Battery thermal management strategy determination method, device, apparatus, medium, and vehicle

Abstract

The application discloses a battery thermal management strategy determination method, device, equipment, medium and vehicle, determines multiple working conditions of a battery and a battery body heat generation power corresponding to each working condition, determines the temperature rise corresponding to each working condition in the order of the closeness of the working condition to a preset charging cutoff working condition from large to small, determines a first working condition containing a set temperature and a sum value of the corresponding temperature rise greater than a maximum temperature in the multiple working conditions, and determines a cooling power opening temperature threshold value corresponding to each set SOC according to the set temperature contained in the first working condition. According to the embodiment, the cooling power opening temperature threshold value corresponding to each set SOC can be determined, and the transient thermal management of the battery can be realized based on the cooling power opening temperature threshold value corresponding to each set SOC. Compared with the traditional thermal management based on the initial working condition to determine the thermal management strategy, the transient thermal management is more accurate, and the battery charging rate can be effectively improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of battery thermal management, and particularly relates to a battery thermal management strategy determination method, device, equipment, medium and vehicle. BACKGROUND

[0002] As a new energy carrier, a battery is gradually widely used. For example, in a new energy vehicle, the battery is usually used as one of the core components for providing power. The charging performance of the battery is directly related to the user experience, and fast charging of the battery is one of the important means for solving the range anxiety of the new energy vehicle. Since the charging rate of the battery is different under different temperature conditions, in order to improve the charging rate of the battery, the battery is usually subjected to thermal management during the charging process.

[0003] In the existing technical solution, the initial working condition of the battery is usually classified, and then a corresponding thermal management strategy is given based on the allowable charging capacity of the battery cell under the initial working condition. However, in fact, the fast charging of the battery is a process of rapid change of working condition, and therefore the demand of the fastest charging path, i.e. the charging path with the fastest charging speed, for thermal management is also real-time changing. Therefore, the existing technical solution determines the thermal management strategy based on the initial working condition, which leads to inaccurate thermal management strategy and low charging rate. SUMMARY

[0004] The embodiments of the application provide a battery thermal management strategy determination method, device, equipment, medium and vehicle, which can improve the problem of inaccurate battery thermal management strategy and help to improve the charging efficiency of the battery.

[0005] In a first aspect, the embodiments of the application provide a battery thermal management strategy determination method, comprising:

[0006] determining a plurality of working conditions of the battery and an allowable charging rate corresponding to each working condition, each working condition comprising a set state of charge (SOC) and a set temperature, and different working conditions comprising different set SOCs and / or set temperatures, and the set temperature comprising a temperature of the battery and / or a temperature of an environment in which the battery is located;

[0007] for each working condition, determining a battery body heat generation power of the battery when charging under the working condition according to the allowable charging rate under the working condition;

[0008] determining, in order of proximity from large to small, a temperature rise corresponding to each working condition in the plurality of working conditions according to a preset charging cutoff working condition, wherein the charging cutoff working condition comprises a charging cutoff SOC and a maximum temperature, the temperature rise corresponding to the working condition is used to indicate a change in the temperature of the battery from the working condition to the charging cutoff SOC, and the temperature rise is determined based on the battery body heat generation power corresponding to the working condition and a required thermal management power in the process of charging from the working condition to the charging cutoff SOC;

[0009] determine a first working condition in the plurality of working conditions, the first working condition referring to a working condition whose sum of a set temperature and a corresponding temperature rise is greater than the maximum temperature;

[0010] determine, according to the set temperature included in the first working condition, a cooling power start temperature threshold corresponding to each set SOC in the plurality of working conditions, respectively.

[0011] In a second aspect, an embodiment of the present application provides a battery thermal management strategy determination apparatus, including:

[0012] a determination module, configured to determine a plurality of working conditions of a battery and a corresponding allowable charging rate of each working condition, each working condition including a set state of charge (SOC) and a set temperature, different working conditions including different set states of charge and / or set temperatures, and the set temperature including a temperature of the battery and / or a temperature of an environment in which the battery is located;

[0013] a power determination module, configured to determine, for each working condition, a battery body heat generation power of the battery when charging in the working condition according to the allowable charging rate in the working condition;

[0014] a temperature rise determination module, configured to determine, in order of decreasing proximity of working conditions to a preset charging cutoff working condition, a corresponding temperature rise of each working condition in the plurality of working conditions, wherein the charging cutoff working condition includes a charging cutoff SOC and a maximum temperature, the corresponding temperature rise of the working condition is used to indicate a change in battery temperature when charging from the working condition to the charging cutoff SOC, and the temperature rise is determined based on the battery body heat generation power corresponding to the working condition and a required thermal management power during charging from the working condition to the charging cutoff SOC;

[0015] a first working condition determination module, configured to determine a first working condition in the plurality of working conditions, the first working condition referring to a working condition whose sum of a set temperature and a corresponding temperature rise is greater than the maximum temperature;

[0016] a cooling threshold determination module, configured to determine, according to the set temperature included in the first working condition, a cooling power start temperature threshold corresponding to each set SOC in the plurality of working conditions, respectively.

[0017] In a third aspect, an embodiment of the present application provides an electronic device, including a processor and a memory having stored computer program instructions;

[0018] The processor, when executing the computer program instructions, implements steps of the battery thermal management strategy determination method according to the first aspect.

[0019] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium having stored computer program instructions, and the computer program instructions, when executed by a processor, implement steps of the battery thermal management strategy determination method according to the first aspect.

[0020] In a fifth aspect, the embodiments of the present application provide a vehicle comprising the battery thermal management strategy determination device according to the second aspect.

[0021] The battery thermal management strategy determination method, device, equipment, medium and vehicle provided by the embodiments of the present application determine multiple working conditions of the battery and the allowable charging rate corresponding to each working condition, for each working condition, determine the battery body heat generation power of the battery in the working condition according to the allowable charging rate in the working condition, determine the temperature rise corresponding to each working condition in the multiple working conditions in the order from large to small according to the proximity of the working condition to the preset charging cutoff working condition, determine the first working condition in the multiple working conditions, the first working condition refers to the working condition containing the sum of the set temperature and the corresponding temperature rise being greater than the maximum temperature, and determine the cooling power opening temperature threshold corresponding to each set SOC in the multiple working conditions according to the set temperature contained in the first working condition. According to the embodiments, the temperature change of the battery when charging in multiple working conditions is analyzed, and the cooling power opening temperature threshold corresponding to each set SOC is determined. Based on the cooling power opening temperature threshold corresponding to each set SOC, the transient thermal management of the battery can be realized. Compared with the thermal management based on the initial working condition, the transient thermal management has higher precision and is more accurate, and can effectively improve the battery charging rate. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. Those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0023] Figure 1 is a flowchart of the battery thermal management strategy determination method provided by the embodiments of the present application;

[0024] Figure 2 is a schematic diagram of the battery performance parameter table corresponding to multiple working conditions provided by the embodiments of the present application;

[0025] Figure 3 is a schematic diagram of the battery body heat generation power table corresponding to multiple working conditions provided by the embodiments of the present application;

[0026] Figure 4 is a schematic diagram of the heating power table corresponding to multiple working conditions provided by the embodiments of the present application;

[0027] Figure 5 is a schematic diagram of the thermal management power table corresponding to multiple working conditions provided by the embodiments of the present application;

[0028] Figure 6 is a flowchart of a battery thermal management method provided by the embodiments of the present application;

[0029] Figure 7 is a structural schematic diagram of a battery thermal management strategy determination device provided by an embodiment of the present application;

[0030] Figure 8 is a structural schematic diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to more clearly understand the above-mentioned purposes, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0032] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present disclosure, but the present disclosure can also be implemented in other manners different from those described herein; obviously, the embodiments described in the specification are only a part of the embodiments of the present disclosure, and not all the embodiments.

[0033] It should be noted that, in this document, relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the phrase "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0034] Battery fast charging is a process with rapidly changing working conditions, and the demand for thermal management of the fastest charging path is also real-time changing. A more efficient thermal management scheme needs to be realized through a transient thermal management strategy. Since different types of batteries have different optimal working temperature ranges, the fastest charging path is also different. An embodiment of the present application provides a general method for determining a battery transient thermal management strategy. In the battery fast charging process, the thermal management strategy determined based on the battery thermal management strategy determination method provided by the present application is used for thermal management, which can realize the fastest charging process of the power battery under any starting working condition.

[0035] The target of battery transient thermal management is to manage the battery temperature, and the essence is to manage the power. In the embodiment, the battery refers to a battery pack, which usually contains a plurality of single batteries, and there may also be differences between different single batteries in the same battery pack, which makes the thermal management scheme shared by the whole battery pack cannot make each single battery in a unified charging path when charging the battery pack. Therefore, in order to limit the charging path of all single batteries in the optimal charging interval, the embodiment of the application determines the transient thermal management strategy by exploring the range boundary of the optimal charging path. That is, the boundary (i.e. thermal management threshold) of the thermal management strategy determined based on the embodiment of the application is the envelope of the optimal charging path of all single batteries in the battery pack.

[0036] In order to determine the thermal management threshold that makes all single batteries in the battery pack in the optimal charging interval, the embodiment of the application determines the thermal management threshold by adopting the bottom-up principle. At present, thermal management usually includes both heating and cooling methods, so the thermal management threshold can include a cooling power start temperature threshold and / or a heating power start temperature threshold.

[0037] The bottom-up principle adopted by the embodiment of the application mainly includes the following three factors:

[0038] 1. Throughout the charging process, the battery is within the safe working temperature boundary;

[0039] 2. During the charging process, the battery is within the optimal working temperature boundary for the longest time;

[0040] 3. When the battery is within the optimal working boundary for the same length of time, the battery thermal management has the lowest energy consumption.

[0041] Based on the above three factors, the following three basic principles for determining the transient thermal management strategy are given:

[0042] 1. Throughout the charging process, the battery temperature is controlled within the safe boundary;

[0043] 2. During the charging process, the power battery enters its optimal working temperature interval as soon as possible;

[0044] 3. When the battery is already in the optimal working interval, the battery full charge and end temperature does not exceed the allowed maximum temperature as the target working condition of the end of charging, wherein the maximum temperature can be set according to the actual situation, for example, it can be 50℃.

[0045] Based on the above principles, the embodiment of the application provides a battery thermal management strategy determination method, device, equipment, storage medium and vehicle.

[0046] Referring to Figure 1 A flowchart of a battery thermal management strategy determination method provided by the embodiment of the application is shown in Figure 1As shown, the method can include steps S11-S16.

[0047] S11. Determine a plurality of working conditions of the battery and a permissible charging rate corresponding to each working condition, each working condition containing a set state of charge (SOC) and a set temperature, different working conditions containing different set SOC and / or set temperature, and the set temperature including the temperature of the battery and / or the temperature of the environment in which the battery is located.

[0048] The plurality of working conditions of the battery can be set according to actual needs, and can generally be some common working conditions of the battery.

[0049] In some embodiments of the present application, when determining the plurality of working conditions, the commonly used SOC interval and temperature interval of the battery can be determined first (the temperature interval can be the battery temperature interval or the ambient temperature interval of the environment in which the battery is located), then a plurality of SOCs are selected from the SOC interval as the set SOC, a plurality of temperatures are selected from the temperature interval as the set temperature, and then the plurality of set SOCs and the plurality of set temperatures are arranged and combined to obtain the plurality of working conditions.

[0050] The charging rate is a measure of the speed of charging, and refers to the current value required by the battery to charge to its rated capacity in a specified time. The permissible charging rate corresponding to each working condition is the charging rate allowed to be used under the working condition, which can be obtained from the battery parameters.

[0051] As an example, the plurality of working conditions are determined based on the SOC interval of 0%-97% SOC and the commonly used temperature interval of -20℃-50℃, see Figure 2 The schematic diagram of the battery performance parameter table corresponding to the plurality of working conditions provided in this embodiment includes the set SOC, the set temperature, and the corresponding permissible charging rate contained in each working condition, wherein the parameter values in the first row are the set SOC, the parameter values in the second column are the set temperature, and the remaining parameter values other than the set SOC and the set temperature are the permissible charging rate. The area in the dashed box corresponds to the best working interval of the battery performance.

[0052] S12. For each working condition, determine the battery body heat generation power of the battery when charging under the working condition according to the permissible charging rate under the working condition.

[0053] The battery body heat generation power refers to the heat generation power of the battery itself without thermal management, also known as the intrinsic heat generation power.

[0054] Currently, there are mature technologies for determining the battery body heat generation power when charging based on the charging rate, including but not limited to experimental calibration, using power calculation formula, i.e. I 2R-calculation, calculation using entropy-thermal coefficient, and calculation using equivalent circuit models are all possible methods. This embodiment can employ any of these techniques to determine the battery's internal heat output under various operating conditions.

[0055] As an example, let's use power calculation formula I 2 Taking the calculation of the battery's heat generation power under the operating condition as an example, replace I in the formula with the allowable charging rate corresponding to the operating condition, and replace R with the battery's internal resistance. In this way, the battery's heat generation power corresponding to the operating condition can be obtained through calculation.

[0056] See Figure 3 , in order to Figure 2 The diagram shows the battery body heat generation power table corresponding to multiple operating conditions. The table includes the set SOC, set temperature and corresponding battery body heat generation power for each operating condition. The parameter value in the first row is the set SOC, the parameter value in the second column is the set temperature, and the other parameters besides the set SOC and set temperature are the battery body heat generation power.

[0057] S13. According to the order of proximity between the operating condition and the preset charging cutoff condition from large to small, determine the temperature rise corresponding to each of the multiple operating conditions in sequence. The charging cutoff condition includes the charging cutoff SOC and the maximum temperature. The temperature rise corresponding to the operating condition is used to indicate the amount of battery temperature change from charging under the operating condition to charging cutoff SOC. The temperature rise is determined based on the battery body heat generation power corresponding to the operating condition and the thermal management power during the process of charging from the operating condition to charging cutoff SOC.

[0058] The battery charging cutoff condition can be set according to actual conditions.

[0059] To avoid overcharging the battery, the charging cutoff SOC can be close to and less than 100% SOC, for example, it can be 97% SOC.

[0060] To prevent excessively low temperatures from slowing down battery charging and to avoid overheating from damaging the battery, the maximum temperature can be set between 45°C and 55°C. Based on the principle of keeping the battery temperature within safe limits throughout the charging process, the maximum temperature can be the upper limit of the battery's safe operating temperature range, such as 50°C. The safe operating temperature range can be either the battery's own temperature range or the ambient temperature range, and must be consistent with the set temperature in the operating conditions. That is, if the set temperature in the operating conditions is the battery's own temperature, then the maximum temperature also refers to the battery's own temperature; if the set temperature in the operating conditions is the ambient temperature, then the maximum temperature is also the ambient temperature.

[0061] In this embodiment, the temperature at which cooling is last activated under each set SOC is determined by a backward calculation method, which is the cooling power activation temperature threshold corresponding to each set SOC.

[0062] During the charging process, the battery's operating conditions change in real time and get closer and closer to the charging cutoff condition. The reverse calculation can be understood as calculating each operating condition in the opposite direction to the direction of change of the operating conditions during charging. That is, the operating conditions are calculated separately for each of the multiple operating conditions in order of their proximity to the charging cutoff condition from large to small. The greater the proximity, the closer the battery is to the charging cutoff condition.

[0063] The degree of similarity between the operating condition and the charging cutoff condition can be determined jointly based on the first difference between the set SOC and the charging cutoff SOC in the operating condition, and the second difference between the set temperature and the maximum temperature in the operating condition. For multiple operating conditions, when determining the relationship between the degree of similarity, first determine the first difference for each condition; the smaller the first difference, the greater the degree of similarity. For operating conditions with the same first difference, then determine the second difference; the smaller the second difference, the greater the degree of similarity.

[0064] As an example, with Figure 2 Taking the multiple operating conditions shown as examples, for ease of description, each operating condition is represented in the form of (set temperature, set SOC). Under the condition of charging cutoff (50℃, 97% SOC), among the multiple operating conditions, the one closest to the charging cutoff condition is (50℃, 97% SOC), followed by (45℃, 97% SOC), then (40℃, 97% SOC), and so on. (50 cycles, 90% SOC) is ranked after (-20℃, 97% SOC).

[0065] For each operating condition, when determining its corresponding temperature rise, it is necessary to check whether any of the previously calculated operating conditions require cooling. Operating conditions requiring cooling refer to those where the battery temperature exceeds the maximum temperature when charging from that condition to the State of Charge (SOC) cutoff. If any of the previously calculated conditions require cooling, then when determining the temperature rise for the current operating condition, the battery's heat generation power and the thermal management power used for cooling must be considered. This is because the operating condition changes in real time from the current condition to the SOC cutoff, meaning this process involves the previously calculated conditions. Therefore, if the previously calculated conditions require cooling, the thermal management power used for cooling must be considered during this charging process. Conversely, if no of the previously calculated conditions require cooling, then when determining the temperature rise for the current condition, the thermal management power required from charging from that condition to the SOC cutoff is considered to be zero. Therefore, the temperature rise for the current condition can be calculated solely based on the battery's heat generation power.

[0066] S14. Determine the first operating condition among multiple operating conditions. The first operating condition refers to the operating condition in which the sum of the set temperature and the corresponding temperature rise is greater than the maximum temperature.

[0067] The first operating condition is the operating condition that requires cooling to be turned on, as mentioned above. Here, the first operating condition among multiple operating conditions refers to the operating condition that meets the condition that the sum of the set temperature and the corresponding temperature rise is greater than the maximum temperature. All the operating conditions that are determined are designated as the first operating condition.

[0068] The method for determining whether an operating condition is the first operating condition includes: adding the set temperature included in the operating condition to the temperature rise corresponding to the operating condition, and determining the sum as the predicted battery temperature value when the battery is charged from the operating condition to the state of charge cutoff. If the predicted battery temperature value is greater than the maximum temperature, it violates the principle of "keeping the battery temperature within the safety boundary throughout the charging process". Therefore, in order not to violate this principle, if the predicted battery temperature value corresponding to the operating condition is greater than the maximum temperature, it is determined that cooling needs to be turned on under the operating condition, and thus the operating condition is determined as the first operating condition.

[0069] S15. Based on the set temperature included in the first operating condition, determine the cooling power activation temperature threshold corresponding to each set SOC in multiple operating conditions.

[0070] In some embodiments of this application, such as Figure 2 As shown, the multiple operating conditions include 5% SOC, 10% SOC, 15% SOC, 20% SOC, 25% SOC, 30% SOC, 40% SOC, 45% SOC, 50% SOC, 55% SOC, 60% SOC, 65% SOC, 70% SOC, 75% SOC, 80% SOC, 85% SOC, 90% SOC, and 97% SOC, for a total of 18 set SOCs. Therefore, based on the set temperature included in the first operating condition, the cooling power activation temperature threshold corresponding to each of these 18 set SOCs can be determined.

[0071] The battery thermal management strategy determination method provided in the embodiment determines multiple working conditions of the battery and a permissible charging rate corresponding to each working condition, determines, for each working condition, a battery body heat generation power of the battery when charging in the working condition according to the permissible charging rate in the working condition, determines, in order of proximity from large to small between the working conditions and a preset charging cutoff working condition, a temperature rise corresponding to each working condition in the multiple working conditions, determines a first working condition in the multiple working conditions, the first working condition refers to a working condition containing a set temperature and a sum value of the corresponding temperature rise greater than a maximum temperature, and determines, according to the set temperature contained in the first working condition, a cooling power opening temperature threshold corresponding to each set SOC in the multiple working conditions. According to the embodiment, by analyzing the temperature change of the battery when charging in multiple working conditions, the cooling power opening temperature threshold corresponding to each set SOC is determined, and based on the cooling power opening temperature threshold corresponding to each set SOC, transient thermal management of the battery can be realized. Compared with the traditional thermal management strategy based on the initial working condition, the transient thermal management has higher accuracy and is more accurate, and can effectively improve the battery charging rate.

[0072] In some embodiments, determining, according to the set temperature contained in the first working condition, the cooling power opening temperature threshold corresponding to each set SOC can include:

[0073] The following steps are performed for each set SOC respectively:

[0074] Determine a second working condition containing the set SOC in the first working condition;

[0075] Determine a minimum set temperature contained in the second working condition;

[0076] Determine the minimum set temperature as the cooling power opening temperature threshold corresponding to the set SOC.

[0077] The determination of the second working condition containing the set SOC in the first working condition refers to the determination of all working conditions containing the set SOC in the first working condition, and all the determined working conditions are determined as the second working condition corresponding to the set SOC.

[0078] The cooling power opening temperature threshold determined in the above manner is an envelope of the cooling power opening temperature thresholds of all single batteries in the battery, and based on this, the thermal management based on the cooling power opening temperature threshold corresponding to each set SOC determined in the above manner can avoid the temperature of all single batteries in the battery being greater than the maximum temperature.

[0079] In some embodiments, the battery thermal management can heat the battery in addition to cooling the battery, and therefore, when determining the battery thermal management strategy, a heating power on temperature threshold corresponding to each set SOC can also be determined. Specifically, in order of decreasing proximity of the working condition to the charging cutoff working condition, each working condition in the plurality of working conditions can be determined in turn, and before determining the temperature rise corresponding to each working condition, the following steps can be performed first:

[0080] The maximum charging rate corresponding to each working condition is determined respectively;

[0081] A third working condition in the plurality of working conditions is determined, the third working condition contains a temperature less than the maximum temperature, and the allowable charging rate corresponding to the third working condition is less than the maximum charging rate corresponding to the third working condition;

[0082] According to the set temperature contained in the third working condition, a heating on temperature threshold corresponding to each set SOC is determined respectively.

[0083] The maximum charging rate corresponding to each working condition can be determined based on the battery parameters.

[0084] In the embodiments of the present application, determining the third working condition in the plurality of working conditions means determining all working conditions in the plurality of working conditions that satisfy the condition that the temperature is less than the maximum temperature and the allowable charging rate corresponding to the working condition is less than the maximum charging rate corresponding to the working condition, and all the determined working conditions are determined as the third working condition.

[0085] As an example, for each working condition in the plurality of working conditions as shown in Figure 2 , whether the working condition is the third working condition can be determined based on the following formula respectively:

[0086]

[0087] Wherein, represents the heating power of the thermal management corresponding to the working condition (i, j), the working condition (i, j) refers to the working condition composed of the set temperature of the i-th row and the set SOC of the j-th column in the parameter table as shown in Figure 2 , in order to take i as 1 and j as 2, the working condition (i, j) is the working condition (-20℃, 10%), 7 refers to the heating power, which is only an example, and the heating power can be different according to the structure of the thermal management system adopted, C i,j represents the allowable charging rate corresponding to the working condition (i, j), represents the maximum charging rate corresponding to the working condition (i, j). As shown in Figure 2 , for the working condition where i<13, the set temperature contained therein is less than 50℃, which is usually within the safe working temperature range, the higher the temperature, the faster the charging rate, and therefore, for such a working condition, if the allowable charging rate is less than the maximum charging rate, that is To further improve the charging rate, it can be heated, that is, to start heating power, so its corresponding heating power is 7, and for i≥13 conditions, the set temperature in which is greater than or equal to 50℃, if heated again will cause the battery temperature to exceed the maximum temperature 50℃, so it cannot be heated, so the heating power corresponding to this condition is 0, in addition, for the condition that the allowable charging rate is greater than or equal to the maximum charging rate, that is If heating will cause the allowable charging rate to be greater than the maximum charging rate, heating is also not allowed, so the heating power corresponding to this condition is 0.

[0088] As an example, see Figure 4 , the heating power corresponding to multiple conditions in Figure 2 represents the intention, which includes the set SOC, set temperature and corresponding heating power contained in each condition, where the parameter value in the first row is the set SOC, the parameter value in the second column is the set temperature, and the remaining parameter values are the heating power in addition to the set SOC and the set temperature. The condition with a heating power of 7 is the third condition. As shown in Figure 4 , there are usually multiple third conditions under the same set SOC, based on which the heating power opening temperature threshold corresponding to each set SOC can be determined to envelope the corresponding heating power opening temperature threshold of all single batteries in the battery.

[0089] In some embodiments, determining the heating power opening temperature threshold corresponding to each set SOC in multiple conditions according to the set temperature contained in the third condition can include:

[0090] For each set SOC, the following steps are performed respectively:

[0091] Determine the fifth condition in the third condition that contains the set SOC;

[0092] Determine the maximum set temperature contained in the fifth condition;

[0093] Determine the maximum set temperature as the heating power opening temperature threshold corresponding to the set SOC.

[0094] Determine the fifth condition in the third condition that contains the set SOC means to determine all conditions in the third condition that contain the set SOC, and all determined conditions are determined as the fifth condition corresponding to the set SOC.

[0095] The heating power start temperature threshold of each set SOC determined in the above manner can envelop the corresponding heating power start temperature threshold of all single batteries in the battery, and the thermal management of the battery based on the heating power start temperature threshold and the cooling power start temperature threshold of each set SOC can limit the charging path of all single batteries in the battery within the optimal charging interval, thereby improving the battery charging efficiency.

[0096] In some embodiments, the temperature rise corresponding to each of the plurality of working conditions can be determined in order of proximity of the working condition to the charging cutoff working condition from large to small, which can include:

[0097] The working conditions remaining after removing the third working condition from the plurality of working conditions are taken as fourth working conditions.

[0098] The temperature rise corresponding to each of the fourth working conditions is determined in order of proximity of the working condition to the charging cutoff working condition from large to small.

[0099] The working conditions remaining after removing the third working condition from the plurality of working conditions are taken as fourth working conditions means that all working conditions remaining after removing all third working conditions from the plurality of working conditions are determined as fourth working conditions.

[0100] Because the third working condition has been determined to be a working condition requiring heating based on the above process, and it is impossible to both heat and cool in the same working condition, it is impossible to cool in the third working condition, so when determining the cooling power start threshold, it is not necessary to consider the third working condition, and only the fourth working condition needs to be analyzed, thereby reducing the workload.

[0101] In some embodiments, the temperature rise corresponding to each of the fourth working conditions can be determined in order of proximity of the working condition to the charging cutoff working condition from large to small, which can include:

[0102] For each of the fourth working conditions, when determining the temperature rise corresponding to the working condition, it is determined whether the working condition preceding the working condition in the determination order contains the first working condition.

[0103] In the case where the first working condition is not contained in the working condition preceding the working condition, the battery body heating power corresponding to the working condition is taken as the total heating power corresponding to the working condition.

[0104] In the case where the first working condition is contained in the working condition preceding the working condition, the sum of the battery body heating power corresponding to the working condition and the preset cooling power is taken as the total heating power corresponding to the working condition.

[0105] The temperature rise corresponding to the working condition is determined according to the total heating power corresponding to the working condition.

[0106] As an example, in the case where the first working condition is the working condition with the highest temperature rise, the working condition with the second highest temperature rise is the working condition with the second highest temperature rise, and the working condition with the third highest temperature rise is the working condition with the third highest temperature rise, the working condition with the fourth highest temperature rise is the working condition with the fourth highest temperature rise, and the working condition with the fifth highest temperature rise is the working condition with the fifth highest temperature rise. Figure 4For example, the working condition corresponding to the heating power of 0 is the fourth working condition, and the order of the proximity of the working condition to the charging cutoff working condition from large to small is Figure 4 The order is indicated by the arrow, and the direction of the arrow is from large proximity to small proximity.

[0107] For each working condition in the fourth working condition, when determining the corresponding temperature rise, it is determined whether the working condition located in front of the working condition in the determination order contains the first working condition, that is, whether there is a working condition that needs to be cooled in the working condition of the previous calculation. In the case where it is determined that there is a first working condition, the temperature rise corresponding to the current working condition is determined based on the battery body heat generation power corresponding to the current working condition and the cooling power of the thermal management, and in the case where it is determined that there is no first working condition, the temperature rise corresponding to the current working condition is determined based on the battery body heat generation power corresponding to the current working condition.

[0108] In the above manner, the determined temperature rise can be more in line with the actual situation.

[0109] In some embodiments, determining the temperature rise corresponding to the working condition according to the total heat generation power corresponding to the working condition can include:

[0110] According to the allowable charging rate corresponding to the working condition, the time step corresponding to the working condition is determined, and the time step is used to indicate the theoretical charging time required for the battery to charge from the working condition to the charging cutoff SOC;

[0111] The product of the total heat generation power corresponding to the working condition and the time step is determined as the heat generation corresponding to the working condition;

[0112] The ratio of the heat generation to the thermal heat capacity of the battery is determined as the temperature rise corresponding to the working condition.

[0113] In some embodiments of the present application, the time required for the battery to be fully charged in a working condition is inversely proportional to the charging rate in the working condition, so for each working condition, the reciprocal of the allowable charging rate corresponding to the working condition can be converted to a unit to serve as the time step corresponding to the working condition. Wherein, the unit conversion refers to converting the unit of the reciprocal of the allowable charging rate to time, for example, to hours.

[0114] In some embodiments of the present application, the thermal heat capacity of the battery is the product of the total mass of the battery and the specific heat capacity of the battery, and the specific heat capacity of the battery refers to the heat capacity of the battery under unit mass, that is, the heat absorbed or released when changing unit temperature under unit mass. The total mass and heat capacity ratio of the battery can be directly obtained from the existing parameters of the battery, so the thermal heat capacity of the battery can be calculated according to the battery parameters.

[0115] As an example, for each working condition, the corresponding first temperature rise can be calculated according to the following formula:

[0116]

[0117] In the formula, T i,j represents the temperature rise corresponding to the working condition (i, j), m represents the total mass of the battery, c represents the heat capacity ratio of the battery, represents the heat generation power of the battery body corresponding to the working condition (i, j), represents the heat management power corresponding to the working condition (i, j), and according to the state of the working condition, the value can be the heating power, the cooling power or 0 of the heat management system, for example, in the case where the total heat generation power corresponding to the working condition is the heat generation power of the battery body, the value of is 0, in the case where the total heat generation power corresponding to the working condition is the sum of the heat generation power of the battery body and the cooling power, the value of is just the cooling power of the heat management system, for example, 10 kW.

[0118] In the above manner, the temperature rise of the battery corresponding to each working condition can be determined.

[0119] For each working condition in the fourth working condition, after the temperature rise corresponding to the working condition is determined, whether the working condition is the first working condition can be determined based on the temperature rise.

[0120] As an example, taking the fourth working condition (i0, j0) in the fourth working condition as an example, whether the working condition is the first working condition can be determined based on the following logic: Figure 4

[0121] and i0≤14

[0122]

[0123] i0=i 0+1 ,j0=j 0+n

[0124] wherein, represents the cooling power of the heat management of the working condition (i0, j0), T i,j represents the temperature rise corresponding to the working condition (i0, j0), and 10 represents the cooling power, which is only an example, and the cooling power can also be different according to the structure of the heat management system adopted. As shown in Figure 3 if i0≤14 in (i0, j0), the set temperature in the working condition (i0, j0) does not exceed 45℃, in this case, if T i,j is less than 5℃, the temperature of the battery after rising will also not exceed the maximum temperature 50℃, therefore, the cooling does not need to be turned on in this working condition, if i0>14 in (i0, j0), and T i,j ​If the temperature rises above 5°C, the battery temperature will exceed the maximum temperature of 50°C. Therefore, cooling needs to be activated under this condition.

[0125] See Figure 5 , in order to Figure 2 The table shows the thermal management power for various operating conditions. It includes the set SOC, set temperature, and corresponding battery heating power for each condition. The parameter values ​​in the first row are the set SOC, the parameter values ​​in the second column are the set temperature, and the remaining parameters (excluding SOC and temperature) are the thermal management power. 7 represents heating power, and -10 represents cooling power. For a condition with a thermal management power of 7, the battery requires heating under this condition. For a condition with a thermal management power of 0, the battery does not require thermal management (neither heating nor cooling). For a condition with a thermal management power of -10, the battery requires cooling under this condition.

[0126] Using the above method, the first working condition among multiple working conditions can be accurately identified.

[0127] In some embodiments, after determining the cooling power activation temperature threshold and heating power activation temperature threshold corresponding to each set SOC through the embodiments of this application, a thermal management strategy containing the cooling power activation temperature threshold and heating power activation temperature threshold corresponding to each set SOC can be generated. During battery charging, the thermal management system can be controlled to heat or cool based on the thermal management strategy to achieve thermal management of the battery.

[0128] As an example, when thermally managing a battery using a thermal management strategy that includes cooling power activation temperature thresholds and heating power activation temperature thresholds corresponding to each set SOC, such as... Figure 6 As shown, it may include the following steps:

[0129] S61. During battery charging, determine the real-time operating conditions of the battery, including real-time SOC and real-time temperature;

[0130] S62. Determine the first cooling power activation temperature threshold and the first heating power activation temperature threshold corresponding to the real-time SOC from the thermal management strategy;

[0131] S63. Compare the real-time temperature with the first cooling power activation temperature threshold and the first heating power activation temperature threshold respectively. If the real-time temperature is greater than the first cooling power activation temperature threshold, execute S64. If the real-time temperature is less than the first heating power activation temperature threshold, execute S65.

[0132] S64. Controlling the thermal management system to cool the battery;

[0133] S65. Controlling the thermal management system to heat the battery.

[0134] In the above manner, during the charging process, the working condition of the battery is acquired in real time, the thermal management mode is adjusted in real time based on the temperature threshold corresponding to the real-time working condition in the thermal management strategy, thereby meeting the demand of the fastest charging path for thermal management, limiting the charging path of all single batteries in the battery to the optimal charging interval, and enabling the battery to reach the full charge state in the shortest time.

[0135] Based on the battery thermal management strategy determination method provided in the above embodiments, the application also provides a specific implementation of a battery thermal management strategy determination device. Please refer to the following embodiments.

[0136] Referring to Figure 7 The battery thermal management strategy determination device provided in the embodiments of the application includes the following modules:

[0137] The determination module 701 is configured to determine a plurality of working conditions of the battery and a permissible charging rate corresponding to each working condition, each working condition including a set state of charge (SOC) and a set temperature, and the set temperature including a temperature of the battery and / or a temperature of an environment in which the battery is located.

[0138] The power determination module 702 is configured to, for each working condition, determine a battery body heat generation power of the battery when charging in the working condition according to the permissible charging rate in the working condition.

[0139] The temperature rise determination module 703 is configured to determine, in order of decreasing proximity of the working conditions to a preset charging cutoff working condition, a temperature rise corresponding to each working condition in the plurality of working conditions, wherein the charging cutoff working condition includes a charging cutoff SOC and a maximum temperature, the temperature rise corresponding to each working condition is used to indicate a change in the temperature of the battery from the working condition to the charging cutoff SOC, and the temperature rise is determined based on the battery body heat generation power corresponding to the working condition and a thermal management power required during the process of charging from the working condition to the charging cutoff SOC.

[0140] The first working condition determination module 704 is configured to determine a first working condition in the plurality of working conditions, the first working condition being a working condition in which the sum of the set temperature and the corresponding temperature rise is greater than the maximum temperature.

[0141] The cooling threshold determination module 705 is configured to determine, according to the set temperature included in the first working condition, a cooling power opening temperature threshold corresponding to each set SOC.

[0142] The battery thermal management strategy determination apparatus provided in the embodiment determines multiple working conditions of the battery and a permissible charging rate corresponding to each working condition, determines, for each working condition, a battery body heat generation power when charging according to the permissible charging rate under the working condition, determines, in order of proximity from large to small of each working condition to the preset charging cutoff working condition, a temperature rise corresponding to each working condition in the multiple working conditions, determines a first working condition in the multiple working conditions, the first working condition refers to a working condition containing a sum value of a set temperature and a corresponding temperature rise greater than a maximum temperature, and determines, according to the set temperature contained in the first working condition, a cooling power opening temperature threshold value corresponding to each set SOC. According to the embodiment, by analyzing the temperature change of the battery when charging under multiple working conditions, the cooling power opening temperature threshold value corresponding to each set SOC contained in multiple set SOCs is determined, and based on the cooling power opening temperature threshold value corresponding to each set SOC, transient thermal management of the battery can be realized. Compared with the thermal management based on the initial working condition in the conventional thermal management strategy, the transient thermal management has higher precision and is more accurate, and can effectively improve the battery charging rate.

[0143] In some embodiments, the cooling threshold determination module 705 is configured to:

[0144] For each set SOC, determine a second working condition in the first working condition containing the set SOC;

[0145] Determine a minimum set temperature contained in the second working condition;

[0146] Determine the minimum set temperature as the cooling power opening temperature threshold value corresponding to the set SOC.

[0147] In some embodiments, the apparatus further comprises:

[0148] The maximum rate determination module is configured to, before determining, in order of proximity from large to small of each working condition to the charging cutoff working condition, the temperature rise corresponding to each working condition in the multiple working conditions, determine a maximum charging rate corresponding to each working condition, respectively;

[0149] The third working condition determination module is configured to determine a third working condition in the multiple working conditions, the third working condition containing a temperature less than the maximum temperature and the permissible charging rate corresponding to the third working condition being less than the maximum charging rate corresponding thereto;

[0150] The heating threshold determination module is configured to, according to the set temperature contained in the third working condition, determine a heating opening temperature threshold value corresponding to each set SOC, respectively;

[0151] Correspondingly, the temperature rise determination module 703 is configured to:

[0152] Remove the third working condition from the multiple working conditions to obtain a fourth working condition;

[0153] The temperature rise of each working condition in the fourth working condition is determined in order of proximity from the working condition to the charging cut-off working condition.

[0154] In some embodiments, the heating threshold determination module is configured to:

[0155] For each set SOC, a fifth working condition containing the set SOC in the third working condition is determined.

[0156] A set temperature maximum value contained in the fifth working condition is determined.

[0157] The set temperature maximum value is determined as a heating power start temperature threshold corresponding to the set SOC.

[0158] In some embodiments, the temperature rise determination module 703 comprises:

[0159] The judgment submodule is configured to, for each working condition in the fourth working condition, determine whether the first working condition is contained in the working conditions located in front of the working condition in the order when determining the temperature rise corresponding to the working condition.

[0160] The total heating power determination submodule is configured to, in the case that the first working condition is not contained in the working conditions located in front of the working condition, take the battery body heating power corresponding to the working condition as the total heating power corresponding to the working condition; and in the case that the first working condition is contained in the working conditions located in front of the working condition, take the sum of the battery body heating power corresponding to the working condition and the preset cooling power as the total heating power corresponding to the working condition.

[0161] The temperature rise determination submodule is configured to determine the temperature rise corresponding to the working condition according to the total heating power.

[0162] In some embodiments, the temperature rise determination submodule is configured to:

[0163] According to the allowable charging rate corresponding to the working condition, a time step corresponding to the working condition is determined, the time step being used to indicate a theoretical charging duration required by the battery from the working condition to the charging cut-off SOC.

[0164] A product of the total heating power corresponding to the working condition and the time step is determined as a heat generation amount corresponding to the working condition.

[0165] A ratio of the heat generation amount to the heat capacity of the battery is determined as the temperature rise corresponding to the working condition.

[0166] The battery thermal management strategy determination apparatus provided by the embodiments of the present application can realize Figures 1 to 6 The method embodiments realize various processes, and thus details are not repeated here.

[0167] Figure 8 A hardware structure schematic diagram of an electronic device provided by the embodiments of the present application is shown.

[0168] The electronic device can include a processor 801 and a memory 802 having stored computer program instructions.

[0169] In particular, the processor 801 described above can include a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or can be configured to implement one or more integrated circuits that embody the embodiments of the present application.

[0170] The memory 802 can include a mass storage for data or instructions. By way of example and not limitation, the memory 802 can include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a Universal Serial Bus (USB) drive or a combination of two or more of these. The memory 802 can include removable or non-removable (or fixed) media, where appropriate. The memory 802 can be internal or external to the integrated gateway disaster recovery device, as appropriate. In particular embodiments, the memory 802 is non-volatile, solid-state memory. The memory 802 can also include read-only memory (ROM), random-access memory (RAM), a magnetic disk storage medium, an optical storage medium, a flash memory device, electrical, optical, or other physical / tangible memory storage device. Thus, in general, the memory 802 includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software that, when executed (by one or more processors), is operable to implement the battery thermal management policy determination method described in any of the embodiments above.

[0171] The processor 801 implements the battery thermal management policy determination method described in any of the embodiments above by reading and executing the computer program instructions stored in the memory 802.

[0172] In one example, the electronic device can further include a communication interface 803 and a bus 810. As shown, the processor 801, the memory 802, and the communication interface 803 are connected through the bus 810 and complete communication among each other. Figure 8

[0173] The communication interface 803 is mainly used to realize the communication between the modules, devices, units and / or equipment in the embodiments of the present application.

[0174] ​Bus 810 includes a hardware, software, or both that couples components of the online data traffic metering device to each other. As an example and not by way of limitation, the bus can include an accelerated graphics port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a front-side bus (FSB), a HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand (IB) interconnect, a low pin count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards board (VLB) bus, or another suitable bus or a combination of two or more of these. Where suitable, bus 810 can include one or more buses. Although this application describes and illustrates a particular bus, this application contemplates any suitable bus or interconnect.

[0175] In addition, in combination with the battery thermal management strategy determination method in the above embodiments, the embodiments of the present application can provide a computer storage medium to implement. The computer storage medium has computer program instructions stored thereon; the computer program instructions are executed by a processor to implement any one of the battery thermal management strategy determination methods in the above embodiments.

[0176] It needs to be clear that the present application is not limited to the specific configurations and processes described above and shown in the drawings. For the sake of brevity, detailed descriptions of well-known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present application are not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between steps, after understanding the spirit of the present application.

[0177] The functional blocks shown in the structural block diagrams described above can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a functional card, etc. When implemented in software, the elements of the present application are program or code segments used to perform the required tasks. The program or code segments can be stored in a machine-readable medium or transmitted through a data signal carried in a carrier wave over a transmission medium or communication link. The "machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. The code segments can be downloaded via a computer network such as the Internet, an intranet, etc.

[0178] It is also need to be explained that the example embodiments mentioned in the present application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiments, can be different from the order in the embodiments, or several steps are performed simultaneously.

[0179] The computer program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other processing device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other processing device to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks.

[0180] The above describes only the specific implementation of the present application, and those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system, module and unit can refer to the corresponding process in the foregoing method embodiments, which will not be described here. It should be understood that the protection scope of the present application is not limited to this, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed in the present application, and these modifications or replacements shall be covered within the protection scope of the present application.

Claims

1. A method for determining a battery thermal management strategy, the method comprising: The method comprises the following steps: determining a plurality of working conditions of a battery and a corresponding allowable charging rate of each working condition, each working condition containing a set state of charge (SOC) and a set temperature, different working conditions containing different set states of charge (SOC) and / or set temperatures, and the set temperature including the temperature of the battery and / or the temperature of the environment in which the battery is located; for each working condition, determining the battery body heat generation power of the battery when charging in the working condition according to the allowable charging rate in the working condition; determining the temperature rise corresponding to each working condition in the plurality of working conditions in order of the proximity of the working condition to a preset charging cutoff working condition from large to small, wherein the charging cutoff working condition contains a charging cutoff SOC and a maximum temperature, the temperature rise corresponding to the working condition is used to indicate the change in the battery temperature when the battery is charged from the working condition to the charging cutoff SOC, and the temperature rise corresponding to the working condition is determined based on the battery body heat generation power corresponding to the working condition and the heat management power required during the charging from the working condition to the charging cutoff SOC; determining a first working condition in the plurality of working conditions, the first working condition being the working condition containing a set temperature whose sum with the corresponding temperature rise is greater than the maximum temperature; determining a cooling power opening temperature threshold corresponding to each set SOC in the plurality of working conditions according to the set temperature contained in the first working condition.

2. The method of claim 1, wherein, The method further comprises the following steps before determining the temperature rise corresponding to each working condition in the plurality of working conditions in order of the proximity of the working condition to the preset charging cutoff working condition from large to small: determining a maximum charging rate corresponding to each working condition; determining a third working condition in the plurality of working conditions, the third working condition containing a temperature less than the maximum temperature and the allowable charging rate corresponding to the third working condition being less than the corresponding maximum charging rate; determining a heating opening temperature threshold corresponding to each set SOC according to the set temperature contained in the third working condition; 3. The method according to claim 1 or 2, characterized in that, The method further comprises the following steps before determining the temperature rise corresponding to each working condition in the plurality of working conditions in order of the proximity of the working condition to the preset charging cutoff working condition from large to small: regarding the working conditions remaining after removing the third working condition from the plurality of working conditions as fourth working conditions; determining the temperature rise corresponding to each working condition in the fourth working conditions in order of the proximity of the working condition to the charging cutoff working condition from large to small. The method further comprises the following steps before determining the heating power opening temperature threshold corresponding to each set SOC according to the set temperature contained in the third working condition: for each set SOC, determining a fifth working condition containing the set SOC in the third working condition; determining a set temperature maximum value contained in the fifth working condition; determining the set temperature maximum value as the heating power opening temperature threshold corresponding to the set SOC.

4. The method of claim 3, wherein, ​ ​ ​ ​ 5. The method of claim 3, wherein, The order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition is used to determine the temperature rise corresponding to each of the fourth working conditions in sequence, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness of each of the working conditions to the preset charging cut-off working condition, and the temperature rise corresponding to each of the fourth working conditions is determined in sequence according to the order from large to small of the closeness ​ ​ ​ ​ 6. The method of claim 5, wherein, ​ ​ ​ ​ 7. A battery thermal management strategy determination apparatus characterized by comprising: ​ ​ ​ ​ ​ ​ 8. An electronic device, comprising: ​ ​ 9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer program instructions, and the computer program instructions are executed by a processor to implement the steps of the battery thermal management strategy determination method in any one of claims 1-6.

10. A vehicle characterized by comprising: The battery thermal management strategy determination device in claim 7 is included.

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