Battery heating control method and device, electronic device, vehicle and storage medium

Abstract

The invention discloses a battery heating control method and device, an electronic device, a vehicle and a storage medium. The battery heating control method comprises the steps of obtaining a heating control strategy corresponding to a current working condition; and controlling the power of heating equipment according to the heating control strategy and the operation parameters of the vehicle, so that the temperature of a battery of the vehicle is within a preset range. The heating control strategy is a control strategy for the heating equipment when the heating effect of the heating equipment is optimal under the corresponding working condition and the battery can be rapidly heated. In this way, the power of the heating equipment is controlled based on the heating control strategy corresponding to the current working condition and the operation parameters of the vehicle, and heating of the battery is achieved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and more specifically, to a battery heating control method, a battery heating control device, an electronic device, a vehicle, and a non-volatile computer-readable storage medium. Background Art

[0002] In daily use, vehicles may be in a low-temperature environment for a long time. In a low-temperature environment, the battery's discharge capacity is weak, which may affect the functional use and performance of the entire vehicle. Therefore, how to increase the battery temperature in a low-temperature environment and maintain the battery's discharge capacity is an urgent problem to be solved. Summary of the invention

[0003] Embodiments of the present application provide a battery heating control method, a battery heating control device, an electronic device, a vehicle, and a non-volatile computer-readable storage medium.

[0004] The battery heating control method of the embodiment of the present application includes obtaining a heating control strategy corresponding to the current operating conditions; and controlling the power of the heating device according to the heating control strategy and the operating parameters of the vehicle so that the temperature of the battery of the vehicle is within a preset range.

[0005] The battery heating control device of the embodiment of the present application includes an acquisition module and a control module. The acquisition module is used to acquire the heating control strategy corresponding to the current working condition. The control module is used to control the power of the heating device according to the heating control strategy and the operating parameters of the vehicle so that the temperature of the battery of the vehicle is within a preset range.

[0006] The electronic device of the embodiment of the present application includes a processor, a memory and a computer program, wherein the computer program is stored in the memory and executed by the processor, and the computer program includes instructions for executing a battery heating control method. The battery heating control method includes obtaining a heating control strategy corresponding to a current working condition; and controlling the power of a heating device according to the heating control strategy and operating parameters of a vehicle so that the temperature of the battery of the vehicle is within a preset range.

[0007] The vehicle of the embodiment of the present application includes a heating device, a battery and an electronic device. The electronic device includes a processor, a memory and a computer program, wherein the computer program is stored in the memory and executed by the processor, and the computer program includes instructions for executing a battery heating control method. The battery heating control method includes obtaining a heating control strategy corresponding to a current operating condition; controlling the power of the heating device according to the heating control strategy and the operating parameters of the vehicle so that the temperature of the battery of the vehicle is within a preset range.

[0008] The non-volatile computer-readable storage medium of the embodiment of the present application includes a computer program, and when the computer program is executed by a processor, the processor executes a battery heating control method. The battery heating control method includes obtaining a heating control strategy corresponding to a current operating condition; and controlling the power of a heating device according to the heating control strategy and operating parameters of a vehicle so that the temperature of the battery of the vehicle is within a preset range.

[0009] The battery heating control method, battery heating control device, electronic device, vehicle and non-volatile computer-readable storage medium of the embodiment of the present application obtain a heating control strategy corresponding to the current working condition; control the power of the heating device according to the heating control strategy and the operating parameters of the vehicle so that the temperature of the battery of the vehicle is within a preset range. In this way, the power of the heating device is controlled based on the heating control strategy corresponding to the current working condition and the operating parameters of the vehicle to achieve heating of the battery.

[0010] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0012] Figure 1 is a partial structural schematic diagram of a vehicle according to some embodiments of the present application;

[0013] Figure 2 is a schematic diagram of a module of an electric drive system of a vehicle according to certain embodiments of the present application;

[0014] Figure 3 is a flow chart of a battery heating control method according to certain embodiments of the present application;

[0015] Figure 4 is a flow chart of a battery heating control method according to certain embodiments of the present application;

[0016] Figure 5 is a schematic diagram of a scenario of a battery heating control method according to certain embodiments of the present application;

[0017] Figure 6 is a flow chart of a battery heating control method according to certain embodiments of the present application;

[0018] Figure 7 is a schematic diagram of a scenario of a battery heating control method according to certain embodiments of the present application;

[0019] Figure 8is a flow chart of a battery heating control method according to certain embodiments of the present application;

[0020] Fig. 9 is a flow chart of a battery heating control method according to certain embodiments of the present application;

[0021] Fig.10 is a flow chart of a battery heating control method according to certain embodiments of the present application;

[0022] Fig.11 is a schematic diagram of a scenario of a battery heating control method according to certain embodiments of the present application;

[0023] Fig.12 is a flow chart of a battery heating control method according to certain embodiments of the present application;

[0024] Fig.13 is a flow chart of a battery heating control method according to certain embodiments of the present application;

[0025] Fig.14 is a module schematic diagram of a battery heating control device according to certain embodiments of the present application;

[0026] Fig.15 is a partial structural schematic diagram of a vehicle according to some embodiments of the present application;

[0027] Fig.16 It is a schematic diagram of the connection status of a non-volatile computer-readable storage medium and a processor in certain embodiments of the present application. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present application, and cannot be understood as limiting the embodiments of the present application.

[0029] The embodiment of the present application provides a battery heating control method, which will be described in detail below:

[0030] See also Figure 1 and Figure 2 The vehicle 100 provided in the embodiment of the present application includes a heating device and a battery 20 , and the heating device can heat the battery 20 .

[0031] Specifically, the vehicle 100 includes a heating device and a battery 20. The heating device can heat the battery 20, and the battery 20 can supply power to the heating device. The motor assembly 40 can include a heating module 41, so the motor assembly 40 can also be used to heat the battery. For example, the heating device includes a heating device 30 and a motor assembly 40. Among them, the heating device 30 is an additional device installed on the vehicle 100, such as a positive temperature coefficient (PTC) heater. The PTC heater can be a PTC thermistor. When the heating device is powered on, the heating device can generate heat. The motor assembly 40 can be heated by its own heating module 41. The heating module 41 is usually composed of components such as a heating wire or a PTC thermistor. When the heating module 41 is powered on, the heating module 41 can generate heat. The power of the heating wire or the PTC thermistor can be controlled by adjusting the current or voltage to achieve the purpose of heating.

[0032] The vehicle 100 may also include a battery management system 50 (BMS), a vehicle control system 60 (PDU) (such as a processor 80), an electric drive system 70, a control circuit and a heat conduction loop. The electric drive system 70 includes a power switch module 71 and a motor assembly 40. The heat conduction loop includes a water pump and a heat conduction medium, and the heat conduction loop is connected to the battery 20, the heating device 30 and the electric drive system 70. The heating module 41 and the heating device 30 can heat the heat conduction medium in the heat conduction loop, and the water pump can be used to drive the heat conduction medium to flow in the heat conduction loop, so that the heat conduction medium after the temperature is increased can transfer heat energy through the heat conduction loop, thereby increasing the temperature of the battery 20 and other components.

[0033] See also Figure 3 , the embodiment of the present application provides a battery heating control method, the battery heating control method comprising:

[0034] Step 011: Obtain the heating control strategy corresponding to the current working condition;

[0035] Specifically, the battery heating control method of the present application is applied to a vehicle, and the vehicle includes a heating device and a battery, and the heating device is used to heat the battery. The corresponding heating control strategy can be set according to different working conditions. The heating control strategy is the control strategy for the heating device when the heating effect of the heating device is optimal under the corresponding working condition, so that the battery can be quickly heated up. Therefore, the heating control strategies corresponding to different working conditions may be different. For example, the current working condition includes a charging condition and a discharging condition. Under the charging condition, the vehicle can be connected to an external charging device, and the energy source at this time is an external charging device. Therefore, the heating control strategy at this time can be to control the power of the heating device based on the maximum power of the heating device to maximize the heating rate of the heating device. Under the discharging condition, the energy source of the vehicle is the battery of the vehicle. Therefore, the heating control strategy at this time can be to control the power of the heating device in a targeted manner according to the current allowable discharge power of the battery.

[0036] The current operating condition can be determined based on the current operating parameters of the vehicle. For example, the direction of the bus current, the vehicle discharge power, or the charging gun connection status can be used to determine whether the vehicle is in a charging condition or a discharging condition. After determining the current operating condition, the heating control strategy corresponding to the current operating condition can be obtained.

[0037] Step 012: Control the power of the heating device according to the heating control strategy and the operating parameters of the vehicle so that the temperature of the battery of the vehicle is within a preset range.

[0038] Specifically, after the heating control strategy is determined, the power of the heating device can be controlled in a targeted manner according to the heating control strategy and the operating parameters of the vehicle.

[0039] The following is an example of a motor component as the heating device:

[0040] In one embodiment, the operating parameters of the vehicle include a preset heating power of the motor assembly, where the preset heating power is the power when the motor assembly generates more heat, for example, the preset heating power is the maximum power of the motor assembly. The heating control strategy is a heating control strategy corresponding to the charging condition, and the heating power of the motor assembly can be controlled according to the preset heating power to maximize the heating efficiency of the motor assembly.

[0041] In another embodiment, the operating parameters of the vehicle include the current allowable discharge power of the battery, and the heating control strategy is a heating control strategy corresponding to the discharge condition, and the heating power of the motor assembly can be controlled according to the current allowable discharge power of the battery. For example, the operating parameters of the vehicle also include a preset power loss, and the preset power loss is the power loss of the motor assembly itself when performing the heating function. First, when the current allowable discharge power is greater than the preset power loss, the heating power of the motor assembly can be controlled according to the preset power loss. When the current allowable discharge power at the next moment is greater than the preset power loss, the heating power of the motor assembly is increased according to the preset step size and the preset power loss, so as to continuously increase the heating power of the motor assembly when the battery discharge power allows, thereby facilitating the improvement of the heating rate of the battery and ensuring that the battery can be heated up quickly.

[0042] It can be understood that the heating control strategy is a control strategy for the heating device when the heating effect of the heating device is optimal under the corresponding working conditions, so that the battery can be heated up quickly. Therefore, after controlling the power of the heating device in real time based on the heating control strategy corresponding to the current working conditions, the heating effect of the heating device is better, the temperature of the battery can be gradually increased, and finally within the preset range. The preset range may be the temperature range when the battery can work safely, or it may be the temperature range when the battery performance is higher. In this way, the vehicle can dynamically adjust the heating value of the heating device in low temperature environments, lower temperature scenarios and different working conditions to ensure that the vehicle has a higher heating value under different working conditions, so as to quickly increase the temperature of the battery, thereby improving the performance and life of the battery in low temperature environments.

[0043] At the same time, since the heating device will heat the heat-conducting medium, the heat-conducting medium can flow to different positions of the vehicle through the heat-conducting circuit. Therefore, after the heating device is working, the temperature of other components of the vehicle except the battery can also be controlled and adjusted in real time, so that other components of the vehicle can also gradually heat up, thereby facilitating the improvement of the working performance of each component at low temperatures.

[0044] Of course, the heating device may also be an external heating device, such as an external motor device. A connection end may be provided on the vehicle. After the connection end is connected to the motor device, the battery of the vehicle may be heated by the motor device.

[0045] The battery heating control method of the embodiment of the present application can obtain the heating control strategy corresponding to the current working condition in real time. The heating control strategy is a control strategy for the heating device when the heating effect of the heating device is optimal under the corresponding working condition, so that the battery can be quickly heated up. Then, the power of the heating device can be controlled according to the heating control strategy and the operating parameters of the vehicle, so that the power of the heating device matches the current working condition and the heating effect of the heating device is better, so that the temperature of the battery can be gradually increased and finally within the preset range. In this way, after the heating device is controlled to operate based on the heating control strategy corresponding to the current working condition, the battery can be quickly and effectively heated up, so that even in a low temperature environment, the temperature of the battery can be gradually increased until the temperature of the battery is within the preset range, so as to improve the vehicle power and vehicle performance in a low temperature environment.

[0046] See also Figure 4 In some embodiments, step 012: controlling the power of the heating device according to the heating control strategy and the operating parameters of the vehicle includes:

[0047] Step 0121: determining a target heating device among the heating devices according to a heating control strategy, where the target heating device is at least one of a motor component of a vehicle and a heating device of the vehicle;

[0048] Step 0122: Control the heating power of the target heating device according to the operating parameters of the vehicle.

[0049] Specifically, the heating device includes at least one of a heating device and a motor assembly, for example, the heating device is a heating device, a motor assembly, or a heating device and a motor assembly. The motor assembly also has a driving function to drive the vehicle to run, so the vehicle has a high control accuracy over the operation of the motor assembly, so that the vehicle can flexibly control the heating power of the motor assembly, that is, the vehicle can control the motor assembly to run at multiple powers. The heating device is an additional device installed on the vehicle, and the heating device can only run at a preset power. The vehicle only controls the opening and closing of the heating device. After the heating device is turned on, it heats the battery with the preset power. At this time, the heating device can be controlled to start according to the operating parameters, and the operating parameters are the starting parameters. Alternatively, the heating device can run at multiple powers, and the vehicle can control the heating device to run according to multiple powers. At this time, the heating power of the heating device can also be controlled in a targeted manner according to the heating control strategy and the operating parameters of the vehicle. In this way, if it is determined according to the heating control strategy that the heating device needs to be controlled to heat the battery, the heating power of the heating device can also be controlled in a targeted manner according to the operating parameters of the vehicle.

[0050] The heating device and the motor assembly have their own advantages. For example, the vehicle may include a backup energy storage device that can also supply power at low temperatures, and the backup energy storage device can supply power to the heating device, so that the heating device can also provide a large amount of heat in a low temperature environment. When the temperature of the battery is within the preset range, the discharge power of the battery is large, so the power input from the battery to the motor assembly is also large, and the power of the motor assembly to heat the battery is also large, that is, when the temperature of the battery is within the preset range, the motor assembly can provide a large amount of heat. At the same time, the vehicle has a high control accuracy over the operation of the motor assembly, so that the vehicle can flexibly control the heating power of the motor assembly, so the control flexibility of the motor assembly is high. Therefore, the heating control strategy can determine the heating device that needs to be started at different temperatures according to the corresponding advantages of the heating device and the motor assembly. For example, when the current battery temperature is low, the heating device can be used for heating so that the battery can be heated quickly. When the current battery temperature gradually increases to a temperature corresponding to a high battery performance, the motor assembly can be used for heating to reduce the energy consumption of the heating device when it is running, and at the same time, it can also ensure that the current battery temperature is maintained near the temperature corresponding to a high battery performance as much as possible.

[0051] Of course, in some cases, the backup energy storage device can also heat the motor assembly, so that the motor assembly can provide a large amount of heat in a low temperature environment. In some cases, the vehicle can also accurately control the power of the heating device, so that the control flexibility of the heating device is also high. Therefore, the heating control strategy can be determined according to the specific performance of the vehicle's heating device and motor assembly, so as to improve the flexibility of setting the heating control strategy.

[0052] Therefore, the target heating device can be determined in the heating device according to the heating control strategy. For example, the heating control strategy includes the target heating device of the battery at different temperatures. At this time, the current temperature of the battery can be obtained, and the target heating device can be determined in combination with the current temperature and the heating control strategy. Among them, the target heating device includes at least one of the motor assembly and the heating device, that is, the target heating device can be the motor assembly, the heating device, or the motor assembly and the heating device.

[0053] After determining the target heating device, the required operating parameters can be determined according to the current working condition and the target heating device, and the heating power of the target heating device can be controlled according to the operating parameters. For example, the current working condition is the charging condition, and the target heating device is determined to be the motor component according to the heating control strategy, and the corresponding operating parameter at this time is the preset heating power. Then, the preset heating power of the motor component can be obtained at this time, and the heating power of the motor component can be controlled according to the preset heating power.

[0054] The step of controlling the heating power of the motor assembly can be based on Figure 5 Implementation, such as Figure 5As shown, the horizontal axis in the coordinate system is the direct axis current, and the vertical axis is the quadrature axis current. Each coordinate point in the coordinate system can be considered as a current point. According to the horizontal and vertical coordinates of the current point, the current combination corresponding to the point can be confirmed, that is, the combination of AC current and DC current. The operation of the motor component can be controlled according to the AC current and DC current. Different current points on the same torque curve have the same torque, and different current points have different powers. The intersection of the optimal energy consumption curve and the torque curve is the current point corresponding to the minimum energy consumption when the motor component outputs the torque corresponding to the torque curve.

[0055] First, the target driving torque can be determined based on the driving function of the motor assembly, and the torque curve corresponding to the target driving torque can be obtained. Then the reference point is determined according to the intersection of the energy consumption optimal curve and the torque curve corresponding to the driving torque. Then the motor assembly can be controlled to operate according to the AC combination corresponding to the reference point, so that the motor assembly can output the target driving torque with low energy consumption. In the case where the efficiency of the motor assembly needs to be adjusted, the reference point can be used as a basis to slide left and right on the torque curve corresponding to the target driving torque until the target current point at which the corresponding power meets the adjustment requirements is obtained, and the motor assembly is controlled to operate according to the target current point, so that the efficiency of the motor assembly can be controlled. For example, the reference point is point B and the target current point is point E. At the same time, the target current point is still on the torque curve corresponding to the target driving torque. Therefore, after the motor assembly is controlled to operate according to the target current point, the output torque of the motor assembly is still the target driving torque, so that the driving function of the motor assembly can operate normally.

[0056] In this way, the target heating device can be accurately determined according to the heating control strategy, so that under the current operating conditions, the target heating device can quickly and effectively heat the battery, ensuring that the temperature of the battery can rise quickly.

[0057] In addition, the vehicle of the present application is also compatible with different forms of external heating devices. Under certain working conditions, the vehicle can be heated by the heating device to increase system power and speed and improve the system usage experience. The vehicle can also use the heating device and the motor assembly for heating at the same time, so that the temperature threshold range that the heating device can adjust is wider.

[0058] See also Figure 6 In some embodiments, when the current working condition is a discharge working condition, step 0121: determining a target heating device according to a heating control strategy includes:

[0059] Step 01211: when the current battery temperature is less than a first temperature threshold, determining that the target heating device is a heating device;

[0060] Step 01212: when the current battery temperature is greater than or equal to the first temperature threshold and less than the second temperature threshold, determining that the target heating device is a heating device and a motor assembly;

[0061] Step 01213: when the current battery temperature is greater than or equal to the second temperature threshold and less than the third temperature threshold, determining that the target heating device is a motor assembly;

[0062] Step 01214: When the current battery temperature is greater than or equal to the third temperature threshold, determine that there is no target heating device.

[0063] Specifically, please combine Figure 7 In the figure, T1 represents the time point when the current battery temperature reaches the minimum temperature of battery performance, T2 represents the time point when the current battery temperature reaches the optimal temperature of battery performance, and T3 represents the time point when the current battery temperature reaches the maximum temperature of battery performance. The line segment in the fourth quadrant represents the target heating device used during this time period. Among them, the lowest temperature allowed by the battery is the lowest temperature at which the battery can be discharged to the outside, but at this time the battery enters the protection mode, the battery cannot release power stably, and may even stop discharging. The lowest temperature of battery performance is the lowest temperature at which the battery can be discharged stably to the outside. The optimal temperature of battery performance is the optimal temperature at which the battery can discharge continuously and stably to the outside. The highest temperature of battery performance is the highest temperature at which the battery can be discharged to the outside, and the discharge power of the battery is the largest at this time.

[0064] The allowable discharge power of the battery is greatly reduced in a low temperature environment. The discharge power curve method of the battery at different temperatures and the battery discharge performance at different temperatures can be determined through pre-calibration and actual testing processes. Then, the first temperature threshold, the second temperature threshold and the third preset threshold can be set according to the relationship between temperature and battery discharge curve. Among them, the first temperature threshold is the lowest temperature of battery performance, the second temperature threshold is the best temperature of battery performance, and the third preset threshold is the highest temperature of battery performance. The first temperature threshold, the second temperature threshold and the third temperature threshold corresponding to different batteries can be pre-set, and the first temperature threshold, the second temperature threshold and the third temperature threshold can be stored in a table. In actual use, the first temperature threshold, the second temperature threshold and the third temperature threshold can be determined by looking up the table. The preset temperature interval can be determined according to the third preset threshold. For example, the corresponding temperature interval with higher performance is selected near the third preset threshold as the preset temperature interval, so that the temperature of the battery is maintained in the temperature interval with higher performance, thereby ensuring the high performance of the battery.

[0065] When the current battery temperature is lower than the minimum allowable battery temperature, the battery cannot supply power. When the current battery temperature is higher than the minimum allowable battery temperature but lower than the first temperature threshold, it can be considered that the temperature is too low and the battery cannot supply power to the outside stably. Therefore, when the current battery temperature is lower than the first temperature threshold, a backup energy device is required to supply power. Therefore, the target heating device can be determined based on the heating device connected to the backup energy device. The backup energy device is usually only connected to the heating device. Therefore, the target heating device can be determined as the heating device at this time. Of course, if the backup energy device can also be connected to the motor assembly, then the target heating device can also include the motor assembly at this time.

[0066] When the current battery temperature is greater than or equal to the first temperature threshold and less than the second temperature threshold, the battery can operate normally and supply power stably. The battery can supply power to the heating device and the motor assembly respectively. Therefore, the target heating device can be determined to be the heating device and the motor assembly to maximize the power of the heating device and ensure that the battery can complete the heating at the fastest speed allowed by the current heating device.

[0067] When the current battery temperature is greater than or equal to the second temperature threshold and less than the third temperature threshold, the battery temperature is high, the power transmitted from the battery to the motor assembly is large, and the heating efficiency of the motor assembly to the battery is also high. Therefore, at this time, it can be determined that the target heating device includes a motor assembly to ensure that the heating efficiency of the battery is high while reducing the energy consumption of the heating device. Of course, if you want to further improve the heating efficiency of the battery, when the current battery temperature is greater than or equal to the second temperature threshold and less than the third temperature threshold, the target heating device may include a motor assembly and a heating device.

[0068] When the current battery temperature is greater than or equal to the third temperature threshold, it can be considered that the battery does not need to be heated, and the battery can even be cooled so that the current battery temperature can drop to the third temperature threshold, thereby improving the performance of the battery. Therefore, it can be confirmed that there is no target heating device at this time, and when the target power is controlled according to the operating parameters corresponding to the heating strategy, the power of the motor assembly and the heating device can be controlled to be 0, that is, the motor assembly and the heating device can be turned off.

[0069] In this way, multiple temperature thresholds can be determined according to the operating conditions of the battery at different temperatures under discharge conditions, and the corresponding target heating device can be enabled according to the temperature range in which the current battery temperature is located, so as to maximize the heating function of the heating device under different operating conditions and achieve the fastest heating efficiency and effect.

[0070] See also Figure 8In some embodiments, when the current operating condition is a parking discharge condition and the target heating device is a motor assembly, the operating parameters include the current allowable discharge power of the battery and the current heating power of the motor assembly. Step 0122: controlling the heating power of the target heating device according to the operating parameters of the vehicle includes:

[0071] Step 01221: When the current operating parameters meet the preset heating conditions corresponding to the parking discharge condition, the heating power of the motor assembly is adjusted according to the current allowable discharge power and the current heating power;

[0072] Step 01222: When the current operating parameters do not satisfy the preset heating conditions corresponding to the parking discharge condition, the heating power of the motor assembly is determined to be zero.

[0073] Specifically, it is possible to determine whether the vehicle is in a parking condition or a driving condition by the vehicle speed, the motor assembly speed and the target torque. When the current condition is a parking discharge condition, the vehicle is not connected to an external energy source, and the battery's electric energy does not need to be used for the vehicle to travel. At this time, the battery's electric energy can only be used for heating the target heating device. When the current condition is a parking discharge condition and the target heating device is used, the battery's allowable output power can be confirmed based on the current allowable discharge power, for example, the battery's allowable output power is the difference between the current allowable discharge power and the preset discharge protection threshold, or the battery's allowable output power is the current allowable discharge power. Then, based on the current heating power of the motor assembly, it is determined whether the battery's allowable output power meets the use of the motor assembly, and whether the motor assembly utilizes the battery's allowable output power to a large extent, and the heating power of the motor assembly is adjusted according to the judgment result. Therefore, the operating parameters at this time include the current allowable discharge power and the current heating power of the motor assembly.

[0074] First, it is necessary to determine whether the motor assembly has failed. If the motor assembly has not failed, the current operating parameters of the vehicle are obtained, and it is determined whether the current operating parameters meet the preset heating conditions corresponding to the parking discharge condition, so as to use the preset heating conditions corresponding to the parking discharge condition to determine whether the motor assembly can operate normally. In one embodiment, the preset heating conditions corresponding to the parking discharge condition include: the current allowable discharge power of the battery is greater than the preset power loss of the motor assembly. In another embodiment, the preset heating conditions corresponding to the parking discharge condition include: the absolute value of the difference between the current allowable discharge power of the battery and the preset discharge protection threshold is greater than the preset power loss of the motor assembly (ie | the current allowable discharge power of the battery - the preset discharge protection threshold | > the preset power loss). In this way, when the preset heating conditions are met, the motor assembly can obtain sufficient power to heat the battery, while also preventing the battery from being over-discharged to ensure battery safety.

[0075] When the current operating parameters meet the preset heating conditions corresponding to the parking discharge condition, the heating power of the motor assembly is adjusted according to the current allowable discharge power of the battery and the current heating power of the motor assembly. For example, the allowable output power of the battery is the current allowable discharge power. Then, based on the current heating power of the motor assembly, it is judged whether the allowable output power of the battery meets the use of the motor assembly, and whether the motor assembly utilizes the allowable output power of the battery to a large extent, and the heating power of the motor assembly is adjusted according to the judgment result. When the allowable output power of the battery does not meet the use of the motor assembly, the heating power of the motor assembly is reduced. When the allowable output power of the battery meets the use of the motor assembly but does not utilize the allowable output power of the battery to a large extent, the heating power of the motor assembly is increased.

[0076] At this time, the corresponding heating power adjustment strategy can be set according to the correspondence between the absolute value of the difference between the allowed discharge power and the preset discharge protection threshold and the current heating power. Then, the heating power of the motor component is adjusted according to the correspondence between the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold and the current heating power.

[0077] For example, when the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold is greater than the current heating power (i.e. |current allowed discharge power-preset discharge protection threshold|>current heating power), it can be considered that the battery's allowable output power satisfies the use of the motor assembly, but the battery's allowable output power is not utilized to a large extent. Therefore, the heating power of the motor assembly can be increased, such as increasing the heating power of the motor assembly according to the preset power loss of the motor assembly, the first preset step size and the current heating power. When the current heating power is 0, the heating power of the motor assembly is determined according to the preset power loss. When the current heating power is not 0, the heating power of the motor assembly is increased according to the first preset step size and the current heating power, that is, the sum of the first preset step size and the current heating power is used as the increased heating power of the motor assembly, so as to maximize the heating efficiency and heating effect of the motor assembly within the battery's allowable output power while preventing the battery from being over-discharged.

[0078] When the absolute value of the difference between the current allowable discharge power of the battery and the preset discharge protection threshold is less than the current heating power (i.e. |current allowable discharge power-preset discharge protection threshold|<current heating power), it can be considered that the electric energy allowed to be output by the battery at this time is insufficient for the motor assembly to continue to heat at the current heating power. At this time, the heating power can be reduced, for example, the heating power of the motor assembly can be reduced according to the first preset step and the current heating power, that is, the difference between the current heating power and the first preset step is used as the reduced heating power of the motor assembly. In this way, the heating power of the motor assembly can be adjusted in real time according to the allowable output power of the battery while preventing the battery from being over-discharged, so as to facilitate the fastest heating rate and effect of the system.

[0079] When the current operating parameters do not meet the preset heating conditions corresponding to the parking discharge condition, it can be considered that the motor component cannot work normally at this time, and the heating power of the motor component can be determined to be 0, that is, the motor component is not controlled to operate.

[0080] In this way, it is possible to determine whether to control the operation of the motor assembly according to the preset heating conditions corresponding to the parking discharge condition to prevent malfunctions during the operation of the motor assembly. When the operation of the motor assembly is confirmed to be controlled, the heating power of the motor assembly can be adjusted in real time based on the battery's allowable output power and the current heating power of the motor assembly, so as to maximize the heating function of the motor assembly under different working conditions. At the same time, the battery's allowable output power can also take into account the preset discharge protection threshold to prevent the battery from being over-discharged during the operation of the motor assembly, thereby protecting the battery safety and life.

[0081] See also Fig. 9 In some embodiments, when the current operating condition is a driving discharge condition and the target heating device is a motor assembly, the operating parameters include the current allowable discharge power of the battery, the current mechanical power of the motor assembly, and the current heating power of the motor assembly. Step 0122: controlling the heating power of the target heating device according to the operating parameters of the vehicle includes:

[0082] Step 01223: When the current operating parameters meet the preset heating conditions corresponding to the driving discharge condition, the heating power of the motor assembly is adjusted according to the current allowable discharge power, the current mechanical power and the current heating power;

[0083] Step 01224: When the current operating parameters do not satisfy the preset heating conditions corresponding to the driving discharge condition, the heating power of the motor assembly is determined to be zero.

[0084] Specifically, when the current operating condition is a driving discharge condition, the vehicle is not connected to an external energy source, so the battery needs to provide energy for both vehicle driving and heating of the target heating device. When the current operating condition is a driving discharge condition, and the target heating device is used, the current mechanical power factor of the vehicle during driving also needs to be considered. Based on the current allowable discharge power of the battery, the current mechanical power and the current heating power of the motor assembly, it can be judged whether the allowable output power of the battery meets the heating and driving functions of the motor assembly, and whether the motor assembly utilizes the allowable output power of the battery to a large extent, and the heating power of the motor assembly is adjusted according to the judgment result. Therefore, the operating parameters include the current allowable discharge power, the current mechanical power and the current heating power of the motor assembly.

[0085] First, it is necessary to determine whether the motor component has failed. In the case that the motor component has not failed, the current operating parameters of the vehicle can be obtained, and it can be determined whether the current operating parameters meet the preset heating conditions corresponding to the driving discharge condition, so as to use the preset heating conditions corresponding to the driving discharge condition to determine whether the motor component can operate normally. For example, the preset heating conditions corresponding to the driving discharge condition include that the absolute value of the difference between the current allowed discharge power and the current mechanical power is greater than the preset power loss of the motor component (i.e. |current allowed discharge power-current mechanical power|>preset power loss). For another example, the preset heating conditions corresponding to the driving discharge condition include: the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold is greater than the sum of the current mechanical power and the preset power loss of the motor component (i.e. |current allowed discharge power-preset discharge protection threshold|>|preset power loss + current mechanical power|), so as to include the preset discharge protection threshold into the consideration of the battery's allowed output power. In this way, when the preset heating conditions are met, it can be ensured that while the driving function of the motor component responds normally, the motor component can operate normally and be heated, and the battery can also be prevented from being over-discharged to ensure battery safety.

[0086] When the current operating parameters meet the preset heating conditions corresponding to the driving discharge condition, the heating power of the motor assembly is adjusted according to the current allowable discharge power, the current mechanical power and the current heating power. For example, the battery allowable output power is the current allowable discharge power. Then, based on the current heating power of the motor assembly, it is judged whether the battery allowable output power meets the driving function and heating function of the motor assembly, and whether the motor assembly utilizes the battery allowable output power to a large extent, and the heating power of the motor assembly is adjusted according to the judgment result. When the battery allowable output power does not meet the driving function and heating function of the motor assembly, the heating power of the motor assembly is reduced. When the battery allowable output power meets the driving function and heating function of the motor assembly, but does not utilize the battery allowable output power to a large extent, the heating power of the motor assembly is increased.

[0087] In some embodiments, a corresponding heating power adjustment strategy can be set according to the correspondence between the absolute value of the difference between the allowed discharge power and the preset discharge protection threshold and the sum of the current mechanical power and the current heating power. Then, the heating power of the motor assembly is adjusted according to the correspondence between the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold (i.e., the allowed output power of the battery) and the sum of the current mechanical power and the current heating power.

[0088] For example, when the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold is greater than the sum of the current mechanical power and the current heating power (i.e., |current allowed discharge power-preset discharge protection threshold|>|current heating power+current mechanical power|), it can be considered that the battery allowable output power satisfies the driving function and heating function of the motor assembly, but the battery allowable output power is not utilized to a large extent. Therefore, the heating power of the motor assembly can be increased, for example, according to the preset power loss of the motor assembly, the first preset step size and the current heating power. When the current heating power is 0, the heating power of the motor assembly is determined according to the preset power loss. When the current heating power is not 0, the heating power of the motor assembly is increased according to the first preset step size and the current heating power, so as to maximize the heating efficiency and heating effect of the motor assembly within the battery allowable output power while preventing the battery from being over-discharged.

[0089] When the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold is less than the sum of the current mechanical power and the current heating power (i.e. |current allowed discharge power-preset discharge protection threshold|<|current heating power+current mechanical power|), it can be considered that the electric energy allowed to be output by the battery at this time is not enough to allow the motor assembly to continue to heat at the current heating power while ensuring that the vehicle can drive normally. At this time, the heating power of the motor assembly is reduced, for example, according to the first preset step size and the current heating power. In this way, the heating power of the motor assembly can be adjusted in real time according to the electric energy allowed to be output by the battery and the current mechanical power while preventing the battery from being over-discharged, so as to ensure that the vehicle can drive normally on the one hand, and to facilitate the fastest heating rate and effect of the system on the other hand.

[0090] When the current operating parameters do not meet the preset heating conditions corresponding to the driving discharge condition, it can be considered that the motor assembly cannot work normally at this time, and the heating power of the motor assembly can be determined to be 0, that is, the operation of the motor assembly is not controlled.

[0091] In this way, it is possible to determine whether to control the operation of the motor assembly according to the preset heating conditions corresponding to the driving discharge condition to prevent failures during the operation of the motor assembly. When the operation of the motor assembly is confirmed to be controlled, the heating power of the motor assembly is adjusted in real time on the premise of ensuring the normal response of the driving function of the motor assembly to maximize the heating function of the motor assembly, increase the heating rate of the battery temperature, and increase the efficiency of the motor assembly. At the same time, the allowable output power of the battery can also take into account the preset discharge protection threshold to prevent the battery from being over-discharged during the operation of the motor assembly, thereby facilitating the protection of battery safety and life.

[0092] See also Fig.10In some embodiments, when the current operating condition is a charging condition, step 0121: determining a target heating device according to a heating control strategy includes:

[0093] Step 01215: when the current battery temperature is less than the second temperature threshold, determining that the target heating device is a heating device and a motor assembly;

[0094] Step 01216: when the current battery temperature is greater than or equal to the second temperature threshold and less than the third temperature threshold, determining that the target heating device is a motor assembly;

[0095] Step 01217: When the current battery temperature is greater than or equal to the third temperature threshold, determine that there is no target heating device.

[0096] Specifically, please combine Fig.11 In the figure, T1 represents the time point when the current battery temperature reaches the optimal temperature for battery performance, and T2 represents the time point when the current battery temperature reaches the highest temperature for battery performance corresponding to the charging condition. Fig.11 The battery charging power curve is Fig. 9 The battery discharge power curve is actually the same, so the best battery performance temperature under the discharge condition is the same as the best battery performance temperature under the charging condition, and the highest battery performance temperature under the discharge condition is the same as the highest battery performance temperature under the charging condition. The line segment in the fourth quadrant represents the target heating device used during this time period.

[0097] When the current working condition is in the charging condition, the energy source of the vehicle is an external energy device, such as a charging pile, or the energy source of the vehicle is the feedback energy of the motor assembly. For example, during the braking process, the motor assembly can generate feedback energy and transmit the feedback energy to the battery and the motor assembly. At this time, the battery does not need to power the heating device.

[0098] When the current battery temperature is less than the second temperature threshold, it can be considered that the battery temperature is low at this time. Therefore, the target heating equipment can be determined as the heating device and the motor assembly to maximize the power of the heating equipment and ensure that the battery can complete the heating at the fastest speed allowed by the current heating equipment.

[0099] When the current battery temperature is greater than or equal to the second temperature threshold and less than the third temperature threshold, the heating efficiency of the motor assembly is high, so it can be determined that the target heating device includes the motor assembly. When the vehicle can only control the start or stop of the heating device, the target heating device does not include the heating device, that is, the target heating device is only the motor assembly. Of course, when the heating efficiency needs to be further improved, the target heating device can be the motor assembly and the heating device.

[0100] When the current battery temperature is greater than or equal to the third temperature threshold, it can be considered that the battery does not need to be heated, and the battery can even be cooled so that the current battery temperature can drop to the third temperature threshold, thereby improving the performance of the battery. Therefore, it can be confirmed that there is no target heating device at this time, and when the target power is controlled according to the operating parameters corresponding to the heating strategy, the power of the motor assembly and the heating device can be controlled to be 0, that is, the motor assembly and the heating device can be turned off.

[0101] In this way, multiple temperature thresholds can be determined according to the operating conditions of the battery at different temperatures under charging conditions, and the corresponding target heating equipment can be enabled according to the temperature range in which the current battery temperature is located, so as to maximize the heating function of the motor assembly under different operating conditions and achieve the fastest heating efficiency and effect of the system.

[0102] See also Fig.12 In some embodiments, when the current operating condition is a charging condition and the target heating device is a motor assembly, the operating parameters include a preset heating power of the motor assembly. Step 0122: controlling the heating power of the target heating device according to the operating parameters of the vehicle includes:

[0103] Step 01225: Control the heating power of the motor assembly according to the preset heating power.

[0104] Specifically, the operating parameters include the preset heating power of the motor assembly. The preset heating power is the heating efficiency when the motor assembly generates more heat. For example, the preset heating power is the maximum heating efficiency of the motor assembly. When the current operating condition is a charging condition, the energy source of the vehicle is a power supply device other than a battery. For example, when the current operating condition is a parking charging condition, the energy source of the vehicle is an external power supply device, such as a charging column, and the battery and the heating device are charged by the external power supply device. When the current operating condition is a driving charging condition, the energy source of the vehicle is a motor assembly, and the motor assembly can convert braking energy into electrical energy through an inverter, and then transmit the electrical energy to the battery for storage, or transmit the electrical energy to the heating module of the motor assembly.

[0105] Therefore, when the target heating device is a motor assembly, the motor assembly can be directly driven to operate at the maximum heating efficiency, so that the motor assembly is heated with greater efficiency, thereby ensuring that the temperature of the battery can quickly rise to a preset range.

[0106] See also Fig.12 In some embodiments, when the current operating condition is a parking charging condition, the battery heating control method further includes:

[0107] Step 013: Adjust the discharge power of the power supply device according to the current allowed charging power of the battery, the preset heating power and the current discharge power of the power supply device.

[0108] Specifically, the power supply equipment, such as a charging pile, can supply power to the vehicle according to the discharge power when the vehicle is in a parking charging condition. It can be judged whether the discharge power of the power supply equipment is appropriate based on the current allowed charging power of the battery and the preset heating power, that is, it can be judged whether the electric energy delivered by the external power supply equipment meets the requirements of battery charging and motor component heating, and the discharge power of the power supply equipment can be adjusted according to the judgment result. In the case where the electric energy delivered by the external power supply equipment is less than the requirements of battery charging and motor component heating, the discharge power of the power supply equipment is increased; in the case where the electric energy delivered by the external power supply equipment is greater than the requirements of battery charging and motor component heating, the discharge power of the power supply equipment is reduced.

[0109] Therefore, the corresponding adjustment strategy can be set according to the correspondence between the absolute value of the difference between the allowed charging power and the preset charging protection threshold and the absolute value of the difference between the current discharge power of the power supply device and the preset heating power. It can be understood that the current discharge power of the power supply device represents the electric energy delivered by the external power supply device, and the sum of the absolute value of the difference between the allowed charging power and the preset charging protection threshold and the preset heating power is the power corresponding to the demand for battery charging and motor component heating. Then, according to the correspondence between the absolute value of the difference between the current allowed charging power and the preset charging protection threshold and the absolute value of the difference between the current discharge power of the power supply device and the preset heating power, the discharge power of the power supply device is adjusted.

[0110] Alternatively, when the absolute value of the difference between the current allowed charging power of the battery and the preset charging protection threshold is greater than the absolute value of the difference between the current discharge power of the power supply device and the preset heating power, it can be deduced that: preset heating power + current allowed charging power of the battery - preset charging protection threshold > current discharge power of the power supply device, so it can be determined that the current discharge power of the power supply device is small and it is difficult to meet the requirements of battery charging and motor component heating. Therefore, the discharge power of the power supply device can be increased, for example, the discharge power of the power supply device can be increased according to the second preset step size and the current discharge power of the power supply device, so as to prevent the battery from overcharging and ensure that the electric energy delivered by the subsequent external power supply device can meet the requirements of battery charging and motor component heating. When the discharge power of the power supply device reaches its limit value and still cannot meet the requirements of battery charging and motor component heating, the charging power of the battery can be reduced or the heating power of the motor can be reduced.

[0111] When the absolute value of the difference between the current allowable charging power of the battery and the preset charging protection threshold is less than the absolute value of the difference between the current discharge power of the power supply device and the preset heating power, it can be deduced that: preset heating power + current allowable charging power of the battery - preset charging protection threshold < current discharge power of the power supply device, so it can be determined that the current discharge power of the power supply device is too large and the vehicle does not need to use so much electric energy. At this time, the discharge power of the power supply device can be reduced, for example, the discharge power of the power supply device can be reduced according to the second preset step size and the current discharge power of the power supply device, so as to prevent the external power supply device from transmitting too much electric energy while preventing the battery from being overcharged.

[0112] In this way, under the parking charging condition, the motor assembly can preset the heating power to heat the battery, so as to fully use the energy of the external power supply equipment to heat the battery and even the vehicle, thereby increasing the heating speed of the motor assembly. At the same time, the discharge power of the power supply equipment can be adjusted in real time according to the power demand of the vehicle, so as to ensure that the power delivered by the external power supply equipment can meet the needs of battery charging and motor assembly heating, while the external power supply equipment does not deliver too much power.

[0113] See also Fig.13 In some embodiments, when the current operating condition is a driving and charging operating condition, the battery heating control method further includes:

[0114] Step 014: Adjust the feedback power of the motor assembly according to the current allowable charging power of the battery, the current mechanical power of the motor assembly, the preset heating power and the current feedback power of the motor assembly.

[0115] Specifically, the motor assembly can deliver electric energy to other devices of the vehicle according to the feedback power when the current operating condition is the driving and charging operating condition. At this time, it can be judged whether the current feedback power of the motor assembly meets the electric energy requirements of the battery and the motor assembly based on the current allowable charging power of the battery, the current mechanical power and the preset heating power, that is, it can be judged whether the electric energy delivered by the motor assembly meets the requirements of vehicle driving, battery charging and motor assembly heating, and the feedback power of the motor assembly is adjusted according to the judgment result. When the electric energy delivered by the external energy device is less than the requirements of vehicle driving, battery charging and motor assembly heating, the feedback power of the motor assembly is increased; when the electric energy delivered by the external energy device is greater than the requirements of vehicle driving, battery charging and motor assembly heating, the feedback power of the motor assembly is reduced.

[0116] Therefore, the corresponding adjustment strategy can be set according to the absolute value of the difference between the current allowed charging power and the preset charging protection threshold and the absolute value of the difference between the current feedback power of the motor component minus the preset heating power and the current mechanical power. It can be understood that the current feedback power of the motor component represents the electric energy delivered by the motor component at this time, and the absolute value of the difference between the allowed charging power and the preset charging protection threshold, and the sum of the current mechanical power and the preset heating power are the power corresponding to the needs of vehicle driving, battery charging and motor component heating. Then, according to the absolute value of the difference between the current allowed charging power of the battery and the preset charging protection threshold, and the absolute value of the difference between the current feedback power of the motor component minus the preset heating power and the current mechanical power, the feedback power of the motor component is adjusted.

[0117] In the case where the absolute value of the difference between the current allowed charging power of the battery and the preset charging protection threshold is greater than the absolute value of the difference obtained by subtracting the preset heating power and the current mechanical power from the current feedback power of the motor assembly, it is deduced that: |preset heating power+current mechanical power+current allowed charging power-preset charging protection threshold|>current feedback power of the motor assembly, so it can be determined that the current feedback power of the motor assembly is small and it is difficult to meet the needs of vehicle driving, battery charging and heating of the motor assembly. At this time, the feedback power of the motor assembly can be increased. For example, the feedback power of the motor assembly can be increased according to the second preset step size and the current feedback power of the motor assembly to ensure that the driving function of the motor assembly responds normally while preventing the battery from overcharging, and the subsequent electric energy delivered by the motor assembly can meet the needs of battery charging and motor assembly heating. In the case where the feedback power of the motor assembly reaches its limit value and still cannot meet the needs of battery charging and motor assembly heating, the charging power of the battery can be reduced or the heating power of the motor can be reduced.

[0118] When the absolute value of the difference between the current allowed charging power of the battery and the preset charging protection threshold is less than the absolute value of the difference between the current feedback power of the motor component and the preset heating power and the current mechanical power, the following is derived: | preset heating power + current mechanical power + current allowed charging power - preset charging protection threshold | < current feedback power of the motor component, so it can be determined that the current feedback power of the motor component is too large and the vehicle does not need to use so much electrical energy. At this time, the feedback power of the motor component can be reduced, for example, according to the second preset step size and the current feedback power of the motor component, to ensure that the driving function of the motor component responds normally while preventing the battery from being overcharged, and to prevent the motor component from delivering too much electrical energy.

[0119] In this way, under driving and charging conditions, the motor assembly can preset the heating power to heat the battery, so as to fully use the energy of the motor assembly to heat the battery and even the vehicle, thereby increasing the heating speed of the motor assembly. At the same time, the feedback power of the motor assembly can also be adjusted according to the power demand of the vehicle, so as to ensure that the driving function of the motor assembly responds normally, and at the same time ensure that the power delivered by the motor assembly can meet the needs of battery charging and motor assembly heating, and the motor assembly will not deliver too much power.

[0120] See also Fig.14 In order to better implement the battery heating control method of the embodiment of the present application, the embodiment of the present application also provides a battery heating control device 10. The battery heating control device 10 is applied to a vehicle, the vehicle includes a heating device and a battery, the heating device is used to heat the battery, and the battery heating control device 10 may include an acquisition module 11 and a control module 12. The acquisition module 11 is used to obtain the heating control strategy corresponding to the current working condition. The control module 12 is used to control the power of the heating device according to the heating control strategy and the operating parameters of the vehicle, so that the temperature of the battery of the vehicle is within a preset range.

[0121] The control module 12 is specifically used to determine a target heating device among the heating devices according to a heating control strategy, the target heating device being at least one of a motor component of the vehicle and a heating device of the vehicle; and to control the heating power of the target heating device according to operating parameters of the vehicle.

[0122] The control module 12 is specifically used to determine that the target heating device is a heating device when the current battery temperature is less than a first temperature threshold; to determine that the target heating device is a heating device and a motor assembly when the current battery temperature is greater than or equal to the first temperature threshold and less than a second temperature threshold; to determine that the target heating device is a motor assembly when the current battery temperature is greater than or equal to the second temperature threshold and less than a third temperature threshold; and to determine that there is no target heating device when the current battery temperature is greater than or equal to the third temperature threshold.

[0123] The control module 12 is specifically used to adjust the heating power of the motor component according to the current allowable discharge power and the current heating power when the current operating parameters meet the preset heating conditions corresponding to the parking discharge condition; when the current operating parameters do not meet the preset heating conditions corresponding to the parking discharge condition, determine that the heating power of the motor component is zero.

[0124] The control module 12 is specifically used to adjust the heating power of the motor component according to the corresponding relationship between the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold and the current heating power.

[0125] The control module 12 is specifically used to increase the heating power of the motor assembly when the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold is greater than the current heating power; and to reduce the heating power of the motor assembly when the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold is less than the current heating power.

[0126] The control module 12 is specifically used to adjust the heating power of the motor assembly according to the current allowable discharge power, the current mechanical power and the current heating power when the current operating parameters meet the preset heating conditions corresponding to the driving discharge condition; when the current operating parameters do not meet the preset heating conditions corresponding to the driving discharge condition, determine that the heating power of the motor assembly is zero.

[0127] The control module 12 is specifically used to adjust the heating power of the motor assembly according to the correspondence between the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold and the sum of the current mechanical power and the current heating power.

[0128] The control module 12 is specifically used to increase the heating power of the motor assembly when the absolute value of the difference between the current allowable discharge power and the preset discharge protection threshold is greater than the sum of the current mechanical power and the current heating power; and to reduce the heating power of the motor assembly when the absolute value of the difference between the current allowable discharge power and the preset discharge protection threshold is less than the sum of the current mechanical power and the current heating power.

[0129] The control module 12 is specifically used to determine that the target heating device is a heating device and a motor assembly when the current battery temperature is less than the second temperature threshold; to determine that the target heating device is a motor assembly when the current battery temperature is greater than or equal to the second temperature threshold and less than the third temperature threshold; and to determine that there is no target heating device when the current battery temperature is greater than or equal to the third temperature threshold.

[0130] The control module 12 is specifically used to control the operation of the motor assembly according to a preset heating power.

[0131] The battery heating control device 10 further includes an adjustment module 13. The adjustment module 13 is used to adjust the discharge power of the power supply device according to the current allowable charging power of the battery, the preset heating power and the current discharge power of the power supply device.

[0132] The adjustment module 13 is specifically used to adjust the discharge power of the power supply device according to the correspondence between the absolute value of the difference between the current allowed charging power of the battery and the preset charging protection threshold and the absolute value of the difference between the current discharge power of the power supply device and the preset heating power.

[0133] The adjustment module 13 is specifically used to increase the discharge power of the power supply device when the absolute value of the difference between the current allowed charging power of the battery and the preset charging protection threshold is greater than the absolute value of the difference between the current discharge power of the power supply device and the preset heating power; and to reduce the discharge power of the power supply device when the absolute value of the difference between the current allowed charging power of the battery and the preset charging protection threshold is less than the absolute value of the difference between the current discharge power of the power supply device and the preset heating power.

[0134] The adjustment module 13 is used to adjust the feedback power of the motor assembly according to the current allowed charging power of the battery, the current mechanical power of the motor assembly, the preset heating power and the current feedback power of the motor assembly.

[0135] The adjustment module 13 is specifically used to adjust the feedback power of the motor component according to the correspondence between the absolute value of the difference between the current allowable charging power of the battery and the preset charging protection threshold, and the absolute value of the difference obtained by subtracting the preset heating power and the current mechanical power from the current feedback power of the motor component.

[0136] The adjustment module 13 is specifically used to increase the feedback power of the motor assembly when the absolute value of the difference between the current allowable charging power of the battery and the preset charging protection threshold is greater than the absolute value of the difference between the current feedback power of the motor assembly minus the preset heating power and the current mechanical power; and to reduce the feedback power of the motor assembly when the absolute value of the difference between the current allowable charging power of the battery and the preset charging protection threshold is greater than the absolute value of the difference between the current feedback power of the motor assembly minus the preset heating power and the current mechanical power.

[0137] The control module 12 is specifically used to control the start-up of the heating device according to the operating parameters.

[0138] The battery heating control device 10 is described above from the perspective of functional modules in conjunction with the accompanying drawings. The functional modules can be implemented in hardware form, can be implemented in software form, or can be implemented in combination with hardware and software modules. Specifically, the steps of the method embodiments in the embodiments of the present application can be completed by hardware integrated logic circuits in the processor and / or software form instructions. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware coding processor, or can be executed by a combination of hardware and software modules in the coding processor. Optionally, the software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps in the above method embodiments in combination with its hardware.

[0139] See also Fig.15The vehicle 100 of the embodiment of the present application includes a processor 80, a memory 90 and a computer program, wherein the computer program is stored in the memory 90 and executed by the processor 80, and the computer program includes instructions for executing the battery heating control method of any of the above embodiments.

[0140] See also Fig.16 The embodiment of the present application also provides a computer-readable storage medium 300 on which a computer program 310 is stored. When the computer program 310 is executed by a processor 320, the steps of the battery heating control method of any of the above-mentioned embodiments are implemented. For the sake of brevity, they are not repeated here.

[0141] In the description of this specification, the descriptions with reference to the terms "certain embodiments", "in an example", "exemplarily", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0142] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0143] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery heating control method, characterized in that: The method comprises: Obtain the heating control strategy corresponding to the current working condition; The power of the heating device is controlled according to the heating control strategy and the operating parameters of the vehicle so that the temperature of the battery of the vehicle is within a preset range.

2. The battery heating control method according to claim 1, characterized in that: The controlling the power of the heating device according to the heating control strategy and the operating parameters of the vehicle comprises: determining a target heating device among the heating devices according to the heating control strategy, wherein the target heating device is at least one of a motor component of the vehicle and a heating device of the vehicle; The heating power of the target heating device is controlled according to the operating parameters of the vehicle.

3. The battery heating control method according to claim 2, characterized in that: In the case where the current working condition is a discharge working condition, determining a target heating device among the heating devices according to the heating control strategy includes: When the current battery temperature is less than a first temperature threshold, determining that the target heating device is the heating apparatus; When the current battery temperature is greater than or equal to the first temperature threshold and less than a second temperature threshold, determining that the target heating device is the heating device and the motor assembly; When the current battery temperature is greater than or equal to the second temperature threshold and less than a third temperature threshold, determining that the target heating device is the motor assembly; When the current battery temperature is greater than or equal to the third temperature threshold, it is determined that there is no target heating device.

4. The battery heating control method according to claim 3, characterized in that: When the current operating condition is a parking discharge operating condition and the target heating device is the motor assembly, the operating parameters include a current allowable discharge power of the battery and a current heating power of the motor assembly, and controlling the heating power of the target heating device according to the operating parameters of the vehicle includes: When the current operating parameters satisfy the preset heating conditions corresponding to the parking discharge condition, adjusting the heating power of the motor assembly according to the current allowed discharge power and the current heating power; When the current operating parameters do not satisfy the preset heating conditions corresponding to the parking discharge condition, the heating power of the motor component is determined to be zero.

5. The battery heating control method according to claim 4, characterized in that: The adjusting the heating power of the motor component according to the current allowable discharge power and the current heating power comprises: The heating power of the motor component is adjusted according to the corresponding relationship between the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold and the current heating power.

6. The battery heating control method according to claim 5, characterized in that: The adjusting the heating power of the motor component according to the correspondence between the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold and the current heating power includes: In the case where the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold is greater than the current heating power, increasing the heating power of the motor component; When the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold is smaller than the current heating power, the heating power of the motor component is reduced.

7. The battery heating control method according to claim 4, characterized in that: The preset heating condition corresponding to the parking discharge condition includes: the absolute value of the difference between the current allowable discharge power of the battery and the preset discharge protection threshold is greater than the preset power loss of the motor component.

8. The battery heating control method according to claim 3, characterized in that: When the current operating condition is a driving discharge condition and the target heating device is the motor assembly, the operating parameters include the current allowable discharge power of the battery, the current mechanical power of the motor assembly, and the current heating power of the motor assembly, and controlling the heating power of the target heating device according to the operating parameters of the vehicle includes: When the current operating parameters satisfy the preset heating conditions corresponding to the driving discharge condition, the heating power of the motor assembly is adjusted according to the current allowable discharge power, the current mechanical power and the current heating power; When the current operating parameters do not satisfy the preset heating conditions corresponding to the driving discharge condition, the heating power of the motor component is determined to be zero.

9. The battery heating control method according to claim 8, characterized in that: The step of adjusting the heating power of the motor component according to the current allowable discharge power, the current mechanical power and the current heating power comprises: The heating power of the motor assembly is adjusted according to the corresponding relationship between the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold and the sum of the current mechanical power and the current heating power.

10. The battery heating control method according to claim 9, characterized in that: The adjusting the heating power of the motor assembly according to the correspondence between the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold and the sum of the current mechanical power and the current heating power comprises: In the case where the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold is greater than the sum of the current mechanical power and the current heating power, increasing the heating power of the motor component; When the absolute value of the difference between the current allowed discharge power and the preset discharge protection threshold is smaller than the sum of the current mechanical power and the current heating power, the heating power of the motor component is reduced.

11. The battery heating control method according to claim 8, characterized in that: The preset heating condition corresponding to the driving discharge condition includes: the absolute value of the difference between the current allowable discharge power and the preset discharge protection threshold is greater than the sum of the current mechanical power and the preset loss power of the motor component.

12. The battery heating control method according to claim 2, characterized in that: When the current operating condition is a charging operating condition, determining a target heating device in the heating devices according to the heating control strategy includes: When the current battery temperature is less than a second temperature threshold, determining that the target heating device is the heating device and the motor assembly; When the current battery temperature is greater than or equal to the second temperature threshold and less than a third temperature threshold, determining that the target heating device is the motor assembly; When the current battery temperature is greater than or equal to the third temperature threshold, it is determined that there is no target heating device.

13. The battery heating control method according to claim 12, characterized in that: When the current operating condition is a charging operating condition and the target heating device is the motor assembly, the operating parameter includes a preset heating power of the motor assembly, and controlling the heating power of the target heating device according to the operating parameter of the vehicle includes: The motor assembly is controlled to operate according to the preset heating power.

14. The battery heating control method according to claim 12, characterized in that: When the current operating condition is a parking charging condition, the method further includes: The discharge power of the power supply device is adjusted according to the currently allowed charging power of the battery, the preset heating power and the current discharge power of the power supply device.

15. The battery heating control method according to claim 14, characterized in that: The step of adjusting the discharge power of the power supply device according to the current allowed charging power of the battery, the preset heating power and the current discharge power of the power supply device comprises: The discharge power of the power supply device is adjusted according to the correspondence between the absolute value of the difference between the current allowed charging power of the battery and the preset charging protection threshold and the absolute value of the difference between the current discharge power of the power supply device and the preset heating power.

16. The battery heating control method according to claim 15, characterized in that: The adjusting the discharge power of the power supply device according to the correspondence between the absolute value of the difference between the current allowed charging power of the battery and the preset charging protection threshold and the absolute value of the difference between the current discharge power of the power supply device and the preset heating power includes: In a case where the absolute value of the difference between the current allowed charging power of the battery and the preset charging protection threshold is greater than the absolute value of the difference between the current discharge power of the power supply device and the preset heating power, increasing the discharge power of the power supply device; When the absolute value of the difference between the current allowed charging power of the battery and the preset charging protection threshold is smaller than the absolute value of the difference between the current discharging power of the power supply device and the preset heating power, the discharging power of the power supply device is reduced.

17. The battery heating control method according to claim 13, characterized in that: When the current operating condition is a driving charging condition, the method further includes: The regenerative power of the motor component is adjusted according to the current allowed charging power of the battery, the current mechanical power of the motor component, the preset heating power and the current regenerative power of the motor component.

18. The battery heating control method according to claim 17, characterized in that: The adjusting the feedback power of the motor assembly according to the current allowed charging power of the battery, the current mechanical power of the motor assembly, the preset heating power and the current feedback power of the motor assembly comprises: The feedback power of the motor assembly is adjusted according to the correspondence between the absolute value of the difference between the current allowed charging power of the battery and the preset charging protection threshold, and the absolute value of the difference obtained by subtracting the preset heating power and the current mechanical power from the current feedback power of the motor assembly.

19. The battery heating control method according to claim 18, characterized in that: The adjusting the feedback power of the motor component according to the correspondence between the absolute value of the difference between the current allowed charging power of the battery and the preset charging protection threshold and the absolute value of the difference obtained by subtracting the preset heating power and the current mechanical power from the current feedback power of the motor component includes: In a case where the absolute value of the difference between the current allowed charging power of the battery and the preset charging protection threshold is greater than the absolute value of the difference obtained by subtracting the preset heating power and the current mechanical power from the current feedback power of the motor component, increasing the feedback power of the motor component; When the absolute value of the difference between the current allowed charging power of the battery and the preset charging protection threshold is greater than the absolute value of the difference between the current feedback power of the motor component minus the preset heating power and the current mechanical power, the feedback power of the motor component is reduced.

20. The battery heating control method according to claim 2, characterized in that: In the case where the target heating device is a heating apparatus, controlling the power of the target heating device according to the operating parameters of the vehicle includes: The heating device is controlled to start according to the operating parameters.

21. A battery heating control device, characterized in that: include: An acquisition module is used to obtain a heating control strategy corresponding to the current working condition; The control module is used to control the power of the heating device according to the heating control strategy and the operating parameters of the vehicle so that the temperature of the battery of the vehicle is within a preset range.

22. An electronic device, characterized in that: include: processor; and A memory, in which a computer program is stored and executed by the processor, wherein the computer program includes instructions for executing the battery heating control method according to any one of claims 1 to 20.

23. A vehicle, characterized in that: include: A heating device and a battery, wherein the heating device is used to heat the battery; and The electronic device of claim 22.

24. A non-volatile computer-readable storage medium containing a computer program, characterized in that: When the computer program is executed by a processor, the processor executes the battery heating control method according to any one of claims 1 to 20.

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