Vehicle control method, device and equipment and storage medium

Abstract

The invention discloses a vehicle control method, device and equipment and a storage medium, and relates to the technical field of vehicle control, and the vehicle control method comprises the steps that when a vehicle-mounted battery meets the multi-gear heating condition, the whole vehicle working condition type is determined; if the whole vehicle working condition category is the low-temperature travel category, the whole vehicle demand power and the vehicle-mounted battery output power are obtained, and emergency reserved power is determined; determining a target heating gear according to the vehicle demand power, the vehicle-mounted battery output power and the emergency reserved power; and controlling the side heating film and / or the bottom heating film to operate based on the target heating gear so as to heat the battery. As the heating films are arranged on the side surface and the bottom of the battery cell, the heating film coverage area is reasonably arranged, then the proper target heating gear is selected according to the actual whole vehicle working condition category of the vehicle, and the side surface heating film and / or the bottom heating film are / is controlled to operate based on the target heating gear, so that reasonable control on the heating films is ensured, and the service life of the battery cell is prolonged. And the influence on the operation of the vehicle is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle control, in particular to a vehicle control method, device, equipment and storage medium. BACKGROUND

[0002] As a new technology, the power battery pack heating film heating is to set a heating film around the battery cell and heat the battery cell through the heating film. However, in actual use, if the coverage area of the heating film is not reasonably set, the heating effect may not be ideal. In addition, as a power consumption element of the whole vehicle, the heating film requires a large power. If the heating film is not reasonably controlled, the performance of the vehicle-mounted battery may be affected, for example, when the vehicle is running violently under low temperature working conditions, if the heating film occupies a large power for heating, the actual output power of the driving motor may be affected, and the power performance of the whole vehicle may be affected. In the preheating working condition, the heating power cannot be actively adjusted according to the remaining heating time, and the situation of repeated heating and excessive heating may occur. In the charging working condition, the heating film may compete with the battery pack for the output power of the charging pile, and the charging rate may be slow.

[0003] Therefore, how to reasonably set the heating film and how to reasonably control the operation of the heating film are difficult problems to be solved in the application of the heating film to the battery. SUMMARY

[0004] The main purpose of the present application is to provide a vehicle control method, device, equipment and storage medium, which aims to solve the technical problems that the related art does not reasonably set the coverage area of the heating film, and does not consider controlling the heating film according to the working conditions, resulting in that the actual application of the heating film to the vehicle-mounted battery is not ideal.

[0005] To achieve the above-mentioned purpose, the present application provides a vehicle control method applied to a vehicle, wherein both sides of a battery cell in a vehicle-mounted battery of the vehicle are provided with side heating films, and the bottom of the battery cell is provided with a bottom heating film. The method comprises the following steps. When the vehicle-mounted battery meets the multi-gear heating condition, the working condition category of the whole vehicle is determined. If the working condition category of the whole vehicle is the low-temperature travel category, the demand power of the whole vehicle and the output power of the vehicle-mounted battery are obtained, and the emergency reserved power is determined. The target heating gear is determined according to the demand power of the whole vehicle, the output power of the vehicle-mounted battery and the emergency reserved power. The side heating film and / or the bottom heating film are controlled to operate based on the target heating gear, so as to heat the battery.

[0006] Optionally, the target heating gear is determined according to the demand power of the whole vehicle, the output power of the vehicle-mounted battery and the emergency reserved power, comprising the following steps. The whole vehicle mode of the vehicle is obtained. if the vehicle is of the pure-electric-priority type, determining a heating available power based on the vehicle battery output power, the vehicle demand power, and an emergency reserved power; detecting whether the heating available power is within a heating power interval; if the heating available power is within the heating power interval, dividing the heating power interval into a plurality of power sub-intervals according to heating power corresponding to each available heating gear of the vehicle; matching the heating available power with the plurality of power sub-intervals to determine a target power sub-interval; setting a heating gear corresponding to the target power sub-interval as a target heating gear.

[0007] Optionally, before the detecting whether the heating available power is within a heating power interval, the method further comprises: obtaining a maximum gear level and a minimum gear level among the available heating gears of the vehicle; setting a heating power corresponding to the maximum gear level as an upper limit of the interval, and setting a heating power corresponding to the minimum gear level as a lower limit of the interval; constructing a heating power interval based on the upper limit and the lower limit.

[0008] Optionally, after the detecting whether the heating available power is within a heating power interval, the method further comprises: if the heating available power is not within the heating power interval and is greater than the upper limit of the heating power interval, detecting whether a vehicle generator has started; if the vehicle generator has started and a difference between the heating available power and the upper limit is greater than or equal to a vehicle generator provided power, shutting down the vehicle generator, setting a difference between the vehicle battery output power and the vehicle generator provided power as a new vehicle battery output power, and returning to the step of determining the heating available power based on the vehicle battery output power, the vehicle demand power, and the emergency reserved power if the vehicle is of the pure-electric-priority type; if the vehicle generator has not started, or the vehicle generator has started and the difference between the heating available power and the upper limit is less than the vehicle generator provided power, setting the target heating gear as the maximum gear level among the available heating gears.

[0009] Optionally, after the detecting whether the heating available power is within a heating power interval, the method further comprises: If the heating power interval is not reached and the heating available power is less than the lower limit of the heating power interval, the vehicle generator is started, the sum of the vehicle battery output power and the vehicle generator provided power is taken as the new vehicle battery output power, and the step of determining the heating available power according to the vehicle battery output power, the vehicle demand power and the emergency reserved power is returned.

[0010] Optionally, after the vehicle whole vehicle mode is acquired, the method further comprises: If the whole vehicle mode is a hybrid priority type, the gear heating power corresponding to the maximum gear level in each available heating gear of the vehicle is acquired; The sum of the gear heating power, the emergency reserved power and the vehicle demand power is calculated to generate a required power sum; The vehicle battery output power and the required power sum are compared; If the vehicle battery output power is less than the required power sum and the vehicle generator is not started, the vehicle generator is started, the sum of the vehicle generator provided power and the vehicle battery output power is taken as the new vehicle battery output power, and the step of comparing the vehicle battery output power and the required power sum is returned. If the vehicle battery output power is greater than or equal to the required power sum, the vehicle generator has been started, and the vehicle battery output power is greater than or equal to the sum of the required power sum and the vehicle generator provided power, the vehicle generator is turned off, the difference between the vehicle generator provided power and the vehicle battery output power is taken as the new vehicle battery output power, and the step of comparing the vehicle battery output power and the required power sum is returned. If the vehicle battery output power is greater than or equal to the required power sum and the vehicle generator is not started, or if the vehicle battery output power is greater than or equal to the required power sum, the vehicle generator has been started, and the vehicle battery output power is less than the sum of the required power sum and the vehicle generator provided power, the target heating gear is set to the maximum gear level in the available heating gear.

[0011] Optionally, after the vehicle whole vehicle mode is acquired, the method further comprises: If the whole vehicle mode is a hybrid priority type, the gear heating power corresponding to the maximum gear level in each available heating gear of the vehicle is acquired; The required temperature rise rate is calculated according to the preheating temperature rise and the allowed temperature rise duration; The required temperature rise rate is compared with the temperature rise rate corresponding to each heating gear to determine the target heating gear; The side heating film and / or the bottom heating film are controlled to operate based on the target heating level in order to heat the battery.

[0012] Optionally, the battery preheating categories include preheating in transit and preheating in advance; The acquisition of the preheating temperature and the allowable heating time includes: If the battery preheating category is in-transit preheating, the preheating increase temperature is determined based on the lowest cell temperature of the vehicle battery and the target charging temperature, and the time required to reach the target charging address is estimated to generate the allowable temperature rise time. If the battery preheating category is advance preheating, the preheating increase temperature is determined based on the lowest cell temperature of the vehicle battery and the target driving temperature, and the allowable temperature rise time is determined based on the current time and the time when preheating is completed.

[0013] In addition, to achieve the above objectives, this application also provides a vehicle control device applied to a vehicle, wherein side heating films are provided on both sides of the battery cell in the vehicle's on-board battery, and bottom heating film is provided at the bottom of the battery cell; The vehicle control device includes: The determination module is used to determine the vehicle operating condition category when the on-board battery meets the multi-level heating conditions; The acquisition module is used to acquire the vehicle's required power and the output power of the on-board battery, and determine the emergency reserve power, if the vehicle's operating condition category is the low-temperature travel category. The calculation module is used to determine the target heating level based on the vehicle's required power, the on-board battery's output power, and the emergency reserve power. The control module is used to control the operation of the side heating film and / or the bottom heating film based on the target heating level, so as to heat the battery.

[0014] In addition, to achieve the above objectives, this application also provides a vehicle control device, the device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the vehicle control method as described above.

[0015] In addition, to achieve the above objectives, this application also provides a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the vehicle control method as described above.

[0016] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the vehicle control method described above.

[0017] One or more technical solutions proposed in this application have at least the following technical effects: Because heating films are installed on both the sides and bottom of the battery cell, and the coverage area of ​​the heating films is reasonably set, the appropriate target heating level is selected according to the actual vehicle operating conditions. The operation of the side heating films and / or bottom heating films is controlled based on the target heating level, which ensures reasonable control of the heating films and avoids affecting the operation of the vehicle. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a flowchart illustrating an embodiment of the vehicle control method of this application. Figure 2 This is a schematic diagram of the heating film structure according to an embodiment of this application; Figure 3 This is a flowchart illustrating Embodiment 2 of the vehicle control method of this application; Figure 4 This is a flowchart illustrating Embodiment 3 of the vehicle control method of this application; Figure 5 This is a schematic diagram of the module structure of the vehicle control device according to an embodiment of this application; Figure 6 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the vehicle control method in the embodiments of this application.

[0021] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0023] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Based on this, embodiments of this application provide a vehicle control method, referring to... Figure 1 , Figure 1This is a flowchart illustrating the first embodiment of the vehicle control method of this application.

[0025] In this embodiment, the vehicle control method is applied to a vehicle, and the vehicle's on-board battery has side heating films on both sides of the battery cell and bottom heating film on the bottom of the battery cell. It should be noted that if the heating film is only placed on both sides of the battery cell in the vehicle battery, for safety reasons, the power density of the heating film has an upper limit, and the heating rate will not be as good as the traditional liquid heat treatment solution. In order to maximize the heating rate without compromising safety, side heating films can be installed on both sides of the vehicle battery cell, and a bottom heating film can also be installed at the bottom of the cell.

[0026] To facilitate understanding, we will now combine... Figure 2 This explanation is provided, but it does not limit the scope of this solution. Figure 2 This is a schematic diagram of the heating film structure in this embodiment.

[0027] like Figure 2 As shown, in addition to setting side heating films on both sides of the battery cell (the side heating films on both sides of the battery cell can be collectively referred to as side heating films), a bottom heating film is also set at the bottom of the battery cell. The bottom heating film is directly pasted to the cold plate, and the cold plate is made into a concave shape to accommodate the heating film. The battery cell and the cold plate / bottom heating film are connected by thermally conductive structural adhesive. The adhesion to the battery cell is mainly provided by the non-recessed part of the cold plate, and associated flow channels are set to improve the cooling capacity.

[0028] Therefore, based on the bottom heating film, the heating rate can be improved, the overall performance of low-temperature heating can be optimized, the internal space utilization of the entire vehicle battery pack can be improved, the cell bonding strength can be improved, the cooling efficiency can be affected, and the bottom heating film can be protected.

[0029] The vehicle control method includes steps S10 to S40: Step S10: When the vehicle battery meets the multi-level heating conditions, determine the vehicle operating condition category.

[0030] It should be noted that the executing entity in this embodiment can be the vehicle itself, or a vehicle control device installed in the vehicle that can control the on-board battery. The vehicle control device can be a controller installed in the vehicle, such as an ECU controller, or other devices that can achieve the same or similar functions. This embodiment does not limit this. In this embodiment and the following embodiments, the vehicle control method of this embodiment is described using a vehicle control device as an example.

[0031] It should be noted that, since multiple heating films are set, when controlling the heating of the heating films, multiple heating levels can be divided according to the activation of the heating films. For example: Level 1 heating level: only the heating film at the bottom of the battery cell is turned on; Level 2 heating level: the heating films on both sides of the battery cell are turned on; Level 3 heating level: the heating films at the bottom and both sides of the battery cell are turned on.

[0032] The vehicle battery can be a battery pack, which may include at least one cell. If the vehicle battery contains multiple cells, for safety reasons, it is necessary to first detect the temperature difference between the cells in the vehicle battery to determine whether the temperature of each cell in the vehicle battery is uniform.

[0033] In actual use, if the temperature of each cell in the vehicle battery is uneven, that is, the temperature difference between the cells in the vehicle battery is greater than the preset temperature difference threshold, it means that the temperature difference between the cells in the vehicle battery is large and it is necessary to ensure temperature uniformity. The best temperature uniformity is achieved by using only the bottom heating film for heating. At this time, the target heating level can be set to level 1 heating, that is, only the bottom heating film of the cell is turned on. If the temperature of each cell in the vehicle battery is uniform, that is, the temperature difference between the cells in the vehicle battery is less than or equal to the preset temperature difference threshold, it means that the temperature difference between the cells in the vehicle battery is small. At this time, it is necessary to prioritize meeting the heating power requirements. Therefore, it can be determined that the vehicle battery meets the multi-level heating conditions.

[0034] Among them, the cell temperature difference can be the absolute value of the difference between the highest temperature and the lowest temperature of the cell in the vehicle battery; the preset temperature difference threshold can be preset by the vehicle control equipment administrator, for example, setting the preset temperature difference threshold to 5℃.

[0035] In practical use, based on the actual purpose for which the vehicle battery needs heating, vehicle operating conditions can be divided into three main categories: charging conditions, preheating conditions, and low-temperature travel conditions. When determining how to control the heating of the vehicle battery, the vehicle's overall operating condition category should be obtained first.

[0036] The vehicle operating condition category can be determined comprehensively based on the user's pre-set trip, the set subsequent actions, and whether the charging gun is connected.

[0037] In practical applications, since the vehicle battery is usually heated when the vehicle is in a low-temperature environment and the battery temperature is low, the temperature of the vehicle battery can be detected before step S10 in this embodiment (this temperature can be the lowest temperature of the battery cell). If the temperature is lower than the preset low temperature judgment threshold, then step S10 is executed.

[0038] The preset low temperature threshold can be set in advance by the vehicle control equipment administrator, for example, by setting the preset low temperature threshold to -5℃, -10℃, etc.

[0039] In practical implementation, the heating film used may not be a fixed-power heating film, but rather a heating film that supports different power adjustments. In this case, multiple heating levels can be defined based on the activation of the heating film and its heating power. For example, assuming the heating film used has two heating powers, A and B (A < B), the heating levels can be divided into the following order from low to high according to the corresponding heating power: 1A-level heating mode: Only the heating film at the bottom of the battery cell is activated, using A-power heating; 1B-level heating mode: Only the heating film at the bottom of the battery cell is activated, using B-power heating; 2A heating level: The heating films on both sides of the battery cell are turned on, and heating is performed using power A; 2B heating level: The heating films on both sides of the battery cell are turned on, and heating is performed using power A; 3A-level heating mode: The heating films at the bottom and sides of the battery cell are fully opened, and heating is performed using A-level power; 3B-level heating mode: The heating films at the bottom and sides of the battery cell are fully opened, and heating is performed using B power.

[0040] The examples above are for illustrative purposes only and are not intended to limit the specific application. Depending on actual needs, the heating film can support more heating power, and the heating settings can be combined in a more complex manner. For example, the heating films at the bottom and sides of the battery cell can be fully activated, with the bottom heating film using power A and the side heating films using power B.

[0041] Step S20: If the vehicle operating condition category is low-temperature travel category, then obtain the vehicle's required power and the on-board battery output power, and determine the emergency reserve power.

[0042] In actual use, if the vehicle operating condition category is low temperature travel category, it means that the vehicle is powered by the vehicle battery when it is in a low temperature state. In order to ensure the normal operation of the vehicle, the required power of the vehicle and the output power of the vehicle battery can be obtained, and the emergency reserve power can be determined.

[0043] Among them, the total vehicle power requirement can be the power required for the operation of each component in the vehicle, including the power required by the drive motor, DC / DC converter, air conditioning, etc.; the on-board battery output power can be the maximum power that the on-board battery can currently output; and the emergency reserve power is the power required to cope with possible special scenarios.

[0044] Step S30: Determine the target heating level based on the vehicle's required power, the vehicle battery's output power, and the emergency reserve power.

[0045] In practical use, the maximum power that can be supplied to the heating film can be determined based on the vehicle's required power, the output power of the vehicle battery, and the emergency reserve power. Then, the target heating level can be selected from multiple pre-defined heating levels based on this power.

[0046] Step S40: Control the side heating film and / or the bottom heating film to operate based on the target heating level to heat the battery.

[0047] Understandably, after determining the target heating level, the side heating film and / or bottom heating film can be controlled to operate according to the control method recorded in the target heating level in order to heat the vehicle battery.

[0048] This embodiment provides a vehicle control method. Since heating films are set on both the side and bottom of the battery cell, and the coverage area of ​​the heating films is reasonably set, a suitable target heating level is selected according to the actual vehicle operating conditions. The side heating film and / or bottom heating film are controlled based on the target heating level, which ensures reasonable control of the heating film and avoids affecting the operation of the vehicle.

[0049] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in Embodiment 1 above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 3 Step S30 includes steps S301 to S306: Step S301: Obtain the vehicle's overall mode.

[0050] Step S302: If the vehicle mode is pure electric priority, the available heating power is determined based on the output power of the on-board battery, the required power of the vehicle, and the emergency reserved power.

[0051] It should be noted that the vehicle's overall mode can have two options: pure electric priority and hybrid priority. If pure electric priority is selected, the battery output power may not be sufficient to support the power requirements of all the heating levels to be tested. Therefore, it is necessary to determine which heating levels can be used. In this case, the available heating power can be determined first.

[0052] The available heating power is the power available for heating.

[0053] In practical use, the available heating power can be obtained by subtracting the vehicle's required power and emergency reserve power from the output power of the vehicle battery.

[0054] In practical applications, the emergency reserve power can be determined based on the road characteristics of the area to be reached ahead, for example: Read the navigation map and determine whether there is an uphill section within a preset distance from the current vehicle on the planned driving route. If there is an uphill section, obtain the slope of the uphill section and look up the corresponding emergency reserve power in the slope-power mapping table. The slope-power mapping table stores the mapping relationship between the power required for uphill driving and the slope. Read the navigation map and determine whether there are road segments with different speed limits in the planned driving route. If there are, determine the speed difference based on the current vehicle speed and the road speed limit in that segment. Then, determine the emergency reserve power based on the speed difference and the control power required to reach that speed difference. Among them, gradient and speed limit may coexist. If they coexist, they can be determined separately based on gradient and speed limit, and the sum of the determined power values ​​can be used as emergency reserve power.

[0055] The examples above are for illustrative purposes only and do not constitute a specific limitation on this solution.

[0056] Step S303: Detect whether the available heating power is within the heating power range.

[0057] It should be noted that the heating power range can be the range of power required when using a heating film for heating.

[0058] In a specific implementation, the heating power range can be divided according to the maximum and minimum power of the available heating settings in the vehicle. Therefore, before step S303 in this embodiment, the following may also be included: Obtain the maximum and minimum values ​​of each available heating level in the vehicle; The heating power corresponding to the maximum value of the gear level is taken as the upper limit of the interval, and the heating power corresponding to the minimum value of the gear level is taken as the lower limit of the interval. The heating power range is constructed based on the upper limit and the lower limit of the range.

[0059] It should be noted that the available heating levels can be multiple pre-defined levels based on the number of heating films in operation and their power requirements. The maximum heating level is the available heating level with the highest required heating power, and similarly, the minimum heating level is the level with the lowest required heating power. The heating power corresponding to the maximum heating level is the heating power required when operating at this maximum heating level, and similarly, the heating power corresponding to the minimum heating level is the heating power required when operating at this minimum heating level.

[0060] For example: Suppose that the heating film has 3 levels, from 1 to 3, with corresponding heating powers of P1 to P3, and P1 < P2 < P3. Then, the maximum value of the level is 1, the minimum value is 3, and the heating power range is [P1, P3].

[0061] Step S304: If it is within the heating power range, the heating power range is divided into multiple power sub-ranges according to the heating power of each available heating gear of the vehicle.

[0062] Step S305: Match the available heating power with the plurality of power sub-intervals to determine the target power sub-interval.

[0063] Step S306: Take the heating level corresponding to the target power sub-range as the target heating level.

[0064] It should be noted that the available heating levels can be multiple heating levels pre-defined based on the number of heating films in operation and the power.

[0065] Understandably, if the available heating power is within the heating power range, it means that the battery has a certain power surplus that can be used for heating the heating film. However, in order to avoid the heating film having too high a power and occupying too much power, which could cause other components in the vehicle to malfunction, it is necessary to further determine the required heating power level.

[0066] At this point, the heating power range can be divided into multiple power sub-ranges by the heating power corresponding to each available heating level of the vehicle. Then, the available heating power is matched with the multiple power sub-ranges to determine the target power sub-range. Finally, the heating level corresponding to the target power sub-range is taken as the target heating level.

[0067] For example: Suppose the heating film has 3 levels, 1-3, with corresponding heating powers P1-P3. Then the heating power range is [P1, P3], and the usable heating power is PI. If PI∈[P1, P3], the heating power range can be further divided into two heating power sub-ranges: [P1, P2) and [P2, P3). If P1≤PI<P2, then level 1 ([P1, P2)) can be used as the target heating level; if P2≤PI<P3, then level 2 ([P2, P3)) can be used as the target heating level.

[0068] In a specific implementation, to reduce unnecessary consumption, after step S303 in this embodiment, the following may also be included: If the heating power is not within the heating power range, and the available heating power is greater than the upper limit of the heating power range, then check whether the vehicle generator has been started. If the vehicle generator has been started, and the difference between the available heating power and the upper limit of the interval is greater than or equal to the power provided by the vehicle generator, then the vehicle generator is turned off, and the difference between the output power of the vehicle battery and the power provided by the vehicle generator is taken as the new output power of the vehicle battery. Then, the process of determining the available heating power based on the output power of the vehicle battery, the required power of the vehicle, and the emergency reserved power is returned if the vehicle mode is pure electric priority type. If the vehicle generator is not started, or if the vehicle generator is started and the difference between the available heating power and the upper limit of the range is less than the power provided by the vehicle generator, then the target heating level is set to the maximum value of the available heating levels.

[0069] It should be noted that if the available heating power is not within the heating power range and the available heating power is greater than the upper limit of the heating power range, it means that the battery has too much available power. For hybrid vehicles, this may be due to the vehicle generator being started to provide additional power. Therefore, it is possible to check whether the vehicle generator has been started.

[0070] In practical use, if the vehicle generator has started and the difference between the available heating power and the upper limit of the range is greater than or equal to the power provided by the vehicle generator, it indicates that the battery has excessive surplus power. This is caused by the vehicle generator providing additional power, and the excess power means that even if the vehicle generator is turned off, it can still support operation at the heating power corresponding to the maximum value of the gear level. In this case, to reduce unnecessary consumption, the vehicle generator can be turned off. To avoid incorrect judgment, the difference between the vehicle battery output power and the power provided by the vehicle generator can be used as the new vehicle battery output power. Then, return to the step of determining the available heating power based on the vehicle battery output power, the vehicle's required power, and the emergency reserve power if the vehicle mode is pure electric priority type, and re-judge.

[0071] If the vehicle's generator is not started, it means that the battery's available power surplus is not due to the generator providing additional power. In this case, no action is needed, and the target heating level can be directly set to the maximum value among the available heating levels.

[0072] If the vehicle generator has started and the difference between the available heating power and the upper limit of the range is less than the power provided by the vehicle generator, it means that although the battery has surplus available power at this time, it is due to the additional power provided by the vehicle generator. However, if the vehicle generator is turned off, it will be difficult to maintain the heating power corresponding to the maximum value of the gear level. If the vehicle generator is turned off at this time, it may cause the battery heating efficiency to decrease. Therefore, the vehicle generator can be left on without turning off, and the target heating level can be directly set to the maximum value of the available heating level. Of course, if battery heating efficiency is not considered and resource conservation is required, the vehicle generator can be turned off, and the difference between the output power of the vehicle battery and the power provided by the vehicle generator can be used as the new output power of the vehicle battery. Then, the process of determining the available heating power based on the vehicle battery output power, the required power of the vehicle, and the emergency reserve power if the vehicle mode is pure electric priority type can be re-evaluated. This embodiment does not impose any restrictions on this.

[0073] In a specific implementation, to ensure that the battery can be heated as much as possible, after step S303 in this embodiment, the following may also be included: If the vehicle is not within the heating power range and the available heating power is less than the lower limit of the heating power range, then the vehicle generator is started, and the sum of the output power of the vehicle battery and the power provided by the vehicle generator is used as the new output power of the vehicle battery. Then, the process of determining the available heating power based on the output power of the vehicle battery, the required power of the vehicle, and the emergency reserve power is returned if the vehicle mode is pure electric priority type.

[0074] It is understandable that if the available heating power is not within the heating power range, and the available heating power is less than the lower limit of the heating power range, it means that the battery output power, after supporting the necessary power output, can only provide too little power to the heating film, and cannot even support the lowest required heating level. In this case, if it is necessary to ensure that the battery can be heated as much as possible, the vehicle generator can be started to provide additional power. In order to reasonably determine the heating level that can be used after the vehicle generator is started, the sum of the vehicle battery output power and the power provided by the vehicle generator can be used as the new vehicle battery output power, and return to the step of determining the available heating power based on the vehicle battery output power, the vehicle required power, and the emergency reserved power if the vehicle mode is pure electric priority type.

[0075] In a specific implementation, the vehicle is also allowed to operate with hybrid priority. In this case, the control logic will differ. Based on this, after step S301 in this embodiment, the following may also be included: If the vehicle mode is hybrid priority type, then obtain the heating power of the gear corresponding to the maximum value of the gear level among the available heating gears of the vehicle; Calculate the sum of the heating power of the specified gear, the emergency reserve power, and the total power required by the vehicle to generate the required total power; Compare the output power of the vehicle battery with the total required power; If the output power of the vehicle battery is less than the total required power and the vehicle generator is not started, then the vehicle generator is started, and the sum of the power provided by the vehicle generator and the output power of the vehicle battery is taken as the new output power of the vehicle battery, and the process returns to the step of comparing the output power of the vehicle battery with the total required power. If the output power of the vehicle battery is greater than or equal to the total required power, the vehicle generator has been started, and the output power of the vehicle battery is greater than or equal to the sum of the total required power and the power provided by the vehicle generator, then the vehicle generator is turned off, the difference between the power provided by the vehicle generator and the output power of the vehicle battery is taken as the new output power of the vehicle battery, and the process returns to the step of comparing the output power of the vehicle battery and the total required power. If the output power of the vehicle battery is greater than or equal to the total required power and the vehicle generator is not started, or if the output power of the vehicle battery is greater than or equal to the total required power, the vehicle generator is started and the output power of the vehicle battery is less than the sum of the total required power and the power provided by the vehicle generator, then the target heating level is set to the maximum value of the available heating levels.

[0076] It should be noted that if the vehicle's overall mode is hybrid priority type, it means that the user prioritizes providing additional power to the battery through hybrid power. In this case, the heating efficiency of the battery can be guaranteed first. Therefore, the maximum value of the available heating level can be used as the target heating level.

[0077] Of course, even if the vehicle's generator is not started, the battery's output power may still maintain the heating film at the maximum value of the available heating level. In this case, further judgment is required. Therefore, the sum of the heating power of the level, the emergency reserve power, and the vehicle's required power can be calculated, and the calculated sum can be used as the total required power.

[0078] Understandably, if the output power of the vehicle battery is less than the total required power, it means that the battery output power cannot guarantee the operation of the heating film at the maximum value of the available heating level while maintaining the normal power requirements of the vehicle. In this case, the vehicle generator can be started to provide additional power. In order to reasonably determine the heating level that can be used after the vehicle generator is started, the sum of the vehicle battery output power and the power provided by the vehicle generator can be used as the new vehicle battery output power, and the process returns to the step of comparing the vehicle battery output power with the total required power.

[0079] If the output power of the vehicle battery is greater than or equal to the total required power, the vehicle generator has been started, and the output power of the vehicle battery is greater than or equal to the sum of the total required power and the power provided by the vehicle generator, it indicates that the battery has too much available power, and the vehicle generator has provided extra power. However, if there is too much extra power, even if the vehicle generator is turned off, it can still support the heating film to operate at the maximum heating power corresponding to the gear level. In this case, in order to reduce unnecessary consumption, the vehicle generator can be turned off. In order to avoid incorrect judgment, the difference between the output power of the vehicle battery and the power provided by the vehicle generator can be used as the new output power of the vehicle battery, and the process of comparing the output power of the vehicle battery and the total required power can be repeated. If the output power of the vehicle battery is greater than or equal to the total required power, and the vehicle alternator is not started, it means that the battery has surplus power, but it is not due to the vehicle alternator providing additional power. In this case, no processing is required, and the target heating level can be directly set to the maximum value of the available heating levels.

[0080] If the output power of the vehicle battery is greater than or equal to the total required power, the vehicle alternator has started, and the output power of the vehicle battery is less than the sum of the total required power and the power provided by the vehicle alternator, it means that there is surplus available power in the battery. Although this is due to the additional power provided by the vehicle alternator, if the vehicle alternator is turned off, it will be difficult to maintain the heating power corresponding to the maximum value of the heating level. If the vehicle alternator is turned off at this time, it may cause a decrease in battery heating efficiency. Therefore, the vehicle alternator can be left on without turning off, and the target heating level can be directly set to the maximum value of the available heating levels.

[0081] This embodiment provides a vehicle control method. Through reasonable calculation, this embodiment ensures that a suitable target heating level can be selected, and the vehicle generator can be reasonably controlled to start or stop according to changes in power, thereby further improving the vehicle's intelligence.

[0082] Based on the first embodiment of this application, in the third embodiment of this application, the content that is the same as or similar to that in the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 4 After step S10, steps S20'~S50' are also included: Step S20': If the vehicle operating condition category is the battery preheating category, then obtain the preheating temperature and the allowable heating time.

[0083] It should be noted that if the vehicle operating condition category is battery preheating, it means that the battery is actually being preheated at this time. In order to ensure reasonable heating and avoid repeated heating or overheating, the preheating temperature and allowable heating time can be obtained.

[0084] Among them, the preheating temperature can be the temperature value that needs to be increased during the preheating stage; the allowable heating time can be the available time during the preheating stage.

[0085] In practice, the preheating condition can be further divided according to the actual working conditions of the vehicle. In this case, the preheating condition can be further divided into two types: on-the-way preheating and preheating.

[0086] Among them, "on-the-go preheating" refers to the condition where the vehicle battery is preheated on the way to the charging location; "preheating in advance" refers to the condition where the vehicle battery is preheated in advance before the user makes a reservation to use the vehicle.

[0087] In practical applications, in order to accurately obtain the preheating rise temperature and the allowable heating time, the steps for obtaining the preheating rise temperature and the allowable heating time described in this embodiment may include: If the battery preheating category is in-transit preheating, the preheating increase temperature is determined based on the lowest cell temperature of the vehicle battery and the target charging temperature, and the time required to reach the target charging address is estimated to generate the allowable temperature rise time. If the battery preheating category is advance preheating, the preheating increase temperature is determined based on the lowest cell temperature of the vehicle battery and the target driving temperature, and the allowable temperature rise time is determined based on the current time and the time when preheating is completed.

[0088] It should be noted that if the battery preheating category is preheating in transit, then the lowest cell temperature of the vehicle battery can be used as the preheating temperature and the charging target temperature can be used as the preheating end temperature. Then, the absolute value of the difference between the two is calculated to obtain the preheating increase temperature. At the same time, the time required for the vehicle to reach the target charging address at normal driving speed or current driving speed can be determined according to the navigation software to obtain the allowable temperature rise time.

[0089] It should be noted that if the battery preheating category is advance preheating, then the lowest cell temperature of the vehicle battery can be used as the preheating temperature and the driving target temperature can be used as the preheating end temperature. Then, the absolute value of the difference between the two can be calculated to obtain the preheating increase temperature. At the same time, the time difference between the current time and the preheating completion time can be calculated to obtain the allowable temperature rise time.

[0090] The target charging temperature is the battery temperature that ensures optimal charging performance, and the target driving temperature is the battery temperature that ensures optimal driving efficiency. Both the target charging and driving temperatures can be preset by the vehicle control system administrator based on the battery characteristics. The target charging address can be the location information of the charging location set by the user, and the preheating completion time can be the scheduled vehicle pick-up time set by the user.

[0091] Step S30': Calculate the required temperature rise rate based on the preheating temperature and the allowable heating time.

[0092] Step S40': Compare the required temperature rise rate with the temperature rise rate corresponding to each heating level to determine the target heating level.

[0093] In practical use, the ratio of the preheating temperature to the allowable heating time can be used as the required temperature rise rate. Then, the heating level with a corresponding temperature rise rate greater than or equal to the required temperature rise rate and closest to the required temperature rise rate can be found, and the found heating level can be used as the target heating level.

[0094] Among them, the vehicle control equipment manager can pre-calibrate the temperature rise rate corresponding to each heating level, and can perform multiple calibrations according to different environments. For example, calibration can be performed for different humidity, illuminance, etc. When selecting the target heating level according to the required temperature rise rate, the temperature rise rate corresponding to each heating level can be found by combining the environmental parameters such as humidity and illuminance of the actual environment in which the vehicle is located, and then the target heating level can be selected based on the temperature rise rate.

[0095] Step S50': Control the side heating film and / or the bottom heating film to operate based on the target heating level to heat the battery.

[0096] Understandably, after determining the target heating level, the side heating film and / or bottom heating film can be controlled to operate according to the control method recorded in the target heating level in order to heat the vehicle battery.

[0097] In a specific implementation, to ensure charging efficiency, after step S10 in this embodiment, the following may also be included: If the vehicle operating condition category is charging condition, the surplus power at the charging pile end is determined based on the output power of the charging pile and the battery charging request power. The surplus power at the pile end is compared with the heating power of each heating level to determine the target heating level.

[0098] It should be noted that the output power of the charging pile can be the maximum output power that the charging pile can provide, which can be determined by the charging gun or by querying the charging pile's terminal equipment information through the network; the battery charging request power can be the power requested when the vehicle battery is charging.

[0099] In practical use, the difference between the output power of the charging pile and the requested charging power of the battery can be calculated. This difference is taken as the surplus power at the charging pile. Then, the surplus power at the charging pile is compared with the heating power of each heating level. The heating level whose heating power is less than the surplus power at the charging pile and whose heating power is closest to the surplus power at the charging pile is determined and taken as the target heating level.

[0100] This embodiment provides a vehicle control method. This embodiment ensures that, under preheating conditions, the target heating level can be reasonably selected to control each heating film, avoiding repeated heating or overheating.

[0101] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the vehicle control method of this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0102] This application also provides a vehicle control device applied to a vehicle, wherein side heating films are provided on both sides of the battery cell in the vehicle's on-board battery, and bottom heating film is provided at the bottom of the battery cell; Please refer to Figure 5 The vehicle control device includes: The determination module 10 is used to determine the vehicle operating condition category when the on-board battery meets the multi-level heating conditions; The acquisition module 20 is used to acquire the vehicle's required power and the output power of the on-board battery, and determine the emergency reserve power, if the vehicle's operating condition category is the low-temperature travel category. Calculation module 30 is used to determine the target heating level based on the vehicle's required power, the on-board battery's output power, and the emergency reserve power; The control module 40 is used to control the operation of the side heating film and / or the bottom heating film based on the target heating level to heat the battery.

[0103] The vehicle control device provided in this application, employing the vehicle control method described in the above embodiments, can solve the technical problems of related technologies where the heating film's coverage area is not reasonably set, and the heating film is not controlled according to operating conditions, resulting in unsatisfactory performance of the heating film in actual application to vehicle batteries. Compared with the prior art, the beneficial effects of the vehicle control device provided in this application are the same as those of the vehicle control method provided in the above embodiments, and other technical features in the vehicle control device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0104] This application provides a vehicle control device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform the vehicle control method in Embodiment 1 above.

[0105] The following is for reference. Figure 6 The diagram illustrates a structural schematic suitable for implementing vehicle control devices according to embodiments of this application. Vehicle control devices in embodiments of this application may include, but are not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 6 The vehicle control device shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of this application.

[0106] like Figure 6 As shown, the vehicle control device may include a processing unit 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory 1002 or a program loaded from a storage device 1003 into a random access memory 1004. The random access memory 1004 also stores various programs and data required for the operation of the vehicle control device. The processing unit 1001, the read-only memory 1002, and the random access memory 1004 are interconnected via a bus 1005. An input / output interface 1006 is also connected to the bus. Typically, the following systems can be connected to the input / output interface 1006: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. Communication device 1009 allows the vehicle control equipment to communicate wirelessly or wiredly with other devices to exchange data. Although the figures show vehicle control equipment with various systems, it should be understood that implementation or possession of all the systems shown is not required. More or fewer systems may be implemented alternatively.

[0107] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from read-only memory 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0108] The vehicle control device provided in this application, employing the vehicle control method described in the above embodiments, can solve the technical problems of related technologies where the heating film's coverage area is not reasonably set, and the heating film is not controlled according to operating conditions, resulting in unsatisfactory performance of the heating film in actual application to vehicle batteries. Compared with the prior art, the beneficial effects of the vehicle control device provided in this application are the same as those of the vehicle control method provided in the above embodiments, and other technical features of this vehicle control device are the same as those disclosed in the previous embodiment method, and will not be repeated here.

[0109] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0110] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0111] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the vehicle control method in the above embodiments.

[0112] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0113] The aforementioned computer-readable storage medium may be included in the vehicle control equipment; or it may exist independently and not be installed in the vehicle control equipment.

[0114] The aforementioned computer-readable storage medium carries one or more programs that, when executed by a vehicle control device, cause the vehicle control device to: determine the vehicle operating condition category when the on-board battery meets the multi-level heating conditions; if the vehicle operating condition category is a low-temperature travel category, obtain the vehicle's required power and the on-board battery's output power, and determine the emergency reserve power; determine the target heating level based on the vehicle's required power, the on-board battery's output power, and the emergency reserve power; and control the side heating film and / or the bottom heating film to operate based on the target heating level to heat the battery.

[0115] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof. These programming languages ​​include object-oriented programming languages—such as Python, Java, Smalltalk, and C++—and conventional procedural programming languages—such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0116] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0117] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0118] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described vehicle control method. This addresses the technical problem in related technologies where the heating film's coverage area is not properly set, and the heating film is not controlled according to operating conditions, resulting in unsatisfactory performance when actually applied to vehicle batteries. Compared to the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the vehicle control method provided in the above embodiments, and will not be elaborated upon here.

[0119] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the vehicle control method described above.

[0120] The computer program product provided in this application can solve the technical problem that related technologies do not reasonably set the coverage area of ​​the heating film and do not consider controlling the heating film according to the operating conditions, resulting in the heating film's actual application on vehicle batteries not being ideal. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the vehicle control method provided in the above embodiments, and will not be repeated here.

[0121] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. All equivalent structural transformations made under the technical concept of this application and using the content of this application specification and drawings, or direct / indirect applications in other related technical fields, are included in the scope of protection of this application.

Claims

1. A vehicle control method, characterized in that, Applied to vehicles, the vehicle's on-board battery has side heating films on both sides of the battery cell and bottom heating film on the bottom of the battery cell; The vehicle control method includes: When the on-board battery meets the multi-level heating conditions, determine the vehicle operating condition category; If the vehicle operating condition category is low-temperature travel, then obtain the vehicle's required power and the on-board battery output power, and determine the emergency reserve power; The target heating level is determined based on the vehicle's required power, the on-board battery's output power, and the emergency reserve power. The side heating film and / or the bottom heating film are controlled to operate based on the target heating level in order to heat the battery.

2. The vehicle control method as described in claim 1, characterized in that, Determining the target heating level based on the vehicle's required power, the vehicle battery's output power, and the emergency reserve power includes: Obtain the vehicle's overall mode; If the vehicle mode is pure electric priority, the available heating power is determined based on the output power of the on-board battery, the required power of the vehicle, and the emergency reserved power. Detect whether the available heating power is within the heating power range; If it is within the heating power range, the heating power range is divided into multiple power sub-ranges according to the heating power of each available heating gear of the vehicle. The available heating power is matched with the plurality of power sub-intervals to determine the target power sub-interval; The heating level corresponding to the target power sub-range is taken as the target heating level.

3. The vehicle control method as described in claim 2, characterized in that, Before detecting whether the available heating power is within the heating power range, the method further includes: Obtain the maximum and minimum values ​​of each available heating level in the vehicle; The heating power corresponding to the maximum value of the gear level is taken as the upper limit of the interval, and the heating power corresponding to the minimum value of the gear level is taken as the lower limit of the interval. The heating power range is constructed based on the upper limit and the lower limit of the range.

4. The vehicle control method as described in claim 2, characterized in that, After detecting whether the available heating power is within the heating power range, the method further includes: If the heating power is not within the heating power range, and the available heating power is greater than the upper limit of the heating power range, then check whether the vehicle generator has been started. If the vehicle generator has been started, and the difference between the available heating power and the upper limit of the interval is greater than or equal to the power provided by the vehicle generator, then the vehicle generator is turned off, and the difference between the output power of the vehicle battery and the power provided by the vehicle generator is taken as the new output power of the vehicle battery. Then, the process of determining the available heating power based on the output power of the vehicle battery, the required power of the vehicle, and the emergency reserved power is returned if the vehicle mode is pure electric priority type. If the vehicle generator is not started, or if the vehicle generator is started and the difference between the available heating power and the upper limit of the range is less than the power provided by the vehicle generator, then the target heating level is set to the maximum value of the available heating levels.

5. The vehicle control method as described in claim 2, characterized in that, After detecting whether the available heating power is within the heating power range, the method further includes: If the vehicle is not within the heating power range and the available heating power is less than the lower limit of the heating power range, then the vehicle generator is started, and the sum of the output power of the vehicle battery and the power provided by the vehicle generator is used as the new output power of the vehicle battery. Then, the process of determining the available heating power based on the output power of the vehicle battery, the required power of the vehicle, and the emergency reserve power is returned if the vehicle mode is pure electric priority type.

6. The vehicle control method as described in claim 2, characterized in that, After obtaining the vehicle's overall mode, the process also includes: If the vehicle mode is hybrid priority type, then obtain the heating power of the gear corresponding to the maximum value of the gear level among the available heating gears of the vehicle; Calculate the sum of the heating power of the specified gear, the emergency reserve power, and the total power required by the vehicle to generate the required total power; Compare the output power of the vehicle battery with the total required power; If the output power of the vehicle battery is less than the total required power and the vehicle generator is not started, then the vehicle generator is started, and the sum of the power provided by the vehicle generator and the output power of the vehicle battery is taken as the new output power of the vehicle battery, and the process returns to the step of comparing the output power of the vehicle battery with the total required power. If the output power of the vehicle battery is greater than or equal to the total required power, the vehicle generator has been started, and the output power of the vehicle battery is greater than or equal to the sum of the total required power and the power provided by the vehicle generator, then the vehicle generator is turned off, the difference between the power provided by the vehicle generator and the output power of the vehicle battery is taken as the new output power of the vehicle battery, and the process returns to the step of comparing the output power of the vehicle battery and the total required power. If the output power of the vehicle battery is greater than or equal to the total required power and the vehicle generator is not started, or if the output power of the vehicle battery is greater than or equal to the total required power, the vehicle generator is started and the output power of the vehicle battery is less than the sum of the total required power and the power provided by the vehicle generator, then the target heating level is set to the maximum value of the available heating levels.

7. The vehicle control method according to any one of claims 1-6, characterized in that, After determining the vehicle operating condition category when the on-board battery meets the multi-level heating conditions, the process also includes: If the vehicle operating condition category is the battery preheating category, then obtain the preheating temperature and the allowable heating time; Calculate the required temperature rise rate based on the preheating temperature and the allowable heating time. The required temperature rise rate is compared with the temperature rise rate corresponding to each heating level to determine the target heating level; The side heating film and / or the bottom heating film are controlled to operate based on the target heating level in order to heat the battery.

8. The vehicle control method as described in claim 7, characterized in that, The battery preheating categories include preheating in transit and preheating in advance; The acquisition of the preheating temperature and the allowable heating time includes: If the battery preheating category is in-transit preheating, the preheating increase temperature is determined based on the lowest cell temperature of the vehicle battery and the target charging temperature, and the time required to reach the target charging address is estimated to generate the allowable temperature rise time. If the battery preheating category is advance preheating, the preheating increase temperature is determined based on the lowest cell temperature of the vehicle battery and the target driving temperature, and the allowable temperature rise time is determined based on the current time and the time when preheating is completed.

9. A vehicle control device, characterized in that, Applied to vehicles, the vehicle's on-board battery has side heating films on both sides of the battery cell and bottom heating film on the bottom of the battery cell; The vehicle control device includes: The determination module is used to determine the vehicle operating condition category when the on-board battery meets the multi-level heating conditions; The acquisition module is used to acquire the vehicle's required power and the output power of the on-board battery, and determine the emergency reserve power, if the vehicle's operating condition category is the low-temperature travel category. The calculation module is used to determine the target heating level based on the vehicle's required power, the on-board battery's output power, and the emergency reserve power. The control module is used to control the operation of the side heating film and / or the bottom heating film based on the target heating level, so as to heat the battery.

10. A vehicle control device, characterized in that, The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the vehicle control method as described in any one of claims 1 to 8.

11. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the vehicle control method as described in any one of claims 1 to 8.

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