Battery heating method and device, vehicle and storage medium

Abstract

The invention relates to the technical field of new energy vehicles, in particular to a battery heating method and device, a vehicle and a storage medium. The method comprises the steps that the current temperature of each single battery cell in a power battery pack is collected, if the current temperature is within a preset temperature interval, a vehicle control unit is awakened, a high-voltage power-on request is sent to the vehicle control unit, and if a high-voltage power-on instruction fed back by the vehicle control unit based on the high-voltage power-on request is received, high-voltage power-on is carried out, and a heating request is sent to the heat management system, so that the power battery pack is heated through the heat management system. Therefore, the problem that heat preservation of the vehicle battery cannot be monitored in real time at the present stage is solved, and when a user does not use the vehicle, the battery manager can regularly inspect the temperature of the battery, judge the requirement of low-temperature heat preservation and heating and automatically heat the power battery; therefore, the temperature of the power battery can still meet the starting requirement when a user uses a vehicle, and the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a battery heating method, device, vehicle and storage medium. Background Art

[0002] As the use of new energy vehicles becomes more and more popular, the research on power batteries, the power core of new energy vehicles, is becoming more and more important. At present, power batteries with lithium ions as the main component have the following problems:

[0003] (1) Negative impact of low temperature on batteries: The applicable range of lithium-ion batteries is -30℃~55℃, while the temperature in extremely cold areas can reach minus 50 degrees Celsius. Under low temperature conditions, lithium will deposit at the negative electrode, which will reduce the number of mobile lithium ions, reduce battery activity, and reduce the battery capacity and discharge capacity. On the other hand, the increasing amount of deposited lithium (dendrites) at the negative electrode will increase the risk of puncturing the battery pack and causing an internal short circuit.

[0004] (2) Thermal runaway risk: Lithium-ion batteries have a fatal flaw, which is that they are prone to thermal runaway under abnormal conditions and environments, causing overheating and smoking at the mildest, and fire and explosion at the worst.

[0005] (3) Restrictions on the use scenarios of new energy vehicles: The two most important performance factors of lithium-ion batteries are energy and power. The driving mileage of new energy vehicles is closely related to energy. The charging and discharging capacity is also closely related to the charging time and the use of high-power devices in the car. The negative impact of low temperature on batteries also limits the use of new energy vehicles in cold areas.

[0006] In the related art, the power battery can usually be heated only when the car is about to be started. However, in cold weather, it takes a long time to heat the power battery to the temperature for normal starting and use of the electric vehicle. In the related art, the low-temperature insulation heating technology is mainly divided into two directions: as a sub-function of the preheating function and plug-in insulation heating.

[0007] Patent [CN112810422A] and Patent [CN110970687A] mention the thermal insulation heating technology in the scheduled heating function. If the temperature of the power battery reaches the preset temperature value earlier than the heating stop time or when the preset heating target temperature is reached and the vehicle is not detected to be powered on within a certain preset time, the thermal insulation heating will be turned on to realize the heating process of the power battery according to the user's needs.

[0008] However, the problem is that the user needs to make an appointment for heating before the insulation and heating function can be turned on. It is impossible to monitor the vehicle's insulation needs in real time without wasting battery power, which needs to be solved urgently. Summary of the invention

[0009] One of the purposes of the present invention is to provide a battery heating method to solve the problem in the prior art that the vehicle battery insulation needs cannot be monitored in real time; the second purpose is to provide a battery heating device; the third purpose is to provide a vehicle; and the fourth purpose is to provide a computer-readable storage medium.

[0010] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0011] A battery heating method comprises the following steps:

[0012] Collect the current temperature of each single cell in the power battery pack;

[0013] If the current temperature is within a preset temperature range, waking up the vehicle controller and sending a high-voltage power-on request to the vehicle controller; and

[0014] If a high-voltage power-on instruction is received from the vehicle controller based on the high-voltage power-on request feedback, high-voltage power-on is performed, and a heating request is sent to the thermal management system to heat the power battery pack through the thermal management system.

[0015] According to the above technical means, the present invention can accurately identify and control the temperature threshold for starting the thermal insulation and heating function, which solves the problem that the vehicle battery insulation needs to be monitored in real time at this stage. When the user is not using the vehicle, the battery manager will regularly inspect the battery temperature, determine the need for low-temperature thermal insulation and heating, and automatically heat the power battery so that the power battery temperature can still meet the starting requirements when the user is using the vehicle, thereby improving the user experience.

[0016] Further, after sending the heating request to the thermal management system so as to heat the power battery pack through the thermal management system, the method further includes:

[0017] Collecting the heated temperature, state of charge and power battery pack state of each single cell in the power battery pack;

[0018] Based on the heated temperature of each single cell, determining whether the lowest temperature is greater than a preset threshold, or whether the state of charge is less than a preset state of charge, or whether the power battery pack is in a fault state, or whether a stop heating instruction is received;

[0019] If the minimum temperature is greater than the preset threshold, or the state of charge is less than the preset state of charge, or the power battery pack is in the fault state, or the stop heating instruction is received, heating of the power battery pack is stopped.

[0020] According to the above technical means, after heating the power battery pack, the present invention can stop heating the power battery pack as long as any condition is met, based on the judgment of the lowest temperature of the single battery cell after heating, the charge state, the power battery pack state and whether a stop heating instruction is received, thereby reducing energy consumption and the occurrence of faults.

[0021] Furthermore, after stopping heating the power battery pack, the method further includes:

[0022] Collecting the temperature of each single cell in the power battery pack after heating is stopped, and storing the temperature of each single cell after heating is stopped;

[0023] Control the current battery management system to enter sleep state.

[0024] According to the above technical means, the present invention collects and stores the temperature of each single cell after stopping heating the power battery pack, and then controls the battery management system to sleep, so as to realize 24-hour real-time monitoring of the temperature of each single cell.

[0025] Furthermore, before collecting the current temperature of each single cell in the power battery pack, the method further includes:

[0026] Collecting the temperature of each single cell in the power battery pack before stopping heating, and storing the temperature of each single cell before stopping heating;

[0027] Control the current battery management system to enter a dormant state.

[0028] According to the above technical means, the present invention collects and stores the temperature of each single cell after heating is stopped before collecting the current temperature of each single cell in the power battery pack, and then controls the battery management system to sleep, so as to realize 24-hour real-time monitoring of the temperature of each single cell.

[0029] Furthermore, the collecting of the current temperature of each single cell in the power battery pack includes:

[0030] Obtaining the energy consumption control requirements of the current battery management system, the current ambient temperature and weather information within a preset time period;

[0031] Determine a collection period of the temperature of each single cell in the power battery pack according to the energy consumption control requirement, the current ambient temperature and the weather information within the preset time period;

[0032] The current temperature of each single cell in the power battery pack is collected based on the collection cycle.

[0033] According to the above technical means, the present invention collects the current temperature of each single cell in the power battery pack by collecting the temperature of each single cell according to the energy consumption control requirements of the current battery management system, the current ambient temperature and the weather information within a preset time, so as to realize 24-hour real-time monitoring of the temperature of each single cell.

[0034] A battery heating device, comprising:

[0035] The acquisition module is used to collect the current temperature of each single cell in the power battery pack;

[0036] a sending module, configured to wake up the vehicle controller and send a high-voltage power-on request to the vehicle controller when the current temperature is within a preset temperature range; and

[0037] The heating module is used to perform high-voltage power-on upon receiving a high-voltage power-on instruction fed back by the vehicle controller based on the high-voltage power-on request, and send a heating request to the thermal management system so as to heat the power battery pack through the thermal management system.

[0038] Further, after sending the heating request to the thermal management system so as to heat the power battery pack through the thermal management system, the heating module is further used to:

[0039] Collecting the heated temperature, state of charge and power battery pack state of each single cell in the power battery pack;

[0040] Based on the heated temperature of each single cell, determining whether the lowest temperature is greater than a preset threshold, or whether the state of charge is less than a preset state of charge, or whether the power battery pack is in a fault state, or whether a stop heating instruction is received;

[0041] If the minimum temperature is greater than the preset threshold, or the state of charge is less than the preset state of charge, or the power battery pack is in the fault state, or the stop heating instruction is received, heating of the power battery pack is stopped.

[0042] Furthermore, after stopping heating the power battery pack, the heating module is further used to:

[0043] Collecting the temperature of each single cell in the power battery pack after heating is stopped, and storing the temperature of each single cell after heating is stopped;

[0044] Control the current battery management system to enter sleep state.

[0045] Furthermore, before collecting the current temperature of each single cell in the power battery pack, the collection module is also used to:

[0046] Collecting the temperature of each single cell in the power battery pack before stopping heating, and storing the temperature of each single cell before stopping heating;

[0047] Control the current battery management system to enter a dormant state.

[0048] Furthermore, the acquisition module is specifically used for:

[0049] Obtaining the energy consumption control requirements of the current battery management system, the current ambient temperature and weather information within a preset time period;

[0050] Determine a collection period of the temperature of each single cell in the power battery pack according to the energy consumption control requirement, the current ambient temperature and the weather information within the preset time period;

[0051] The current temperature of each single cell in the power battery pack is collected based on the collection cycle.

[0052] A vehicle comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the battery heating method as described in the above embodiment.

[0053] A computer-readable storage medium stores a computer program, which is executed by a processor to implement the battery heating method as described in the above embodiment.

[0054] Beneficial effects of the present invention:

[0055] (1) It can accurately identify and control the temperature threshold for starting the heat preservation and heating function. The power battery cannot be used below -30°C (this temperature threshold is related to the characteristics of the battery cell). Before reaching this threshold TBD°C (which can be temporarily set at 1 to 2°C, based on the characteristics of the power battery cell itself), it can accurately identify and start the function in time to avoid the situation where the battery cannot be used when it reaches -30°C.

[0056] (2) Low energy consumption. Under low voltage conditions, the battery management system monitors the temperature of the cell in real time 24 hours a day and makes its own judgments. When the function needs to be turned on, it sends a request to the vehicle system, allowing the vehicle system to make further judgments. There is no need to call the vehicle system in real time, so the energy consumption of this function is very low.

[0057] (3) The first 24-hour real-time monitoring of power battery insulation and heating provides a wider range of usage scenarios to meet vehicle use needs in extremely cold regions.

[0058] (4) Using the battery's own power, without an external power source, the thermal management is powered by the battery itself to achieve the purpose of heating to the normal starting battery temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 A flowchart of a battery heating method provided according to an embodiment of the present invention;

[0060] Figure 2 A flow chart showing how to start the heat preservation and heating function according to an embodiment of the present invention;

[0061] Figure 3 A flowchart of exiting the heat preservation and heating function according to an embodiment of the present invention;

[0062] Figure 4 is a block diagram of a battery heating device according to an embodiment of the present invention;

[0063] Figure 5 FIG. 4 is a schematic structural diagram of a vehicle according to an embodiment of the present invention.

[0064] Among them, 10 is a battery heating device, 100 is a collection module, 200 is a sending module, 300 is a heating module, 501 is a memory, 502 is a processor, and 503 is a communication interface. DETAILED DESCRIPTION

[0065] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0066] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0067] Specifically, Figure 1 The present invention provides a flow chart of a battery heating method.

[0068] Before introducing the battery heating method proposed in the embodiment of the present invention, a thermal insulation heating method in the related art is briefly introduced.

[0069] In the related art, the heat preservation and heating function can be turned on only after the vehicle has completed charging at the charging pile and the vehicle's onboard charger and the charging pile are kept in a plugged-in state.

[0070] However, this technology requires an external power supply system to provide an energy source, and it is also unable to monitor the vehicle's insulation needs in real time.

[0071] In the related technology, the thermal insulation heating technology is also mentioned in the scheduled heating function. If the temperature of the power battery reaches the preset temperature value earlier than the heating stop time or when the preset heating target temperature is reached and the vehicle is not powered on within a certain preset time, the thermal insulation heating will be turned on to realize the heating process of the power battery according to the user's needs.

[0072] However, this technology requires users to make an appointment for heating before the insulation and heating function can be turned on. It is unable to monitor the vehicle's insulation needs in real time and meet customer vehicle needs without wasting battery power.

[0073] Based on the above problems, the present invention proposes a battery heating method, which is mainly aimed at the power battery management system and equipped with a patrol function, that is, the battery management system can collect the temperature of the single cell. Even in the dormant state, the system can be awakened regularly and then collect the temperature of the single cell for analysis. The battery management system performs patrol inspections 24 hours a day in the low-voltage state, and regularly determines the power battery temperature T * Whether it is within the set temperature range, if the conditions are met, a request for high voltage is sent to the vehicle controller. If the vehicle controller determines that the user needs to use the vehicle, it allows the battery to be high voltage. The battery does not need to be plugged in externally, and uses its own power to heat the battery cooling circuit through the heater and water pump of the thermal management system, thereby completing the insulation and heating function.

[0074] like Figure 1 As shown, the battery heating method includes the following steps:

[0075] In step S101, the current temperature of each single cell in the power battery pack is collected.

[0076] The current temperature of the single cell can be measured and collected using a temperature sensor (such as a thermistor) in the relevant technology.

[0077] Furthermore, in some embodiments, collecting the current temperature of each single cell in the power battery pack includes: obtaining the energy consumption control requirements of the current battery management system, the current ambient temperature and weather information within a preset time period; determining the collection period of the temperature of each single cell in the power battery pack according to the energy consumption control requirements, the current ambient temperature and weather information within a preset time period; and collecting the current temperature of each single cell in the power battery pack based on the collection period.

[0078] Among them, the preset time length can be a time length pre-set by a technician in this field, or a time length obtained through a limited number of experiments, or a time length obtained through a limited number of computer simulations. No specific limitation is made here. Preferably, the preset time length in this embodiment is set to 24 hours.

[0079] Specifically, the collection period t1 of the temperature of each single cell in the power battery pack is determined according to the energy consumption control requirements of the current battery management system, the current ambient temperature and the weather information within a preset time (i.e., the next 24 hours), and an alarm is set for regular reminders. Based on this collection period, the current temperature of each single cell in the power battery pack can be collected.

[0080] It should be noted that in order to further reduce energy consumption, only one set of temperature data of effective single cells needs to be collected for diagnosis after the timed reminder, so that the needs of 24-hour patrol monitoring can be met under low energy consumption.

[0081] In step S102, if the current temperature is within the preset temperature range, the vehicle controller is awakened and a high voltage power-on request is sent to the vehicle controller.

[0082] Specifically, when the current temperature of each single battery cell reaches the set temperature range (T2, T1), the battery management system is triggered to enter the wake-up state (i.e. wake up the vehicle controller) and send a high-voltage power-on request to the vehicle controller through a network management message to request high voltage.

[0083] In step S103, if a high-voltage power-on instruction is received from the vehicle controller based on the high-voltage power-on request feedback, high-voltage power-on is performed, and a heating request is sent to the thermal management system to heat the power battery pack through the thermal management system.

[0084] Specifically, after receiving the high-voltage power-on request, the vehicle controller will further determine the need for thermal insulation and heating, and send a permission flag to the battery management system. If the battery management system receives a high-voltage power-on instruction based on the high-voltage power-on request feedback from the vehicle controller, it will perform the high-voltage power-on operation and send the heating request to the thermal management system. The thermal management system will make a judgment again and, if allowed, heat the power battery pack through the thermal management system, that is, circulate the water-cooling and water-heating circuit of the battery through the heating source water pump to meet the thermal insulation and heating requirements.

[0085] Furthermore, in some embodiments, after sending a heating request to the thermal management system to heat the power battery pack through the thermal management system, it also includes: collecting the heated temperature, charge state and power battery pack state of each single cell in the power battery pack; based on the heated temperature of each single cell, judging whether the minimum temperature is greater than a preset threshold, or whether the charge state is less than a preset charge state, or whether the power battery pack state is a fault state, or whether a stop heating instruction is received; if the minimum temperature is greater than the preset threshold, or the charge state is less than the preset charge state, or the power battery pack state is a fault state, or a stop heating instruction is received, then stop heating the power battery pack.

[0086] Among them, the preset threshold value is used as the calibration value of the lowest temperature of each single battery cell after heating. It can be a value pre-set by the user, a value obtained through a limited number of experiments, or a value obtained through a limited number of computer simulations. No specific limitation is made here; the preset state of charge is used as the calibration value of the state of charge of each single battery cell. Similarly, no specific limitation is made here.

[0087] Specifically, after heating the power battery pack, the thermal insulation and heating function can be exited when one of the following conditions is met: when the battery management system collects the effective minimum temperature of each single cell in the power battery pack after heating and it is greater than the preset threshold value T3, or the state of charge is less than the preset state of charge SOC2, or the power battery pack itself is in a fault state, or when a stop heating instruction is received from the vehicle controller, that is, a network management message from the vehicle controller that does not allow heating and a message from the thermal management system that heating cannot be allowed, then the power battery pack is stopped from being heated and the thermal insulation and heating function is exited.

[0088] Furthermore, in some embodiments, after stopping heating the power battery pack, it also includes: collecting the temperature of each single cell in the power battery pack after stopping heating, and storing the temperature of each single cell after stopping heating; controlling the current battery management system to enter a sleep state.

[0089] It is understandable that after stopping heating the power battery pack, the battery management system prepares to enter a dormant state, collects and stores the temperature of each single cell in the power battery pack after stopping heating, and then controls the battery management system to go into dormancy.

[0090] Furthermore, in some embodiments, before collecting the current temperature of each single cell in the power battery pack, it also includes: collecting the temperature of each single cell in the power battery pack before stopping heating, and storing the temperature of each single cell before stopping heating; controlling the current battery management system to enter a sleep state.

[0091] It can be understood that the battery heating method proposed in the embodiment of the present invention can monitor the real-time insulation needs for 24 hours when the battery management system is in sleep mode. Therefore, when the current battery management system is preparing to enter the sleep mode, the temperature of each single cell in the power battery pack before heating is stopped is collected and stored, and then the current battery management system is controlled to enter the sleep mode.

[0092] To facilitate those skilled in the art to further understand the battery heating method provided in the embodiment of the present invention, Figure 2 and Figure 3 Provide further explanation.

[0093] like Figure 2 As shown, Figure 2 This is a flow chart of turning on the heat preservation and heating function according to an embodiment of the present invention, comprising the following steps:

[0094] Step S201, the battery management system prepares to sleep.

[0095] Step S202, storing the temperature T of each single cell at this time x .

[0096] Step S203, controlling the battery management system to enter a sleep state.

[0097] Step S204, the battery management system is automatically reminded to collect the temperature T of each single cell of a group at time t1. * .

[0098] Step S205, determine whether T2<T * <T1. If not satisfied, return to step S203, otherwise, execute step S206.

[0099] Step S206, waking up the vehicle controller through a network message and requesting high voltage power-on.

[0100] Step S207, the vehicle controller allows high voltage to be powered on.

[0101] Step S208, sending a heating demand to a thermal management system for heating.

[0102] Step S209, enter the heating and heat preservation function.

[0103] Furthermore, if Figure 3 As shown, Figure 3 This is a flow chart of exiting the heat preservation and heating function according to an embodiment of the present invention, comprising the following steps:

[0104] Step S301: If the effective minimum temperature T of each single cell after heating *>T3, or the state of charge SOC<SOC2, or there is a fault in the power battery pack, or the vehicle controller does not allow heating, or the thermal management system does not allow heating. If any of the conditions is met, step S302 can be entered.

[0105] Step S302, exit the heat preservation and heating function.

[0106] Step S303: the battery management system prepares to sleep.

[0107] Step S304, storing the temperature T of each single cell at this time x .

[0108] Step S305, controlling the battery management system to enter a sleep state.

[0109] According to the battery heating method proposed in the embodiment of the present invention, by collecting the current temperature of each single cell in the power battery pack, and when the current temperature is in the preset temperature range, the vehicle controller is awakened, and a high-voltage power-on request is sent to the vehicle controller. When the high-voltage power-on instruction based on the high-voltage power-on request feedback is received from the vehicle controller, high-voltage power-on is performed, and a heating request is sent to the thermal management system to heat the power battery pack through the thermal management system. In this way, the problem that the vehicle battery insulation needs to be monitored in real time at this stage is solved. When the user is not using the vehicle, the battery manager will regularly inspect the battery temperature, determine the need for low-temperature insulation heating, and automatically heat the power battery, so that the power battery temperature can still meet the startup requirements when the user is using the vehicle, thereby improving the user experience.

[0110] Next, a battery heating device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0111] Figure 4 Schematic diagram of a battery heating device according to an embodiment of the present invention.

[0112] like Figure 4 As shown, the battery heating device 10 includes: a collection module 100 , a sending module 200 and a heating module 300 .

[0113] The acquisition module 100 is used to acquire the current temperature of each single cell in the power battery pack;

[0114] The sending module 200 is used to wake up the vehicle controller and send a high-voltage power-on request to the vehicle controller when the current temperature is within a preset temperature range; and

[0115] The heating module 300 is used to perform high voltage power-on upon receiving a high voltage power-on instruction based on the high voltage power-on request feedback from the vehicle controller, and send a heating request to the thermal management system to heat the power battery pack through the thermal management system.

[0116] Furthermore, in some embodiments, after sending a heating request to the thermal management system so as to heat the power battery pack through the thermal management system, the heating module 300 is further configured to:

[0117] Collect the heated temperature, state of charge and power battery pack status of each single cell in the power battery pack;

[0118] Based on the heated temperature of each single cell, determine whether the lowest temperature is greater than a preset threshold, or whether the state of charge is less than a preset state of charge, or whether the power battery pack is in a fault state, or whether a stop heating instruction is received;

[0119] If the minimum temperature is greater than a preset threshold, or the state of charge is less than a preset state of charge, or the power battery pack is in a fault state, or a stop heating instruction is received, heating of the power battery pack is stopped.

[0120] Furthermore, in some embodiments, after stopping heating the power battery pack, the heating module 300 is further used to:

[0121] Collecting the temperature of each single cell in the power battery pack after heating is stopped, and storing the temperature of each single cell after heating is stopped;

[0122] Control the current battery management system to enter sleep state.

[0123] Furthermore, in some embodiments, before collecting the current temperature of each single cell in the power battery pack, the collection module 100 is further used to:

[0124] Collecting the temperature of each single cell in the power battery pack before stopping heating, and storing the temperature of each single cell before stopping heating;

[0125] Control the current battery management system to enter sleep state.

[0126] Furthermore, in some embodiments, the acquisition module 100 is specifically used to:

[0127] Obtain the energy consumption control requirements of the current battery management system, the current ambient temperature, and weather information within a preset time period;

[0128] Determine the temperature collection period of each single cell in the power battery pack according to the energy consumption control requirements, the current ambient temperature and the weather information within a preset time period;

[0129] The current temperature of each single cell in the power battery pack is collected based on the collection cycle.

[0130] It should be noted that the above explanations and descriptions of the battery heating method embodiment are also applicable to the battery heating device of this embodiment, and will not be repeated here.

[0131] According to the battery heating device proposed in the embodiment of the present invention, by collecting the current temperature of each single cell in the power battery pack, and when the current temperature is in the preset temperature range, the vehicle controller is awakened, and a high-voltage power-on request is sent to the vehicle controller. When the high-voltage power-on instruction based on the high-voltage power-on request feedback is received from the vehicle controller, high-voltage power-on is performed, and a heating request is sent to the thermal management system to heat the power battery pack through the thermal management system. In this way, the problem that the vehicle battery insulation needs to be monitored in real time at this stage is solved. When the user is not using the vehicle, the battery manager will regularly inspect the battery temperature, determine the need for low-temperature insulation heating, and automatically heat the power battery, so that the power battery temperature can still meet the startup requirements when the user is using the vehicle, thereby improving the user experience.

[0132] Figure 5 A schematic diagram of the structure of a vehicle provided in an embodiment of the present invention. The vehicle may include:

[0133] A memory 501 , a processor 502 , and a computer program stored in the memory 501 and executable on the processor 502 .

[0134] When the processor 502 executes the program, the battery heating method provided in the above embodiment is implemented.

[0135] Furthermore, the vehicle also includes:

[0136] The communication interface 503 is used for communication between the memory 501 and the processor 502 .

[0137] The memory 501 is used to store computer programs that can be executed on the processor 502 .

[0138] The memory 501 may include a high-speed RAM (Random Access Memory) memory, and may also include a non-volatile memory, such as at least one disk memory.

[0139] If the memory 501, the processor 502 and the communication interface 503 are implemented independently, the communication interface 503, the memory 501 and the processor 502 can be connected to each other through a bus and communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0140] Optionally, in a specific implementation, if the memory 501, the processor 502 and the communication interface 503 are integrated on a chip, the memory 501, the processor 502 and the communication interface 503 can communicate with each other through an internal interface.

[0141] The processor 502 may be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present invention.

[0142] An embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the above-mentioned battery heating method is implemented.

[0143] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A battery heating method, characterized in that: The following steps are involved: Collect the current temperature of each single cell in the power battery pack; If the current temperature is within the preset temperature range, the vehicle controller is awakened and a high voltage power-on request is sent to the vehicle controller; as well as If a high-voltage power-on instruction is received from the vehicle controller based on the high-voltage power-on request feedback, high-voltage power-on is performed, and a heating request is sent to the thermal management system to heat the power battery pack through the thermal management system.

2. The method according to claim 1, characterized in that After sending the heating request to the thermal management system so as to heat the power battery pack through the thermal management system, the method further includes: Collecting the heated temperature, state of charge and power battery pack state of each single cell in the power battery pack; Based on the heated temperature of each single cell, determining whether the lowest temperature is greater than a preset threshold, or whether the state of charge is less than a preset state of charge, or whether the power battery pack is in a fault state, or whether a stop heating instruction is received; If the minimum temperature is greater than the preset threshold, or the state of charge is less than the preset state of charge, or the power battery pack is in the fault state, or the stop heating instruction is received, heating of the power battery pack is stopped.

3. The method according to claim 2, characterized in that After stopping heating the power battery pack, the method further includes: Collecting the temperature of each single cell in the power battery pack after heating is stopped, and storing the temperature of each single cell after heating is stopped; Control the current battery management system to enter sleep state.

4. The method according to claim 1, characterized in that: Before collecting the current temperature of each single cell in the power battery pack, it also includes: Collecting the temperature of each single cell in the power battery pack before stopping heating, and storing the temperature of each single cell before stopping heating; Control the current battery management system to enter a dormant state.

5. The method according to claim 4, characterized in that The collecting of the current temperature of each single cell in the power battery pack includes: Obtaining the energy consumption control requirements of the current battery management system, the current ambient temperature and weather information within a preset time period; Determine a collection period of the temperature of each single cell in the power battery pack according to the energy consumption control requirement, the current ambient temperature and the weather information within the preset time period; The current temperature of each single cell in the power battery pack is collected based on the collection cycle.

6. A battery heating device, characterized in that: include: The acquisition module is used to collect the current temperature of each single cell in the power battery pack; A sending module, used for waking up the vehicle controller and sending a high-voltage power-on request to the vehicle controller when the current temperature is within a preset temperature range; as well as The heating module is used to perform high-voltage power-on upon receiving a high-voltage power-on instruction from the vehicle controller based on the high-voltage power-on request feedback, and send a heating request to the thermal management system to heat the power battery pack through the thermal management system.

7. The device according to claim 6, characterized in that After sending the heating request to the thermal management system so as to heat the power battery pack through the thermal management system, the heating module is further used to: Collecting the heated temperature, state of charge and power battery pack state of each single cell in the power battery pack; Based on the heated temperature of each single cell, determining whether the lowest temperature is greater than a preset threshold, or whether the state of charge is less than a preset state of charge, or whether the power battery pack is in a fault state, or whether a stop heating instruction is received; If the minimum temperature is greater than the preset threshold, or the state of charge is less than the preset state of charge, or the power battery pack is in the fault state, or the stop heating instruction is received, heating of the power battery pack is stopped.

8. The device according to claim 7, characterized in that After stopping heating the power battery pack, the heating module is further used to: Collecting the temperature of each single cell in the power battery pack after heating is stopped, and storing the temperature of each single cell after heating is stopped; Control the current battery management system to enter sleep state.

9. A vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the battery heating method according to any one of claims 1 to 5.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the battery heating method according to any one of claims 1 to 5.

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