Temperature control method and system, control device, vehicle device and storage medium

Abstract

Disclosed in the present application are a temperature control method and system, a control device, a vehicle device and a storage medium. The temperature control method is applied to the temperature control system. The temperature control system comprises an upper-layer water cooling plate corresponding to an upper-layer battery cell of a battery, a lower-layer water cooling plate corresponding to a lower-layer battery cell of the battery, and a valve. The method comprises: determining a first real-time temperature corresponding to an upper-layer battery cell of a battery and a second real-time temperature corresponding to a lower-layer battery cell of the battery; determining a temperature control strategy on the basis of the first real-time temperature and the second real-time temperature; and on the basis of the temperature control strategy, controlling a valve to rotate so as to control the temperature of the upper-layer battery cell of the battery and the temperature of the lower-layer battery cell of the battery.

Description

Temperature control method and system, control device, vehicle equipment and storage medium

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202311212432.4 filed on September 18, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of temperature control technology, and in particular to a temperature control method and system, a control device, a vehicle device, and a storage medium. Background Art

[0004] With the development of pure battery vehicles, people's requirements for the range of pure battery vehicles are getting higher and higher, especially in the field of large pure electric off-road vehicles. Since their driving range of 100 kilometers requires a greater total battery power, when designing batteries, a double-layer battery structure, that is, a double-layer module structure, is generally adopted to ensure that the battery power can easily reach more than 100kWh.

[0005] At present, batteries with a double-layer module structure may have a large temperature difference between the upper and lower cells, making it difficult to meet the design requirements (the temperature difference of all cells is within 5°C), thereby reducing the battery life and the performance of the battery itself.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a temperature control method and system, a control device, a vehicle device, and a storage medium, which can effectively control the temperature of the upper and lower battery cells, thereby improving the service life of the battery and the performance of the battery itself.

[0008] The technical solution of the embodiment of the present application is implemented as follows:

[0009] In a first aspect, an embodiment of the present application provides a temperature control method, which is applied to a temperature control system, wherein the temperature control system includes an upper water-cooling plate corresponding to an upper battery cell, a lower water-cooling plate corresponding to a lower battery cell, and a valve, and the method includes:

[0010] Determining a first real-time temperature corresponding to the upper battery cell of the battery and a second real-time temperature corresponding to the lower battery cell of the battery;

[0011] determining a temperature control strategy according to the first real-time temperature and the second real-time temperature;

[0012] The valve is controlled to rotate according to a temperature control strategy to achieve temperature control of the upper battery cell and the lower battery cell.

[0013] In a second aspect, an embodiment of the present application provides a temperature control system, the temperature control system comprising: a determination unit, a control unit,

[0014] The determining unit is configured to determine a first real-time temperature corresponding to the upper battery cell and a second real-time temperature corresponding to the lower battery cell;

[0015] The determining unit is further configured to determine a temperature control strategy according to the first real-time temperature and the second real-time temperature;

[0016] The control unit is used to control the valve to rotate according to the temperature control strategy to achieve temperature control of the upper battery cell and the lower battery cell.

[0017] In a third aspect, an embodiment of the present application provides a control device, comprising: a processor and a memory; wherein:

[0018] The memory is used to store a computer program that can be run on the processor;

[0019] The processor is configured to execute the method according to the first aspect when running the computer program.

[0020] In a fourth aspect, an embodiment of the present application provides a vehicle device, the vehicle device including a temperature control system, the temperature control system including an upper water-cooling plate corresponding to the upper battery cell, a lower water-cooling plate corresponding to the lower battery cell, and a valve; wherein,

[0021] The temperature control system is used to execute the method according to the first aspect.

[0022] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium on which a program is stored. When the program is executed by a processor, the method described in the first aspect above is implemented.

[0023] The embodiment of the present application provides a temperature control method and system, a control device, a vehicle device and a storage medium. The temperature control method is applied to a temperature control system, the temperature control system includes an upper water-cooling plate corresponding to the upper battery cell of the battery, a lower water-cooling plate corresponding to the lower battery cell of the battery, a valve, and the temperature control system determines a first real-time temperature corresponding to the upper battery cell of the battery and a second real-time temperature corresponding to the lower battery cell of the battery; determines a temperature control strategy based on the first real-time temperature and the second real-time temperature; and controls the valve to rotate according to the temperature control strategy to achieve temperature control of the upper battery cell and the lower battery cell of the battery. It can be seen that in the embodiment of the present application, the real-time temperature of the upper battery cell and the lower battery cell of the battery, i.e., the first real-time temperature and the second real-time temperature, is first determined by the temperature control system, and then the corresponding temperature control strategy can be determined based on the real-time temperature of the upper and lower battery cells, and the valve is controlled to rotate according to the temperature control strategy, thereby achieving temperature control of the upper battery cell and the lower battery cell of the battery, which can solve the problem of large temperature difference between the upper and lower battery cells, thereby improving the service life of the battery and the performance of the battery itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a schematic diagram of the structure of a temperature control system according to an embodiment of the present application;

[0025] FIG2 is a schematic diagram 1 of the flow distribution of the cooling medium controlled by the motor;

[0026] FIG3 is a second schematic diagram of the flow distribution of the cooling medium controlled by the motor;

[0027] FIG4 is a third schematic diagram of the flow distribution of the cooling medium controlled by the motor;

[0028] FIG5 is a schematic diagram of a temperature control method implementation flow chart 1;

[0029] FIG6 is a second schematic diagram of the structure of the temperature control system proposed in an embodiment of the present application;

[0030] FIG7 is a second schematic diagram of a temperature control method implementation flow chart;

[0031] FIG8 is a schematic diagram of an implementation framework of the temperature control method proposed in an embodiment of the present application;

[0032] FIG9 is a schematic diagram of a water inlet proposed in an embodiment of the present application;

[0033] FIG10 is a schematic diagram of a water outlet proposed in an embodiment of the present application;

[0034] FIG11 is a schematic diagram of upper and lower water-cooling plates proposed in an embodiment of the present application;

[0035] FIG12 is a schematic top view of the upper water-cooling plate proposed in an embodiment of the present application;

[0036] FIG13 is a flow distribution diagram 1 proposed in an embodiment of the present application;

[0037] FIG14 is a second flow distribution diagram proposed in an embodiment of the present application;

[0038] FIG15 is a third flow distribution diagram proposed in an embodiment of the present application;

[0039] FIG16 is a third schematic diagram of the structure of the temperature control system proposed in an embodiment of the present application;

[0040] FIG17 is a schematic diagram of the composition structure of the control device proposed in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. It should be understood that the specific embodiments described herein are only used to explain the related applications and are not intended to limit the applications. It should also be noted that for ease of description, only the portions relevant to the related applications are shown in the drawings.

[0042] Temperature control systems are widely used in the automotive, medical, and industrial fields. The working principle of the temperature control system is based on the idea of ​​feedback control. The system continuously measures the gap between the actual temperature and the set value, and compares it with the operating standard to determine the next operation. Generally, after the BMS (Battery Management System) determines the first real-time temperature corresponding to the upper battery cell and the second real-time temperature corresponding to the lower battery cell, it determines the temperature control strategy based on the first real-time temperature and the second real-time temperature; the valve is controlled to rotate according to the temperature control strategy to achieve temperature control of the upper battery cell and the lower battery cell, thereby solving the problem of large temperature difference between the upper battery cell and the lower battery cell, thereby improving the battery life and the performance of the battery itself. The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0043] An embodiment of the present application provides a temperature control method, which can be applied to a temperature control system, wherein the temperature control system includes an upper water-cooling plate corresponding to the upper battery cell, a lower water-cooling plate corresponding to the lower battery cell, and a valve.

[0044] It should be noted that, in the embodiments of the present application, the temperature control system may be any form of equipment or device. For example, the temperature control system may be a BMS, which is not specifically limited in the present application.

[0045] Exemplarily, in some embodiments, Figure 1 is a schematic diagram of the composition structure of the temperature control system proposed in an embodiment of the present application. As shown in Figure 1, the temperature control system can be composed of an upper water-cooling plate corresponding to the upper battery cell, a lower water-cooling plate corresponding to the lower battery cell, and a valve.

[0046] It should be noted that in the embodiments of the present application, the upper water-cooling plate connected to the upper battery cells is filled with coolant, and a valve at the water inlet controls the distribution of coolant to achieve temperature control of the upper battery cells. Similarly, the lower water-cooling plate connected to the lower battery cells is filled with coolant, and a valve at the water inlet controls the distribution of coolant to achieve temperature control of the lower battery cells. The valve includes fan blades connected to an electric motor, which controls the rotation of the fan blades, thereby controlling the flow distribution of the upper and lower cooling media.

[0047] For example, in an embodiment of the present application, Figure 2 is a schematic diagram of the flow distribution of the cooling medium controlled by the motor. As shown in Figure 2, the fan blades can be controlled to rotate, thereby affecting the flow distribution of the cooling medium at the water inlet. In the normal state, the fan blades are in a horizontal position, and the liquid cooling medium is evenly distributed to the water inlet of the upper and lower water cooling plates.

[0048] In an embodiment of the present application, Figure 3 is a second schematic diagram of the flow distribution of the cooling medium controlled by the motor. As shown in Figure 3, when the temperature of the upper battery cell is greater than the temperature of the lower battery cell, the fan blades can be controlled to rotate clockwise, so that the flow of the cooling medium of the upper water-cooled plate increases and the flow of the cooling medium of the lower water-cooled plate decreases, thereby achieving cooling of the upper battery cell.

[0049] In an embodiment of the present application, Figure 4 is a third schematic diagram of the flow distribution of the cooling medium controlled by the motor. As shown in Figure 4, when the temperature of the lower battery cell is greater than the temperature of the upper battery cell, the fan blades can be controlled to rotate counterclockwise, so that the flow of the cooling medium of the lower water-cooled plate increases and the flow of the cooling medium of the upper water-cooled plate decreases, thereby achieving cooling of the lower battery cell.

[0050] In an embodiment of the present application, FIG5 is a schematic diagram of a first flow chart of a temperature control method. As shown in FIG5 , the temperature control method of the temperature control system may include the following steps:

[0051] Step 101: Determine a first real-time temperature corresponding to an upper battery cell and a second real-time temperature corresponding to a lower battery cell.

[0052] In an embodiment of the present application, temperature sensors are configured in the upper battery cells and the lower battery cells. Any number of temperature sensors can be configured at any position of the upper battery cells and the lower battery cells. The temperature sensors are used for real-time temperature collection.

[0053] In an embodiment of the present application, the temperature control system may first obtain a first real-time temperature corresponding to the upper battery cell and a second real-time temperature corresponding to the lower battery cell through a temperature sensor.

[0054] Step 102: Determine a temperature control strategy according to the first real-time temperature and the second real-time temperature.

[0055] In an embodiment of the present application, after determining the first real-time temperature corresponding to the upper battery cell and the second real-time temperature corresponding to the lower battery cell, the temperature control system can determine a temperature control strategy based on the first real-time temperature and the second real-time temperature.

[0056] In an embodiment of the present application, the first temperature information corresponding to the upper battery cell of the battery is determined by the first real-time temperature corresponding to the upper battery cell of the battery. The first temperature information can be the average temperature of the entire upper battery cell of the battery, or the maximum value, minimum value or intermediate value of the temperature of the upper battery cell of the battery, etc., which is not specifically limited in the embodiment of the present application.

[0057] In an embodiment of the present application, the second temperature information corresponding to the lower battery cell of the battery is determined by the second real-time temperature corresponding to the lower battery cell of the battery. The second temperature information can be the average temperature of the entire lower battery cell of the battery, or the maximum value, minimum value or intermediate value of the temperature of the lower battery cell of the battery, etc., which is not specifically limited in the embodiment of the present application.

[0058] In an embodiment of the present application, when the temperature control system reads the first real-time temperature corresponding to the upper battery cell and the second real-time temperature corresponding to the lower battery cell through the temperature sensor, the temperature sensor can read the temperatures of multiple different positions of the upper battery cell or the lower battery cell, and can also read the temperature of one point of the upper battery cell or the lower battery cell. This embodiment of the present application does not make specific limitations.

[0059] In an embodiment of the present application, when determining the temperature control strategy, when the difference between the first temperature information and the second temperature information is greater than the preset temperature difference threshold, the temperature control strategy is determined to be that the cooling amplitude of the upper battery cell is greater than the cooling amplitude of the lower battery cell.

[0060] It should be noted that, in an embodiment of the present application, when the difference between the first temperature information and the second temperature information is greater than the preset temperature difference threshold, it is considered that the difference between the first temperature information and the second temperature information exceeds expectations, so it is necessary to increase the cooling amplitude of the upper battery cells and reduce the cooling amplitude of the lower battery cells, so that the temperature difference between the upper battery cell temperature and the lower battery cell temperature is maintained within the preset temperature difference threshold. Therefore, when the difference between the first temperature information and the second temperature information is greater than the preset temperature difference threshold, the temperature control strategy is that the cooling amplitude of the upper battery cells is greater than the cooling amplitude of the lower battery cells.

[0061] In an embodiment of the present application, when determining the temperature control strategy, when the difference between the second temperature information and the first temperature information is greater than the preset temperature difference threshold, the temperature control strategy is determined to be that the cooling amplitude of the lower battery cells is greater than the cooling amplitude of the upper battery cells.

[0062] It should be noted that, in an embodiment of the present application, when the difference between the second temperature information and the first temperature information is greater than the preset temperature difference threshold, it is considered that the difference between the second temperature information and the first temperature information exceeds expectations, so it is necessary to increase the cooling amplitude of the lower battery cells and reduce the cooling amplitude of the upper battery cells, so that the temperature difference between the upper battery cell temperature and the lower battery cell temperature is maintained within the preset temperature difference threshold. Therefore, when the difference between the first temperature information and the second temperature information is greater than the preset temperature difference threshold, the temperature control strategy is that the cooling amplitude of the lower battery cells is greater than the cooling amplitude of the upper battery cells.

[0063] In an embodiment of the present application, when determining the temperature control strategy, when the absolute value of the difference between the first temperature information and the second temperature information is less than or equal to the preset temperature difference threshold, the temperature control strategy is determined to be that the cooling amplitude of the upper battery cell is equal to the cooling amplitude of the lower battery cell.

[0064] It should be noted that, in an embodiment of the present application, when the difference between the first temperature information and the second temperature information is equal to the preset temperature difference threshold, it is considered that the difference between the first temperature information and the second temperature information meets the set requirements, so the cooling amplitude of the lower battery cell is equal to the cooling amplitude of the upper battery cell, so that the temperature difference between the upper battery cell temperature and the lower battery cell temperature is maintained within the preset temperature difference threshold. Therefore, the temperature control strategy when the difference between the first temperature information and the second temperature information is equal to the preset temperature difference threshold is that the cooling amplitude of the upper battery cell is equal to the cooling amplitude of the lower battery cell.

[0065] It should be noted that, in the embodiments of the present application, the preset temperature difference threshold value can be any integer value, and the embodiments of the present application do not specifically limit it.

[0066] For example, in some embodiments, the preset temperature difference threshold can be a value greater than or equal to -4 and less than 5 (industrial design requires that the battery cell temperature difference is within 5°C). For example, the preset threshold can be 0°C or 4°C, which is not specifically limited in the embodiments of the present application.

[0067] In an embodiment of the present application, the temperature control system obtains a temperature control strategy by subtracting the first real-time temperature corresponding to the upper battery cell and the second real-time temperature corresponding to the lower battery cell. The temperature control strategy includes three types: the cooling amplitude of the upper battery cell is greater than the cooling amplitude of the lower battery cell, the cooling amplitude of the lower battery cell is greater than the cooling amplitude of the upper battery cell, and the cooling amplitude of the upper battery cell is equal to the cooling amplitude of the lower battery cell.

[0068] It can be seen that in the embodiment of the present application, after the temperature control system collects the first real-time temperature corresponding to the upper battery cell and the second real-time temperature corresponding to the lower battery cell through the temperature sensor, it first determines the first temperature information corresponding to the upper battery cell and the second temperature information corresponding to the lower battery cell, and then performs a difference operation on the first temperature information and the second temperature information to determine the difference result between the first temperature information and the second temperature information. If the difference result is that the first temperature information is greater than the second temperature information, it can be considered that the temperature of the upper battery cell is higher than the temperature of the lower battery cell, and the difference between the temperature of the upper battery cell and the temperature of the lower battery cell exceeds the preset temperature difference threshold range, then the temperature control strategy is determined to be the cooling amplitude of the upper battery cell. the temperature of the lower battery cell is greater than the temperature reduction amplitude of the lower battery cell; if the difference result is that the second temperature information is greater than the first temperature information, it can be considered that the temperature of the lower battery cell is higher than the temperature of the upper battery cell, and the difference between the temperature of the lower battery cell and the temperature of the upper battery cell exceeds the preset temperature difference threshold range, then the temperature control strategy is determined to be that the temperature reduction amplitude of the lower battery cell is greater than the temperature reduction amplitude of the upper battery cell; if the difference result is that the first temperature information is equal to the second temperature information, it can be considered that the temperature of the upper battery cell is equal to the temperature of the lower battery cell, and the difference between the temperature of the upper battery cell and the temperature of the lower battery cell is within the preset temperature difference threshold range, then the temperature control strategy is determined to be that the temperature reduction amplitude of the upper battery cell is equal to the temperature reduction amplitude of the lower battery cell.

[0069] Step 103: Control the valve to rotate according to the temperature control strategy to achieve temperature control of the upper battery cell and the lower battery cell.

[0070] In an embodiment of the present application, after determining the temperature control strategy based on the first real-time temperature and the second real-time temperature, the temperature control system controls the valve to rotate according to the temperature control strategy, thereby achieving temperature control of the upper battery cells and the lower battery cells.

[0071] In an embodiment of the present application, the temperature control system further includes a motor, and the valve includes blades. The motor controls the rotation of the blades, thereby controlling the flow distribution of the cooling medium between the upper and lower layers. After determining a temperature control strategy based on the first and second real-time temperatures, the temperature control system can issue control instructions to the motor based on the different temperature control strategies, thereby causing the motor to control the rotation of the blades in the valve.

[0072] In an embodiment of the present application, Figure 6 is a second schematic diagram of the composition structure of the temperature control system proposed in an embodiment of the present application. As shown in Figure 6, the temperature control system consists of an upper water-cooling plate corresponding to the upper battery cell, a lower water-cooling plate corresponding to the lower battery cell, and a valve. The valve includes fan blades, and the valve is connected to the motor.

[0073] In an embodiment of the present application, when the valve is controlled to rotate according to the temperature control strategy, when the temperature control strategy is that the cooling amplitude of the upper battery cells is greater than the cooling amplitude of the lower battery cells, the fan blades are controlled by the motor to operate in the first rotation mode.

[0074] In an embodiment of the present application, the first rotation mode is used to control a first flow rate corresponding to the upper water-cooling plate to be greater than a second flow rate corresponding to the lower water-cooling plate.

[0075] It should be noted that in the embodiments of the present application, the first rotation mode can be any rotation form. For example, the first rotation mode can be used to determine the rotation direction of the fan blades, or to determine the rotation speed of the fan blades, etc. The embodiments of the present application do not make specific limitations.

[0076] For example, in some embodiments, the first rotation mode may be that the fan blades rotate 30°, or 45°, or the fan blades rotate at a speed of 8 revs / second or 10 revs / second, which is not specifically limited in the embodiments of the present application.

[0077] In an embodiment of the present application, if the temperature control strategy is that the cooling amplitude of the upper battery cells is greater than the cooling amplitude of the lower battery cells, the fan blades are controlled to rotate so that the first flow corresponding to the upper water-cooling plate is greater than the second flow corresponding to the lower water-cooling plate, that is, the first rotation mode is adopted.

[0078] It should be noted that in an embodiment of the present application, when controlling the rotation of the fan blades, a control instruction is given to the motor, and the rotation of the fan blades is controlled by the motor. The temperature control system determines the rotation parameters corresponding to the fan blades based on the absolute value of the difference between the first temperature information and the second temperature information, and the motor controls the fan blades to rotate based on the rotation parameters.

[0079] In an embodiment of the present application, when the absolute value of the difference between the first temperature information and the second temperature information exceeds a preset temperature difference threshold, the rotation parameter corresponding to the fan blade can be determined according to the absolute value of the difference, so that the motor controls the fan blade to rotate based on the rotation parameter.

[0080] It should be noted that, in the embodiments of the present application, the rotation parameters may include any rotation speed, such as angular velocity, rotational speed, etc., which is not specifically limited in the embodiments of the present application.

[0081] It should be noted that in an embodiment of the present application, if the temperature control strategy is that the cooling amplitude of the upper battery cells is greater than the cooling amplitude of the lower battery cells, and the temperature control strategy before this is also that the cooling amplitude of the upper battery cells is greater than the cooling amplitude of the lower battery cells, that is, the motor controls the fan blades to rotate based on the previous first rotation mode, that is, the first flow rate corresponding to the upper water-cooling plate is kept greater than the second flow rate corresponding to the lower water-cooling plate, so that the cooling amplitude of the upper battery cells is greater than the cooling amplitude of the lower battery cells.

[0082] In an embodiment of the present application, when the valve is controlled to rotate according to the temperature control strategy, when the temperature control strategy is that the cooling amplitude of the lower battery cells is greater than the cooling amplitude of the upper battery cells, the fan blades are controlled by the motor to operate in the second rotation mode.

[0083] In an embodiment of the present application, the second rotation mode is used to control the second flow rate corresponding to the lower water-cooling plate to be greater than the first flow rate corresponding to the upper water-cooling plate.

[0084] It should be noted that in the embodiments of the present application, the second rotation mode can be any rotation form. For example, the second rotation mode can be used to determine the rotation direction of the fan blades, or to determine the rotation speed of the fan blades, etc. The embodiments of the present application do not make specific limitations.

[0085] For example, in some embodiments, the second rotation mode may be that the fan blades rotate 30°, or 45°, or the fan blades rotate at a speed of 8 revs / second or 10 revs / second, which is not specifically limited in the embodiments of the present application.

[0086] In an embodiment of the present application, if the temperature control strategy is that the cooling amplitude of the lower battery cells is greater than the cooling amplitude of the upper battery cells, the fan blades are controlled to rotate so that the second flow corresponding to the lower water-cooling plate is greater than the first flow corresponding to the upper water-cooling plate, that is, the second rotation mode is adopted.

[0087] It should be noted that in an embodiment of the present application, when controlling the rotation of the fan blades, a control instruction is given to the motor, and the rotation of the fan blades is controlled by the motor. The temperature control system determines the rotation parameters corresponding to the fan blades based on the absolute value of the difference between the first temperature information and the second temperature information, and the motor controls the fan blades to rotate based on the rotation parameters.

[0088] In an embodiment of the present application, when the absolute value of the difference between the first temperature information and the second temperature information exceeds a preset temperature difference threshold, the rotation parameter corresponding to the fan blade can be determined according to the absolute value of the difference, so that the motor controls the fan blade to rotate based on the rotation parameter.

[0089] It should be noted that, in the embodiments of the present application, the rotation parameters may include any rotation speed, such as angular velocity, rotational speed, etc., which is not specifically limited in the embodiments of the present application.

[0090] It should be noted that in an embodiment of the present application, if the temperature control strategy is that the cooling amplitude of the lower battery cells is greater than the cooling amplitude of the upper battery cells, and the temperature control strategy before this is also that the cooling amplitude of the lower battery cells is greater than the cooling amplitude of the upper battery cells, that is, the motor controls the fan blades to rotate based on the previous second rotation mode, that is, the second flow rate corresponding to the lower water-cooling plate is kept greater than the first flow rate corresponding to the upper water-cooling plate, so that the cooling amplitude of the lower battery cells is greater than the cooling amplitude of the upper battery cells.

[0091] In an embodiment of the present application, when the valve is controlled to rotate according to the temperature control strategy, when the temperature control strategy is that the cooling amplitude of the upper battery cells is equal to the cooling amplitude of the lower battery cells, the fan blades are controlled by the motor to operate in the third rotation mode.

[0092] In an embodiment of the present application, the third rotation mode is used to control the first flow corresponding to the upper water-cooling plate to be equal to the second flow corresponding to the lower water-cooling plate.

[0093] It should be noted that in the embodiments of the present application, the third rotation mode can be any rotation form. For example, the third rotation mode can be used to determine the rotation direction of the fan blades, or to determine the rotation speed of the fan blades, etc. The embodiments of the present application do not make specific limitations.

[0094] For example, in some embodiments, the third rotation mode may be for the fan blades to maintain a horizontal position, or to rotate at a constant speed, which is not specifically limited in the embodiments of the present application.

[0095] In an embodiment of the present application, if the temperature control strategy is that the cooling amplitude of the upper battery cells is equal to the cooling amplitude of the lower battery cells, the fan blades are controlled to rotate so that the first flow corresponding to the upper water-cooling plate is equal to the second flow corresponding to the lower water-cooling plate, that is, the third rotation mode is adopted.

[0096] It should be noted that in an embodiment of the present application, when controlling the rotation of the fan blades, a control instruction is given to the motor, and the rotation of the fan blades is controlled by the motor. The temperature control system determines the rotation parameters corresponding to the fan blades based on the absolute value of the difference between the first temperature information and the second temperature information, and the motor controls the fan blades to rotate based on the rotation parameters.

[0097] In an embodiment of the present application, when the absolute value of the difference between the first temperature information and the second temperature information exceeds a preset temperature difference threshold, the rotation parameter corresponding to the fan blade can be determined according to the absolute value of the difference, so that the motor controls the fan blade to rotate based on the rotation parameter.

[0098] It should be noted that, in the embodiments of the present application, the rotation parameters may include any rotation speed, such as angular velocity, rotational speed, etc., which is not specifically limited in the embodiments of the present application.

[0099] It should be noted that, in an embodiment of the present application, if the temperature control strategy is that the cooling amplitude of the upper battery cell is equal to the cooling amplitude of the lower battery cell, and the temperature control strategy before that is also that the cooling amplitude of the upper battery cell is equal to the cooling amplitude of the lower battery cell, that is, the motor controls the fan blades to rotate based on the previous third rotation mode, that is, the first flow rate corresponding to the upper water-cooling plate is kept equal to the second flow rate corresponding to the lower water-cooling plate, so that the cooling amplitude of the upper battery cell is equal to the cooling amplitude of the lower battery cell.

[0100] For example, in some embodiments, when the absolute value of the difference is large, the rotation parameter is also large, and when the absolute value of the difference is small, the rotation parameter will also become smaller. For example, when the absolute value of the difference is 5, the rotation parameter is that the fan blades rotate at a speed of 8 revolutions / second, or the fan blades rotate 60°, etc. When the absolute value of the difference is 1, the rotation parameter is that the fan blades rotate at a speed of 4 revolutions / second, or the fan blades rotate 30°, etc. The embodiments of this application do not make specific limitations.

[0101] In an embodiment of the present application, when the absolute value of the difference between the first temperature information and the second temperature information is greater than a preset temperature difference threshold, different rotation parameters corresponding to the fan blades are determined according to different absolute values ​​of the difference, so that the motor controls the fan blades to rotate based on different rotation parameters.

[0102] It can be seen that in the embodiment of the present application, the temperature control system collects the first real-time temperature corresponding to the upper battery cell and the second real-time temperature corresponding to the lower battery cell through the temperature sensor, and determines the temperature control strategy according to the first real-time temperature and the second real-time temperature. The temperature control system controls the valve to rotate in different modes according to different temperature control strategies. If the temperature control strategy is that the cooling amplitude of the upper battery cell is greater than the cooling amplitude of the lower battery cell, the temperature control system gives a control instruction to the valve according to the temperature control strategy. The valve includes fan blades, which are controlled by an electric motor to work in a first rotation mode. The first rotation mode controls the upper water-cooled plate corresponding to The first flow rate is greater than the second flow rate corresponding to the lower water-cooling plate; if the temperature control strategy is that the cooling amplitude of the lower battery cell is greater than the cooling amplitude of the upper battery cell, the motor controls the fan blades to operate in a second rotation mode, and the second rotation mode controls the second flow rate corresponding to the lower water-cooling plate to be greater than the first flow rate corresponding to the upper water-cooling plate; if the temperature control strategy is that the cooling amplitude of the upper battery cell is equal to the cooling amplitude of the lower battery cell, the motor controls the fan blades to operate in a third rotation mode, and the third rotation mode controls the first flow rate corresponding to the upper water-cooling plate to be equal to the second flow rate corresponding to the lower water-cooling plate, thereby achieving temperature control of the upper and lower battery cells.

[0103] In summary, the temperature control method proposed by steps 101 to 103 is applied to a temperature control system. The temperature control system first uses the temperature sensors of the upper battery cell and the lower battery cell to read the first real-time temperature corresponding to the upper battery cell and the second real-time temperature corresponding to the lower battery cell, determines the first temperature information according to the first real-time temperature, determines the second temperature information according to the second real-time temperature, and then determines the temperature control strategy according to the difference between the first temperature information and the second temperature information. When the difference between the first temperature information and the second temperature information is greater than the preset temperature difference threshold, it is considered that the difference between the first temperature information and the second temperature information exceeds expectations, so it is necessary to increase the cooling amplitude of the upper battery cell and reduce the cooling amplitude of the lower battery cell, so that the temperature difference between the upper battery cell temperature and the lower battery cell temperature is maintained within the preset temperature difference threshold. Therefore, the temperature control strategy when the difference between the first temperature information and the second temperature information is greater than the preset temperature difference threshold is that the cooling amplitude of the upper battery cell is greater than the cooling amplitude of the lower battery cell; the difference between the second temperature information and the first temperature information is greater than the preset temperature difference threshold. value, it is considered that the difference between the second temperature information and the first temperature information exceeds expectations, so it is necessary to increase the cooling amplitude of the battery lower cell and reduce the cooling amplitude of the battery upper cell, so that the temperature difference between the battery upper cell temperature and the battery lower cell temperature is maintained within the preset temperature difference threshold. Therefore, when the difference between the first temperature information and the second temperature information is greater than the preset temperature difference threshold, the temperature control strategy is that the cooling amplitude of the battery lower cell is greater than the cooling amplitude of the battery upper cell; when the difference between the first temperature information and the second temperature information is equal to the preset temperature difference threshold, then It is believed that the difference between the first temperature information and the second temperature information meets the set requirements, so the cooling amplitude of the battery cell in the lower layer is equal to the cooling amplitude of the battery cell in the upper layer, so that the temperature difference between the battery cell temperature in the upper layer and the battery cell temperature in the lower layer is maintained within the preset temperature difference threshold. Therefore, when the difference between the first temperature information and the second temperature information is equal to the preset temperature difference threshold, the temperature control strategy is that the cooling amplitude of the battery cell in the upper layer is equal to the cooling amplitude of the battery cell in the lower layer; the valve is controlled to rotate according to three different temperature control strategies to realize temperature control of the upper and lower layers of the battery.

[0104] The embodiment of the present application provides a temperature control method, which is applied to a temperature control system. The temperature control system includes an upper water-cooling plate corresponding to the upper battery cell of the battery, a lower water-cooling plate corresponding to the lower battery cell of the battery, and a valve. The temperature control system determines a first real-time temperature corresponding to the upper battery cell of the battery and a second real-time temperature corresponding to the lower battery cell of the battery; determines a temperature control strategy based on the first real-time temperature and the second real-time temperature; and controls the valve to rotate according to the temperature control strategy to achieve temperature control of the upper battery cell and the lower battery cell of the battery. It can be seen that in the embodiment of the present application, the real-time temperatures of the upper battery cell and the lower battery cell of the battery, i.e., the first real-time temperature and the second real-time temperature, are first determined by the temperature control system. Then, the corresponding temperature control strategy can be determined based on the real-time temperatures of the upper and lower battery cells, and the valve is controlled to rotate according to the temperature control strategy, thereby achieving temperature control of the upper battery cell and the lower battery cell of the battery. This can solve the problem of large temperature difference between the upper and lower battery cells, thereby improving the service life of the battery and the performance of the battery itself.

[0105] Based on the above embodiment, another embodiment of the present application provides a temperature control method, which is applied to a temperature control system. The temperature control system first reads a first real-time temperature corresponding to the upper battery cell and a second real-time temperature corresponding to the lower battery cell through a temperature sensor; determines first temperature information based on the first real-time temperature, and determines second temperature information based on the second real-time temperature. When the difference between the first temperature information and the second temperature information is greater than a preset temperature difference threshold, it is determined that the fan blades operate according to a first rotation mode. The first rotation mode is used to control the first flow corresponding to the upper cold water plate to be greater than the second flow corresponding to the lower cold water plate, that is, the motor controls the fan blades to rotate based on the previous first rotation mode, that is, to maintain the first flow corresponding to the upper water-cooled plate greater than the second flow corresponding to the lower water-cooled plate, so that the cooling amplitude of the upper battery cell is greater than the cooling amplitude of the lower battery cell. The rotation parameter corresponding to the fan blade is determined based on the absolute value of the difference, so that the motor controls the fan blades to rotate based on the rotation parameter to achieve temperature control of the upper battery cell and the lower battery cell.

[0106] In an embodiment of the present application, when the difference between the second temperature information and the first temperature information is greater than a preset temperature difference threshold, the fan blades are determined to operate in a second rotation mode, and the second rotation mode is used to control the second flow rate corresponding to the lower cold water plate to be greater than the first flow rate corresponding to the upper cold water plate, that is, the motor controls the fan blades to rotate based on the previous second rotation mode, that is, to maintain the second flow rate corresponding to the lower water-cooled plate greater than the first flow rate corresponding to the upper water-cooled plate, so that the cooling amplitude of the lower battery cells is greater than the cooling amplitude of the upper battery cells. The rotation parameter corresponding to the fan blade is determined based on the absolute value of the difference, so that the motor controls the fan blades to rotate based on the rotation parameter to achieve temperature control of the upper and lower battery cells.

[0107] In an embodiment of the present application, when the difference between the first temperature information and the second temperature information is equal to a preset temperature difference threshold, the fan blades are determined to operate in a third rotation mode, and the third rotation mode is used to control the first flow rate corresponding to the upper cold water plate to be equal to the second flow rate corresponding to the lower cold water plate, that is, the motor controls the fan blades to rotate based on the previous third rotation mode, that is, to maintain the first flow rate corresponding to the upper water-cooled plate equal to the second flow rate corresponding to the lower water-cooled plate, so that the temperature reduction amplitude of the upper battery cell is equal to the temperature reduction amplitude of the lower battery cell. The rotation parameter corresponding to the fan blade is determined based on the absolute value of the difference, so that the motor controls the fan blades to rotate based on the rotation parameter to achieve temperature control of the upper battery cell and the lower battery cell.

[0108] In an embodiment of the present application, FIG7 is a second flow chart of a temperature control method. As shown in FIG7 , the temperature control method of the temperature control system may include the following steps:

[0109] Step 201: Obtain a first real-time temperature corresponding to an upper battery cell and a second real-time temperature corresponding to a lower battery cell.

[0110] In an embodiment of the present application, temperature sensors are configured on the upper and lower layers of the battery in the temperature sensing system. Any number of temperature sensors can be configured at any location, and multiple temperature sensors are used to collect temperature. The temperature control system can first obtain a first real-time temperature corresponding to the upper battery cell and a second real-time temperature corresponding to the lower battery cell through the temperature sensors.

[0111] Step 202: Determine first temperature information corresponding to the upper battery cell according to the first real-time temperature, and determine second temperature information corresponding to the lower battery cell according to the second real-time temperature.

[0112] In an embodiment of the present application, after determining the first real-time temperature corresponding to the upper battery cell and the second real-time temperature corresponding to the lower battery cell, the first temperature information corresponding to the upper battery cell is determined based on the first real-time temperature, and the second temperature information corresponding to the lower battery cell is determined based on the second real-time temperature. In an embodiment of the present application, the first temperature information corresponding to the upper battery cell is determined based on the first real-time temperature corresponding to the upper battery cell. The first temperature information can be the average temperature of the entire upper battery cell, or the maximum, minimum, or intermediate value of the temperature of the upper battery cell, etc., which is not specifically limited in the embodiment of the present application.

[0113] In an embodiment of the present application, the second temperature information corresponding to the lower battery cell of the battery is determined by the second real-time temperature corresponding to the lower battery cell of the battery. The second temperature information can be the average temperature of the entire lower battery cell of the battery, or the maximum value, minimum value or intermediate value of the temperature of the lower battery cell of the battery, etc., which is not specifically limited in the embodiment of the present application.

[0114] In an embodiment of the present application, when the temperature control system reads the first real-time temperature corresponding to the upper battery cell and the second real-time temperature corresponding to the lower battery cell through the temperature sensor, the temperature sensor can read the temperatures of multiple different positions of the upper battery cell or the lower battery cell, and can also read the temperature of one point of the upper battery cell or the lower battery cell. This embodiment of the present application does not make specific limitations.

[0115] Step 203: The difference between the first temperature information and the second temperature information is greater than a preset temperature difference threshold, and the fan blade is determined to operate in a first rotation mode. The first rotation mode is used to control the first flow corresponding to the upper cold water plate to be greater than the second flow corresponding to the lower cold water plate.

[0116] In an embodiment of the present application, after determining the first temperature information corresponding to the upper battery cell according to the first real-time temperature and determining the second temperature information corresponding to the lower battery cell according to the second real-time temperature, when the difference between the first temperature information and the second temperature information is greater than the preset temperature difference threshold, the temperature control strategy is determined to be that the cooling amplitude of the upper battery cell is greater than the cooling amplitude of the lower battery cell.

[0117] It should be noted that, in an embodiment of the present application, when the difference between the first temperature information and the second temperature information is greater than the preset temperature difference threshold, it is considered that the difference between the first temperature information and the second temperature information exceeds expectations, so it is necessary to increase the cooling amplitude of the upper battery cells and reduce the cooling amplitude of the lower battery cells, so that the temperature difference between the upper battery cell temperature and the lower battery cell temperature is maintained within the preset temperature difference threshold. Therefore, when the difference between the first temperature information and the second temperature information is greater than the preset temperature difference threshold, the temperature control strategy is that the cooling amplitude of the upper battery cells is greater than the cooling amplitude of the lower battery cells.

[0118] In an embodiment of the present application, when the difference between the first temperature information and the second temperature information is greater than a preset temperature difference threshold, the temperature control strategy is determined to be that the cooling amplitude of the upper battery cell is greater than the cooling amplitude of the lower battery cell, and the motor controls the fan blades to operate in a first rotation mode, and the first rotation mode is used to control the first flow corresponding to the upper water-cooling plate to be greater than the second flow corresponding to the lower water-cooling plate.

[0119] In an embodiment of the present application, the temperature control system further includes a motor, and the valve includes blades. The motor controls the rotation of the blades, thereby controlling the flow distribution of the cooling medium between the upper and lower layers. The temperature control system issues control instructions to the motor based on the temperature control strategy, and the motor controls the rotation of the blades in the valve.

[0120] It should be noted that in the embodiments of the present application, the first rotation mode can be any rotation form. For example, the first rotation mode can be used to determine the rotation direction of the fan blades, or to determine the rotation speed of the fan blades, etc. The embodiments of the present application do not make specific limitations.

[0121] For example, in some embodiments, the first rotation mode may be that the fan blades rotate 30°, or 45°, or the fan blades rotate at a speed of 8 revs / second or 10 revs / second, which is not specifically limited in the embodiments of the present application.

[0122] In an embodiment of the present application, if the temperature control strategy is that the cooling amplitude of the upper battery cells is greater than the cooling amplitude of the lower battery cells, the fan blades are controlled to rotate so that the first flow corresponding to the upper water-cooling plate is greater than the second flow corresponding to the lower water-cooling plate, that is, the first rotation mode is adopted.

[0123] Step 204: The difference between the second temperature information and the first temperature information is greater than the preset temperature difference threshold, and the fan blade is determined to operate in the second rotation mode. The second rotation mode is used to control the second flow corresponding to the lower cold water plate to be greater than the first flow corresponding to the upper cold water plate.

[0124] In an embodiment of the present application, after determining the first temperature information corresponding to the upper battery cell according to the first real-time temperature and determining the second temperature information corresponding to the lower battery cell according to the second real-time temperature, when the difference between the second temperature information and the first temperature information is greater than the preset temperature difference threshold, the temperature control strategy is determined to be that the cooling amplitude of the lower battery cell is greater than the cooling amplitude of the upper battery cell.

[0125] It should be noted that, in an embodiment of the present application, when the difference between the second temperature information and the first temperature information is greater than the preset temperature difference threshold, it is considered that the difference between the second temperature information and the first temperature information exceeds expectations, so it is necessary to increase the cooling amplitude of the lower battery cells and reduce the cooling amplitude of the upper battery cells, so that the temperature difference between the upper battery cell temperature and the lower battery cell temperature is maintained within the preset temperature difference threshold. Therefore, when the difference between the first temperature information and the second temperature information is greater than the preset temperature difference threshold, the temperature control strategy is that the cooling amplitude of the lower battery cells is greater than the cooling amplitude of the upper battery cells.

[0126] In an embodiment of the present application, when the difference between the second temperature information and the first temperature information is greater than a preset temperature difference threshold, the temperature control strategy is determined to be that the cooling amplitude of the lower battery cells is greater than the cooling amplitude of the upper battery cells, and the motor controls the fan blades to operate in a second rotation mode, and the second rotation mode is used to control the second flow corresponding to the lower water cooling plate to be greater than the first flow corresponding to the upper water cooling plate.

[0127] It should be noted that in the embodiments of the present application, the second rotation mode can be any rotation form. For example, the second rotation mode can be used to determine the rotation direction of the fan blades, or to determine the rotation speed of the fan blades, etc. The embodiments of the present application do not make specific limitations.

[0128] For example, in some embodiments, the second rotation mode may be that the fan blades rotate 30°, or 45°, or the fan blades rotate at a speed of 8 revs / second or 10 revs / second, which is not specifically limited in the embodiments of the present application.

[0129] In an embodiment of the present application, if the temperature control strategy is that the cooling amplitude of the lower battery cells is greater than the cooling amplitude of the upper battery cells, the fan blades are controlled to rotate so that the second flow corresponding to the lower water-cooling plate is greater than the first flow corresponding to the upper water-cooling plate, that is, the second rotation mode is adopted.

[0130] It should be noted that in an embodiment of the present application, when controlling the rotation of the fan blades, a control instruction is given to the motor, and the rotation of the fan blades is controlled by the motor. The temperature control system determines the rotation parameters corresponding to the fan blades based on the absolute value of the difference between the first temperature information and the second temperature information, and the motor controls the fan blades to rotate based on the rotation parameters.

[0131] Step 205: The difference between the first temperature information and the second temperature information is equal to the preset temperature difference threshold, and the fan blade is determined to operate in a third rotation mode, which is used to control the first flow corresponding to the upper cold water plate to be equal to the second flow corresponding to the lower cold water plate.

[0132] In an embodiment of the present application, after determining the first temperature information corresponding to the upper battery cell according to the first real-time temperature and determining the second temperature information corresponding to the lower battery cell according to the second real-time temperature, when the difference between the first temperature information and the second temperature information is less than or equal to the preset temperature difference threshold, the temperature control strategy is determined to be that the cooling amplitude of the upper battery cell is equal to the cooling amplitude of the lower battery cell.

[0133] It should be noted that, in an embodiment of the present application, when the difference between the first temperature information and the second temperature information is equal to the preset temperature difference threshold, it is considered that the difference between the first temperature information and the second temperature information meets the set requirements, so the cooling amplitude of the lower battery cell is equal to the cooling amplitude of the upper battery cell, so that the temperature difference between the upper battery cell temperature and the lower battery cell temperature is maintained within the preset temperature difference threshold. Therefore, the temperature control strategy when the difference between the first temperature information and the second temperature information is equal to the preset temperature difference threshold is that the cooling amplitude of the upper battery cell is equal to the cooling amplitude of the lower battery cell.

[0134] It should be noted that, in the embodiments of the present application, the preset temperature difference threshold value can be any integer value, and the embodiments of the present application do not specifically limit it.

[0135] For example, in some embodiments, the preset temperature difference threshold can be a value greater than or equal to -4 and less than 5 (industrial design requires that the battery cell temperature difference is within 5°C). For example, the preset threshold can be 0°C or 4°C, which is not specifically limited in the embodiments of the present application.

[0136] In an embodiment of the present application, when the difference between the first temperature information and the second temperature information is less than or equal to a preset temperature difference threshold, the temperature control strategy is determined to be that the cooling amplitude of the upper battery cell is less than or equal to the cooling amplitude of the lower battery cell, and the motor controls the fan blades to operate in a third rotation mode, and the third rotation mode is used to control the first flow corresponding to the upper water-cooling plate to be equal to the second flow corresponding to the lower water-cooling plate.

[0137] In an embodiment of the present application, the temperature control system further includes a motor, and the valve includes blades. The motor controls the rotation of the blades, thereby controlling the flow distribution of the cooling medium between the upper and lower layers. The temperature control system issues control instructions to the motor based on the temperature control strategy, and the motor controls the rotation of the blades in the valve.

[0138] It should be noted that in the embodiments of the present application, the third rotation mode can be any rotation form. For example, the third rotation mode can be used to determine the rotation direction of the fan blades, or to determine the rotation speed of the fan blades, etc. The embodiments of the present application do not make specific limitations.

[0139] For example, in some embodiments, the third rotation mode may be for the fan blades to maintain a horizontal position, or to rotate at a constant speed, which is not specifically limited in the embodiments of the present application.

[0140] In an embodiment of the present application, if the temperature control strategy is that the cooling amplitude of the upper battery cells is equal to the cooling amplitude of the lower battery cells, the fan blades are controlled to rotate so that the first flow corresponding to the upper water-cooling plate is equal to the second flow corresponding to the lower water-cooling plate, that is, the third rotation mode is adopted.

[0141] Step 206 : determining the rotation parameters corresponding to the fan blades according to the absolute value of the difference, so that the motor controls the fan blades to rotate based on the rotation parameters, thereby achieving temperature control of the upper battery cells and the lower battery cells.

[0142] In an embodiment of the present application, after determining that the motor controls the fan blades to operate in different rotation modes, the rotation parameters corresponding to the fan blades are determined based on the absolute value of the difference, so that the motor controls the fan blades to rotate based on the rotation parameters, thereby achieving temperature control of the upper and lower battery cells.

[0143] In an embodiment of the present application, when the absolute value of the difference between the first temperature information and the second temperature information exceeds a preset temperature difference threshold, the rotation parameter corresponding to the fan blade can be determined according to the absolute value of the difference, so that the motor controls the fan blade to rotate based on the rotation parameter.

[0144] It should be noted that, in the embodiments of the present application, the rotation parameters may include any rotation speed, such as angular velocity, rotational speed, etc., which is not specifically limited in the embodiments of the present application.

[0145] It should be noted that in an embodiment of the present application, when controlling the rotation of the fan blades, a control instruction is given to the motor, and the rotation of the fan blades is controlled by the motor. The temperature control system determines the rotation parameters corresponding to the fan blades based on the absolute value of the difference between the first temperature information and the second temperature information, and the motor controls the fan blades to rotate based on the rotation parameters.

[0146] In an embodiment of the present application, when the absolute value of the difference between the first temperature information and the second temperature information exceeds a preset temperature difference threshold, the rotation parameter corresponding to the fan blade can be determined according to the absolute value of the difference, so that the motor controls the fan blade to rotate based on the rotation parameter.

[0147] It should be noted that, in the embodiments of the present application, the rotation parameters may include any rotation speed, such as angular velocity, rotational speed, etc., which is not specifically limited in the embodiments of the present application.

[0148] It should be noted that in an embodiment of the present application, if the temperature control strategy is that the cooling amplitude of the upper battery cells is greater than the cooling amplitude of the lower battery cells, and the temperature control strategy before this is also that the cooling amplitude of the upper battery cells is greater than the cooling amplitude of the lower battery cells, that is, the motor controls the fan blades to rotate based on the previous first rotation mode, that is, the first flow rate corresponding to the upper water-cooling plate is kept greater than the second flow rate corresponding to the lower water-cooling plate, so that the cooling amplitude of the upper battery cells is greater than the cooling amplitude of the lower battery cells.

[0149] It should be noted that in an embodiment of the present application, if the temperature control strategy is that the cooling amplitude of the lower battery cells is greater than the cooling amplitude of the upper battery cells, and the temperature control strategy before this is also that the cooling amplitude of the lower battery cells is greater than the cooling amplitude of the upper battery cells, that is, the motor controls the fan blades to rotate based on the previous second rotation mode, that is, the second flow rate corresponding to the lower water-cooling plate is kept greater than the first flow rate corresponding to the upper water-cooling plate, so that the cooling amplitude of the lower battery cells is greater than the cooling amplitude of the upper battery cells.

[0150] It should be noted that, in an embodiment of the present application, if the temperature control strategy is that the cooling amplitude of the upper battery cell is equal to the cooling amplitude of the lower battery cell, and the temperature control strategy before that is also that the cooling amplitude of the upper battery cell is equal to the cooling amplitude of the lower battery cell, that is, the motor controls the fan blades to rotate based on the previous third rotation mode, that is, the first flow rate corresponding to the upper water-cooling plate is kept equal to the second flow rate corresponding to the lower water-cooling plate, so that the cooling amplitude of the upper battery cell is equal to the cooling amplitude of the lower battery cell.

[0151] For example, in some embodiments, when the absolute value of the difference is large, the rotation parameter is also large, and when the absolute value of the difference is small, the rotation parameter will also become smaller. For example, when the absolute value of the difference is 5, the rotation parameter is that the fan blades rotate at a speed of 8 revolutions / second, or the fan blades rotate 60°, etc. When the absolute value of the difference is 1, the rotation parameter is that the fan blades rotate at a speed of 4 revolutions / second, or the fan blades rotate 30°, etc. The embodiments of this application do not make specific limitations.

[0152] In an embodiment of the present application, when the absolute value of the difference between the first temperature information and the second temperature information is greater than a preset temperature difference threshold, different rotation parameters corresponding to the fan blades are determined according to different absolute values ​​of the difference, so that the motor controls the fan blades to rotate based on different rotation parameters.

[0153] The embodiment of the present application provides a temperature control method, which is applied to a temperature control system. The temperature control method is applied to a temperature control system, which includes an upper water-cooling plate corresponding to the upper battery cell of the battery, a lower water-cooling plate corresponding to the lower battery cell of the battery, and a valve. First, a first real-time temperature corresponding to the upper battery cell of the battery and a second real-time temperature corresponding to the lower battery cell of the battery are read through a temperature sensor; the first real-time temperature corresponding to the upper battery cell of the battery and the second real-time temperature corresponding to the lower battery cell of the battery are judged and compared. There are three situations in which the first real-time temperature corresponding to the upper battery cell of the battery and the second real-time temperature corresponding to the lower battery cell of the battery are larger than the second real-time temperature corresponding to the lower battery cell of the battery. Three temperature values ​​are obtained according to the three situations. The temperature control strategy is adopted, and then it is determined whether the difference in temperature information is greater than a preset temperature difference threshold. If it is within the preset temperature difference threshold, the previous rotation mode is maintained; if it is outside the preset temperature difference threshold, the temperature reduction amplitude of the upper battery cell and the lower battery cell of the battery are determined according to the temperature control strategy. The temperature control system gives a control instruction to the valve according to the temperature control strategy. The valve includes fan blades, and the fan blades are controlled by an electric motor to work in three rotation modes to control the first flow corresponding to the upper water cooling plate and the second flow corresponding to the lower water cooling plate. The temperature control of the upper battery cell and the lower battery cell of the battery is achieved through the above temperature control method, thereby improving the service life of the battery and the performance of the battery itself.

[0154] Based on the above embodiments, another embodiment of the present application proposes a temperature control method, which can be applied to a temperature control system, wherein the structural parts of the temperature control system include a water inlet for the coolant, a water outlet for the coolant, a water inlet pipe assembly, a water outlet pipe assembly, a water inlet flow control valve (valve), a motor, an upper water-cooled plate (an upper water-cooled plate corresponding to the upper cell of the battery), and a lower water-cooled plate (a lower water-cooled plate corresponding to the lower cell of the battery). The water inlet flow control valve is connected to the motor, and the rotation of the valve is controlled by the motor. The valve includes fan blades, and the rotation of the fan blades is controlled by the motor to control the flow distribution of the upper and lower layers of cooling medium. The motor controls the distribution of the flow, and the motor controls the rotation of the internal fan blades by rotating, thereby affecting the flow distribution of the water inlet.

[0155] Exemplarily, in an embodiment of the present application, FIG8 is a schematic diagram of the implementation framework of the temperature control method proposed in an embodiment of the present application, as shown in FIG8. The temperature control of the double-layer battery core can be achieved through a water inlet, a water outlet, a water outlet pipe assembly, a water inlet pipe assembly, a motor, a water inlet flow control valve (valve), an upper water-cooled plate, and a lower water-cooled plate. Among them, the water inlet is the inlet of the coolant, the water outlet is the outlet of the coolant, the water outlet pipe assembly is located between the water outlet and the liquid-cooled plate, including the water outlet pipes of the upper liquid-cooled plate and the lower liquid-cooled plate, the water inlet pipe assembly is located between the water inlet and the liquid-cooled plate, including the water inlet pipes of the upper liquid-cooled plate and the lower liquid-cooled plate, the water inlet flow control valve is connected to the motor, and the rotation of the valve is controlled by the motor. The direction and amplitude of the rotation of the motor are controlled by the BMS, and the vehicle is powered by a low-voltage 12V. The upper water-cooled plate is responsible for cooling the upper battery core, and the lower water-cooled plate is responsible for cooling the lower battery core.

[0156] For example, in an embodiment of the present application, FIG9 is a schematic diagram of the water inlet proposed in an embodiment of the present application.

[0157] For example, in an embodiment of the present application, FIG10 is a schematic diagram of a water outlet proposed in an embodiment of the present application.

[0158] For example, in an embodiment of the present application, FIG11 is a schematic diagram of the upper and lower water-cooling plates proposed in an embodiment of the present application.

[0159] For example, in an embodiment of the present application, FIG12 is a schematic top view of the upper water-cooling plate proposed in an embodiment of the present application.

[0160] It should be noted that, in the embodiment of the present application, FIG13 is a flow distribution diagram 1 proposed in the embodiment of the present application. As shown in FIG13 , the BMS (temperature control system) reads the temperature of the upper and lower battery cells through the temperature sampling harness, identifies the overall average temperature of the upper battery cells and the overall average temperature of the lower battery cells, and when the average temperature difference between the upper battery cells and the lower battery cells is within T°C (the preset temperature difference threshold), the valve is in a horizontal position, and the BMS does not control the valve (water inlet flow control valve). That is, under normal conditions, the fan blades are in a horizontal position (the third rotation mode), and the liquid cooling medium (cooling medium) is evenly distributed to the upper liquid cooling plate water inlet (the upper water cooling plate corresponding to the upper battery cell of the battery) and the lower liquid cooling plate water inlet (the lower water cooling plate corresponding to the lower battery cell of the battery).

[0161] It should be noted that, in the embodiment of the present application, Figure 14 is a second flow distribution diagram proposed in the embodiment of the present application. As shown in Figure 14, if the average temperature difference between the upper and lower battery cells is above T°C (preset temperature difference threshold) (T (preset temperature difference threshold) depends on different design requirements. For strict design requirements, the T (preset temperature difference threshold) value is smaller. For looser design requirements, the T value can be appropriately larger), the BMS starts to control the valve (water inlet flow control valve) to distribute the flow of the upper and lower water inlets. When the average temperature of the upper battery cell exceeds the average temperature of the lower battery cell T°C (preset temperature difference threshold), the fan blades rotate clockwise (first rotation mode), reducing the space of the water inlet of the lower water-cooled plate, thereby reducing the flow of the cooling medium of the lower water-cooled plate.

[0162] It should be noted that, in the embodiment of the present application, Figure 15 is a flow distribution diagram three proposed in the embodiment of the present application. As shown in Figure 15, when the average temperature of the lower battery cell exceeds the average temperature T°C of the upper battery cell (preset temperature difference threshold), the fan blades rotate counterclockwise (second rotation mode), thereby reducing the flow rate of the cooling medium of the upper water-cooled plate, so as to achieve the purpose of reducing the average temperature of the upper and lower battery cells.

[0163] In the embodiment of the present application, when the average temperature of the upper and lower cells falls back to within T°C (the preset temperature difference threshold), the BMS controls the valve to return to normal operation (the third rotation mode). This temperature control strategy ensures temperature consistency between the upper and lower cells of the double-layer battery, improving battery life and performance.

[0164] The present application provides a temperature control method that can be applied to a temperature control system, wherein the structural components of the temperature control system include a coolant inlet, a coolant outlet, an inlet pipe assembly, an outlet pipe assembly, an inlet flow control valve (valve), an electric motor, an upper water-cooling plate (the upper water-cooling plate corresponding to the upper battery cells), and a lower water-cooling plate (the lower water-cooling plate corresponding to the lower battery cells). The inlet flow control valve is connected to the electric motor, which controls the rotation of the valve. The valve includes fan blades, which are controlled by the electric motor to control the rotation of the fan blades, thereby controlling the flow distribution of the upper and lower layers of cooling medium. When the average temperature difference between the upper and lower cells is within the preset temperature difference threshold, the valve is in the horizontal position, and the BMS does not control the valve at this time; if the average temperature difference between the upper and lower cells is above the preset temperature difference threshold (the preset temperature difference threshold depends on different design requirements. For strict design requirements, the preset temperature difference threshold is smaller. For looser design requirements, the preset temperature difference threshold can be appropriately larger), the BMS starts to control the valve to distribute the flow between the upper and lower water inlets.

[0165] Based on the above embodiment, in another embodiment of the present application, FIG16 is a third schematic diagram of the structure of the temperature control system proposed in the embodiment of the present application. As shown in FIG16 , the temperature control system 11 proposed in the embodiment of the present application may include a determination unit 111 and a control unit 112, wherein:

[0166] The determining unit 111 is used to determine a first real-time temperature corresponding to the upper battery cell and a second real-time temperature corresponding to the lower battery cell; and is also used to determine a temperature control strategy according to the first real-time temperature and the second real-time temperature;

[0167] The control unit 112 is used to control the valve to rotate according to the temperature control strategy to achieve temperature control of the upper battery cells and the lower battery cells.

[0168] In an embodiment of the present application, Figure 17 is a schematic diagram of the composition structure of the control device proposed in the embodiment of the present application. As shown in Figure 17, the control device 12 proposed in the embodiment of the present application may also include a processor 121, a memory 122, a communication interface 123, and a bus 124 for connecting the processor 121, the memory 122 and the communication interface 123.

[0169] In an embodiment of the present application, the processor 121 may be at least one of an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a central processing unit (CPU), a controller, a microcontroller, and a microprocessor. It is understandable that for different devices, the electronic device used to implement the above-mentioned processor function may also be other, and the embodiment of the present application is not specifically limited. The control device 11 may also include a memory 122, which may be connected to the processor 121, wherein the memory 122 is used to store executable program code, the program code including computer operating instructions, and the memory 122 may include a high-speed RAM memory, and may also include a non-volatile memory, for example, at least two disk memories.

[0170] In the embodiment of the present application, the bus 124 is used to connect the communication interface 123, the processor 121 and the memory 122, as well as the mutual communication between these devices.

[0171] In actual applications, the above-mentioned memory 122 can be a volatile memory (volatile memory), such as random-access memory (RAM); or a non-volatile memory (non-volatile memory), such as read-only memory (ROM), flash memory, hard disk drive (HDD) or solid-state drive (SSD); or a combination of the above types of memory, and provide instructions and data to the processor 121.

[0172] In an embodiment of the present application, the processor 121 is used to determine a first real-time temperature corresponding to the upper battery cell and a second real-time temperature corresponding to the lower battery cell; determine a temperature control strategy based on the first real-time temperature and the second real-time temperature; and control the valve to rotate according to the temperature control strategy to achieve temperature control of the upper battery cell and the lower battery cell.

[0173] The memory 122 is used to store computer programs that can be run on the processor.

[0174] In addition, the functional modules in this embodiment may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or software functional modules.

[0175] If the integrated unit is implemented as a software functional module and is not sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this embodiment, or the portion that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the method of this embodiment. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0176] An embodiment of the present application provides a computer-readable storage medium having a program stored thereon, which implements the temperature control method described above when executed by a processor.

[0177] The program instructions corresponding to a temperature control method in this embodiment may be stored on a storage medium such as a CD, a hard disk, or a USB flash drive. When the program instructions corresponding to a temperature control method in the storage medium are read or executed by an electronic device, the following steps are included:

[0178] Determining a first real-time temperature corresponding to the upper battery cell of the battery and a second real-time temperature corresponding to the lower battery cell of the battery;

[0179] determining a temperature control strategy according to the first real-time temperature and the second real-time temperature;

[0180] The valve is controlled to rotate according to a temperature control strategy to achieve temperature control of the upper battery cell and the lower battery cell.

[0181] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of hardware embodiments, software embodiments, or embodiments combining software and hardware. Furthermore, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0182] The present application is described with reference to the implementation flow diagram and / or block diagram of the method, device (system) and computer program product according to the embodiment of the present application. It should be understood that each flow and / or box in the flow diagram and / or block diagram and the combination of the flow and / or box in the flow diagram and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processing machine or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for realizing the function specified in one flow diagram or multiple flows and / or one block or multiple blocks of the block diagram.

[0183] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device that implements the functions specified in implementing one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0184] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0185] The above description is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application.

Claims

1. A temperature control method, wherein: The method is applied to a temperature control system, the temperature control system includes an upper cold water plate corresponding to the upper battery core of the battery, a lower cold water plate corresponding to the lower battery core of the battery, and a valve, and the method includes: Determine a first real-time temperature corresponding to the upper battery cell of the battery and a second real-time temperature corresponding to the lower battery cell of the battery; determining a temperature control strategy according to the first real-time temperature and the second real-time temperature; The valve is controlled to rotate according to a temperature control strategy to achieve temperature control of the upper battery cell and the lower battery cell.

2. The method according to claim 1, wherein: The determining of the temperature control strategy according to the first real-time temperature and the second real-time temperature includes: Determine first temperature information corresponding to the upper battery cell of the battery according to the first real-time temperature; Determine second temperature information corresponding to the lower layer battery cell of the battery according to the second real-time temperature; The temperature control strategy is determined according to the first temperature information and the second temperature information.

3. The method according to claim 1, wherein: The determining the temperature control strategy according to the first temperature information and the second temperature information includes: When the difference between the first temperature information and the second temperature information is greater than a preset temperature difference threshold, determining that the temperature control strategy is such that the temperature reduction amplitude of the upper battery cell is greater than the temperature reduction amplitude of the lower battery cell; When the difference between the second temperature information and the first temperature information is greater than a preset temperature difference threshold, determining that the temperature control strategy is such that the temperature reduction amplitude of the battery lower layer cells is greater than the temperature reduction amplitude of the battery upper layer cells; When the absolute value of the difference between the first temperature information and the second temperature information is less than or equal to a preset temperature difference threshold, the temperature control strategy is determined to be that the temperature reduction amplitude of the upper battery cell is equal to the temperature reduction amplitude of the lower battery cell.

4. The method according to any one of claims 1 to 3, wherein: The temperature control system further comprises a motor, the valve comprises fan blades, and the motor is used to control the rotation mode of the fan blades to achieve rotation control of the valve.

5. The method according to claim 4, wherein: The step of controlling the valve to rotate according to the temperature control strategy comprises: When the temperature control strategy is that the cooling amplitude of the upper battery cells is greater than the cooling amplitude of the lower battery cells, the fan blades are controlled by the motor to operate in a first rotation mode; wherein the first rotation mode is used to control the first flow rate corresponding to the upper cold water plate to be greater than the second flow rate corresponding to the lower cold water plate.

6. The method according to claim 4, wherein: The step of controlling the valve to rotate according to the temperature control strategy comprises: When the temperature control strategy is that the cooling amplitude of the lower battery cells is greater than the cooling amplitude of the upper battery cells, the fan blades are controlled by the motor to operate in a second rotation mode; wherein the second rotation mode is used to control the second flow rate corresponding to the lower cold water plate to be greater than the first flow rate corresponding to the upper cold water plate.

7. The method according to claim 4, wherein: The step of controlling the valve to rotate according to the temperature control strategy comprises: When the temperature control strategy is that the cooling amplitude of the upper battery cells is equal to the cooling amplitude of the lower battery cells, the fan blades are controlled by the motor to operate in a third rotation mode; wherein the third rotation mode is used to control the first flow corresponding to the upper cold water plate to be equal to the second flow corresponding to the lower cold water plate.

8. The method according to claim 5 or 6, wherein: The method further comprises: When the absolute value of the difference between the first temperature information and the second temperature information is greater than the preset temperature difference threshold, the rotation parameter corresponding to the fan blade is determined according to the absolute value of the difference, so that the motor controls the fan blade to rotate based on the rotation parameter.

9. A temperature control system, wherein: The temperature control system comprises: a determination unit, a control unit, The determining unit is used to determine a first real-time temperature corresponding to the upper battery cell of the battery and a second real-time temperature corresponding to the lower battery cell of the battery; The determining unit is further configured to determine a temperature control strategy according to the first real-time temperature and the second real-time temperature; The control unit is used to control the valve to rotate according to the temperature control strategy, so as to achieve temperature control of the upper battery cell and the lower battery cell.

10. A control device, wherein: The control device includes a processor and a memory; The memory is used to store a computer program that can be run on the processor; The processor is configured to execute the method according to any one of claims 1 to 8 when running the computer program.

11. A vehicle device, wherein: The vehicle equipment includes a temperature control system, and the temperature control system includes an upper cold water plate corresponding to the upper battery cell of the battery, a lower cold water plate corresponding to the lower battery cell of the battery, and a valve; The temperature control system is used to perform the method according to any one of claims 1 to 8.

12. A computer-readable storage medium having a program stored thereon, wherein: When the program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.

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