Battery thermal management control method, device, equipment and medium

Abstract

The invention relates to a battery thermal management control method, device and equipment and a medium. The method comprises the following steps: acquiring a current working condition, a working state parameter and a cooling liquid temperature parameter of a battery system; obtaining first energy predicted by the battery system according to the working state parameters, and obtaining second energy actually used by the battery system according to the cooling liquid temperature parameters; obtaining target total energy based on the first energy and the second energy; according to the current working condition and the working state parameter, determining a thermal management result of the battery system to be refrigerated or heated; and performing thermal management on the battery system according to the thermal management result and the target total energy. According to the invention, the energy consumption of the thermal management system can be reduced to the greatest extent under the condition that the battery system works at the optimal temperature.

Description

Technical Field

[0001] The present disclosure relates to the field of battery management technology, and in particular to a battery thermal management control method, device, equipment and medium. Background Art

[0002] As battery energy density and charge / discharge rates increase, thermal management system performance is getting bigger and bigger, and the problem that comes with it is that thermal management system energy consumption is also increasing. Existing thermal management systems usually use the battery temperature limit as a judgment signal for starting and stopping the thermal management system, and dynamically adjust the operating status of each component of the system to control the medium temperature at the set value, requiring the thermal management system to have sufficient performance in a short time to meet the battery thermal management requirements.

[0003] Although this method is simple and easy to implement, it is an emergency response and has high requirements on the cooling and heating performance of the thermal management system, and has the disadvantage of high system energy consumption. Summary of the invention

[0004] In order to solve the above technical problems, the present disclosure provides a battery thermal management control method, device, equipment and medium.

[0005] According to one aspect of the present disclosure, a battery thermal management control method is provided, comprising:

[0006] Obtain the current operating conditions, working state parameters and coolant temperature parameters of the battery system;

[0007] Obtaining a first energy predicted to be required by the battery system according to the working state parameter, and obtaining a second energy actually used by the battery system according to the coolant temperature parameter;

[0008] Obtaining a target total energy based on the first energy and the second energy;

[0009] Determining a thermal management result of cooling or heating of the battery system according to the current operating condition and the operating state parameters;

[0010] Thermal management is performed on the battery system according to the thermal management result and the target total energy.

[0011] According to another aspect of the present disclosure, a battery thermal management control device is provided, comprising:

[0012] A parameter acquisition module is used to obtain the current working condition, working state parameters and coolant temperature parameters of the battery system;

[0013] an energy calculation module, configured to obtain a first energy predicted to be required by the battery system according to the working state parameter, and obtain a second energy actually used by the battery system according to the coolant temperature parameter;

[0014] A target total energy obtaining module, configured to obtain a target total energy based on the first energy and the second energy;

[0015] A thermal management result determination module, used to determine the thermal management result of the battery system to be cooled or heated according to the current working condition and working state parameters;

[0016] A thermal management module is used to perform thermal management on the battery system according to the thermal management result and the target total energy.

[0017] According to another aspect of the present disclosure, an electronic device is provided, the electronic device comprising:

[0018] processor;

[0019] a memory for storing instructions executable by the processor;

[0020] The processor is used to read the executable instructions from the memory and execute the instructions to implement the above method.

[0021] According to another aspect of the present disclosure, a computer-readable storage medium is provided, wherein the storage medium stores a computer program, and the computer program is used to execute the above method.

[0022] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0023] The technical solution provided by the embodiment of the present disclosure includes: obtaining the current operating condition, working state parameters and coolant temperature parameters of the battery system; obtaining a first energy predicted to be required by the battery system according to the working state parameters, and obtaining a second energy actually used by the battery system according to the coolant temperature parameters; obtaining a target total energy based on the first energy and the second energy; determining a thermal management result of the battery system to be cooled or heated according to the current operating condition and working state parameters; and performing thermal management on the battery system according to the thermal management result and the target total energy.

[0024] Compared with the existing method of using the battery temperature limit as a judgment signal for starting and stopping the thermal management system, this technical solution can grasp the current working condition, working state parameters and coolant temperature parameters of the battery system, and based on this, respectively use the working state parameters to calculate the predicted first energy and use the coolant temperature parameters to calculate the actual second energy, and by combining the first energy and the second energy, a more accurate calculation of the target total energy required during the operation of the battery system is achieved to avoid energy waste; and, according to the current working condition and working state parameters, the thermal management results of the battery system to be cooled or heated are determined, and then the battery system is thermally managed according to the thermal management results and the target total energy. This embodiment can optimize the thermal management of cooling or heating the battery system, and the temperature management of the battery system based on the target total energy is more accurate and energy-saving, which can ensure that the battery system operates at the optimal temperature while minimizing the energy consumption of the thermal management system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0027] Figure 1 A flow chart of a battery thermal management control method provided by an embodiment of the present disclosure;

[0028] Figure 2 A schematic diagram of an application scenario of the battery thermal management control method provided in an embodiment of the present disclosure;

[0029] Figure 3 A schematic diagram of a battery management cycle provided for an embodiment of the present disclosure;

[0030] Figure 4 A structural block diagram of a battery thermal management control device provided in an embodiment of the present disclosure;

[0031] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0032] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0034] Existing thermal management systems usually use the battery temperature limit as a judgment signal for starting and stopping the thermal management system. Taking the scenario of high temperature in summer and cooling of the thermal management system as an example, when the battery system is running at a high temperature and requires cooling, it means that the temperature of the battery system is close to the maximum temperature of the battery cell, and the temperature rise of the battery system needs to be suppressed as soon as possible, and it is better if it can be reduced. This requires that the rated performance of the thermal management system needs to be large enough to suppress the temperature rise of the battery system or reduce the temperature of the battery system in a short time. At the same time, in order to pursue the maximum cooling capacity, the air-conditioning system must work in a non-economic range, resulting in high energy consumption.

[0035] Based on this, in order to solve the problem of large rated performance and high energy consumption of existing thermal management systems, the embodiments of the present disclosure provide a battery thermal management control method, device, equipment and medium. The technical solution starts from different calculation dimensions and uses different parameters to calculate the first energy and the second energy respectively. The target total energy required by the battery system is obtained through the mutual feedback processing of the first energy and the second energy. Based on the target total energy, the thermal management system optimizes the thermal management of the battery system for cooling or heating, ensuring that the battery system operates at the optimal temperature while minimizing the energy consumption of the thermal management system. For ease of understanding, the embodiments of the present disclosure are described below.

[0036] Figure 1 This is a flow chart of a battery thermal management control method provided by an embodiment of the present disclosure. The method can be applied to battery thermal management scenarios in the fields of energy storage batteries, electric vehicles, etc. The battery thermal management control method can be executed by a battery thermal management control device, which can be implemented in software and / or hardware. Figure 1 As shown, the battery thermal management control method may include the following steps.

[0037] S102, obtaining the current operating condition, operating state parameters and coolant temperature parameters of the battery system.

[0038] Reference Figure 2 As shown, in one application scenario, the battery system is connected to the thermal management system through the system controller. The battery system includes multiple cells. The battery system uses battery energy storage technology and is a large-capacity, high-power energy storage system that can smooth out the peaks and fill the valleys of the power grid. The life and performance of the battery system vary greatly with temperature, so this embodiment requires thermal management of the battery system.

[0039] Generally, the battery system starts running as soon as the power is turned on, and enters the charging, discharging or sleeping state. The system controller is used to collect the current working conditions, working state parameters and coolant temperature parameters required for thermal management during the operation of the battery system; among which, working state parameters include: the real-time temperature of each battery cell, the maximum temperature of the battery cell, the minimum temperature of the battery cell, the temperature threshold for requesting cooling, the temperature threshold for requesting heating, SOC (State of charge), current, power and other parameters indicating the working state of the battery system; coolant temperature parameters include coolant quality and the coolant temperature change value between the water inlet and the water outlet of the battery system.

[0040] In one embodiment, a method of obtaining the current operating condition of the battery system may include: obtaining the current operating condition of the battery system according to a preset battery management cycle; wherein the battery management cycle is used to represent a plurality of operating conditions divided into the battery system based on time periods.

[0041] In practical applications, the battery management cycle of the battery system can be pre-set. A battery management cycle is divided into multiple time periods, each of which includes at least one operating condition, such as standby mode, charging mode, and discharging mode. Based on the set battery management cycle, the operating condition of the battery system is usually stable, regular, and predictable.

[0042] In this embodiment, the system controller can first determine the working plan of the battery system for a certain time period in the future according to the battery management cycle, that is, the working conditions corresponding to each time period, and then transmit the working plan to the thermal management system; or, the battery management cycle is transmitted to the thermal management system through the system controller, and the thermal management system determines the working plan of the battery system for a certain time period in the future according to the battery management cycle.

[0043] Reference Figure 3 , shows an example of a battery management cycle. In this example, the operating conditions of the battery system are usually fixed. Taking a battery system whose operating conditions include two charging modes and two discharging modes as an example, 24 hours a day can be determined as a battery management cycle, and the entire battery management cycle is divided into four time periods. Time period 1 includes two operating conditions: standby mode 1 and discharge mode 1, time period 2 includes two operating conditions: standby mode 2 and charge mode 1, time period 3 includes two operating conditions: standby mode 3 and discharge mode 2, and time period 4 includes two operating conditions: standby mode 4 and charge mode 2.

[0044] The thermal management system determines the current working condition of the battery system, the next working condition, and other working conditions distributed in different time periods according to the preset battery management cycle and the current time. As an example, according to the battery management cycle and the current time, it is determined that the current time period is 1, and accordingly, the current working condition is standby mode 1, and the next working condition is discharge mode 1.

[0045] The system controller transmits the above-mentioned current operating conditions, working status parameters and coolant temperature parameters of the battery system and other parameters used for thermal management to the thermal management system. Based on the above parameters, the thermal management system performs thermal management of cooling or heating the battery system at the optimal energy consumption to achieve the purpose of controlling the temperature of the battery system.

[0046] Compared with the thermal management system in the prior art which can only use the battery temperature limit as a judgment signal for starting and stopping the thermal management system, the thermal management system in this embodiment can obtain multiple parameters such as the current operating condition, working state parameters and coolant temperature parameters of the battery system through the system controller, so that these parameters can be used to optimize the thermal management of cooling or heating the battery system, so that the thermal management system ensures that the battery system operates at the optimal temperature with lower energy consumption.

[0047] S104, obtaining a first energy predicted to be required by the battery system according to the working state parameter, and obtaining a second energy actually used by the battery system according to the coolant temperature parameter.

[0048] Considering that too large or too small cooling / heating capacity will lead to energy waste, it is not possible to ensure that the battery system works at the optimal temperature. To address this problem, this embodiment can calculate the energy required for cooling or heating the battery system.

[0049] In the process of calculating the energy required for cooling or heating the battery system, this embodiment can use different thermal management parameters to calculate the energy required for cooling or heating the battery system respectively, that is: the first energy predicted to be required by the battery system is simulated and calculated according to the working state parameters, and the second energy actually used by the battery system is obtained according to the coolant temperature parameters; and then the target total energy required by the battery system is obtained through mutual feedback processing of the first energy and the second energy. This method can improve the calculation accuracy of the target total energy and realize the cooling and heating management of the battery system in a more efficient and energy-saving manner from the perspective of efficiency.

[0050] Among them, the first energy predicted to be required by the battery system is obtained according to the working state parameters, for example, including: according to the working state parameters such as the real-time temperature of the battery cell, SOC, current, power, the maximum temperature of the battery cell and the minimum temperature of the battery cell, a pre-established thermal simulation model is used to simulate and calculate the first energy absorbed or released by the battery system, the absorbed first energy corresponds to the heating amount under heating management, and the released first energy corresponds to the cooling capacity under cooling management.

[0051] The second energy actually used by the battery system is obtained according to the coolant temperature parameters. One implementation method may include: obtaining the coolant mass included in the coolant temperature parameters and the coolant temperature change value between the water inlet and the water outlet of the battery system; and calculating the second energy actually used by the battery system according to the coolant mass and the coolant temperature change value.

[0052] In a specific example, the coolant temperature at the water inlet and the coolant temperature at the water outlet of the battery system can be detected by the coolant temperature sensors at the water inlet and the water outlet of the battery system, thereby obtaining the coolant temperature change value. The coolant mass of the battery system is calculated based on the water pump speed and the system resistance. Then, according to the formula Q=C*m*ΔT, the energy actually absorbed or lost by the coolant is calculated, and this energy is the measured second energy; the absorbed second energy corresponds to the heating amount under heating management, and the lost second energy corresponds to the cooling capacity under cooling management. In the above formula, Q represents the second energy, m represents the coolant mass, ΔT represents the coolant temperature change value, and C represents the specific heat capacity of the coolant.

[0053] S106, obtaining a target total energy based on the first energy and the second energy.

[0054] It is understandable that there will be a deviation between the first energy of the battery system obtained by simulation and the second energy actually measured. To address this issue, in order to improve the calculation accuracy of the target total energy, this embodiment adopts a combination of simulation and actual measurement to jointly determine the target total energy required during the operation of the battery system based on the first energy and the second energy. The target total energy includes: total heating capacity or total cooling capacity.

[0055] In one implementation, the first energy and the second energy may be compared to see whether they are consistent. If they are consistent, the first energy or the second energy is determined as the target total energy required by the battery system.

[0056] If they are inconsistent, it is further determined whether the change in the real-time temperature of the battery cells of the battery system over time is an increase or decrease within the preset historical time period; wherein the historical time period is a range of time including the current time and the time before it, such as the previous two hours. In the historical time period, the change in the real-time temperature of the battery cells in the battery system over time is used to represent the temperature change trend. If the real-time temperature of the battery cells increases over time, the temperature change trend is an increase; if the real-time temperature of the battery cells decreases over time, the temperature change trend is a decrease.

[0057] If the temperature change trend of the battery system is rising, it means that the battery system requires more energy, so the sum of the first energy and the preset correction energy is determined as the target total energy required by the battery system. Conversely, if the temperature change trend of the battery system is falling, it means that the battery system requires less energy, so the difference between the first energy and the correction energy is determined as the target total energy required by the battery system.

[0058] Based on the first energy obtained by simulation, this embodiment dynamically compares it with the second energy of the actually measured coolant, and further corrects the first energy in combination with the temperature change trend of the battery system over time, thereby improving the calculation accuracy of the target total energy required during the operation of the battery system, which will be more conducive to the precise control of cooling and heating by the thermal management system in the future.

[0059] S108, determining the thermal management result of the battery system to be cooled or heated according to the current working condition and working state parameters.

[0060] The thermal management system controls the temperature of the battery system and generally involves four main temperatures: the minimum cell temperature T min , indicating the ideal minimum temperature of the battery system; the maximum temperature of the battery cell T max , represents the ideal maximum temperature of the battery system; the temperature threshold for requesting cooling is T cool , indicating that when the battery system temperature is high, the temperature at which cooling needs to be requested; the temperature threshold for requesting heating is T hot , which indicates the temperature at which heating needs to be requested when the battery system temperature is low. The above temperatures are arranged from small to large as the temperature thresholds T for requesting heating. hot <Battery cell minimum temperature T min <Temperature threshold T for requesting cooling cool <Maximum cell temperature T max Therefore, this embodiment first obtains the real-time temperature of the battery cell included in the working state parameters, as well as the preset minimum temperature of the battery cell, the temperature threshold for requesting heating, the temperature threshold for requesting cooling, and the maximum temperature of the battery cell.

[0061] It can be understood that the temperature range of the battery system is different under different working conditions such as standby mode, charging mode and discharging mode. Generally speaking, the standby mode corresponds to a lower temperature range, and the charging mode and discharging mode correspond to a higher temperature range. Based on this, this embodiment can combine the temperature comparison result with the working condition, and then compare the real-time temperature of the battery cell with the minimum temperature of the battery cell, the temperature threshold for requesting cooling, the temperature threshold for requesting heating and the maximum temperature of the battery cell to obtain the temperature comparison result; then, according to the current working condition and the temperature comparison result, determine the thermal management result of the battery system to be cooled or heated.

[0062] Exemplarily, the current operating condition is standby mode, and the battery system will be in a lower temperature range. In order to ensure that the battery system can work normally, the lower temperature range is generally not lower than the lowest temperature of the battery cell. Therefore, this embodiment can combine the temperature comparison result between the lowest temperature of the battery cell and the lowest temperature of the battery cell with the operating condition of standby mode to determine the thermal management result of the battery system to be cooled or heated. For example, in standby mode, if the surrounding cold environment causes the real-time temperature of the battery cell to be lower than the lowest temperature of the battery cell, thermal management of the battery system to be heated is required to increase the temperature of the battery system.

[0063] S110, performing thermal management on the battery system according to the thermal management result and the target total energy.

[0064] This embodiment determines whether to perform cooling or heating on the battery system according to the thermal management result, and performs cooling or heating according to the target total energy, thereby achieving thermal management of the battery system.

[0065] In order to better understand the solution, the above embodiments are described in detail below.

[0066] Step 1: Obtain the current working condition of the battery system according to a preset battery management cycle, and obtain the working state parameters and coolant temperature parameters of the battery system.

[0067] Step 2, simulating and calculating the first energy predicted to be required by the battery system according to the working state parameters, and obtaining the second energy actually used by the battery system according to the coolant temperature parameters.

[0068] Step 3: compare the first energy and the second energy to see if they are consistent.

[0069] Step 4: If they are consistent, the first energy or the second energy is determined as the target total energy required by the battery system.

[0070] Step 5, if there is inconsistency, determine whether the change in the real-time temperature of the battery cells of the battery system over time is rising or falling within the preset historical time period; if it is rising, the sum of the first energy and the preset corrected energy is determined as the target total energy required by the battery system; if it is falling, the difference between the first energy and the corrected energy is determined as the target total energy required by the battery system.

[0071] Step 6, obtaining the real-time temperature of the battery cell included in the working status parameters and the preset minimum battery cell temperature, the temperature threshold for requesting heating, the temperature threshold for requesting cooling and the maximum battery cell temperature; comparing the real-time temperature of the battery cell with the minimum battery cell temperature, the temperature threshold for requesting cooling, the temperature threshold for requesting heating and the maximum battery cell temperature, respectively, to obtain a temperature comparison result; determining the thermal management result of the battery system to be cooled or heated according to the current working condition and the temperature comparison result.

[0072] Step 7: Perform thermal management on the battery system according to the thermal management results and the target total energy.

[0073] The following embodiments illustrate the above steps 6 and 7 according to different working conditions and different temperature comparison results.

[0074] In this embodiment, based on the battery management cycle, the operating condition of the battery system is stable, and testing is performed according to the predetermined operating condition to obtain the operating status parameters under the current operating condition. Because there may be mutual influence between the previous and subsequent operating conditions, this embodiment can also obtain the operating status parameters under the next operating condition in advance based on the battery management cycle.

[0075] As an example, in time period 3 of the battery management cycle, the current operating state is the standby mode and the next operating state is the discharge mode.

[0076] In one embodiment, according to the current working condition and the temperature comparison result, determining the thermal management result of the battery system to be cooled or heated includes: when the current working condition is the standby mode, when the temperature comparison result is that the real-time temperature of the battery cell is less than the minimum temperature of the battery cell, determining the thermal management result of the battery system to be heated. In this case, thermal management of the battery system according to the thermal management result and the target total energy may include: using the target total energy as the total heating amount and turning on the heating to control the real-time temperature of the battery cell to be consistent with the minimum temperature of the battery cell in the standby mode.

[0077] Specifically, in the current working condition, that is, in the standby mode, when the temperature comparison result is that the real-time temperature of the battery cell is less than the minimum temperature of the battery cell (T 0 <T min ), the target total energy is used as the total heating amount by the thermal management system and the heating is turned on to control the real-time temperature of the battery cell to be consistent with the lowest temperature of the battery cell during the remaining time (Time5-Time4) of the standby mode; in this embodiment, the real-time temperature of the battery cell and the lowest temperature of the battery cell can be consistent with each other. 0 ≈T min , that is, the two can be close, and the values ​​do not need to be exactly the same.

[0078] As the battery system operates, it changes from the current operating mode to the next operating mode, that is, the discharge mode. When the current operating mode is the discharge mode, if the temperature comparison result shows that the real-time temperature of the battery cell is greater than the temperature threshold (T 0 >T cool), determine the thermal management results of the battery system to be cooled. In this case, thermal management of the battery system according to the thermal management results and the target total energy may include: taking the target total energy as the total cooling capacity and turning on the cooling to control the real-time temperature of the battery cell to be no greater than the maximum temperature of the battery cell during the remaining time in the discharge mode. Specifically, the target total energy is taken as the total cooling capacity and the cooling is turned on through the thermal management system to control the real-time temperature of the battery cell to be no greater than the maximum temperature of the battery cell during the remaining time (Time6-Time5) in the discharge mode. In this embodiment, in the discharge mode, the cooling is turned on through the thermal management system to ensure that the real-time temperature of the battery cell of the battery system is no greater than the maximum temperature of the battery cell (T 0 ≤T max ).

[0079] In another embodiment, according to the current working condition and the temperature comparison result, determining the thermal management result of the battery system to be cooled or heated includes: when the current working condition is the standby mode, when the temperature comparison result is that the real-time temperature of the battery cell is between the minimum temperature of the battery cell and the temperature threshold value (T min <T 0 <T cool ), the third energy predicted to be required by the battery system is obtained according to the preset working state parameters under the next working condition.

[0080] It is determined whether the sum of the first energy and the third energy reaches a preset energy threshold.

[0081] When the sum of the first energy and the third heat reaches the energy threshold, the thermal management result of the battery system to be cooled is determined. In this case, the battery system is thermally managed according to the thermal management result and the target total energy, including: taking the target total energy as the total cooling capacity and turning on the cooling to control the real-time temperature of the battery cell to be consistent with the minimum temperature of the battery cell during the remaining time in the standby mode. Specifically, the thermal management system can take the target total energy as the total cooling capacity and turn on the cooling to control the real-time temperature of the battery cell to be consistent with the minimum temperature of the battery cell during the remaining time in the standby mode (Time5-Time4). 0 ≈T min ).

[0082] And, as the battery system operates, it moves from the current operating state to the next operating state, namely, the discharge mode. In the discharge mode, when the temperature comparison result is that the real-time temperature of the battery cell is greater than the temperature threshold (T 0 >T cool ), determine the thermal management result of the battery system to be cooled. In this case, the target total energy is used as the total cooling capacity through the thermal management system and the cooling is turned on to control the real-time temperature of the battery cell to be no greater than the maximum temperature of the battery cell during the remaining time of the discharge mode.

[0083] In short, the thermal management system of the above embodiment ensures the real-time temperature T of the battery cell of the battery system by heating or cooling. 0 In standby mode, the 0 ≈T min , in discharge mode at T 0 ≤T max .

[0084] This embodiment also includes: when the sum of the first energy and the third energy does not reach the energy threshold, judging whether the average difference in cell temperature between the cells in the battery system is greater than a preset threshold; the average difference in cell temperature can reflect the uniformity of the temperature between the multiple cells in the battery system. If it is greater, the thermal management system connected to the battery system is controlled to enter a self-circulation state; if it is not greater, the thermal management system is controlled to enter a standby state.

[0085] In addition, it can be understood that for other time periods and operating conditions within the battery management cycle, the thermal management system determines the thermal management results of the battery system to be cooled or heated based on the current operating conditions and temperature comparison results, and the manner of thermally managing the battery system according to the thermal management results and the target total energy is basically the same as the above-mentioned example principles, and can be deduced by reference to the aforementioned embodiments, and will not be explained one by one here.

[0086] In this embodiment, in addition to considering the hot and cold control in the charging mode and the discharging mode, the thermal management system also utilizes the time in the standby mode, that is, the same amount of heat or cold is generated for more than twice as long as before. This allows the thermal management system to be smaller, saving parts costs and energy consumption. At the same time, it allows the battery cells of the battery system to work at an ideal temperature for a long time, which can extend the battery life.

[0087] In summary, the battery thermal management control method provided by the embodiment of the present disclosure includes: obtaining the current operating condition, working state parameters and coolant temperature parameters of the battery system; obtaining a first energy predicted to be required by the battery system according to the working state parameters, and obtaining a second energy actually used by the battery system according to the coolant temperature parameters; obtaining a target total energy based on the first energy and the second energy; determining a thermal management result of the battery system to be cooled or heated according to the current operating condition and working state parameters; and thermally managing the battery system according to the thermal management result and the target total energy.

[0088] Compared with the existing method of using the battery temperature limit as a judgment signal for starting and stopping the thermal management system, this technical solution can grasp the current working condition, working state parameters and coolant temperature parameters of the battery system, and based on this, respectively use the working state parameters to calculate the predicted first energy and use the coolant temperature parameters to calculate the actual second energy, and by combining the first energy and the second energy, a more accurate calculation of the target total energy required during the operation of the battery system is achieved to avoid energy waste; and, according to the current working condition and working state parameters, the thermal management results of the battery system to be cooled or heated are determined, and then the battery system is thermally managed according to the thermal management results and the target total energy. This embodiment can optimize the thermal management of cooling or heating the battery system, and the temperature management of the battery system based on the target total energy is more accurate and energy-saving, which can ensure that the battery system operates at the optimal temperature while minimizing the energy consumption of the thermal management system.

[0089] At the same time, based on the battery management cycle, the battery system has a stable working plan in the present and the future, so that the thermal management system can perform active thermal management control on the battery system around the clock and achieve energy saving in the high-efficiency energy-saving range.

[0090] Figure 4 This is a structural block diagram of a battery thermal management control device provided in an embodiment of the present disclosure. The battery thermal management control device can be used to implement the above-mentioned battery thermal management control method. The device can be implemented using software and / or hardware. Figure 4 As shown, the battery thermal management control device may include the following modules.

[0091] The parameter acquisition module 210 is used to obtain the current working condition, working state parameters and coolant temperature parameters of the battery system;

[0092] An energy calculation module 220, configured to obtain a first energy predicted to be required by the battery system according to the working state parameter, and obtain a second energy actually used by the battery system according to the coolant temperature parameter;

[0093] A target total energy obtaining module 230, configured to obtain a target total energy based on the first energy and the second energy;

[0094] A thermal management result determination module 240, configured to determine a thermal management result of the battery system to be cooled or heated according to the current operating condition and operating state parameters;

[0095] The thermal management module 250 is used to perform thermal management on the battery system according to the thermal management result and the target total energy.

[0096] The implementation principle and technical effects of the device provided in this embodiment are the same as those of the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference may be made to the corresponding contents in the aforementioned method embodiment.

[0097] Figure 5 The structure diagram of an electronic device provided by the embodiment of the present disclosure is shown in FIG. Figure 5 As shown, the electronic device 300 includes one or more processors 301 and a memory 302 .

[0098] The processor 301 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 300 to perform desired functions.

[0099] The memory 302 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory (cache), etc. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 301 may run the program instructions to implement the battery thermal management control method of the embodiment of the present disclosure described above and / or other desired functions. Various contents such as input signals, signal components, noise components, etc. may also be stored in the computer-readable storage medium.

[0100] In one example, the electronic device 300 may further include: an input device 303 and an output device 304 , and these components are interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0101] In addition, the input device 303 may also include, for example, a keyboard, a mouse, and the like.

[0102] The output device 304 can output various information to the outside, including the determined distance information, direction information, etc. The output device 304 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and the like.

[0103] Of course, to simplify, Figure 5 Only some of the components related to the present disclosure in the electronic device 300 are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, according to specific application situations, the electronic device 300 may also include any other appropriate components.

[0104] Furthermore, this embodiment also provides a computer-readable storage medium, wherein the storage medium stores a computer program, and the computer program is used to execute the above-mentioned battery thermal management control method.

[0105] A computer program product of a battery thermal management control method, device, electronic device, and medium provided in the embodiments of the present disclosure includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods described in the previous method embodiments. The specific implementation can be found in the method embodiments and will not be repeated here.

[0106] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0107] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery thermal management control method, characterized in that: include: Obtain the current operating conditions, working state parameters and coolant temperature parameters of the battery system; Obtaining a first energy predicted to be required by the battery system according to the working state parameter, and obtaining a second energy actually used by the battery system according to the coolant temperature parameter; Obtaining a target total energy based on the first energy and the second energy; Determining a thermal management result of cooling or heating of the battery system according to the current operating condition and the operating state parameters; Thermal management is performed on the battery system according to the thermal management result and the target total energy.

2. The method according to claim 1, characterized in that The determining, according to the current operating condition and the operating state parameters, a thermal management result of the battery system to be cooled or heated includes: Obtaining the real-time temperature of the battery cell and the preset minimum temperature of the battery cell, the temperature threshold for requesting heating, the temperature threshold for requesting cooling, and the maximum temperature of the battery cell included in the working state parameters; Compare the real-time temperature of the battery cell with the lowest temperature of the battery cell, the temperature threshold for requesting cooling, the temperature threshold for requesting heating, and the highest temperature of the battery cell, respectively, to obtain a temperature comparison result; A thermal management result of the battery system to be cooled or heated is determined according to the current operating condition and the temperature comparison result.

3. The method according to claim 2, characterized in that The determining, according to the current operating condition and the temperature comparison result, a thermal management result of the battery system to be cooled or heated includes: In the case where the current working state is the standby mode, when the temperature comparison result is that the real-time temperature of the battery cell is less than the minimum temperature of the battery cell, determining the thermal management result of the battery system to be heated; The thermal management of the battery system according to the thermal management result and the target total energy includes: The target total energy is used as the total heating amount and heating is turned on to control the real-time temperature of the battery cell to be consistent with the lowest temperature of the battery cell in the standby mode.

4. The method according to claim 2, characterized in that: The determining, according to the current operating condition and the temperature comparison result, a thermal management result of the battery system to be cooled or heated includes: In the case where the current working condition is the standby mode, when the temperature comparison result is that the real-time temperature of the battery cell is between the minimum temperature of the battery cell and the temperature threshold for requesting heating, obtaining the third energy predicted to be required by the battery system according to the preset working state parameters under the next working condition; Determining whether the sum of the first energy and the third energy reaches a preset energy threshold; When the condition is met, determining a thermal management result of the battery system to be cooled; The thermal management of the battery system according to the thermal management result and the target total energy includes: The target total energy is used as the total cooling capacity and cooling is turned on to control the real-time temperature of the battery cell to be consistent with the lowest temperature of the battery cell during the remaining time of the standby mode.

5. The method according to claim 4, characterized in that The method further comprises: When the sum of the first energy and the third energy does not reach the energy threshold, determining whether an average difference in battery cell temperature between battery cells in the battery system is greater than a preset threshold; If it is greater than, controlling the thermal management system connected to the battery system to enter a self-circulation; wherein the thermal management system is used to perform thermal management on the battery system; If it is not greater than, the thermal management system is controlled to enter a standby state.

6. The method according to claim 2, characterized in that The determining, according to the current operating condition and the temperature comparison result, a thermal management result of the battery system to be cooled or heated includes: In the case where the current operating condition is a discharge mode, when the temperature comparison result is that the real-time temperature of the battery cell is greater than the temperature threshold for requesting cooling, determining a thermal management result of the battery system to be cooled; Accordingly, performing thermal management on the battery system according to the thermal management result and the target total energy includes: The target total energy is used as the total cooling capacity and cooling is turned on to control the real-time temperature of the battery cell to be no greater than the maximum temperature of the battery cell during the remaining time of the discharge mode.

7. The method according to claim 1, characterized in that The obtaining of the current operating condition of the battery system includes: The current operating condition of the battery system is obtained according to a preset battery management cycle; wherein the battery management cycle is used to represent a plurality of operating conditions divided for the battery system based on time periods.

8. The method according to claim 1, characterized in that The obtaining a target total energy based on the first energy and the second energy includes: comparing whether the first energy is consistent with the second energy; If they are consistent, determining the first energy or the second energy as the target total energy required by the battery system; If they are inconsistent, determining whether the change in the real-time temperature of the battery cells of the battery system over time is an increase or decrease within a preset historical time period; If it is increasing, determining the sum of the first energy and the preset correction energy as the target total energy required by the battery system; If it is decreasing, the difference between the first energy and the corrected energy is determined as the target total energy required by the battery system.

9. The method according to claim 1, characterized in that: The obtaining, according to the coolant temperature parameter, a second energy actually used by the battery system comprises: Obtaining the coolant mass included in the coolant temperature parameter and the coolant temperature change value between the water inlet and the water outlet of the battery system; The second energy actually used by the battery system is calculated according to the coolant mass and the coolant temperature change value.

10. A battery thermal management control device, characterized in that: include: A parameter acquisition module is used to obtain the current working condition, working state parameters and coolant temperature parameters of the battery system; an energy calculation module, configured to obtain a first energy predicted to be required by the battery system according to the working state parameter, and obtain a second energy actually used by the battery system according to the coolant temperature parameter; A target total energy obtaining module, configured to obtain a target total energy based on the first energy and the second energy; A thermal management result determination module, used to determine the thermal management result of the battery system to be cooled or heated according to the current working condition and working state parameters; A thermal management module is used to perform thermal management on the battery system according to the thermal management result and the target total energy.

11. An electronic device, characterized in that: The electronic device comprises: processor; a memory for storing instructions executable by the processor; The processor is used to read the executable instructions from the memory and execute the instructions to implement the method described in any one of claims 1 to 9.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed on a terminal device, the terminal device implements the method according to any one of claims 1 to 9.

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