Thermal management control method, device, electronic equipment, vehicle and system

Abstract

This application relates to a thermal management control method, apparatus, electronic device, vehicle, and system, belonging to the field of thermal management technology. It at least addresses the technical problem in related technologies where the accuracy of determining the reference temperature threshold for thermal management of a power battery is low, resulting in poor control performance of thermal management of the power battery. The method includes: determining a target current and a first state of charge (SOC) of the power battery while charging it, wherein the target current is the average current of the charging pile or the output current of the charging pile; determining a first temperature threshold based on the target current, the first SOC, and a first preset relationship, wherein the first preset relationship indicates the correspondence between multiple currents, multiple SOCs, and multiple thermal management activation temperature thresholds; and performing thermal management of the power battery charging process based on the first temperature threshold. This application can improve the accuracy of determining the reference temperature threshold for thermal management of a power battery.

Description

Technical Field

[0001] This application relates to the field of thermal management technology, specifically to a thermal management control method, device, electronic equipment, vehicle, and system. Background Technology

[0002] With the rapid development of new energy vehicles, power batteries, as a crucial energy source, require well-designed thermal management control strategies to provide suitable operating temperatures, thereby improving battery performance and lifespan. Currently, the cooling thermal management strategies for power batteries in new energy vehicles during charging are relatively simplistic. Specifically, they determine whether to activate cooling thermal management control based on a set temperature threshold to cool the battery to that threshold. However, due to varying operating conditions across different vehicles, the battery temperature can become excessively high or low in some situations, leading to prolonged charging times and poor adaptability. In such cases, charging processes with lower charging pile output capacity (maximum output current) waste cooling power; while charging processes with higher charging pile output capacity and lower battery state of charge (SOC) result in excessive heat generation and rapid temperature rise in the battery, accelerating battery aging and impacting its lifespan.

[0003] In related technologies, a first preset temperature threshold and a second preset temperature threshold are determined based on the charging power of the charging components and the state of charge (SOC) of the battery pack. Then, the relationship between the current temperature of the battery pack and these two thresholds is determined to decide whether to activate the heating or cooling components to adjust the battery pack temperature to match the charging power. This technical solution only describes determining the preset temperature threshold based on relevant parameters to determine whether to adjust the battery pack temperature, without specifying how the preset temperature threshold is determined. In another related technology, a charging current limit is determined based on a first request current from the device to be charged, the current SOC, and a second request current from the load device. Further, it is determined whether the charging current limit is within a preset range to determine the output charging current at the charging pile. This technical solution discloses how to determine the output charging current at the charging pile, but does not explain how thermal management is performed during charging. Therefore, the accuracy of determining the reference temperature threshold for thermal management of power batteries during current charging is low, resulting in poor control of thermal management, low charging efficiency, accelerated aging, and reduced lifespan of the power batteries. Summary of the Invention

[0004] This application provides a thermal management control method, device, electronic device, vehicle, and system. The purpose of this application is to at least solve the technical problem in the related art that the accuracy of determining the reference temperature threshold for thermal management of power batteries is low, resulting in poor control effect of thermal management of power batteries and low charging efficiency of power batteries.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] According to a first aspect provided in this application, a thermal management control method is provided, the method comprising: determining a target current and a first state of charge of the power battery when charging the power battery, wherein the target current is the average current when the charging pile charges the power battery or the output current of the charging pile; determining a first temperature threshold based on the target current, the first state of charge and a first preset relationship, wherein the first preset relationship is used to indicate the correspondence between multiple currents, multiple states of charge and multiple thermal management activation temperature thresholds; and performing thermal management on the charging process of the power battery based on the first temperature threshold.

[0007] Based on the aforementioned technical means, this application can determine a first temperature threshold by combining the average current or output current of the charging pile during the charging of the power battery with the first state of charge of the power battery and a first preset relationship, thereby enabling thermal management of the power battery charging process based on the first temperature threshold. Since the first preset relationship is predetermined, it indicates the correspondence between multiple currents, multiple states of charge, and multiple thermal management activation temperature thresholds. Therefore, given the average current or output current of the charging pile during charging of the power battery, and the first state of charge of the power battery, the first temperature threshold corresponding to the power battery in that charging state can be accurately determined based on the first preset relationship. Thus, thermal management of the power battery based on this first temperature threshold can improve the control effect of thermal management and increase the charging efficiency of the power battery.

[0008] In one possible implementation, determining the target current includes: acquiring the average current and the requested current sent by the power battery to the charging pile; if the difference between the requested current and the average current is greater than a preset threshold, determining the target current as the average current; if the difference between the requested current and the average current is less than or equal to the preset threshold, acquiring the output current of the charging pile and determining the target current as the output current.

[0009] Based on the aforementioned technical means, this application can determine the target current as either the average current or the output current of the charging pile by determining the relationship between the difference between the average current when the charging pile charges the power battery and the requested current sent by the power battery to the charging pile, and a preset threshold. Thus, under different circumstances, different current parameters can be used to determine the corresponding first temperature threshold, thereby further improving the accuracy of determining the reference temperature threshold for thermal management of the power battery.

[0010] In one possible implementation, the above-mentioned thermal management of the charging process of the power battery based on a first temperature threshold includes: obtaining the temperature of each of the plurality of battery cells included in the power battery; and determining that the thermal management of the power battery is to reduce the temperature of the power battery when the temperature of any of the plurality of battery cells is greater than or equal to the first temperature threshold.

[0011] Based on the aforementioned technical means, this application can accurately determine the timing for activating thermal management of the power battery by judging the relationship between the temperature of each of the multiple battery cells in the power battery and a first temperature threshold. Therefore, when the temperature of any of the multiple battery cells is greater than or equal to the first temperature threshold, thermal management is activated to reduce the temperature of the power battery. This further ensures that the power battery temperature does not exceed the threshold during charging, and allows for timely cooling of the power battery.

[0012] In one possible implementation, the method further includes: obtaining the second state of charge of the power battery after thermal management; determining a second temperature threshold based on the target current, the second state of charge, and a second preset relationship, wherein the second preset relationship indicates the correspondence between multiple currents, multiple states of charge, and multiple thermal management stop temperature thresholds, and the thermal management start temperature threshold corresponding to the same current and the same state of charge in the first preset relationship is different from the thermal management stop temperature threshold corresponding to the same current and the same state of charge in the second preset relationship; and stopping thermal management of the power battery when the temperature of the battery cell with the highest temperature among the multiple battery cells is less than or equal to the second temperature threshold.

[0013] Based on the aforementioned technical means, this application can, after thermal management of the power battery, further determine a second temperature threshold based on the second state of charge, target current, and a second preset relationship of the power battery after thermal management. This second temperature threshold is then used to determine whether the temperature of the hottest battery cell among multiple battery cells exceeds the second temperature threshold. Thermal management of the power battery is stopped when the temperature of any battery cell does not exceed the second temperature threshold. Thus, the second temperature threshold used to determine whether to stop thermal management can be re-determined based on the real-time changing state of charge of the power battery and the second preset relationship. This allows for accurate determination of whether to stop thermal management of the power battery based on the relationship between the temperature of the hottest battery cell and the second temperature threshold. This enables timely cessation of thermal management of the power battery when it is not needed, avoiding energy waste.

[0014] In one possible implementation, determining the first temperature threshold based on the target current, the first state of charge, and the first preset relationship includes: determining the first temperature threshold based on the lower current limit, the first state of charge, and the first preset relationship when the target current is less than the lower current limit corresponding to the first preset relationship; and determining the first temperature threshold based on the upper current limit, the first state of charge, and the first preset relationship when the target current is greater than the upper current limit corresponding to the first preset relationship.

[0015] Based on the aforementioned technical means, this application can determine a corresponding first temperature threshold when the target current exceeds the lower or upper current limit corresponding to the first preset relationship, based on the lower or upper current limit, the first state of charge, and the first preset relationship. Thus, even when the target current is too small or too large, the corresponding first temperature threshold can still be determined through the first preset relationship. This further improves the accuracy of determining the reference temperature threshold for thermal management of the power battery.

[0016] In one possible implementation, determining the first temperature threshold based on the lower current limit, the first state of charge, and the first preset relationship includes: determining the thermal management activation temperature threshold corresponding to the lower current limit and the first state of charge in the first preset relationship as the first temperature threshold.

[0017] Based on the aforementioned technical means, this application can directly determine the thermal management activation temperature threshold corresponding to the current lower limit and the first state of charge in the first preset relationship as the first temperature threshold when the target current is less than the current lower limit corresponding to the first preset relationship. Thus, even if the target current is too small, a relatively accurate reference temperature threshold for thermal management of the power battery in the current state can be determined based on the current lower limit.

[0018] In one possible implementation, determining the first temperature threshold based on the upper limit of current, the first state of charge, and the first preset relationship includes: determining the thermal management activation temperature threshold corresponding to the upper limit of current and the first state of charge in the first preset relationship as the first temperature threshold.

[0019] Based on the aforementioned technical means, this application can directly determine the thermal management activation temperature threshold corresponding to the current upper limit and the first state of charge in the first preset relationship as the first temperature threshold when the target current is greater than the current upper limit corresponding to the first preset relationship. Thus, even if the target current is too large, a relatively accurate reference temperature threshold for thermal management of the power battery in the current state can be determined based on the current upper limit.

[0020] In one possible implementation, determining the first temperature threshold based on the target current, the first state of charge, and the first preset relationship includes: when the first state of charge is greater than the upper limit of the state of charge corresponding to the first preset relationship, determining the thermal management activation temperature threshold corresponding to the target current and the upper limit of the state of charge in the first preset relationship as the first temperature threshold.

[0021] Based on the aforementioned technical means, this application can directly determine the thermal management activation temperature threshold corresponding to the target current and the upper limit of the state of charge in the first preset relationship as the first temperature threshold when the first state of charge is greater than the upper limit of the state of charge corresponding to the first preset relationship. Thus, even if the first state of charge is too large, a relatively accurate reference temperature threshold for thermal management of the power battery in the current state can be determined based on the upper limit of the state of charge.

[0022] According to a second aspect provided in this application, a thermal management control device is provided, comprising: a processing module and an acquisition module; the processing module is configured to determine a target current and a first state of charge of the power battery when charging the power battery, wherein the target current is the average current when the charging pile charges the power battery or the output current of the charging pile; the processing module is further configured to determine a first temperature threshold based on the target current, the first state of charge and a first preset relationship, wherein the first preset relationship is used to indicate the correspondence between multiple currents, multiple states of charge and multiple thermal management activation temperature thresholds; the processing module is further configured to perform thermal management on the charging process of the power battery based on the first temperature threshold.

[0023] In one possible implementation, the acquisition module is used to acquire the average current and the requested current sent by the power battery to the charging pile; the processing module is specifically used to determine the target current as the average current when the difference between the requested current and the average current is greater than a preset threshold; the processing module is specifically used to acquire the output current of the charging pile and determine the target current as the output current when the difference between the requested current and the average current is less than or equal to the preset threshold.

[0024] In one possible implementation, the acquisition module is further configured to acquire the temperature of each of the plurality of battery cells included in the power battery; the processing module is specifically configured to determine that the thermal management of the power battery is to reduce the temperature of the power battery if the temperature of any of the plurality of battery cells is greater than or equal to a first temperature threshold.

[0025] In one possible implementation, the acquisition module is further configured to acquire the second state of charge of the power battery after thermal management; the processing module is further configured to determine a second temperature threshold based on the target current, the second state of charge, and a second preset relationship, wherein the second preset relationship indicates the correspondence between multiple currents, multiple states of charge, and multiple thermal management stop temperature thresholds, and the thermal management start temperature threshold corresponding to the same current and the same state of charge in the first preset relationship is different from the thermal management stop temperature threshold corresponding to the same current and the same state of charge in the second preset relationship; the processing module is further configured to stop thermal management of the power battery when the temperature of the battery cell with the highest temperature among the multiple battery cells is less than or equal to the second temperature threshold.

[0026] In one possible implementation, the processing module is specifically configured to determine a first temperature threshold based on the lower current limit, a first state of charge, and the first preset relationship when the target current is less than the lower current limit corresponding to the first preset relationship; the processing module is specifically configured to determine the first temperature threshold based on the upper current limit, the first state of charge, and the first preset relationship when the target current is greater than the upper current limit corresponding to the first preset relationship.

[0027] In one possible implementation, the processing module is specifically used to determine the thermal management activation temperature threshold corresponding to the lower current limit and the first state of charge in the first preset relationship as the first temperature threshold.

[0028] In one possible implementation, the processing module is specifically used to determine the thermal management activation temperature threshold corresponding to the upper limit of current and the first state of charge in the first preset relationship as the first temperature threshold.

[0029] In one possible implementation, the processing module is specifically used to determine the thermal management activation temperature threshold corresponding to the target current and the upper limit of the state of charge in the first preset relationship as the first temperature threshold when the first state of charge is greater than the upper limit of the state of charge corresponding to the first preset relationship.

[0030] According to a third aspect provided in this application, an electronic device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute instructions to implement the method of the first aspect described above and any possible implementation thereof.

[0031] According to a fourth aspect provided in this application, a computer-readable storage medium is provided that, when the instructions in the computer-readable storage medium are executed by a processor of an electronic device, causes the electronic device to perform the method described in the first aspect and any possible implementation thereof.

[0032] According to the fifth aspect provided in this application, a computer program product is provided, the computer program product including computer instructions, which, when executed on an electronic device, cause the electronic device to perform the method described in the first aspect and any possible implementation thereof.

[0033] According to a sixth aspect provided in this application, a vehicle is provided, the vehicle including a thermal management control device as described in the second aspect, the vehicle being used to implement the method described in the first aspect and any possible implementation thereof.

[0034] According to the seventh aspect provided in this application, a thermal management control system is provided, the thermal management control system including a battery management system and a thermal management system, the thermal management control system being used to implement the first aspect described above and any possible implementation thereof.

[0035] Therefore, the above-mentioned technical features of this application have the following beneficial effects:

[0036] (1) This application allows for the determination of a first temperature threshold based on the average current or output current of the charging pile during power battery charging, combined with the first state of charge of the power battery and a first preset relationship. This first temperature threshold enables thermal management of the power battery charging process. Since the first preset relationship is predetermined, it indicates the correspondence between multiple currents, multiple states of charge, and multiple thermal management activation temperature thresholds. Therefore, given the average current or output current of the charging pile during power battery charging, and the first state of charge of the power battery, the first temperature threshold corresponding to that charging state can be accurately determined based on the first preset relationship. This first temperature threshold, when used for thermal management of the power battery, improves the control effect of thermal management and increases the charging efficiency of the power battery.

[0037] (2) This application can determine the target current as the average current or the output current of the charging pile by determining the relationship between the difference between the average current when the charging pile charges the power battery and the requested current sent by the power battery to the charging pile, and a preset threshold. Thus, under different circumstances, different current parameters can be used to determine the corresponding first temperature threshold. This further improves the accuracy of determining the reference temperature threshold for thermal management of the power battery.

[0038] (3) This application can accurately determine the timing for activating thermal management of the power battery by judging the relationship between the temperature of each of the multiple battery cells in the power battery and a first temperature threshold. Therefore, when the temperature of any of the multiple battery cells is greater than or equal to the first temperature threshold, thermal management is activated to reduce the temperature of the power battery. This further ensures that the power battery temperature does not exceed the threshold during charging and allows for timely cooling of the power battery.

[0039] (4) This application can, after thermal management of the power battery, further determine a second temperature threshold based on the second state of charge, target current, and second preset relationship of the power battery after thermal management. This second temperature threshold is then used to determine whether the temperature of the hottest battery cell among multiple battery cells exceeds the second temperature threshold. Thermal management of the power battery is stopped when the temperature of any battery cell does not exceed the second temperature threshold. Thus, the second temperature threshold used to determine whether to stop thermal management can be re-determined based on the real-time changing state of charge of the power battery and the second preset relationship. This allows for accurate determination of whether to stop thermal management of the power battery based on the relationship between the temperature of the hottest battery cell and the second temperature threshold. This enables timely cessation of thermal management of the power battery when it is not needed, avoiding energy waste.

[0040] (5) This application can determine a corresponding first temperature threshold based on the lower or upper current limit, the first state of charge, and the first preset relationship when the target current exceeds the lower or upper current limit corresponding to the first preset relationship. Thus, even if the target current is too small or too large, the corresponding first temperature threshold can still be determined through the first preset relationship. This further improves the accuracy of determining the reference temperature threshold for thermal management of the power battery.

[0041] (6) This application can directly determine the thermal management activation temperature threshold corresponding to the current lower limit and the first state of charge in the first preset relationship as the first temperature threshold when the target current is less than the current lower limit corresponding to the first preset relationship. In this way, even if the target current is too small, a relatively accurate reference temperature threshold for thermal management of the power battery in the current state can be determined based on the current lower limit.

[0042] (7) This application can directly determine the thermal management activation temperature threshold corresponding to the current upper limit and the first state of charge in the first preset relationship as the first temperature threshold when the target current is greater than the current upper limit corresponding to the first preset relationship. In this way, even if the target current is too large, a relatively accurate reference temperature threshold for thermal management of the power battery in the current state can be determined based on the current upper limit.

[0043] (8) This application can directly determine the thermal management activation temperature threshold corresponding to the target current and the upper limit of the state of charge in the first preset relationship as the first temperature threshold when the first state of charge is greater than the upper limit of the state of charge corresponding to the first preset relationship. In this way, even if the first state of charge is too large, a relatively accurate reference temperature threshold for thermal management of the power battery in the current state can be determined based on the upper limit of the state of charge.

[0044] It should be noted that the technical effects of any of the implementation methods in aspects two through seven can be found in the technical effects of the corresponding implementation methods in aspect one, and will not be repeated here.

[0045] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0046] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application, and do not constitute an undue limitation of this application.

[0047] Figure 1 This is a schematic diagram of the structure of a thermal management control system according to an exemplary embodiment;

[0048] Figure 2 This is a schematic diagram of a structure for cooling a power battery during charging, according to an exemplary embodiment.

[0049] Figure 3 This is a flowchart illustrating a thermal management control method according to an exemplary embodiment;

[0050] Figure 4This is a flowchart illustrating yet another thermal management control method according to an exemplary embodiment;

[0051] Figure 5 This is a flowchart illustrating yet another thermal management control method according to an exemplary embodiment;

[0052] Figure 6 This is a flowchart illustrating yet another thermal management control method according to an exemplary embodiment;

[0053] Figure 7 This is a flowchart illustrating yet another thermal management control method according to an exemplary embodiment;

[0054] Figure 8 This is a block diagram illustrating a thermal management control device according to an exemplary embodiment;

[0055] Figure 9 This is a block diagram illustrating an electronic device according to an exemplary embodiment. Detailed Implementation

[0056] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0057] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0058] The thermal management control method provided in this application embodiment can be applied to thermal management control systems. Figure 1 A schematic diagram of a thermal management control system is shown. Figure 1 As shown, the thermal management control system 10 includes a battery management system 11 and a thermal management system 12.

[0059] The battery management system 11 can determine the target current and the first state of charge of the power battery when charging the power battery. The target current is the average current when the charging pile charges the power battery or the output current of the charging pile.

[0060] The battery management system 11 can also determine a first temperature threshold based on the target current, the first state of charge, and the first preset relationship. The first preset relationship is used to indicate the correspondence between multiple currents, multiple states of charge, and multiple thermal management activation temperature thresholds.

[0061] The battery management system 11 can also perform thermal management of the charging process of the power battery through the thermal management system 12 based on a first temperature threshold.

[0062] In some embodiments, the battery management system 11 can specifically acquire the average current and the requested current sent by the power battery to the charging pile; if the difference between the requested current and the average current is greater than a preset threshold, the target current is determined to be the average current; if the difference between the requested current and the average current is less than or equal to the preset threshold, the output current of the charging pile is acquired, and the target current is determined to be the output current.

[0063] In some embodiments, the battery management system 11 may specifically acquire the temperature of each of the plurality of battery cells included in the power battery; if the temperature of any of the plurality of battery cells is greater than or equal to a first temperature threshold, the thermal management of the power battery is determined to reduce the temperature of the power battery.

[0064] In some embodiments, the battery management system 11 can also acquire the second state of charge of the power battery after thermal management; determine a second temperature threshold based on the target current, the second state of charge, and a second preset relationship, wherein the second preset relationship is used to indicate the correspondence between multiple currents, multiple states of charge, and multiple thermal management stop temperature thresholds, and the thermal management start temperature threshold corresponding to the same current and the same state of charge in the first preset relationship is different from the thermal management stop temperature threshold corresponding to the second preset relationship; if the temperature of the battery cell with the highest temperature among multiple battery cells is less than or equal to the second temperature threshold, thermal management of the power battery through the thermal management system 12 is stopped.

[0065] In some embodiments, the battery management system 11 may determine a first temperature threshold based on the lower current limit, the first state of charge, and the first preset relationship when the target current is less than the lower current limit corresponding to the first preset relationship; and determine the first temperature threshold based on the upper current limit, the first state of charge, and the first preset relationship when the target current is greater than the upper current limit corresponding to the first preset relationship.

[0066] In some embodiments, the battery management system 11 may specifically determine the thermal management activation temperature threshold corresponding to the lower current limit and the first state of charge in the first preset relationship as the first temperature threshold.

[0067] In some embodiments, the battery management system 11 may specifically determine the thermal management activation temperature threshold corresponding to the current upper limit and the first state of charge in the first preset relationship as the first temperature threshold.

[0068] In some embodiments, the battery management system 11 may, when the first state of charge is greater than the upper limit of the state of charge corresponding to the first preset relationship, determine the thermal management activation temperature threshold corresponding to the target current and the upper limit of the state of charge in the first preset relationship as the first temperature threshold.

[0069] In some embodiments, such as Figure 2 The diagram illustrates a structure for cooling a power battery during charging. The power battery includes a cooling assembly with its outlet and inlet connected to a battery cooler. The battery cooler is also connected to an expansion valve, a condenser, and a compressor. Thus, the battery cooler, expansion valve, condenser, and compressor cool the coolant in the pipelines, thereby cooling the coolant in the cooling assembly and reducing the battery temperature during charging. The power battery also includes a charging input interface and a discharging output interface.

[0070] Thus, when a request is received for the Thermal Management System (TMS) to charge and cool the battery, the compressor and water pump can be turned on to cool the battery. If no cooling request is received, the compressor is turned off.

[0071] It should be noted that this application is applicable to both water-cooled and water-heated thermal management components and direct-cooling and direct-heating thermal management components.

[0072] For ease of understanding, the thermal management control method provided in this application will be described in detail below with reference to the accompanying drawings.

[0073] Figure 3 This is a flowchart illustrating a thermal management control method according to an exemplary embodiment, such as... Figure 3 As shown, the method includes the following S301-S303:

[0074] S301. When charging the power battery, determine the target current and the first state of charge of the power battery.

[0075] The target current is the average current when the charging pile charges the power battery or the output current of the charging pile.

[0076] Optionally, to determine whether the power battery is charging, it can first be determined whether a DC or AC charging gun is plugged in. If the power battery is plugged in and the output current of the charging pile or on-board charger is greater than a certain value and remains so for a certain period of time, the power battery is determined to be charging, and the thermal management function needs to be activated. If the power battery is fully charged, abnormally stopped during charging, or not charging, the thermal management function is deactivated, and the corresponding temperature threshold (e.g., the first temperature threshold) is no longer determined.

[0077] It should be noted that after the power battery is plugged into the charging gun, the DC charging pile or AC on-board charger will send a corresponding message. The message includes the output current of the charging pile (e.g., the maximum output current), which can be used to determine the maximum output current of the charging pile. Currently, the output current of DC charging piles can be aA, bA, cA, etc., and the rated power of AC on-board chargers can be 3.3KW, 6.6KW, 11KW, etc.

[0078] Optionally, when charging the power battery via a DC charging pile, the output capacity of the charging pile can be determined based on the message information sent by the charging pile, and the maximum output current of the charging pile can be determined based on the maximum output current value of the charging pile in the CML message sent by the DC charging pile. When charging the power battery via an AC charging pile, the maximum output current value of the AC charger can be comprehensively judged based on factors such as the CC value, CP value, number of AC input phases, charger energy conversion efficiency, and the maximum output current value sent by the on-board charger.

[0079] In some embodiments, such as Figure 4 As shown, in a thermal management control method provided in this application embodiment, the "determining the target current" in S301 above may specifically include S401-S403:

[0080] S401, Obtain the average current and the requested current sent by the power battery to the charging pile.

[0081] Optionally, after the power battery starts charging, the average current for that period of time can be determined based on the charging current of the charging pile during that period.

[0082] Optionally, after the power battery is plugged into the charging gun, the vehicle will communicate with the charging pile to send a request for current to the charging pile and receive the maximum output current sent by the charging pile.

[0083] S402. If the difference between the requested current and the average current is greater than a preset threshold, the target current is determined to be the average current.

[0084] Optionally, during the actual charging process, there may be reasons such as DC charging pile being diverted, charging pile failure, or on-board charger failure, which may cause the actual output current of the charging pile to be inconsistent with the maximum output current sent by the charging pile. Therefore, it is possible to determine whether the charging current is abnormal by judging the relationship between the difference between the requested current and the average current and the preset threshold.

[0085] Therefore, if the absolute value of the difference between the requested current and the average current (the average value of the actual charging current over a certain period of time) is greater than a preset threshold, it can be considered that the output current sent by the charging pile is inaccurate, and the accurate temperature threshold cannot be determined based on the output current of the charging pile. Thus, the accurate temperature threshold can be determined based on the average current.

[0086] It should be noted that determining the average current as the target current to determine the first temperature threshold can be understood as updating the output current of the charging pile to the average current, thereby determining the accurate temperature threshold through the average current.

[0087] S403. If the difference between the requested current and the average current is less than or equal to a preset threshold, obtain the output current of the charging pile and determine the target current as the output current.

[0088] Optionally, when the difference between the requested current and the average current is less than or equal to a preset threshold, the output current sent by the charging pile can be considered accurate, and the accurate temperature threshold can be determined directly through the output current of the charging pile.

[0089] It should be noted that during the charging process, the Battery Management System (BMS) can calculate the average current entering the power battery in real time over a certain period of time. If it is determined that the difference between the actual output current of the charging pile and the average current is greater than the preset threshold and continues for a certain period of time, it will be judged that the output current of the charging pile is inconsistent with the output current included in the message sent by the charging pile, and the accurate temperature threshold needs to be determined by the average current.

[0090] In this embodiment, the target current can be determined as either the average current or the output current of the charging pile by determining the relationship between the difference between the average current when the charging pile charges the power battery and the requested current sent by the power battery to the charging pile, and a preset threshold. Thus, under different circumstances, different current parameters can be used to determine the corresponding first temperature threshold, thereby further improving the accuracy of determining the reference temperature threshold for thermal management of the power battery.

[0091] S302. Determine the first temperature threshold based on the target current, the first state of charge, and the first preset relationship.

[0092] The first preset relationship is used to indicate the correspondence between multiple currents, multiple states of charge, and multiple thermal management activation temperature thresholds.

[0093] Optionally, the first preset relationship can be a linear relationship between current, state of charge and thermal management activation temperature threshold. The first preset relationship can be expressed by a formula algorithm or by a graph.

[0094] Optionally, the thermal management activation temperature threshold corresponding to the current and state of charge indicated by the first preset relationship can be determined by offline simulation and adjusted by real vehicle verification to determine the final first preset relationship.

[0095] Specifically, based on the established thermal-electric coupling model of the power battery, the following parameters can be input for simulation: the charging MAP of the power battery, the initial maximum / minimum temperature of the power battery, the inlet water temperature, the outlet water temperature, the maximum output current of the charging pile, the cooling capacity of the TMS, and the maximum upper limit of the single-cell temperature during charging (e.g., TBD℃). By fixing the state of charge (SOC) of the power battery and setting different battery temperatures, the simulation is started to determine whether the maximum temperature of the power battery during charging is greater than or equal to TBD℃, thereby obtaining the temperature threshold for activating thermal management. A first preset relationship is obtained, written into the BMS software, and real-vehicle calibration tests are performed. After verification on a real vehicle, the final correspondence between the current, state of charge, and thermal management activation temperature threshold is determined.

[0096] Table 1

[0097]

[0098] For example, as shown in Table 1, the correspondence between current, state of charge and thermal management activation temperature threshold (i.e., the first preset relationship) is shown in tabular form.

[0099] It should be noted that, under the same state of charge, the larger the target current, the smaller the corresponding thermal management activation temperature threshold. This is because the larger the target current, the more heat is generated when charging the power battery, and the faster the power battery temperature rises. Therefore, thermal management needs to be activated at a lower temperature to control the power battery temperature within a suitable range, avoiding the charging current from decreasing due to the high power battery temperature during charging, thereby shortening the charging time.

[0100] Optionally, if the target current is within the range of current values ​​shown in Table 1 (e.g., a target current of 200A), the first temperature threshold can be determined using linear interpolation. Similarly, if the first state of charge is within the range of state of charge values ​​shown in Table 1 (e.g., 50%), the first temperature threshold can also be determined using linear interpolation.

[0101] In some embodiments, such as Figure 5 As shown in the embodiment of this application, in a thermal management control method, the above-mentioned S302 may specifically include: S501 or S502.

[0102] S501. When the target current is less than the lower limit of the current corresponding to the first preset relationship, a first temperature threshold is determined based on the lower limit of the current, the first state of charge, and the first preset relationship.

[0103] S502. When the target current is greater than the upper limit of the current corresponding to the first preset relationship, a first temperature threshold is determined based on the upper limit of the current, the first state of charge and the first preset relationship.

[0104] Optionally, the first preset relationship corresponds to a lower current limit and a higher current limit, that is, the first preset relationship can indicate the correspondence between the current range corresponding to the lower current limit and the higher current limit and the state of charge and the thermal management start temperature threshold.

[0105] Therefore, when the target current exceeds the lower or upper current limit, the corresponding first temperature threshold cannot be directly determined through the first preset relationship. Instead, the corresponding first temperature threshold needs to be determined based on the lower or upper current limit.

[0106] In this embodiment, when the target current exceeds the lower or upper current limit corresponding to the first preset relationship, a corresponding first temperature threshold can be determined based on the lower or upper current limit, the first state of charge, and the first preset relationship. Thus, even if the target current is too small or too large, the corresponding first temperature threshold can still be determined through the first preset relationship. This further improves the accuracy of determining the reference temperature threshold for thermal management of the power battery.

[0107] Specifically, based on the lower current limit, the first state of charge, and the first preset relationship, the first temperature threshold is determined, including: determining the thermal management activation temperature threshold corresponding to the lower current limit and the first state of charge in the first preset relationship as the first temperature threshold.

[0108] In this embodiment, when the target current is less than the lower current limit corresponding to the first preset relationship, the thermal management activation temperature threshold corresponding to the lower current limit and the first state of charge in the first preset relationship can be directly determined as the first temperature threshold. Thus, even if the target current is too small, a relatively accurate reference temperature threshold for thermal management of the power battery in the current state can be determined based on the lower current limit.

[0109] Specifically, based on the upper limit of current, the first state of charge, and the first preset relationship, the first temperature threshold is determined, including: determining the thermal management activation temperature threshold corresponding to the upper limit of current and the first state of charge in the first preset relationship as the first temperature threshold.

[0110] In this embodiment, when the target current exceeds the upper limit of the current corresponding to the first preset relationship, the thermal management activation temperature threshold corresponding to the upper limit of the current and the first state of charge in the first preset relationship can be directly determined as the first temperature threshold. Thus, even if the target current is too large, a relatively accurate reference temperature threshold for thermal management of the power battery in the current state can be determined based on the upper limit of the current.

[0111] In some embodiments, in a thermal management control method provided in this application, the above-mentioned S302 may specifically include: when the first state of charge is greater than the upper limit of the state of charge corresponding to the first preset relationship, determining the thermal management activation temperature threshold corresponding to the target current and the upper limit of the state of charge in the first preset relationship as the first temperature threshold.

[0112] Optionally, the first preset relationship also corresponds to an upper limit of the state of charge, that is, the first preset relationship can indicate the correspondence between the current and the thermal management start temperature threshold within the state of charge range corresponding to the upper limit of the state of charge.

[0113] Therefore, when the first state of charge exceeds the upper limit of the state of charge, the corresponding first temperature threshold cannot be directly determined through the first preset relationship. Instead, the corresponding first temperature threshold needs to be determined based on the upper limit of the state of charge.

[0114] In this embodiment, when the first state of charge (SBC) is greater than the upper limit of the SBC corresponding to the first preset relationship, the thermal management activation temperature threshold corresponding to the target current and the upper limit of the SBC in the first preset relationship can be directly determined as the first temperature threshold. Thus, even if the first SBC is too large, a relatively accurate reference temperature threshold for thermal management of the power battery in the current state can be determined based on the upper limit of the SBC.

[0115] S303. Perform thermal management on the charging process of the power battery based on a first temperature threshold.

[0116] In some embodiments, such as Figure 6 As shown, in a thermal management control method provided in this application embodiment, the above-mentioned S303 may specifically include S601-S602:

[0117] S601. Obtain the temperature of each of the multiple battery cells included in the power battery.

[0118] Optionally, during the charging process of the power battery, the temperature of each of the multiple battery cells can be judged in real time to determine the highest temperature among the multiple battery cells.

[0119] S602. When the temperature of any one of the multiple battery cells is greater than or equal to a first temperature threshold, the thermal management of the power battery is determined to be reducing the temperature of the power battery.

[0120] Optionally, when the temperature of any single battery cell is determined to be greater than or equal to a first temperature threshold, the temperature of the power battery can be considered to be out of control, and the power battery needs to be cooled down, thereby activating thermal management to reduce the temperature of the power battery.

[0121] It is understood that if the temperature of any single battery cell is greater than or equal to the first temperature threshold, or if the highest temperature among multiple battery cells is greater than or equal to the first temperature threshold, a power battery cooling request (thermal management activation request) needs to be sent, along with a cooling water temperature request and a cooling flow rate request, to request the TMS to cool the power battery.

[0122] In this embodiment, the application can accurately determine the timing for activating thermal management of the power battery by judging the relationship between the temperature of each of the multiple battery cells in the power battery and a first temperature threshold. Therefore, when the temperature of any of the multiple battery cells is greater than or equal to the first temperature threshold, thermal management is activated to reduce the temperature of the power battery. This further ensures that the power battery temperature does not exceed the threshold during charging, and allows for timely cooling of the power battery.

[0123] In this embodiment, when charging a power battery, a first temperature threshold can be determined based on the average current or output current of the charging pile during charging, combined with the power battery's first state of charge and a first preset relationship. This allows for thermal management of the power battery's charging process based on the first temperature threshold. Since the first preset relationship is predetermined, it indicates the correspondence between multiple currents, multiple states of charge, and multiple thermal management activation temperature thresholds. Therefore, given the average current or output current of the charging pile during charging, and the power battery's first state of charge, the first temperature threshold corresponding to that charging state can be accurately determined based on the first preset relationship. Performing thermal management based on this first temperature threshold improves the control effect of thermal management and increases the charging efficiency of the power battery.

[0124] In some embodiments, such as Figure 7 As shown in the embodiment of this application, a thermal management control method may further include steps S701-S703:

[0125] S701. Obtain the second state of charge of the power battery after thermal management.

[0126] S702. Based on the target current, the second state of charge, and the second preset relationship, determine the second temperature threshold.

[0127] The second preset relationship is used to indicate the correspondence between multiple currents, multiple states of charge, and multiple thermal management stop temperature thresholds. The thermal management start temperature threshold corresponding to the same current and the same state of charge in the first preset relationship is different from the thermal management stop temperature threshold corresponding to the same current and the same state of charge in the second preset relationship.

[0128] Optionally, after enabling thermal management of the power battery, it is also necessary to determine the second temperature threshold corresponding to turning off thermal management in real time based on the second state of charge of the power battery, the target current, and the second preset relationship.

[0129] It can be understood that the thermal management stop temperature threshold indicated by the second preset relationship can be considered as the thermal management start temperature threshold indicated by the first preset relationship minus the preset temperature value T1. As shown in Table 2, the thermal management stop temperature threshold corresponding to the same current and the same state of charge in the second preset relationship differs from the thermal management start temperature threshold corresponding to the first preset relationship by the preset temperature value T1.

[0130] Table 2

[0131]

[0132] Thus, after obtaining the second state of charge of the power battery in real time, a second temperature threshold can be determined based on the target current and the second preset relationship, and the second temperature threshold can be used to determine whether to stop thermal management of the power battery.

[0133] S703. If the temperature of the battery cell with the highest temperature among multiple battery cells is less than or equal to the second temperature threshold, thermal management of the power battery shall be stopped.

[0134] Optionally, the temperature of each of the multiple battery cells can be acquired in real time. When the temperature of the battery cell with the highest temperature is less than or equal to a second temperature threshold, it is considered that there is no need to cool down the power battery, and thermal management of the power battery can be stopped.

[0135] In this embodiment, after thermal management of the power battery, a second temperature threshold is further determined based on the second state of charge, target current, and a second preset relationship of the power battery after thermal management. This second temperature threshold is then used to determine whether the temperature of the hottest battery cell among multiple battery cells exceeds the second temperature threshold. Thermal management of the power battery is stopped when the temperature of any battery cell does not exceed the second temperature threshold. Thus, the second temperature threshold used to determine whether to stop thermal management can be re-determined based on the real-time changing state of charge of the power battery and the second preset relationship. This allows for accurate determination of whether to stop thermal management of the power battery based on the relationship between the temperature of the hottest battery cell and the second temperature threshold. This enables timely cessation of thermal management of the power battery when it is not needed, avoiding energy waste.

[0136] This application's embodiments can, based on the output capacity (output current) of different charging piles and charging conditions under different states of charge, and considering the temperature rise of the power battery and its maximum temperature during charging, save cooling power consumption and reduce charging costs when the charging pile's output capacity is low. Conversely, when the charging pile's capacity is high, it can preemptively control the battery temperature to prevent it from becoming too high, thus shortening the power battery charging time and protecting battery life. It implements the application of corresponding thermal management strategy thresholds and heating / cooling water temperatures at different charging stages, keeping the battery within the temperature range that allows it to be charged with the maximum current under its current state of charge.

[0137] The foregoing mainly describes the solutions provided by the embodiments of this application from a methodological perspective. To achieve the above functions, the thermal management control device or electronic device includes corresponding hardware structures and / or software modules for performing each function. Those skilled in the art should readily recognize that, based on the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0138] This application embodiment can, according to the above method, exemplarily divide a thermal management control device or electronic device into functional modules. For example, the thermal management control device or electronic device may include functional modules corresponding to each functional division, or two or more functions may be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division; in actual implementation, there may be other division methods.

[0139] Figure 8 This is a block diagram illustrating a thermal management control device according to an exemplary embodiment. (Refer to...) Figure 8 The thermal management control device 800 includes a processing module 801 and an acquisition module 802.

[0140] The processing module 801 is used to determine a target current and a first state of charge of the power battery when charging the power battery. The target current is the average current when the charging pile charges the power battery or the output current of the charging pile. The processing module 801 is also used to determine a first temperature threshold based on the target current, the first state of charge and a first preset relationship. The first preset relationship is used to indicate the correspondence between multiple currents, multiple states of charge and multiple thermal management activation temperature thresholds. The processing module 801 is also used to perform thermal management on the charging process of the power battery based on the first temperature threshold.

[0141] In one possible implementation, the acquisition module 802 is used to acquire the average current and the requested current sent by the power battery to the charging pile; the processing module 801 is specifically used to determine the target current as the average current when the difference between the requested current and the average current is greater than a preset threshold; the processing module 801 is specifically used to acquire the output current of the charging pile and determine the target current as the output current when the difference between the requested current and the average current is less than or equal to a preset threshold.

[0142] In one possible implementation, the acquisition module 802 is further configured to acquire the temperature of each of the plurality of battery cells included in the power battery; the processing module 801 is specifically configured to determine that the thermal management of the power battery is to reduce the temperature of the power battery when the temperature of any of the plurality of battery cells is greater than or equal to a first temperature threshold.

[0143] In one possible implementation, the acquisition module 802 is further configured to acquire the second state of charge of the power battery after thermal management; the processing module 801 is further configured to determine a second temperature threshold based on the target current, the second state of charge, and a second preset relationship, wherein the second preset relationship indicates the correspondence between multiple currents, multiple states of charge, and multiple thermal management stop temperature thresholds, and the thermal management start temperature threshold corresponding to the same current and the same state of charge in the first preset relationship is different from the thermal management stop temperature threshold corresponding to the second preset relationship; the processing module 801 is further configured to stop thermal management of the power battery when the temperature of the battery cell with the highest temperature among the multiple battery cells is less than or equal to the second temperature threshold.

[0144] In one possible implementation, the processing module 801 is specifically used to determine a first temperature threshold based on the lower current limit, the first state of charge, and the first preset relationship when the target current is less than the lower current limit corresponding to the first preset relationship; the processing module 801 is specifically used to determine a first temperature threshold based on the upper current limit, the first state of charge, and the first preset relationship when the target current is greater than the upper current limit corresponding to the first preset relationship.

[0145] In one possible implementation, the processing module 801 is specifically used to determine the thermal management activation temperature threshold corresponding to the lower current limit and the first state of charge in the first preset relationship as the first temperature threshold.

[0146] In one possible implementation, the processing module 801 is specifically used to determine the thermal management activation temperature threshold corresponding to the upper limit of current and the first state of charge in the first preset relationship as the first temperature threshold.

[0147] In one possible implementation, the processing module 801 is specifically used to determine the thermal management activation temperature threshold corresponding to the target current and the upper limit of the state of charge in the first preset relationship as the first temperature threshold when the first state of charge is greater than the upper limit of the state of charge corresponding to the first preset relationship.

[0148] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0149] Figure 9 This is a block diagram illustrating an electronic device according to an exemplary embodiment. Figure 9 As shown, the electronic device 900 includes, but is not limited to, a processor 901 and a memory 902.

[0150] The memory 902 described above is used to store the executable instructions of the processor 901. It is understood that the processor 901 is configured to execute instructions to implement the thermal management control method described in the above embodiments.

[0151] It should be noted that those skilled in the art will understand that Figure 9 The electronic device structure shown does not constitute a limitation on the electronic device; the electronic device may include, but is not limited to, other electronic devices. Figure 9 This may indicate more or fewer components, or combinations of certain components, or different component arrangements.

[0152] Processor 901 is the control center of the electronic device. It connects various parts of the electronic device via various interfaces and lines. By running or executing software programs and / or modules stored in memory 902, and by calling data stored in memory 902, it performs various functions and processes data, thereby providing overall monitoring of the electronic device. Processor 901 may include one or more processing units. Optionally, processor 901 may integrate an application processor and a modem processor. The application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into processor 901.

[0153] The memory 902 can be used to store software programs and various data. The memory 902 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, application programs (such as processing modules) required by at least one functional module, etc. Furthermore, the memory 902 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0154] In an exemplary embodiment, a computer-readable storage medium including instructions is also provided, such as a memory 902 including instructions, which can be executed by a processor 901 of an electronic device 900 to implement the thermal management control method in the above embodiments.

[0155] In actual implementation, Figure 8 The functions of the processing module 801 and the acquisition module 802 can be provided by Figure 9 The processor 901 calls the computer program stored in the memory 902 to implement the function. The specific execution process can be found in the description of the thermal management control method section of the previous embodiment, and will not be repeated here.

[0156] Optionally, the computer-readable storage medium may be a non-transitory computer-readable storage medium, such as a read-only memory (ROM), random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device.

[0157] In an exemplary embodiment, this application also provides a computer program product including one or more instructions, which can be executed by the processor 901 of the electronic device 900 to complete the thermal management control method described above.

[0158] It should be noted that when one or more instructions in the computer-readable storage medium or computer program product are executed by the processor of the electronic device, they implement the various processes of the above-described thermal management control method embodiments and achieve the same technical effects as the above-described thermal management control method. To avoid repetition, they will not be described again here.

[0159] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0160] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another apparatus, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0161] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units; that is, it can be located in one place or distributed in multiple different locations. Some or all of the classified units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0162] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0163] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiments of this application, essentially, or the part that contributes to the prior art, or a complete or partial classification of the technical solution, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0164] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A thermal management control method, characterized in that, The method includes: When charging the power battery, a target current and the first state of charge of the power battery are determined. The target current is the average current when the charging pile charges the power battery or the output current of the charging pile. Based on the target current, the first state of charge and the first preset relationship, a first temperature threshold is determined. The first preset relationship is used to indicate the correspondence between multiple currents, multiple states of charge and multiple thermal management activation temperature thresholds. Thermal management of the charging process of the power battery is performed based on the first temperature threshold. The step of determining the first temperature threshold based on the target current, the first state of charge, and the first preset relationship includes: If the target current is less than the lower limit of the current corresponding to the first preset relationship, the first temperature threshold is determined based on the lower limit of the current, the first state of charge, and the first preset relationship. If the target current is greater than the upper limit of the current corresponding to the first preset relationship, the first temperature threshold is determined based on the upper limit of the current, the first state of charge, and the first preset relationship.

2. The method according to claim 1, characterized in that, The determination of the target current includes: The average current and the requested current sent by the power battery to the charging pile are obtained; If the difference between the requested current and the average current is greater than a preset threshold, the target current is determined to be the average current. If the difference between the requested current and the average current is less than or equal to the preset threshold, the output current of the charging pile is obtained, and the target current is determined as the output current.

3. The method according to claim 1, characterized in that, The thermal management of the charging process of the power battery based on the first temperature threshold includes: The temperature of each of the multiple battery cells included in the power battery is obtained; If the temperature of any one of the plurality of battery cells is greater than or equal to the first temperature threshold, the thermal management of the power battery is determined to be to reduce the temperature of the power battery.

4. The method according to any one of claims 1-3, characterized in that, The method further includes: Obtain the second state of charge of the power battery after thermal management is performed on the power battery; Based on the target current, the second state of charge, and the second preset relationship, a second temperature threshold is determined. The second preset relationship is used to indicate the correspondence between multiple currents, multiple states of charge, and multiple thermal management stop temperature thresholds. The thermal management start temperature threshold corresponding to the same current and the same state of charge in the first preset relationship is different from the thermal management stop temperature threshold corresponding to the same current and the same state of charge in the second preset relationship. If the temperature of the battery cell with the highest temperature among the plurality of battery cells is less than or equal to a second temperature threshold, thermal management of the power battery shall be stopped.

5. The method according to claim 1, characterized in that, The step of determining the first temperature threshold based on the lower current limit, the first state of charge, and the first preset relationship includes: The thermal management activation temperature threshold corresponding to the lower current limit and the first state of charge in the first preset relationship is determined as the first temperature threshold.

6. The method according to claim 1, characterized in that, Determining the first temperature threshold based on the upper limit of current, the first state of charge, and the first preset relationship includes: The thermal management activation temperature threshold corresponding to the upper limit of current and the first state of charge in the first preset relationship is determined as the first temperature threshold.

7. The method according to any one of claims 1-3, characterized in that, The step of determining the first temperature threshold based on the target current, the first state of charge, and the first preset relationship includes: If the first state of charge is greater than the upper limit of the state of charge corresponding to the first preset relationship, the thermal management activation temperature threshold corresponding to the target current and the upper limit of the state of charge in the first preset relationship is determined as the first temperature threshold.

8. A thermal management control device, characterized in that, The thermal management control device includes: a processing module; The processing module is used to determine a target current and a first state of charge of the power battery when charging the power battery. The target current is the average current when the charging pile charges the power battery or the output current of the charging pile. The processing module is further configured to determine a first temperature threshold based on the target current, the first state of charge, and the first preset relationship, wherein the first preset relationship is used to indicate the correspondence between multiple currents, multiple states of charge, and multiple thermal management activation temperature thresholds. The processing module is also used to perform thermal management on the charging process of the power battery based on the first temperature threshold. The processing module is specifically used to determine the first temperature threshold based on the lower current limit, the first state of charge, and the first preset relationship when the target current is less than the lower current limit corresponding to the first preset relationship. The processing module is specifically used to determine the first temperature threshold based on the upper limit of the current, the first state of charge, and the first preset relationship when the target current is greater than the upper limit of the current corresponding to the first preset relationship.

9. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute the instructions to implement the method as described in any one of claims 1-7.

10. A vehicle, characterized in that, The vehicle includes the thermal management control device as described in claim 8, and the vehicle is used to implement the method as described in any one of claims 1-7.

11. A thermal management control system, characterized in that, The thermal management control system includes a battery management system and a thermal management system, and the thermal management control system is used to implement the method as described in any one of claims 1-7.

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