Composite battery management control system, method and vehicle

Abstract

The present invention discloses a composite battery management control system, method and vehicle. The system includes: a temperature sensor for collecting the real-time temperature of a target battery group; wherein the target battery group includes a high-voltage lithium battery group and a low-voltage lithium battery group; a current sensor for collecting the charge and discharge current of the target battery group; a voltage acquisition line for collecting the cell voltage of each single cell in the target battery group; a battery management module for performing fault diagnosis on the target battery group according to the real-time temperature, charge and discharge current and single cell voltage of the target battery group, and generating a temperature management mechanism according to the fault diagnosis result, the real-time temperature and the single cell voltage, and realizing temperature control of the target battery group according to the temperature management mechanism. Through the technical solution of the present invention, the management and control of the composite battery can be realized, and the thermal management performance and safety of the composite battery are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, and in particular to a composite battery management control system, method and vehicle. Background Art

[0002] With the rapid development of the automobile industry, "energy conservation" and "emission reduction" have become the main themes of the development of the automobile industry. New energy vehicles or energy-saving vehicles represented by pure electric vehicles, plug-in hybrid vehicles and non-plug-in hybrid vehicles are receiving more and more attention and recognition.

[0003] Traditional pure electric and hybrid vehicles generally use discrete high-voltage power lithium batteries and discrete lead-acid batteries to form the vehicle power system. However, due to factors such as low mass energy density, low volume energy density and short cycle life of lead-acid batteries, they are increasingly unable to meet the needs of lightweight and low layout space for the entire vehicle. However, the conventional solution of using low-voltage lithium battery packs to replace lead-acid batteries cannot effectively manage the temperature of low-voltage lithium battery packs, and often causes problems of low-temperature or high-temperature overcurrent charging and discharging of batteries in low-temperature and high-temperature environments, affecting the safety of the lithium battery pack and the entire vehicle. Therefore, how to achieve management and control of composite batteries and improve the thermal management performance and safety of composite batteries is a problem that needs to be solved urgently. Summary of the invention

[0004] The present invention provides a composite battery management control system, method and vehicle, which can realize the management and control of the composite battery and improve the thermal management performance and safety of the composite battery.

[0005] According to one aspect of the present invention, a composite battery management control system is provided, comprising: a target battery pack, a temperature sensor, a current sensor, a voltage acquisition line, and a battery management module, wherein the target battery pack is respectively connected to the temperature sensor, the current sensor, and the voltage acquisition line, and the battery management module is respectively connected to the temperature sensor, the current sensor, and the voltage acquisition line;

[0006] A temperature sensor is used to collect the real-time temperature of a target battery pack; wherein the target battery pack includes a high-voltage lithium battery pack and a low-voltage lithium battery pack;

[0007] A current sensor for collecting the charge and discharge current of the target battery pack;

[0008] A voltage acquisition line is used to acquire the single cell voltage of each single cell in the target battery pack;

[0009] The battery management module is used to perform fault diagnosis on the target battery pack according to the real-time temperature, charge and discharge current and single cell voltage of the target battery pack, generate a temperature management mechanism based on the fault diagnosis results, real-time temperature and single cell voltage, and realize temperature control of the target battery pack according to the temperature management mechanism.

[0010] According to another aspect of the present invention, a composite battery management control method is provided, comprising:

[0011] Obtaining the real-time temperature, charge and discharge current, and cell voltage of each cell of the target battery pack; wherein the target battery pack includes a high-voltage lithium battery pack and a low-voltage lithium battery pack;

[0012] Perform fault diagnosis on the target battery pack according to the real-time temperature, charge and discharge current and single cell voltage of the target battery pack, and generate fault diagnosis results;

[0013] A temperature management mechanism is generated according to the fault diagnosis results, real-time temperature and single cell voltage, and the temperature of the target battery pack is controlled according to the temperature management mechanism.

[0014] According to another aspect of the present invention, a vehicle is provided, the vehicle comprising:

[0015] at least one processor; and

[0016] a memory communicatively connected to the at least one processor; wherein,

[0017] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the composite battery management control method described in any embodiment of the present invention.

[0018] The technical solution of the embodiment of the present invention is that the target battery group is respectively connected to the temperature sensor, the current sensor and the voltage acquisition line, and the battery management module is respectively connected to the temperature sensor, the current sensor and the voltage acquisition line; the temperature sensor is used to collect the real-time temperature of the target battery group; wherein the target battery group includes a high-voltage lithium battery group and a low-voltage lithium battery group; the current sensor is used to collect the charge and discharge current of the target battery group; the voltage acquisition line is used to collect the single cell voltage of each single cell in the target battery group; the battery management module is used to perform fault diagnosis on the target battery group according to the real-time temperature, charge and discharge current and single cell voltage of the target battery group, generate a temperature management mechanism according to the fault diagnosis result, the real-time temperature and the single cell voltage, and realize temperature control of the target battery group according to the temperature management mechanism, thereby realizing management and control of the composite battery and improving the thermal management performance and safety of the composite battery.

[0019] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is a structural schematic diagram of a composite battery management and control system provided according to Embodiment 1 of the present invention;

[0022] Figure 2 is a schematic structural diagram of an optional composite battery management and control system provided according to Embodiment 1 of the present invention;

[0023] Figure 3 This is a workflow diagram of a composite battery management control system provided according to Embodiment 1 of the present invention;

[0024] Figure 4 is a flow chart of a composite battery management control method provided according to Embodiment 2 of the present invention;

[0025] Figure 5 is a flow chart of an optional composite battery management control method provided according to Embodiment 2 of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of a vehicle that implements the composite battery management control method of an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms "first", "second", "target", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] Embodiment 1

[0030] Figure 1 This is a schematic diagram of the structure of a composite battery management control system provided by Embodiment 1 of the present invention. Figure 1 As shown, the system includes: a target battery pack 110, a temperature sensor 120, a current sensor 130, a voltage acquisition line 140 and a battery management module 150, the target battery pack 110 is respectively connected to the temperature sensor 120, the current sensor 130 and the voltage acquisition line 140, and the battery management module 150 is respectively connected to the temperature sensor 120, the current sensor 130 and the voltage acquisition line 140;

[0031] The temperature sensor 120 is used to collect the real-time temperature of the target battery pack 110; wherein the target battery pack includes a high-voltage lithium battery pack and a low-voltage lithium battery pack;

[0032] A current sensor 130 is used to collect the charge and discharge current of the target battery pack 110;

[0033] The voltage collection line 140 is used to collect the cell voltage of each cell in the target battery group 110;

[0034] The battery management module 150 is used to perform fault diagnosis on the target battery group according to the real-time temperature, charge and discharge current and single cell voltage of the target battery group 110, generate a temperature management mechanism according to the fault diagnosis result, real-time temperature and single cell voltage, and realize temperature control of the target battery group 110 according to the temperature management mechanism.

[0035] In this embodiment, the high-voltage lithium battery pack may refer to a high-voltage energy storage power battery pack adapted for pure electric vehicles or hybrid vehicles, which provides electrical energy for the power motor of the entire vehicle, and stores electrical energy from external charging or power motor power generation; it is composed of multiple high-voltage side lithium battery cells. The low-voltage lithium battery pack may refer to a low-voltage energy storage battery for the entire vehicle, which has the same function as the lead-acid battery of the entire vehicle, providing low-voltage electricity for the electrical equipment of the entire vehicle, providing electrical energy for engine starting, and balancing the output voltage of the generator or DC converter; it is composed of multiple low-voltage side lithium battery cells. It is worth noting that the number of high-voltage side lithium battery cells may be the same as or different from the number of low-voltage side lithium battery cells, and the embodiment of the present invention does not limit this.

[0036] The temperature sensor 120 may refer to a sensor disposed inside the target battery pack 110 for collecting the real-time temperature of the target battery pack 110. If the target battery pack 110 is a high-voltage lithium battery pack, a plurality of temperature sensors 120 disposed inside the high-voltage lithium battery pack may be combined into a high-voltage side temperature sensor; similarly, if the target battery pack 110 is a low-voltage lithium battery pack, a plurality of temperature sensors 120 disposed inside the low-voltage lithium battery pack may be combined into a low-voltage side temperature sensor.

[0037] The current sensor 130 may refer to a sensor arranged between the target battery pack 110 and the positive connector. If the target battery pack 110 is a high-voltage lithium battery pack, the current sensor 130 may be a high-voltage current sensor between the high-voltage positive connector and the high-voltage lithium battery pack or between the high-voltage negative connector and the high-voltage lithium battery pack, used to collect the charge and discharge current of the high-voltage lithium battery pack. Exemplarily, the high-voltage current sensor may be a Hall-type current sensor. If the target battery pack 110 is a low-voltage lithium battery pack, the current sensor 130 may be a low-voltage current sensor between the low-voltage positive connector and the low-voltage lithium battery pack or between the low-voltage negative connector and the low-voltage lithium battery pack, used to collect the charge and discharge current of the low-voltage lithium battery pack. Exemplarily, the low-voltage current sensor may be a Hall-type current sensor or a shunt.

[0038] The battery management module 150 may refer to a physical device that generates a composite battery management control strategy and executes the management control strategy. Fault diagnosis may refer to determining the fault occurrence of the current target battery pack 110. For example, it may be whether the real-time temperature exceeds a preset temperature threshold, or whether there is voltage and current when the target battery pack 110 is not working. The fault diagnosis result may refer to the judgment result generated by the fault diagnosis. For example, it may be that a fault exists or that there is no fault. The temperature management mechanism may refer to a heating or cooling temperature management mechanism generated according to the fault diagnosis result, real-time temperature and single cell voltage of the target battery pack 110, so as to perform timely temperature management of the target battery pack.

[0039] The technical solution of the embodiment of the present invention is that the target battery group 110 is connected to the temperature sensor 120, the current sensor 130 and the voltage acquisition line 140 respectively through the target battery group 110, the temperature sensor 120, the current sensor 130 and the voltage acquisition line 140, and the battery management module 150 is connected to the temperature sensor 120, the current sensor 130 and the voltage acquisition line 140 respectively; the temperature sensor 120 is used to collect the real-time temperature of the target battery group 110; wherein the target battery group includes a high-voltage lithium battery group and a low-voltage lithium battery group; the current sensor 13 ... The sensor 130 is used to collect the charge and discharge current of the target battery group 110; the voltage collection line 140 is used to collect the single cell voltage of each single cell in the target battery group 110; the battery management module 150 is used to perform fault diagnosis on the target battery group according to the real-time temperature, charge and discharge current and single cell voltage of the target battery group 110, generate a temperature management mechanism according to the fault diagnosis result, real-time temperature and single cell voltage, and implement temperature control of the target battery group 110 according to the temperature management mechanism, thereby realizing management and control of the composite battery and improving the thermal management performance and safety of the composite battery.

[0040] Optionally, the composite battery management and control system may further include: a high-pressure side liquid-cooled radiator, a low-pressure side liquid-cooled radiator, a liquid-cooled water outlet and a liquid-cooled water inlet; the high-pressure side liquid-cooled radiator is connected to the liquid-cooled water outlet, the low-pressure side liquid-cooled radiator is connected to the liquid-cooled water inlet, the battery management module 150 is respectively connected to the liquid-cooled water outlet and the liquid-cooled water inlet, and the high-pressure side liquid-cooled radiator and the low-pressure side liquid-cooled radiator are arranged close to the target battery pack 110 in space; the high-pressure side liquid-cooled radiator is used to store liquid cooling on the high-pressure lithium battery pack side; the low-pressure side liquid-cooled radiator is used to store liquid cooling on the low-pressure lithium battery pack side; The liquid cooling water inlet is used for the liquid cooling to flow in; the liquid cooling water outlet is used for the liquid cooling to be discharged; the battery management module 150 is also used to generate a battery cooling management mechanism based on the fault diagnosis result, real-time temperature and single cell voltage, determine the type of the target battery pack 110 according to the preset cooling conditions, and send the battery cooling management mechanism and the type of the target battery pack 110 to the liquid cooling water outlet or the liquid cooling water inlet, control the liquid cooling water outlet or the liquid cooling water inlet to control the temperature of the liquid cooling in the high-pressure side liquid cooling radiator or the low-pressure side liquid cooling radiator, and realize the temperature control of the target battery pack 110.

[0041] In this embodiment, the high-pressure side liquid-cooled radiator may refer to a liquid-cooled radiator arranged inside and around the high-pressure lithium battery pack. The low-pressure side liquid-cooled radiator may refer to a liquid-cooled radiator arranged inside and around the low-pressure lithium battery pack. Specifically, the high-pressure side liquid-cooled radiator may be connected to the low-pressure side liquid-cooled radiator, the high-pressure side liquid-cooled radiator may be connected to the liquid-cooled water outlet, and the high-pressure side liquid-cooled radiator may be connected to the liquid-cooled water outlet, thereby forming a liquid cooling circuit.

[0042] Optionally, the composite battery management and control system also includes: a high-pressure side heating connector, a low-pressure side heating connector, a high-pressure side heating film and a low-pressure side heating film; the battery management module 150 is connected to the high-pressure side heating connector and the low-pressure side heating connector, respectively, and the high-pressure side heating connector and the low-pressure side heating connector are connected to the high-pressure side heating film and the low-pressure side heating film, respectively, and the high-pressure side heating film and the low-pressure side heating film are arranged close to the target battery pack 110 in space; the high-pressure side heating connector is used to supply power to the high-pressure side heating film according to the temperature management mechanism issued by the battery management module 150; the low-pressure side heating connector is used to supply power to the high-pressure side heating film according to the temperature management mechanism issued by the battery management module 150 The temperature management mechanism supplies power to the low-voltage side heating film; the high-voltage side heating film is used to heat the high-voltage lithium battery pack; the low-voltage side heating film is used to heat the low-voltage lithium battery pack; the battery management module 150 is also used to generate a battery heating management mechanism according to the fault diagnosis result, real-time temperature and single cell voltage, determine the type of the target battery pack 110 according to the preset heating conditions, and send the battery heating management mechanism and the type of the target battery pack 110 to the high-voltage side heating connector or the low-voltage side heating connector, control the high-voltage side heating connector or the low-voltage side heating connector to supply power to the high-voltage side heating film or the low-voltage side heating film, so as to achieve temperature control of the target battery pack 110.

[0043] Specifically, the heating interface of the high-pressure side heating connector is connected to the high-pressure side heating film, and the heating interface of the low-pressure side heating connector is connected to the low-pressure side heating film. The high-pressure side heating film is arranged close to the high-pressure lithium battery pack in space, and the low-pressure side heating film is arranged close to the low-pressure lithium battery pack in space, thereby constituting independent heating circuits between the high-pressure lithium battery pack and the low-pressure lithium battery pack.

[0044] The temperature system of the composite battery provided in the embodiment of the present invention can execute the temperature method of the composite battery provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0045] It is worth noting that in the embodiment of the present invention, the battery management module can realize battery cell voltage reporting, sampling point temperature monitoring, total voltage reporting, charge and discharge current monitoring, remaining power estimation, battery fault diagnosis, communication, etc. of the high-voltage lithium battery pack and the low-voltage lithium battery pack. According to the adaptation of the whole vehicle, the real-time allowable charging current, real-time allowable discharge current, etc. of the low-voltage lithium battery pack and the high-voltage lithium battery pack can also be reported.

[0046] like Figure 2The structure diagram of an optional composite battery management control system provided according to the first embodiment of the present invention is shown. Specifically, it may include a high-voltage lithium battery pack 1, a high-voltage lithium battery maintenance switch 2, a battery management system (i.e., a battery management module) 3, a high-voltage side liquid cooling row 4, a low-voltage side liquid cooling row 5, a high-voltage side heating film 6, a low-voltage side heating film 7, a high-voltage positive connector 8, a high-voltage negative connector 9, a high-voltage current sensor 10, a low-voltage lithium battery pack 11, a low-voltage current sensor 12, a liquid cooling water inlet 13, a liquid cooling water outlet 14, a low-voltage positive connector 15, a low-voltage negative connector 16, a low-voltage lithium battery maintenance switch 17, a temperature sampling harness 18, a single cell voltage sampling harness 19, a current sensor sampling harness 20, a controller area network (CAN) communication harness 21, a vehicle electrical harness 22, a relay drive output harness 23, a high-voltage side temperature sensor 24, a low-voltage side temperature sensor 25, a battery box 26, a high-voltage side heating connector 27, and a low-voltage side heating connector 28.

[0047] The battery box 26 may be an outer box of the composite battery system, and may include a high-voltage lithium battery pack 1, a high-voltage side liquid-cooled radiator 4, a low-voltage side liquid-cooled radiator 5, a high-voltage side heating film 6, a low-voltage side heating film 7, a high-voltage current sensor 10, a low-voltage lithium battery pack 11, and a low-voltage current sensor 12. A high-voltage lithium battery maintenance switch 2, a battery management system (i.e., a battery management module) 3, a high-voltage positive connector 8, a high-voltage negative connector 9, a low-voltage positive connector 15, a low-voltage negative connector 16, a low-voltage lithium battery maintenance switch 17, a liquid cooling water inlet 13, and a liquid cooling water outlet 14 are located on the battery box 26.

[0048] The high-voltage lithium battery inspection switch 2 can be used to connect the positive electrode of the high-voltage lithium battery pack 1 with the high-voltage positive electrode connector 8. Specifically, the high-voltage lithium battery inspection switch 2 can be composed of a quick-plug connector and an internal high-voltage fuse, and the output of the high-voltage lithium battery pack 1 can be manually disconnected by plugging and unplugging operations. At the same time, when the high-voltage circuit is overcurrent, the high-voltage fuse is quickly disconnected to protect the high-voltage lithium battery pack 1.

[0049] The high-voltage positive connector 8 and the high-voltage negative connector 9 can realize the power output of the high-voltage lithium battery pack 1 and are connected to the positive and negative electrodes corresponding to the high-voltage power distribution equipment or power-consuming equipment of the whole vehicle.

[0050] The low-voltage lithium battery inspection switch 17 can be used to connect the positive electrode of the low-voltage lithium battery pack 11 to the low-voltage positive electrode connector 15. Specifically, the low-voltage lithium battery inspection switch 17 can be composed of a quick-plug connector and an internal low-voltage fuse, and the output of the low-voltage lithium battery pack 11 can be manually disconnected by plugging and unplugging operations. At the same time, when the low-voltage circuit is overcurrent, the low-voltage fuse is quickly disconnected to protect the low-voltage lithium battery pack 11.

[0051] The low-voltage positive connector 15 and the low-voltage negative connector 16 can realize the power output of the low-voltage lithium battery pack 11 and are connected to the positive and negative electrodes corresponding to the low-voltage power distribution equipment or power-consuming equipment of the whole vehicle.

[0052] The battery management system 3 collects the temperature sensor signals corresponding to the high-voltage lithium battery pack 1 and the low-voltage lithium battery pack 11 through the temperature sampling harness 18. The battery management system 3 collects the voltage of each battery cell in the high-voltage lithium battery pack 1 and the low-voltage lithium battery pack 11 through the single cell voltage sampling harness 19. The battery management system 3 collects the signals of the high-voltage current sensor 10 and the low-voltage current sensor 12 through the current sensor sampling harness 20. The battery management system 3 communicates with other CAN nodes of the vehicle through the CAN communication harness 21. The battery management system 3 controls the externally adapted relay through the relay drive output harness 23.

[0053] like Figure 3 The figure shows a workflow diagram of a composite battery management and control system provided by the first embodiment of the present invention. Specifically, when the vehicle is powered on, the composite battery management and control system starts to work and enters the working state, the magnetic latching relay is closed, and the state monitoring, message reporting and shutdown state check of the target battery pack are performed. Among them, the magnetic latching relay may refer to an external relay connected to the composite battery management and control system. When the vehicle is powered off, the composite battery management and control system enters a low power consumption or shutdown state, and the magnetic latching relay is disconnected.

[0054] Embodiment 2

[0055] Figure 4 A flow chart of a composite battery management control method is provided for the second embodiment of the present invention. This embodiment is applicable to the case of unified management and control of the temperature of a composite battery. The method can be executed by a composite battery management control system. The composite battery management control system can be implemented in the form of hardware and / or software. The system can be configured in a vehicle. Figure 3 As shown, the method includes:

[0056] S210, obtaining the real-time temperature, charge and discharge current, and cell voltage of each cell of the target battery pack; wherein the target battery pack includes a high-voltage lithium battery pack and a low-voltage lithium battery pack.

[0057] The real-time temperature may refer to the temperature of the target battery pack collected in real time by the temperature sensor. Specifically, the real-time temperature of the target battery pack may be obtained by analyzing the temperature collected in real time by the temperature sensor. The charge and discharge current may refer to the charge current and discharge current allowed in real time by the target battery pack.

[0058] In an optional embodiment, the embodiment of the present invention may also include: standardizing the real-time temperature of the target battery pack according to a preset threshold value to obtain a target temperature value; evaluating the remaining power of the target battery pack according to historical data and the single cell voltage to obtain the real-time remaining power; and obtaining the real-time allowable charging current and real-time allowable discharging current of the target battery pack according to the target temperature value and the real-time remaining power corresponding to the target battery pack.

[0059] The preset threshold value may refer to a preset value for evaluating the real-time temperature. The target temperature value may refer to a corresponding value obtained after the real-time temperature of the target battery pack is standardized. For example, in the embodiment of the present invention, a temperature value of 30 degrees Celsius may be selected as the preset threshold value. Specifically, the maximum value T of the real-time temperature of each target battery pack is obtained. BPmax and minimum value T BPmin , when T BPmin When the value is greater than 30 degrees Celsius, the target temperature value of the target battery pack is equal to T BPmin When T BPmax When the value is less than 30 degrees Celsius, the target temperature value of the target battery pack is equal to T BPmax ; When the above two conditions are not met: the target temperature value It is worth noting that when the target battery pack is a high-voltage lithium battery pack, T BP =T HVBP ; When the target battery pack is a low-voltage lithium battery pack, T BP =T LVBP .

[0060] Among them, the single cell voltage may refer to the voltage of each single cell in the target battery pack, which may be obtained, for example, through a voltage acquisition line. The historical data may refer to the original real-time remaining power data of the target battery pack, which may usually be read from an internal Flash or EEPROM. The real-time remaining power may refer to the remaining power of the target battery pack in the current real-time state. For example, the historical data may be used to search and match the corresponding power according to the voltage pulse amplitude of the target battery pack as the real-time remaining power.

[0061] The real-time allowed charging current and real-time allowed discharging current of the target battery pack can be obtained in the following manner. For example, taking the target battery pack as a high-voltage lithium battery pack, if the real-time remaining power of the high-voltage lithium battery pack is SOC and the real-time temperature is T HVBP , then the charging current is I chg =LookupMAP1(SOC,T HVBP ); the discharge current is I Dischg =LookupMAP2(SOC,T HVBP ). The real-time allowable charging current and discharging current corresponding to the low-voltage lithium battery pack can be obtained in the same way.

[0062] Thus, the standardized target temperature value, the real-time remaining power, and the real-time allowed charging current and the real-time allowed discharging current of the target battery pack can be obtained, providing an effective basis for subsequent steps.

[0063] S220 , performing fault diagnosis on the target battery pack according to the real-time temperature, charge and discharge current, and single cell voltage of the target battery pack, and generating a fault diagnosis result.

[0064] Among them, fault diagnosis may refer to identifying the fault condition of the target battery pack. Exemplarily, fault diagnosis may be performed based on whether the real-time temperature of the target battery pack reaches a preset temperature threshold, or based on whether there is voltage and current when the target battery pack is not working. The fault diagnosis result may refer to the judgment result generated by the fault diagnosis, which may be, for example, the presence of a fault or the absence of a fault.

[0065] S230 , generating a temperature management mechanism according to the fault diagnosis result, the real-time temperature and the cell voltage, and implementing temperature control of the target battery pack according to the temperature management mechanism.

[0066] Among them, the temperature management mechanism may refer to a heating or cooling temperature management mechanism generated according to the fault diagnosis result of the target battery pack, the target temperature value after real-time temperature normalization processing, and the single cell voltage, so as to perform timely temperature management of the target battery pack.

[0067] In another optional embodiment, a temperature management mechanism is generated based on the fault diagnosis result, the real-time remaining power, the real-time allowable charging current and the real-time allowable discharge current of the target battery pack, including: if the fault diagnosis result is no fault, the real-time allowable discharge current of the target battery pack is greater than the current consumed by the cooling device, and the real-time remaining power is greater than the calibrated cooling power threshold, then a battery cooling management mechanism is generated; if the fault diagnosis result is no fault, the real-time allowable discharge current of the target battery pack is greater than the current consumed by the heating device, and the real-time remaining power is greater than the calibrated heating power threshold, then a battery heating management mechanism is generated.

[0068] Among them, since the temperature impact of the high-voltage lithium battery pack is greater than that of the low-voltage lithium battery pack, in order to reduce the data processing flow, in an embodiment of the present invention, the target battery pack used when generating the temperature management mechanism can be selected as a high-voltage lithium battery pack.

[0069] Specifically, if the fault diagnosis result is no fault, the real-time allowable discharge current I of the high-voltage lithium battery pack is Dischg Greater than the current consumed by the cooling device and the real-time remaining power is greater than the calibrated cooling power threshold SOC CoolingLThr , a battery cooling management mechanism is generated; if the fault diagnosis result is no fault, the high-voltage lithium battery pack real-time allowable discharge current IDischg Greater than the current consumed by the heating device and the real-time remaining power is greater than the calibrated heating power threshold SOC HeatLThr , a battery heating management mechanism is generated.

[0070] Therefore, the corresponding battery cooling management mechanism or battery heating management mechanism can be generated according to the fault diagnosis results of the high-voltage lithium battery pack, the real-time allowable discharge current and the real-time remaining power, and the temperature management mechanism can be divided more finely, thereby improving the safety of the composite battery.

[0071] On the basis of the above embodiment, optionally, temperature control of the target battery pack is achieved according to a temperature management mechanism, including: if the temperature management mechanism is a battery cooling management mechanism, the type of the target battery pack is determined according to preset cooling conditions, and the battery cooling management mechanism and the type of the target battery pack are sent to the liquid cooling outlet or the liquid cooling inlet, and the liquid cooling outlet or the liquid cooling inlet is controlled to control the temperature influence of the liquid cooling in the high-pressure side liquid-cooled radiator or the low-pressure side liquid-cooled radiator, so as to achieve temperature control of the target battery pack; if the temperature management mechanism is a battery heating management mechanism, the type of the target battery pack is determined according to preset heating conditions, and the battery heating management mechanism and the type of the target battery pack are sent to the high-pressure side heating connector or the low-pressure side heating connector, and the high-pressure side heating connector or the low-pressure side heating connector is controlled to supply power to the high-pressure side heating film or the low-pressure side heating film, so as to achieve temperature control of the target battery pack.

[0072] The preset cooling condition may refer to a preset temperature threshold for determining the type of the target battery pack in the battery cooling management mechanism. The preset heating condition may refer to a preset temperature threshold for determining the type of the target battery pack in the battery heating management mechanism.

[0073] Specifically, when the type of the target battery pack is determined according to the preset cooling conditions, the flow rate and flow rate of the liquid cooling in the liquid cooling outlet or the liquid cooling inlet can be controlled to control the temperature of the liquid cooling in the high-pressure side liquid cooling row or the low-pressure side liquid cooling row to achieve the cooling operation of the target battery pack. When the type of the target battery pack is determined according to the preset heating conditions, the power supply of the high-pressure side heating connector or the low-pressure side heating connector to the high-pressure side heating film or the low-pressure side heating film can be controlled to achieve the heating operation of the target battery pack.

[0074] Optionally, the type of the target battery pack is determined based on preset heating conditions, including: if the target temperature value corresponding to the high-voltage lithium battery pack is lower than the calibrated minimum temperature threshold of the high-voltage side, the type of the target battery pack is determined to be a high-voltage lithium battery pack, until the target temperature value is higher than the calibrated maximum temperature threshold of the high-voltage side; if the target temperature value corresponding to the low-voltage lithium battery pack is lower than the calibrated minimum temperature threshold of the low-voltage side, the type of the target battery pack is determined to be a low-voltage lithium battery pack, until the target temperature value is higher than the calibrated maximum temperature threshold of the low-voltage side.

[0075] The calibrated high-side minimum temperature threshold may refer to a value pre-set under the battery heating management mechanism for evaluating the minimum temperature of the high-side. HVBPHeatLThr The calibrated high-side maximum temperature threshold may refer to a value pre-set under the battery heating management mechanism for evaluating the maximum temperature of the high-side. HVBPHeatHThr It is worth noting that the calibrated high-voltage side maximum temperature threshold is greater than the calibrated high-voltage side minimum temperature threshold, and the calibrated high-voltage side minimum temperature threshold and the calibrated high-voltage side maximum temperature threshold are determined by the characteristics of the high-voltage lithium battery pack, which is not limited in the embodiment of the present invention.

[0076] The calibrated low-pressure side minimum temperature threshold may refer to a value preset under the battery heating management mechanism for evaluating the minimum temperature of the low-pressure side. LVBPHeatLThr The calibrated low-pressure side maximum temperature threshold may refer to a value preset under the battery heating management mechanism for evaluating the maximum temperature of the low-pressure side. For example, the symbol T LVBPHeatHThr It is worth noting that the calibrated low-voltage side maximum temperature threshold is greater than the calibrated low-voltage side minimum temperature threshold, and the calibrated low-voltage side minimum temperature threshold and the calibrated low-voltage side maximum temperature threshold are determined by the characteristics of the low-voltage lithium battery pack, which is not limited in the embodiment of the present invention.

[0077] Specifically, when the target temperature value corresponding to the high-voltage lithium battery pack is lower than T HVBPHeatLThr When the target temperature value of the high-voltage lithium battery pack is higher than T HVBPHeatHThr It is determined that the request to turn off the high-voltage lithium battery pack battery heating is required; when the target temperature value corresponding to the high-voltage lithium battery pack is at T HVBPHeatLThr and T HVBPHeatHThr When the target temperature value of the high-voltage lithium battery pack is between T and , the target temperature value of the high-voltage lithium battery pack is kept higher than the previous state. Similarly, when the target temperature value of the low-voltage lithium battery pack is lower than T LVBPHeatLThr When the target temperature value corresponding to the low-voltage lithium battery pack is higher than T LVBPHeatHThrThen it is determined that the request to turn off the low-voltage lithium battery pack battery heating is required; when the target temperature value corresponding to the low-voltage lithium battery pack is at T LVBPHeatLThr and T LVBPHeatHThr When the target temperature value corresponding to the low-voltage lithium battery pack is maintained higher than the previous state.

[0078] Optionally, the type of the target battery pack is determined based on preset cooling conditions, including: if the target temperature value corresponding to the high-pressure lithium battery pack is higher than the calibrated high-pressure side maximum cooling temperature threshold or the calibrated low-pressure side maximum cooling temperature threshold, then the type of the target battery pack is determined to be a high-pressure lithium battery pack, until the target temperature value is lower than the calibrated high-pressure side minimum cooling temperature threshold and lower than the calibrated low-pressure side minimum cooling temperature threshold.

[0079] The calibrated high-side maximum cooling temperature threshold may refer to a value pre-set under the battery cooling management mechanism for evaluating the minimum temperature of the high-side. HVBPCoolingHThr The calibrated low-pressure side maximum cooling temperature threshold may refer to a value pre-set under the battery cooling management mechanism for evaluating the minimum temperature of the low-pressure side. LVBPCoolingHThr The calibrated high-side minimum cooling temperature threshold may refer to a value pre-set under the battery cooling management mechanism for evaluating the maximum temperature of the high-side. HVBPCoolingHThr The calibrated low-pressure side minimum cooling temperature threshold may refer to a value pre-set under the battery cooling management mechanism for evaluating the maximum temperature of the low-pressure side. LVBPCoolingHThr It is worth noting that T HVBPCoolingHThr , T LVBPCoolingHThr , T HVBPCoolingHThr and T LVBPCoolingHThr The above is determined by the characteristics of the high-voltage lithium battery pack and the low-voltage lithium battery pack, and the embodiment of the present invention does not limit this.

[0080] Specifically, when the target temperature value corresponding to the high-voltage lithium battery pack is higher than T HVBPCoolingHThr or T LVBPCoolingHThr When the target temperature value of the high-voltage lithium battery pack is lower than T HVBPCoolingHThr And lower than T LVBPCoolingHThr When the target temperature value corresponding to the high-voltage lithium battery pack is in other temperature ranges, the target temperature value corresponding to the high-voltage lithium battery pack is kept constant and changes more than the previous state.

[0081] The technical solution of the embodiment of the present invention generates a fault diagnosis result by performing fault diagnosis on the target battery pack according to the acquired real-time temperature, charge and discharge current and single cell voltage of the target battery pack. Furthermore, a temperature management mechanism is generated according to the fault diagnosis result, the real-time temperature and the single cell voltage, and the temperature of the target battery pack is controlled according to the temperature management mechanism, thereby realizing the management and control of the composite battery and improving the thermal management performance and safety of the composite battery.

[0082] Figure 5 A flowchart of an optional composite battery management control method provided by an embodiment of the present invention. Specifically, when the vehicle is powered on, the composite battery management control system for executing the composite battery management control method is awakened, and historical data is read from the internal Flash or EEPROM. The real-time temperature of the target battery pack is standardized according to a preset threshold to obtain a target temperature value; the remaining power of the target battery pack is evaluated according to the historical data and the single cell voltage to obtain the real-time remaining power; the real-time allowable charging current and the real-time allowable discharge current of the target battery pack are obtained according to the target temperature value and the real-time remaining power corresponding to the target battery pack. At the same time, the target battery pack is fault diagnosed according to the real-time temperature, charge and discharge current and single cell voltage of the target battery pack to generate a fault diagnosis result. If the fault diagnosis result is that there is no fault and the real-time allowable discharge current I of the high-voltage lithium battery pack is 0.01V, the real-time allowable discharge current I of the high-voltage lithium battery pack is 0.01V. Dischg Greater than the current consumed by the cooling device and the real-time remaining power is greater than the calibrated cooling power threshold SOC CoolingLThr , a battery cooling management mechanism is generated; if the fault diagnosis result is no fault, the high-voltage lithium battery pack real-time allowable discharge current I Dischg Greater than the current consumed by the heating device and the real-time remaining power is greater than the calibrated heating power threshold SOC HeatLThr , then a battery heating management mechanism is generated. Further, under the battery heating management mechanism, when the target temperature value corresponding to the high-voltage lithium battery pack is lower than T HVBPHeatLThr When the target temperature value of the high-voltage lithium battery pack is higher than T HVBPHeatHThr Then it is determined that the high-voltage lithium battery pack heating is turned off; when the target temperature value corresponding to the low-voltage lithium battery pack is lower than T LVBPHeatLThr When the target temperature value corresponding to the low-voltage lithium battery pack is higher than T LVBPHeatHThr Then it is determined that the low-voltage lithium battery pack heating is turned off. Under the battery cooling management mechanism, when the target temperature value corresponding to the high-voltage lithium battery pack is higher than T HVBPCoolingHThr or T LVBPCoolingHThr When the target temperature value of the high-voltage lithium battery pack is lower than T HVBPCoolingHThr And lower than T LVBPCoolingHThrWhen the battery cooling of the high-voltage lithium battery pack is turned off, it is determined that the battery cooling request is turned off. Therefore, the corresponding device is controlled to perform battery heating or battery cooling operation according to the corresponding temperature management mechanism and the type of the target battery pack.

[0083] On the basis of the above embodiments, the embodiments of the present invention may further add an external control unit to obtain various status signals of the composite battery management and control system through a controller area network (CAN) bus, so that when the composite battery management and control system cannot normally generate a temperature management mechanism, the temperature management mechanism generation operation is executed in a timely manner, thereby improving the thermal management performance of the composite battery.

[0084] Embodiment 3

[0085] Figure 6 A schematic diagram of a vehicle structure provided by an embodiment of the present invention is shown in FIG. Figure 6 As shown, the vehicle includes a processor 310, a memory 320, an input device 330, and an output device 340; the number of processors 310 in the vehicle can be one or more. Figure 6 A processor 310 is taken as an example; the processor 310, the memory 320, the input device 330 and the output device 340 in the vehicle can be connected via a bus or other means. Figure 6 The example of connecting through bus is taken in the following.

[0086] The memory 320 is a computer-readable storage medium that can be used to store software programs, computer executable programs and modules, such as program instructions / modules corresponding to the composite battery management control method in the embodiment of the present invention. The processor 310 executes various functional applications and data processing of the vehicle by running the software programs, instructions and modules stored in the memory 320, that is, realizing the above-mentioned composite battery management control method.

[0087] The memory 320 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created according to the use of the terminal, etc. In addition, the memory 320 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 320 may further include a memory remotely arranged relative to the processor 310, and these remote memories may be connected to the vehicle via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0088] The input device 330 may be used to receive input digital or character information and generate key signal input related to user settings and function control of the vehicle. The output device 340 may include a display device such as a display screen.

[0089] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0090] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite battery management and control system, characterized in that: include: A target battery pack, a temperature sensor, a current sensor, a voltage acquisition line, and a battery management module, wherein the target battery pack is connected to the temperature sensor, the current sensor, and the voltage acquisition line, respectively, and the battery management module is connected to the temperature sensor, the current sensor, and the voltage acquisition line, respectively; A temperature sensor is used to collect the real-time temperature of a target battery pack; wherein the target battery pack includes a high-voltage lithium battery pack and a low-voltage lithium battery pack; A current sensor for collecting the charge and discharge current of the target battery pack; A voltage acquisition line is used to acquire the single cell voltage of each single cell in the target battery pack; A battery management module is used to perform fault diagnosis on the target battery pack according to the real-time temperature, charge and discharge current and single cell voltage of the target battery pack, generate a temperature management mechanism according to the fault diagnosis result, the real-time temperature and single cell voltage, and realize temperature control of the target battery pack according to the temperature management mechanism; Wherein, the battery management module is also used for: Standardize the real-time temperature of the target battery pack according to a preset threshold value to obtain a target temperature value; Evaluate the remaining capacity of the target battery pack based on historical data and single cell voltage to obtain the real-time remaining capacity; According to the target temperature value and the real-time remaining power corresponding to the target battery pack, the real-time allowable charging current and the real-time allowable discharging current of the target battery pack are obtained; Wherein, the battery management module is specifically used for: If the fault diagnosis result is no fault, the real-time allowable discharge current of the target battery pack is greater than the current consumed by the cooling device, and the real-time remaining power is greater than the calibrated cooling power threshold, a battery cooling management mechanism is generated; If the fault diagnosis result is no fault, the real-time allowable discharge current of the target battery pack is greater than the current consumed by the heating device, and the real-time remaining power is greater than the calibrated heating power threshold, a battery heating management mechanism is generated; wherein the corresponding battery cooling management mechanism or battery heating management mechanism is generated according to the fault diagnosis result, the real-time allowable discharge current and the real-time remaining power of the high-voltage lithium battery pack; Wherein, the battery management module is specifically used for: If the temperature management mechanism is a battery cooling management mechanism, the type of the target battery pack is determined according to the preset cooling condition, and the battery cooling management mechanism and the type of the target battery pack are sent to the liquid cooling outlet or the liquid cooling inlet, and the liquid cooling outlet or the liquid cooling inlet is controlled to control the temperature effect of the liquid cooling in the high-pressure side liquid cooling radiator or the low-pressure side liquid cooling radiator, so as to realize the temperature control of the target battery pack; wherein the preset cooling condition refers to a pre-set temperature threshold for determining the type of the target battery pack in the battery cooling management mechanism; If the temperature management mechanism is a battery heating management mechanism, the type of the target battery pack is determined based on the preset heating conditions, and the battery heating management mechanism and the type of the target battery pack are sent to the high-voltage side heating connector or the low-voltage side heating connector, and the high-voltage side heating connector or the low-voltage side heating connector is controlled to supply power to the high-voltage side heating film or the low-voltage side heating film to achieve temperature control of the target battery pack; wherein the preset heating conditions refer to a pre-set temperature threshold for determining the type of the target battery pack in the battery heating management mechanism.

2. The system according to claim 1, characterized in that The composite battery management and control system further includes: a high-pressure side liquid-cooled radiator, a low-pressure side liquid-cooled radiator, a liquid-cooled water outlet and a liquid-cooled water inlet; the high-pressure side liquid-cooled radiator is connected to the liquid-cooled water outlet, the low-pressure side liquid-cooled radiator is connected to the liquid-cooled water inlet, the battery management module is respectively connected to the liquid-cooled water outlet and the liquid-cooled water inlet, and the high-pressure side liquid-cooled radiator and the low-pressure side liquid-cooled radiator are arranged close to the target battery pack in space; The high-voltage side liquid-cooled cold row is used to store liquid cooling on the high-voltage lithium battery pack side; The low-voltage side liquid-cooling radiator is used to store liquid cooling on the low-voltage lithium battery pack side; The liquid cooling water inlet is used for the inflow of liquid cooling; The liquid cooling outlet is used to discharge liquid cooling; The battery management module is also used to generate a battery cooling management mechanism based on the fault diagnosis results, real-time temperature and single cell voltage, determine the type of the target battery pack according to preset cooling conditions, and send the battery cooling management mechanism and the type of the target battery pack to the liquid cooling outlet or liquid cooling inlet, control the influence of the liquid cooling outlet or liquid cooling inlet on the temperature of the liquid cooling in the high-pressure side liquid cooling radiator or the low-pressure side liquid cooling radiator, and achieve temperature control of the target battery pack.

3. The system according to claim 1, characterized in that The composite battery management and control system further includes: a high-pressure side heating connector, a low-pressure side heating connector, a high-pressure side heating film, and a low-pressure side heating film; the battery management module is connected to the high-pressure side heating connector and the low-pressure side heating connector, respectively, the high-pressure side heating connector and the low-pressure side heating connector are connected to the high-pressure side heating film and the low-pressure side heating film, respectively, and the high-pressure side heating film and the low-pressure side heating film are arranged close to the target battery pack in space; The high-voltage side heating connector is used to supply power to the high-voltage side heating film according to the temperature management mechanism issued by the battery management module; The low-voltage side heating connector is used to supply power to the low-voltage side heating film according to the temperature management mechanism issued by the battery management module; The high-voltage side heating film is used to heat the high-voltage lithium battery pack; The low-voltage side heating film is used to heat the low-voltage lithium battery pack; The battery management module is also used to generate a battery heating management mechanism based on the fault diagnosis results, real-time temperature and single cell voltage, determine the type of the target battery pack based on preset heating conditions, and send the battery heating management mechanism and the type of the target battery pack to the high-voltage side heating connector or the low-voltage side heating connector, control the high-voltage side heating connector or the low-voltage side heating connector to supply power to the high-voltage side heating film or the low-voltage side heating film, so as to achieve temperature control of the target battery pack.

4. A composite battery management control method, characterized in that: include: Obtaining the real-time temperature, charge and discharge current, and cell voltage of each cell of the target battery pack; wherein the target battery pack includes a high-voltage lithium battery pack and a low-voltage lithium battery pack; Perform fault diagnosis on the target battery pack according to the real-time temperature, charge and discharge current and single cell voltage of the target battery pack, and generate fault diagnosis results; Generate a temperature management mechanism based on the fault diagnosis results, real-time temperature and single cell voltage, and implement temperature control of the target battery pack based on the temperature management mechanism; Wherein, the method further comprises: Standardize the real-time temperature of the target battery pack according to a preset threshold value to obtain a target temperature value; Evaluate the remaining capacity of the target battery pack based on historical data and single cell voltage to obtain the real-time remaining capacity; According to the target temperature value and the real-time remaining power corresponding to the target battery pack, the real-time allowable charging current and the real-time allowable discharging current of the target battery pack are obtained; The temperature management mechanism is generated according to the fault diagnosis result, the real-time temperature and the cell voltage, including: If the fault diagnosis result is no fault, the real-time allowable discharge current of the target battery pack is greater than the current consumed by the cooling device, and the real-time remaining power is greater than the calibrated cooling power threshold, a battery cooling management mechanism is generated; If the fault diagnosis result is no fault, the real-time allowable discharge current of the target battery pack is greater than the current consumed by the heating device, and the real-time remaining power is greater than the calibrated heating power threshold, a battery heating management mechanism is generated; wherein the corresponding battery cooling management mechanism or battery heating management mechanism is generated according to the fault diagnosis result, the real-time allowable discharge current and the real-time remaining power of the high-voltage lithium battery pack; The temperature control of the target battery pack according to the temperature management mechanism includes: If the temperature management mechanism is a battery cooling management mechanism, the type of the target battery pack is determined according to the preset cooling condition, and the battery cooling management mechanism and the type of the target battery pack are sent to the liquid cooling outlet or the liquid cooling inlet, and the liquid cooling outlet or the liquid cooling inlet is controlled to control the temperature effect of the liquid cooling in the high-pressure side liquid cooling radiator or the low-pressure side liquid cooling radiator, so as to realize the temperature control of the target battery pack; wherein the preset cooling condition refers to a pre-set temperature threshold for determining the type of the target battery pack in the battery cooling management mechanism; If the temperature management mechanism is a battery heating management mechanism, the type of the target battery pack is determined based on the preset heating conditions, and the battery heating management mechanism and the type of the target battery pack are sent to the high-voltage side heating connector or the low-voltage side heating connector, and the high-voltage side heating connector or the low-voltage side heating connector is controlled to supply power to the high-voltage side heating film or the low-voltage side heating film to achieve temperature control of the target battery pack; wherein the preset heating conditions refer to a pre-set temperature threshold for determining the type of the target battery pack in the battery heating management mechanism.

5. The method according to claim 4, characterized in that The step of determining the type of the target battery pack according to the preset heating condition includes: If the target temperature value corresponding to the high-voltage lithium battery pack is lower than the calibrated high-voltage side minimum temperature threshold, the type of the target battery pack is determined to be a high-voltage lithium battery pack until the target temperature value is higher than the calibrated high-voltage side maximum temperature threshold; If the target temperature value corresponding to the low-voltage lithium battery pack is lower than the calibrated low-voltage side minimum temperature threshold, the type of the target battery pack is determined to be a low-voltage lithium battery pack until the target temperature value is higher than the calibrated low-voltage side maximum temperature threshold.

6. The method according to claim 4, characterized in that The step of determining the type of the target battery pack according to the preset cooling condition includes: If the target temperature value corresponding to the high-voltage lithium battery pack is higher than the calibrated high-pressure side maximum cooling temperature threshold or the calibrated low-pressure side maximum cooling temperature threshold, the type of the target battery pack is determined as a high-voltage lithium battery pack until the target temperature value is lower than the calibrated high-pressure side minimum cooling temperature threshold and lower than the calibrated low-pressure side minimum cooling temperature threshold.

7. A vehicle, characterized in that: The vehicle comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the composite battery management control method according to any one of claims 4 to 6.

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