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

Abstract

The invention relates to a thermal management control method and device, electronic equipment, a vehicle and a system, and relates to the technical field of thermal management. The technical problem that the control effect on thermal management of the power battery is poor due to the fact that the accuracy of determining the reference temperature threshold value for thermal management of the power battery is low in the related technology is at least solved. Comprising the steps that under the condition that a power battery is charged, target current and the first charge state of the power battery are determined, and the target current is average current when the power battery is charged by a charging pile or output current of the charging pile; based on the target current, the first charge state and a first preset relationship, determining a first temperature threshold, the first preset relationship being used for indicating a corresponding relationship among the plurality of currents, the plurality of charge states and the plurality of thermal management starting temperature thresholds; and performing thermal management on the charging process of the power battery based on the first temperature threshold. The accuracy of determining the reference temperature threshold value for thermal management of the power battery can be improved.

Description

Technical Field

[0001] The present application relates to the field of thermal management technology, and in particular to a thermal management control method, device, electronic equipment, vehicle, and system. Background Art

[0002] With the rapid development of new energy vehicles, power batteries, as a key energy source for these vehicles, require a sound thermal management control strategy to maintain an appropriate operating temperature for the batteries, thereby improving their performance and service life. Currently, the cooling thermal management strategy for power batteries in new energy vehicles is relatively simple during charging. Specifically, the cooling thermal management strategy determines whether to activate based on a set temperature threshold to cool the battery to the threshold. However, due to the varying operating conditions of different vehicles, in some cases, the battery temperature may be too high or too low, resulting in prolonged charging times and poor adaptability. In this case, charging processes with low charging pile output capacity (maximum output current) waste cooling power. However, charging processes with high charging pile output capacity and low battery state of charge (SOC) result in excessive heat generation and rapid temperature rise during charging, accelerating battery aging and shortening its service life.

[0003] In the related art, a preset first temperature threshold and a preset second temperature threshold can be first determined based on the charging power of the charging component and the state of charge of the battery pack, and then the relationship between the current temperature of the battery pack and the preset first temperature threshold and the preset second temperature threshold can be determined to determine whether to turn on the heating component or whether to turn on the cooling component to adjust the temperature of the battery pack to a temperature that matches the charging power. This technical solution only describes how to determine the preset temperature threshold based on relevant parameters to determine whether to adjust the temperature of the battery pack, but does not specifically describe how to determine the preset temperature threshold. In another related art, the charging current limit can be determined based on the first request current sent by the device to be charged, the current state of charge SOC, and the second request current sent by the load device, and further determine whether the charging current limit is within the preset value range to determine the output charging current of the charging pile end. This technical solution discloses how to determine the output charging current of the charging pile end, but does not explain how to perform thermal management during charging. Therefore, currently when charging the power battery, the accuracy of determining the reference temperature threshold for thermal management of the power battery is low, resulting in poor control effect of thermal management of the power battery, low charging efficiency of the power battery, and accelerated aging of the power battery, affecting the service life of the power battery. Summary of the Invention

[0004] The present application provides a thermal management control method, device, electronic device, vehicle and system. The purpose of the present 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 the power battery is low, resulting in poor control effect of the thermal management of the power battery and low charging efficiency of the power battery.

[0005] In order to achieve the above objectives, the technical solutions adopted in this application are as follows:

[0006] According to the first aspect provided by the present application, a thermal management control method is provided, the method comprising: when charging a power battery, determining a target current and a first state of charge of the power battery, the target current being 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, the first preset relationship being used to indicate a correspondence between multiple currents, multiple states of charge and multiple thermal management start-up temperature thresholds; and performing thermal management on the charging process of the power battery based on the first temperature threshold.

[0007] According to the above technical means, the present application can determine the first temperature threshold when charging the power battery based on the average current when the charging pile charges the power battery or the output current of the charging pile, combined with the first state of charge of the power battery and the first preset relationship, so as to perform thermal management on the charging process of the power battery based on the first temperature threshold. In this way, since the first preset relationship is predetermined, it indicates the correspondence between multiple currents, multiple states of charge, and multiple thermal management start-up temperature thresholds. Therefore, when the average current when the charging pile charges the power battery or the output current of the charging pile, as well as the first state of charge of the power battery, is known, the first temperature threshold corresponding to the power battery in this charging state can be accurately determined based on the first preset relationship. Therefore, thermal management of the power battery based on the first temperature threshold can improve the control effect of thermal management and improve the charging efficiency of the power battery.

[0008] In one possible embodiment, the above-mentioned determination of the target current includes: obtaining the average current and the requested current sent by the power battery to the charging pile; when the difference between the requested current and the average current is greater than a preset threshold, determining the target current to be the average current; when the difference between the requested current and the average current is less than or equal to the preset threshold, obtaining the output current of the charging pile, and determining the target current to be the output current.

[0009] Based on the above technical means, the present application can determine the target current as the average current or the output current of the charging pile by determining 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 the preset threshold. In this way, the corresponding first temperature threshold can be determined based on different current parameters in different situations. This further improves the accuracy of determining the reference temperature threshold for thermal management of the power battery.

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

[0011] Based on the above technical means, the present application can accurately determine when to activate thermal management for the power battery by determining the relationship between the temperature of each of the multiple battery cells included 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 does not overheat during charging and promptly cools the power battery.

[0012] In a possible embodiment, the above method also includes: obtaining a second state of charge of the power battery after thermal management of the power battery; determining a second temperature threshold based on the target current, the second state of charge and a second preset relationship, the second preset relationship being 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; 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] According to the above technical means, after thermally managing a power battery, the present application can 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 terminated when the temperature of any battery cell does not exceed the second temperature threshold. In this way, the second temperature threshold used to determine whether to terminate thermal management can be re-determined based on the power battery's real-time state of charge and the second preset relationship. Whether to terminate thermal management of the power battery can be accurately determined based on the relationship between the temperature of the hottest battery cell and the second temperature threshold. Thermal management of the power battery can be terminated promptly when it is no longer needed, avoiding energy waste.

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

[0015] Based on the above technical means, the present application can determine the corresponding first temperature threshold based on the current lower limit or upper limit, the first state of charge, and the first preset relationship when the target current exceeds the current lower limit or upper limit corresponding to the first preset relationship. In this way, even when the target current is too low or too high, the corresponding first temperature threshold can be determined based on the first preset relationship. This further improves the accuracy of determining the reference temperature threshold for thermal management of the power battery.

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

[0017] Based on the above technical means, the present 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 low, a relatively accurate reference temperature threshold for thermal management of the power battery corresponding to the current lower limit can be determined based on the current lower limit.

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

[0019] Based on the above technical means, the present 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 corresponding to the current upper limit can be determined based on the current upper limit.

[0020] In a possible embodiment, the above-mentioned determination of 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 state of charge upper limit corresponding to the first preset relationship, the thermal management startup temperature threshold corresponding to the target current and the state of charge upper limit in the first preset relationship is determined as the first temperature threshold.

[0021] According to the above technical means, when 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 can be directly determined as the first temperature threshold. In this way, even if the first state of charge is too high, a relatively accurate reference temperature threshold for thermal management of the power battery corresponding to the current state can be determined based on the upper limit of the state of charge.

[0022] According to the second aspect provided by the present application, a thermal management control device is provided, which includes: a processing module and an acquisition 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 being the average current when the charging pile charges the power battery or the output current of the charging pile; the processing module 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 being used to indicate a correspondence between multiple currents, multiple states of charge and multiple thermal management start-up 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.

[0023] In one possible embodiment, an acquisition module is used to obtain the average current and the requested current sent by the power battery to the charging pile; the processing module is specifically used to determine that the target current is 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 obtain the output current of the charging pile and determine that the target current is 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 embodiment, the acquisition module is further used to obtain the temperature of each battery cell among the multiple battery cells included in the power battery; the processing module is specifically used to determine that the thermal management of the power battery is to reduce the temperature of the power battery when the temperature of any battery cell among the multiple battery cells is greater than or equal to the first temperature threshold.

[0025] In one possible embodiment, the acquisition module is further used to obtain a second state of charge of the power battery after thermal management is performed on the power battery; the processing module is further used to determine a second temperature threshold based on the target current, the second state of charge, and a second preset relationship, the second preset relationship being used to indicate a 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 is further used 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 embodiment, the processing module is specifically used to determine the first temperature threshold based on the current lower limit, the first state of charge and the first preset relationship when the target current is less than the current lower limit corresponding to the first preset relationship; the processing module is specifically used to determine the first temperature threshold based on the current upper limit, the first state of charge and the first preset relationship when the target current is greater than the current upper limit corresponding to the first preset relationship.

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

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

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

[0030] According to the third aspect provided by the present 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 above-mentioned first aspect and any possible implementation method thereof.

[0031] According to the fourth aspect provided by the present application, a computer-readable storage medium is provided. When the instructions in the computer-readable storage medium are executed by the processor of an electronic device, the electronic device executes the method of the above-mentioned first aspect and any possible implementation method thereof.

[0032] According to the fifth aspect provided by the present application, a computer program product is provided, which includes computer instructions. When the computer instructions are executed on an electronic device, the electronic device executes the method of the above-mentioned first aspect and any possible implementation method thereof.

[0033] According to a sixth aspect provided by the present application, a vehicle is provided, the vehicle including the thermal management control device as in the second aspect, and the vehicle is used to implement the method of the above-mentioned first aspect and any possible implementation manner thereof.

[0034] According to the seventh aspect provided by the present application, a thermal management control system is provided, which includes a battery management system and a thermal management system. The thermal management control system is used to implement the method of the above-mentioned first aspect and any possible implementation method thereof.

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

[0036] (1) The present application can determine a first temperature threshold when charging a power battery based on the average current when the charging pile charges the power battery or the output current of the charging pile, combined with the first state of charge of the power battery and the first preset relationship, thereby performing thermal management on the charging process of the power battery based on the first temperature threshold. In this way, since the first preset relationship is predetermined, it indicates the correspondence between multiple currents, multiple states of charge, and multiple thermal management start-up temperature thresholds. Therefore, when the average current when the charging pile charges the power battery or the output current of the charging pile, as well as the first state of charge of the power battery, is known, the first temperature threshold corresponding to the power battery in the charging state can be accurately determined based on the first preset relationship. Therefore, performing thermal management on the power battery based on the first temperature threshold can improve the control effect of thermal management and improve the charging efficiency of the power battery.

[0037] (2) The present 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 the preset threshold. In this way, under different circumstances, the corresponding first temperature threshold can be determined by different current parameters. This further improves the accuracy of determining the reference temperature threshold for thermal management of the power battery.

[0038] (3) The present application can accurately determine the timing of starting thermal management for the power battery by judging the relationship between the temperature of each of the multiple battery cells included in the power battery and the first temperature threshold. Thus, when the temperature of any of the multiple battery cells is greater than or equal to the first temperature threshold, it is determined that thermal management is started to reduce the temperature of the power battery. In this way, the power battery is further protected from overheating during charging and is cooled in a timely manner.

[0039] (4) After thermal management of the power battery, the present application can further determine a second temperature threshold value based on the second state of charge, target current and second preset relationship of the power battery after thermal management. And judge whether the temperature of the battery cell with the highest temperature among the multiple battery cells exceeds the second temperature threshold value by using the second temperature threshold value, so as to stop thermal management of the power battery when the temperature of any battery cell does not exceed the second temperature threshold value. In this way, the second temperature threshold value for judging 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. Whether to stop thermal management of the power battery can be accurately determined based on the size relationship between the temperature of the battery cell with the highest temperature and the second temperature threshold value. It can stop thermal management of the power battery in a timely manner when thermal management is not needed to avoid energy waste.

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

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

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

[0043] (8) In the present application, when 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 can be directly determined as the first temperature threshold. 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 corresponding to 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 brought about by any implementation method in the second to seventh aspects can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here.

[0045] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

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

[0048] Figure 2 is a schematic diagram showing a structure for cooling a power battery during charging according to an exemplary embodiment;

[0049] Figure 3 is a flow chart showing a thermal management control method according to an exemplary embodiment;

[0050] Figure 4is a flow chart showing another thermal management control method according to an exemplary embodiment;

[0051] Figure 5 is a flow chart showing another thermal management control method according to an exemplary embodiment;

[0052] Figure 6 is a flow chart showing another thermal management control method according to an exemplary embodiment;

[0053] Figure 7 is a flow chart showing another thermal management control method according to an exemplary embodiment;

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

[0055] Figure 9 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0056] In order to enable ordinary people in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0057] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0058] The thermal management control method provided in the embodiments of the present application can be applied to a thermal management control system. Figure 1 Figure 2 shows a schematic diagram of the structure of a thermal management control system. 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 a target current and a first state of charge of the power battery when charging the power battery. The target current is an average current when the charging pile charges the power battery or an output current of the charging pile.

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

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

[0062] In some embodiments, the battery management system 11 can specifically obtain the average current and the requested current sent by the power battery to the charging pile; when 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; when 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 to be the output current.

[0063] In some embodiments, the battery management system 11 can specifically obtain the temperature of each battery cell among the multiple battery cells included in the power battery; when the temperature of any battery cell among the multiple battery cells is greater than or equal to the first temperature threshold, it is determined that the thermal management of the power battery is to reduce the temperature of the power battery.

[0064] In some embodiments, the battery management system 11 can also obtain a second state of charge of the power battery after thermal management of the power battery; determine a second temperature threshold based on the target current, the second state of charge and the second preset relationship, 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; when the temperature of the battery cell with the highest temperature among multiple battery cells is less than or equal to the second temperature threshold, stop thermal management of the power battery through the thermal management system 12.

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

[0069] In some embodiments, as Figure 2 The figure shows a schematic diagram of a structure for cooling a power battery during charging. The power battery includes a cooling assembly, the water outlet and water inlet of which are respectively connected to a battery cooler, which is also connected to an expansion valve, a condenser, and a compressor. In this way, the battery cooler, expansion valve, condenser, and compressor can cool the coolant in the pipeline, thereby cooling the coolant in the cooling assembly through the battery cooler, thereby achieving the effect of lowering the temperature of the power battery during charging. The power battery also includes a charging input interface and a discharging output interface.

[0070] In this way, 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 power battery. If no cooling request is received, the compressor is turned off.

[0071] It should be noted that the present application is applicable to both water-cooling and water-heating 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 is described in detail below with reference to the accompanying drawings.

[0073] Figure 3 FIG. 1 is a flow chart showing a thermal management control method according to an exemplary embodiment. Figure 3 As shown, the method includes the following S301-S303:

[0074] S301 : When charging a power battery, determine a target current and a 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 in a charging state, it is first possible to determine whether a DC charging gun or an AC charging gun is inserted. If it is determined that the power battery is inserted into the charging gun and the output current of the charging pile or the on-board charger is greater than a certain value and lasts for a certain period of time, it is determined that the power battery is in a charging state, and the thermal management function needs to be enabled. If the power battery is in a fully charged state, or in a charging abnormally terminated state, or in an uncharged state, the thermal management function is exited and the temperature threshold corresponding to the thermal management (e.g., the first temperature threshold) is no longer determined.

[0077] It should be noted that when the power battery is inserted into the charging gun, the DC charging pile or AC onboard charger will send a corresponding message, which includes the output current of the charging pile (such as the maximum output current), so that the maximum output current of the charging pile can be determined. The output current of the current DC charging pile can be aA, bA, cA, etc., and the rated power of the AC onboard charger can be 3.3KW, 6.6KW, 11KW, etc.

[0078] Optionally, when charging a power battery via a DC charging pile, the charging pile output capacity 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 a power battery via an AC charging pile, the maximum output current value of the AC charger can be comprehensively determined based on 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, as Figure 4 As shown, in a thermal management control method provided by an embodiment of the present application, the "determining the target current" in the above S301 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 to be charged, the average current corresponding to a certain period of time may be determined according to the current used by the charging pile to charge the power battery within the certain period of time.

[0082] Optionally, after the power battery is inserted into the charging gun, the vehicle will exchange messages with the charging pile, thereby sending a request current to the charging pile and receiving the maximum output current sent by the charging pile.

[0083] S402 : When the difference between the requested current and the average current is greater than a preset threshold, determine the target current as the average current.

[0084] Optionally, during the actual charging process, there are reasons such as the DC charging pile being shunted, the charging pile failing, or the on-board charger failing, 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] In this way, if the difference (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 determined to be 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. Therefore, 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: When 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, it can be considered that the output current sent by the charging pile is accurate, and the accurate temperature threshold can be directly determined by the output current of the charging pile.

[0089] It should be noted that during the charging process, the Battery Management System (BMS) can calculate in real time the average current entering the power battery within 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 lasts 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 through the average current.

[0090] In an embodiment of the present application, the present application can determine the target current as the average current or the output current of the charging pile by determining 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 the preset threshold. In this way, the corresponding first temperature threshold can be determined based on different current parameters in different situations. This further improves the accuracy of determining the reference temperature threshold for thermal management of the power battery.

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

[0092] The first preset relationship is used to indicate a corresponding relationship between multiple currents, multiple states of charge, and multiple thermal management start-up temperature thresholds.

[0093] Optionally, the first preset relationship may be a corresponding linear relationship between current, state of charge, and thermal management start-up temperature threshold. The first preset relationship may be represented by a formula algorithm or in the form of a graph.

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

[0095] Specifically, according to the established power battery thermal-electric coupling model, the power battery charging MAP diagram, 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 TMS cooling capacity, and the upper limit of the maximum temperature of the single cell during the charging process (such as TBD°C) can be input for simulation. By fixing the power battery's state of charge (SOC) and setting different battery temperatures, the simulation is started to determine whether the maximum temperature of the power battery during the charging process is greater than or equal to TBD°C, and then the temperature threshold for starting thermal management is obtained. The first preset relationship is written into the BMS software and a real vehicle calibration test is performed on the real vehicle. After verification on the real vehicle, the final correspondence between the current, state of charge, and the thermal management start-up temperature threshold is determined.

[0096] Table 1

[0097]

[0098] For example, as shown in Table 1, the corresponding relationship between the current, the state of charge and the thermal management activation temperature threshold (ie, the first preset relationship) is shown in the form of a table.

[0099] It should be noted that, at the same state of charge, when the target current is larger, the corresponding thermal management startup temperature threshold is smaller. This is because the larger the target current, the more heat is generated when charging the power battery, and the faster the temperature of the power battery rises. Therefore, it is necessary to turn on thermal management at a lower temperature to control the temperature of the power battery within an appropriate range, avoid the high temperature of the power battery during the charging process, and cause the charging current to decrease, thereby shortening the charging time.

[0100] Alternatively, if the target current is between the current values ​​shown in Table 1 (e.g., the target current is 200 A), the first temperature threshold may be determined by linear interpolation. Similarly, if the first state of charge is between the state of charge values ​​shown in Table 1 (e.g., 50%), the first temperature threshold may also be determined by linear interpolation.

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

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

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

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

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

[0106] In an embodiment of the present application, when the target current exceeds the lower or upper current limit corresponding to the first preset relationship, the 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. This allows the corresponding first temperature threshold to be determined based on the first preset relationship even when the target current is too low or too high. This further improves the accuracy of determining the reference temperature threshold for thermal management of the power battery.

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

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

[0109] Specifically, determining the first temperature threshold based on the current upper limit, the first state of charge and the first preset relationship includes: determining the thermal management start-up temperature threshold corresponding to the current upper limit and the first state of charge in the first preset relationship as the first temperature threshold.

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

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

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

[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 according to the upper limit of the state of charge.

[0114] In an embodiment of the present application, when 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 can be directly determined as the first temperature threshold. In this way, even if the first state of charge is too high, a relatively accurate reference temperature threshold for thermal management of the power battery corresponding to the current state can be determined based on the upper limit of the state of charge.

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

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

[0117] S601: Acquire the temperature of each battery cell among a plurality of battery cells included in a power battery.

[0118] Optionally, during the process of charging the power battery, the temperature of each battery cell among the plurality of battery cells is determined in real time, thereby determining the highest temperature among the plurality of battery cells.

[0119] S602 : When the temperature of any battery cell among the plurality of battery cells is greater than or equal to a first temperature threshold, determine that the thermal management of the power battery is to reduce the temperature of the power battery.

[0120] Optionally, when it is determined that the temperature of any battery cell is greater than or equal to the first temperature threshold, it can be considered that the temperature of the power battery exceeds the limit and the power battery needs to be cooled, so thermal management is activated to reduce the temperature of the power battery.

[0121] It can be understood that if the temperature of any battery cell is greater than or equal to the first temperature threshold, or it can be considered that the highest temperature among multiple battery cells is greater than or equal to the first temperature threshold, it is necessary to send a power battery cooling request (thermal management start request), and send the cooling request water temperature and cooling request flow to request TMS to cool the power battery.

[0122] In an embodiment of the present application, the present application can accurately determine when to activate thermal management for the power battery by determining the relationship between the temperature of each of the multiple battery cells included 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 does not overheat during charging and allows for timely cooling of the power battery.

[0123] In an embodiment of the present application, the present application can determine a first temperature threshold when charging a power battery based on the average current when the charging pile charges the power battery or the output current of the charging pile, combined with the first state of charge of the power battery and the first preset relationship, thereby performing thermal management on the charging process of the power battery based on the first temperature threshold. In this way, 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, when the average current when the charging pile charges the power battery or the output current of the charging pile, as well as the first state of charge of the power battery, are known, the first temperature threshold corresponding to the power battery in this charging state can be accurately determined based on the first preset relationship. Therefore, performing thermal management on the power battery based on the first temperature threshold can improve the control effect of thermal management and improve the charging efficiency of the power battery.

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

[0125] S701: Obtain a second state of charge of the power battery after thermal management is performed on the power battery.

[0126] S702 : Determine a second temperature threshold based on the target current, the second state of charge, and the second preset relationship.

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

[0128] Optionally, after thermal management is enabled for the power battery, a second temperature threshold corresponding to when thermal management is disabled needs to be determined in real time according to the second state of charge, target current, and second preset relationship of the power battery.

[0129] It can be understood that the thermal management deactivation temperature threshold indicated by the second preset relationship can be considered to be the thermal management activation temperature threshold indicated by the first preset relationship minus the preset temperature value T1. As shown in Table 2, the difference between the thermal management deactivation temperature threshold corresponding to the second preset relationship and the thermal management activation temperature threshold corresponding to the first preset relationship for the same current and state of charge is the preset temperature value T1.

[0130] Table 2

[0131]

[0132] In this way, after the second state of charge of the power battery is acquired in real time, the second temperature threshold can be determined according to 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 : When the temperature of the battery cell with the highest temperature among the multiple battery cells is less than or equal to a second temperature threshold, stop thermal management of the power battery.

[0134] Optionally, the temperature of each battery cell in the plurality of battery cells may be acquired in real time, so that 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 the power battery any further, and thermal management of the power battery may be stopped.

[0135] In an embodiment of the present application, after thermally managing the power battery, the present application can 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 highest-temperature battery cell among multiple battery cells exceeds the second temperature threshold. Thermal management of the power battery is terminated when the temperature of any battery cell does not exceed the second temperature threshold. In this way, the second temperature threshold used to determine whether to terminate thermal management can be re-determined based on the real-time state of charge of the power battery and the second preset relationship. Whether to terminate thermal management of the power battery can be accurately determined based on the relative size between the temperature of the highest-temperature battery cell and the second temperature threshold. Thermal management of the power battery can be terminated promptly when it is no longer needed, avoiding energy waste.

[0136] The embodiments of the present application can be based on the output capacity (output current) of different charging piles, the charging conditions under different states of charge, and taking into account the temperature rise of the power battery and the maximum temperature of the power battery during the charging process. When the charging pile output capacity is low, it can save cooling power consumption during the charging process and save charging costs. When the charging pile capacity is high, it can also control the battery temperature in advance to avoid high battery temperature, shorten the power battery charging time, and protect the battery life safety. It realizes the call of the corresponding thermal management strategy threshold and heating and cooling water temperature at different charging stages, so that the battery remains within the temperature range that can be charged with the maximum current at the current state of charge.

[0137] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the method. In order to realize the above functions, the thermal management control device or electronic device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0138] The embodiment of the present application can, according to the above method, exemplarily divide the functional modules of the thermal management control device or electronic device. For example, the thermal management control device or electronic device may include various functional modules corresponding to the various functional divisions, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation.

[0139] Figure 8 FIG. 1 is a block diagram of a thermal management control device according to an exemplary embodiment. 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 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; the processing module 801 is also used to determine the 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 startup temperature thresholds; the processing module 801 is also used to perform thermal management of the charging process of the power battery based on the first temperature threshold.

[0141] In one possible embodiment, the acquisition module 802 is used to obtain 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 that the target current is 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 obtain the output current of the charging pile and determine that the target current is 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 embodiment, the acquisition module 802 is further used to obtain the temperature of each battery cell among the multiple battery cells included in the power battery; the processing module 801 is specifically used to determine that the thermal management of the power battery is to reduce the temperature of the power battery when the temperature of any battery cell among the multiple battery cells is greater than or equal to the first temperature threshold.

[0143] In one possible embodiment, the acquisition module 802 is further used to obtain a second state of charge of the power battery after thermal management is performed on the power battery; the processing module 801 is further used to determine a second temperature threshold based on the target current, the second state of charge, and a second preset relationship, where 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; the processing module 801 is further used 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 embodiment, the processing module 801 is specifically used to determine the first temperature threshold based on the current lower limit, the first state of charge and the first preset relationship when the target current is less than the current lower limit corresponding to the first preset relationship; the processing module 801 is specifically used to determine the first temperature threshold based on the current upper limit, the first state of charge and the first preset relationship when the target current is greater than the current upper limit corresponding to the first preset relationship.

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

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

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

[0148] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0149] Figure 9 FIG. 1 is a block diagram of 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 is configured to store 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 in the above embodiment.

[0151] It should be noted that those skilled in the art can understand that Figure 9 The electronic device structure shown in the figure does not limit the electronic device, and the electronic device may include Figure 9 More or fewer components may be shown, or certain components may be combined, or the components may be arranged differently.

[0152] The processor 901 is the control center of the electronic device. It uses various interfaces and lines to connect the various parts of the entire electronic device. By running or executing software programs and / or modules stored in the memory 902 and calling data stored in the memory 902, it performs various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. The processor 901 may include one or more processing units. Optionally, the processor 901 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the 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 an operating system and application programs required by at least one functional module (such as a processing module). Furthermore, the memory 902 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state memory device.

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

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

[0156] Optionally, the computer-readable storage medium may be a non-temporary computer-readable storage medium, for example, the non-temporary computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0157] In an exemplary embodiment, the present 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 implement the thermal management control method in the above embodiment.

[0158] It should be noted that when the instructions in the above-mentioned computer-readable storage medium or one or more instructions in the computer program product are executed by the processor of the electronic device, the various processes of the above-mentioned thermal management control method embodiment are implemented, and the same technical effect as the above-mentioned thermal management control method can be achieved. To avoid repetition, they will not be repeated here.

[0159] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete the full classification or partial functions described above.

[0160] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0161] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[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 in the form of 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 embodiment of the present application is essentially or the part that contributes to the prior art or the full classification part or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to execute the full classification part or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile 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 comprises: When charging the power battery, determining a target current and a first state of charge of the power battery, wherein the target current is an average current when the charging pile charges the power battery or an 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, the first preset relationship being used to indicate a correspondence between a plurality of currents, a plurality of states of charge, and a plurality of thermal management start-up temperature thresholds; Thermal management is performed on the charging process of the power battery based on the first temperature threshold.

2. The method according to claim 1, characterized in that The determining of the target current comprises: Acquiring the average current and the requested current sent by the power battery to the charging pile; When the difference between the requested current and the average current is greater than a preset threshold, determining the target current to be the average current; When 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 to be 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: Acquiring the temperature of each battery cell among a plurality of battery cells included in the power battery; When the temperature of any battery cell among the plurality of battery cells is greater than or equal to the first temperature threshold, it is determined that the thermal management of the power battery is to reduce the temperature of the power battery.

4. The method according to any one of claims 1 to 3, characterized in that The method further comprises: Acquiring a second state of charge of the power battery after thermal management of the power battery is performed; 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 is used to indicate a correspondence between a plurality of currents, a plurality of states of charge, and a plurality of thermal management stop temperature thresholds, and a thermal management start temperature threshold corresponding to the same current and the same state of charge in the first preset relationship is different from a thermal management stop temperature threshold corresponding to the same current and the same state of charge in the second preset relationship; When 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 is stopped.

5. The method according to any one of claims 1 to 3, characterized in that: The determining a first temperature threshold based on the target current, the first state of charge, and a first preset relationship includes: When the target current is less than a current lower limit corresponding to the first preset relationship, determining the first temperature threshold based on the current lower limit, the first state of charge, and the first preset relationship; When the target current is greater than an upper current limit corresponding to the first preset relationship, the first temperature threshold is determined based on the upper current limit, the first state of charge, and the first preset relationship.

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

7. The method according to claim 5, characterized in that The determining the first temperature threshold based on the current upper limit, the first state of charge, and the first preset relationship includes: A thermal management start-up temperature threshold corresponding to the current upper limit and the first state of charge in the first preset relationship is determined as the first temperature threshold.

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

9. A thermal management control device, characterized in that: The thermal management control device comprises: 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, wherein the target current is an average current when the charging pile charges the power battery or an output current of the charging pile; The processing module is further used 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 a correspondence between multiple currents, multiple states of charge, and multiple thermal management start-up temperature thresholds; The processing module is further used to perform thermal management on the charging process of the power battery based on the first temperature threshold.

10. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the method according to any one of claims 1 to 8.

11. A vehicle, characterized in that: The vehicle comprises the thermal management control device according to claim 9, and the vehicle is used to implement the method according to any one of claims 1-8.

12. A thermal management control system, characterized in that: The thermal management control system comprises a battery management system and a thermal management system, and the thermal management control system is used to implement the method according to any one of claims 1 to 8.

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