Control method, device and equipment of power battery temperature equalizing system and medium

Abstract

The invention provides a control method, device, equipment and medium for a power battery temperature equalizing system, the power battery temperature equalizing system comprises a plurality of temperature equalizing assemblies, the temperature equalizing assemblies are placed between two battery cells along the height direction of the battery cells, and the temperature equalizing assemblies are arranged between the two battery cells under the condition that a battery pack in a power battery has a temperature equalizing requirement. The method comprises the following steps: acquiring an environment temperature value, a bus current value in a set time length and a current residual capacity value of a battery pack, determining a power level of a temperature equalizing system according to the environment temperature value, the bus current value in the set time length and the current residual capacity value, and then controlling a temperature equalizing assembly according to the determined power level so as to regulate and control the temperature of the battery pack. According to the method, a plurality of factors such as an environment temperature value, a bus current value in a set time length and a current residual capacity value of a battery pack are comprehensively considered to determine a power level of a temperature equalizing system, and a temperature equalizing assembly is controlled according to the determined power level, so that accurate regulation and control of the temperature of the battery pack are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a control method, device, equipment and medium for a power battery temperature equalization system. Background Art

[0002] With the rapid development of electric vehicles and energy storage systems, the performance and safety of power batteries have become the focus of the industry. During the charging and discharging process of power batteries, the uneven chemical reaction inside the battery cells and the influence of external environmental factors will cause temperature differences between the battery cells. This temperature difference will not only affect the performance of the battery and shorten the battery life, but may also cause safety problems such as thermal runaway. Therefore, the research and development and application of power battery temperature equalization systems are particularly important. Summary of the invention

[0003] The present invention aims to solve the technical problems in the related art to a certain extent.

[0004] To this end, the first purpose of the present invention is to propose a control method for a power battery temperature equalization system. The method determines the power level of the temperature equalization system by comprehensively considering multiple factors such as the ambient temperature value, the bus current value within a set time, and the current remaining capacity value of the battery pack, and controls the temperature equalization component according to the determined power level to achieve precise control of the battery pack temperature.

[0005] A second objective of the present invention is to provide a control device for a power battery temperature equalization system.

[0006] A third objective of the present invention is to provide an electronic device.

[0007] A fourth object of the present invention is to provide a computer-readable storage medium.

[0008] To achieve the above-mentioned purpose, an embodiment of the first aspect of the present invention proposes a control method for a power battery temperature equalization system, wherein the power battery temperature equalization system includes multiple temperature equalization components, and the temperature equalization components are placed between two battery cells along the height direction of the battery cells. The method includes: in response to a temperature equalization requirement for a battery pack in a power battery, obtaining an ambient temperature value, a bus current value within a set time period, and a current remaining capacity value of the battery pack; wherein the bus current value is used to characterize the current value flowing through the bus connecting the battery pack with an external load or a charging device; determining a power level of the temperature equalization system according to the ambient temperature value, the bus current value within the set time period, and the current remaining capacity value; and controlling the temperature equalization component according to the determined power level to achieve temperature regulation of the battery pack.

[0009] According to an embodiment of the present invention, the power battery temperature equalization system includes multiple temperature equalization components, which are placed between two battery cells along the height direction of the battery cell. When the battery pack in the power battery has a temperature equalization requirement, the ambient temperature value, the bus current value within the set time length, and the current remaining capacity value of the battery pack are obtained. The bus current value is used to characterize the current value flowing through the bus connecting the battery pack and the external load or charging device, and the power level of the temperature equalization system is determined according to the ambient temperature value, the bus current value within the set time length, and the current remaining capacity value, and then the temperature equalization component is controlled according to the determined power level to achieve the regulation of the battery pack temperature. Therefore, the method determines the power level of the temperature equalization system by comprehensively considering multiple factors such as the ambient temperature value, the bus current value within the set time length, and the current remaining capacity value of the battery pack, and controls the temperature equalization component according to the determined power level to achieve precise regulation of the battery pack temperature.

[0010] In addition, the control method of the power battery temperature equalization system provided in the first aspect of the present invention may also have the following additional technical features:

[0011] According to one embodiment of the present invention, the method further includes:

[0012] Obtaining temperature values ​​of multiple battery cells in the battery pack;

[0013] Determining a temperature peak value and a temperature valley value from the temperature values ​​of the plurality of battery cells;

[0014] Determining whether the battery pack needs to have an average temperature according to the temperature peak value and the temperature valley value;

[0015] In which, in response to the temperature valley value being greater than the first set temperature value, it is determined that the battery pack has a temperature equalization requirement, and the type of the temperature equalization requirement is a cooling temperature equalization requirement;

[0016] In response to the temperature peak being less than a second set temperature value, determining that the battery pack has a temperature equalization requirement, and the type of the temperature equalization requirement is a heating temperature equalization requirement;

[0017] In response to the temperature valley value being less than or equal to the first set temperature value, and the temperature peak value being greater than or equal to the second set temperature value, determining that the battery pack has no temperature equalization requirement;

[0018] Wherein, the first set temperature value is greater than the second set temperature value.

[0019] According to an embodiment of the present invention, determining the power level of the temperature equalization system according to the ambient temperature value, the bus current value within the set time, and the current remaining capacity value includes:

[0020] Calculate the root mean square value of the bus current value within the set time length;

[0021] Calculating a ratio between the root mean square value and the current remaining capacity value;

[0022] The power level of the temperature equalization system is determined according to the ambient temperature value and the ratio.

[0023] According to an embodiment of the present invention, the type of the temperature equalization requirement is a cooling temperature equalization requirement, and determining the power level of the temperature equalization system according to the ambient temperature value and the ratio includes:

[0024] In response to the ambient temperature value being less than or equal to a third set temperature value, if the ratio is less than or equal to a first set value, determining that the power level of the temperature equalization system is a first power level;

[0025] In response to the ambient temperature value being less than or equal to the third set temperature value, if the set ratio value is greater than the first set value, obtaining a speed value of a compressor in the power battery temperature equalization system, and determining a power level of the temperature equalization system according to the speed value of the compressor;

[0026] In response to the ambient temperature value being less than or equal to the fourth set temperature and greater than the third set temperature value, if the ratio is greater than the second set value, obtaining the speed value of the compressor, and determining the power level of the temperature equalization system according to the speed value of the compressor;

[0027] In response to the ambient temperature value being greater than the fourth set temperature, determining the power level of the temperature equalization system to be a second power level;

[0028] The power corresponding to the first power level is less than the power corresponding to the second power level.

[0029] According to an embodiment of the present invention, determining the power level of the temperature equalization system according to the rotation speed value of the compressor includes:

[0030] If the speed value of the compressor is greater than the first set speed value, determining that the power level of the temperature equalization system is the third power level;

[0031] If the speed value of the compressor is less than or equal to the first set speed value, determining that the power level of the temperature equalization system is the first power level;

[0032] If the speed value of the compressor is greater than the second set speed value, determining the power level of the temperature equalization system to be the second power level;

[0033] If the speed value of the compressor is less than or equal to the second set speed value, determining the power level of the temperature equalization system to be the third power level;

[0034] The power corresponding to the first power level is smaller than the power corresponding to the third power level, and the power corresponding to the third power level is smaller than the power corresponding to the second power level.

[0035] According to an embodiment of the present invention, the type of temperature equalization requirement is heating temperature equalization requirement, and determining the power level of the temperature equalization system according to the ambient temperature value and the ratio includes:

[0036] In response to the ambient temperature value being greater than or equal to a fifth set temperature value, if the ratio is less than or equal to a third set value, determining that the power level of the temperature equalization system is a fourth power level;

[0037] In response to the ambient temperature value being greater than or equal to the fifth set temperature value, if the ratio is greater than the third set value, obtaining a speed value of a compressor in the power battery temperature equalization system and a gear position of a heating film in the temperature equalization component, and determining a power level of the temperature equalization system according to the speed value of the compressor and the gear position of the heating film;

[0038] In response to the ambient temperature value being greater than or equal to the sixth set temperature and less than the fifth set temperature value, if the ratio is greater than the fourth set value, obtaining the speed value of the compressor and the gear position of the heating film, and determining the power level of the temperature equalization system according to the speed value of the compressor and the gear position of the heating film;

[0039] In response to the ambient temperature value being less than the sixth set temperature T1, determining the power level of the temperature equalization system to be the fifth power level;

[0040] The power corresponding to the fourth power level is less than the power corresponding to the fifth power level.

[0041] According to an embodiment of the present invention, determining the power level of the temperature equalization system according to the rotation speed value of the compressor and the gear position of the heating film includes:

[0042] If the speed value of the compressor is greater than the first set speed value or the gear position of the heating film is the first set gear position, determining that the power level of the temperature equalization system is the fourth power level;

[0043] If the speed value of the compressor is less than or equal to the first set speed value and the gear position of the heating film is not the first set gear position, determining that the power level of the temperature equalization system is the sixth power level;

[0044] If the speed value of the compressor is greater than the second set speed value or the gear position of the heating film is the second set gear position, determining the power level of the temperature equalization system to be the fifth power level;

[0045] If the speed value of the compressor is less than or equal to the second set speed value and the gear position of the heating film is not the second set gear position, determining that the power level of the temperature equalization system is the sixth power level;

[0046] The power corresponding to the fourth power level is smaller than the power corresponding to the sixth power level, and the power corresponding to the sixth power level is smaller than the power corresponding to the fifth power level.

[0047] To achieve the above-mentioned purpose, the second aspect of the embodiment of the present invention proposes a control device for a power battery temperature equalization system, wherein the power battery temperature equalization system includes multiple temperature equalization components, and the temperature equalization component is placed between two battery cells along the height direction of the battery cells. The device includes: an acquisition module, used to respond to the temperature equalization requirement of the battery pack in the power battery, to obtain the ambient temperature value, the bus current value within a set time length and the current remaining capacity value of the battery pack; wherein the bus current value is used to characterize the current value flowing through the bus connecting the battery pack with an external load or a charging device; a determination module, used to determine the power level of the temperature equalization system according to the ambient temperature value, the bus current value within the set time length and the current remaining capacity value; a control module, used to control the temperature equalization component according to the determined power level, so as to achieve regulation of the battery pack temperature.

[0048] According to the control device of the power battery temperature equalization system of the embodiment of the present invention, the acquisition module obtains the ambient temperature value, the bus current value within the set time and the current remaining capacity value of the battery pack when the battery pack in the power battery has a temperature equalization requirement. The bus current value is used to characterize the current value flowing through the bus connecting the battery pack and the external load or charging device. The power level of the temperature equalization system is determined by the determination module according to the ambient temperature value, the bus current value within the set time and the current remaining capacity value. The temperature equalization component is controlled by the control module according to the determined power level to achieve the regulation of the battery pack temperature. Therefore, the device determines the power level of the temperature equalization system by comprehensively considering multiple factors such as the ambient temperature value, the bus current value within the set time and the current remaining capacity value of the battery pack, and controls the temperature equalization component according to the determined power level to achieve the precise regulation of the battery pack temperature.

[0049] In addition, the control device of the power battery temperature equalization system provided in the second aspect of the present invention may also have the following additional technical features:

[0050] According to one embodiment of the present invention, the device further includes:

[0051] A judgment module, used for obtaining temperature values ​​of a plurality of battery cells in the battery pack, and determining a temperature peak value and a temperature valley value from the temperature values ​​of the plurality of battery cells, and judging whether the battery pack has a temperature equalization requirement according to the temperature peak value and the temperature valley value;

[0052] In which, in response to the temperature valley value being greater than the first set temperature value, it is determined that the battery pack has a temperature equalization requirement, and the type of the temperature equalization requirement is a cooling temperature equalization requirement;

[0053] In response to the temperature peak being less than a second set temperature value, determining that the battery pack has a temperature equalization requirement, and the type of the temperature equalization requirement is a heating temperature equalization requirement;

[0054] In response to the temperature valley value being less than or equal to the first set temperature value, and the temperature peak value being greater than or equal to the second set temperature value, determining that the battery pack has no temperature equalization requirement;

[0055] Wherein, the first set temperature value is greater than the second set temperature value.

[0056] According to one embodiment of the present invention, when the determination module is used to determine the power level of the temperature equalization system according to the ambient temperature value, the bus current value within the set time length, and the current remaining capacity value, it includes:

[0057] Calculate the root mean square value of the bus current value within the set time length;

[0058] Calculating a ratio between the root mean square value and the current remaining capacity value;

[0059] The power level of the temperature equalization system is determined according to the ambient temperature value and the ratio.

[0060] According to an embodiment of the present invention, the type of the temperature equalization requirement is a cooling temperature equalization requirement, and determining the power level of the temperature equalization system according to the ambient temperature value and the ratio includes:

[0061] In response to the ambient temperature value being less than or equal to a third set temperature value, if the ratio is less than or equal to a first set value, determining that the power level of the temperature equalization system is a first power level;

[0062] In response to the ambient temperature value being less than or equal to the third set temperature value, if the set ratio value is greater than the first set value, obtaining a speed value of a compressor in the power battery temperature equalization system, and determining a power level of the temperature equalization system according to the speed value of the compressor;

[0063] In response to the ambient temperature value being less than or equal to the fourth set temperature and greater than the third set temperature value, if the ratio is greater than the second set value, obtaining the speed value of the compressor, and determining the power level of the temperature equalization system according to the speed value of the compressor;

[0064] In response to the ambient temperature value being greater than the fourth set temperature, determining the power level of the temperature equalization system to be a second power level;

[0065] The power corresponding to the first power level is less than the power corresponding to the second power level.

[0066] According to an embodiment of the present invention, when the determination module is used to determine the power level of the temperature equalization system according to the rotation speed value of the compressor, it includes:

[0067] If the speed value of the compressor is greater than the first set speed value, determining that the power level of the temperature equalization system is the third power level;

[0068] If the speed value of the compressor is less than or equal to the first set speed value, determining that the power level of the temperature equalization system is the first power level;

[0069] If the speed value of the compressor is greater than the second set speed value, determining the power level of the temperature equalization system to be the second power level;

[0070] If the speed value of the compressor is less than or equal to the second set speed value, determining the power level of the temperature equalization system to be the third power level;

[0071] The power corresponding to the first power level is smaller than the power corresponding to the third power level, and the power corresponding to the third power level is smaller than the power corresponding to the second power level.

[0072] According to an embodiment of the present invention, the type of the temperature equalization requirement is a heating temperature equalization requirement, and the determination module is used to determine the power level of the temperature equalization system according to the ambient temperature value and the ratio, including:

[0073] In response to the ambient temperature value being greater than or equal to a fifth set temperature value, if the ratio is less than or equal to a third set value, determining that the power level of the temperature equalization system is a fourth power level;

[0074] In response to the ambient temperature value being greater than or equal to the fifth set temperature value, if the ratio is greater than the third set value, obtaining a speed value of a compressor in the power battery temperature equalization system and a gear position of a heating film in the temperature equalization component, and determining a power level of the temperature equalization system according to the speed value of the compressor and the gear position of the heating film;

[0075] In response to the ambient temperature value being greater than or equal to the sixth set temperature and less than the fifth set temperature value, if the ratio is greater than the fourth set value, obtaining the speed value of the compressor and the gear position of the heating film, and determining the power level of the temperature equalization system according to the speed value of the compressor and the gear position of the heating film;

[0076] In response to the ambient temperature value being less than the sixth set temperature T1, determining the power level of the temperature equalization system to be the fifth power level;

[0077] The power corresponding to the fourth power level is less than the power corresponding to the fifth power level.

[0078] According to an embodiment of the present invention, when the determination module is used to determine the power level of the temperature equalization system according to the speed value of the compressor and the gear position of the heating film, it includes:

[0079] If the speed value of the compressor is greater than the first set speed value or the gear position of the heating film is the first set gear position, determining that the power level of the temperature equalization system is the fourth power level;

[0080] If the speed value of the compressor is less than or equal to the first set speed value and the gear position of the heating film is not the first set gear position, determining that the power level of the temperature equalization system is the sixth power level;

[0081] If the speed value of the compressor is greater than the second set speed value or the gear position of the heating film is the second set gear position, determining the power level of the temperature equalization system to be the fifth power level;

[0082] If the speed value of the compressor is less than or equal to the second set speed value and the gear position of the heating film is not the second set gear position, determining that the power level of the temperature equalization system is the sixth power level;

[0083] The power corresponding to the fourth power level is smaller than the power corresponding to the sixth power level, and the power corresponding to the sixth power level is smaller than the power corresponding to the fifth power level.

[0084] To achieve the above object, the third aspect of the present invention further provides an electronic device, including:

[0085] at least one processor; and,

[0086] a memory communicatively connected to the at least one processor; wherein,

[0087] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the above-mentioned control method of the power battery temperature equalization system.

[0088] The electronic device of the embodiment of the present invention, by executing the above-mentioned control method of the power battery temperature equalization system, determines the power level of the temperature equalization system by comprehensively considering multiple factors such as the ambient temperature value, the bus current value within a set time, and the current remaining capacity value of the battery pack, and controls the temperature equalization component according to the determined power level to achieve precise regulation of the battery pack temperature.

[0089] To achieve the above-mentioned purpose, the fourth aspect of the present invention further proposes a computer-readable storage medium on which computer program instructions are stored. When the program instructions are executed by a processor, the control method of the power battery temperature equalization system is implemented.

[0090] The control method of the power battery temperature equalizing system of the embodiment of the present invention determines the power level of the temperature equalizing system by executing the above-mentioned control method of the power battery temperature equalizing system by comprehensively considering multiple factors such as the ambient temperature value, the bus current value within a set time period, and the current remaining capacity value of the battery pack, and controls the temperature equalizing component according to the determined power level to achieve precise regulation of the battery pack temperature.

[0091] In order to achieve the above-mentioned purpose, the fifth aspect of the present invention further proposes a computer program product, which, when the instruction processor in the computer program product is executed, executes the above-mentioned control method of the power battery temperature equalization system.

[0092] The computer program product of the embodiment of the present invention determines the power level of the temperature equalization system by executing the above-mentioned control method of the power battery temperature equalization system by comprehensively considering multiple factors such as the ambient temperature value, the bus current value within a set time period, and the current remaining capacity value of the battery pack, and controls the temperature equalization component according to the determined power level to achieve precise regulation of the battery pack temperature.

[0093] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0094] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0095] Figure 1 It is a three-dimensional diagram of a power battery temperature equalizing assembly of the present invention;

[0096] Figure 2 It is an exploded view of a power battery temperature equalizing assembly of the present invention;

[0097] Figure 3 is a cross-sectional view of a temperature homogenizing plate of the present invention;

[0098] Figure 4It is a schematic structural diagram of the heating film of the present invention;

[0099] Figure 5 is a three-dimensional diagram of another power battery temperature equalizing assembly of the present invention;

[0100] Figure 6 is an exploded view of another power battery temperature equalizing assembly of the present invention;

[0101] Figure 7 It is a structural schematic diagram of a battery module of the present invention;

[0102] Figure 8 It is an exploded diagram of the battery cell and the power battery temperature equalizing assembly of the present invention;

[0103] Fig. 9 It is a structural schematic diagram of the battery module of the present invention (without the battery core);

[0104] Fig.10 is a schematic structural diagram of a battery pack of the present invention;

[0105] Fig.11 is an exploded view of the battery pack of the present invention;

[0106] Fig.12 It is a structural schematic diagram of the battery box of the present invention;

[0107] Fig.13 It is a schematic diagram of the flow of the temperature-equalizing medium from the battery box to the temperature-equalizing plate of the present invention;

[0108] Fig.14 is a schematic diagram of the flow of liquid cooling / direct cooling medium at the bottom of the battery box of the present invention;

[0109] Fig.15 is a schematic diagram of a power battery temperature equalization system of the present invention;

[0110] Fig.16 It is a low voltage connection block diagram of the power battery temperature equalization system of the present invention;

[0111] Fig.17 It is a high voltage connection block diagram of the power battery temperature equalization system of the present invention;

[0112] Fig.18 This is a water circuit / refrigerant pipeline connection block diagram of the power battery temperature equalization system of the present invention;

[0113] Fig.19 is a flow chart of a control method of a power battery temperature equalization system of the present invention;

[0114] Fig. 20 is a flow chart of determining whether a battery has a temperature equalization requirement according to the present invention;

[0115] Fig.21is a flow chart of cooling temperature uniformity requirement judgment of the present invention;

[0116] Fig. 22 It is a flow chart of the heating temperature uniformity requirement judgment of the present invention;

[0117] Fig.23 It is a block diagram of a control device of a power battery temperature equalization system of the present invention.

[0118] Description of reference numerals: 1-temperature averaging plate, 2-heating film, 3-insulating sheet;

[0119] 100-power battery temperature equalizing assembly, 200-end plate, 300-battery cell, 400-cable tie, 500-battery box;

[0120] 11- medium flow channel, 111- sealing cavity, 112- spacer, 113- first gap, 114- second gap, 12- first side surface, 13- second side surface;

[0121] 21-heating body, 22-wiring harness, 23-connector;

[0122] 510 - box body, 520 - first cross beam, 521 - medium inlet, 522 - medium outlet, 530 - second cross beam, 540 - longitudinal beam, 550 - first pipeline, 560 - second pipeline. DETAILED DESCRIPTION

[0123] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0124] The following describes a control method, device, equipment and medium for a power battery temperature equalization system according to an embodiment of the present invention with reference to the accompanying drawings.

[0125] Before introducing the control method of the power battery temperature equalization system of the present invention, Figure 1-Figure 18 The power battery temperature equalizing assembly, battery module and battery pack of the present invention are introduced.

[0126] Reference Figure 1-Figure 6 As shown, in the first embodiment of the present invention, a power battery temperature equalization component is provided, which is placed between two battery cells along the height direction of the battery cell, and includes a temperature equalization plate 1, a heating film 2 and an insulating sheet 3, wherein:

[0127] A medium flow channel 11 is arranged in a winding manner along the length direction and the height direction inside the temperature averaging plate 1, and a heating film 2 is respectively attached to the first side surface 12 and the second side surface 13 of the temperature averaging plate 1;

[0128] The insulating sheet 3 is connected to and covers the first side surface 12 and the second side surface 13 , and is located between the temperature evaporating plate 1 and the battery cell.

[0129] It should be noted that the first side 12 and the second side 13 of the temperature equalizing plate 1 are respectively bonded and connected to the heating film 2, and the insulating sheet 3 is covered and connected to the first side 12 and the second side 13. After the assembly of the power battery temperature equalizing assembly is completed, one side of the power battery temperature equalizing assembly is bonded to a battery cell, and the other side is bonded to another battery cell, thereby achieving temperature uniformity of the battery cells in the height direction, and at the same time can assist in achieving temperature uniformity between different battery cells.

[0130] The power battery temperature equalizing assembly proposed in this embodiment is provided with a medium flow channel 11 coiled along the length direction and the height direction inside the temperature equalizing plate 1, and the first side surface 12 and the second side surface 13 of the temperature equalizing plate 1 are respectively bonded and connected with a heating film 2, so that the battery cells bonded on both sides of the power battery temperature equalizing assembly can be cooled and heated to avoid temperature difference of the battery cells in the vertical direction, achieve temperature equalization of the battery cells, and execute the charging and discharging strategy according to the top temperature of the battery cells, without damaging the performance and life of the battery cells.

[0131] In some embodiments, a sealed cavity 111 is provided inside the temperature equalizer 1, and a plurality of parallel partitions 112 are provided inside the sealed cavity 111, and the partitions 112 extend along the length direction of the temperature equalizer 1, and the plurality of partitions 112 separate the sealed cavity 111 to form a medium flow channel 11. The sealed cavity 111 is separated by a plurality of partitions 112 to form a medium flow channel 11, so that the medium flow channel 11 is arranged in a winding manner along the length direction and the height direction, so that the medium flows more evenly, and the temperature equalization effect on the battery cell is improved.

[0132] In some embodiments, two adjacent spacers 112, one end of one spacer 112 and the side of the sealed cavity 111 form a first gap 113, and the other spacer 112 forms a second gap 114 with the side of the sealed cavity 111 at the end away from the first gap 113, and the cross section of the medium flow channel 11 is S-shaped. Through the above structure, the medium flow channel 11 can form a "snake" shape connected end to end, the medium flow is more uniform, and the temperature equalization effect of the battery cell can be improved.

[0133] In some embodiments, Figure 5 and Figure 6As shown, the heating film 2 is attached to the top surface, the first side surface 12 and the second side surface 13 of the temperature averaging plate 1, the bottom of the heating film 2 is higher than the bottom surface of the temperature averaging plate 1, and the insulating sheet 3 is attached to the outside of the heating film 2 and attached to the first side surface 12 and the second side surface 13 of the temperature averaging plate 1. The heating film 2 is an integrated U-shaped structure, and the heating film 2 is inverted on the temperature averaging plate 1 to be attached to the top surface, the first side surface 12 and the second side surface 13 of the temperature averaging plate 1, the bottom of the heating film 2 is higher than the bottom surface of the temperature averaging plate 1, and the insulating sheet 3 is attached to the outside of the heating film 2 and attached to the first side surface 12 and the second side surface 13 of the temperature averaging plate 1. The area of ​​the temperature averaging plate 1 not covered by the heating film 2 is covered by the insulating sheet 3 to avoid the risk of short circuit between the battery cell and the temperature averaging plate 1, thereby improving the safety and reliability of the device.

[0134] In other embodiments, Figure 1 and Figure 2 As shown, two heating films 2 and two insulating sheets 3 are provided, one heating film 2 and one insulating sheet 3 are pasted to fill the first side 12, and another heating film 2 and another insulating sheet 3 are pasted to fill the first side 12 and the second side 13, and the insulating sheet 3 is located below the heating film 2. The first side 12 and the second side 13 are filled by piecing together the heating film 2 and the insulating sheet 3, and the insulating sheet 3 is located below the heating film 2, and the area of ​​the temperature averaging plate 1 not covered by the heating film 2 is covered by the insulating sheet 3, so as to avoid the risk of short circuit between the battery cell and the temperature averaging plate 1, and improve the safety and reliability of the device.

[0135] In some embodiments, the heating film 2 includes a heating body 21, two wiring harnesses 22 and two connectors 23. The two wiring harnesses 22 are respectively connected to the two ends of the length direction of the heating body 21, and the two ends of the wiring harnesses 22 are respectively connected to the heating body 21 and the connectors 23. The two wiring harnesses 22 are respectively connected to the two ends of the length direction of the heating body 21, and the two ends of the wiring harnesses 22 are respectively connected to the heating body 21 and the connectors 23. The two connectors 23 are respectively connected to the positive and negative poles of the power supply to realize the power supply of the heating film 2. The setting of the connectors 23 improves the convenience of connecting the heating film 2 to electricity, and is convenient for assembly and disassembly.

[0136] The working principle of the power battery temperature equalizing assembly is as follows: battery cells are respectively attached to both sides of the power battery temperature equalizing assembly, a medium flow channel 11 is arranged in a winding manner along the length direction and the height direction inside the temperature equalizing plate 1, and the battery cell is cooled by the medium in the medium flow channel 11. The first side surface 12 and the second side surface 13 of the temperature equalizing plate 1 are respectively attached and connected with a heating film 2. The battery cell is heated by the heating film 2, which can avoid temperature difference in the battery cell in the vertical direction, realize temperature equalization of the battery cell, and execute the charging and discharging strategy according to the top temperature of the battery cell, without damaging the performance and life of the battery cell.

[0137] Based on the same concept, the second embodiment of the present invention proposes a battery module, combined with Figure 7-9 As shown, it includes an end plate 200, a battery cell 300 and a power battery temperature equalizing assembly 100 of the first aspect, at least two rows of battery cells 300 are vertically fixed between the two end plates 200, and the two ends of the cable tie 400 are respectively connected to the two end plates 200, and the battery cell 300 is fixed by the cable tie 400. The power battery temperature equalizing assembly 100 is located between two adjacent rows of battery cells 300, and the two ends of the temperature equalizing plate 1 are respectively connected to the two end plates 200.

[0138] The battery module proposed in this embodiment can achieve temperature uniformity of the battery cell 300, and execute the charging and discharging strategy according to the top temperature of the battery cell 300, without damaging the performance and life of the battery cell 300; at the same time, the two ends of the temperature uniformity plate 1 are respectively connected to the two end plates 200, which can provide strength support for the battery module and reduce the reinforcement structure outside the module, such as the cable tie 400. The cable tie 400 can be changed from 2 to 1, and the width / strength of the cable tie 400 can be reduced, which can reduce the cost; in addition, the addition of the temperature uniformity component can appropriately reduce the operating power of the liquid cooling / direct cooling system, or shorten the operating time.

[0139] Based on the same concept, the third aspect of the present invention provides a battery pack, combined with Figure 10-14 As shown, it includes a battery box 500 and battery cells 300, and the power battery temperature equalizing assembly 100 of the first aspect, at least two rows of battery cells 300 are vertically fixed in the battery box 500, at least one surface of each row of battery cells 300 is in contact with the power battery temperature equalizing assembly 100, and both ends of the temperature equalizing plate 1 are respectively connected to the battery box 500.

[0140] It should be noted that a liquid cooling / direct cooling channel is provided at the bottom of the battery box 500 to perform liquid cooling or direct cooling on the bottom of the battery cell 300.

[0141] The battery pack provided in this embodiment can achieve temperature uniformity of the battery cell 300, and execute the charging and discharging strategy according to the top temperature of the battery cell 300, without damaging the performance and life of the battery cell 300; at the same time, the two ends of the temperature uniformity plate 1 are respectively connected to the battery box 500, which can provide strength support for the battery box 500, reduce the reinforcement structure of the battery box 500, and reduce the cost; in addition, the addition of the temperature uniformity component can appropriately reduce the operating power of the liquid cooling / direct cooling system, or shorten the operating time.

[0142] In some embodiments, the battery box 500 includes a box body 510, a first crossbeam 520, a second crossbeam 530 and two longitudinal beams 540. The first crossbeam 520 and the second crossbeam 530 are fixed at intervals at the bottom of the box body 510. The two ends of the longitudinal beam 540 are respectively connected to the first crossbeam 520 and the second crossbeam 530 vertically to form a square placement area for placing batteries. The two ends of the temperature plate 1 are respectively connected to the first crossbeam 520 and the second crossbeam 530. By connecting the two ends of the temperature plate 1 to the first crossbeam 520 and the second crossbeam 530, strength support is provided for the battery box 500, which can reduce the reinforcement structure of the battery box 500 and reduce costs.

[0143] In some embodiments, a first channel connected to the medium flow channel 11 is provided inside the first crossbeam 520, and a medium inlet 521 and a medium outlet 522 connected to the first channel are provided on the first crossbeam 520. The battery box 500 also includes a first pipe 550 and a second pipe 560. The first pipe 550 is connected to the medium inlet 521 and passes through the box body, and the second pipe 560 is connected to the medium outlet 522 and passes through the box body. A second channel connected to the medium flow channel 11 is provided inside the second crossbeam 530 to form a circulating temperature-averaging pipeline. The medium enters the medium inlet 521 from the first pipe 550, flows into the medium flow channel 11 from the first channel, returns to the first channel after circulation, and flows out of the medium outlet 522 with the second pipe 560 and is discharged. The medium can also circulate between the medium flow channels 11 of two adjacent temperature-averaging plates 1 from the second channel to form a circulating temperature-averaging pipeline, which can achieve temperature-averaging of the battery cell 300 in the height direction, and can also assist in achieving temperature-averaging between different battery cells 300.

[0144] In some embodiments, Fig.14 As shown, the liquid cooling / direct cooling channel at the bottom of the battery box 500 may also be S-shaped similar to the medium channel 11, which can improve the uniformity of cooling and improve reliability and stability.

[0145] Combine the following Figure 15-18 The power battery temperature equalization system of the present invention is introduced.

[0146] Fig.15 Schematic diagram of the power battery temperature equalization system of the present invention. Fig.15 As shown, the power battery temperature equalization system of the present invention includes: a battery pack, a vehicle liquid cooling / direct cooling system, a low-voltage power supply, a water pump, a water tank, a high-voltage distribution box PDU, and the battery pack contains multiple temperature equalization components (the temperature equalization components are composed of battery cells, heating films, and temperature equalization plates), a battery management system BMS, a battery distribution box BDU, and a liquid cooling / direct cooling plate. Other parts and units that are not directly related to the present invention are not described here.

[0147] The present invention adjusts the temperature difference of the battery cell body by adding a temperature averaging system (including a temperature averaging plate, a heating film, a water pump, a water tank, and related connecting pipes and joints).

[0148] Fig.16 is a low voltage connection block diagram of the power battery temperature equalization system of the present invention, such as Fig.16 As shown, the low-voltage connections between parts mainly include low-voltage power supply, communication, sampling, etc.

[0149] Fig.17 It is a high-voltage connection block diagram of the power battery temperature equalization system of the present invention. The high-voltage connection between the parts is mainly powered by a high-voltage power supply for energy transfer.

[0150] Fig.18 It is a block diagram of the water circuit / refrigerant pipeline connection of the power battery temperature equalization system of the present invention. The water circuit / refrigerant pipeline connection between parts is mainly to provide a flow boundary for the cooling medium. During the flow process, heat exchange is performed at the corresponding part positions.

[0151] Fig.19 4 is a flow chart of a method for controlling a power battery temperature equalization system according to an embodiment of the present invention.

[0152] like Fig.19 As shown, the control method of the power battery temperature equalization system according to the embodiment of the present invention comprises the following steps:

[0153] S1, in response to the battery pack in the power battery having a temperature equalization requirement, obtains the ambient temperature value, the bus current value within a set time, and the current remaining capacity value of the battery pack; wherein the bus current value is used to characterize the current value flowing through the bus connecting the battery pack with an external load or charging device.

[0154] Before executing step S1, first determine whether the battery pack in the power battery has a requirement for uniform temperature. The process of determining whether the battery pack in the power battery has a requirement for uniform temperature may include: obtaining temperature values ​​of multiple battery cells in the battery pack; determining a temperature peak value (the highest temperature of the battery cell) and a temperature valley value (the lowest temperature of the battery cell) from the temperature values ​​of the multiple battery cells; and judging whether the battery pack has a requirement for uniform temperature based on the temperature peak value and the temperature valley value.

[0155] Among them, Fig. 20 As shown, when the temperature valley value is greater than the first set temperature value t1 such as 45°C, it is determined that the battery pack has a temperature equalization requirement, and the type of temperature equalization requirement is a cooling temperature equalization requirement; it should be noted that the cooling temperature equalization requirement judgment process is as follows Fig.21 As shown;

[0156] When the temperature peak value is less than the second set temperature value t2, such as 0°C, it is determined that the battery pack has a temperature equalization requirement, and the type of the temperature equalization requirement is a heating temperature equalization requirement; it should be noted that the heating temperature equalization requirement judgment process is as follows Fig. 22 As shown;

[0157] When the temperature valley value is less than or equal to the first set temperature value t1 and the temperature peak value is greater than or equal to the second set temperature value t2, it is determined that the battery pack has no temperature equalization requirement.

[0158] S2, determines the power level of the temperature equalization system according to the ambient temperature value, the bus current value within the set time and the current remaining capacity value.

[0159] The process of executing step S2 is as follows: calculate the root mean square value RMS of the bus current value within a set time period such as 1 minute, and calculate the ratio between the root mean square value and the current remaining capacity value C, and then determine the power level of the temperature equalization system according to the ambient temperature value T and the ratio RMS / C.

[0160] Example 1: The type of average temperature requirement is cooling average temperature requirement. The cooling average temperature requirement judgment process is as follows: Fig.21 shown.

[0161] According to the ambient temperature value T and the ratio RMS / C, the power level of the temperature equalization system is determined, including:

[0162] When the ambient temperature value T is less than or equal to the third set temperature value T3, such as 35°C, if the ratio RMS / C is less than or equal to the first set value C4, such as 1.6, the power level of the temperature equalization system is determined to be the first power level, that is, the low demand cooling temperature equalization working condition;

[0163] When the ambient temperature value T is less than or equal to the third set temperature value T3, if the ratio RMS / C is set to be greater than the first set value C4, the speed value R of the compressor in the power battery temperature equalization system is obtained, and the power level of the temperature equalization system is determined according to the speed value R of the compressor;

[0164] When the ambient temperature value T is less than or equal to the fourth set temperature T4, such as 40° C., and greater than the third set temperature value T3, if the ratio RMS / C is greater than the second set value C3, such as 1.2, the speed value R of the compressor is obtained, and the power level of the temperature equalization system is determined according to the speed value R of the compressor;

[0165] When the ambient temperature value T is greater than the fourth set temperature T4, the power level of the temperature equalization system is determined to be the second power level, that is, the high demand cooling temperature equalization working condition;

[0166] The power corresponding to the first power level is less than the power corresponding to the second power level.

[0167] According to the speed value R of the compressor, the power level of the temperature equalization system is determined, including:

[0168] If the speed value R of the compressor is greater than the first set speed value R1, such as 3000r / min, the power level of the temperature equalization system is determined to be the third power level, that is, the medium demand cooling temperature equalization working condition;

[0169] If the speed value R of the compressor is less than or equal to the first set speed value R1, the power level of the temperature equalization system is determined to be the first power level, that is, the low demand cooling temperature equalization working condition;

[0170] If the speed value R of the compressor is greater than the second set speed value R2, such as 5000r / min, the power level of the temperature equalization system is determined to be the second power level, that is, the high demand cooling temperature equalization working condition;

[0171] If the speed value of the compressor is less than or equal to the second set speed value R2, the power level of the temperature equalization system is determined to be the third power level, that is, the medium demand cooling temperature equalization working condition;

[0172] The power corresponding to the first power level is smaller than the power corresponding to the third power level, and the power corresponding to the third power level is smaller than the power corresponding to the second power level.

[0173] Example 2: The type of average temperature requirement is heating average temperature requirement. The heating average temperature requirement judgment process is as follows: Fig. 22 shown.

[0174] According to the ambient temperature value T and the ratio RMS / C, the power level of the temperature equalization system is determined, including:

[0175] When the ambient temperature value T is greater than or equal to the fifth set temperature value T2, such as 0°C, if the ratio RMS / C is less than or equal to the third set value C2, such as 1, the power level of the temperature equalization system is determined to be the fourth power level, that is, the low-demand heating temperature equalization working condition;

[0176] When the ambient temperature value T is greater than or equal to the fifth set temperature value T2, if the ratio RMS / C is greater than the third set value C2, the speed value R of the compressor in the power battery temperature equalization system and the gear position of the heating film in the temperature equalization component (the gear position of the PTC heating film, referred to as the PTC gear position) are obtained, and the power level of the temperature equalization system is determined according to the speed value R of the compressor and the gear position of the heating film;

[0177] When the ambient temperature value T is greater than or equal to the sixth set temperature T1, such as -10°C, and less than the fifth set temperature value T2, if the ratio is greater than the fourth set value C1, such as 0.8, the speed value R of the compressor and the gear position of the heating film are obtained, and the power level of the temperature equalization system is determined according to the speed value R of the compressor and the gear position of the heating film;

[0178] When the ambient temperature value T is less than the sixth set temperature T1, the power level of the temperature equalization system is determined to be the fifth power level, that is, the high-demand heating temperature equalization working condition;

[0179] The power corresponding to the fourth power level is less than the power corresponding to the fifth power level.

[0180] According to the speed value R of the compressor and the gear position of the heating film, the power level of the temperature equalization system is determined, including:

[0181] If the speed value R of the compressor is greater than the first set speed value R1 or the gear position of the heating film is the first set gear position, the power level of the temperature equalization system is determined to be the fourth power level, that is, the low-demand heating temperature equalization working condition;

[0182] If the speed value R of the compressor is less than or equal to the first set speed value R1 and the gear position of the heating film is not the first set gear position, the power level of the temperature equalization system is determined to be the sixth power level, that is, the medium demand heating temperature equalization working condition;

[0183] If the speed value R of the compressor is greater than the second set speed value R2 or the gear position of the heating film is the second set gear position, the power level of the temperature equalization system is determined to be the fifth power level, that is, the high-demand heating temperature equalization working condition;

[0184] If the speed value R of the compressor is less than or equal to the second set speed value R2 and the gear position of the heating film is not the second set gear position, the power level of the temperature equalization system is determined to be the sixth power level, that is, the medium demand heating temperature equalization working condition;

[0185] The power corresponding to the fourth power level is less than the power corresponding to the sixth power level, and the power corresponding to the sixth power level is less than the power corresponding to the fifth power level.

[0186] S3, controlling the temperature averaging component according to the determined power level to achieve temperature regulation of the battery pack.

[0187] For example, in a power battery temperature equalization system, when the power level is determined to be a high-demand cooling temperature equalization condition, it means that a large amount of heat is generated inside the battery pack, and the heat needs to be quickly and effectively transferred and dispersed to prevent the battery from overheating and ensure the safety and performance of the battery. At this time, for the temperature equalization component of the liquid cooling system of the present invention, the heating film can be turned off, the flow of the coolant can be increased, the heat exchange efficiency can be improved, and the heat inside the battery pack can be taken away faster.

[0188] In the power battery temperature equalization system, when the power level is determined to be a high-demand heating and temperature equalization condition, it means that the temperature inside the battery pack is too low or the temperature distribution is uneven. It is necessary to quickly and effectively increase the temperature of the battery pack and ensure that the temperature is evenly distributed to prevent battery performance degradation or damage. At this time, for the temperature equalization component of the temperature equalization system used in the present invention, the working mode of the coolant can be adjusted to achieve the functions of heating and temperature equalization. For example, intermittent operation can be used to avoid local overheating of the battery pack; or variable frequency speed regulation can be used to adjust the heating power of the heating film according to the real-time temperature of the battery pack to achieve more precise temperature control.

[0189] In other embodiments of the present invention, step S3 of the present invention can also execute a corresponding temperature equalization process based on the determined power level and in combination with the working mode of the battery management system BMS to achieve temperature control of the battery pack.

[0190] Among them, the BMS working mode generally has 4 states, which reflect the current working status of the battery pack, as follows.

[0191] Discharge mode: The battery pack discharges current to the outside world.

[0192] Charging mode: The battery pack is charged externally.

[0193] Heating only: When the ambient temperature is very low, the battery pack cannot be charged. At this time, the outside world (usually the charging pile) provides power to the thermal management system, and then heats the battery pack first. After the temperature rises, it is charged again. Therefore, the prerequisite for heating only is that it is in charging mode, but there is no charging current at this time.

[0194] Cooling only: When the ambient temperature is particularly high, the battery pack cannot be charged. At this time, the outside world (usually the charging pile) provides power to the thermal management system, and then cools the battery pack first. After the temperature drops, charging can be resumed. Therefore, the prerequisite for heating only is that it is in charging mode, but there is no charging current at this time.

[0195] The thermal management working mode generally has three states, which reflect the working status of the current thermal management system, as follows.

[0196] Heating mode: absorbs external heat and then transfers the heat to the battery.

[0197] Cooling mode: absorbs heat from the battery pack and then takes the heat away.

[0198] Off: Thermal management is not operational.

[0199] It should be noted that the working mode can be subdivided into many modes. The present invention does not subdivide too many modes. Even if the types of modes are increased, the overall temperature equalization idea is the same.

[0200] It should be noted that t1, t2, C1, C2, C3, C4, T1, T2, T3, and T4 used in the present invention are obtained based on battery simulation, testing, and performance, and R1 and R2 are obtained based on battery thermal management simulation or test data and after matching the corresponding compressor power characteristics.

[0201] The general size relationship is: 60℃>t1>t2>-30℃, C4>C3>C2>C1, T4>T3>T2>T1, R2>R1.

[0202] For example: t1=45℃, t2=0℃; C4=1.6, C3=1.2, C2=1, C1=0.8; T4=40℃, T3=35℃, T2=0℃, T1=-10℃; R2=5000r / min, R1=3000r / min.

[0203] In summary, the power battery temperature equalization system according to an embodiment of the present invention includes multiple temperature equalization components, and the temperature equalization components are placed between two battery cells along the height direction of the battery cells. When the battery pack in the power battery has a temperature equalization requirement, the ambient temperature value, the bus current value within the set time length, and the current remaining capacity value of the battery pack are obtained. The bus current value is used to characterize the current value flowing through the bus connecting the battery pack and the external load or charging device, and the power level of the temperature equalization system is determined according to the ambient temperature value, the bus current value within the set time length, and the current remaining capacity value, and then the temperature equalization component is controlled according to the determined power level to achieve the regulation of the battery pack temperature. Therefore, the method determines the power level of the temperature equalization system by comprehensively considering multiple factors such as the ambient temperature value, the bus current value within the set time length, and the current remaining capacity value of the battery pack, and controls the temperature equalization component according to the determined power level to achieve precise regulation of the battery pack temperature.

[0204] Fig.23 It is a block diagram of a control device of a power battery temperature equalization system of the present invention.

[0205] like Fig.23 As shown, the control device 1000 of the power battery temperature equalization system of the present invention includes:

[0206] The acquisition module 1100 is used to obtain the ambient temperature value, the bus current value within a set time, and the current remaining capacity value of the battery pack in response to the battery pack having a temperature equalization requirement in the power battery; wherein the bus current value is used to represent the current value flowing through the bus connecting the battery pack and the external load or charging device;

[0207] A determination module 1200 is used to determine the power level of the temperature equalization system according to the ambient temperature value, the bus current value within a set time, and the current remaining capacity value;

[0208] The control module 1300 is used to control the temperature averaging component according to the determined power level to achieve temperature regulation of the battery pack.

[0209] According to one embodiment of the present invention, the above device further includes:

[0210] A judgment module is used to obtain temperature values ​​of multiple cells in a battery pack, and determine a temperature peak value and a temperature valley value from the temperature values ​​of the multiple cells, and judge whether the battery pack has a temperature equalization requirement according to the temperature peak value and the temperature valley value;

[0211] In which, in response to the temperature valley value being greater than the first set temperature value, it is determined that the battery pack has a temperature equalization requirement, and the type of the temperature equalization requirement is a cooling temperature equalization requirement;

[0212] In response to the temperature peak being less than the second set temperature value, determining that the battery pack has a temperature equalization requirement, and the type of the temperature equalization requirement is a heating temperature equalization requirement;

[0213] In response to the temperature valley value being less than or equal to the first set temperature value, and the temperature peak value being greater than or equal to the second set temperature value, determining that the battery pack has no temperature equalization requirement;

[0214] The first set temperature value is greater than the second set temperature value.

[0215] According to one embodiment of the present invention, the determination module 1200 is used to determine the power level of the temperature equalization system according to the ambient temperature value, the bus current value within the set time, and the current remaining capacity value, including:

[0216] Calculate the RMS value of the bus current within the set time period;

[0217] Calculate the ratio between the RMS value and the current remaining capacity value;

[0218] Determine the power level of the temperature equalization system based on the ambient temperature value and ratio.

[0219] According to an embodiment of the present invention, the type of temperature equalization requirement is cooling temperature equalization requirement, and the power level of the temperature equalization system is determined according to the ambient temperature value and the ratio, including:

[0220] In response to the ambient temperature value being less than or equal to the third set temperature value, if the ratio is less than or equal to the first set value, determining the power level of the temperature equalization system to be the first power level;

[0221] In response to the ambient temperature value being less than or equal to the third set temperature value, if the set ratio is greater than the first set value, obtaining a speed value of a compressor in the power battery temperature equalization system, and determining a power level of the temperature equalization system according to the speed value of the compressor;

[0222] In response to the ambient temperature value being less than or equal to the fourth set temperature and greater than the third set temperature value, if the ratio is greater than the second set value, obtaining the speed value of the compressor, and determining the power level of the temperature equalization system according to the speed value of the compressor;

[0223] In response to the ambient temperature value being greater than a fourth set temperature, determining the power level of the temperature equalization system to be a second power level;

[0224] The power corresponding to the first power level is less than the power corresponding to the second power level.

[0225] According to an embodiment of the present invention, when the determination module 1200 is used to determine the power level of the temperature equalization system according to the speed value of the compressor, it includes:

[0226] If the speed value of the compressor is greater than the first set speed value, determining the power level of the temperature equalization system to be the third power level;

[0227] If the speed value of the compressor is less than or equal to the first set speed value, determining the power level of the temperature equalization system to be the first power level;

[0228] If the speed value of the compressor is greater than the second set speed value, determining the power level of the temperature equalization system to be the second power level;

[0229] If the speed value of the compressor is less than or equal to the second set speed value, the power level of the temperature equalization system is determined to be the third power level;

[0230] The power corresponding to the first power level is smaller than the power corresponding to the third power level, and the power corresponding to the third power level is smaller than the power corresponding to the second power level.

[0231] According to an embodiment of the present invention, the type of the temperature equalization requirement is a heating temperature equalization requirement, and the determination module 1200 is used to determine the power level of the temperature equalization system according to the ambient temperature value and the ratio, including:

[0232] In response to the ambient temperature value being greater than or equal to the fifth set temperature value, if the ratio is less than or equal to the third set value, determining the power level of the temperature equalization system to be the fourth power level;

[0233] In response to the ambient temperature value being greater than or equal to the fifth set temperature value, if the ratio is greater than the third set value, obtaining the speed value of the compressor in the power battery temperature equalization system and the gear position of the heating film in the temperature equalization component, and determining the power level of the temperature equalization system according to the speed value of the compressor and the gear position of the heating film;

[0234] In response to the ambient temperature being greater than or equal to the sixth set temperature and less than the fifth set temperature, if the ratio is greater than the fourth set value, obtaining the speed value of the compressor and the gear position of the heating film, and determining the power level of the temperature equalization system according to the speed value of the compressor and the gear position of the heating film;

[0235] In response to the ambient temperature value being less than the sixth set temperature T1, determining the power level of the temperature equalization system to be the fifth power level;

[0236] The power corresponding to the fourth power level is less than the power corresponding to the fifth power level.

[0237] According to an embodiment of the present invention, the determination module 1200 is used to determine the power level of the temperature equalization system according to the speed value of the compressor and the gear position of the heating film, including:

[0238] If the speed value of the compressor is greater than the first set speed value or the gear position of the heating film is the first set gear position, the power level of the temperature equalization system is determined to be the fourth power level;

[0239] If the speed value of the compressor is less than or equal to the first set speed value and the gear position of the heating film is not the first set gear position, then the power level of the temperature equalization system is determined to be the sixth power level;

[0240] If the speed value of the compressor is greater than the second set speed value or the gear position of the heating film is the second set gear position, then the power level of the temperature equalization system is determined to be the fifth power level;

[0241] If the speed value of the compressor is less than or equal to the second set speed value and the gear position of the heating film is not the second set gear position, then the power level of the temperature equalization system is determined to be the sixth power level;

[0242] The power corresponding to the fourth power level is less than the power corresponding to the sixth power level, and the power corresponding to the sixth power level is less than the power corresponding to the fifth power level.

[0243] It should be noted that for details not disclosed in the control device of the battery temperature equalization system in the embodiment of the present invention, please refer to the details disclosed in the control method of the battery temperature equalization system in the embodiment of the present invention, and the details will not be disclosed here.

[0244] According to the control device of the power battery temperature equalization system of the embodiment of the present invention, the acquisition module obtains the ambient temperature value, the bus current value within the set time and the current remaining capacity value of the battery pack when the battery pack in the power battery has a temperature equalization requirement. The bus current value is used to characterize the current value flowing through the bus connecting the battery pack and the external load or charging device. The power level of the temperature equalization system is determined by the determination module according to the ambient temperature value, the bus current value within the set time and the current remaining capacity value. The temperature equalization component is controlled by the control module according to the determined power level to achieve the regulation of the battery pack temperature. Therefore, the device determines the power level of the temperature equalization system by comprehensively considering multiple factors such as the ambient temperature value, the bus current value within the set time and the current remaining capacity value of the battery pack, and controls the temperature equalization component according to the determined power level to achieve the precise regulation of the battery pack temperature.

[0245] Based on the above embodiments, the present invention further provides an electronic device.

[0246] An electronic device according to an embodiment of the present invention includes:

[0247] at least one processor; and,

[0248] a memory communicatively connected to the at least one processor; wherein,

[0249] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the above-mentioned control method of the power battery temperature equalization system.

[0250] The electronic device of the embodiment of the present invention, by executing the above-mentioned control method of the power battery temperature equalization system, determines the power level of the temperature equalization system by comprehensively considering multiple factors such as the ambient temperature value, the bus current value within a set time, and the current remaining capacity value of the battery pack, and controls the temperature equalization component according to the determined power level to achieve precise regulation of the battery pack temperature.

[0251] Based on the above embodiments, the present invention also proposes a computer-readable storage medium.

[0252] The computer-readable storage medium of the embodiment of the present invention stores computer program instructions, and when the program instructions are executed by a processor, the control method of the power battery temperature equalization system described above is implemented.

[0253] The control method of the power battery temperature equalizing system of the embodiment of the present invention determines the power level of the temperature equalizing system by executing the above-mentioned control method of the power battery temperature equalizing system by comprehensively considering multiple factors such as the ambient temperature value, the bus current value within a set time period, and the current remaining capacity value of the battery pack, and controls the temperature equalizing component according to the determined power level to achieve precise regulation of the battery pack temperature.

[0254] Based on the above embodiments, the present invention also proposes a computer program product.

[0255] In an embodiment of the present invention, when the instruction processor in the computer program product is executed, the above-mentioned control method of the power battery temperature equalization system is executed.

[0256] The computer program product of the embodiment of the present invention determines the power level of the temperature equalization system by executing the above-mentioned control method of the power battery temperature equalization system by comprehensively considering multiple factors such as the ambient temperature value, the bus current value within a set time period, and the current remaining capacity value of the battery pack, and controls the temperature equalization component according to the determined power level to achieve precise regulation of the battery pack temperature.

[0257] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0258] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0259] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0260] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0261] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0262] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0263] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0264] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A control method for a power battery temperature equalization system, characterized in that: The power battery temperature equalization system includes a plurality of temperature equalization components, and the temperature equalization components are placed between two battery cells along the height direction of the battery cells. The method includes: In response to a battery pack in the power battery having a temperature equalization requirement, obtaining an ambient temperature value, a bus current value within a set time, and a current remaining capacity value of the battery pack; wherein the bus current value is used to characterize a current value flowing through a bus connecting the battery pack and an external load or a charging device; Determining the power level of the temperature equalization system according to the ambient temperature value, the bus current value within the set time, and the current remaining capacity value; According to the determined power level, the temperature averaging component is controlled to achieve regulation of the battery pack temperature.

2. The method according to claim 1, characterized in that: The method further comprises: Obtaining temperature values ​​of multiple battery cells in the battery pack; Determining a temperature peak value and a temperature valley value from the temperature values ​​of the plurality of battery cells; Determining whether the battery pack needs to have an average temperature according to the temperature peak value and the temperature valley value; In which, in response to the temperature valley value being greater than the first set temperature value, it is determined that the battery pack has a temperature equalization requirement, and the type of the temperature equalization requirement is a cooling temperature equalization requirement; In response to the temperature peak being less than a second set temperature value, determining that the battery pack has a temperature equalization requirement, and the type of the temperature equalization requirement is a heating temperature equalization requirement; In response to the temperature valley value being less than or equal to the first set temperature value, and the temperature peak value being greater than or equal to the second set temperature value, determining that the battery pack has no temperature equalization requirement; Wherein, the first set temperature value is greater than the second set temperature value.

3. The method according to claim 1, characterized in that: The determining the power level of the temperature equalization system according to the ambient temperature value, the bus current value within the set time, and the current remaining capacity value includes: Calculate the root mean square value of the bus current value within the set time length; Calculating a ratio between the root mean square value and the current remaining capacity value; The power level of the temperature equalization system is determined according to the ambient temperature value and the ratio.

4. The method according to claim 3, characterized in that The type of the temperature averaging requirement is a cooling temperature averaging requirement, and determining the power level of the temperature averaging system according to the ambient temperature value and the ratio includes: In response to the ambient temperature value being less than or equal to a third set temperature value, if the ratio is less than or equal to a first set value, determining that the power level of the temperature equalization system is a first power level; In response to the ambient temperature value being less than or equal to the third set temperature value, if the set ratio value is greater than the first set value, obtaining a speed value of a compressor in the power battery temperature equalization system, and determining a power level of the temperature equalization system according to the speed value of the compressor; In response to the ambient temperature value being less than or equal to the fourth set temperature and greater than the third set temperature value, if the ratio is greater than the second set value, obtaining the speed value of the compressor, and determining the power level of the temperature equalization system according to the speed value of the compressor; In response to the ambient temperature value being greater than the fourth set temperature, determining the power level of the temperature equalization system to be a second power level; The power corresponding to the first power level is less than the power corresponding to the second power level.

5. The method according to claim 4, characterized in that Determining the power level of the temperature equalization system according to the rotation speed value of the compressor includes: If the speed value of the compressor is greater than the first set speed value, determining that the power level of the temperature equalization system is the third power level; If the speed value of the compressor is less than or equal to the first set speed value, determining that the power level of the temperature equalization system is the first power level; If the speed value of the compressor is greater than the second set speed value, determining the power level of the temperature equalization system to be the second power level; If the speed value of the compressor is less than or equal to the second set speed value, determining the power level of the temperature equalization system to be the third power level; The power corresponding to the first power level is smaller than the power corresponding to the third power level, and the power corresponding to the third power level is smaller than the power corresponding to the second power level.

6. The method according to claim 3, characterized in that The type of the temperature equalization requirement is a heating temperature equalization requirement, and determining the power level of the temperature equalization system according to the ambient temperature value and the ratio includes: In response to the ambient temperature value being greater than or equal to a fifth set temperature value, if the ratio is less than or equal to a third set value, determining that the power level of the temperature equalization system is a fourth power level; In response to the ambient temperature value being greater than or equal to the fifth set temperature value, if the ratio is greater than the third set value, obtaining a speed value of a compressor in the power battery temperature equalization system and a gear position of a heating film in the temperature equalization component, and determining a power level of the temperature equalization system according to the speed value of the compressor and the gear position of the heating film; In response to the ambient temperature value being greater than or equal to the sixth set temperature and less than the fifth set temperature value, if the ratio is greater than the fourth set value, obtaining the speed value of the compressor and the gear position of the heating film, and determining the power level of the temperature equalization system according to the speed value of the compressor and the gear position of the heating film; In response to the ambient temperature value being less than the sixth set temperature, determining the power level of the temperature equalization system to be the fifth power level; The power corresponding to the fourth power level is less than the power corresponding to the fifth power level.

7. The method according to claim 6, characterized in that Determining the power level of the temperature equalization system according to the rotation speed value of the compressor and the gear position of the heating film includes: If the speed value of the compressor is greater than the first set speed value or the gear position of the heating film is the first set gear position, determining that the power level of the temperature equalization system is the fourth power level; If the speed value of the compressor is less than or equal to the first set speed value and the gear position of the heating film is not the first set gear position, determining that the power level of the temperature equalization system is the sixth power level; If the speed value of the compressor is greater than the second set speed value or the gear position of the heating film is the second set gear position, determining the power level of the temperature equalization system to be the fifth power level; If the speed value of the compressor is less than or equal to the second set speed value and the gear position of the heating film is not the second set gear position, determining that the power level of the temperature equalization system is the sixth power level; The power corresponding to the fourth power level is smaller than the power corresponding to the sixth power level, and the power corresponding to the sixth power level is smaller than the power corresponding to the fifth power level.

8. A control device for a power battery temperature equalization system, characterized in that: The power battery temperature equalization system includes a plurality of temperature equalization components, and the temperature equalization components are placed between two battery cells along the height direction of the battery cells. The device includes: An acquisition module, configured to acquire an ambient temperature value, a bus current value within a set time period, and a current remaining capacity value of the battery pack in response to a battery pack in the power battery having a temperature equalization requirement; wherein the bus current value is used to characterize a current value flowing through a bus connecting the battery pack and an external load or a charging device; A determination module, used to determine the power level of the temperature equalization system according to the ambient temperature value, the bus current value within the set time and the current remaining capacity value; The control module is used to control the temperature balancing component according to the determined power level to achieve regulation of the battery pack temperature.

9. An electronic device, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the control method of the power battery temperature equalization system according to any one of claims 1 to 7.

10. A computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the program instructions are executed by the processor, the control method of the power battery temperature equalization system according to any one of claims 1 to 7 is implemented.

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