Cooling assembly, battery pack and electric equipment

Abstract

The utility model discloses a cooling assembly, a battery pack and electric equipment, relates to the technical field of vehicles, and aims to solve the problem that the internal temperature difference of a battery module is relatively large due to an existing heat dissipation structure. The cooling assembly is used for cooling a battery cell, the battery cell comprises a first electrode end part and a second electrode end part which are opposite and a middle part arranged between the first electrode end part and the second electrode end part, the cooling assembly comprises a first cooling piece and a second cooling piece, the first cooling piece is arranged on at least one of the first electrode end part and the second electrode end part, and the second cooling piece is arranged on at least one of the first electrode end part and the second electrode end part. The second cooling piece is arranged in the middle of the battery cell, and the cooling efficiency of the first cooling piece is higher than that of the second cooling piece.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a cooling assembly, a battery pack and an electrical equipment. Background Art

[0002] The battery is the only power source of new energy vehicles, and its performance directly affects the power performance, safety and economy of the whole vehicle. The performance, life and safety of power batteries are very sensitive to temperature. Too high, too low temperature and uneven distribution among battery modules or battery cells will all affect the batteries. Especially when the temperature is too high, it will even cause safety problems such as combustion and explosion. Therefore, it is very necessary to conduct thermal management on the batteries, and the thermal management technology of battery packs has also become a key technology restricting the development of electric vehicles.

[0003] Traditional battery modules generally use corrugated tube water-cooled plates or stamping plates as heat dissipation structures. The corrugated tube water-cooled plates or stamping plates are arranged between the bottom of the battery module and the shell of the battery pack. If directly arranged in the shell, the contact area between the corrugated tube water-cooled plate or stamping plate and the shell is relatively large, and heat is easily transferred to the shell through the corrugated tube water-cooled plate or stamping plate, resulting in heat loss.

[0004] Moreover, the heat generation degrees of battery modules at different positions are also different. The corrugated tube water-cooled plate or stamping plate as a heat dissipation structure can only cool the battery module as a whole, which may cause the temperatures of different parts of the battery module to be inconsistent under the action of the heat dissipation structure, forming a temperature difference inside the battery module, thereby affecting the use efficiency and service life of the battery. Therefore, the problem that the existing heat dissipation structure causes a large internal temperature difference in the battery module needs to be solved. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a cooling structure, aiming to solve the problem that the existing heat dissipation structure causes a large internal temperature difference in the battery module.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] In the first aspect of the present application, the utility model provides a cooling assembly for cooling an electric core. The electric core includes opposite first electrode ends and second electrode ends and a middle part arranged between the first electrode end and the second electrode end. The cooling assembly includes: a first cooling member and a second cooling member. The first cooling member is arranged at at least one of the first electrode end and the second electrode end, and the second cooling member is arranged at the middle part of the electric core. The cooling efficiency of the first cooling member is greater than that of the second cooling member.

[0008] In the cooling assembly provided in the embodiment of the present application, the cooling efficiency of the first cooling member is greater than the cooling efficiency of the second cooling member. Since the electrode part of the battery cell generates severe heat during use or charging, the middle part of the battery cell generates slightly less heat than the electrode end of the battery cell. The first cooling member is arranged in at least one of the first electrode end and the second electrode end, and the second cooling member is arranged in the middle part of the battery cell. This can cool the electrode end of the battery cell faster, and the cooling rate of the middle part of the battery cell is lower than the cooling rate of the electrode end, so that the internal temperature difference of the battery cell is maintained within an appropriate range, thereby avoiding a large internal temperature difference of the battery cell that leads to a decrease in the working efficiency and service life of the battery.

[0009] In some embodiments, the first cooling member includes: a first conductive member, a second conductive member, a third conductive member, a fourth conductive member, a first P-type semiconductor and a first N-type semiconductor; the first conductive member is thermally connected to the battery cell, the second conductive member is arranged on the side of the first conductive member away from the battery cell, the first P-type semiconductor is arranged between the first conductive member and the second conductive member, and is electrically connected to both the first conductive member and the second conductive member; the third conductive member is thermally connected to the battery cell, the fourth conductive member is arranged on the side of the third conductive member away from the battery cell, the first N-type semiconductor is arranged between the third conductive member and the fourth conductive member, and is electrically connected to both the third conductive member and the fourth conductive member; the first conductive member and the third conductive member are spaced apart, and the second conductive member is electrically connected to the fourth conductive member.

[0010] In this way, the first conductive member and the third conductive member are insulated, and the second conductive member and the fourth conductive member are electrically connected. When current flows from the first P-type semiconductor to the first N-type semiconductor, based on the thermoelectric effect, the top, namely the second conductive member and the fourth conductive member, will release heat, while the bottom, namely the first conductive member and the third conductive member, will absorb heat as a cooling end. The first conductive member and the third conductive member are thermally connected to the battery cell, so that the cooling end can absorb the heat of the battery cell and cool the battery cell. Compared with the current traditional battery internal cooler, the traditional medium heat exchange such as refrigerant and coolant is discarded, and a cooling component based on the thermoelectric effect is adopted. The cooling pipe and joint components can be omitted in the structure, which is convenient for design in terms of space and conducive to cost reduction.

[0011] In some embodiments, the second cooling member includes: a fifth conductive member, a sixth conductive member, a seventh conductive member, an eighth conductive member, a second P-type semiconductor, and a second N-type semiconductor; the fifth conductive member is in thermal conduction with the battery cell; the sixth conductive member is disposed on a side of the fifth conductive member facing away from the battery cell, and the second P-type semiconductor is disposed between the fifth conductive member and the sixth conductive member and is in electrical conduction with both the fifth conductive member and the sixth conductive member; the seventh conductive member is in thermal conduction with the battery cell; the second N-type semiconductor is disposed between the seventh conductive member and the eighth conductive member and is in electrical conduction with both the seventh conductive member and the eighth conductive member; the fifth conductive member and the seventh conductive member are spaced apart; the sixth conductive member and the eighth conductive member are in electrical conduction; the contact area between the first P-type semiconductor and the first conductive member is A1, and the contact area between the first P-type semiconductor and the second conductive member is A2; the contact area between the first N-type semiconductor and the third conductive member is A3, and the contact area between the first N-type semiconductor and the fourth conductive member is A4; the contact area between the second P-type semiconductor and the fifth conductive member is A5, and the contact area between the second P-type semiconductor and the sixth conductive member is A6; the contact area between the second N-type semiconductor and the seventh conductive member is A7, and the contact area between the N-type semiconductor and the eighth conductive member is A8; A1 / A2 > A5 / A6, and / or; A3 / A4 > A7 / A8.

[0012] In this way, the working principle of the second cooling member is the same as that of the first cooling member, which will not be elaborated herein. When the current direction is fixed, the cross-sectional area of the leg at the hot end is defined as Ah, and the cross-sectional area of the leg at the cold end is defined as Ac. As Ac increases, the temperature at the cold end gradually decreases and the refrigeration capacity gradually increases. By setting the ratio of the contact areas between the first conductive member, the second conductive member, the third conductive member, the fourth conductive member, the first P-type semiconductor, and the first N-type semiconductor and the ratio of the contact areas between the fifth conductive member, the sixth conductive member, the seventh conductive member, the eighth conductive member, the second P-type semiconductor, and the second N-type semiconductor as A1 / A2 > A5 / A6, and / or; A3 / A4 > A7 / A8, the refrigeration efficiency of the first cooling member can be made higher than that of the second cooling member, the cooling speed at the middle of the battery cell can be made lower than the cooling speed at the electrode ends, and the internal temperature difference of the battery cell can be maintained within an appropriate range, avoiding a large internal temperature difference of the battery cell that may lead to a decrease in the working efficiency and service life of the battery.

[0013] In some embodiments, the cooling assembly further includes: a third cooling member, including: a ninth conductive member, a tenth conductive member, a third P-type semiconductor, an eleventh conductive member, a twelfth conductive member, and a third N-type semiconductor; the ninth conductive member is thermally connected to the battery cell, the tenth conductive member is disposed on a side of the ninth conductive member away from the battery cell, the third P-type semiconductor is disposed between the ninth conductive member and the tenth conductive member, the third P-type semiconductor is electrically connected to both the ninth conductive member and the tenth conductive member, a contact area between the third P-type semiconductor and the ninth conductive member is A9, and a contact area between the third P-type semiconductor and the tenth conductive member is A10; the eleventh conductive member is thermally connected to the battery cell, the twelfth conductive member is disposed on a side of the eleventh conductive member away from the battery cell, the third N-type semiconductor is disposed between the eleventh conductive member and the twelfth conductive member, the third N-type semiconductor is electrically connected to both the eleventh conductive member and the twelfth conductive member, the ninth conductive member and the eleventh conductive member are spaced apart, and the tenth conductive member and the twelfth conductive member are electrically connected; a contact area between the third N-type semiconductor and the eleventh conductive member is A11, and a contact area between the third N-type semiconductor and the twelfth conductive member is A12; A1 / A2 > A9 / A10 > A5 / A6, and / or; A3 / A4 > A11 / A12 > A7 / A8.

[0014] Thus, the working principle of the third cooling member is the same as that of the first cooling member, which will not be elaborated herein. By setting the ratio of the contact areas between the ninth conductive member, the tenth conductive member, the third P-type semiconductor, the eleventh conductive member, the twelfth conductive member, and the third N-type semiconductor as A1 / A2 > A9 / A10 > A5 / A6, and / or; A3 / A4 > A11 / A12 > A7 / A8, the cooling efficiency of the third cooling member can be made lower than that of the first cooling member and higher than that of the second cooling member. By disposing the third cooling member in the transition region between the electrode end and the middle of the battery cell, the heat generation degree in this region is higher than that in the middle of the battery cell and lower than that at the electrode end of the battery cell, which can further reduce the temperature difference inside the battery cell and improve the working efficiency and service life of the battery cell.

[0015] In some embodiments, the cooling assembly further includes: a fourth cooling member, including: a thirteenth conductive member, a fourteenth conductive member, a fourth P-type semiconductor, a fifteenth conductive member, a sixteenth conductive member, and a fourth N-type semiconductor; the thirteenth conductive member is in thermal conduction with the battery cell; the fourteenth conductive member is disposed on a side of the thirteenth conductive member away from the battery cell, the fourth P-type semiconductor is disposed between the thirteenth conductive member and the fourteenth conductive member, the fourth P-type semiconductor is in electrical conduction with both the thirteenth conductive member and the fourteenth conductive member, a contact area between the fourth P-type semiconductor and the thirteenth conductive member is A13, and a contact area between the fourth P-type semiconductor and the fourteenth conductive member is A14; the fifteenth conductive member is in thermal conduction with the battery cell; the fourth N-type semiconductor is disposed between the fifteenth conductive member and the sixteenth conductive member, the fourth N-type semiconductor is in electrical conduction with both the fifteenth conductive member and the sixteenth conductive member, the thirteenth conductive member and the fifteenth conductive member are spaced apart, and the fourteenth conductive member and the sixteenth conductive member are in electrical conduction; a contact area between the fourth N-type semiconductor and the fifteenth conductive member is A15, and a contact area between the N-type semiconductor and the sixteenth conductive member is A16; A9 / A10 > A13 / A14 > A5 / A6, and / or; A11 / A12 > A15 / A16 > A7 / A8.

[0016] It can be understood that the function of the fourth cooling member is the same as that of the above-mentioned third cooling member, and details are not described herein in the present application.

[0017] In some embodiments, A1 / A2 > 1, A3 / A4 > 1; A5 / A6 ≤ 1, A7 / A8 ≤ 1.

[0018] In this way, the refrigeration efficiency of the first cooling member can be higher, and the refrigeration efficiency of the second cooling member can be lower, so that the cooling speed of the middle part of the battery cell is lower than that of the electrode ends, and the internal temperature difference of the battery cell is maintained within an appropriate range, avoiding a large internal temperature difference of the battery cell from causing a decrease in the working efficiency and service life of the battery.

[0019] In some embodiments, the resistance value of the first P-type semiconductor is less than that of the second P-type semiconductor, and / or; the resistance value of the first N-type semiconductor is less than that of the second N-type semiconductor.

[0020] In this way, the magnitude of the current flowing through the first cooling element and the second cooling element is related to the cooling efficiency of the first cooling element and the second cooling element. The greater the current, the higher the cooling efficiency. The resistance value of the first P-type semiconductor is less than that of the second P-type semiconductor, and / or; when the resistance value of the first N-type semiconductor is less than that of the second N-type semiconductor, the overall resistance of the first cooling element is less than that of the second cooling element. When the first cooling element and the second cooling element are connected to the same power supply, the current of the first cooling element is greater than that of the second cooling element, so that the refrigeration efficiency of the first cooling element is less than that of the second cooling element. The different temperatures at different positions of the battery cell can be reduced to a similar range, avoiding a large internal temperature difference in the battery cell, which may lead to a decrease in the working efficiency and service life of the battery.

[0021] In some embodiments, the number of the first cooling elements is multiple, and the multiple first cooling elements form two groups of first cooling elements, namely the first group of cooling elements and the second group of cooling elements; the first group of cooling elements includes at least one first cooling element, the second group of cooling elements includes at least one second cooling element, the first group of cooling elements is arranged at the end of the first electrode, and the second group of cooling elements is arranged at the end of the second electrode.

[0022] In this way, the cooling assembly includes multiple first cooling elements, which can improve the cooling efficiency of the cooling assembly and also expand the cooling range of the cooling assembly to adapt to the large-scale heat generation of the battery cell. Moreover, the multiple first cooling elements are divided into the first group of cooling elements and the second group of cooling elements. The first group of cooling elements is arranged at the end of the first electrode, and the second group of cooling elements is arranged at the end of the second electrode, so that the end of the first electrode and the end of the second electrode of the battery cell can be cooled simultaneously and at a faster speed than other positions, avoiding serious heat generation at the end of the first electrode and the end of the second electrode of the battery cell, which may cause damage to the battery cell.

[0023] In some embodiments, the first group of cooling elements includes multiple first cooling elements, and the second group of cooling elements includes multiple first cooling elements; the number of the second cooling elements is multiple; the multiple first cooling elements in the first group of cooling elements, the multiple first cooling elements in the second group of cooling elements, and the multiple second cooling elements are all connected in series to form a series assembly.

[0024] In this way, the cooling efficiency of the cooling assembly can be improved, and the cooling range of the cooling assembly can also be expanded to adapt to the large-scale heat generation of the battery cell. Connecting the multiple first cooling elements in the first group of cooling elements, the multiple first cooling elements in the second group of cooling elements, and the multiple second cooling elements in series to form a series assembly can control the first cooling element and the second cooling element using the same power supply, improving the control efficiency and reducing the control cost.

[0025] In some embodiments, two ends of the series component are a first end and a second end respectively; the cooling component further includes: a first connection terminal and a second connection terminal, the first connection terminal and the second connection terminal are connected to the first end, the first connection terminal is used to connect the first end to the positive electrode of the power supply, and the second connection terminal is used to connect the first end to the negative electrode of the power supply; a third connection terminal and a fourth connection terminal, the third connection terminal and the fourth connection terminal are connected to the second end, the third connection terminal is used to connect the second end to the positive electrode of the power supply, and the fourth connection terminal is used to connect the second end to the negative electrode of the power supply.

[0026] It can be understood that by closing different circuits to change the direction of the current, the heating or cooling function of the cooling component under different working conditions is realized. When the battery cell is in different environments, there are situations of temperature rise or fall. The cooling component can change the direction of the current, so that the cooling component absorbs or releases heat to adapt to different working conditions of the battery cell and ensure the normal operation of the battery cell.

[0027] In some embodiments, it further includes: a first substrate and a second substrate, the first substrate is in thermal conduction with the battery cell, the second substrate is arranged on the side of the first substrate away from the battery cell, the first substrate and the second substrate are arranged at intervals, the first cooling member, the second cooling member, the third cooling member and the fourth cooling member are all arranged between the first substrate and the second substrate, and the first cooling member, the second cooling member, the third cooling member and the fourth cooling member are all in thermal conduction with the first substrate.

[0028] In this way, the first substrate and the second substrate can support the first cooling member, the second cooling member, the third cooling member and the fourth cooling member to prevent the first cooling member, the second cooling member, the third cooling member and the fourth cooling member from falling off. Moreover, since the first substrate is in thermal conduction with the battery cell, the first substrate can also play a role in heat diffusion, enabling the cooling component to heat up or cool down the battery cells in a larger range, improving the stability and working range of the cooling component.

[0029] In some embodiments, the materials of the first substrate and the second substrate are both ceramics.

[0030] In this way, the ceramic material has the characteristics of good insulation performance, high mechanical strength, excellent heat conduction performance, etc. The good insulation performance of the ceramic material can prevent the cooling component from being damaged due to short circuit. The high mechanical strength of the ceramic material can improve the support strength of the first substrate and the second substrate for the cooling component. The excellent heat conduction performance of the ceramic material can improve the heat dissipation efficiency of the heat dissipation component.

[0031] In the second aspect of the present application, a battery pack is provided, including a battery cell and the above-mentioned cooling component; the battery cell includes opposite first electrode end portions and a second electrode end portion and a middle portion arranged between the first electrode end portion and the second electrode end portion; the first cooling member in the cooling component is arranged at at least one of the first electrode end portion and the second electrode end portion, and the second cooling member is arranged at the middle portion of the battery cell.

[0032] It is understandable that since the battery pack provided in this application includes the cooling component as described above, both can solve the same problems and achieve the same effects, and thus will not be elaborated herein one by one.

[0033] In some embodiments, the battery pack includes: a plurality of battery cells and a plurality of cooling components, and the plurality of cooling components are respectively disposed on the plurality of battery cells.

[0034] In this way, the cooling component can cool or heat up the plurality of battery cells in the battery pack to control the temperature of the battery pack within the range where the battery pack can operate normally, and prevent the battery pack from failing to operate normally due to large temperature changes.

[0035] In the third aspect of this application, an electrical device is provided, which includes an electrical appliance component and the above-mentioned battery pack, and the battery pack is electrically connected to the electrical appliance component.

[0036] It is understandable that since the electrical device provided in this application includes the battery pack as described above, both can solve the same problems and achieve the same effects, and thus will not be elaborated herein one by one. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of this application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0038] Figure 1 It is a schematic structural diagram of a cooling component provided by the present utility model;

[0039] Figure 2 It is a schematic structural diagram of the battery pack provided by the present utility model;

[0040] Figure 3 It is a schematic structural diagram of a first cooling member provided by the present utility model;

[0041] Figure 4 It is a schematic structural diagram of a second cooling member provided by the present utility model;

[0042] Figure 5 It is a schematic installation diagram of multiple groups of cooling components provided by the present utility model.

[0043] Reference numerals: cooling assembly, 100; first cooling member, 10; second cooling member, 20; first conductive member, 11; second conductive member, 12; third conductive member, 13; fourth conductive member, 14; first P-type semiconductor, 15; first N-type semiconductor, 16; fifth conductive member, 21; sixth conductive member, 22; seventh conductive member, 23; eighth conductive member, 24; second P-type semiconductor, 25; second N-type semiconductor, 26; first end, 30; second end, 40; first connection terminal, 31; second connection terminal, 32; third connection terminal, 41; fourth connection terminal, 42; first substrate, 50; second substrate, 60; first group of cooling members, 70; second group of cooling members, 80; battery pack, 200; battery cell, 210. Detailed implementation

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. is based on the orientation or relative positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention. Without special instructions, under the condition of satisfying the relative positional relationship shown in the accompanying drawings, the above-described orientation description can be flexibly set during the actual application process.

[0046] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0047] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", and "communication" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0048] In the embodiments of the present utility model, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, article or device including that element.

[0049] In the embodiments of the present utility model, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present utility model should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0050] In the description of this specification, specific features, structures, materials or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0051] The battery is the only power source of new energy vehicles, and the quality of its performance directly affects the power performance, safety and economy of the whole vehicle. The performance, life and safety of power batteries are very sensitive to temperature. Too high, too low temperature and uneven distribution among battery modules or battery cells will all affect the battery. Especially when the temperature is too high, it will even cause safety problems such as combustion and explosion. Therefore, it is very necessary to perform thermal management on the battery, and the thermal management technology of the battery pack has also become the key technology restricting the development of electric vehicles.

[0052] The heat generation degrees of battery modules are also different at different positions. Conventional heat dissipation structures can only cool the battery modules as a whole, which may lead to inconsistent temperatures of each part of the battery module under the action of the heat dissipation structure, forming a temperature difference inside the battery module, thereby affecting the working efficiency and service life of the battery.

[0053] The purpose of the present utility model is to provide a cooling structure, aiming to solve the problem of large temperature difference inside the battery module caused by the existing heat dissipation structure.

[0054] To achieve the above object, the present utility model adopts the following technical solutions:

[0055] As Figure 1 and Figure 2 shown, the present utility model provides a cooling assembly 100 for cooling the battery cell 210. The battery cell 210 includes opposite first and second electrode ends and a middle part disposed between the first and second electrode ends. The cooling assembly 100 includes: a first cooling member 10 and a second cooling member 20. The first cooling member 10 is disposed at at least one of the first and second electrode ends, and the second cooling member 20 is disposed at the middle part of the battery cell 210. The cooling efficiency of the first cooling member 10 is greater than that of the second cooling member 20.

[0056] Wherein, the first and second electrode ends of the battery cell 210 can be disposed at the top or bottom of the battery cell 210, or can be disposed on the peripheral side of the battery cell 210. This application does not make a limitation in this regard.

[0057] Wherein, the first cooling member 10 can be disposed at the first electrode end, or can be disposed at the second electrode end, or can be disposed at both the first and second electrode ends.

[0058] In addition, both the first cooling member 10 and the second cooling member 20 can be disposed at the top or bottom of the battery cell 210, or can be disposed on the peripheral side of the battery cell 210. This application does not make a limitation in this regard.

[0059] In the cooling assembly 100 provided by the embodiment of this application, the cooling efficiency of the first cooling member 10 is greater than that of the second cooling member 20. Since the electrode part of the battery cell 210 generates heat more severely during use or charging, and the heat generation degree of the middle part of the battery cell 210 is slightly weaker than that of the electrode ends of the battery cell 210. By disposing the first cooling member 10 at at least one of the first and second electrode ends and disposing the second cooling member 20 at the middle part of the battery cell 210, the electrode ends of the battery cell 210 can be cooled faster, and the cooling speed of the middle part of the battery cell 210 is lower than that of the electrode ends, so that the internal temperature difference of the battery cell 210 is maintained within an appropriate range, avoiding a large internal temperature difference of the battery cell 210 from causing a decrease in the working efficiency and service life of the battery.

[0060] In some embodiments, as Figure 1 , Figure 2 and Figure 3As shown in the figure, the first cooling member 10 includes: a first conductive member 11, a second conductive member 12, a third conductive member 13, a fourth conductive member 14, a first P-type semiconductor 15, and a first N-type semiconductor 16; the first conductive member 11 is in thermal conduction with the battery cell 210, the second conductive member 12 is disposed on a side of the first conductive member 11 away from the battery cell 210, the first P-type semiconductor 15 is disposed between the first conductive member 11 and the second conductive member 12 and is in electrical conduction with both the first conductive member 11 and the second conductive member 12; the third conductive member 13 is in thermal conduction with the battery cell 210, the fourth conductive member 14 is disposed on a side of the third conductive member 13 away from the battery cell 210, the first N-type semiconductor 16 is disposed between the third conductive member 13 and the fourth conductive member 14 and is in electrical conduction with both the third conductive member 13 and the fourth conductive member 14; the first conductive member 11 and the third conductive member 13 are spaced apart, and the second conductive member 12 and the fourth conductive member 14 are in electrical conduction.

[0061] In this way, the first conductive member 11 and the third conductive member 13 are insulated, and the second conductive member 12 and the fourth conductive member 14 are electrically connected. When current flows from the first P-type semiconductor 15 to the first N-type semiconductor 16, based on the thermoelectric effect, the top, i.e., the second conductive member 12 and the fourth conductive member 14, will release heat, while the bottom, i.e., the first conductive member 11 and the third conductive member 13, will absorb heat as the cooling end. Connecting the first conductive member 11 and the third conductive member 13 in thermal conduction with the battery cell 210 allows the cooling end to absorb the heat of the battery cell 210 and cool the battery cell 210. Compared with the current traditional in-battery cooler, by eliminating the traditional media heat exchange with refrigerant and coolant and using the cooling component 100 based on the thermoelectric effect, the cooling pipes and joint components can be omitted in terms of structure, which is not only convenient for design in terms of space but also beneficial for cost reduction.

[0062] Among them, the first conductive member 11 and the second conductive member 12 and the battery cell 210 can be connected by thermal conductive glue, or by welding or clamping connection, etc. This application does not make any limitation in this regard.

[0063] In addition, the material of the conductive member can be selected from metal materials, composite materials, graphite, etc. This application does not make any limitation in this regard.

[0064] In addition, the shape of the conductive member can be a regular shape such as a cuboid, a cylinder, or a prism, etc., or the conductor can also be an irregular shape. This application does not make any limitation in this regard.

[0065] In a possible structural design, the first conductive member 11, the second conductive member 12, the third conductive member 13, and the fourth conductive member 14 are all plate-shaped structures. The first conductive member 11 and the second conductive member 12 are arranged at intervals and parallel to each other. The first P-type semiconductor 15 is disposed between the first conductive member 11 and the second conductive member 12. The third conductive member 13 and the fourth conductive member 14 are arranged at intervals and parallel to each other. The first N-type semiconductor 16 is disposed between the third conductive member 13 and the fourth conductive member 14.

[0066] In this way, by setting the first conductive member 11, the second conductive member 12, the third conductive member 13, and the fourth conductive member 14 as plate-shaped structures, the first P-type semiconductor 15 located between the first conductive member 11 and the second conductive member 12 and the first N-type semiconductor 16 disposed between the third conductive member 13 and the fourth conductive member 14 can be made more stable, and the first P-type semiconductor 15 and the first N-type semiconductor 16 can be prevented from falling off. By arranging the first conductive member 11 and the second conductive member 12 at intervals and parallel to each other and arranging the third conductive member 13 and the fourth conductive member 14 at intervals and parallel to each other, the first cooling member 10 and the second cooling member 20 can be made more stable.

[0067] In some embodiments, as Figure 1 , Figure 2 and Figure 4 shown, the second cooling member 20 includes: a fifth conductive member 21, a sixth conductive member 22, a seventh conductive member 23, an eighth conductive member 24, a second P-type semiconductor 25, and a second N-type semiconductor 26; the fifth conductive member 21 is in thermal conduction with the battery cell 210; the sixth conductive member 22 is disposed on a side of the fifth conductive member 21 facing away from the battery cell 210. The second P-type semiconductor 25 is disposed between the fifth conductive member 21 and the sixth conductive member 22 and is in electrical conduction with both the fifth conductive member 21 and the sixth conductive member 22; the seventh conductive member 23 is in thermal conduction with the battery cell 210; the second N-type semiconductor 26 is disposed between the seventh conductive member 23 and the eighth conductive member 24 and is in electrical conduction with both the seventh conductive member 23 and the eighth conductive member 24; the fifth conductive member 21 and the seventh conductive member 23 are disposed at intervals; the sixth conductive member 22 and the eighth conductive member 24 are in electrical conduction; the contact area between the first P-type semiconductor 15 and the first conductive member 11 is A1, and the contact area between the first P-type semiconductor 15 and the second conductive member 12 is A2; the contact area between the first N-type semiconductor 16 and the third conductive member 13 is A3, and the contact area between the first N-type semiconductor 16 and the fourth conductive member 14 is A4; the contact area between the second P-type semiconductor 25 and the fifth conductive member 21 is A5, and the contact area between the second P-type semiconductor 25 and the sixth conductive member 22 is A6; the contact area between the second N-type semiconductor 26 and the seventh conductive member 23 is A7, and the contact area between the N-type semiconductor and the eighth conductive member 24 is A8; A1 / A2 > A5 / A6, and / or; A3 / A4 > A7 / A8.

[0068] Among them, the structure of the second cooling member 20 can refer to the structure of the first cooling member 10, and details thereof are not described herein in this application.

[0069] In addition, the first cooling member 10 and the second cooling member 20 can be connected to the same power source to form a series structure, or can be connected to different power sources, and this application does not limit this.

[0070] In this way, the working principle of the second cooling member 20 is the same as that of the first cooling member 10, and details thereof are not described herein in this application. When the current direction is fixed, the cross-sectional area of the legs at the hot end is defined as Ah, and the cross-sectional area of the legs at the cold end is defined as Ac. As Ac increases, the temperature at the cold end gradually decreases, and the refrigeration capacity gradually increases. By setting the ratio of the contact areas between the first conductive member 11, the second conductive member 12, the third conductive member 13, the fourth conductive member 14, the first P-type semiconductor 15 and the first N-type semiconductor 16, and the ratio of the contact areas between the fifth conductive member 21, the sixth conductive member 22, the seventh conductive member 23, the eighth conductive member 24, the second P-type semiconductor 25 and the second N-type semiconductor 26 as A1 / A2 > A5 / A6, and / or; A3 / A4 > A7 / A8, the refrigeration efficiency of the first cooling member 10 can be higher than that of the second cooling member 20, the cooling speed of the middle part of the battery cell 210 can be lower than the cooling speed of the electrode ends, the internal temperature difference of the battery cell 210 can be maintained within an appropriate range, and the decrease in the working efficiency and service life of the battery caused by a large internal temperature difference of the battery cell 210 can be avoided.

[0071] In a possible structural design, A1 / A2 > A5 / A6 or A3 / A4 > A7 / A8.

[0072] In this way, the cooling efficiency of the first cooling member 10 can be higher than that of the second cooling member 20, the cooling speed of the middle part of the battery cell 210 can be lower than the cooling speed of the electrode ends, the internal temperature difference of the battery cell 210 can be maintained within an appropriate range, and the decrease in the working efficiency and service life of the battery caused by a large internal temperature difference of the battery cell 210 can be avoided.

[0073] In another possible structural design, A1 / A2 > A5 / A6 and A3 / A4 > A7 / A8.

[0074] In this way, the cooling efficiency of the first cooling member 10 can be higher than that of the second cooling member 20, and the difference between the cooling efficiency of the first cooling member 10 and the cooling efficiency of the second cooling member 20 can be further enlarged, so that the cooling assembly 100 can adapt to the situation where the heat release degrees of different regions of the battery cell 210 vary greatly, the cooling speed of the middle part of the battery cell 210 can be lower than the cooling speed of the electrode ends, the internal temperature difference of the battery cell 210 can be maintained within an appropriate range, and the decrease in the working efficiency and service life of the battery caused by a large internal temperature difference of the battery cell 210 can be avoided.

[0075] In some embodiments, the cooling assembly 100 further includes: a third cooling member, including: a ninth conductive member, a tenth conductive member, a third P-type semiconductor, an eleventh conductive member, a twelfth conductive member, and a third N-type semiconductor; the ninth conductive member is in thermal conduction with the battery cell 210, the tenth conductive member is disposed on a side of the ninth conductive member away from the battery cell 210, the third P-type semiconductor is disposed between the ninth conductive member and the tenth conductive member, the third P-type semiconductor is electrically conductive with both the ninth conductive member and the tenth conductive member, a contact area between the third P-type semiconductor and the ninth conductive member is A9, and a contact area between the third P-type semiconductor and the tenth conductive member is A10; the eleventh conductive member is in thermal conduction with the battery cell 210, the twelfth conductive member is disposed on a side of the eleventh conductive member away from the battery cell 210, the third N-type semiconductor is disposed between the eleventh conductive member and the twelfth conductive member, the third N-type semiconductor is electrically conductive with both the eleventh conductive member and the twelfth conductive member, the ninth conductive member and the eleventh conductive member are spaced apart, and the tenth conductive member and the twelfth conductive member are electrically conductive; a contact area between the third N-type semiconductor and the eleventh conductive member is A11, and a contact area between the third N-type semiconductor and the twelfth conductive member is A12; A1 / A2 > A9 / A10 > A5 / A6, and / or; A3 / A4 > A11 / A12 > A7 / A8.

[0076] Thus, the working principle of the third cooling member is the same as that of the first cooling member 10, which is not elaborated herein. By setting the ratio of the contact areas between the ninth conductive member, the tenth conductive member, the third P-type semiconductor, the eleventh conductive member, the twelfth conductive member, and the third N-type semiconductor as A1 / A2 > A9 / A10 > A5 / A6, and / or; A3 / A4 > A11 / A12 > A7 / A8, the cooling efficiency of the third cooling member can be made lower than that of the first cooling member 10 and higher than that of the second cooling member 20. By disposing the third cooling member in the transition region between the electrode end and the middle of the battery cell 210, the heat generation degree in this region is higher than that in the middle of the battery cell 210 and lower than that at the electrode end of the battery cell 210, which can further reduce the temperature difference inside the battery cell 210 and improve the working efficiency and service life of the battery cell 210.

[0077] In some embodiments, the cooling component 100 further includes: a fourth cooling member, including: a thirteenth conductive member, a fourteenth conductive member, a fourth P-type semiconductor, a fifteenth conductive member, a sixteenth conductive member, and a fourth N-type semiconductor; the thirteenth conductive member is in thermal conduction with the battery cell 210; the fourteenth conductive member is disposed on a side of the thirteenth conductive member facing away from the battery cell 210, the fourth P-type semiconductor is disposed between the thirteenth conductive member and the fourteenth conductive member, the fourth P-type semiconductor is electrically conductive with both the thirteenth conductive member and the fourteenth conductive member, a contact area between the fourth P-type semiconductor and the thirteenth conductive member is A13, and a contact area between the fourth P-type semiconductor and the fourteenth conductive member is A14; the fifteenth conductive member is in thermal conduction with the battery cell 210; the fourth N-type semiconductor is disposed between the fifteenth conductive member and the sixteenth conductive member, the fourth N-type semiconductor is electrically conductive with both the fifteenth conductive member and the sixteenth conductive member, the thirteenth conductive member and the fifteenth conductive member are spaced apart, and the fourteenth conductive member and the sixteenth conductive member are electrically conductive; a contact area between the fourth N-type semiconductor and the fifteenth conductive member is A15, and a contact area between the N-type semiconductor and the sixteenth conductive member is A16; A9 / A10 > A13 / A14 > A5 / A6, and / or; A11 / A12 > A15 / A16 > A7 / A8.

[0078] It can be understood that the function of the fourth cooling member is the same as that of the above-mentioned third cooling member, and details thereof are not described herein again in this application.

[0079] In addition, the structures of the third cooling member and the fourth cooling member may refer to the structure of the first cooling member 10, and details thereof are not described herein again in this application.

[0080] In some embodiments, A1 / A2 > 1, A3 / A4 > 1; A5 / A6 ≤ 1, A7 / A8 ≤ 1.

[0081] In this way, the refrigeration efficiency of the first cooling member 10 can be made higher, and the refrigeration efficiency of the second cooling member 20 can be made lower, so that the cooling speed of the middle part of the battery cell 210 is lower than the cooling speed of the electrode end part, and the internal temperature difference of the battery cell 210 is maintained within an appropriate range, avoiding a large internal temperature difference of the battery cell 210 from causing a decrease in the working efficiency and service life of the battery.

[0082] In some embodiments, the resistance value of the first P-type semiconductor 15 is less than the resistance value of the second P-type semiconductor 25, and / or; the resistance value of the first N-type semiconductor 16 is less than the resistance value of the second N-type semiconductor 26.

[0083] It can be understood that the resistance value of the first P-type semiconductor 15 can be made smaller than that of the second P-type semiconductor 25 by selecting different types of semiconductors, or semiconductors of the same type but with different relevant parameters can also be used to make the resistance value of the first P-type semiconductor 15 smaller than that of the second P-type semiconductor 25. This application does not limit this; the selection conditions for the first N-type semiconductor 16 and the second N-type semiconductor 26 can refer to the selection conditions for the first P-type semiconductor 15 and the second P-type semiconductor 25 above, and this application does not limit this.

[0084] In this way, the magnitude of the current flowing through the first cooling member 10 and the second cooling member 20 is related to the cooling efficiency of the first cooling member 10 and the second cooling member 20. The greater the current, the higher the cooling efficiency. The resistance value of the first P-type semiconductor 15 is smaller than that of the second P-type semiconductor 25, and / or; when the resistance value of the first N-type semiconductor 16 is smaller than that of the second N-type semiconductor 26, the overall resistance of the first cooling member 10 is smaller than that of the second cooling member 20. When the first cooling member 10 and the second cooling member 20 are connected to the same power supply, the current of the first cooling member 10 is greater than that of the second cooling member, so that the refrigeration efficiency of the first cooling member 10 is lower than that of the second cooling member 20. Different temperatures at different positions of the battery cell 210 can be reduced to a similar range, avoiding a large internal temperature difference in the battery cell 210 and resulting in a decrease in the working efficiency and service life of the battery.

[0085] In some embodiments, such as Figure 1 、 Figure 2 and Figure 3 shown, the number of the first cooling members 10 is multiple, and the multiple first cooling members 10 form two groups of first cooling members 10, which are the first group of cooling members 70 and the second group of cooling members 80 respectively; the first group of cooling members 70 includes at least one first cooling member 10, the second group of cooling members 80 includes at least one second cooling member 20, the first group of cooling members 70 is arranged at the end of the first electrode, and the second group of cooling members 80 is arranged at the end of the second electrode.

[0086] In this way, the cooling assembly 100 includes multiple first cooling members 10, which can improve the cooling efficiency of the cooling assembly 100 and also expand the cooling range of the cooling assembly 100 to adapt to the large-scale heat generation of the battery cell 210. Moreover, by dividing the multiple first cooling members 10 into the first group of cooling members 70 and the second group of cooling members 80, with the first group of cooling members 70 arranged at the end of the first electrode and the second group of cooling members 80 arranged at the end of the second electrode, the first electrode end and the second electrode end of the battery cell 210 can be cooled simultaneously and at a faster speed than other positions, avoiding serious heating at the first electrode end and the second electrode end of the battery cell 210 and resulting in damage to the battery cell 210.

[0087] In a possible structural design, the first electrode end and the second electrode end of the battery cell 210 are disposed on opposite sides of the battery cell 210. The first set of cooling members 70 is disposed on one side of the upper portion of the battery cell 210 near the first electrode end, and the second set of cooling members 80 is disposed on one side of the upper portion of the battery cell 210 near the second electrode end. The second cooling member 20 is disposed on the top of the battery cell 210 and between the first set of cooling members 70 and the second set of cooling members 80.

[0088] In this way, the first set of cooling members 70 and the second set of cooling members 80 can cool the first electrode end and the second electrode end simultaneously, and the second cooling member 20 can cool the middle part of the battery cell 210. Disposing the first set of cooling members 70, the second set of cooling members 80 and the second cooling member on the upper portion of the battery cell 210, and disposing the first electrode end and the second electrode end of the battery cell 210 on opposite sides of the battery cell 210 can make the installation of the cooling assembly 100 more convenient, avoid the positions of the first electrode end and the second electrode end conflicting with the cooling assembly 100 and affecting the fixed installation of the cooling assembly 100, and can also enable the battery cell 210 to support the cooling assembly 100 to prevent the cooling assembly 100 from falling off during use.

[0089] In some embodiments, as Figure 1 , Figure 2 and Figure 3 shown, the first set of cooling members 70 includes a plurality of first cooling members 10, and the second set of cooling members 80 includes a plurality of first cooling members 10; the number of the second cooling members 20 is multiple; the plurality of first cooling members 10 of the first set of cooling members 70, the plurality of first cooling members 10 of the second set of cooling members 80 and the plurality of second cooling members 20 are all connected in series to form a series assembly.

[0090] In this way, the cooling efficiency of the cooling assembly 100 can be improved, and the cooling range of the cooling assembly 100 can also be increased to adapt to the large-range heat generation of the battery cell 210. Connecting the plurality of first cooling members 10 of the first set of cooling members 70, the plurality of first cooling members 10 of the second set of cooling members 80 and the plurality of second cooling members 20 in series to form a series assembly can use the same power source to control the first cooling member 10 and the second cooling member, improving the control efficiency and reducing the control cost.

[0091] In some embodiments, as Figure 1 and Figure 2As shown, the two ends of the series component are the first end 30 and the second end 40 respectively; the cooling component 100 further includes: a first connection terminal 31 and a second connection terminal 32. The first connection terminal 31 and the second connection terminal 32 are connected to the first end 30. The first connection terminal 31 is used to connect the first end 30 to the positive electrode of the power supply, and the second connection terminal 32 is used to connect the first end 30 to the negative electrode of the power supply; a third connection terminal 41 and a fourth connection terminal 42. The third connection terminal 41 and the fourth connection terminal 42 are connected to the second end 40. The third connection terminal 41 is used to connect the second end 40 to the positive electrode of the power supply, and the fourth connection terminal 42 is used to connect the second end 40 to the negative electrode of the power supply.

[0092] Wherein, when the first connection terminal 31 is connected to the positive electrode of the power supply and the fourth connection terminal 42 is connected to the negative electrode of the power supply, the current flows from the P-type semiconductor to the N-type semiconductor, and one end of the cooling component 100 close to the battery cell 210 has a heat absorption effect, and the cooling component 100 can cool the battery cell 210; when the second connection terminal 32 is connected to the negative electrode of the power supply and the third connection terminal 41 is connected to the positive electrode of the power supply, the current flows from the N-type semiconductor to the P-type semiconductor, and one end of the cooling component 100 close to the battery cell 210 has a heat release effect, and the cooling component 100 can heat up the battery cell 210; it is also possible to adjust the order of the current flowing from the P-type semiconductor to the N-type semiconductor as needed, that is, when the first connection terminal 31 is connected to the positive electrode of the power supply and the fourth connection terminal 42 is connected to the negative electrode of the power supply, the current flows from the N-type semiconductor to the P-type semiconductor, and one end of the cooling component 100 close to the battery cell 210 has a heat release effect, and the cooling component 100 can heat up the battery cell 210; when the second connection terminal 32 is connected to the negative electrode of the power supply and the third connection terminal 41 is connected to the positive electrode of the power supply, the current flows from the N-type semiconductor to the P-type semiconductor, and one end of the cooling component 100 close to the battery cell 210 has a heat absorption effect, and the cooling component 100 can cool the battery cell 210; the present application does not limit this.

[0093] It can be understood that by closing different circuits to change the direction of the current, the heating or cooling function of the cooling component 100 under different working conditions is realized. The battery cell 210 may be heated or cooled in different environments. The cooling component 100 can change the direction of the current to make the cooling component 100 absorb or release heat to adapt to different working conditions of the battery cell 210 and ensure the normal operation of the battery cell 210.

[0094] In some embodiments, such as Figure 1 and Figure 2As shown, it also includes: a first substrate 50 and a second substrate 60, the first substrate 50 is thermally connected to the battery cell 210, the second substrate 60 is arranged on the side of the first substrate 50 away from the battery cell 210, the first substrate 50 and the second substrate 60 are arranged at intervals, the first cooling member 10, the second cooling member 20, the third cooling member and the fourth cooling member are all arranged between the first substrate 50 and the second substrate 60, and the first cooling member 10, the second cooling member 20, the third cooling member and the fourth cooling member are all thermally connected to the first substrate 50.

[0095] In this way, the first substrate 50 and the second substrate 60 can support the first cooling member 10, the second cooling member 20, the third cooling member and the fourth cooling member to prevent the first cooling member 10, the second cooling member 20, the third cooling member and the fourth cooling member from falling off, and the first substrate 50 is thermally conductive with the battery cell 210, and the first substrate 50 can also play a role in heat diffusion, so that the cooling component 100 can heat up or cool down the battery cells 210 in a larger range, thereby improving the stability and working range of the cooling component 100.

[0096] In a possible structural design, Figure 1 and Figure 2 As shown, the first substrate 50 and the second substrate 60 may include a plurality of sub-substrates, the sub-substrates of the first substrate 50 are arranged parallel to and spaced apart from the sub-substrates of the adjacent second substrate 60, and at least one of the first cooling member 10, the second cooling member 20, the third cooling member, or the fourth cooling member is arranged between the two sub-substrates. This facilitates the installation and processing of the cooling assembly 100.

[0097] In some embodiments, the first substrate 50 and the second substrate 60 are both made of ceramic.

[0098] In this way, the ceramic material has the characteristics of good insulation performance, high mechanical strength, and excellent thermal conductivity. The good insulation performance of the ceramic material can prevent the cooling component 100 from being damaged by short circuit. The high mechanical strength of the ceramic material can improve the supporting strength of the first substrate 50 and the second substrate 60 for the cooling component 100. The excellent thermal conductivity of the ceramic material can improve the heat dissipation efficiency of the heat dissipation component.

[0099] In another aspect of the present application, a battery pack 200 is provided, comprising a battery cell 210 and the above-mentioned cooling assembly 100; the battery cell 210 comprises opposite first and second electrode ends and a middle portion arranged between the first and second electrode ends; the first cooling member 10 in the cooling assembly 100 is arranged at least one of the first and second electrode ends, and the second cooling member 20 is arranged in the middle portion of the battery cell 210.

[0100] It can be understood that since the battery pack 200 provided in this application includes the cooling component 100 as described above, both can solve the same problems and achieve the same effects, and thus will not be elaborated herein one by one.

[0101] In some embodiments, as Figure 1 , Figure 2 and Figure 5 shown, the battery pack 200 includes: a plurality of battery cells 210 and a plurality of cooling components 100, and the plurality of cooling components 100 are respectively disposed on the plurality of battery cells 210.

[0102] In this way, the cooling component 100 can cool or heat up the plurality of battery cells 210 in the battery pack 200 to control the temperature of the battery pack 200 within the range in which the battery pack 200 can operate normally, and avoid the battery pack 200 from being unable to operate normally due to large temperature changes.

[0103] Among them, multiple groups of cooling components 100 can be connected to different power sources, or can be connected to the same power source to form a series structure or a parallel structure, and this application does not make any limitations in this regard.

[0104] In a possible structural design, the battery pack 200 further includes a temperature detection module and a control module. The temperature detection module is in thermal conduction with the battery cell 210 and is used to detect the temperature of the battery cell 210. The control module is electrically connected to the temperature detection module and the cooling component 100, and is used to control the current direction and current magnitude of the cooling component 100 and the battery pack 200.

[0105] This application also provides a method for controlling the temperature of the battery cell 210. The method for controlling the temperature of the battery cell 210 may include:

[0106] S1. The temperature detection module detects the temperature of the battery cell 210;

[0107] S2. If the temperature of the battery cell 210 is higher than or lower than the preset temperature range, a signal is sent to the control component;

[0108] S3a. If the temperature of the battery cell 210 is higher than the preset temperature range, the control component controls the cooling component 100 to start to cool the battery cell 210; if the temperature of the battery cell 210 is lower than the preset temperature range, the control component controls the cooling component 100 to start to heat up the battery cell 210.

[0109] In this way, the temperature of the battery cell 210 can be controlled by controlling the cooling component 100, and the battery cell 210 can be prevented from being unable to operate normally due to being too cold or too hot.

[0110] This application also provides another method for controlling the temperature of the battery cell 210. The method for controlling the temperature of the battery cell 210 may include:

[0111] S1. The temperature detection module detects the temperature of the battery cell 210;

[0112] S2. If the temperature of the battery cell 210 is higher than or lower than the preset temperature range, a signal is sent to the control component;

[0113] S3b. If the temperature of the battery cell 210 is higher than the preset temperature range, the control component controls the current of the battery pack 200 to decrease to cool the battery cell 210; if the temperature of the battery cell 210 is lower than the preset temperature range, the control component controls the current of the battery pack 200 to increase to heat up the battery cell 210.

[0114] In this way, the temperature of the battery pack 200 can be adjusted according to the magnitude of the charging or discharging current of the battery pack 200 without the participation of other components.

[0115] Among them, the above two methods can adjust the temperature of the battery cell 210 simultaneously or separately. The present application does not limit this.

[0116] In one aspect of the present application, an electrical device is provided, including an electrical appliance component and the above-mentioned battery pack 200, and the battery pack 200 is electrically connected to the electrical appliance component.

[0117] It can be understood that since the electrical device provided by the present application includes the battery pack 200 as described above, the two can solve the same problems and achieve the same effects, and the present application will not elaborate on them one by one here.

[0118] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A cooling assembly (100) for cooling a battery cell (210), the battery cell (210) comprising a first electrode end and a second electrode end opposite to each other and a middle portion arranged between the first electrode end and the second electrode end, characterized in that: The cooling assembly (100) comprises: A first cooling member (10) and a second cooling member (20), wherein the first cooling member (10) is arranged at at least one of the first electrode end and the second electrode end, and the second cooling member (20) is arranged in the middle of the battery cell (210), and the cooling efficiency of the first cooling member (10) is greater than the cooling efficiency of the second cooling member (20).

2. The cooling assembly (100) according to claim 1, characterized in that: The first cooling element (10) comprises: A first conductive member (11), a second conductive member (12), a third conductive member (13), a fourth conductive member (14), a first P-type semiconductor (15) and a first N-type semiconductor (16); The first conductive member (11) is thermally connected to the battery core (210); the second conductive member (12) is arranged on a side of the first conductive member (11) away from the battery core (210); the first P-type semiconductor (15) is arranged between the first conductive member (11) and the second conductive member (12), and is electrically connected to both the first conductive member (11) and the second conductive member (12); The third conductive member (13) is thermally connected to the battery core (210); the fourth conductive member (14) is arranged on a side of the third conductive member (13) away from the battery core (210); the first N-type semiconductor (16) is arranged between the third conductive member (13) and the fourth conductive member (14), and is electrically connected to both the third conductive member (13) and the fourth conductive member (14); The first conductive member (11) and the third conductive member (13) are arranged at intervals, and the second conductive member (12) and the fourth conductive member (14) are electrically connected.

3. The cooling assembly (100) according to claim 2, characterized in that: The second cooling member (20) comprises: a fifth conductive member (21), a sixth conductive member (22), a seventh conductive member (23), an eighth conductive member (24), a second P-type semiconductor (25) and a second N-type semiconductor (26); The fifth conductive member (21) is thermally connected to the battery core (210); the sixth conductive member (22) is arranged on a side of the fifth conductive member (21) away from the battery core (210); the second P-type semiconductor (25) is arranged between the fifth conductive member (21) and the sixth conductive member (22), and is electrically connected to both the fifth conductive member (21) and the sixth conductive member (22); The seventh conductive member (23) is thermally connected to the battery core (210); the second N-type semiconductor (26) is arranged between the seventh conductive member (23) and the eighth conductive member (24), and is electrically connected to both the seventh conductive member (23) and the eighth conductive member (24); the fifth conductive member (21) is spaced apart from the seventh conductive member (23), and the sixth conductive member (22) is electrically connected to the eighth conductive member (24); The contact area between the first P-type semiconductor (15) and the first conductive element (11) is A1, and the contact area between the first P-type semiconductor (15) and the second conductive element (12) is A2; the contact area between the first N-type semiconductor (16) and the third conductive element (13) is A3, and the contact area between the first N-type semiconductor (16) and the fourth conductive element (14) is A4; the contact area between the second P-type semiconductor (25) and the fifth conductive element (21) is A5, and the contact area between the second P-type semiconductor (25) and the sixth conductive element (22) is A6; the contact area between the second N-type semiconductor (26) and the seventh conductive element (23) is A7, and the contact area between the N-type semiconductor and the eighth conductive element (24) is A8; A1 / A2>A5 / A6, and / or; A3 / A4>A7 / A8.

4. The cooling assembly (100) according to claim 1, characterized in that: The cooling component (100) further comprises: a third cooling member, comprising: a ninth conductive member, a tenth conductive member, a third P-type semiconductor, an eleventh conductive member, a twelfth conductive member and a third N-type semiconductor; The ninth conductive member is thermally connected to the battery core (210), the tenth conductive member is arranged on a side of the ninth conductive member away from the battery core (210), the third P-type semiconductor is arranged between the ninth conductive member and the tenth conductive member, the third P-type semiconductor is electrically connected to both the ninth conductive member and the tenth conductive member, the contact area between the third P-type semiconductor and the ninth conductive member is A9, and the contact area between the third P-type semiconductor and the tenth conductive member is A10; The eleventh conductive member is thermally connected to the battery core (210), the twelfth conductive member is arranged on a side of the eleventh conductive member away from the battery core (210), the third N-type semiconductor is arranged between the eleventh conductive member and the twelfth conductive member, the third N-type semiconductor is electrically connected to both the eleventh conductive member and the twelfth conductive member, the ninth conductive member is spaced apart from the eleventh conductive member, and the tenth conductive member is electrically connected to the twelfth conductive member; A contact area between the third N-type semiconductor and the eleventh conductive element is A11, and a contact area between the third N-type semiconductor and the twelfth conductive element is A12; A1 / A2>A9 / A10>A5 / A6, and / or; A3 / A4>A11 / A12>A7 / A8.

5. The cooling assembly (100) according to claim 2, characterized in that: The cooling component (100) further comprises: a fourth cooling member, comprising: a thirteenth conductive member, a fourteenth conductive member, a fourth P-type semiconductor, a fifteenth conductive member, a sixteenth conductive member and a fourth N-type semiconductor; The thirteenth conductive member is thermally connected to the battery core (210); the fourteenth conductive member is arranged on a side of the thirteenth conductive member away from the battery core (210); the fourth P-type semiconductor is arranged between the thirteenth conductive member and the fourteenth conductive member; the fourth P-type semiconductor is electrically connected to both the thirteenth conductive member and the fourteenth conductive member; the contact area between the fourth P-type semiconductor and the thirteenth conductive member is A13; and the contact area between the fourth P-type semiconductor and the fourteenth conductive member is A14; The fifteenth conductive element is thermally connected to the battery core (210); the fourth N-type semiconductor is arranged between the fifteenth conductive element and the sixteenth conductive element, the fourth N-type semiconductor is electrically connected to both the fifteenth conductive element and the sixteenth conductive element, the thirteenth conductive element is spaced apart from the fifteenth conductive element, and the fourteenth conductive element is electrically connected to the sixteenth conductive element; A contact area between the fourth N-type semiconductor and the fifteenth conductive element is A15, and a contact area between the N-type semiconductor and the sixteenth conductive element is A16; A9 / A10>A13 / A14>A5 / A6, and / or; A11 / A12>A15 / A16>A7 / A8.

6. The cooling assembly (100) according to claim 3, characterized in that: A1 / A2>1, A3 / A4>1; A5 / A6≤1, A7 / A8≤1.

7. The cooling assembly (100) according to claim 3, characterized in that: The resistance value of the first P-type semiconductor (15) is smaller than the resistance value of the second P-type semiconductor (25), and / or the resistance value of the first N-type semiconductor (16) is smaller than the resistance value of the second N-type semiconductor (26).

8. The cooling assembly (100) according to claim 3, characterized in that: The number of the first cooling elements (10) is plural, and the plural first cooling elements (10) form two groups of first cooling elements (10), and the two groups of first cooling elements (10) are respectively a first group of cooling elements (70) and a second group of cooling elements (80); The first group of cooling members (70) includes at least one first cooling member (10), the second group of cooling members (80) includes at least one second cooling member (20), the first group of cooling members (70) is arranged at the first electrode end, and the second group of cooling members (80) is arranged at the second electrode end.

9. The cooling assembly (100) according to claim 8, characterized in that: The first group of cooling elements (70) includes a plurality of first cooling elements (10), and the second group of cooling elements (80) includes a plurality of first cooling elements (10); the number of the second cooling elements (20) is plural; The plurality of first cooling elements (10) of the first group of cooling elements (70), the plurality of first cooling elements (10) of the second group of cooling elements (80), and the plurality of second cooling elements (20) are all connected in series to form a series assembly.

10. The cooling assembly (100) according to claim 9, characterized in that: The two ends of the series assembly are respectively a first end (30) and a second end (40); The cooling assembly (100) further comprises: a first connecting terminal (31) and a second connecting terminal (32), wherein the first connecting terminal (31) and the second connecting terminal (32) are connected to the first end (30), the first connecting terminal (31) is used to connect the first end (30) to the positive electrode of a power source, and the second connecting terminal (32) is used to connect the first end (30) to the negative electrode of the power source; A third connecting terminal (41) and a fourth connecting terminal (42), wherein the third connecting terminal (41) and the fourth connecting terminal (42) are connected to the second end (40), the third connecting terminal (41) is used to connect the second end (40) to the positive pole of a power source, and the fourth connecting terminal (42) is used to connect the second end (40) to the negative pole of the power source.

11. The cooling assembly (100) according to claim 5, characterized in that: Also includes: A first substrate (50) and a second substrate (60), wherein the first substrate (50) is thermally connected to the battery cell (210), the second substrate (60) is arranged on a side of the first substrate (50) away from the battery cell (210), the first substrate (50) and the second substrate (60) are spaced apart, the first cooling member (10), the second cooling member (20), the third cooling member and the fourth cooling member are all arranged between the first substrate (50) and the second substrate (60), and the first cooling member (10), the second cooling member (20), the third cooling member and the fourth cooling member are all thermally connected to the first substrate (50).

12. The cooling assembly (100) according to claim 11, characterized in that: The first substrate (50) and the second substrate (60) are both made of ceramic.

13. A battery pack (200), characterized in that: Comprising a battery core (210) and a cooling assembly (100) according to any one of claims 1 to 12; The battery cell (210) comprises a first electrode end and a second electrode end that are opposite to each other, and a middle portion arranged between the first electrode end and the second electrode end; In the cooling assembly (100), the first cooling member (10) is arranged at at least one of the first electrode end and the second electrode end, and the second cooling member (20) is arranged in the middle of the battery core (210).

14. The battery pack (200) according to claim 13, characterized in that: The battery pack (200) comprises: A plurality of battery cells (210); A plurality of cooling components (100) are provided on the plurality of battery cells (210), respectively.

15. An electrical equipment, characterized in that: It comprises an electrical device and a battery pack (200) as claimed in claim 13 or 14, wherein the battery pack (200) is electrically connected to the electrical device.

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