is controlled to open and close to achieve the connection of the target battery and control the target battery to charge and discharge, including: in response to the target operating condition being a discharge operating condition, the switching circuit K0 is controlled to open and close to make the discharge circuit corresponding to the target battery conduct and supply power to the load 4.
- the controller can control the switching circuit K0 to open or close according to the actual situation, so that the discharge circuit corresponding to the target battery is turned on, allowing the target battery to supply power to the load 4.
- the target battery here can be the first battery 1, the second battery 2, or a first battery 1 and a second battery 2 connected in series.
- the discharge circuit can be a direct discharge circuit or a boost discharge circuit as described in the above embodiment, specifically determined according to the output voltage of the target battery and the required supply voltage.
- the direct discharge circuit refers to a circuit where the battery can directly power the load 4 or the motor 8 without voltage conversion.
- the boost discharge circuit refers to a circuit where voltage conversion is required during the battery's power supply to the load 4 or the motor 8.
- the switching circuit K0 in response to the target operating condition being a discharge operating condition, the switching circuit K0 is controlled to open or close, so that the discharge circuit corresponding to the target battery is turned on, supplying power to the load 4, including:
- the battery with the output voltage greater than the required supply voltage is identified as the target battery.
- the switching circuit K0 is then controlled to open, activating the direct discharge circuit corresponding to the target battery, and using the target battery's output voltage to supply power to load 4.
- the battery connected to the bidirectional voltage conversion circuit 3 is identified as the target battery.
- the switching circuit K0 is controlled to turn on and off so that the boost discharge circuit corresponding to the target battery is turned on, and the output voltage of the target battery is boosted and converted to supply power to the load 4.
- step S11 when the target operating condition is the discharge operating condition, the controller needs to obtain the required supply voltage of the load 4 and compare the required supply voltage with the output voltage of the first battery 1 and the output voltage of the second battery 2.
- step S12 when the output voltage of the target battery is greater than the required supply voltage—that is, the output voltage of the first battery 1 is greater than the required supply voltage, or the output voltage of the second battery 2 is greater than the required supply voltage, or the output voltage of the first battery 1 and the second battery 2 connected in series is greater than the required supply voltage—the controller determines that the first battery 1 and/or the second battery 2 can provide the load 4 with the required supply voltage to meet its normal operation. Therefore, the battery with the output voltage greater than the required supply voltage is identified as the target battery.
- the first battery 1 in response to the first battery 1's output voltage being greater than the load 4's required supply voltage, the first battery 1 can be identified as the target battery, and the switching circuit K0 is controlled to open and close, so that the direct discharge circuit corresponding to the target battery is connected, using the target battery's output voltage to supply power to the load 4.
- the control process is simple.
- the direct discharge circuit refers to a circuit where the two ends of the battery are directly connected to the load 4, and the battery's output voltage can directly supply power to the load 4.
- the battery connected to the bidirectional voltage conversion circuit 3 can be identified as the target battery.
- the controller controls the switching circuit K0 to activate the corresponding boost discharge circuit of the target battery, performing a boost conversion on the target battery's output voltage.
- the boosted voltage is then used to supply power to the load 4, helping to ensure the normal operation of the load 4.
- the boost discharge circuit refers to the circuit where the two ends of the battery are connected to the load 4 through the bidirectional voltage conversion circuit 3.
- the circuit refers to the circuit where the two ends of the battery are connected to the third and second terminals of the bidirectional voltage conversion circuit 3, respectively, while the first and second terminals of the bidirectional voltage conversion circuit 3 are connected to the load 4, utilizing the bidirectional voltage conversion circuit 3 for boost conversion.
- the switching circuit K0 is controlled to open or close, thereby connecting the target battery and controlling the target battery to charge and discharge, including:
- the switching circuit K0 In response to the target operating condition being DC charging, the switching circuit K0 is controlled to open or close, so that the DC charging circuit corresponding to the target battery is turned on, thereby enabling the DC power supply 6 to charge the target battery;
- the switching circuit K0 In response to the target operating condition being AC charging, the switching circuit K0 is controlled to open or close, so that the AC charging circuit corresponding to the target battery is turned on, so that the AC power supply 5 charges the target battery.
- the controller controls the switching circuit K0 to turn on and off, so that the DC charging circuit corresponding to the target battery is turned on, so that the target component in the DC charging circuit works, so that the DC power supply 6 charges the target battery.
- the DC charging circuit can be any one of a direct-connect DC charging circuit, a boost DC charging circuit, or a buck DC charging circuit.
- the first battery 1 and/or the second battery 2 can be identified as the target battery based on the comparison between the supply voltage of the DC charging interface OUT152 and the battery's required charging voltage.
- the DC charging circuit corresponding to the target battery is then turned on so that the DC power supply 6 charges the target battery.
- the controller controls the switching circuit K0 to open or close, thereby activating the AC charging circuit corresponding to the target battery and enabling the AC power supply 5 to charge the target battery.
- the AC power supply 5 is generally the vehicle's onboard power supply, and its two ends are directly connected to the load 4, the AC charging circuit between the AC power supply 5 and the load 4 can be directly controlled to open.
- the vehicle's onboard power supply can be used to AC charge the target battery.
- the switching circuit K0 in response to the target operating condition being a DC charging condition, the switching circuit K0 is controlled to open or close, so that the DC charging circuit corresponding to the target battery is turned on, so that the DC power supply 6 charges the target battery, including:
- the supply voltage range of DC power supply 6 and the required charging voltage of the target battery are obtained;
- the switching circuit K0 In response to the demand charging voltage being within the supply voltage range, the switching circuit K0 is controlled to open or close, so that the direct DC charging circuit corresponding to the target battery is turned on.
- the switching circuit K0 In response to a charging voltage demand exceeding the supply voltage range, the switching circuit K0 is controlled to open or close, thereby activating the boost DC charging circuit corresponding to the target battery;
- the switching circuit K0 In response to the demand for charging power being less than the supply voltage range, the switching circuit K0 is turned on and off to enable the buck DC charging circuit corresponding to the target battery to conduct.
- the supply voltage range refers to the range formed by the lower and upper limits of the supply voltage that DC power supply 6 can provide; it is the voltage range that DC power supply 6 can provide.
- the required charging voltage refers to the charging voltage required by the target battery.
- the controller can interact with the charging pile to determine the supply voltage range of the DC power supply 6, and compare the supply voltage range with the required charging voltage of its target battery to determine the appropriate charging strategy.
- the controller determines that DC power supply 6 can provide the target battery with the required voltage. At this time, the controller can control the direct-connect DC charging circuit corresponding to the target battery to be activated, thereby enabling direct-connect DC charging of the target battery.
- the direct-connect DC charging circuit refers to the circuit where DC power supply 6 directly charges the target battery, that is, the circuit where the target battery is directly connected to the charging interface OUT1.
- the controller can determine that the upper limit of the supply voltage of the DC power supply 6 is less than the required charging voltage of the target battery. At this time, it is necessary to control the corresponding boost DC charging circuit of the target battery to be turned on, and to boost the output voltage of the DC power supply 6 through the bidirectional voltage conversion circuit 3 so that the boosted voltage is consistent with the required charging voltage of the target battery, thereby improving the charging efficiency.
- the boost DC charging circuit corresponding to the target battery refers to the circuit formed by connecting the two ends of the target battery to the first and second ends of the bidirectional voltage conversion circuit 3, respectively; and connecting the two ends of the DC power supply 6 to the third and second ends of the bidirectional voltage conversion circuit 3, respectively.
- the specific control process is as follows:
- the controller needs to control the buck DC charging circuit corresponding to the target battery to be turned on, and control the bidirectional voltage conversion circuit 3 to perform buck conversion on the output voltage of the DC power supply 6 so that the voltage after buck conversion is consistent with the required charging voltage of the target battery, so as to avoid the charging voltage being too high and causing damage to the target battery.
- the step-down DC charging circuit corresponding to the target battery refers to the circuit where the first terminal of the target battery is connected to the first and third terminals of the bidirectional voltage conversion circuit 3; the second terminal of the target battery is connected to the second terminal of the bidirectional voltage conversion circuit 3; and the two ends of the DC power supply 6 are connected to the first and second terminals of the bidirectional voltage conversion circuit 3 respectively.
- the step-down charging process is as follows:
- the input voltage across the battery when the input voltage across the battery is less than the supply voltage of the DC charging interface OUT1 during charging, the input voltage across the battery can be adjusted by adjusting the upper bridge power transistor T1 and the lower bridge power transistor T2 to achieve a step-down charging effect.
- the charging voltage across the target battery can be made lower than the output voltage of the DC power supply 6, thereby achieving a step-down charging effect.
- the different charging circuits corresponding to the target battery can be controlled to be turned on, so as to adapt to the specific situation of different DC power supplies 6 and meet different needs.
- This application provides a self-heating method applicable to the power battery described in the above embodiments, comprising:
- the battery to be heated is determined, and the switching circuit K0 is controlled to turn on and off so that the self-heating circuit corresponding to the battery to be heated is turned on, so that the battery to be heated can be self-heated.
- the controller needs to acquire the current battery data of both batteries in order to assess whether the batteries are in a low-temperature operating condition based on this current battery data.
- current battery data refers to the battery data retrieved at the current moment.
- the controller determines that at least one battery is in a low-temperature condition based on the current battery data corresponding to the two batteries, then the battery in the low-temperature condition is identified as the battery to be heated. For example, if the first battery 1 is in a low-temperature condition, then the first battery 1 is identified as the battery to be heated, and the self-heating circuit corresponding to the battery to be heated is turned on so that the battery to be heated can perform self-heating operation, thereby increasing the temperature of the battery to be heated to ensure the normal operation of the battery.
- At least one of the first battery 1 and the second battery 2 is determined to be the battery to be heated.
- the battery to be heated is connected to the third and second terminals of the bidirectional voltage conversion circuit 3 through the switching circuit K0.
- the third and second terminals of the bidirectional voltage conversion circuit 3 are respectively connected to the two ends of the first capacitor C1 to form a self-heating circuit corresponding to the battery to be heated.
- the self-heating circuit is turned on, the battery in the self-heating circuit is self-heated.
- the self-heating process of the first self-heating circuit corresponding to the first battery 1 is as follows: First, control the first battery 1 to be connected to the circuit, then control the lower bridge power transistor T2 in the bidirectional voltage conversion circuit 3 to be turned on and the upper bridge power transistor T1 to be turned off, so that the first battery 1 charges the first inductor L1 and charges the first capacitor C1 through the diode connected in parallel with the upper bridge power transistor T1; then, control the lower bridge power transistor T2 to be turned off and the upper bridge power transistor T1 to be turned on, and use the first capacitor C1 and the first inductor L1 to charge the first battery 1 to complete the self-heating process of the battery to be heated.
- the self-heating process is as follows: First, control the switching circuit K0 to turn on, so that the first battery 1 and the second battery 2 are connected in series in the circuit. Then, control the lower bridge power transistor T2 in the bidirectional voltage conversion circuit 3 to turn on and the upper bridge power transistor T1 to turn off, so that the first battery 1 charges the first inductor L1 and charges the first capacitor C1 and the second battery 2 through the diode connected in parallel with the upper bridge power transistor T1. Then, control the lower bridge power transistor T2 to turn off and the upper bridge power transistor T1 to turn on, so that the first battery 1 is charged using the first capacitor C1 and the second battery 2, thereby completing the self-heating process of the battery to be heated.
- determining the battery to be heated based on the current battery data corresponding to the two batteries includes:
- the two batteries are identified as batteries to be heated.
- the controller compares the current battery data for each battery with its corresponding low-temperature operating conditions. If the current battery data of one of the two batteries meets its corresponding low-temperature operating conditions, that battery is identified as a battery to be heated under low-temperature conditions. Since its temperature is low, it may affect normal operation. Therefore, the self-heating circuit corresponding to the battery to be heated can be activated to self-heat the single battery.
- the self-heating circuit corresponding to the first battery 1 is controlled to self-heat the first battery 1. This process is not limited by whether the second battery 2 needs to be heated, and the first battery 1 can be self-heated independently.
- the controller compares the current battery data corresponding to the battery with its corresponding low-temperature operating conditions. In response to the fact that both current battery data meet their corresponding low-temperature operating conditions, it is determined that both the first battery 1 and the second battery 2 are in low-temperature operating conditions. At this time, both the first battery 1 and the second battery 2 can be identified as batteries to be heated.
- the self-heating circuit corresponding to the battery to be heated is used to self-heat the first battery 1 and the second battery 2. The mutual heating efficiency of the two batteries is faster and more conducive to quickly raising the battery temperature to ensure the normal operation of the batteries.
- the current battery data includes the current battery temperature; the low-temperature condition is when the current battery temperature is lower than its corresponding low-temperature threshold.
- the current battery temperature is the battery temperature detected in real time.
- the low-temperature threshold is a pre-set temperature threshold configured to assess whether the battery temperature has reached the corresponding low-temperature operating condition.
- the controller can determine that the battery to be heated is in a low temperature state, which may affect its normal operation. At this time, the controller can control the self-heating circuit corresponding to the battery to be heated to self-heat the battery to avoid the battery to be heated from working under low temperature conditions, affecting its current output power, or even posing a safety hazard.
- the current battery data includes the current battery temperature and the current output power; the low-temperature operating condition is that the current battery temperature is lower than its corresponding low-temperature threshold and the current output power is lower than its corresponding low-temperature power threshold.
- the battery's current output power is the real-time output power detected during the battery's operation.
- the low-temperature power threshold is a pre-set power threshold configured to assess whether the current output power affects its normal operation.
- the controller determines that the battery to be heated is in a low temperature state and that the low temperature of the battery to be heated has affected its power output.
- the controller can control the self-heating circuit corresponding to the battery to be heated to self-heat the battery to avoid the battery to be heated from working under low temperature conditions, affecting its current output power, or even posing a safety hazard.
- this application also provides a drive system 200, including a battery assembly 10, a power supply interface OUT2, and a drive module 7; the drive module 7 is connected to the power supply interface OUT2 and is configured to connect to a motor 8.
- the drive system 200 includes a battery assembly 10. At least one of the first battery 1 and the second battery 2 can be connected to the circuit via a switching circuit K0 to power the drive module 7, thereby enabling the drive module 7 to drive the motor 8.
- the number of drive modules 7 can be one or more, depending on the actual situation.
- At least one of the first battery 1 and the second battery 2 can be controlled to supply power to the drive module 7 so that the drive module 7 can perform drive control operations.
- the battery assembly 10 includes at least one second bridge arm; the second bridge arm includes a third power transistor T3 and a fourth power transistor T4 connected in series; at least one third power transistor T3 is connected to form a first end of the drive module 7; at least one fourth power transistor T4 is connected to form a second end of the drive module 7; the first end and the second end of the drive module 7 are connected to the two ends of a target battery, which is a first battery 1 and/or a second battery 2; the connection node between each third power transistor T3 and the fourth power transistor T4 is the midpoint of the second bridge arm and is configured to connect a motor 8.
- the drive module 7 includes at least one second bridge arm, which includes a third power transistor T3 and a fourth power transistor T4 connected in series. At least one third power transistor T3 is connected to form the first end of the drive module 7; at least one fourth power transistor T4 is connected to form the second end of the drive module 7; the first end and the second end of the drive module 7 are connected to the two ends of the target battery, which is the first battery 1 and/or the second battery 2; the connection node between the third power transistor T3 and the fourth power transistor T4 is the midpoint of the second bridge arm and is configured to connect the motor 8.
- Either the third power transistor T3 or the fourth power transistor T4 is the upper bridge power transistor, and the other is the lower bridge power transistor, configured to be connected to the negative terminal of the target battery.
- the upper bridge power transistor is connected to the positive terminal of the target battery and is configured to control the forward and reverse rotation of the motor 8.
- the lower bridge power transistor is connected to the negative terminal of the target battery and is configured to control the braking and stopping of the motor 8.
- At least one of the first battery 1 and the second battery 2 provides energy to the drive module 7 so that the drive module 7 drives the motor 8 to work.
- this application also provides a drive control method applicable to a drive system 200, the drive control method including:
- the switching circuit K0 is turned on and off to connect the target battery and control the drive module 7 to drive the motor 8 to work; the target battery is the first battery 1 and/or the second battery 2.
- the controller can determine the current vehicle mode based on the actual situation.
- the current vehicle mode can be any of the following: pure electric mode, hybrid mode, depleted battery mode, and rechargeable battery mode.
- the controller can identify the first battery 1 and/or the second battery 2 as the target battery.
- the first battery 1 can be designated as the target battery
- the second battery 2 can be designated as the target battery
- both the first battery 1 and the second battery 2 can be designated as the target batteries simultaneously.
- the switching circuit K0 is controlled to connect the target battery and the drive module 7, supply power to the drive module 7, and power the motor 8 to ensure the normal operation of the motor 8.
- a switching circuit K0 is used to control the connection between the target battery and the drive module 7, so as to switch the target battery with different energy to power the drive module 7 according to the specific situation, so as to meet the needs of different working conditions.
- a bidirectional voltage conversion circuit 3 can be set in the switching circuit K0.
- the bidirectional voltage conversion circuit 3 can be controlled to perform bidirectional voltage conversion on the output voltage of the battery according to the actual situation. That is, it can perform both boost conversion and buck conversion to ensure that the drive motor 8 is provided with energy that meets the requirements.
- the switching circuit K0 is controlled to open or close, thereby connecting the target battery and controlling the drive module 7 to drive the motor 8, including:
- the battery with the smaller charge between the first battery 1 and the second battery 2 is identified as the target battery.
- the switching circuit K0 is controlled to open and close to achieve connection of the target battery, and the drive module 7 is controlled to drive the motor 8 to work.
- the battery corresponding to the larger current output power is identified as the target battery.
- the switching circuit K0 is controlled to open and close, thus connecting the target battery and controlling drive module 7 to drive motor 8.
- the first battery 1 and the second battery 2 are identified as target batteries.
- the switching circuit K0 is controlled to open and close, thereby connecting the target batteries and controlling the drive module 7 to drive the motor 8 to work.
- the controller when the vehicle's current mode is a power-down mode, the controller identifies the battery with the smaller charge in the first battery 1 and the second battery 2, such as the HEV battery with the smaller charge in the EV battery and the HEV battery, as the target battery. It controls the switching circuit K0 to open and close, so as to connect the target battery. It also controls the drive module 7 to drive the motor 8 to work, so that in the power-down mode, the drive module 7 controls the motor 8 to work through the battery with the smaller charge.
- the controller determines that the motor 8 with the larger current output power can provide the energy required by motor 8. Therefore, the battery corresponding to the larger current output power is determined as the target battery.
- an EV battery with a higher current output power can be identified as the target battery, and the switching circuit K0 can be turned on and off to connect the target battery and control the drive module 7 to drive the motor 8.
- the current mode of the vehicle is not the power-recharged mode, but any one of the pure electric mode, hybrid mode, and recharge mode, and the power demand of the motor 8 is greater than the larger of the current output power of the two batteries, the energy provided by a single battery cannot meet the power demand of the motor 8. Therefore, the first battery 1 and the second battery 2 need to be identified as target batteries, and the switching circuit K0 is controlled to achieve the connection of the target batteries, thereby controlling the drive module 7 to drive the motor 8 to work.
- the output voltage of the battery in response to the bidirectional voltage conversion circuit 3 provided in the switching circuit K0, can also be bidirectionally converted by controlling the bidirectional voltage conversion circuit 3, that is, it can perform both boost conversion and buck conversion to ensure that the drive motor 8 is provided with energy that meets the requirements.
- the power demand of the motor 8 is greater than the current output power of the EV battery.
- the EV battery and the HEV battery need to be connected in series to the two buses to achieve power supplementation when the power is insufficient.
- this application also provides a controller, including a memory, a processor, and a computer program stored in the memory and executable on the processor.
- the processor executes the computer program, it implements a charging and discharging control method, a self-heating method, or a drive control method.
- this application also provides a vehicle including a battery assembly 10, or a charging and discharging system 100, or a drive system 200 and a motor 8.
- this application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements a charging/discharging control method, a self-heating method, or a drive control method.
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Abstract
一种汽车,设有电池总成或放电系统或驱动系统或计算机可读存储介质,放电系统、驱动系统设有电池总成,自加热方法、充放电控制方法、及驱动控制方法以计算机程序的形式存储于计算机可读存储介质。电池总成包括第一电池、第二电池、开关电路和双向电压转换电路;第一电池与第二电池之间的电量或峰值放电倍率不同;第一电池通过开关电路连接充电或供电等接口;第二电池通过开关电路连接双向电压转换电路;双向电压转换电路被配置为连接充电或供电等接口。
Description
本申请要求在2024年05月06日提交中国专利局、申请号为202410553181.4的中国专利申请的优先权,以上申请的全部内容通过引用结合在本申请中。
本申请涉及电池技术领域,具体涉及一种电池总成、充放电系统、驱动系统、方法、汽车及介质。
电动汽车供电系统可以采用单一电池包给整车负载和电机供电,并通过直流充电接口和交流充电接口给电池包充电。
当电动汽车采用单一电池包作为动力源时,电池包会存在故障或者其他特殊情况,导致其无法给整车负载和电机供电,影响车辆使用甚至存在安全隐患,同时单一电池包所提供的电量有限,无法满足高速或者其他需求功率较高的行驶工况的需求。
第一方面,本申请提供了一种电池总成,包括:
开关电路;
第一电池,第一电池通过开关电路连接充电接口或者供电接口;
第二电池,第二电池的电量小于第一电池的电量,或第二电池的峰值放电倍率大于第一电池的峰值放电倍率;及
双向电压转换电路,双向电压转换电路被配置为连接充电接口或者供电接口;
其中,第二电池,通过开关电路,与双向电压转换电路相连。
在一个实施例中,第一电池的电量为第二电池的电量的2-100倍,或第二电池的峰值放电倍率为第一电池的峰值放电倍率的2-50倍。
在一个实施例中,第一电池,还通过开关电路与双向电压转换电路相连,双向电压转换电路用于连接充电接口或者供电接口。
在一个实施例中,双向电压转换电路包括第一电压转换电路和第二电压转换电路,或者,双向电压转换电路包括第二电压转换电路;
第一电池,通过开关电路与第一电压转换电路相连;及
第二电池,通过开关电路与第二电压转换电路相连。
在一个实施例中,开关电路包括第一开关、第二开关和第三开关;
第一电池的第一端与第一开关的第一端相连,第二电池的第一端与第三开关的第一端相连;
第一电池的第二端和第二电池的第二端均与第二开关的第一端相连;
第一电压转换电路,与第一开关的第二端和/或第二开关的第二端相连;及
第二电压转换电路,与第三开关的第二端和/或第二开关的第二端相连。
在一个实施例中,电池总成还包括第一电容;
第一电容的两端,与第一电压转换电路和/或第二电压转换电路相连。
在一个实施例中,开关电路还包括第一预充开关组件和/或第二预充开关组件;
第一预充开关组件,设置在第一电池和第一电容之间;及
第二预充开关组件,设置在第二电池和第一电容之间。
在一个实施例中,开关电路还包括第四开关和/或第五开关;
第四开关的第一端,与第一电压转换电路和第一电池之间的连接节点相连,第四开关的第二端用于连接供电接口或者交流充电接口;及
第五开关的第一端,与第二电压转换电路和第二电池之间的连接节点相连,第五开关的第二端用于连接供电接口或者交流充电接口。
在一个实施例中,开关电路还包括第六开关和/或第七开关;
第六开关的第一端,与第一电压转换电路和第一电池之间的连接节点相连,第六开关的第二端用于连接直流充电接口;及
第七开关的第一端,与第二电压转换电路和第二电池之间的连接节点相连,第七开关的第二端用于连接直流充电接口。
第二方面,本申请还提供了一种充放电系统,包括第一方面提供的电池总成、充电接口和供电接口;
充电接口用于连接充电电源;及
供电接口用于连接负载。
在一个实施例中,充电接口包括交流充电接口和直流充电接口中的至少一个,交流充电接口用于连接交流电源,直流充电接口用于连接直流电源。
第三方面,本申请还提供了一种充放电控制方法,适用在第二方面提供的充放电系统,充放电控制方法包括:
基于目标工况,控制开关电路的通断,以实现目标电池的连通,控制目标电池进行充放电;及
目标电池为第一电池和/或第二电池。
在一个实施例中,基于目标工况,控制开关电路的通断,以实现目标电池的连通,控制目标电池进行充放电,包括:
响应于目标工况为放电工况,控制开关电路的通断,以使目标电池对应的放电回路导通,给负载供电。
在一个实施例中,响应于目标工况为放电工况,控制开关电路的通断,以使目标电池对应的放电回路导通,给负载供电,包括:
响应于目标工况为放电工况,获取负载的需求供电电压;
响应于目标电池的输出电压大于需求供电电压,将输出电压大于需求供电电压的电池,确定为目标电池,控制开关电路的通断,以使目标电池对应的直连放电回路导通,利用目标电池的输出电压给负载供电;及
响应于目标电池的输出电压不大于需求供电电压,将与双向电压转换电路相连的电池,确定为目标电池,控制开关电路的通断,以使目标电池对应的升压放电回路导通,对目标电池的输出电压进行升压转换,利用升压转换后的电压给负载供电。
在一个实施例中,基于目标工况,控制开关电路的通断,以实现目标电池的连通,控制目标电池进行充放电,包括:
响应于目标工况为直流充电工况,控制开关电路的通断,以使目标电池对应的直流充电回路导通,以使直流电源对目标电池充电;及
响应于目标工况为交流充电工况,控制开关电路的通断,以使目标电池对应的交流充电回路导通,以使交流电源对目标电池充电。
在一个实施例中,响应于目标工况为直流充电工况,控制开关电路的通断,以使目标电池对应的直流充电回路导通,以使直流电源对目标电池充电,包括:
响应于目标工况为直流充电工况,获取直流电源的供电电压范围和目标电池的需求充电电压;
响应于需求充电电压在供电电压范围内,控制开关电路的通断,以使目标电池对应的直连直流充电回路导通;
响应于需求充电电压大于供电电压范围,控制开关电路的通断,以使目标电池对应的升压直流充电回路导通;及
响应于需求充电电源小于供电电压范围,控制开关电路的通断,以使目标电池对应的降压直流充电回路导通。
第四方面,本申请还提供了一种自加热方法,适用在第二方面提供的充放电系统,自加热方法包括:
获取两个电池对应的当前电池数据;及
基于两个电池对应的当前电池数据,确定待加热电池,控制开关电路的通断,以使待加热电池对应的自加热回路导通,对待加热电池进行自加热。
在一个实施例中,基于两个电池对应的当前电池数据,确定待加热电池,包括:
响应于两个电池中,存在一个电池对应的当前电池数据满足其对应的低温工况条件,将电池,确定为待加热电池;及
响应于两个电池对应的当前电池数据满足其对应的低温工况条件,将两个电池确定为待加热电池。
在一个实施例中,当前电池数据包括当前电池温度;
低温工况条件为电池对应的当前电池温度小于其对应的低温温度阈值。
在一个实施例中,当前电池数据包括当前电池温度和当前输出功率;及
低温工况条件为电池对应的当前电池温度小于其对应的低温温度阈值,且电池对应的当前输出功率小于其对应的低温功率阈值。
第五方面,本申请还提供了一种驱动系统,包括第一方面提供的电池总成、供电接口和驱动模块;
驱动模块与供电接口相连,并用于连接电机。
第六方面,本申请还提供了一种驱动控制方法,适用在第五方面提供的驱动系统中,驱动控制方法包括:
响应于车辆处于驱动工况,获取整车当前模式;
基于整车当前模式,控制开关电路的通断,以实现目标电池的连通,控制驱动模块驱动电机工作;及
目标电池为第一电池和/或第二电池。
在一个实施例中,基于整车当前模式,控制开关电路的通断,以实现目标电池的连通,控制驱动模块驱动电机工作,包括:
响应于整车当前模式为馈电模式,将第一电池和第二电池中电量较小的电池,确定为目标电池,控制开关电路的通断,以实现目标电池的连通,控制驱动模块驱动电机工作;
响应于整车当前模式为纯电模式、混动模式和补能模式,且电机的需求功率小于或等于两个电池的当前输出功率的较大值,将当前输出功率的较大值对应的电池确定为目标电池,控制开关电路的通断,以实现目标电池的连通,控制驱动模块驱动电机工作;及
响应于整车当前模式为纯电模式、混动模式和补能模式,且电机的需求功率大于电池的当前输出功率的较大值,将第一电池和第二电池确定为目标电池,控制开关电路的通断,以实现目标电池的连通,控制驱动模块驱动电机工作。
第七方面,本申请还提供了一种控制器,包括存储器、处理器以及存储在存储器中并可在处理器上运行的计算机程序,处理器执行计算机程序时实现上述充放电控制方法,实现第四方面提供的自加热方法、或者实现第六方面提供的驱动控制方法。
第八方面,本申请还提供了一种汽车,包括第一方面提供的电池总成或第二方面提供的充放电系统或第五方面提供的驱动系统和电机。
第九方面,本申请还提供了一种计算机可读存储介质,计算机可读存储介质存储有计算机程序,计算机程序被处理器执行时实现第三方面提供的充放电控制方法,实现第四方面提供的自加热方法、或者实现第六方面提供的驱动控制方法。
本申请提供的电池总成、充放电系统、驱动系统、方法、汽车及介质,可通过开关电路将并联设置的第一电池和第二电池中的至少一个,接入充电接口或供电接口,使得充电电源可通过充电接口,对至少一个电池进行充电;或者至少一个电池可通过供电接口给负载或与驱动模块相连的电机供电,以满足不同需求,第一电池和第二电池的电量一般不相同,可以满足体积小且成本低的要求,又能够在需求功率不足时进行功率补充。
为了更清楚地说明本申请实施例的技术方案,下面将对本申请实施例的描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。
图1是本申请提供的电池总成的示意框图;
图2是本申请提供的电池总成的一电路示意图;
图3是本申请提供的电池总成的另一电路示意图;
图4是本申请提供的充放电系统的示意框图;
图5是本申请提供的驱动系统的示意框图。
图中:10、电池总成;100、充放电系统;200、驱动系统、1、第一电池;2、第二电池;3、双向电压转换电路;31、第一电压转换电路;32、第二电压转换电路;4、负载;5、交流电源;6、直流电源;7、驱动模块;8、电机。
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
应当理解的是,本申请能够以不同形式实施,而不应当解释为局限于这里提出的实施例。相反地,提供这些实施例将使公开彻底和完全,并且将本申请的范围完全地传递给本领域技术人员。在附图中,为了清楚,层和区的尺寸以及相对尺寸可能被夸大自始至终相同附图标记表示相同的元件。
应当明白,当元件或层被称为“在…上”、“与…相邻”、“连接到”或“耦合到”其它元件或层时,其可以直接地在其它元件或层上、与之相邻、连接或耦合到其它元件或层,或者可以存在居间的元件或层。相反,当元件被称为“直接在…上”、“与…直接相邻”、“直接连接到”或“直接耦合到”其它元件或层时,则不存在居间的元件或层。应当明白,尽管可使用术语第一、第二、第三等描述各种元件、部件、区、层和/或部分,这些元件、部件、区、层和/或部分不应当被这些术语限制。这些术语仅仅用来区分一个元件、部件、区、层或部分与另一个元件、部件、区、层或部分。因此,在不脱离本申请教导之下,下面讨论的第一元件、部件、区、层或部分可表示为第二元件、部件、区、层或部分。
空间关系术语例如“在…下”、“在…下面”、“下面的”、“在…之下”、“在…之上”、“上面的”等,在这里可为了方便描述而被使用从而描述图中所示的一个元件或特征与其它元件或特征的关系。应当明白,除了图中所示的取向以外,空间关系术语意图还包括使用和操作中的器件的不同取向。例如,如果附图中的器件翻转,然后,描述为“在其它元件下面”或“在其之下”或“在其下”元件或特征将取向为在其它元件或特征“上”。因此,示例性术语“在…下面”和“在…下”可包括上和下两个取向。器件可以另外地取向(旋转90度或其它取向)并且在此使用的空间描述语相应地被解释。
在此使用的术语的目的仅在于描述具体实施例并且不作为本申请的限制。在此使用时,单数形式的“一”、“一个”和“所述/该”也意图包括复数形式,除非上下文清楚指出另外的方式。还应明白术语“组成”和/或“包括”,当在该说明书中使用时,确定所述特征、整数、步骤、操作、元件和/或部件的存在,但不排除一个或更多其它的特征、整数、步骤、操作、元件、部件和/或组的存在或添加。在此使用时,术语“和/或”包括相关所列项目的任何及所有组合。
为了彻底理解本申请,将在下列的描述中提出详细的结构及步骤,以便阐释本申请提出的技术方案。本申请的较佳实施例详细描述如下,然而除了这些详细描述外,本申请还可以具有其他实施方式。
本申请实施例提供一种电池总成10,如图1、图2和图3所示,该电池总成10包括第一电池1、第二电池2、开关电路K0和双向电压转换电路3;第一电池1的电量大于第二电池2的电量,或,第一电池1的峰值放电倍率小于第二电池2的峰值放电倍率;第一电池1,通过开关电路K0,连接充电接口OUT1或者供电接口OUT2;第二电池2,通过开关电路K0,与双向电压转换电路3相连,双向电压转换电路3被配置为连接充电接口OUT1或者供电接口OUT2。
其中,第一电池1和第二电池2为电池总成10的两个电池,两个电池的第一端互为正极和负极。
作为一示例,第一电池1的电量大于第二电池2的电量,或,第一电池1的峰值放电倍率小于第二电池2的峰值放电倍率,即第一电池1为电量大或者峰值放电倍率小的电池。
例如,第一电池1为EV电池,可满足整车纯电EV工况的正常行驶。第二电池2为电量小或者峰值放电倍率大的电池,例如,第二电池2为HEV电池,可满足整车起步、急加速和超车等极限工况补充峰值功率需求。
作为一示例,若在电池总成10中采用两个电量相同的电池,其整体体积较大,安装空间不够且成本较高;但若采用一个电池,会在极限工况下存在功率不足的情况,因此,综合考虑,会使两个电池中,任一个电池的电量大且峰值放电倍率小,另一个电池的电量小且峰值放电倍率大,既满足体积小且成本低的要求,又能够在需求功率不足时进行功率补充。
其中,充电接口OUT1是被配置为连接充电电源的接口,充电接口OUT1包括正极充电接口和负极充电接口,需与至少一个电池的两端相连。供电接口OUT2是被配置为连接用电设备的接口,一般来说,供电接口OUT2包括正极供电接口和负极供电接口,需与至少一个电池的两端相连。
作为一示例,第一电池1和第二电池2并联设置,即第一电池1的两端,与充电接口OUT1或者供电接口OUT2相连;而第二电池2的两端,也与充电接口OUT1或者供电接口OUT2相连,通过控制开关电路K0的通断,可将第一电池1和/或第二电池2,与充电接口OUT1相连,以接收充电电源的充电;或者,给供电接口OUT2对应的用电设备供电。
其中,双向电压转换电路3是既可实现升压转换,又可实现降压转换控制的电路。
作为一示例,双向电压转换电路3包括至少一个电压转换单元,每一电压转换单元包括第一桥臂和第一电感L1。第一桥臂包括串联设置的第一功率管T1和第二功率管T2,第一功率管T1和第二功率管T2之间的连接节点为第一桥臂的中点,第一功率管T1和第二功率管T2中,被配置为连接电池正极、正极充电接口和正极供电接口的功率管为上桥功率管,而被配置为连接电池负极、负极充电接口和负极供电接口的功率管为下桥功率管。
本示例中,双向电压转换电路3包括至少一个第一桥臂,至少一个第一桥臂的第一端和第二端,为串联设置的第一功率管T1和第二功率管T2的两端。
其中,至少一个第一桥臂的第一端汇流,形成双向电压转换电路3的第一端,至少一个第一桥臂的第二端汇流,形成双向电压转换电路3的第二端,双向电压转换电路3的第一端和第二端,被配置为连接充电接口OUT1或供电接口OUT2,可理解为,将至少一个第一桥臂的两端分别与正极充电接口和负极充电接口相连,并将至少一个第一桥臂的两端分别与正极供电接口或者负极供电接口相连。本示例中,双向电压转换电路3还包括至少一个第一电感L1,每一第一电感L1的第一端与一第一桥臂的中点相连,至少一个第一电感L1的第二端汇流,形成双向电压转换电路3的第三端,双向电压转换电路3的第三端与第二端的极性相反,使其可连接在至少一个电池的两端,既可控制至少一个电池与充电接口OUT1或供电接口OUT2,又可实现电压转换。
作为一示例,电池总成10还包括第二电容C2,第二电容C2的两端,分别与双向电压转换电路3的第三端和双向电压转换电路3的第二端相连,以实现在第一电池1和/或第二电池2接入电路时,利用第二电容C2与双向电压转换电路3中的第一电感L1配合形成LC滤波电路,通过复用第一电感L1实现储能和滤波效果,并可有效减少电池总成10中的元件数量,有助于节省电路成本。
作为一示例,该电池总成10还设有开关电路K0,开关电路K0既可将第一电池1的两端与充电接口OUT1或供电接口OUT2相连,以单独控制第一电池1连接充电电源,以接收充电电源的充电,或者单独控制第一电池1与供电接口OUT2相连,以给用电设备供电,例如,给负载4或者驱动模块7供电。也可将第二电池2的两端与充电接口OUT1或供电接口OUT2,以单独控制第二电池2连接充电电源,以接收充电电源的充电,或者单独控制第一电池1与供电接口OUT2相连,以给用电设备供电,例如,给负载4或者驱动模块7供电。还可将第一电池1和第二电池2同时接入电路,由于第一电池1和第二电池2并联设置,在其与充电接口OUT1或供电接口OUT2相连时,需保障两个电池的输入电压或输出电压一致,因此,还需设置双向电压转换电路3,将双向电压转换电路3与第二电池2相连,以对第二电池2的输入电压或输出电压进行电压转换,以使两个电池的输入电压或输出电压一致,以使两个电池可同时实现充电或供电功能。
本实施例中,可通过开关电路K0将并联设置的第一电池1和第二电池2中的至少一个,接入充电接口OUT1或供电接口OUT2,使得充电电源可通过充电接口OUT1,对至少一个电池进行充电;或者至少一个电池可通过供电接口OUT2给负载4或与驱动模块7相连的电机8供电,以满足不同需求。
同时,两个电池的电量一般不相同,即可以满足体积小且成本低的要求,又能够在需求功率不足时进行功率补充。
例如,响应于供电接口OUT2通过驱动模块7与电机8相连,且响应于车辆处于馈电模式,可控制第二电池2单独驱动电机8工作;响应于车辆处于正常行驶工况,可单独控制第一电池1驱动电机8工作;响应于车辆处于高速超车、零百加速、极限脱困、高速爬坡等用电需求较高的极限工况,可利用双向电压转换电路3对第二电池2的输出电压进行升压转换,以使升压转换后的电池与第一电池1的输出电压一致,通过第二电池2对第一电池1进行功率补充,以满足高用电需求的具体需求。
在一实施例中,第一电池1的电量为第二电池2的电量的2-100倍,或第二电池2的峰值放电倍率为第一电池1的峰值放电倍率的2-50倍。
作为一示例,第一电池1的电量为第二电池2的电量的2-100倍,且第一电池1的峰值放电倍率小于第二电池2的峰值放电倍率,以保障第一电池1可有效满足整车纯电EV工况的正常行驶需求。
作为另一示例,第一电池1的电量大于第二电池2的电量,且第二电池2的峰值放电倍率为第一电池1的峰值放电倍率的2-50倍,可保障第二电池2可有效满足整车起步、急加速和超车等极限工况补充峰值功率需求。
作为又一示例,第一电池1的电量为第二电池2的电量的2-100倍,且第二电池2的峰值放电倍率为第一电池1的峰值放电倍率的2-50倍,使得第一电池1可满足整车纯电EV工况的正常行驶需求,且第二电池2可有效满足整车起步、急加速和超车等极限工况补充峰值功率需求,可这些情况下,通过双向电压转换电路3进行电压调整,通过第二电池2补充第一电池1不足的功率,使其可满足不同工况。
在一实施例中,第一电池1,还通过开关电路K0与双向电压转换电路3相连,双向电压转换电路3被配置为连接充电接口OUT1或者供电接口OUT2。
作为一示例,第一电池1还通过开关电路K0,与双向电压转换电路3相连,该双向电压转换电路3被配置为连接充电接口OUT1或供电接口OUT2,也就是说,可利用双向电压转换电路3,对第一电池1的输入电压或者输出电压进行转换,以使其输入电压与电池需求相匹配,或者使其输出电压与用电设备的需求相匹配。本示例中,双向电压转换电路3的第一端和第二端,被配置为连接充电接口OUT1或供电接口OUT2,而双向电压转换电路3的第三端和第二端,分别与第二电池2的两端相连,以控制第二电池2连接充电接口OUT1或供电接口OUT2,并可实现电压转换。
双向电压转换电路3包括第一电压转换电路31和第二电压转换电路32,或者,双向电压转换电路3包括第二电压转换电路32;第一电池1,通过开关电路K0与第一电压转换电路31相连;第二电池2,通过开关电路K0与第二电压转换电路32相连。
作为一示例,双向电压转换电路3可以包括第一电压转换电路31和第二电压转换电路32,也可以仅包括第二电压转换电路32。第一电池1,通过开关电路K0与第一电压转换电路31相连,第一电压转换电路31被配置为对第一电池1的输入电压或者输出电压进行电压转换。第二电池2,通过开关电路K0与第二电压转换电路32相连,第二电压转换电路32被配置为对第二电池2的输入电压或者输出电压进行电压转换。
作为一示例,如图3所示,双向电压转换电路3可以仅包括第二电压转换电路32,该第二电压转换电路32的第一端和第二端,被配置为连接充电接口OUT1或者供电接口OUT2;第二电压转换电路32的第三端和第二端,被配置为通过开关电路K0与第二电池2的两端相连,利用第二电压转换电路32对第二电池2的输入电压或者输出电压进行电压转换,以满足不同工况对应的电压需求;或者,控制第二电压转换电路32对第二电池2的输出电压进行电压转换,以满足不同工况对应的电压需求。
作为一示例,如图2所示,双向电压转换电路3还可以包括第一电压转换电路31和第二电压转换电路32,第一电压转换电路31和第二电压转换电路32的第一端和第二端,被配置为连接充电接口OUT1或者供电接口OUT2;第一电压转换电路31的第三端和第二端,被配置为通过开关电路K0与第一电池1的两端相连;第二电压转换电路32的第三端和第二端,通过开关电路K0与第二电池2的两端相连。
本示例中,通过控制开关电路K0的通断,控制第一电压转换电路31和第二电压转换电路32中的至少一个工作,以对两个电池的输入电压或者输出电压进行调整,保障两个电池的正常工作。
例如,响应于电池总成10处于供电工况,将第一电池1和第二电池2并联接入充电接口OUT1或者供电接口OUT2,需要控制第一电压转换电路31和第二电压转换电路32中的至少一个工作,以使第一电池1和第二电池2的输出电压一致,以保障两个电池并联给负载4或驱动模块7供电的可行性。
本示例中,第一电池1通过开关电路K0与第一电压转换电路31相连,第二电池2通过开关电路K0与第二电压转换电路32相连,利用第一电压转换电路31对第一电池1的输入电压或输出电压进行转换,和/或利用第二电压转换电路32对第二电池2的输入电压或者输出电压进行转换,以保障第一电池1和/或第二电池2接入充电接口OUT1时,以使其输入电压与电池需求相匹配,或者第一电池1和/或第二电池2接入供电接口OUT2时,使其输出电压与用电设备的需求相匹配。
在一实施例中,开关电路K0包括第一开关K1、第二开关K2和第三开关K3;第一电池1的第一端与第一开关K1的第一端相连,第二电池2的第一端与第三开关K3的第一端相连;第一电池1的第二端和第二电池2的第二端均与第二开关K2的第一端相连;第一电压转换电路31,与第一开关K1的第二端和/或第二开关K2的第二端相连;第二电压转换电路32,与第三开关K3的第二端和/或第二开关K2的第二端相连。
作为一示例,开关电路K0包括第一开关K1、第二开关K2和第三开关K3。电池的第一端和第二端,互为电池的正极和负极。
响应于电池的第一端为正极,而第二端为负极,第一电池1的正极与第一开关K1相连,第二电池2的正极与第三开关K3相连,而第一电池1的负极和第二电池2的负极均与第二开关K2相连,使得第一电池1的两端分别与第一开关K1和第二开关K2相连,而第二电池2的两端分别与第三开关K3和第二开关K2相连,通过复用第二开关K2,可有助于减少电池总成10中的开关数量,进而降低成本。
本示例中,响应于第一电池1的两端分别与第一开关K1和第二开关K2相连,可使第一电压转换电路31,与第一开关K1和/或第二开关K2相连,可通过一个或两个开关的通断,控制第一电池1与第一电压转换电路31相连,以使第一电压转换电路31可对第一电池1的输入电压或输出电压进行转换。
相应地,响应于第二电池2的两端分别与第三开关K3和第二开关K2相连,可使第二电压转换电路32,与第三开关K3和/或第二开关K2相连,可通过一个或两个开关的通断,控制第二电池2与第二电压转换电路32相连,以使第二电压转换电路32可对第二电池2的输入电压或输出电压进行转换。
在一实施例中,电池总成10还包括第一电容C1;第一电容C1的两端,与第一电压转换电路31和/或第二电压转换电路32相连。
在一实施例中,电池总成10还包括第一电容C1,该第一电容C1可以为与充电接口OUT1或供电接口OUT2并联的电容,第一电容C1的两端,与第一电压转换电路31的第一端和第二端相连,和/或第二电压转换电路32的第一端和第二端相连。
作为一示例,第一电压转换电路31,不仅可通过开关电路K0(如第一开关K1和/或第二开关K2)与第一电池1相连,还与第一电容C1相连,响应于开关电路K0导通,可使第一电池1、第一电压转换电路31和第一电容C1之间配合,形成第一电池1对应的第一自加热回路。
其中,第一自加热回路是指单一电池进行自加热的回路。第二自加热回路为两个电池相互加热的回路。
第一电池1对应的第一自加热回路是指第一电池1利用第一电压转换电路31以及第一电容C1配合,完成对第一电池1进行自加热过程的回路。
如图2所示,响应于第一电池1为EV电池,EV电池对应的第一自加热回路的工作过程如下:(1)控制EV电池中的第一开关K1和第二开关K2导通、下桥功率管T2导通,上桥功率管T1断开,EV电池给第一电感L1充电,并通过与上桥功率管T1并联的二极管给第一电容C1充电;(2)控制EV电池中的下桥功率管T2断开,上桥功率管T1导通,利用第一电容C1和第一电感L1,给EV电池充电,以使EV电池可完成自加热操作。
同理,第二电压转换电路32不仅可通过开关电路K0(如第三开关K3和/或第二开关K2)与第二电池2相连,还与第一电容C1相连,响应于开关电路K0导通,使得第二电池2、第二电压转换电路32和第一电容C1之间配合,形成第二电池2对应的自加热回路,其工作过程同上,此处不一一赘述。
作为一示例,第一电压转换电路31,通过第一开关K1和/或第二开关K2,连接第一电池1和第一电容C1;第二电压转换电路32,通过第三开关K3和/或第二开关K2,连接第二电池2和第一电容C1;响应于开关均导通,第一电池1、第一电压转换电路31、第二电池2、第二电压转换电路32和第一电容C1之间,配合形成两个电池对应的第二自加热回路。
作为一示例,第一电池1、第一电压转换电路31、第二电池2、第二电压转换电路32和第一电容C1配合,形成第二自加热回路,响应于第二自加热回路导通,对第一电池1和第二电池2进行自加热。
如图2所示,在第一电池1为EV电池,而响应于第二电池2为HEV电池,EV电池给HEV电池充电过程如下:
(1)控制控制EV电池中的第一开关K1和第二开关K2导通、下桥功率管T2导通,EV电池给第一电感L1充电;控制EV电池中的下桥功率管T2断开,EV电池和第一电感L1,通过与上桥功率管T1并联的二极管给第一电容C1充电,在第一电容C1充满电后,下桥功率管T2断开。
(2)再控制HEV电池中的第三开关K3和第二开关K2导通,控制HEV电池中的上桥功率管T1导通,利用充满电的第一电容C1给HEV电池中的第一电感L1和HEV电池充电;接着,控制HEV电池中的上桥功率管T1断开,下桥功率管T2导通,利用储能后的第一电感L1持续放电给HEV电池充电,如此过程,完成EV电池给HEV电池充电过程。反过来,也可以控制HEV电池给EV电池充电,其开关闭合顺序与上述顺序相反,如此反复,可完成上述两个电池相互充放电过程,以实现两个电池相互加热过程。
作为一示例,电池总成10还包括与第一电容C1并联设置的被动泄放电阻R3,在整车下电后,需控制开关电路K0断开,第一电容C1需要放电,因此,需要通过被动泄放电阻R3配合第一电容C1完成放电过程。
在一实施例中,开关电路K0还包括第一预充开关组件KR1和/或第二预充开关组件KR2;第一预充开关组件KR1,设置在第一电池1和第一电容C1之间;第二预充开关组件KR2,设置在第二电池2和第一电容C1之间。
作为一示例,开关电路K0还包括第一预充开关组件KR1和/或第二预充开关组件KR2,即可仅设有一个预充开关组件,也可以设置两个预充开关组件。第一预充开关组件KR1,设置在第一电池1和第一电容C1之间,具体包括串联设置的第一预充电阻R01和第一预充开关K01,被配置为在第一电池1预充时导通,以避免充电瞬间产生的大电流损坏电池。
相应地,第二预充开关组件KR2,设置在第二电池2和第一电容C1之间,具体包括串联设置的第二预充电阻R02和第二预充开关K02,被配置为在第二电池2预充时导通,以避免充电瞬间产生的大电流损坏电池。
本示例中,第一预充开关组件KR1可与设置在第一电池1与第一电容C1之间的任一开关并联设置,例如,可与第一开关K1并联设置,在需要对第一电池1进行充电时,先控制第一预充开关组件KR1导通,给第一电容C1进行预充
作为一示例,电池总成10还包括与第一电容C1并联设置的被动泄放电阻R1,在整车下电后,需控制开关电路K0断开,此时,第一电容C1需要放电,因此,需要通过被动泄放电阻R1配合第一电容C1完成放电过程。
开关电路K0还包括第四开关K4和/或第五开关K5;第四开关K4的第一端,与第一电压转换电路31和第一电池1之间的连接节点相连,第四开关K4的第二端被配置为连接供电接口OUT2或者交流充电接口;第五开关K5的第一端,与第二电压转换电路32和第二电池2之间的连接节点相连,第五开关K5的第二端被配置为连接供电接口OUT2或者交流充电接口。
在一实施例中,开关电路K0还包括第四开关K4,第四开关K4的第一端,与第一电压转换电路31和第一电池1之间的连接节点相连,第四开关K4的第二端被配置为连接供电接口OUT2。
本示例中,第四开关K4的第一端与第一电压转换电路31和第一电池1之间的连接节点相连,具体可与第一电池1直接相连,也可以通过设置在两者之间的开关(如第一开关K1)与第一电池1相连。在第四开关K4导通时,可使第一电池1与供电接口OUT2对应的用电设备之间形成直连放电回路。在第四开关K4断开时,可使第一电池1通过第一电压转换电路31与供电接口OUT2对应的用电设备之间形成升压放电回路,采用第一电压转换电路31对第一电池1的输出电压进行电压转换后,给用电负载4供电。
其中,直连放电回路是指电池可直接给用电负载4供电,其过程无需进行电压转换的回路。升压放电回路是指电池给用电负载4供电过程中需要进行升压转换的回路。
本示例中,在第一电池1的输出电压大于负载4的需求供电电压时,可认定第一电池1可给负载4提供满足其正常工作的需求供电电压,此时,可控制第一电池1对应的直连放电回路导通,利用第一电池1的输出电压直接给负载4供电,以保障负载4的正常工作。
反之,在第一电池1的输出电压不大于负载4的需求供电电压时,可认定第一电池1无法给负载4提供满足其正常工作的需求供电电压,此时,可控制第一电池1对应的升压放电回路导通,具体控制第一开关K1导通,并控制第一电压转换电路31对第一电池1的输出电压进行升压转换,使得升压转换后的电压与负载4的需求供电电压相匹配,以利用升压转换后的电压给负载4供电,保障负载4的正常工作。
在一实施例中,开关电路K0还包括第五开关K5,第五开关K5的第一端,与第二电压转换电路32和第二电池2之间的连接节点相连,第五开关K5的第二端被配置为连接供电接口OUT2。
本示例中,第五开关K5的第一端与第二电压转换电路32和第二电池2之间的连接节点相连,具体可与第二电池2直接相连,也可以通过设置在两者之间的开关(如第三开关K3)与第二电池2相连。在第五开关K5导通时,可使第二电池2与供电接口OUT2对应的用电设备之间形成直连放电回路。在第五开关K5断开时,可使第二电池2通过第二电压转换电路32与供电接口OUT2对应的用电设备之间形成升压放电回路,采用第二电压转换电路32对第二电池2的输出电压进行电压转换后,给用电负载4供电。
本示例中,在第二电池2的输出电压大于负载4的需求供电电压时,可认定第二电池2可给负载4提供满足其正常工作的需求供电电压,此时,可控制第二电池2对应的直连放电回路导通,利用第二电池2的输出电压直接给负载4供电,以保障负载4的正常工作。
反之,在第二电池2的输出电压不大于负载4的需求供电电压时,可认定第二电池2无法给负载4提供满足其正常工作的需求供电电压,此时,可控制第二电池2对应的升压放电回路导通,具体控制第三开关K3导通,并控制第二电压转换电路32对第二电池2的输出电压进行升压转换,使得升压转换后的电压与负载4的需求供电电压相匹配,以利用升压转换后的电压给负载4供电,保障负载4的正常工作。
本示例中,在电池总成10适用在汽车上,且车辆处于放电工况时,其具体控制逻辑如下:
(1)获取负载4对应的需求供电电压和目标电池对应的输出电压,此处的目标电池可以为接入两个母线之间的至少一个电池;
(2)若目标电池对应的输出电压大于负载4对应的需求供电电压,可认定目标电池可给负载4提供满足其正常工作的需求供电电压,此时,可控制目标电池对应的直连放电回路导通,以利用目标电池对应的输出电压对负载4供电;
(3)若目标电池对应的输出电压不大于负载4对应的需求供电电压,可认定目标电池无法给负载4提供满足其正常工作的需求供电电压,此时,可控制目标电池对应的升压放电回路导通,对目标电池对应的输出电压进行升压转换,利用升压转换后的电压给负载4供电,以保障目标电池提供满足其正常工作的需求供电电压,进而保障负载4的正常工作。
本示例中,在第一电池1和第二电池2中的至少一个与负载4形成直连放电回路时,在任一个电池的输出电压大于负载4的需求供电电压时,可理解为该电池的输出电压满足负载4的需求,无需进行电压转换,可直接控制相应的电池给负载4供电,控制过程简单方便。
在两个电池的输出电压均不大于负载4的需求供电电压时,可控制第一电压转换电路31和/或第二电压转换电路32对其对应的输出电压进行升压转换,使得升压转换后的电压与负载4的需求供电电压相匹配,以利用升压转换后的电压给负载4供电,保障负载4的正常工作。
作为一示例,如图2和图3所示,第一电池1可以通过第四开关K4与交流充电接口OUT1相连,形成第一电池1对应的直连交流充电回路,被配置为控制与交流充电接口OUT1相连的交流电源5给第一电池1充电。
本示例中,在电池总成10应用在汽车上,且目标工况为交流充电工况时,可控制第一电池1对应的直连交流充电回路导通,以利用汽车上的交流电源5给第一电池1充电。
作为一示例,如图2和图3所示,第二电池2可以通过第五开关K5与交流充电接口OUT1相连,形成第二电池2对应的直连交流充电回路,在目标工况为交流充电工况时导通,控制与交流充电接口OUT1相连的交流电源5给第二电池2充电。本示例中,在电池总成10应用在汽车上,且目标工况为交流充电工况时,可控制第二电池2对应的直连交流充电回路导通,以利用汽车上的交流电源5给第二电池2充电。
在一实施例中,开关电路K0还包括第六开关K6和/或第七开关K7;第六开关K6的第一端,与第一电压转换电路31和第一电池1之间的连接节点相连,第六开关K6的第二端被配置为连接直流充电接口OUT1;第七开关K7的第一端,与第二电压转换电路32和第二电池2之间的连接节点相连,第七开关K7的第二端被配置为连接直流充电接口OUT1。
在一实施例中,如图2所示,电池总成10还包括第六开关K6,第六开关K6的第一端,与第一电压转换电路31和第一电池1之间的连接节点相连,第六开关K6的第二端被配置为连接直流充电接口OUT1。
本示例中,第六开关K6的第一端与第一电压转换电路31和第一电池1之间的连接节点相连,既可设置在第一电池1与第一开关K1之间,也可以设置在第一开关K1与第一电压转换电路31之间。
在第一电池1和第一电压转换电路31之间的开关电路K0(第一开关K1/或第二开关K2)导通,而第六开关K6断开时,第一电池1通过第一电压转换电路31与直流充电接口相连,形成第一电池1对应的降压直流充电回路,被配置为对直流充电接口的供电电压进行降压转换,利用降压转换后的电压给第一电池1充电,使得降压转换后的电压给第一电池1充电,以保障直流电源6给第一电池1的输入电压与其需求充电电压相匹配,避免过充;在第一电池1和第一电压转换电路31之间的开关电路K0(第一开关K1/或第二开关K2)导通,且第六开关K6导通时,直流充电接口、第六开关K6、第一电压转换电路31和第一电池1之间,形成第一电池1对应的升压直流充电回路,被配置为对直流充电接口OUT1的供电电压进行升压转换,利用升压转换后的电压给第一电池1充电,以提升第一电池1的充电速率。
在一实施例中,如图2所示,电池总成10还包括第七开关K7,第七开关K7的第一端,与第二电压转换电路32和第二电池2之间的连接节点相连,第七开关K7的第二端被配置为连接充电接口OUT1。
本示例中,第七开关K7的第一端与第二电压转换电路32和第二电池2之间的连接节点相连,即其既可设置在第二电池2和第三开关K3之间,也可设置在第三开关K3与第二电压转换电路32之间。本示例中,在第二电池2和第二电压转换电路32之间的开关电路K0(第三开关K3和/或第二开关K2)导通,且第七开关K7断开时,第二电池2通过第二电压转换电路32与直流充电接口相连,形成第二电池2对应的降压直流充电回路,被配置为对直流充电接口OUT1的供电电压进行降压转换,利用降压转换后的电压给第二电池2充电,以保障直流电源6给第二电池2的输入电压与其需求充电电压相匹配,避免过充。
在第二电池2和第二电压转换电路32之间的开关电路K0(第三开关K3和/或第二开关K2)导通,且第七开关K7导通时,第二电池2还通过第七开关K7K8与第二电压转换电路32与直流充电接口相连,形成第二电池2对应的升压直流充电回路,在第二电池2对应的升压直流充电回路导通时,控制第二电压转换电路32对直流充电接口的供电电压进行升压转换,利用升压转换后的电压给第二电池2充电。
本示例中,第一电池1和第二电池2均通过其对应的开关组件与对应的电压转换电路配合形成降压直流充电回路,并分别通过第六开关K6和第七开关K7,与对应的电压转换电路配合形成升压直流充电回路,可通过比较直流充电接口的供电电压与两个电池的需求充电电压,在其供电电压均大于两个电池的需求充电电压时,可控制两个降压直流充电回路进行降压转换;在其供电电压介于两个电池的需求充电电压之间时,可控制一个进行升压转换,另一个进行降压转换;在其供电电压均小于或等于两个电池的需求充电电压时,尤其是两者的差值较大时,影响充电速率时,可控制两个升压直流充电回路进行升压转换,以保障充电速率。
作为一示例,在电池总成10仅包括第二电压转换电路32时,需求充电电压较大的第一电池1,通过与其两端相连的第一开关K1和/或第二开关K2,与直流充电接口相连,形成第一电池1对应的直连直流充电回路;而需求充电电压较小的第二电池2,通过与其两端相连的第三开关K3和/或第二开关K2,以及第二电压转换电路32与直流充电接口相连。
例如,在第一电池1和第二电池2分别为EV电池和HEV电池时,由于EV电池的需求充电电压大于HEV电池的需求充电电压,可将EV电池确定为第一电池,而HEV电池确定为第二电池。
作为一示例,在需求充电电压较大的第一电池1通过第一开关K1和/第二开关K2,与直流充电接口相连,形成第一电池1对应的直连直流充电回路时,可在直流充电接口的供电电压与第一电池1的需求充电电压相匹配时,即供电电压小于或等于第一电池的需求充电电压时,可控制第一电池的直连直流充电回路导通,以使直流电源6可直接给第一电池充电。
此时,将需求充电电压较小的第二电池2通过第二电压转换电路32与直流充电接口相连,形成第二电池2对应的降压直流充电回路,在直流充电接口的供电电压与第二电池的需求充电电压不匹配时,即供电电压大于第二电池2的需求充电电压时,可控制第二电池2的降压直流充电回路导通,以使该电压转换电路可对直流充电接口输出的供电电压进行降压转换,利用需要降压后才给第二电池2充电,可保障直流充电的正常进行。
作为一示例,如图2所示,直流电源6给第一电池1(EV电池)进行降压充电过程如下:
(1)控制第八开关K8和第九开关K9闭合,控制第一开关K1和第二开关K2导通,直流电源6通过直流充电接口输出电流,控制上桥功率管T1导通,而下桥功率管T2断开,电流流经上桥功率管T1和第一电感L1流入第一电池1的两端,此时,直流电源6对第一电感L1和第一电池1充电。
(2)接着,控制上桥功率管T1断开,而下桥功率管T2导通,由于电感电流不能突变,因此,第一电感L1的电流维持,电能输出,电流依次流经第一电感L1、第一开关K1、EV电池、第二开关K2、下桥功率管T2,以利用第一电感L1,给第一电池1(EV电池)充电。根据电感的伏秒定理,充电过程中电池两端的输入电压小于直流充电接口的供电电压时,通过调整上桥功率管T1和下桥功率管T2的开关频率,从而调整电池两端的输入电压,以达到降压充电效果。
作为一示例,如图2所示,第一电池1(EV电池)对应的升压直流充电回路中,第一电池1的两端,分别与第一电压转换电路31的第三端和第二端相连。在升压直流充电回路进行升压时,直流充电接口输出的电流依次经过第一电压转换电路31的第一电感L1和下桥功率管T2,直流电源6对第一电感L1充电,然后电流再依次经过第一电感L1和第四开关K4接入第一电池1的两端,以对直流充电接口的供电电压进行升压转换,利用升压后的电压对电池进行直流充电。
作为一示例,如图4所示,本申请还提供了一种充放电系统100,包括电池总成10、充电接口OUT1和供电接口OUT2;充电接口OUT1被配置为连接充电电源;供电接口OUT2被配置为连接负载4。
其中,充电接口OUT1是被配置为连接充电电源的接口。负载4是被配置为连接需要用电的负载4,是汽车上除了需要通过驱动模块7相连的电机8以外的其他负载4,包括但车载仪表和空调压缩机等。驱动模块7是被配置为驱动电机8工作的模块。
本实施例中,充放电系统100包括电池总成10,可通过开关电路K0将第一电池1和第二电池2中的至少一个接入电路,以使其可通过充电接口OUT1与充电电源相连,对至少一个电池进行充电,并给负载4供电;在两个母线之间还设有双向电压转换电路3,既可进行升压转换又可进行降压转换,以实现对接入两个母线的电池的输入电压和输出电压进行转换,以使满足供电需求或者充电需求。
在一实施例中,充电接口OUT1包括交流充电接口和直流充电接口中的至少一个,交流充电接口被配置为连接交流电源5,直流充电接口被配置为连接直流电源6。
其中,交流充电接口是被配置为连接交流电源5的接口。直流充电接口是被配置为连接直流电源6(包括但直流充电桩等)的接口。负载4是被配置为连接需要用电的负载4,是汽车上除了需要通过驱动模块7相连的电机8以外的其他负载4。
作为一示例,本申请还提供了一种充放电控制方法,适用于充放电系统100中,充放电控制方法包括:基于目标工况,控制开关电路K0的通断,以实现目标电池的连通,控制目标电池进行充放电;及目标电池为第一电池1和/或第二电池2。
作为一示例,控制器可接收第一车辆数据,基于第一车辆数据,确定目标工况。
本示例中,响应于第一车辆数据为车辆行驶状态,可确定其目标工况为放电工况。响应于第一车辆数据为与充电电源相连,确定其目标工况为充电工况,例如,在第一车辆数据为插入直流充电枪等直流电源6,可确定其目标工况为直流充电工况;在第一车辆数据为车载电源等交流电源5给电池充电,可确定其目标工况为交流充电工况。
其中,第一车辆数据为当前时刻采集到的被配置为确定车辆工况的数据。
作为一示例,控制器在确定目标工况后,可基于目标工况,控制开关电路K0的通断,以将第一电池1和/或第二电池2确定为目标电池,将目标电池对应的充放电回路导通,以使目标电池进行充放电。
例如,响应于目标工况为放电工况,可控制目标电池对应的放电回路导通;响应于目标工况为充电工况,可控制目标电池对应的充电回路导通。
由于充放电系统100的电池总成10中,可通过开关电路K0将串联设置的第一电池1和第二电池2中的至少一个,连接充电接口OUT1或供电接口OUT2,以使其可通过充电接口OUT1对至少一个电池进行充电,或者,通过供电接口OUT2给负载4或电机8供电,可在用电需求较低时,控制其中一个电池接入电路,在用电需求较高的情况下,控制两个电池接入电路,以提升续航里程,满足不同工况的具体需求。并且,两个电池的电量一般不相同,即可以满足体积小且成本低的要求,又能够在需求功率不足时进行功率补充。
在一实施例中,基于目标工况,控制开关电路K0的通断,以实现目标电池的连通,控制目标电池进行充放电,包括:响应于目标工况为放电工况,控制开关电路K0的通断,以使目标电池对应的放电回路导通,给负载4供电。
作为一示例,控制器在目标工况为放电工况时,可根据实际情况,控制开关电路K0的通断,以使目标电池对应的放电回路导通,以使目标电池给负载4供电,给负载4供电。此处的目标电池可以为第一电池1,也可以为第二电池2,还可以为串联设置的第一电池1和第二电池2,放电回路可以为上述实施例中的直连放电回路或者升压放电回路,具体根据目标电池的输出电压和需求供电电压确定。
其中,直连放电回路是指电池可直接给负载4或电机8供电,其过程无需进行电压转换的回路。升压放电回路是指电池给负载4或电机8供电过程中需要进行升压转换的回路。
在一实施例中,响应于目标工况为放电工况,控制开关电路K0的通断,以使目标电池对应的放电回路导通,给负载4供电,包括:
响应于目标工况为放电工况,获取负载4的需求供电电压;
响应于目标电池的输出电压大于需求供电电压,将输出电压大于需求供电电压的电池,确定为目标电池,控制开关电路K0的通断,以使目标电池对应的直连放电回路导通,利用目标电池的输出电压给负载4供电;及
目标电池的输出电压不大于需求供电电压,将与双向电压转换电路3相连的电池,确定为目标电池,控制开关电路K0的通断,以使目标电池对应的升压放电回路导通,对目标电池的输出电压进行升压转换,利用升压转换后的电压给负载4供电。
作为一示例,步骤S11中,控制器在目标工况为放电工况时,需获取负载4的需求供电电压,并将该需求供电电压与第一电池1的输出电压和第二电池2的输出电压进行比较。
作为一示例,步骤S12中,控制器在目标电池的输出电压大于需求供电电压时,即第一电池1的输出电压大于需求供电电压,或者第二电池2的输出电压大于需求供电电压,或者第一电池1和第二电池2串联后的输出电压大于需求供电电压,认定第一电池1和/或第二电池2可给负载4提供满足其正常工作的需求供电电压,则将输出电压大于需求供电电压的电池确定为目标电池,例如,响应于第一电池1的输出电压大于负载4的需求供电电压,可将第一电池1确定为目标电池,控制开关电路K0的通断,以使目标电池对应的直连放电回路导通,利用目标电池的输出电压给负载4供电,控制过程简单。此处的直连放电回路是指电池的两端直接与负载4相连,电池的输出电压可直接给负载4供电的回路。
作为一示例,控制器在目标电池的输出电压不大于需求供电电压,认定第一电池1和/或第二电池2均无法给负载4提供满足其正常工作的需求供电电压,此时,可将与双向电压转换电路3相连的电池确定为目标电池,控制开关电路K0的通断,以使目标电池对应的升压放电回路导通,对目标电池的输出电压进行升压转换,利用升压转换后的电压给负载4供电,有助于保障负载4的正常工作。此处的升压放电回路是指电池的两端通过双向电压转换电路3与负载4相连的回路,具体是指电池的两端分别与双向电压转换电路3的第三端和第二端相连,而双向电压转换电路3的第一端和第二端与负载4相连的回路,利用双向电压转换电路3进行升压转换。
在一实施例中,基于目标工况,控制开关电路K0的通断,以实现目标电池的连通,控制目标电池进行充放电,包括:
响应于目标工况为直流充电工况,控制开关电路K0的通断,以使目标电池对应的直流充电回路导通,以使直流电源6对目标电池充电;及
响应于目标工况为交流充电工况,控制开关电路K0的通断,以使目标电池对应的交流充电回路导通,以使交流电源5对目标电池充电。
作为一示例,控制器在目标工况为直流充电工况,则控制开关电路K0的通断,以使目标电池对应的直流充电回路导通,使直流充电回路中的目标元件工作,以使直流电源6对目标电池充电。
直流充电回路根据具体电路设计,可以为直连直流充电回路、升压直流充电回路和降压直流充电回路中的任一种;响应于同一电池设有任意两种直流充电回路,可根据直流充电接口OUT152的供电电压和电池的需求充电电压的比较结果,将第一电池1和/或第二电池2确定为目标电池,并控制目标电池对应的直流充电回路导通,以使直流电源6对目标电池充电。
作为一示例,控制器在目标工况为交流充电工况时,控制开关电路K0的通断,以使目标电池对应的交流充电回路导通,以使交流电源5对目标电池充电。由于交流电源5一般为汽车上的车载电源,其两端与负载4直接相连,因此,可直接控制交流电源5与负载4之间的交流充电回路导通,例如,可车载电源,对目标电池进行交流充电。
在一实施例中,即响应于目标工况为直流充电工况,控制开关电路K0的通断,以使目标电池对应的直流充电回路导通,以使直流电源6对目标电池充电,包括:
响应于目标工况为直流充电工况,获取直流电源6的供电电压范围和目标电池的需求充电电压;
响应于需求充电电压在供电电压范围内,控制开关电路K0的通断,以使目标电池对应的直连直流充电回路导通;
响应于需求充电电压大于供电电压范围,控制开关电路K0的通断,以使目标电池对应的升压直流充电回路导通;及
响应于需求充电电源小于供电电压范围,控制开关电路K0的通断,以使目标电池对应的降压直流充电回路导通。
供电电压范围是指直流电源6所能提供的供电电压的下限值与上限值所形成的范围,是直流电源6能够提供的电压范围。需求充电电压是指目标电池所需的充电电压。
作为一示例,控制器在目标工况为直流充电工况时,即就是说,直流电源6(如充电枪)插入汽车时,其充放电系统100接入到充电桩插入信号时,可与充电桩进行交互,确定直流电源6的供电电压范围,并根据该供电电压范围与其目标电池的需求充电电压进行比较,以确定采用不同的充电策略进行充电。
作为一示例,控制器在目标电池的需求充电电压在直流电源6对应的供电电压范围时,认定直流电源6可给目标电池提供满足其需求的电压,此时,可控制目标电池对应的直连直流充电回路导通,以实现对目标电池进行直连直流充电。此处的直连直流充电回路是指直流电源6直接给目标电池充电的回路,即目标电池与充电接口OUT1直接相连的回路。
作为一示例,控制器在目标电池的需求充电电压大于直流电源6对应的供电电压范围时,可认定直流电源6的供电电压的上限值小于目标电池的需求充电电压,此时,需要控制目标电池对应的升压直流充电回路导通,通过双向电压转换电路3对直流电源6的输出电压进行升压转换,以使升压转换后的电压,与目标电池的需求充电电压一致,以提高充电效率。
本示例中,目标电池对应的升压直流充电回路是指目标电池的两端,分别双向电压转换电路3的第一端和第二端相连;而直流电源6的两端,分别与双向电压转换电路3的第三端和第二端相连所形成的回路,其具体控制过程如下:
(1)先控制直流电源6的正极输出的电流依次经过第一电感L1和下桥功率管T2回流至直流电源6的负极,以使直流电源6给第一电感L1充电;
(2)再控制直流电源6的正极输出的电流依次经过第一电感L1和目标电池,回流至直流电源6的负极,以利用直流电源6和第一电感L1对目标电池进行充电,以实现升压充电目的。
作为一示例,控制器在目标电池的需求充电电压小于直流电源6对应的供电电压范围时,即直流电源6的供电电压的下限值大于目标电池的需求充电电压,此时,需要控制目标电池对应的降压直流充电回路导通,控制双向电压转换电路3对直流电源6的输出电压进行降压转换,以使降压转换后的电压,与目标电池的需求充电电压一致,以避免充电电压过大,对目标电池造成损伤。
本示例中,目标电池对应的降压直流充电回路是指目标电池的第一端,与双向电压转换电路3的第一端和第三端相连;目标电池的第二端与双向电压转换电路3的第二端相连;直流电源6的两端,分别与双向电压转换电路3的第一端和第二端相连的回路,其进行降压充电过程如下:
(1)先控制上桥功率管T1导通,而下桥功率管T2断开;直流电源6的正极输出的电流、依次经过上桥功率管T1、第一电感L1、目标电池,回流至直流电源6的负极,此时,直流电源6对第一电感L1和目标电池充电。
(2)接着,控制上桥功率管T1断开,而下桥功率管T2导通,由于电感电流不能突变,因此,第一电感L1的电流维持,电能输出,第一电感L1、目标电池和下桥功率管T1之间形成回路,利用第一电感L1给目标电池充电。
根据电感的伏秒定理,充电过程中电池两端的输入电压小于直流充电接口OUT1的供电电压时,通过调整上桥功率管T1和下桥功率管T2,从而调整电池两端的输入电压,以达到降压充电效果。
本示例中,利用第一电感L1电流不突变的特定,在充电过程中,通过调整上桥功率管T1和下桥功率管T2的开关频率,可使目标电池两端的充电电压小于直流电源6的输出电压,以达到降压充电效果。
本实施例中,可根据直流电源6对应的供电电压范围和目标电池的需求充电电压的比较结果,控制目标电池对应的不同充电回路导通,以适应不同直流电源6的具体情况,满足不同需求。
本申请实施例提供一种自加热方法,适用在上述实施例中的动力电池中,包括:
获取两个电池对应的当前电池数据;及
基于两个电池对应的当前电池数据,确定待加热电池,控制开关电路K0的通断,以使待加热电池对应的自加热回路导通,对待加热电池进行自加热。
作为一示例,控制器在确定目标工况之前,还需获取两个电池的当前电池数据,以便基于该当前电池数据评估电池是否处于低温工况。其中,当前电池数据是指当前时刻检索到的电池数据。
作为一示例,控制器在根据两个电池对应的当前电池数据,评估确定至少一个电池处于低温工况,则将该处于低温工况的电池确定为待加热电池,例如,在第一电池1处于低温工况,则将第一电池1确定为待加热电池,控制待加热电池对应的自加热回路导通,以使待加热电池进行自加热操作,从而提高待加热电池的温度,以保障电池的正常工作。
本示例中,在第一电池1和第二电池2中的至少一个确定为待加热电池,通过开关电路K0将待加热电池与双向电压转换电路3的第三端和第二端相连,而双向电压转换电路3的第三端和第二端,分别与第一电容C1的两端相连,形成待加热电池对应的自加热回路,在该自加热回路导通时,对自加热回路中的电池进行自加热。
例如,在待加热电池为第一电池1,其第一电池1对应的第一自加热回路的自加热过程如下:先控制第一电池1接入电路,再控制双向电压转换电路3中的下桥功率管T2导通,上桥功率管T1断开,使得第一电池1给第一电感L1充电,并通过与上桥功率管T1并联的二极管给第一电容C1充电;然后,控制下桥功率管T2断开,上桥功率管T1导通,利用第一电容C1和第一电感L1,给第一电池1充电,以完成该待加热电池的自加热过程。
又例如,在待加热电池包括串联的第一电池1和第二电池2,其自加热过程如下:先控制开关电路K0导通,使得第一电池1和第二电池2串联接入电路中,再控制双向电压转换电路3中的下桥功率管T2导通,上桥功率管T1断开,使得第一电池1给第一电感L1充电,并通过与上桥功率管T1并联的二极管给第一电容C1和第二电池2充电;然后,控制下桥功率管T2断开,上桥功率管T1导通,利用第一电容C1和第二电池2,给第一电池1充电,以完成待加热电池的自加热过程。
在一实施例中,基于两个电池对应的当前电池数据,确定待加热电池,包括:
响应于两个电池中,存在一个电池对应的当前电池数据满足其对应的低温工况条件,将电池,确定为待加热电池;及
响应于两个电池对应的当前电池数据满足其对应的低温工况条件,将两个电池确定为待加热电池。
作为一示例,控制器在获取两个电池对应的当前电池数据后,将该电池对应的当前电池数据与其对应的低温工况条件进行比较。若两个电池中,存在一个电池的当前电池数据满足其对应的低温工况条件,认定该电池为处于低温工况的待加热电池,由于其温度较低,可能会影响正常工作,因此,可控制该待加热电池对应的自加热回路导通,对单一电池进行自加热。
例如,在第一电池1的当前电池数据满足其对应的低温工况条件,而第二电池2的当前电池数据不满足其对应的低温工况条件,则控制第一电池1对应的自加热回路对第一电池1进行自加热,此过程不受限于第二电池2是否需要加热,可实现对第一电池1进行单独自加热操作。
作为一示例,控制器在获取两个电池对应的当前电池数据后,将该电池对应的当前电池数据与其对应的低温工况条件进行比较;响应于两个当前电池数据均满足其对应的低温工况条件,认定第一电池1和第二电池2均处于低温工况,此时,可将第一电池1和第二电池2均确定为待加热电池,采用该待加热电池对应的自加热回路,对第一电池1和第二电池2进行自加热,两个电池相互加热效率更快,更有利于快速提升电池温度,以保障电池的正常工作。
在一实施例中,当前电池数据包括当前电池温度;低温工况条件为电池对应的当前电池温度小于其对应的低温温度阈值。
其中,当前电池温度为实时检测到的电池温度。低温温度阈值为预先设置的被配置为评估电池温度是否达到低温工况对应的温度阈值。
作为一示例,控制器在待加热电池的当前电池温度小于待加热电池对应的低温温度阈值时,可认定待加热电池处于低温状态,可能会影响其正常工作,此时,可控制待加热电池对应的自加热回路对待加热电池进行自加热,以避免待加热电池在低温工况下工作,影响其当前输出功率,甚至存在安全隐患。
在一实施例中,当前电池数据包括当前电池温度和当前输出功率;低温工况条件为电池对应的当前电池温度小于其对应的低温温度阈值,且电池对应的当前输出功率小于其对应的低温功率阈值。
其中,电池的当前输出功率为实时检测到电池工作过程的当前输出功率。低温功率阈值为预先设置的被配置为评估当前输出功率是否影响其正常工作对应的功率阈值。
作为一示例,控制器在待加热电池的当前电池温度小于待加热电池对应的低温温度阈值,且待加热电池的当前输出功率小于待加热电池对应的低温功率阈值时,认定待加热电池处于低温状态,且待加热电池的低温已经影响其功率输出,此时,可控制待加热电池对应的自加热回路对待加热电池进行自加热,以避免待加热电池在低温工况下工作,影响其当前输出功率,甚至存在安全隐患。
作为一示例,如图5所示,本申请还提供了一种驱动系统200,包括电池总成10、供电接口OUT2和驱动模块7;驱动模块7与供电接口OUT2相连,并被配置为连接电机8。
本实施例中,驱动系统200包括电池总成10,可通过开关电路K0将第一电池1和第二电池2中的至少一个接入电路,给驱动模块7供电,以使驱动模块7驱动电机8工作。本示例中,驱动模块7的数量可以为一个,也可以为多个,可根据实际情况自主设置。
可理解地,驱动系统200中,可控制第一电池1和第二电池2中的至少一个给驱动模块7供电,以使驱动模块7完成驱动控制操作。
在一实施例中,电池总成10包括至少一个第二桥臂;第二桥臂包括串联设置的第三功率管T3和第四功率管T4;至少一个第三功率管T3汇流,形成驱动模块7的第一端;至少一个第四功率管T4汇流,形成驱动模块7的第二端;驱动模块7的第一端和第二端,分别目标电池的两端相连,目标电池为第一电池1和/或第二电池2;每一第三功率管T3和第四功率管T4之间的连接节点,为第二桥臂的中点,被配置为连接电机8。
作为一示例,如图2和图3所示,驱动模块7包括至少一个第二桥臂,第二桥臂包括串联设置在第三功率管T3和第四功率管T4,至少一个第三功率管T3汇流,形成驱动模块7的第一端;至少一个第四功率管T4汇流,形成驱动模块7的第二端;驱动模块7的第一端和第二端,分别目标电池的两端相连,目标电池为第一电池1和/或第二电池2;第三功率管T3和第四功率管T4之间的连接节点,为第二桥臂的中点,被配置为连接电机8。
第三功率管T3和第四功率管T4中的任一个为上桥功率管,另一个为下桥功率管,被配置为连接目标电池的负极。上桥功率管与目标电池的正极相连,被配置为控制电机8正转和反转。下桥功率管与目标电池的负极相连,被配置为控制电机8的制动和停止。
本示例中,第一电池1和第二电池2中的至少一个给驱动模块7提供能量,以使驱动模块7驱动电机8工作。
作为一示例,本申请还提供了一种驱动控制方法,适用于驱动系统200中,驱动控制方法包括:
响应于车辆处于驱动工况,获取整车当前模式;及
基于整车当前模式,控制开关电路K0的通断,以实现目标电池的连通,控制驱动模块7驱动电机8工作;目标电池为第一电池1和/或第二电池2。
作为一示例,控制器可根据实际情况,确定车辆的整车当前模式,例如,该整车当前模式可以为纯电模式、混动模式、馈电模式和补能模式中的任一种。
作为一示例,控制器在车辆处于整车当前模式下,可将第一电池1和/或第二电池2确定为目标电池。
例如,可以将第一电池1确定为目标电池,也可以将第二电池2确定为目标电池,还可以将第一电池1和第二电池2同时确定为目标电池,控制开关电路K0的通断,以连通目标电池和驱动模块7,给驱动模块7供电,以驱动电机8工作供电,以保障电机8的正常工作。
由于驱动系统200的电池总成10中,将第一电池1和第二电池2中的至少一个确定为目标电池,采用开关电路K0控制目标电池与驱动模块7的连通,以实现根据具体情况,切换不同能量的目标电池给驱动模块7供电,以满足不同工况的需求。
而且,开关电路K0中可设置双向电压转换电路3,在整车当前模式下,可根据实际情况,控制双向电压转换电路3对电池的输出电压进行双向电压转换,即既可进行升压转换,也可进行降压转换,以保障给驱动电机8提供更符合需求的能量。
在一实施例中,即基于整车当前模式,控制开关电路K0的通断,以实现目标电池的连通,控制驱动模块7驱动电机8工作,包括:
响应于整车当前模式为馈电模式,将第一电池1和第二电池2中电量较小的电池,确定为目标电池,控制开关电路K0的通断,以实现目标电池的连通,控制驱动模块7驱动电机8工作;
响应于整车当前模式为纯电模式、混动模式和补能模式,且电机8的需求功率小于或等于两个电池的当前输出功率的较大值,将当前输出功率的较大值对应的电池确定为目标电池,控制开关电路K0的通断,以实现目标电池的连通,控制驱动模块7驱动电机8工作;及
响应于整车当前模式为纯电模式、混动模式和补能模式,且电机8的需求功率大于电池的当前输出功率的较大值,将第一电池1和第二电池2确定为目标电池,控制开关电路K0的通断,以实现目标电池的连通,控制驱动模块7驱动电机8工作。
作为一示例,控制器在整车当前模式为馈电模式时,将第一电池1和第二电池2中电量较小的电池,例如EV电池和HEV电池这两个电池中,电量较小的HEV电池确定为目标电池,控制开关电路K0的通断,控制开关电路K0的通断,以实现目标电池的连通,控制驱动模块7驱动电机8工作,以实现在馈电模式下,通过驱动模块7控制电量较小的电池驱动电机8工作。
作为一示例,控制器在整车当前模式不为馈电模式,而为纯电模式、混动模式和补能模式中的任一个,且电机8的需求功率小于或等于两个电池的当前输出功率的较大值时,认定这个当前输出功率较大的电机8可给电机8提供其所需求能量,因此,将当前输出功率的较大值对应的电池确定为目标电池。
例如,可将当前输出功率较大的EV电池单独确定为目标电池,控制开关电路K0的通断,以实现目标电池的连通,控制驱动模块7驱动电机8工作。
作为一示例,控制器在整车当前模式不为馈电模式,而为纯电模式、混动模式和补能模式中的任一个,且电机8的需求功率大于两个电池的当前输出功率的较大值时,单个电池所提供的能量无法满足电机8的功率需求,因此,需将第一电池1和第二电池2均确定为目标电池,控制开关电路K0的通断,以实现目标电池的连通,控制驱动模块7驱动电机8工作。
本示例中,响应于开关电路K0中设置有双向电压转换电路3,还可利用控制双向电压转换电路3对电池的输出电压进行双向电压转换,即既可进行升压转换,也可进行降压转换,以保障给驱动电机8提供更符合需求的能量。
例如,响应于当前输出功率较大的EV电池单独给电机8提供能量,车辆进入高速超车、零百加速、极限脱困、高速爬坡等极限工况,电机8的需求功率大于EV电池的当前输出功率,此时,需将EV电池和HEV电池串联接入两个母线中,以实现在功率不足时进行功率补充。
作为一示例,本申请还提供了一种控制器,包括存储器、处理器以及存储在存储器中并可在处理器上运行的计算机程序,处理器执行计算机程序时实现充放电控制方法,或者自加热方法、或者实现驱动控制方法。
作为一示例,本申请还提供了一种汽车,包括电池总成10、或者充放电系统100、或者驱动系统200和电机8。
作为一示例,本申请还提供了一种计算机可读存储介质,计算机可读存储介质存储有计算机程序,计算机程序被处理器执行时实现充放电控制方法、或者实施自加热方法、或者实施驱动控制方法。
以上实施例用以说明本申请的技术方案,而非对其限制;参照前述实施例对本申请进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围,均应包含在本申请的保护范围之内。
Claims (26)
- 一种电池总成(10),包括:开关电路(K0);第一电池(1),所述第一电池(1)通过所述开关电路(K0)连接充电接口OUT1或者供电接口(OUT2);第二电池(2),所述第二电池(2)的电量小于所述第一电池(1)的电量,或所述第二电池(2)的峰值放电倍率大于所述第一电池(1)的峰值放电倍率;及双向电压转换电路(3),所述双向电压转换电路(3)被配置为连接所述充电接口(OUT1)或者所述供电接口(OUT2);其中,所述第二电池(2),通过所述开关电路(K0),与所述双向电压转换电路(3)相连。
- 根据权利要求1所述的电池总成(10),其中,所述第一电池(1)的电量为所述第二电池(2)的电量的2-100倍,或所述第二电池(2)的峰值放电倍率为所述第一电池(1)的峰值放电倍率的2-50倍。
- 根据权利要求1-2中任一项所述的电池总成(10),其中,所述第一电池(1),还通过所述开关电路(K0)与所述双向电压转换电路(3)相连,所述双向电压转换电路(3)被配置为连接所述充电接口(OUT1)或者所述供电接口(OUT2)。
- 根据权利要求1-3中任一项所述的电池总成(10),其中,所述双向电压转换电路(3)包括第一电压转换电路(31)和第二电压转换电路(32),或者,所述双向电压转换电路(3)包括第二电压转换电路(32);所述第一电池(1),通过所述开关电路(K0)与所述第一电压转换电路(31)相连;及所述第二电池(2),通过所述开关电路(K0)与所述第二电压转换电路(32)相连。
- 根据权利要求4所述的电池总成(10),其中,所述开关电路(K0)包括第一开关(K1)、第二开关(K2)和第三开关(K3);所述第一电池(1)的第一端与所述第一开关(K1)的第一端相连,所述第二电池(2)的第一端与所述第三开关(K3)的第一端相连;所述第一电池(1)的第二端和所述第二电池(2)的第二端均与所述第二开关(K2)的第一端相连;所述第一电压转换电路(31),与所述第一开关(K1)的第二端和/或所述第二开关(K2)的第二端相连;及所述第二电压转换电路(32),与所述第三开关(K3)的第二端和/或所述第二开关(K2)的第二端相连。
- 根据权利要求4-5中任一项所述的电池总成(10),还包括第一电容(C1);所述第一电容(C1)的两端,与所述第一电压转换电路(31)和/或所述第二电压转换电路(32)相连。
- 根据权利要求4-6中任一项所述的电池总成(10),其中,所述开关电路(K0)还包括第一预充开关组件(KR1)和/或第二预充开关组件(KR2);所述第一预充开关组件(KR1),设置在所述第一电池(1)和所述第一电容(C1)之间;及所述第二预充开关组件(KR2),设置在所述第二电池(2)和所述第一电容(C1)之间。
- 根据权利要求4-7中任一项所述的电池总成(10),其中,所述开关电路(K0)还包括第四开关(K4)和/或第五开关(K5);所述第四开关(K4)的第一端,与所述第一电压转换电路(31)和所述第一电池(1)之间的连接节点相连,所述第四开关(K4)的第二端被配置为连接所述供电接口(OUT2)或者交流充电接口(OUT1);及所述第五开关(K5)的第一端,与所述第二电压转换电路(32)和所述第二电池(2)之间的连接节点相连,所述第五开关(K5)的第二端被配置为连接所述供电接口(OUT2)或者交流充电接口(OUT1)。
- 根据权利要求4-8中任一项所述的电池总成(10),其中,所述开关电路(K0)还包括第六开关(K6)和/或第七开关(K7);所述第六开关(K6)的第一端,与所述第一电压转换电路(31)和所述第一电池(1)之间的连接节点相连,所述第六开关(K6)的第二端被配置为连接直流充电接口(OUT1);及所述第七开关(K7)的第一端,与所述第二电压转换电路(32)和所述第二电池(2)之间的连接节点相连,所述第七开关(K7)的第二端被配置为连接所述直流充电接口(OUT1)。
- 一种充放电系统(100),包括权利要求1-9中任一项电池总成(10)、充电接口(OUT1)和供电接口(OUT2);所述充电接口(OUT1)被配置为连接充电电源;及所述供电接口(OUT2)被配置为连接负载(4)。
- 根据权利要求10所述的充放电系统(100),其中,所述充电接口(OUT1)包括交流充电接口和直流充电接口中的至少一个,所述交流充电接口用于连接交流电源,所述直流充电接口用于连接直流电源。
- 一种充放电控制方法,适用在权利要求10-11中任一项所述充放电系统(100)中,包括:基于目标工况,控制所述开关电路(K0)的通断,以实现目标电池的连通,控制目标电池进行充放电;所述目标电池为第一电池(1)和/或第二电池(2)。
- 根据权利要求12所述的充放电控制方法,其中,所述基于目标工况,控制所述开关电路(K0)的通断,以实现目标电池的连通,控制目标电池进行充放电,包括:响应于所述目标工况为放电工况,控制所述开关电路(K0)的通断,以使所述目标电池对应的放电回路导通,给所述负载(4)供电。
- 根据权利要求13所述的充放电控制方法,其中,所述响应于所述目标工况为放电工况,控制所述开关电路(K0)的通断,以使所述目标电池对应的放电回路导通,给所述负载(4)供电,包括:响应于所述目标工况为放电工况,获取所述负载(4)的需求供电电压;响应于所述目标电池的输出电压大于所述需求供电电压,将所述输出电压大于所述需求供电电压的电池,确定为目标电池,控制所述开关电路(K0)的通断,以使所述目标电池对应的直连放电回路导通,利用所述目标电池的输出电压给所述负载(4)供电;及响应于所述目标电池的输出电压不大于所述需求供电电压,将与所述双向电压转换电路(3)相连的电池,确定为目标电池,控制所述开关电路(K0)的通断,以使所述目标电池对应的升压放电回路导通,对所述目标电池的输出电压进行升压转换,利用升压转换后的电压给所述负载(4)供电。
- 根据权利要求12-14中任一项所述的充放电控制方法,其中,所述基于目标工况,控制所述开关电路(K0)的通断,以实现目标电池的连通,控制目标电池进行充放电,包括:响应于所述目标工况为直流充电工况,控制所述开关电路(K0)的通断,以使所述目标电池对应的直流充电回路导通,以使直流电源对所述目标电池充电;及响应于所述目标工况为交流充电工况,控制所述开关电路(K0)的通断,以使所述目标电池对应的交流充电回路导通,以使交流电源对所述目标电池充电。
- 根据权利要求15所述的充放电控制方法,其中,所述响应于所述目标工况为直流充电工况,控制所述开关电路(K0)的通断,以使所述目标电池对应的直流充电回路导通,以使直流电源对所述目标电池充电,包括:响应于目标工况为直流充电工况,获取直流电源的供电电压范围和目标电池的需求充电电压;响应于所述需求充电电压在所述供电电压范围内,控制所述开关电路(K0)的通断,以使所述目标电池对应的直连直流充电回路导通;响应于所述需求充电电压大于所述供电电压范围,控制所述开关电路(K0)的通断,以使所述目标电池对应的升压直流充电回路导通;及响应于所述需求充电电源小于所述供电电压范围,则控制所述开关电路(K0)的通断,以使所述目标电池对应的降压直流充电回路导通。
- 一种自加热方法,适用在权利要求1-9中任一项电池总成(10)中,包括:获取两个电池对应的当前电池数据;及基于两个电池对应的当前电池数据,确定待加热电池,控制所述开关电路(K0)的通断,以使所述待加热电池对应的自加热回路导通,对所述待加热电池进行自加热。
- 根据权利要求17所述的自加热方法,其中,所述基于两个电池对应的当前电池数据,确定待加热电池,包括:响应于两个所述电池中,存在一个电池对应的当前电池数据满足其对应的低温工况条件,将所述电池,确定为待加热电池;及响应于两个电池对应的当前电池数据满足其对应的低温工况条件,将两个电池确定为待加热电池。
- 根据权利要求18所述的自加热方法,其中,所述当前电池数据包括当前电池温度;所述低温工况条件为电池对应的当前电池温度小于其对应的低温温度阈值。
- 根据权利要求18-19中任一项所述的自加热方法,其中,所述当前电池数据包括当前电池温度和当前输出功率;所述低温工况条件为电池对应的当前电池温度小于其对应的低温温度阈值,且电池对应的当前输出功率小于其对应的低温功率阈值。
- 一种驱动系统(200),包括权利要求1-9中任一项所述电池总成(10)、供电接口(OUT2)和驱动模块(7);所述驱动模块(7)与所述供电接口(OUT2)相连,并被配置为连接电机(8)。
- 一种驱动控制方法,适用在权利要求21所述的驱动系统(200)中,包括:响应于车辆处于驱动工况,获取整车当前模式;及基于所述整车当前模式,控制所述开关电路(K0)的通断,以实现目标电池的连通,控制驱动模块(7)驱动电机工作;所述目标电池为第一电池(1)和/或第二电池(2)。
- 根据权利要求22所述的驱动控制方法,其中,所述基于所述整车当前模式,控制所述开关电路(K0)的通断,以实现目标电池的连通,控制驱动模块(7)驱动电机工作,包括:响应于所述整车当前模式为馈电模式,将所述第一电池(1)和所述第二电池(2)中电量较小的电池,确定为目标电池,控制所述开关电路(K0)的通断,以实现目标电池的连通,控制驱动模块(7)驱动电机工作;响应于所述整车当前模式为纯电模式、混动模式和补能模式,且电机的需求功率小于或等于两个电池的当前输出功率的较大值,将所述当前输出功率的较大值对应的电池确定为目标电池,控制所述开关电路(K0)的通断,以实现目标电池的连通,控制驱动模块(7)驱动电机工作;及响应于所述整车当前模式为纯电模式、混动模式和补能模式,且电机的需求功率大于电池的当前输出功率的较大值,将所述第一电池(1)和所述第二电池(2)确定为目标电池,控制所述开关电路(K0)的通断,以实现目标电池的连通,控制驱动模块(7)驱动电机工作。
- 一种控制器,包括存储器、处理器以及存储在所述存储器中并可在所述处理器上运行的计算机程序,所述处理器执行所述计算机程序时实现权利要求12-16中任一项所述充放电控制方法,或者实现权利要求17-20中任一项所述自加热方法,或者实现权利要求22-23中任一项所述驱动控制方法。
- 一种汽车,包括权利要求1-9中任一项所述的电池总成(10)、权利要求10-11中任一项所述的充放电系统(100)、或者权利要求21所述驱动系统(200)和电机。
- 一种计算机可读存储介质,所述计算机可读存储介质存储有计算机程序,所述计算机程序被处理器执行时实现权利要求12-16中任一项所述充放电控制方法,或者实现权利要求17-20中任一项所述自加热方法,或者实现权利要求22-23中任一项所述驱动控制方法。
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| CN121455028A (zh) * | 2025-11-18 | 2026-02-03 | 广州速博睿汽车科技有限公司 | 一种混动汽车的功率控制系统 |
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