Cooling control method and cooling control device for power battery

Abstract

The invention provides a cooling control method and a cooling control device for a power battery, and the cooling control method is applied to a power battery cooling system comprising liquid cooling equipment and temperature collection equipment. Acquiring working temperature values of the power battery, which are respectively acquired by a plurality of acquisition points in temperature acquisition equipment; determining a target working temperature value of the power battery based on the working temperature value and a distance value between the acquisition points; whether the target working temperature value is larger than a preset temperature value or not is judged, a judgment result is obtained, and the working mode of the liquid cooling equipment is determined based on the judgment result; and the liquid cooling equipment is controlled to cool the power battery according to the working mode, so that the target working temperature value is stabilized in the preset temperature interval. Through the method, the cooling effect and the stability of the power battery are improved, so that the service life and the safety of the power battery are improved.

Description

Technical Field

[0001] The present application relates to the technical field of power battery cooling, and in particular to a cooling control method and a cooling control device for a power battery. Background Art

[0002] The operating temperature of the power battery in a vehicle is one of the important indicators that affect the fast charging performance of the battery. When the operating temperature is too high, it will cause problems such as limited fast charging performance and accelerated battery aging, reducing the battery life and thus affecting the cruising range of the electric vehicle; in addition, high temperature will not only reduce the working efficiency of the power battery, but also reduce the safety of the vehicle.

[0003] At present, the main methods for cooling power batteries in vehicles include air cooling, liquid cooling and phase change material cooling. Among them, although air cooling has a lower structural cost, it is difficult to meet the heat dissipation requirements of high-temperature power batteries through natural air cooling, and the cooling effect is poor. Phase change material cooling has a high investment cost in actual application and the material is heavy, which is not conducive to the mass production and development of power batteries. With the improvement of battery integration methods and the emergence of new battery materials, traditional liquid cooling methods and equipment are difficult to meet the cooling needs of power batteries, reducing the cooling effect and stability of power batteries, and thus reducing the life and safety of power batteries. Summary of the Invention

[0004] In view of this, the purpose of the present application is to provide a cooling control method and a cooling control device for a power battery, wherein the operating temperature value of the power battery is collected by a temperature collection device in the power battery cooling system, and the target operating temperature value of the power battery is determined. According to the judgment result of whether the target operating temperature value is greater than the preset temperature value, the working mode of the liquid cooling device in the power battery cooling system is determined, and the liquid cooling device is controlled to cool the power battery according to the working mode, so that the operating temperature value of the power battery is stabilized within the preset temperature range, thereby improving the cooling effect and stability of the power battery, and thereby improving the life and safety of the power battery.

[0005] An embodiment of the present application provides a cooling control method for a power battery, which is applied to a power battery cooling system; wherein the power battery cooling system includes a liquid cooling device and a temperature acquisition device, and the cooling control method includes: In response to a vehicle in which a power battery is provided having started the power battery cooling system, obtaining operating temperature values ​​of the power battery respectively collected by a plurality of collection points in the temperature collection device; determining a target operating temperature value of the power battery based on the operating temperature value and the distance value between the collection points; Determining whether the target operating temperature value is greater than a preset temperature value, obtaining a determination result, and determining an operating mode of the liquid cooling device based on the determination result; The liquid cooling device is controlled to cool the power battery according to the operating mode so that the target operating temperature value is stabilized within a preset temperature range.

[0006] Furthermore, in response to the vehicle in which the power battery is provided having started the power battery cooling system, obtaining the operating temperature values ​​of the power battery respectively collected by a plurality of collection points in the temperature collection device includes: In response to a vehicle provided with a power battery being in a start-up state, obtaining operating mode information of the vehicle; Based on the operating mode information, determining whether the power battery cooling system is allowed to be turned on; If the power battery cooling system is allowed to be turned on, the power battery cooling system is turned on, and the operating temperature values ​​of the power battery respectively collected by multiple collection points in the temperature collection device are obtained.

[0007] Furthermore, determining the target operating temperature value of the power battery based on the operating temperature value and the distance value between the collection points includes: Determining a weight coefficient corresponding to each of the collection points based on the distance value between the collection points; Multiplying the operating temperature value collected at each collection point by the weight coefficient to obtain a product result, and determining the product result as the weighted temperature value corresponding to each collection point; The sum of the weighted temperature values ​​is determined as the target operating temperature value of the power battery.

[0008] Furthermore, determining the weight coefficient corresponding to each of the collection points based on the distance value between the collection points includes: Obtaining the distance values ​​respectively corresponding to the location of each of the collection points and the location of a preset target collection point among the collection points, and determining the sum of the distance values ​​as a total distance value; The ratio of the distance value corresponding to each of the collection points to the total distance value is determined as a weight coefficient corresponding to each of the collection points.

[0009] Furthermore, determining the operating mode of the liquid cooling device based on the judgment result includes: When the determination result is that the target operating temperature value is greater than the preset temperature value, determining that the operating mode of the liquid cooling device is a first operating mode; wherein the first operating mode indicates that the liquid cooling device dissipates the internal heat of the power battery in a timely manner; When the judgment result is that the target operating temperature value is less than or equal to the preset temperature value, the operating mode of the liquid cooling device is determined to be the second operating mode; wherein, the second operating mode indicates that the liquid cooling device dissipates the heat continuously generated by the power battery during operation.

[0010] Furthermore, controlling the liquid cooling device to cool the power battery according to the working mode includes: When it is determined that the operating mode is the first operating mode, controlling the liquid cooling device to continuously cool the power battery at a first operating power until a cooling duration reaches a first preset operating time; When it is determined that the operating mode is the second operating mode, the liquid cooling device is controlled to intermittently cool the power battery multiple times at a second operating power until the cooling duration reaches a second preset operating time; wherein the duration of each cooling is the preset intermittent time.

[0011] The present application also provides a cooling control device for a power battery, the cooling control device comprising: a temperature acquisition module, configured to acquire operating temperature values ​​of the power battery respectively acquired by a plurality of acquisition points in a temperature acquisition device in response to a power battery cooling system being activated in a vehicle equipped with the power battery; a temperature determination module, configured to determine a target operating temperature value of the power battery based on the operating temperature value and the distance value between the collection points; a temperature judgment module, configured to judge whether the target operating temperature value is greater than a preset temperature value, obtain a judgment result, and determine an operating mode of the liquid cooling device based on the judgment result; A cooling control module is used to control the liquid cooling device to cool the power battery according to the working mode, so that the target operating temperature value is stabilized within a preset temperature range.

[0012] Furthermore, when the temperature acquisition module is used to obtain the operating temperature values ​​of the power battery respectively collected by multiple collection points in the temperature acquisition device in response to the vehicle in which the power battery is installed having turned on the power battery cooling system, the temperature acquisition module is used to: In response to a vehicle provided with a power battery being in a start-up state, obtaining operating mode information of the vehicle; Based on the operating mode information, determining whether the power battery cooling system is allowed to be turned on; If the power battery cooling system is allowed to be turned on, the power battery cooling system is turned on, and the operating temperature values ​​of the power battery respectively collected by multiple collection points in the temperature collection device are obtained.

[0013] Furthermore, when the temperature determination module is used to determine the target operating temperature value of the power battery based on the operating temperature value and the distance value between the collection point, the temperature determination module is used to: Determining a weight coefficient corresponding to each of the collection points based on the distance value between the collection points; Multiplying the operating temperature value collected at each collection point by the weight coefficient to obtain a product result, and determining the product result as the weighted temperature value corresponding to each collection point; The sum of the weighted temperature values ​​is determined as the target operating temperature value of the power battery.

[0014] Furthermore, when the temperature determination module is used to determine the weight coefficient corresponding to each of the collection points based on the distance value between the collection points, the temperature determination module is used to: Obtaining the distance values ​​respectively corresponding to the location of each of the collection points and the location of a preset target collection point among the collection points, and determining the sum of the distance values ​​as a total distance value; The ratio of the distance value corresponding to each of the collection points to the total distance value is determined as a weight coefficient corresponding to each of the collection points.

[0015] Furthermore, when the temperature judgment module is used to determine the working mode of the liquid cooling device based on the judgment result, the temperature judgment module is used to: When the determination result is that the target operating temperature value is greater than the preset temperature value, determining that the operating mode of the liquid cooling device is a first operating mode; wherein the first operating mode indicates that the liquid cooling device dissipates the internal heat of the power battery in a timely manner; When the judgment result is that the target operating temperature value is less than or equal to the preset temperature value, the operating mode of the liquid cooling device is determined to be the second operating mode; wherein, the second operating mode indicates that the liquid cooling device dissipates the heat continuously generated by the power battery during operation.

[0016] Furthermore, when the cooling control module is used to control the liquid cooling device to cool the power battery according to the working mode, the cooling control module is used to: When it is determined that the operating mode is the first operating mode, controlling the liquid cooling device to continuously cool the power battery at a first operating power until a cooling duration reaches a first preset operating time; When it is determined that the operating mode is the second operating mode, the liquid cooling device is controlled to intermittently cool the power battery multiple times at a second operating power until the cooling duration reaches a second preset operating time; wherein the duration of each cooling is the preset intermittent time.

[0017] An embodiment of the present application further provides a power battery cooling system, comprising: a power battery cooling control device, a liquid cooling device, and a temperature acquisition device. When running, the power battery cooling system executes the steps of the power battery cooling control method as described above.

[0018] An embodiment of the present application also provides a vehicle, which is provided with the power battery cooling system as described above.

[0019] An embodiment of the present application also provides an electronic device, comprising: a processor, a memory, and a bus, wherein the memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor and the memory communicate through the bus, and when the machine-readable instructions are executed by the processor, the steps of the power battery cooling control method as described above are performed.

[0020] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the power battery cooling control method as described above are executed.

[0021] The embodiments of the present application provide a cooling control method and a cooling control device for a power battery, wherein the cooling control method is applied to a power battery cooling system; wherein the power battery cooling system includes a liquid cooling device and a temperature collection device, and the cooling control method includes: in response to a vehicle in which the power battery is installed having turned on the power battery cooling system, obtaining an operating temperature value of the power battery collected by multiple collection points in the temperature collection device; determining a target operating temperature value of the power battery based on the operating temperature value and a distance value between the collection points; judging whether the target operating temperature value is greater than a preset temperature value, obtaining a judgment result, and determining an operating mode of the liquid cooling device based on the judgment result; and controlling the liquid cooling device to cool the power battery according to the operating mode so that the target operating temperature value is stabilized within a preset temperature range.

[0022] Compared with the air cooling, liquid cooling and phase change material cooling methods in the prior art, the operating temperature value of the power battery is collected by the temperature collection device in the power battery cooling system, and the target operating temperature value of the power battery is determined. According to the judgment result of whether the target operating temperature value is greater than the preset temperature value, the working mode of the liquid cooling device in the power battery cooling system is determined, and the liquid cooling device is controlled to cool the power battery according to the working mode, so that the operating temperature value of the power battery is stabilized within the preset temperature range, thereby improving the cooling effect and stability of the power battery, and thus improving the life and safety of the power battery.

[0023] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic structural diagram of a power battery cooling system provided in an embodiment of the present application; Figure 2 A flowchart of a cooling control method for a power battery provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of a temperature acquisition device provided in an embodiment of the present application; Figure 4 A schematic diagram of the external structure of a battery cooling structure provided in an embodiment of the present application; Figure 5 A schematic diagram of the internal structure of a battery cooling structure provided in an embodiment of the present application; Figure 6 A schematic structural diagram of a power battery cooling control device provided in an embodiment of the present application; Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for which protection is claimed, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, each other embodiment obtained by those skilled in the art without making creative work falls within the scope of protection of the present application.

[0027] Research has found that as the main source of energy for electric new energy vehicles during driving, the power battery is called the "heart" of the electric vehicle. With the rapid development of electric new energy vehicles, it is very important to improve the fast charging performance of the battery. The operating temperature of the power battery in the vehicle is one of the important indicators affecting the fast charging performance of the battery. When the operating temperature is too high, it will cause problems such as limited fast charging performance and accelerated battery aging, reducing the battery life and thus affecting the cruising range of the electric vehicle; in addition, high temperature will not only reduce the working efficiency of the power battery, but also reduce the safety of the vehicle.

[0028] For example, when the operating temperature of the power battery is too high, if the heat in the power battery pack is not dissipated in time, the power battery under high heat is prone to uncontrollable dangerous conditions, and heat diffusion accidents are very likely to occur, affecting the safety of the passenger compartment and even causing serious safety accidents.

[0029] At present, the methods for cooling power batteries in vehicles mainly include air cooling, liquid cooling and phase change material cooling. Air cooling mainly relies on air flow to allow lower temperature air to flow through the surface of the power battery to exchange heat with the battery, taking away the heat generated by the power battery, and using this cycle to continuously cool the battery pack; liquid cooling mainly relies on the cooling liquid medium to directly or indirectly contact the power battery for cooling; phase change material cooling mainly utilizes the characteristics of phase change materials to absorb the heat of the power battery when it mainly changes from liquid phase to gas phase.

[0030] Among them, although air cooling has a lower structural cost, it is difficult to meet the heat dissipation requirements of high-temperature power batteries through natural air cooling, and the cooling effect is poor; the cost of phase change material cooling in actual application is high, and the material is heavy, which is not conducive to the mass production and development of power batteries; and with the improvement of battery integration methods and the emergence of new battery materials, traditional liquid cooling methods and equipment are difficult to meet the cooling needs of power batteries, reducing the cooling effect and stability of power batteries, and thus reducing the life and safety of power batteries.

[0031] Based on this, an embodiment of the present application provides a cooling control method for a power battery, which collects the operating temperature value of the power battery through a temperature collection device in the power battery cooling system, and determines the target operating temperature value of the power battery. According to the judgment result of whether the target operating temperature value is greater than the preset temperature value, the working mode of the liquid cooling device in the power battery cooling system is determined, and the liquid cooling device is controlled to cool the power battery according to the working mode, so that the operating temperature value of the power battery is stabilized within the preset temperature range, thereby improving the cooling effect and stability of the power battery, and thereby improving the life and safety of the power battery.

[0032] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of a power battery cooling system provided in an embodiment of the present application. Figure 1 As shown in , the power battery cooling system 10 includes a power battery cooling control device 600 , a liquid cooling device 110 and a temperature acquisition device 120 .

[0033] The cooling control device 600 and the temperature acquisition device 120 are respectively arranged on the surface of the power battery 20 , and the liquid cooling device 110 is connected to the power battery 20 .

[0034] Further, such as Figure 1 As shown in FIG, the liquid cooling device 110 includes an electric water pump 111 , a liquid medium cooler 112 and a battery cooling structure 113 .

[0035] The electric water pump 111 is connected to the power battery 20 and the liquid medium cooler 112 respectively, the liquid medium cooler 112 is connected to the power battery 20 , and the battery cooling structure 113 is provided at the cell position of the power battery 20 .

[0036] See also Figure 2 , Figure 2 This is a flow chart of a cooling control method for a power battery provided in an embodiment of the present application. Figure 2 As shown in , the cooling control method of the power battery provided in the embodiment of the present application is applied to Figure 1 The power battery cooling system shown in , the cooling control method includes: S101: In response to a vehicle equipped with a power battery having started a power battery cooling system, obtaining operating temperature values ​​of the power battery collected by a plurality of collection points in a temperature collection device.

[0037] See also Figure 3 , Figure 3 for Figure 3This is a schematic diagram of the structure of a temperature acquisition device provided in an embodiment of the present application. Figure 3 As shown in , the temperature collection device 120 is provided with multiple collection points 121, each collection point 121 is used to collect the operating temperature value of the power battery, and a target collection point 122 is set among the multiple collection points 121. The target collection point 122 is located at the center of the multiple collection points 121 and is used as a reference collection point for the multiple collection points 121.

[0038] In one embodiment of the present application, during specific implementation, step S101 may include: S1011: In response to a vehicle equipped with a power battery being in a startup state, obtain operating mode information of the vehicle.

[0039] In this step, when the vehicle provided with the power battery is in a starting state (eg, powered on or driven), the operating mode information sent by the VCU in the vehicle is obtained.

[0040] The working mode information includes but is not limited to the working modes and working information corresponding to each unit, module and system provided in the vehicle.

[0041] S1012: Based on the operating mode information, determine whether the power battery cooling system is allowed to be turned on.

[0042] In this step, the operating mode information of the power battery cooling system is determined in the operating mode information, and based on the operating mode information, it is determined whether the power battery cooling system is allowed to be turned on.

[0043] Furthermore, if the power battery cooling system is not allowed to be turned on, the power battery cooling system is not turned on.

[0044] S1013: If the power battery cooling system is allowed to be turned on, turn on the power battery cooling system, and obtain operating temperature values ​​of the power battery respectively collected by multiple collection points in the temperature collection device.

[0045] In this step, if it is determined that the power battery cooling system is allowed to be turned on, the power battery cooling system is turned on; and the operating temperature values ​​of the power battery are respectively collected by multiple collection points set by the temperature collection device to obtain multiple operating temperature values ​​of the power battery.

[0046] S102: Determine a target operating temperature value of the power battery based on the operating temperature value and the distance value between the collection points.

[0047] In the embodiment of the present application, according to the working characteristics of the power battery during operation, since the temperature collection device provided with the power battery has multiple collection points for collecting the working temperature, and the positions of the collection points are different, the collected working temperatures will have different degrees of differences. Only one of the working temperature values ​​cannot represent the working temperature of the power battery, and it is difficult to reflect the actual working temperature of the power battery.

[0048] In this way, taking into account the inconsistency of the temperatures collected at each collection point, corresponding weights are assigned to the multiple operating temperature values ​​of the power battery according to the distance between each collection point and the target collection point at the center, and then the sum of the weighted operating temperature values ​​is used as the target operating temperature value of the power battery.

[0049] In one embodiment of the present application, during specific implementation, step S102 may include: S1021: Determine a weight coefficient corresponding to each of the collection points based on the distance value between the collection points.

[0050] In the embodiment of the present application, the weight coefficient assigned to the operating temperature measured at each collection point is related to the straight-line distance from each collection point to a preset target collection point.

[0051] In one embodiment of the present application, during specific implementation, step S1021 may include: S10211. Obtain the distance values ​​corresponding to the location of each of the collection points and the location of a preset target collection point among the collection points, and determine the sum of the distance values ​​as a total distance value.

[0052] S10212: Determine a ratio of the distance value corresponding to each collection point to the total distance value as a weight coefficient corresponding to each collection point.

[0053] In this step, the expression for calculating the weight coefficient corresponding to each acquisition point is as follows.

[0054] .

[0055] in, Indicates the weight coefficient corresponding to each collection point, Indicates the distance value corresponding to the location of each of the collection points and the location of the preset target collection point among the collection points; Represents the sum of the distance values.

[0056] S1022: Multiply the operating temperature value collected at each collection point by the weight coefficient to obtain a product result, and determine the product result as a weighted temperature value corresponding to each collection point.

[0057] S1023: Determine the sum of the weighted temperature values ​​as the target operating temperature value of the power battery.

[0058] In this step, the expression for calculating the target operating temperature value of the power battery is as follows.

[0059] 。

[0060] in, Indicates the target operating temperature value of the power battery; Indicates the weight coefficient corresponding to each collection point; Indicates the operating temperature value of the power battery collected at each collection point.

[0061] S103: Determine whether the target operating temperature value is greater than a preset temperature value, obtain a determination result, and determine an operating mode of the liquid cooling device based on the determination result.

[0062] In this step, during specific implementation, first, the target operating temperature value and the preset temperature value are compared to determine whether the target operating temperature value is greater than the preset temperature value to obtain a judgment result; then, if the judgment result is yes, the first operating mode of the liquid cooling device is determined; finally, if the judgment result is no, the second operating mode of the liquid cooling device is determined.

[0063] In one embodiment of the present application, in a specific implementation, the step of determining the operating mode of the liquid cooling device based on the judgment result in step S103 may include: S1031. When the judgment result is that the target operating temperature value is greater than the preset temperature value, determine that the operating mode of the liquid cooling device is the first operating mode.

[0064] The first working mode indicates that the liquid cooling device dissipates the internal heat of the power battery in a timely manner.

[0065] In the embodiment of the present application, when the target operating temperature value is greater than the preset temperature value, it indicates that the current temperature inside the power battery is too high, and the heat inside the power battery needs to be promptly discharged to ensure that the power battery operates within the ideal preset temperature range.

[0066] S1032: When the judgment result is that the target operating temperature value is less than or equal to the preset temperature value, determine that the operating mode of the liquid cooling device is the second operating mode.

[0067] The second working mode indicates that the liquid cooling device dissipates the heat continuously generated by the power battery during operation.

[0068] In the embodiment of the present application, when the target operating temperature value is less than or equal to the preset temperature value, it means that although the current temperature inside the power battery meets the predetermined requirements, due to the operating characteristics of the power battery, the power battery will continue to generate heat during operation. It is necessary to promptly discharge the heat inside the power battery during the continuous heat generation process to ensure that the power battery operates stably within the ideal preset temperature range.

[0069] S104: Control the liquid cooling device to cool the power battery according to the operating mode, so that the target operating temperature value is stabilized within a preset temperature range.

[0070] In the embodiment of the present application, when the power battery is cooled by using a liquid cooling device, the liquid cooling device is as follows: Figure 1 The electric water pump 111 , the liquid medium cooler 112 and the battery cooling structure 113 shown in FIG perform liquid cooling on the power battery.

[0071] For further information, see Figure 4 , Figure 4 This is a schematic diagram of the external structure of a battery cooling structure provided in an embodiment of the present application. Figure 4 As shown in the figure, the exterior of the battery cooling structure 113 includes a first water inlet 1131, a second water inlet 1132, a third water outlet 1133 and a fourth water outlet 1134. The structure of two water inlets (1131 and 1132) and two water outlets (1133 and 1134) can quickly discharge the heat in the power battery, ensure the efficient operation of the power battery cooling system, ensure that the power battery works stably within the ideal preset temperature range, and improve the overall working performance of the power battery.

[0072] For further information, see Figure 5 , Figure 5 This is a schematic diagram of the internal structure of a battery cooling structure provided in an embodiment of the present application. Figure 5 As shown in , the battery cooling structure 113 includes a cooling mainboard 1135 and a liquid medium pipeline 1136 , and the cooling mainboard 1135 and the liquid medium pipeline 1136 are used to cool the battery cells 21 in the power battery 20 .

[0073] Among them, a cooling mainboard 1135 is set at the two large end surfaces corresponding to each battery cell 21 in the power battery 20, and at least one cooling mainboard 1135 is set between any two adjacent battery cells 21. Each cooling mainboard 1135 is provided with a fluid channel for coolant to flow through, and the liquid medium pipeline 1136 includes two cooling medium inlet pipes and two cooling medium outlet pipes. Both ends of each cooling mainboard 1135 are connected to the cooling medium inlet pipe and the cooling medium outlet pipe in the liquid medium pipeline 1136. The liquid medium pipeline 1136 is also provided with a connecting channel for connecting the fluid channel of the cooling mainboard 1135 with an external device.

[0074] In one embodiment of the present application, during specific implementation, step S104 may include: S1041. When it is determined that the operating mode is the first operating mode, control the liquid cooling device to continuously cool the power battery at a first operating power until the cooling duration reaches a first preset operating time.

[0075] In this step, when it is determined that the working mode of the liquid cooling device is the first working mode, the electric water pump in the liquid cooling device is controlled to operate at a first operating working power, and the liquid medium cooler is controlled to operate at a first cooling working power to cool the power battery until the duration of cooling the power battery by the electric water pump and the liquid medium cooler reaches a first preset working time.

[0076] S1042: When it is determined that the operating mode is the second operating mode, control the liquid cooling device to intermittently cool the power battery multiple times at a second operating power until the cooling duration reaches a second preset operating time, and then stop cooling.

[0077] The duration of each cooling is the preset interval time.

[0078] In this step, when it is determined that the working mode of the liquid cooling device is the second working mode, the electric water pump in the liquid cooling device is controlled to run intermittently at the second operating working power, and the duration of each intermittent operation is the preset intermittent time, and the liquid medium cooler is controlled to run intermittently at the second cooling working power, and the duration of each intermittent operation is the preset intermittent time, until the total working time corresponding to the electric water pump and the liquid medium cooler reaches the second preset working time, and then the cooling is stopped.

[0079] The cooling control method for a power battery provided in an embodiment of the present application collects the operating temperature value of the power battery through a temperature collection device in the power battery cooling system, and determines the target operating temperature value of the power battery. Based on the judgment result of whether the target operating temperature value is greater than a preset temperature value, the operating mode of the liquid cooling device in the power battery cooling system is determined, and the liquid cooling device is controlled to cool the power battery according to the operating mode, so that the operating temperature value of the power battery is stabilized within the preset temperature range, thereby improving the cooling effect and stability of the power battery, and thereby improving the life and safety of the power battery.

[0080] See also Figure 6 , Figure 6 This is a schematic diagram of the structure of a cooling control device for a power battery provided in an embodiment of the present application. Figure 6 As shown in FIG, the cooling control device 600 includes: a temperature acquisition module 610 for acquiring operating temperature values ​​of the power battery collected by a plurality of collection points in a temperature acquisition device in response to a power battery cooling system being turned on in a vehicle equipped with the power battery; a temperature determination module 620, configured to determine a target operating temperature value of the power battery based on the operating temperature value and the distance value between the collection points; The temperature determination module 630 is configured to determine whether the target operating temperature is greater than a preset temperature, obtain a determination result, and determine an operating mode of the liquid cooling device based on the determination result; The cooling control module 640 is configured to control the liquid cooling device to cool the power battery according to the operating mode, so that the target operating temperature value is stabilized within a preset temperature range.

[0081] Furthermore, when the temperature acquisition module 610 is configured to obtain the operating temperature values ​​of the power battery respectively collected by the multiple collection points in the temperature acquisition device in response to the vehicle in which the power battery is installed having turned on the power battery cooling system, the temperature acquisition module 610 is configured to: In response to a vehicle provided with a power battery being in a start-up state, obtaining operating mode information of the vehicle; Based on the operating mode information, determining whether the power battery cooling system is allowed to be turned on; If the power battery cooling system is allowed to be turned on, the power battery cooling system is turned on, and the operating temperature values ​​of the power battery respectively collected by multiple collection points in the temperature collection device are obtained.

[0082] Furthermore, when the temperature determination module 620 is used to determine the target operating temperature value of the power battery based on the operating temperature value and the distance value between the collection point, the temperature determination module 620 is used to: Determining a weight coefficient corresponding to each of the collection points based on the distance value between the collection points; Multiplying the operating temperature value collected at each collection point by the weight coefficient to obtain a product result, and determining the product result as the weighted temperature value corresponding to each collection point; The sum of the weighted temperature values ​​is determined as the target operating temperature value of the power battery.

[0083] Furthermore, when the temperature determination module 620 is used to determine the weight coefficient corresponding to each of the collection points based on the distance value between the collection points, the temperature determination module 620 is used to: Obtaining the distance values ​​respectively corresponding to the location of each of the collection points and the location of a preset target collection point among the collection points, and determining the sum of the distance values ​​as a total distance value; The ratio of the distance value corresponding to each of the collection points to the total distance value is determined as a weight coefficient corresponding to each of the collection points.

[0084] Furthermore, when the temperature determination module 630 is used to determine the operating mode of the liquid cooling device based on the determination result, the temperature determination module 630 is used to: When the determination result is that the target operating temperature value is greater than the preset temperature value, determining that the operating mode of the liquid cooling device is a first operating mode; wherein the first operating mode indicates that the liquid cooling device dissipates the internal heat of the power battery in a timely manner; When the judgment result is that the target operating temperature value is less than or equal to the preset temperature value, the operating mode of the liquid cooling device is determined to be the second operating mode; wherein, the second operating mode indicates that the liquid cooling device dissipates the heat continuously generated by the power battery during operation.

[0085] Furthermore, when the cooling control module 640 is used to control the liquid cooling device to cool the power battery according to the working mode, the cooling control module 640 is used to: When it is determined that the operating mode is the first operating mode, controlling the liquid cooling device to continuously cool the power battery at a first operating power until a cooling duration reaches a first preset operating time; When it is determined that the operating mode is the second operating mode, the liquid cooling device is controlled to intermittently cool the power battery multiple times at a second operating power until the cooling duration reaches a second preset operating time; wherein the duration of each cooling is the preset intermittent time.

[0086] The cooling control device for a power battery provided in an embodiment of the present application collects the operating temperature value of the power battery through a temperature collection device in the power battery cooling system, and determines a target operating temperature value of the power battery. Based on a judgment result of whether the target operating temperature value is greater than a preset temperature value, the device determines the operating mode of a liquid cooling device in the power battery cooling system, and controls the liquid cooling device to cool the power battery according to the operating mode, so that the operating temperature value of the power battery is stabilized within a preset temperature range, thereby improving the cooling effect and stability of the power battery, and thereby improving the life and safety of the power battery.

[0087] The present application also provides a power battery cooling system, including: a power battery cooling control device, a liquid cooling device and a temperature acquisition device. The power battery cooling system performs the above-mentioned Figure 2 The steps of the power battery cooling control method in the method embodiment are shown.

[0088] The embodiment of the present application also provides a vehicle, which is provided with the above-mentioned Figure 1 The power battery cooling system shown.

[0089] See also Figure 7 , Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 7 As shown in FIG, the electronic device 700 includes a processor 710 , a memory 720 and a bus 730 .

[0090] The memory 720 stores machine-readable instructions executable by the processor 710. When the electronic device 700 is running, the processor 710 communicates with the memory 720 via the bus 730. When the machine-readable instructions are executed by the processor 710, the above-mentioned Figure 2 The specific implementation of the steps of the power battery cooling control method in the method embodiment shown can be found in the method embodiment, and will not be repeated here.

[0091] The embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the computer program can execute the above-mentioned Figure 2 The specific implementation of the steps of the power battery cooling control method in the method embodiment shown can be found in the method embodiment, and will not be repeated here.

[0092] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0093] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interface, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0094] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0095] In addition, each functional unit in each embodiment of the present application 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.

[0096] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. 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.

[0097] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-mentioned embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A cooling control method for a power battery, characterized in that: The cooling control method is applied to a power battery cooling system; wherein the power battery cooling system includes a liquid cooling device and a temperature acquisition device, and the cooling control method includes: In response to a vehicle in which a power battery is provided having started the power battery cooling system, obtaining operating temperature values ​​of the power battery respectively collected by a plurality of collection points in the temperature collection device; determining a target operating temperature value of the power battery based on the operating temperature value and the distance value between the collection points; Determining whether the target operating temperature value is greater than a preset temperature value, obtaining a determination result, and determining an operating mode of the liquid cooling device based on the determination result; The liquid cooling device is controlled to cool the power battery according to the operating mode so that the target operating temperature value is stabilized within a preset temperature range.

2. The method according to claim 1, characterized in that The step of obtaining the operating temperature values ​​of the power battery respectively collected by a plurality of collection points in the temperature collection device in response to the vehicle in which the power battery is provided having started the power battery cooling system comprises: In response to a vehicle provided with a power battery being in a start-up state, obtaining operating mode information of the vehicle; Based on the operating mode information, determining whether the power battery cooling system is allowed to be turned on; If the power battery cooling system is allowed to be turned on, the power battery cooling system is turned on, and the operating temperature values ​​of the power battery respectively collected by multiple collection points in the temperature collection device are obtained.

3. The method according to claim 1, characterized in that The determining the target operating temperature value of the power battery based on the operating temperature value and the distance value between the collection points includes: Determining a weight coefficient corresponding to each of the collection points based on the distance value between the collection points; Multiplying the operating temperature value collected at each collection point by the weight coefficient to obtain a product result, and determining the product result as the weighted temperature value corresponding to each collection point; The sum of the weighted temperature values ​​is determined as the target operating temperature value of the power battery.

4. The method according to claim 3, characterized in that The determining of the weight coefficient corresponding to each of the collection points based on the distance value between the collection points includes: Obtaining the distance values ​​respectively corresponding to the location of each of the collection points and the location of a preset target collection point among the collection points, and determining the sum of the distance values ​​as a total distance value; The ratio of the distance value corresponding to each of the collection points to the total distance value is determined as a weight coefficient corresponding to each of the collection points.

5. The method according to claim 1, wherein Determining the operating mode of the liquid cooling device based on the judgment result includes: When the determination result is that the target operating temperature value is greater than the preset temperature value, determining that the operating mode of the liquid cooling device is a first operating mode; wherein the first operating mode indicates that the liquid cooling device dissipates the internal heat of the power battery in a timely manner; When the judgment result is that the target operating temperature value is less than or equal to the preset temperature value, the operating mode of the liquid cooling device is determined to be the second operating mode; wherein, the second operating mode indicates that the liquid cooling device dissipates the heat continuously generated by the power battery during operation.

6. The method according to claim 1, characterized in that The controlling the liquid cooling device to cool the power battery according to the working mode includes: When it is determined that the operating mode is the first operating mode, controlling the liquid cooling device to continuously cool the power battery at a first operating power until a cooling duration reaches a first preset operating time; When it is determined that the working mode is the second working mode, the liquid cooling device is controlled to intermittently cool the power battery multiple times at a second working power until the cooling duration reaches a second preset working time; wherein the duration of each cooling is the preset intermittent time.

7. A cooling control device for a power battery, characterized in that: The cooling control device comprises: a temperature acquisition module, configured to acquire operating temperature values ​​of the power battery respectively acquired by a plurality of acquisition points in a temperature acquisition device in response to a power battery cooling system being activated in a vehicle equipped with the power battery; a temperature determination module, configured to determine a target operating temperature value of the power battery based on the operating temperature value and the distance value between the collection points; a temperature judgment module, configured to judge whether the target operating temperature value is greater than a preset temperature value, obtain a judgment result, and determine an operating mode of the liquid cooling device based on the judgment result; A cooling control module is used to control the liquid cooling device to cool the power battery according to the working mode, so that the target operating temperature value is stabilized within a preset temperature range.

8. A power battery cooling system, characterized in that: include: A power battery cooling control device, a liquid cooling device, and a temperature acquisition device. The power battery cooling system performs the steps of the power battery cooling control method according to any one of claims 1 to 6 during operation.

9. A vehicle, characterized in that: The vehicle is provided with the power battery cooling system according to claim 8.

10. An electronic device, characterized in that: include: A processor, a memory, and a bus, wherein the memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor and the memory communicate through the bus. When the machine-readable instructions are run by the processor, the steps of the power battery cooling control method as described in any one of claims 1 to 6 are executed.

11. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the power battery cooling control method according to any one of claims 1 to 6 are executed.

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