Battery thermal management control method and apparatus, device, and computer storage medium

Abstract

A battery thermal management control method and apparatus, a device, and a computer storage medium, relating to the technical field of new energy vehicles. The method comprises: acquiring target charging pile information and operation parameters of a vehicle, and battery loss parameters of a power battery; on the basis of the operation parameters, the battery loss parameters, and maximum charging power of a target charging pile, respectively determining a temperature estimated value of the power battery and a first electricity loss and a charging temperature threshold when the current vehicle arrives at the target charging pile; and determining a target heating mode of the vehicle on the basis of the acquired data information, and controlling the vehicle to heat the power battery on the basis of the target heating mode. The method can more accurately determine whether the power battery needs to be heated in a low-temperature environment, so that the danger of high-power charging of the power battery in the low-temperature environment is reduced and the power performance of the vehicle is improved, thereby improving not only the working efficiency of the power battery during charging but also the vehicle usage experience of the user in winter.

Description

Battery thermal management control method, device, equipment and computer storage medium

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on October 30, 2023, with application number 202311427839.9 and application name “Control method, device, equipment and computer storage medium for battery thermal management”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of new energy vehicle technology, and in particular to a battery thermal management control method, device, equipment, and computer storage medium. Background Art

[0003] The electrification of vehicles has become an inevitable trend in the industry. With the rapid development of new energy vehicles, industry upgrades, and policy support, pure electric vehicles are gaining increasing favor among consumers. Compared to traditional fuel vehicles, electric vehicles offer faster torque response, more stable power output, lower noise levels, and significantly superior handling and driving performance. Furthermore, new energy vehicles emit no pollutants and contribute little to air pollution during operation.

[0004] The power batteries of existing electric vehicles are greatly affected by battery temperature. The internal resistance of the power battery will increase in a low temperature environment, resulting in a decrease in battery discharge power and a significant decrease in vehicle power. The charging power of the power battery will also decrease at low temperatures, resulting in a significant decrease in the charging speed of the electric vehicle.

[0005] Therefore, when the charging and discharging power of new energy vehicles is reduced due to the low temperature of the power battery, how to control the temperature of the power battery of the new energy vehicle to maintain it at an appropriate temperature to increase the vehicle's power is a problem that needs to be solved at present.

[0006] Summary of the Invention

[0007] The present application provides a battery thermal management control method, device, equipment and computer storage medium to solve the defect that the charging and discharging power of the power battery of new energy vehicles in low temperature environment is lower than that in normal temperature environment, thereby causing the vehicle's power to decline.

[0008] In a first aspect, the present application provides a method for controlling battery thermal management, comprising:

[0009] Obtaining target charging station information for the vehicle, operating parameters of the vehicle, and battery loss parameters of the power battery. The target charging station information includes: distance information between the vehicle and the target charging station and the maximum charging power of the target charging station. The operating parameters are used to indicate data information that can be detected during the operation of the vehicle.

[0010] Determining a first power consumption of the vehicle when it reaches a target charging pile based on the operating parameter and the battery loss parameter;

[0011] determining, based on the operating parameters and the maximum charging power, an estimated temperature of the power battery and a charging temperature threshold of the power battery when the vehicle arrives at a target charging pile;

[0012] A target heating mode for the vehicle is determined according to the first power loss, the estimated temperature value, and the charging temperature threshold, and the vehicle is controlled to heat the power battery according to the target heating mode.

[0013] Optionally, the operating parameters include: heat generation power and current operating temperature of the power battery, and determining, based on the operating parameters and the maximum charging power, an estimated temperature of the power battery and a charging temperature threshold of the power battery when the vehicle arrives at a target charging pile, includes:

[0014] Determining a preset time for the vehicle to reach the target charging station based on the distance information;

[0015] Determining, based on the preset time and the heating power, how much heat the battery generates when the vehicle reaches the target charging station;

[0016] Determining an estimated temperature of the power battery when the vehicle arrives at a target charging station based on the current operating temperature and the heat generated by the battery;

[0017] A charging temperature threshold of the power battery is determined according to the maximum charging power.

[0018] Optionally, the operating parameter includes: a current standard power of the vehicle. Before determining the target heating mode of the vehicle based on the first power loss, the estimated temperature, and the charging temperature threshold, the method further includes:

[0019] determining a current actual power level of the vehicle according to the battery loss parameter and the current standard power level;

[0020] The difference between the current actual power and the first power loss is used as the estimated remaining power of the vehicle.

[0021] Optionally, determining the target heating mode of the vehicle according to the first power loss, the estimated temperature, and the charging temperature threshold includes:

[0022] determining whether the estimated remaining power is less than a remaining power threshold of the vehicle;

[0023] If the estimated remaining power is not less than the remaining power threshold of the vehicle, determining whether the estimated temperature value is less than the charging temperature threshold;

[0024] When the estimated temperature value is less than the charging temperature threshold, sending a first operation request to the vehicle and controlling the vehicle to activate a battery thermal management function, wherein the first operation request is used to instruct to increase the temperature of the power battery;

[0025] Obtaining a target heating power corresponding to the battery thermal management function;

[0026] A target heating mode for operating the battery thermal management function is determined according to the target heating power.

[0027] Optionally, obtaining a target heating power corresponding to the battery thermal management function includes:

[0028] Obtaining a heating module for the power battery, wherein the heating module includes: a first heating module, a second heating module, and a third heating module;

[0029] determining a first heating power corresponding to the first heating module according to the first heating module;

[0030] determining a second heating power corresponding to the second heating module according to the second heating module;

[0031] determining a third heating power corresponding to the third heating module according to the third heating module;

[0032] A target heating power corresponding to the battery thermal management function is determined according to the first heating power, the second heating power, the third heating power, and the preset duration.

[0033] Optionally, determining a target heating power corresponding to the battery thermal management function according to the first heating power, the second heating power, the third heating power, and the preset duration includes:

[0034] determining a temperature difference required by the power battery according to the temperature estimate and the charging temperature threshold;

[0035] determining a target heat requirement of the power battery according to the temperature difference and the preset time;

[0036] determining, based on the first heating power and the preset duration, a first amount of heat generated by the first heating module within the preset duration, and determining whether the first amount of heat reaches the target amount of heat;

[0037] If the first heat reaches the target heat, determining the first heat as the target heat;

[0038] If the first heat amount does not reach the target heat amount, determining the second heat amount generated by the first heating module and the second heating module within the preset time period according to the first heating power, the second heating power, and the preset time period, and determining whether the second heat amount reaches the target heat amount;

[0039] If the second heat reaches the target heat, determining the second heat as the target heat;

[0040] If the second heat amount does not reach the target heat amount, determining a third heat amount generated by the first heating module, the second heating module, and the third heating module within the preset time period based on the first heating power, the second heating power, the third heating power, and the preset time period, and determining the third heat amount to be the target heat amount;

[0041] A target heating power corresponding to the battery thermal management function is determined according to the target heat amount.

[0042] Optionally, after controlling the vehicle to heat the power battery according to the target heating mode, the method further includes:

[0043] Re-acquiring an estimated remaining power of the vehicle, and determining whether the estimated remaining power is less than a remaining power threshold of the vehicle;

[0044] When the estimated remaining power is less than the remaining power threshold, a second operation request is sent to the vehicle, and the vehicle is controlled to turn off the battery thermal management function, where the second operation request is used to instruct to stop heating the power battery.

[0045] In a second aspect, the present application provides a battery thermal management control device, comprising:

[0046] An acquisition module is used to obtain the target charging pile information of the vehicle, the operating parameters of the vehicle, and the battery loss parameters of the power battery. The target charging pile information includes: the distance information between the vehicle and the target charging station and the maximum charging power of the target charging station. The operating parameters are used to indicate the data information that can be detected during the operation of the vehicle.

[0047] A determination module is used to determine a first power loss of the vehicle when it reaches the target charging pile based on the operating parameters and the battery loss parameter.

[0048] The determination module is further configured to determine, based on the operating parameters and the maximum charging power, an estimated temperature of the power battery and a charging temperature threshold of the power battery when the vehicle arrives at a target charging pile.

[0049] The determination module is further configured to determine a target heating mode for the vehicle based on the first power loss, the estimated temperature value, and the charging temperature threshold.

[0050] A control module is used to control the vehicle to heat the power battery according to the target heating mode.

[0051] Optionally, the determination module is further used to determine a preset time for the vehicle to reach the target charging pile based on the distance information.

[0052] The determination module is further configured to determine the amount of heat generated by the battery when the vehicle reaches the target charging pile based on the preset time and the heating power.

[0053] The determination module is further configured to determine an estimated temperature of the power battery when the vehicle arrives at a target charging pile based on the current operating temperature and the heat generated by the battery.

[0054] The determining module is further configured to determine a charging temperature threshold of the power battery according to the maximum charging power.

[0055] Optionally, the determination module is further used to determine the current actual power of the vehicle based on the battery loss parameter and the current standard power.

[0056] The determination module is further configured to use the difference between the current actual power and the first power loss as the estimated remaining power of the vehicle.

[0057] Optionally, the battery thermal management control device further includes: a judgment module.

[0058] The judgment module is used to judge whether the estimated remaining power is less than a remaining power threshold of the vehicle.

[0059] If the estimated remaining power is not less than the remaining power threshold of the vehicle, the judgment module is further configured to judge whether the estimated temperature value is less than the charging temperature threshold.

[0060] The battery thermal management control device further includes: a sending module.

[0061] The sending module is configured to send a first operation request to the vehicle when the estimated temperature value is less than the charging temperature threshold, wherein the first operation request is used to instruct to increase the temperature of the power battery.

[0062] The control module is also used to control the vehicle to enable a battery thermal management function.

[0063] The acquisition module is further configured to acquire a target heating power corresponding to the battery thermal management function.

[0064] The determination module is further configured to determine a target heating mode for the battery thermal management function according to the target heating power.

[0065] Optionally, the acquisition module is further used to acquire a heating module of the power battery, where the heating module includes: a first heating module, a second heating module and a third heating module.

[0066] The determining module is further configured to determine a first heating power corresponding to the first heating module according to the first heating module.

[0067] The determining module is further configured to determine a second heating power corresponding to the second heating module according to the second heating module.

[0068] The determining module is further configured to determine a third heating power corresponding to the third heating module according to the third heating module.

[0069] The determination module is further configured to determine a target heating power corresponding to the battery thermal management function according to the first heating power, the second heating power, the third heating power, and the preset duration.

[0070] Optionally, the determination module is further configured to determine a temperature difference required by the power battery based on the temperature estimate and the charging temperature threshold.

[0071] The determination module is further configured to determine a target heat quantity required by the power battery according to the temperature difference and the preset time.

[0072] The determining module is further configured to determine a first amount of heat generated by the first heating module within the preset time period based on the first heating power and the preset time period.

[0073] The judgment module is further configured to judge whether the first heat reaches the target heat.

[0074] If the first heat reaches the target heat, the determining module is further configured to determine that the first heat is the target heat.

[0075] If the first heat does not reach the target heat, the determination module is further used to determine the second heat generated by the first heating module and the second heating module within the preset time period based on the first heating power, the second heating power and the preset time period.

[0076] The judging module is further configured to judge whether the second heat reaches the target heat.

[0077] If the second heat reaches the target heat, the determining module is further configured to determine that the second heat is the target heat.

[0078] If the second heat does not reach the target heat, the determination module is further used to determine the third heat generated by the first heating module, the second heating module and the third heating module within the preset time period based on the first heating power, the second heating power, the third heating power and the preset time period, and determine that the third heat is the target heat.

[0079] The determination module is further configured to determine a target heating power corresponding to the battery thermal management function according to the target heat amount.

[0080] Optionally, the acquisition module is further used to re-acquire the estimated remaining power of the vehicle.

[0081] The judgment module is further configured to judge whether the estimated remaining power is less than a remaining power threshold of the vehicle.

[0082] The sending module is further configured to send a second operation request to the vehicle when the estimated remaining power is less than the remaining power threshold, wherein the second operation request is configured to instruct to stop heating the power battery.

[0083] The control module is further used to control the vehicle to turn off the battery thermal management function.

[0084] In a third aspect, the present application provides a battery thermal management control device, comprising:

[0085] Memory;

[0086] processor;

[0087] wherein the memory stores computer-executable instructions;

[0088] The processor executes the computer-executable instructions stored in the memory to implement the battery thermal management control method as described in the first aspect and various possible implementations of the first aspect.

[0089] In a fourth aspect, the present application provides a computer storage medium having computer execution instructions stored thereon, wherein the computer execution instructions are executed by a processor to implement the battery thermal management control method as described in the first aspect and various possible implementations of the first aspect.

[0090] The battery thermal management control method provided by the present application obtains the target charging pile information of the vehicle, the operating parameters of the vehicle, and the battery loss parameters of the power battery; determines the first power loss generated when the current vehicle reaches the target charging pile based on the operating parameters and the battery loss parameters; determines the temperature estimate and charging temperature threshold of the power battery when the vehicle reaches the target charging pile based on the operating parameters and the maximum charging power of the target charging pile; determines the target heating mode of the current vehicle based on the first power loss, the temperature estimate, and the charging temperature threshold, and controls the current vehicle to heat the power according to the target heating mode. This method can more accurately determine whether the power battery is heated in a low-temperature environment, reduces the danger of high-power charging of the power battery in a low-temperature environment, improves the power of the vehicle, optimizes the thermal management function of the vehicle in a low-temperature environment, and not only improves the working efficiency of the power battery during charging and discharging, but also improves the user's car experience in winter. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0092] FIG1 is a flow chart of a method for controlling battery thermal management according to the present invention;

[0093] FIG2 is a second flow chart of the battery thermal management control method provided in this application;

[0094] FIG3 is a schematic structural diagram of a battery thermal management control device provided in this application;

[0095] FIG4 is a schematic diagram of the structure of the battery thermal management control device provided in this application.

[0096] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0097] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions in this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0098] The terms "first," "second," "third," "fourth," and so forth (if any) in the description and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequential sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present invention described herein can, for example, be implemented in sequences other than those illustrated or described herein.

[0099] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0100] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of relevant countries and regions, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0101] The electrification of vehicles has become an inevitable trend in the industry. With the rapid development of new energy vehicles, industry upgrades, and policy support, pure electric vehicles are gaining increasing favor among consumers. Compared to traditional fuel vehicles, electric vehicles offer advantages such as faster torque response, stable power output, low noise, and significantly superior handling and driving performance. Furthermore, new energy vehicles emit no pollutants and contribute to air pollution. However, electric vehicle power batteries are significantly affected by battery temperature.

[0102] In existing technologies, the charge and discharge power of new energy vehicles' power batteries at low temperatures is lower than at normal temperatures. The lower the battery temperature, the lower the charging power and the slower the charging speed. Furthermore, high-power charging at low temperatures can easily lead to lithium deposition, increasing battery safety risks. Furthermore, the internal resistance of power batteries increases at low temperatures, reducing the battery discharge power. As the battery discharge power decreases, the vehicle's dynamics deteriorates, resulting in a very poor winter driving experience for users.

[0103] Therefore, how to control the thermal management of the power battery of new energy vehicles in winter so that the temperature of the power battery can be quickly raised to an appropriate range when users use the vehicle in a low temperature environment to increase the vehicle's power is the problem that needs to be solved at present.

[0104] In response to the above problems, the present application provides a control method for battery thermal management.

[0105] First, the implementation scenarios involved in this application are described.

[0106] New energy technologies are the backbone of high technology, encompassing nuclear energy, solar energy, coal-fired power generation, magnetohydrodynamic power generation, geothermal energy, and ocean energy. Nuclear and solar energy are the primary hallmarks of new energy technologies. Their development and utilization have transformed the traditional energy concept, dominated by oil and coal, and ushered in a new era of energy. As global environmental awareness continues to rise, new energy vehicles, as an environmentally friendly, low-carbon, and energy-saving mode of transportation, are gaining increasing favor among consumers.

[0107] In the prior art, most new energy vehicles use power batteries to power the vehicle. However, these batteries are significantly affected by battery temperature. In low-temperature environments, they will reduce charging power during charging and discharging, resulting in a significant decrease in charging speed and vehicle power. Therefore, the power battery temperature needs to be adjusted according to the actual driving conditions of the vehicle. The vehicle involved in this application may, for example, be a new energy vehicle equipped with a battery thermal management function.

[0108] For example, when a new energy vehicle is driving in a low-temperature environment, the operating temperature of the battery cannot meet the maximum charge and discharge power of the battery, thereby reducing the power of the new energy vehicle. At this time, it is necessary to heat the battery according to the operating temperature to achieve the purpose of improving the battery's working efficiency.

[0109] The present application provides a method for controlling battery thermal management. Before a vehicle arrives at a charging station, the method corrects the remaining power of the battery according to the current degree of loss of the power battery, and then determines whether to heat the power battery based on the corrected remaining power and the power consumption value at the time of arrival at the charging station. After determining that the power battery is to be heated, the method intelligently controls the timing of starting heat pump heating, PTC heating, and motor heating based on the current temperature of the power battery, the current optimal charging temperature of the power battery, the heat pump heating rate, the motor heating rate, and the PTC heating rate, so that the battery temperature of the power battery can be heated to an appropriate temperature before the vehicle arrives at the charging station. At the same time, the timing and duration of starting heat pump, PTC, and motor heating are reasonably controlled. This method can more accurately determine whether to heat the power battery in a low-temperature environment, reduce the danger of high-power charging of the power battery in a low-temperature environment, improve the power performance of the vehicle, optimize the thermal management function of the vehicle in a low-temperature environment, and not only improve the working efficiency of the power battery during charging and discharging, but also improve the user's winter driving experience.

[0110] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0111] FIG1 is a flow chart of a method for controlling battery thermal management according to an embodiment of the present application. The execution subject of this embodiment may be, for example, a battery management system (BMS). As shown in FIG1 , the method for controlling battery thermal management according to this embodiment includes:

[0112] S101: Obtain target charging pile information of a vehicle, operating parameters of the vehicle, and battery loss parameters of a power battery.

[0113] Among them, the target charging pile information includes: the distance information between the vehicle and the target charging station and the maximum charging power of the target charging station; the operating parameters are used to indicate the data information that can be detected during the operation of the vehicle; and the battery loss parameters are used to indicate the health of the power battery.

[0114] It is understood that operating parameters are data and information about the power battery that can be detected during the current vehicle operation, and this data and information are data that continuously changes with the increase in vehicle driving time. Operating parameters include: the vehicle's real-time energy consumption, the current operating temperature of the power battery, and the heat power of the power battery. The vehicle itself is equipped with a corresponding detection system that can perform real-time detection of the vehicle's operating parameters. Therefore, the BMS can obtain the current vehicle operating parameters in real time. The battery loss parameter is related to the current vehicle's age and can be detected by the vehicle's detection system. This embodiment does not impose any special restrictions on operating parameters.

[0115] According to the current destination of the vehicle, that is, the target charging pile, different driving routes can be provided for the user. According to the driving route determined by the current user, the distance information between the current vehicle and the target charging station can be obtained; the distance information can be obtained through the positioning system configured in the current vehicle, and the positioning system can reflect the distance information between the current vehicle and the target charging pile in real time; the maximum charging power is the maximum charging power that can be provided for the vehicle's power battery at the target charging station currently determined by the user, and the maximum charging power matches the charging power of the current power battery, thereby providing the user with a fast charging experience and improving the user's usage experience.

[0116] Through the detection system set up by the vehicle itself, the BMS obtains the current vehicle operating parameters and the battery loss parameters of the power battery in real time, and obtains the corresponding distance parameters through the positioning system configured in the current vehicle and the target charging pile selected by the user.

[0117] For example, the operating parameters obtained by the BMS include: the current real-time energy consumption of the vehicle is 0.15 degrees / km, the heating power of the power battery can be 1kw, and the current operating temperature of the power battery can be detected to be 5°C; the current battery loss parameter of the vehicle is 5 years, the distance information between the vehicle and the target charging pile is 40km, and the maximum charging power of the target charging pile is 120kw.

[0118] S102: Determine a first power consumption of the vehicle when it reaches the target charging pile based on the operating parameter and the battery loss parameter.

[0119] The first power loss is used to indicate the actual power consumed by the power battery when the vehicle reaches the target charging pile.

[0120] It can be understood that the battery loss parameter actually reflects the current energy storage status of the power battery. The battery loss parameter reflects the actual energy storage status of the power battery through the length of time the power battery continues to be used. From this, it can be determined that there is a correlation between the battery loss parameter and the service life of the power battery.

[0121] According to the currently determined distance parameter and the real-time energy consumption of the vehicle, the two are calculated and processed to obtain the corresponding power battery power consumption; according to the currently obtained battery loss parameter, the relationship between the current power and the actual energy storage of the power battery can be obtained. According to this correlation, the currently obtained power battery power consumption is processed to obtain the first power loss of the current vehicle when it reaches the target charging pile.

[0122] For example, if the current battery loss parameter of the vehicle is 5 years, the power battery's energy attenuation rate is 20%; the standard total power of the power battery when it leaves the factory is 100 kWh, then the current total power of the power battery is 100*(1-20%)=80 kWh; if the battery energy consumption is 0.15 kWh / km, the distance to the charging station is 40 km, and the vehicle consumes 6 kWh of electricity when it reaches the charging station, the proportion of the power required for the vehicle to reach the charging station to the current total power is 6 / 80=7.5%. At this time, the first power loss currently obtained is 7.5%.

[0123] S103: Determine, based on the operating parameters and the maximum charging power, an estimated temperature of the power battery and a charging temperature threshold of the power battery when the vehicle arrives at a target charging pile.

[0124] Among them, the temperature estimate is used to indicate the battery temperature of the power battery when the vehicle arrives at the target charging pile, and the charging temperature threshold is used to indicate the corresponding operating temperature when the power battery of the current vehicle can reach the maximum charging power during the charging process.

[0125] It can be understood that during the driving process of the vehicle, the power battery can provide power for the vehicle so that it can drive normally; when the power battery provides electricity for the vehicle to travel, the power battery continues to discharge, and the discharge current will cause the temperature of the power battery to rise. At this time, the power that causes the power battery's own temperature to rise during discharge is regarded as the heat power of the power battery.

[0126] After determining the current power battery heating power, the distance between the vehicle and the target charging station is determined based on the vehicle's current destination (i.e., the target charging station). Based on the current operating temperature of the power battery, the operating temperature of the power battery is estimated after the vehicle has traveled a corresponding distance at the power battery heating power, resulting in an estimated power battery temperature when the vehicle arrives at the target charging station. Based on the target charging station selected by the user, the maximum charging power provided by the target charging station is determined. Based on this maximum charging power, the current power battery charging temperature threshold is determined, thereby improving the charging efficiency of the power battery during the charging process and reducing the time required for the user to charge the vehicle.

[0127] It is understandable that when a power battery is charged at high power in a low-temperature environment, it is easy for the power battery to deposit lithium, thereby increasing the danger of the battery. In addition, the internal resistance of the power battery increases in a low-temperature environment, resulting in a decrease in the charging and discharging power of the power battery. Therefore, in order to reduce the safety hazards when the vehicle is charged at the maximum charging power in a low-temperature environment, and to ensure the charging efficiency of the vehicle, the operating temperature of the power battery needs to be adjusted to ensure that when the vehicle arrives at the target charging pile, the operating temperature of the power battery is consistent with the operating temperature corresponding to the current highest charging efficiency of the vehicle.

[0128] For example, the heating power of the power battery can be 1kw, the current operating temperature of the power battery can be detected to be 5°C, the current distance information between the vehicle and the target charging pile is 40km, and after estimating the operating temperature of the power battery, the estimated temperature value T1°C is obtained; the currently determined maximum charging power of the target charging pile is 120kw, then the corresponding charging temperature threshold of the vehicle power battery can be 25°C.

[0129] S104: Determine a target heating mode for the vehicle according to the first power loss, the estimated temperature value, and the charging temperature threshold, and control the vehicle to heat the power battery according to the target heating mode.

[0130] The target heating mode is used to instruct heating of the power battery according to multiple heating modules configured inside the vehicle.

[0131] Understandably, power batteries will reduce charging power during both low and high temperature conditions, resulting in a significant decrease in charging speed and vehicle performance. Therefore, by adjusting the power battery temperature to an appropriate range, vehicle performance can be improved, thereby enhancing the user experience. However, when the battery thermal management function is enabled, it consumes the vehicle's stored energy and accelerates the energy consumption of the power battery. To ensure that the vehicle can travel at least a fixed distance upon arrival at the target charging station, in case of an emergency inability to move the vehicle, it is necessary to reserve enough power for the current vehicle to travel a fixed distance.

[0132] The currently acquired operating parameters of the vehicle also include: the current standard power, which is used to indicate the power value displayed on the vehicle display interface; based on the first power loss required for the vehicle to reach the currently determined target charging station and the current standard power, the power of the vehicle after reaching the target charging station can be estimated; and it is determined whether the power can support the vehicle to continue normal driving after arriving at the target charging station; since the heating treatment of the power battery is also based on the power value of the vehicle, if the power value estimated based on the first power loss and the current standard power can support the vehicle to travel a fixed distance after arriving at the target charging station, it indicates that the current vehicle has excess power to support the heating treatment of the power battery; otherwise, it indicates that the current vehicle does not have excess power to heat the power battery.

[0133] After determining that the current vehicle has excess power to support heating of the power battery, the operating temperature of the power battery when the vehicle arrives at the target charging pile, that is, the temperature estimate, is determined based on the currently obtained temperature estimate, and the temperature estimate is compared with the charging temperature threshold; based on the comparison result, it can be determined whether the current vehicle needs to start the heating module to heat the power battery; after determining that the power battery needs to be heated, multiple heating modules are matched based on the difference between the temperature estimate and the charging temperature threshold, and a suitable heating mode is selected from them, so that when the vehicle arrives at the target charging pile, the operating temperature of the power battery is consistent with the charging temperature threshold, and the corresponding heating mode is determined as the target heating mode of the current vehicle, and the vehicle is controlled to heat the power battery according to the target heating mode.

[0134] For example, the fixed distance that the vehicle can travel after arriving at the target charging station is 20km, and the current real-time energy consumption is 0.15 degrees / km, then the actual power consumption is 3 degrees; if the current vehicle power battery requires 100 degrees of electricity to be fully charged, then the actual power to be reserved should be 3%; if the estimated power value is greater than 3%, it means that the current power can support the vehicle to travel a fixed distance after arriving at the target charging station, and the power battery can be heated at this time; if the current vehicle is equipped with a first heating module and a second heating module, the current vehicle power battery charging temperature threshold is 25 degrees, and the currently obtained temperature estimate is When the temperature is T1°C and T1°C is less than 25°C, the estimated temperature values ​​corresponding to the heating treatment of the vehicle by the first heating module, the second heating module, and the first heating module and the second heating module are analyzed and processed respectively to obtain multiple estimated temperature values, which correspond to the first estimated temperature value, the second estimated temperature value, and the third estimated temperature value, respectively. Among them, the first estimated temperature value is equal to 25°C, the second estimated temperature value is greater than 25°C, and the third estimated temperature value is greater than 25°C. At this time, the mode of using only the first heating module to heat the power battery is determined as the target heating mode, and the vehicle is controlled to heat the power battery with the first heating module.

[0135] The battery thermal management control method provided in this embodiment obtains the target charging pile information of the vehicle, the operating parameters of the vehicle, and the battery loss parameters of the power battery; determines the first power loss generated when the current vehicle reaches the target charging pile based on the operating parameters and the battery loss parameters; determines the temperature estimate and charging temperature threshold of the power battery when the vehicle reaches the target charging pile based on the operating parameters and the maximum charging power of the target charging pile; determines the target heating mode of the current vehicle based on the first power loss, the temperature estimate, and the charging temperature threshold, and controls the current vehicle to heat the power according to the target heating mode. This method can more accurately determine whether the power battery is heated in a low-temperature environment, reduces the danger of high-power charging of the power battery in a low-temperature environment, improves the power of the vehicle, and not only improves the working efficiency of the power battery during charging and discharging, but also improves the user's car experience in winter.

[0136] FIG2 is a second flow chart of the control method for battery thermal management provided by an embodiment of the present application. As shown in FIG2 , this embodiment provides a detailed description of the control method for battery thermal management based on the embodiment of FIG1 . The control method for battery thermal management shown in this embodiment includes:

[0137] S201: Obtain target charging pile information of the vehicle, operating parameters of the vehicle, and battery loss parameters of the power battery.

[0138] S202: Determine a first power consumption of the vehicle when it reaches a target charging pile based on the operating parameter and the battery loss parameter.

[0139] Steps S201-S202 are similar to the above steps S101-S102 and will not be repeated here.

[0140] S203: Determine a preset time for the vehicle to reach the target charging pile based on the distance information.

[0141] The preset duration is used to indicate the length of time required for the vehicle to travel from the current location to the target charging station.

[0142] It is understandable that the speed of the vehicle during driving will affect the speed at which the power battery consumes power. Therefore, in the process of obtaining the operating parameters of the power battery, the current driving speed of the vehicle can also be obtained.

[0143] Based on the distance information between the current vehicle and the target charging pile and the current vehicle's driving speed, the two are calculated and processed to determine the length of time it takes for the vehicle to reach the target charging pile, that is, to obtain the preset time it takes for the vehicle to reach the target charging pile.

[0144] For example, the distance between the current vehicle and the target charging pile is 40 km, and the current vehicle's speed is 50 km / h. After calculation, it can be obtained that the preset time for the current vehicle to reach the target charging pile is 0.8 h.

[0145] S204: Determine the amount of heat generated by the battery when the vehicle reaches the target charging station based on the preset time and heating power.

[0146] Among them, the heat generation power is used to indicate the power of the power battery itself that generates heat when the power battery continuously discharges to provide power to the vehicle. The heat generated by the battery is used to indicate the heat value generated by the heat generation power when the power battery is discharged.

[0147] Based on the preset time for the current vehicle to reach the target charging station and the heat power generated by the vehicle during the driving process to reach the target charging station, the two are calculated and processed to determine the heat generated by the battery when the vehicle reaches the target charging station.

[0148] For example, if the current power battery's heating power is 1 kW and the preset time for the current vehicle to reach the target charging pile is 0.8 h, then the heat generated by the battery when the vehicle reaches the target charging pile is 0.8 kWh.

[0149] S205: Determine an estimated temperature of the power battery when the vehicle arrives at a target charging station based on the current operating temperature and the heat generated by the battery.

[0150] Based on the current operating temperature and the heat generated by the battery, the heat generated by the battery is calculated and processed to obtain the temperature change value when the vehicle reaches the target charging pile. The sum of the temperature change value and the current temperature is used as the estimated temperature value of the current power battery.

[0151] For example, if the current operating temperature is 5°C, the battery generates 0.8 kWh of heat when the vehicle reaches the target charging station. After calculation, the temperature change value corresponding to the 0.8 kWh of heat generated by the battery is ΔT°C. (ΔT+5)°C=T1°C is used as the estimated temperature when the vehicle reaches the target charging station, that is, the obtained estimated temperature is T1°C.

[0152] S206: Determine a charging temperature threshold of the power battery according to the maximum charging power.

[0153] The charging temperature threshold is used to indicate the operating temperature at which the power battery of the current vehicle can reach the maximum charging power during the charging process.

[0154] Based on the target charging pile in the target charging station currently selected by the user, the maximum charging power provided by the target charging pile to the user can be determined. Based on the maximum charging power, the current charging temperature threshold of the power battery is determined, so that the charging efficiency of the power battery is improved during the charging process of the vehicle, reducing the time the user spends charging the vehicle.

[0155] For example, the maximum charging power of the currently determined target charging pile is 120 kW, and the charging temperature threshold of the power battery of the current vehicle may be 25°C.

[0156] S207: Determine the current actual power of the vehicle according to the battery loss parameter and the current standard power.

[0157] According to the battery loss parameters of the power battery currently obtained, they are analyzed and processed, and the current standard power is calculated and processed to obtain the relationship between the current actual power and the current standard power. Based on this correlation, the current standard power is calculated and processed to obtain the current actual power of the vehicle.

[0158] For example, if the current vehicle's battery loss parameter is 5 years and the power battery's energy attenuation rate is 20%, then the actual total power corresponding to the current vehicle's standard total power of 100% should be 80%; if the current standard power is 15%, 0.8×15%=12%, then the actual power of the current power battery is 12%.

[0159] S208: Taking the difference between the current actual power and the first power loss as the estimated remaining power of the vehicle.

[0160] Among them, the estimated remaining power is used to indicate the actual remaining power of the current vehicle after arriving at the target charging station.

[0161] The difference between the current actual power and the first power loss is used as the estimated remaining power of the current vehicle, that is, the actual energy remaining in the power battery after the vehicle reaches the target charging station.

[0162] For example, if the current actual power level is 12%, 12% - 7.5% = 4.5%, then the estimated remaining power level is 4.5%.

[0163] S209: Determine whether the estimated remaining power is less than a remaining power threshold of the vehicle.

[0164] The remaining power threshold is used to indicate the proportion of the remaining mileage power in the actual total power, for example, it may be 4%.

[0165] The purpose of this step of determining whether the estimated remaining power is less than the vehicle's remaining power threshold is to ensure that while the vehicle is heating the power battery, there is still enough power left to ensure that the vehicle can travel a fixed distance when it reaches the target charging station.

[0166] It can be understood that when determining the current vehicle's remaining power threshold, since the total amount of energy stored in the power battery changes continuously as the battery's service life decays, the remaining power threshold will also change with the change in battery service life. Therefore, it is necessary to determine the corresponding remaining power threshold based on the actual total amount of energy that the current power battery can store; through the ratio of the cruising range power to the actual total power, the actual threshold of the current vehicle's remaining power can be determined more accurately.

[0167] Power batteries will reduce charging power during both low and high temperature conditions, significantly reducing charging speed and vehicle performance. Therefore, by adjusting the power battery temperature to an appropriate range, vehicle performance can be improved, thereby enhancing the user experience. However, when the battery thermal management function is enabled, it consumes the vehicle's stored energy and accelerates the energy consumption of the power battery. To ensure that the vehicle can travel at least a fixed distance upon arrival at the target charging station (to prevent unexpected situations where the vehicle cannot be moved), it is necessary to reserve enough power for the current vehicle to travel a fixed distance.

[0168] If the estimated remaining power is less than the vehicle's remaining power threshold, it means that the remaining power of the vehicle after arriving at the target charging station is not enough to support the vehicle to continue driving a fixed distance. At this time, the battery thermal management function cannot be turned on and the power battery cannot be heated.

[0169] If the estimated remaining power is not less than the vehicle's remaining power threshold, it means that the remaining power of the vehicle after arriving at the target charging station can support the vehicle to continue traveling a fixed distance. At this time, it is necessary to further determine whether the power battery should be heated based on the heat generation power of the power battery and the charging temperature threshold.

[0170] For example, if the estimated remaining power is 2.5%, and 2.5% is less than 4%, the remaining power of the vehicle after arriving at the target charging pile cannot support the vehicle to continue traveling a fixed distance. At this time, the battery thermal management function cannot be turned on, and the power battery cannot be heated. If the estimated remaining power is 4.5%, and 4.5% is greater than 4%, it means that the remaining power of the vehicle after arriving at the target charging pile can support the vehicle to continue traveling a fixed distance. At this time, it is necessary to further determine whether the power battery should be heated based on the heat generation power of the power battery and the charging temperature threshold to ensure the minimum energy consumption of the vehicle.

[0171] S210: If the estimated remaining power is not less than the remaining power threshold of the vehicle, determine whether the estimated temperature is less than the charging temperature threshold.

[0172] S211: When the estimated temperature value is less than the charging temperature threshold, send a first operation request to the vehicle and control the vehicle to start a battery thermal management function.

[0173] The first operation request is used to instruct to increase the temperature of the power battery.

[0174] The purpose of judging whether the estimated temperature value is less than the charging temperature threshold in this step is to determine whether it is necessary to turn on the heating module to heat the power battery.

[0175] It can be understood that the current operating environment of the power battery is a low-temperature environment. If the battery thermal management function of the power battery is not turned on, the operating temperature of the power battery will only exist when the temperature estimate is equal to or less than the charging temperature threshold. Since the judgment condition for heating the power battery is that the temperature estimate is less than the charging temperature threshold, and the purpose of heating the power battery is to ensure that the temperature estimate is consistent with the charging temperature threshold, therefore, when the power battery thermal management function is not turned on, there is no situation where the temperature estimate is greater than the charging temperature threshold.

[0176] When the estimated remaining power is not less than the remaining power threshold of the vehicle, whether to perform heating treatment on the power battery can be determined based on the relationship between the temperature estimation value and the charging temperature threshold.

[0177] If the estimated temperature is less than the charging temperature threshold, it means that when the vehicle arrives at the target charging pile, the operating temperature of the power battery has not reached the most suitable temperature, and the current charging power of the power battery cannot be guaranteed to be consistent with the maximum charging power of the target charging pile, which may easily cause safety hazards during the vehicle charging process. At this time, a first operation request is sent to the vehicle. In order to meet the request to increase the operating temperature of the power battery, the vehicle is controlled to turn on the battery thermal management function, thereby increasing the operating temperature of the power battery.

[0178] If the estimated temperature value is not less than the charging temperature threshold, that is, the estimated temperature value is equal to the charging temperature threshold, it means that when the vehicle reaches the target charging pile, the charging temperature threshold of the power battery can be reached only by using the heat generated by the heating power. At this time, there is no need to turn on the vehicle's battery thermal management function, and the vehicle can continue to drive while maintaining the current operating parameters.

[0179] For example, the temperature estimate is T1℃, and the charging temperature threshold is 25℃. If T1℃<25℃, it means that when the vehicle arrives at the target charging pile, there is still a temperature gap between T1℃ and 25℃, and the operating temperature of the power battery cannot reach the most suitable temperature. It also cannot ensure that the current charging power of the power battery is consistent with the maximum charging power of the target charging pile, which may easily cause safety hazards during the vehicle charging process. At this time, the first operation request of "turning on the battery thermal management function" is sent to the vehicle, and the vehicle is controlled to turn on the battery thermal management function, thereby increasing the operating temperature of the power battery; if T1℃=25℃, it means that when the vehicle reaches the target charging pile, the heat generated by the heat pump heating power can meet the increase in the current power battery operating temperature, and the vehicle's battery thermal management function does not need to be turned on at this time.

[0180] S212: Obtain a target heating power corresponding to the battery thermal management function.

[0181] The target heating power is used to instruct the heating module currently selected by the vehicle to heat the power battery so that the estimated temperature of the power battery reaches the charging temperature threshold.

[0182] After the battery thermal management function is turned on, the function can analyze and process the temperature difference between the current temperature estimate and the charging temperature threshold and the preset time for the vehicle to reach the target charging pile, and determine the heating power that makes the temperature estimate when the vehicle arrives at the target charging pile consistent with the charging temperature threshold, that is, the heat value generated by running at this heating power for a preset time can compensate for the currently determined temperature difference, and the heating power is determined as the target heating power.

[0183] Optionally, obtaining a target heating power corresponding to the battery thermal management function includes:

[0184] Obtain the heating module of the power battery, the heating module includes: a first heating module, a second heating module and a third heating module; determine the first heating power corresponding to the first heating module according to the first heating module; determine the second heating power corresponding to the second heating module according to the second heating module; determine the third heating power corresponding to the third heating module according to the third heating module; determine the target heating power corresponding to the battery thermal management function according to the first heating power, the second heating power, the third heating power and the preset duration.

[0185] Among them, the first heating power is greater than the second heating power, and the second heating power is greater than the third heating power; among them, the first heating power can be, for example, a heat pump heating power, the second heating power can be, for example, a PTC heating power, and the third heating power can be, for example, a motor heating power.

[0186] It is understandable that the heating power used by the heating module is variable, but the variable range of the heating power corresponding to different heating modules is different; according to the actual operating conditions of the vehicle, different heating modules and corresponding heating powers are selected to achieve the purpose of heating the power battery, and the heating target is to make the temperature estimate consistent with the charging temperature threshold.

[0187] A vehicle is currently equipped with a first heating module, a second heating module, and a third heating module, each of which has a corresponding heating power. Due to the varying heating powers of the different heating modules, when heating the power battery, a heating module with a greater heating power is preferentially selected for heating, i.e., the first heating module may be selected for heating first. If the currently selected heating module cannot meet the heating requirements of the power battery, the first and second heating modules are simultaneously activated for heating, or the first, second, and third heating modules are simultaneously activated for heating. The corresponding heating modes may include: heating with the first heating module, heating with the first and second heating modules together, and heating with the first, second, and third heating modules together. Based on the temperature difference between the estimated temperature and the charging temperature threshold, the heat values ​​that can be generated by the vehicle when heating the power battery using different heating modes are determined from the multiple heating modules. The multiple heat values ​​obtained are analyzed and processed to determine the heating module to be used by the vehicle when the estimated temperature reaches the charging temperature threshold upon arrival at the target charging station. The heating power corresponding to this heating module in this case is the target heating power.

[0188] Optionally, determining a target heating power corresponding to the battery thermal management function according to the first heating power, the second heating power, and the preset duration includes:

[0189] Based on the temperature estimate and the charging temperature threshold, the temperature difference required by the power battery is determined; based on the temperature difference and the preset time, the target heat required by the power battery is determined; based on the first heating power and the preset time, the first heat generated by the first heating module within the preset time is determined, and it is judged whether the first heat reaches the target heat; if the first heat reaches the target heat, the first heat is determined to be the target heat; if the first heat does not reach the target heat, the second heat generated by the first heating module and the second heating module within the preset time is determined based on the first heating power, the second heating power and the preset time, and it is judged whether the second heat reaches the target heat; if the second heat reaches the target heat, the second heat is determined to be the target heat; if the second heat does not reach the target heat, the third heat generated by the first heating module, the second heating module and the third heating module within the preset time is determined based on the first heating power, the second heating power, the third heating power and the preset time, and the third heat is determined to be the target heat; based on the target heat, the target heating power corresponding to the battery thermal management function is determined.

[0190] It can be understood that the heating modules currently configured in the vehicle include: a first heating module, a second heating module and a third heating module, and the heating powers corresponding to different heating modules are, from large to small, the first heating power, the second heating power and the third heating power. When it is determined that the heat value generated by the first heating module for heating the power battery cannot reach the target heat, it is necessary to control the vehicle to use multiple heating modules at the same time to heat the power battery.

[0191] This embodiment does not impose any special restrictions on the heating modules configured inside the vehicle. This embodiment is merely described by taking the example that the heating modules include a first heating module, a second heating module, and a third heating module.

[0192] Based on the estimated temperature value and the charging temperature threshold, the two are calculated and processed to obtain the temperature difference required by the power battery when the vehicle arrives at the target charging pile; based on the temperature difference and the preset driving time of the vehicle, they are calculated and processed to obtain the corresponding heat value, and this heat value is determined as the target heat required by the power battery.

[0193] If the first heat reaches the target heat, it indicates that the first heating module can generate a heat value corresponding to the temperature difference that increases the temperature of the power battery within the preset time. At this time, the first heat generated by the first heating module operating at the first heating power within the preset time is determined to be the target heat.

[0194] If the first heat does not reach the target heat, it indicates that the first heating module cannot generate a heat value corresponding to the temperature difference that increases the temperature of the power battery within the preset time. At this time, based on the first heating power, the second heating power and the preset time, the second heat generated when the first heating module and the second heating module jointly perform heating treatment within the preset time is determined; and it is judged whether the second heat reaches the target heat.

[0195] If the second heat reaches the target heat, it indicates that the first heating module and the second heating module can generate a heat value corresponding to the temperature difference that increases the temperature of the power battery within the preset time. At this time, the second heat generated by the first heating module and the second heating module operating together with the first heating power and the second heating power within the preset time is determined to be the target heat.

[0196] If the second heat amount does not reach the target heat amount, it indicates that the first heating module and the second heating module cannot generate a heat value corresponding to the temperature difference that increases the temperature of the power battery within the preset time period. At this time, it is necessary to determine, based on the first heating power, the second heating power, the third heating power and the preset time period, whether the heat value generated by the vehicle heating the power battery simultaneously with the first heating module, the second heating module and the third heating module within the preset time period can reach the target heat amount, and determine this heat value as the third heat generated. At this time, the third heat amount can be used as the target heat amount.

[0197] According to the currently determined target heat, a heating module corresponding to the target heat can be obtained, and the target heating power corresponding to the battery thermal management function can be determined accordingly.

[0198] For example, the temperature estimate may be T1°C, and the charging temperature threshold is 25°C. The two are calculated and processed, 25°C-T1°C=ΔT°C, and the temperature difference between the two can be obtained as ΔT°C. In addition, the operating temperature of the power battery must be increased by ΔT°C within 0.8h. After analysis and processing, the heat value corresponding to the increase of ΔT°C can be obtained as an increase of (ΔQ)J. Then (ΔQ)J is used as the target heat, and the heat values ​​corresponding to different heating modules configured inside the vehicle are calculated. When the heat pump heating module is used for heating treatment, the first heat generated by the corresponding heat pump heating power is (ΔQ1)J. If (ΔQ)J=(ΔQ1)J, it indicates that the heat value generated by the heat pump heating module for heating treatment within 0.8h can meet the heat value corresponding to the temperature difference of the power battery temperature increase. At this time, (ΔQ1)J is used as the target heat. If (ΔQ)J>(ΔQ1)J, then It indicates that the heat value generated by the heat pump heating module for heating treatment cannot meet the heat value corresponding to the temperature difference of the power battery's temperature rise. At this time, it is necessary to determine the second heat generated by the heat pump heating module and the PTC heating module within the preset time of 0.8h based on the heat pump heating power, the PTC heating power and the preset time of 0.8h, and the second heat is (ΔQ2)J; if (ΔQ)J=(ΔQ2)J, it indicates that the heat value generated by the heat pump heating module and the PTC heating module for heating treatment can meet the heat value corresponding to the temperature difference when the power battery's temperature rises. At this time, (ΔQ2)J is used as the target heat; if (ΔQ)J>(ΔQ2)J, it indicates that the heat value generated by the heat pump heating module and the PTC heating module for heating treatment cannot meet the heat value corresponding to the temperature difference when the power battery's temperature rises. At this time, it is necessary to turn on the heat pump heating module, The PTC heating module and the motor heating module heat the power battery. The target heat value (ΔQ3) J generated by the heat pump, PTC, and motor heating modules is used as the target heat value. If the current target heat value is (ΔQ1) J, the corresponding heating module is the heat pump heating module, and the corresponding heating power of the heat pump heating module is used as the target heating power.

[0199] S213: Determine a target heating mode for operating the battery thermal management function according to the target heating power.

[0200] S214: Controlling the vehicle to heat the power battery according to the target heating mode.

[0201] It can be understood that there is a correlation between the target heating power and the target heating mode; when the vehicle heats the power battery with different heating powers, the operating temperature of the power battery will also change differently. Since there are multiple heating modules inside the vehicle, and each heating module can adjust its own heating power, the range of different heating powers corresponding to each heating module is different; in order to meet the different heating needs of the vehicle during driving, different heating modes are set in the battery thermal management function. Different heating modes correspond to the use of different heating modules, and also correspond to different heating powers. According to different vehicle usage conditions, different heating modules and heating powers can be selected to heat the power battery, and then different heating modes can be determined according to different heating powers and heating modules.

[0202] According to the currently determined target heating power, it is matched with the heating mode set in the battery thermal management function, and the matching heating mode is used as the target heating mode for heating the power battery at that time, and the vehicle is controlled to heat the power battery according to the target heating mode.

[0203] For example, according to the currently determined target heating power being the heating power corresponding to the first heating module, the corresponding heating mode set in the battery thermal management function can be obtained as: "Turn on the first heating module", then the vehicle is controlled to turn on the first heating module to heat the power battery.

[0204] Optionally, after controlling the vehicle to heat the power battery according to the target heating mode, the method further includes:

[0205] Re-obtain the vehicle's estimated remaining power and determine whether the estimated remaining power is less than the vehicle's remaining power threshold; when the estimated remaining power is less than the remaining power threshold, send a second operation request to the vehicle and control the vehicle to turn off the battery thermal management function.

[0206] The second operation request is used to instruct to stop heating the power battery.

[0207] The purpose of this step of determining whether the estimated remaining power is less than the vehicle's remaining power threshold is to ensure that while the vehicle is heating the power battery, there is still enough power left to ensure that the vehicle can travel a fixed distance when it reaches the target charging station.

[0208] If the estimated remaining power is less than the vehicle's remaining power threshold, it means that the remaining power of the vehicle after arriving at the target charging station is not enough to support the vehicle to continue traveling a fixed distance. At this time, a second operation request is sent to the vehicle, and the vehicle is controlled to turn off the battery thermal management function and stop heating the power battery.

[0209] If the estimated remaining power is not less than the vehicle's remaining power threshold, it means that the remaining power of the vehicle after reaching the target charging station can support the vehicle to continue traveling a fixed distance. At this time, the current state of heating the power battery can be kept unchanged.

[0210] For example, if the estimated remaining power is 2.5%, and 2.5% is less than 4%, the remaining power of the vehicle after arriving at the target charging pile cannot support the vehicle to continue traveling a fixed distance. At this time, a request to "turn off the battery thermal management function" is sent to the vehicle, and the vehicle is controlled to turn off the battery thermal management function and stop heating the power battery; if the estimated remaining power is 4.5%, and 4.5% is greater than 4%, it indicates that the remaining power of the vehicle after arriving at the target charging pile can support the vehicle to continue traveling a fixed distance. At this time, the current heating power is kept unchanged and the power battery continues to be heated.

[0211] The battery thermal management control method provided in this embodiment obtains the target charging pile information of the vehicle, the operating parameters of the vehicle and the battery loss parameters of the power battery; determines the first power loss generated when the current vehicle reaches the target charging pile based on the operating parameters and the battery loss parameters; determines the preset time when the vehicle reaches the target charging pile and the amount of heat generated by the battery of the vehicle within the preset time based on the distance information between the vehicle and the target charging pile and the heating power of the power battery; determines the estimated temperature of the power battery when the vehicle arrives at the target charging pile based on the heat generated by the battery and the current operating temperature; determines the charging temperature threshold of the power battery based on the maximum charging power of the target charging pile; determines the current actual power of the vehicle based on the battery loss parameters and the current standard power and taking the difference between the current actual power and the first power loss as the vehicle's estimated remaining power; determining whether the estimated remaining power is less than the current vehicle's remaining power threshold; if the estimated remaining power is not less than the vehicle's remaining power threshold, determining whether the temperature estimate is less than the charging temperature threshold; when the temperature estimate is less than the charging temperature threshold, sending a first operation request to the vehicle, and controlling the vehicle to activate the battery thermal management function; obtaining different heating powers corresponding to different heating modules inside the vehicle, and determining the target heating power corresponding to the battery thermal management function based on the different heat values ​​corresponding to the different heating powers, and determining the target heating mode corresponding to the target heating power for the battery thermal management function, and controlling the current vehicle to heat the power according to the target heating mode. This method can more accurately determine whether the power battery is heated in a low-temperature environment, reduce the danger of high-power charging of the power battery in a low-temperature environment, improve the vehicle's power, optimize the vehicle's thermal management function in a low-temperature environment, and not only improve the working efficiency of the power battery during charging and discharging, but also improve the user's winter driving experience.

[0212] FIG3 is a schematic diagram of the structure of a battery thermal management control device provided by the present application. As shown in FIG3 , the present application provides a battery thermal management control device, and the battery thermal management control device 300 includes:

[0213] The acquisition module 301 is used to obtain the target charging pile information of the vehicle, the operating parameters of the vehicle, and the battery loss parameters of the power battery. The target charging pile information includes: the distance information between the vehicle and the target charging station and the maximum charging power of the target charging station. The operating parameters are used to indicate the data information that can be detected during the operation of the vehicle.

[0214] The determination module 302 is configured to determine a first power consumption when the vehicle reaches the target charging pile according to the operating parameter and the battery loss parameter.

[0215] The determining module 302 is further configured to determine, based on the operating parameters and the maximum charging power, an estimated temperature of the power battery and a charging temperature threshold of the power battery when the vehicle arrives at a target charging pile.

[0216] The determining module 302 is further configured to determine a target heating mode for the vehicle according to the first power loss, the estimated temperature value, and the charging temperature threshold.

[0217] The control module 303 is configured to control the vehicle to heat the power battery according to the target heating mode.

[0218] Optionally, the determination module 302 is further configured to determine a preset time duration for the vehicle to reach the target charging pile based on the distance information.

[0219] The determining module 302 is further configured to determine the amount of heat generated by the battery when the vehicle reaches the target charging pile based on the preset time and the heating power.

[0220] The determining module 302 is further configured to determine an estimated temperature of the power battery when the vehicle arrives at a target charging station based on the current operating temperature and the heat generated by the battery.

[0221] The determining module 302 is further configured to determine a charging temperature threshold of the power battery according to the maximum charging power.

[0222] Optionally, the determination module 302 is further configured to determine the current actual power of the vehicle based on the battery loss parameter and the current standard power.

[0223] The determining module 302 is further configured to use the difference between the current actual power and the first power loss as the estimated remaining power of the vehicle.

[0224] Optionally, the battery thermal management control device further includes: a judgment module 304.

[0225] The determination module 304 is configured to determine whether the estimated remaining power is less than a remaining power threshold of the vehicle.

[0226] If the estimated remaining power is not less than the remaining power threshold of the vehicle, the determination module 304 is further configured to determine whether the estimated temperature is less than the charging temperature threshold.

[0227] The battery thermal management control device further includes: a sending module 305 .

[0228] The sending module 305 is configured to send a first operation request to the vehicle when the estimated temperature value is less than the charging temperature threshold, wherein the first operation request is used to instruct to increase the temperature of the power battery.

[0229] The control module 303 is further configured to control the vehicle to enable a battery thermal management function.

[0230] The acquisition module 301 is further configured to acquire a target heating power corresponding to the battery thermal management function.

[0231] The determining module 302 is further configured to determine a target heating mode for the battery thermal management function according to the target heating power.

[0232] Optionally, the acquisition module 301 is further configured to acquire a heating module of the power battery, where the heating module includes: a first heating module, a second heating module, and a third heating module.

[0233] The determining module 302 is further configured to determine a first heating power corresponding to the first heating module according to the first heating module.

[0234] The determining module 302 is further configured to determine a second heating power corresponding to the second heating module according to the second heating module.

[0235] The determining module 302 is further configured to determine a third heating power corresponding to the third heating module according to the third heating module.

[0236] The determining module 302 is further configured to determine a target heating power corresponding to the battery thermal management function according to the first heating power, the second heating power, the third heating power, and the preset duration.

[0237] Optionally, the determining module 302 is further configured to determine a temperature difference required by the power battery according to the temperature estimation value and the charging temperature threshold.

[0238] The determining module 302 is further configured to determine a target heat quantity required by the power battery according to the temperature difference and the preset time.

[0239] The determining module 302 is further configured to determine a first amount of heat generated by the first heating module within the preset time period according to the first heating power and the preset time period.

[0240] The determining module 304 is further configured to determine whether the first heat reaches the target heat.

[0241] If the first heat reaches the target heat, the determining module 302 is further configured to determine that the first heat is the target heat.

[0242] If the first heat does not reach the target heat, the determination module 302 is further used to determine the second heat generated by the first heating module and the second heating module within the preset time period based on the first heating power, the second heating power and the preset time period.

[0243] The determining module 304 is further configured to determine whether the second heat reaches the target heat.

[0244] If the second heat reaches the target heat, the determining module 302 is further configured to determine that the second heat is the target heat.

[0245] If the second heat does not reach the target heat, the determination module 302 is further used to determine the third heat generated by the first heating module, the second heating module and the third heating module within the preset time period based on the first heating power, the second heating power, the third heating power and the preset time period, and determine that the third heat is the target heat.

[0246] The determining module 302 is further configured to determine a target heating power corresponding to the battery thermal management function according to the target heat amount.

[0247] Optionally, the acquisition module 301 is further configured to reacquire the estimated remaining power of the vehicle.

[0248] The determination module 304 is further configured to determine whether the estimated remaining power is less than a remaining power threshold of the vehicle.

[0249] The sending module 305 is further configured to send a second operation request to the vehicle when the estimated remaining power is less than the remaining power threshold, wherein the second operation request is configured to instruct to stop heating the power battery.

[0250] The control module 303 is further configured to control the vehicle to disable a battery thermal management function.

[0251] FIG4 is a schematic diagram of the structure of a battery thermal management control device provided by the present application. As shown in FIG4 , the present application provides a battery thermal management control device, wherein the battery thermal management control device 400 includes: a receiver 401 , a transmitter 402 , a processor 403 , and a memory 404 .

[0252] Receiver 401, for receiving instructions and data;

[0253] Transmitter 402, used to send instructions and data;

[0254] Memory 404, for storing computer-executable instructions;

[0255] The processor 403 is configured to execute computer-executable instructions stored in the memory 404 to implement the various steps of the battery thermal management control method in the above embodiment. For details, please refer to the relevant description in the above embodiment of the battery thermal management control method.

[0256] Optionally, the memory 404 may be independent or integrated with the processor 403 .

[0257] When the memory 404 is independently provided, the electronic device further includes a bus for connecting the memory 404 and the processor 403 .

[0258] The present application also provides a computer-readable storage medium, which stores computer-executable instructions. When a processor executes the computer-executable instructions, the battery thermal management control method performed by the battery thermal management control device as described above is implemented.

[0259] It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As is well known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable, and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those skilled in the art that communication media generally embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0260] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0261] It should be understood that the present application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A control method for battery thermal management, characterized in that: The method comprises: Obtaining target charging pile information of the vehicle, operating parameters of the vehicle, and battery loss parameters of the power battery, wherein the target charging pile information includes: distance information between the vehicle and the target charging station and the maximum charging power of the target charging station, and the operating parameters are used to indicate data information that can be detected during the operation of the vehicle; Determining a first power consumption of the vehicle when it reaches a target charging pile according to the operating parameter and the battery loss parameter; Determining, according to the operating parameters and the maximum charging power, an estimated temperature of the power battery and a charging temperature threshold of the power battery when the vehicle arrives at a target charging pile; A target heating mode of the vehicle is determined according to the first power loss, the temperature estimation value and the charging temperature threshold, and the vehicle is controlled to heat the power battery according to the target heating mode.

2. The method according to claim 1, characterized in that The operating parameters include: the heat generation power and the current operating temperature of the power battery. The determining, based on the operating parameters and the maximum charging power, of the estimated temperature of the power battery and the charging temperature threshold of the power battery when the vehicle arrives at the target charging pile includes: Determine, based on the distance information, a preset time for the vehicle to reach the target charging pile; Determining, based on the preset time and the heating power, the amount of heat generated by the battery when the vehicle reaches the target charging pile; Determining an estimated temperature of the power battery when the vehicle arrives at a target charging pile according to the current operating temperature and the heat generated by the battery; A charging temperature threshold of the power battery is determined according to the maximum charging power.

3. The method according to claim 2, characterized in that The operating parameter includes: a current standard power of the vehicle. Before determining a target heating mode of the vehicle according to the first power loss, the temperature estimate, and the charging temperature threshold, the method further includes: Determining a current actual power level of the vehicle according to the battery loss parameter and the current standard power level; The difference between the current actual power and the first power loss is used as the estimated remaining power of the vehicle.

4. The method according to claim 3, characterized in that The determining, according to the first power loss, the temperature estimation value and the charging temperature threshold, a target heating mode of the vehicle includes: Determining whether the estimated remaining power is less than a remaining power threshold of the vehicle; If the estimated remaining power is not less than the remaining power threshold of the vehicle, determining whether the temperature estimate is less than the charging temperature threshold; When the estimated temperature is less than the charging temperature threshold, sending a first operation request to the vehicle and controlling the vehicle to start a battery thermal management function, wherein the first operation request is used to instruct to increase the temperature of the power battery; Obtaining a target heating power corresponding to the battery thermal management function; A target heating mode for operating the battery thermal management function is determined according to the target heating power.

5. The method according to claim 4, characterized in that The obtaining of the target heating power corresponding to the battery thermal management function includes: Obtaining a heating module of the power battery, wherein the heating module comprises: a first heating module, a second heating module and a third heating module; Determining a first heating power corresponding to the first heating module according to the first heating module; Determining a second heating power corresponding to the second heating module according to the second heating module; According to the third heating module, determining a third heating power corresponding to the third heating module; A target heating power corresponding to the battery thermal management function is determined according to the first heating power, the second heating power, the third heating power and the preset duration.

6. The method according to claim 5, characterized in that The determining, according to the first heating power, the second heating power, the third heating power and the preset duration, a target heating power corresponding to the battery thermal management function includes: Determining a temperature difference required for the power battery according to the temperature estimate and the charging temperature threshold; Determining a target amount of heat required by the power battery according to the temperature difference and the preset time; Determine, according to the first heating power and the preset time, a first amount of heat generated by the first heating module within the preset time, and judge whether the first amount of heat reaches the target amount of heat; If the first heat reaches the target heat, determining the first heat as the target heat; If the first heat does not reach the target heat, determining the second heat generated by the first heating module and the second heating module within the preset time period according to the first heating power, the second heating power and the preset time period, and judging whether the second heat reaches the target heat; If the second heat reaches the target heat, determining the second heat as the target heat; If the second heat does not reach the target heat, determining the third heat generated by the first heating module, the second heating module and the third heating module within the preset time period according to the first heating power, the second heating power, the third heating power and the preset time period, and determining the third heat as the target heat; A target heating power corresponding to the battery thermal management function is determined according to the target heat.

7. The method according to claim 5, characterized in that After controlling the vehicle to heat the power battery according to the target heating mode, the method further includes: Re-acquiring the estimated remaining power of the vehicle, and determining whether the estimated remaining power is less than a remaining power threshold of the vehicle; When the estimated remaining power is less than the remaining power threshold, a second operation request is sent to the vehicle, and the vehicle is controlled to turn off a battery thermal management function, wherein the second operation request is used to instruct to stop heating the power battery.

8. A battery thermal management control device, characterized in that: The device comprises: An acquisition module, used to acquire the target charging pile information of the vehicle, the operating parameters of the vehicle and the battery loss parameters of the power battery, wherein the target charging pile information includes: the distance information between the vehicle and the target charging station and the maximum charging power of the target charging station, and the operating parameters are used to indicate the data information that can be detected during the operation of the vehicle; A determination module, configured to determine a first power consumption of the vehicle when it reaches the target charging pile according to the operating parameter and the battery loss parameter; The determination module is further configured to determine, according to the operating parameters and the maximum charging power, an estimated temperature of the power battery and a charging temperature threshold of the power battery when the vehicle arrives at a target charging pile; The determination module is further configured to determine a target heating mode of the vehicle according to the first power loss, the temperature estimate and the charging temperature threshold; A control module is used to control the vehicle to heat the power battery according to the target heating mode.

9. A battery thermal management control device, characterized in that: include: Memory; processor; Wherein, the memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the battery thermal management control method according to any one of claims 1 to 7.

10. A computer storage medium, characterized in that: The computer storage medium stores computer executable instructions, and when the computer executable instructions are executed by a processor, they are used to implement the battery thermal management control method according to any one of claims 1 to 7.

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