Cooling assembly and battery pack

Abstract

The utility model discloses a cooling assembly and a battery pack. The cooling assembly comprises a first plate body and a plurality of second plate bodies, the second plate bodies are connected with the first plate body, the multiple second plate bodies are arranged at intervals, a heat dissipation space is formed between every two adjacent second plate bodies, and the heat dissipation spaces are used for placing battery cells; the first plate body is provided with a first direction and a second direction which are perpendicular to each other, a plurality of first flow channels and a plurality of second flow channels which are alternately arranged in the first direction are arranged in the first plate body, a guide-in cavity is formed in one end, in the second direction, of the first plate body, a guide-out cavity is formed in the other end of the first plate body, and the first flow channels communicate with the guide-in cavity. The plurality of second runners are respectively communicated with the leading-out cavity; a third flow channel is arranged in the second plate body, the input end of the third flow channel is communicated with the first flow channel, and the output end of the third flow channel is communicated with the second flow channel. Therefore, the second plate body is in contact with the side surface of the battery cell, heat on the side surface of the battery cell is taken away, and the temperature consistency of the battery cell in the height direction is improved.

Description

Technical Field

[0001] This application belongs to the field of cold plate technology, specifically relating to a cooling component and a battery pack. Background Technology

[0002] A liquid cooling plate is a device used for heat dissipation, typically found in high-performance computers, servers, and other applications requiring massive computation and data processing. Liquid cooling plates lower the chip temperature by introducing water or other liquids into the heat sink, using the fluid to cool the silicon wafer. With the increasing energy density and power density of batteries in new energy vehicles, and the larger charge / discharge rates, battery heat generation is also increasing. Traditional battery cooling methods such as natural cooling or air cooling are no longer sufficient, and water cooling is gradually becoming the mainstream heat dissipation method.

[0003] In related technologies, liquid cooling plates are typically placed on the bottom surface of the battery cell. Heat generated during battery operation is conducted to the liquid cooling plate through the bottom surface and then carried away by the internal coolant. However, this arrangement results in heat generated at the top and middle of the battery not being effectively conducted to the bottom, leading to a significant temperature difference along the battery's height, which is detrimental to battery safety. Utility Model Content

[0004] This application aims to provide a cooling component and battery pack that can solve the problem of large temperature differences in the height direction of the battery.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application propose a cooling assembly, comprising: a first plate and a plurality of second plates; the second plates are connected to the first plate, the plurality of second plates are spaced apart, and a heat dissipation space is formed between adjacent two second plates, the heat dissipation space being used to place a battery cell; the first plate has a first direction and a second direction perpendicular to each other, the first plate is provided with a plurality of first channels and a plurality of second channels alternately arranged along the first direction, one end of the first plate along the second direction is provided with an inlet cavity, the other end is provided with an outlet cavity, the plurality of first channels are respectively connected to the inlet cavity, and the plurality of second channels are respectively connected to the outlet cavity; the second plate is provided with a third channel, the input end of the third channel is connected to the first channel, and the output end of the third channel is connected to the second channel.

[0007] Optionally, the second plate body is provided with a plurality of the third flow channels; the plurality of third flow channels are arranged at intervals along the first direction.

[0008] Optionally, the first plate body includes a first sub-plate body, an inlet plate, and an outlet plate; the inlet plate is connected to one end of the first sub-plate body along the second direction, and the outlet plate is connected to the other end of the first sub-plate body along the second direction; the first sub-plate body is provided with a plurality of first flow channels and a plurality of second flow channels arranged alternately at intervals; the inlet plate and the first sub-plate body enclose the inlet cavity, and the outlet plate and the first sub-plate body enclose the outlet cavity.

[0009] Optionally, the third flow channel includes a first sub-flow channel, a second sub-flow channel, and a third sub-flow channel; the first sub-flow channel and the second sub-flow channel are spaced apart along the first direction, and both the first sub-flow channel and the second sub-flow channel extend along a third direction, which is perpendicular to the first direction and the second direction, respectively; one end of the first sub-flow channel is connected to the first flow channel, one end of the second sub-flow channel is connected to the second flow channel, and the other end of the first sub-flow channel is connected to the other end of the second sub-flow channel through the third sub-flow channel.

[0010] Optionally, the second plate includes a second sub-plate and an end cap; one end of the second sub-plate is connected to the first plate, and the other end of the second sub-plate is connected to the end cap; the second sub-plate has a first sub-channel and a second sub-channel spaced apart along the first direction, and the end cap has the third sub-channel.

[0011] Optionally, the second plate has a first end and a second end disposed opposite to each other along the third direction, the first end being connected to the first plate; the flow cross-sectional area of ​​the first sub-channel gradually increases from the first end to the second end; and / or, the flow cross-sectional area of ​​the second sub-channel gradually increases from the first end to the second end.

[0012] Optionally, along the second direction, the spacing between two adjacent second plates is equal.

[0013] Secondly, embodiments of this application propose a battery pack, including a battery cell and a cooling assembly as described in the above embodiments, wherein the battery cell is disposed in the heat dissipation space.

[0014] Optionally, the dimension of the first plate along the first direction is a, the dimension of the second plate along the first direction is b, and the dimension of the battery cell along the first direction is c, satisfying: 0.8c≤a≤1.2c; and / or, 0.8c≤b≤1.2c; the first direction is perpendicular to the extension direction of the first flow channel.

[0015] Optionally, it also includes a thermally conductive layer; the thermally conductive layer is disposed between the battery cell and the second plate.

[0016] In the embodiments of this application, by connecting a second plate to a first plate, multiple second plates are spaced apart, forming a heat dissipation space between adjacent second plates, which is used to place the battery cell. The first plate has a first direction and a second direction perpendicular to each other. The first plate has multiple first flow channels and multiple second flow channels arranged alternately along the first direction. One end of the first plate along the second direction has an inlet cavity, and the other end has an outlet cavity. The multiple first flow channels communicate with the inlet cavity, and the multiple second flow channels communicate with the outlet cavity. The second plate has a third flow channel, with its input end communicating with the first flow channel and its output end communicating with the second flow channel. In this way, the battery cell can be placed between adjacent second plates, allowing the second plates to cool the battery cell from the side. The cooling medium is diverted from the inlet cavity to the multiple first flow channels, and then flows into the third flow channel, thereby carrying away the heat from the battery cell, which is then discharged through the outlet cavity, thus improving the temperature uniformity of the battery cell in the height direction. Furthermore, the cooling assembly of this application can also be applied to battery packs composed of different numbers of battery cells, exhibiting scalability and wide applicability.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of a cooling assembly according to an embodiment of this application;

[0020] Figure 2 It is along Figure 1 Sectional view of line AA in the middle;

[0021] Figure 3 It is along Figure 1 Sectional view of the middle BB line;

[0022] Figure 4 It is along Figure 1 A cross-sectional view of the CC line;

[0023] Figure 5 This is an assembly diagram of the liquid inlet plate and the first sub-plate according to an embodiment of this application;

[0024] Figure 6 This is an assembly diagram of the liquid outlet plate and the first sub-plate body according to an embodiment of this application;

[0025] Figure 7 It is along Figure 1 Sectional view of the DD line;

[0026] Figure 8 This is a schematic diagram of an end cap according to an embodiment of this application;

[0027] Figure 9 This is an assembly diagram of a portion of the structure of the first plate and a portion of the structure of the second plate according to an embodiment of this application.

[0028] Figure 10 This is a schematic diagram of a battery pack according to an embodiment of this application.

[0029] Figure label:

[0030] 1-Heat dissipation space; 2-First plate; 21-First sub-plate; 22-Inlet plate; 23-Outlet plate; 24-First flow channel; 25-Second flow channel; 26-Inlet cavity; 27-Outlet cavity; 28-Inlet; 29-Outlet; 3-Second plate; 31-Third flow channel; 311-First sub-flow channel; 312-Second sub-flow channel; 313-Third sub-flow channel; 32-Second sub-plate; 33-End cap; 4-First end; 5-Second end; 6-Cell; Z-First direction; Y-Second direction; X-Third direction. Detailed Implementation

[0031] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0032] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] The cooling components and battery packs provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0036] like Figures 1 to 4 As shown, a cooling assembly according to some embodiments of this application includes: a first plate 2 and a plurality of second plates 3; the second plates 3 are connected to the first plate 2, the plurality of second plates 3 are spaced apart, and a heat dissipation space 1 is formed between two adjacent second plates 3, the heat dissipation space 1 is used to place the battery cell 6; the first plate 2 has a first direction Z and a second direction Y that are perpendicular to each other, the first plate 2 is provided with a plurality of first flow channels 24 and a plurality of second flow channels 25 arranged alternately along the first direction Z, the first plate 2 is provided with an inlet cavity 26 at one end along the second direction Y, and an outlet cavity 27 at the other end, the plurality of first flow channels 24 are respectively connected to the inlet cavity 26, and the plurality of second flow channels 25 are respectively connected to the outlet cavity 27; the second plate 3 is provided with a third flow channel 31, the input end of the third flow channel 31 is connected to the first flow channel 24, and the output end of the third flow channel 31 is connected to the second flow channel 25.

[0037] In this embodiment, by connecting the second plate 3 to the first plate 2, multiple second plates 3 are spaced apart, and a heat dissipation space 1 is formed between two adjacent second plates 3. The heat dissipation space 1 is used to place the battery cell 6. The first plate 2 has a first direction Z and a second direction Y that are perpendicular to each other. The first plate 2 is provided with multiple first flow channels 24 and multiple second flow channels 25 arranged alternately along the first direction Z. One end of the first plate 2 along the second direction Y is provided with an inlet cavity 26, and the other end is provided with an outlet cavity 27. The multiple first flow channels 24 are respectively connected to the inlet cavity 26, and the multiple second flow channels 25 are respectively connected to the outlet cavity 27. The second plate 3 is provided with a third flow channel 31. The input end of the third flow channel 31 is connected to the first flow channel 24, and the output end of the third flow channel 31 is connected to the second flow channel 25. In this way, the battery cell 6 can be positioned between two adjacent second plates 3, allowing the second plates 3 to cool the battery cell from its side. The cooling medium is diverted from the inlet cavity 26 into multiple first channels 24, and then flows into the third channel 31, thereby removing heat from the battery cell 6 and dissipating it through the outlet cavity 27. This improves the temperature uniformity of the battery cell 6 in the height direction. Furthermore, the cooling assembly of this application can also be applied to battery packs composed of different numbers of battery cells 6, exhibiting scalability and wide applicability.

[0038] In some embodiments, such as Figure 1 and Figure 10 As shown, the battery cell 6 can be placed on both sides of the second plate 3 at the end; exemplarily, the battery cell 6 can be placed... Figure 10 The leftmost second plate 3 shown in the diagram has its left and right sides, with the right side being the heat dissipation space 1 formed by the leftmost second plate 3 and the adjacent second plate 3; the battery cell can also be placed in... Figure 10 The left and right sides of the rightmost second plate 3 shown in the diagram.

[0039] In some other embodiments, such as Figures 1 to 4 As shown, the first body also has an outlet 29 and an inlet 28. The inlet 28 is connected to the inlet cavity 26, and the outlet 29 is connected to the outlet cavity 27. In this way, the cooling medium can enter the inlet cavity 26 through the inlet 28 and flow out from the outlet 29, thereby forming a complete loop.

[0040] In other embodiments, such as Figure 1 and Figure 2 As shown, a through hole is provided on the side wall of the first flow channel 24 near the inlet 28, and the first flow channel 24 communicates with the inlet cavity 26 through the through hole; as Figure 1 and Figure 4 As shown, a through hole is provided on the side wall of the second flow channel 25 near the outlet 29, and the second flow channel 25 communicates with the outlet cavity 27 through the through hole; as shown Figure 3As shown, the first flow channel 24 and the second flow channel 25 located in the middle section are independent of each other and are not connected.

[0041] It should be noted that, as Figure 1 and Figure 10 As shown, the first direction Z is the height direction of the cell 6, the second direction Y is the direction in which the second plate 3 is spaced apart, and the third direction X is the direction in which the third flow channel 31 extends; the first direction Z, the second direction Y and the third direction X are perpendicular to each other.

[0042] Optionally, such as Figure 1 , Figure 7 and Figure 10 As shown, the second plate 3 is provided with multiple third flow channels 31; the multiple third flow channels 31 are arranged at intervals along the first direction Z.

[0043] In this embodiment, multiple third flow channels 31 arranged at intervals along the first direction Z are provided in the second plate 3. This allows for simultaneous cooling and heat dissipation of the sides of the battery cell 6 through the multiple third flow channels 31, thereby improving heat dissipation efficiency.

[0044] In some embodiments, the number of third channels 31 is half the sum of the number of first channels 24 and second channels 25; for example, as Figure 2 As shown, the sum of the number of the first flow channel 24 and the second flow channel 25 is 12; Figure 7 As shown, the number of third channels 31 is set to 6 to match the number of first channels 24 and second channels 25. Of course, the sum of the number of first channels 24 and second channels 25 can also be other values, and this embodiment of the application does not impose any restrictions.

[0045] In some other embodiments, such as Figures 2 to 9 As shown, each third flow channel 31 connects to a second flow channel 25 and a first flow channel 24 to form a cooling channel. Thus, for a second plate 3, each second plate 3 has 6 cooling channels, and the 6 cooling channels work simultaneously, thereby improving heat dissipation efficiency.

[0046] Optionally, Figure 1 , Figure 5 and Figure 6 As shown, the first plate 2 includes a first sub-plate 21, an inlet plate 22, and an outlet plate 23; the inlet plate 22 is connected to one end of the first sub-plate 21 along the second direction Y, and the outlet plate 23 is connected to the other end of the first sub-plate 21 along the second direction Y. The first sub-plate 21 is provided with a plurality of first flow channels 24 and a plurality of second flow channels 25 arranged alternately at intervals; the inlet plate 22 and the first sub-plate 21 enclose an inlet cavity 26, and the outlet plate 23 and the first sub-plate 21 enclose an outlet cavity 27.

[0047] In this embodiment, the inlet plate 22 is connected to one end of the first sub-plate 21 along the second direction Y, and the outlet plate 23 is connected to the other end of the first sub-plate 21 along the second direction Y. The first sub-plate 21 has a plurality of first flow channels 24 and a plurality of second flow channels 25 arranged alternately at intervals. The inlet plate 22 and the first sub-plate 21 enclose an inlet cavity 26, and the outlet plate 23 and the first sub-plate 21 enclose an outlet cavity 27. This allows the first sub-plate 21, the inlet plate 22, and the outlet plate 23 to be processed separately during manufacturing, thereby improving production efficiency.

[0048] In some embodiments, the first sub-plate 21, the inlet plate 22, and the outlet plate 23 can be manufactured using a profile stamping process. This facilitates welding connections between the first sub-plate 21 and the inlet plate 22, as well as between the first sub-plate 21 and the outlet plate 23. Furthermore, the profile stamping process is easy to process, provides good strength, and has a lower cost.

[0049] Optionally, such as Figure 7 and Figure 8 As shown, the third flow channel 31 includes a first sub-flow channel 311, a second sub-flow channel 312, and a third sub-flow channel 313; the first sub-flow channel 311 and the second sub-flow channel 312 are spaced apart along the first direction Z, and both the first sub-flow channel 311 and the second sub-flow channel 312 extend along the third direction X, which is perpendicular to the first direction Z and the second direction Y, respectively; one end of the first sub-flow channel 311 is connected to the first flow channel 24, one end of the second sub-flow channel 312 is connected to the second flow channel 25, and the other end of the first sub-flow channel 311 is connected to the other end of the second sub-flow channel 312 through the third sub-flow channel 313.

[0050] In this embodiment, the first sub-channel 311 and the second sub-channel 312 are spaced apart along the first direction Z. Both the first sub-channel 311 and the second sub-channel 312 extend along a third direction X, which is perpendicular to the first direction Z and the second direction Y, respectively. One end of the first sub-channel 311 is connected to the first channel 24, one end of the second sub-channel 312 is connected to the second channel 25, and the other end of the first sub-channel 311 is connected to the other end of the second channel 312 through the third sub-channel 313. In this way, the cooling medium flows in from the first channel 24, enters the first sub-channel 311 and the third sub-channel 313, then flows from the second sub-channel 312 into the second channel 25, and finally exits from the outlet 29, so as to improve the space utilization rate of the second plate 3 in the first direction Z.

[0051] Optionally, such as Figure 7 and Figure 8As shown, the second plate 3 includes a second sub-plate 32 and an end cap 33; one end of the second sub-plate 32 is connected to the first plate 2, and the other end of the second sub-plate 32 is connected to the end cap 33; the second sub-plate 32 is provided with a first sub-flow channel 311 and a second sub-flow channel 312 spaced apart along the first direction Z, and the end cap 33 is provided with a third sub-flow channel 313.

[0052] In this embodiment, one end of the second sub-plate 32 is connected to the first plate 2, and the other end of the second sub-plate 32 is connected to the end cap 33. The second sub-plate 32 is provided with a first sub-flow channel 311 and a second sub-flow channel 312 spaced apart along a first direction Z, and the end cap 33 is provided with a third sub-flow channel 313. This allows the second sub-plate 32 and the end cap 33 to be processed separately during manufacturing, thereby improving production efficiency.

[0053] In some embodiments, the second sub-plate 32 and the end cap 33 may be manufactured using a profile stamping process. This facilitates the welding connection between the second sub-plate 32 and the end cap 33; furthermore, the profile stamping process is easy to process, provides good strength, and has a lower cost.

[0054] In some embodiments, such as Figure 8 As shown, the end cap 33 is provided with a plurality of third sub-channels 313 spaced apart along the first direction Z. The number of third sub-channels 313 is half the sum of the number of first sub-channels 311 and second sub-channels 312.

[0055] Optionally, such as Figure 1 As shown, the second plate 3 has a first end 4 and a second end 5 disposed opposite to each other along a third direction X. The first end 4 is connected to the first plate 2. From the first end 4 to the second end 5, the flow cross-sectional area of ​​the first sub-channel 311 gradually increases.

[0056] In this embodiment, the first end 4 is connected to the first plate 2; the flow cross-sectional area of ​​the first sub-channel 311 gradually increases from the first end 4 to the second end 5. This ensures the uniformity of the flow rate of the cooling medium in the first sub-channel 311, thereby improving the uniformity of heat dissipation of the cooling medium in the first sub-channel 311.

[0057] Specifically, while maintaining a constant flow rate of the cooling medium entering the first flow channel 24, since the extension direction of the first flow channel 24 intersects with the extension direction of the first sub-flow channel 311, the cooling medium will turn at the junction of the first flow channel 24 and the first sub-flow channel 311, resulting in energy loss. This causes the flow rate of the cooling medium entering the first sub-flow channel 311 to be lower than the initial flow rate of the cooling medium entering the first flow channel 24. Furthermore, as the flow distance of the cooling medium in the first sub-flow channel 311 increases, the flow rate of the cooling medium at the second end 5 is lower than the flow rate at the first end 4, resulting in different flow rates of the cooling medium before and after in the first sub-flow channel 311.

[0058] This application changes the flow cross-sectional area so that the flow cross-sectional area of ​​the first sub-channel 311 at the second end 5 is larger than that at the first end 4. This ensures that even if the flow velocity of the cooling medium at the second end 5 is lower than that at the first end 4, the flow rate of the first sub-channel 311 at the second end 5 can still be comparable to that of the first sub-channel 311 at the first end 4 due to the larger flow cross-sectional area of ​​the first sub-channel 311. This improves the uniformity of heat dissipation and the heat exchange effect of the cooling medium in the first sub-channel 311.

[0059] In some embodiments, the flow cross-sectional area of ​​the first sub-channel 311 at the first end 4 and the flow cross-sectional area at the second end 5 can be adjusted by simulation calculation to achieve uniform flow of the cooling medium in the first sub-channel 311.

[0060] It should be noted that the flow cross-sectional area of ​​the first sub-channel 311 is the cross-sectional area of ​​the first sub-channel 311 along the direction X perpendicular to the third direction.

[0061] Optionally, the flow cross-sectional area of ​​the second sub-channel 312 gradually increases from the first end 4 to the second end 5.

[0062] In this embodiment, the cross-sectional area of ​​the second sub-channel 312 gradually increases from the first end 4 to the second end 5. This ensures the uniformity of the flow rate of the cooling medium in the second sub-channel 312, thereby improving the uniformity of heat dissipation of the cooling medium in the second sub-channel 312.

[0063] Specifically, the effect of increasing the flow cross-sectional area of ​​the second sub-channel 312 is the same as the effect of increasing the flow cross-sectional area of ​​the first sub-channel 311, and will not be described again in this embodiment.

[0064] In some embodiments, the flow cross-sectional area of ​​the second sub-channel 312 at the first end 4 and the flow cross-sectional area at the second end 5 can be adjusted by simulation calculation to achieve uniform flow of the cooling medium in the second sub-channel 312.

[0065] It should be noted that the flow cross-sectional area of ​​the second sub-channel 312 is the cross-sectional area of ​​the second sub-channel 312 along the direction X perpendicular to the third.

[0066] It should be noted that the flow cross-sectional area of ​​the first sub-channel 311 at the second end 5 and the flow cross-sectional area of ​​the second sub-channel 312 at the second end 5 can be the same or different.

[0067] Optionally, such as Figure 1 and Figure 10 As shown, along the second direction Y, the spacing between two adjacent second plates 3 is equal.

[0068] In this embodiment, the spacing between adjacent second plates 3 is set to be equal. This allows the same number of battery cells 6 to be accommodated between two adjacent second plates 3, thereby facilitating the arrangement of the cooling assembly.

[0069] Secondly, this application provides a battery pack including a battery cell 6 and a cooling assembly as described in the above embodiments, wherein the battery cell 6 is disposed in a heat dissipation space 1.

[0070] In this embodiment, by connecting the second plate 3 to the first plate 2, multiple second plates 3 are spaced apart, and a heat dissipation space 1 is formed between two adjacent second plates 3. The heat dissipation space 1 is used to place the battery cell 6. The first plate 2 has a first direction Z and a second direction Y that are perpendicular to each other. The first plate 2 is provided with multiple first flow channels 24 and multiple second flow channels 25 arranged alternately along the first direction Z. One end of the first plate 2 along the second direction Y is provided with an inlet cavity 26, and the other end is provided with an outlet cavity 27. The multiple first flow channels 24 are respectively connected to the inlet cavity 26, and the multiple second flow channels 25 are respectively connected to the outlet cavity 27. The second plate 3 is provided with a third flow channel 31. The input end of the third flow channel 31 is connected to the first flow channel 24, and the output end of the third flow channel 31 is connected to the second flow channel 25. In this way, the battery cell 6 can be positioned between two adjacent second plates 3, allowing the second plates 3 to cool the battery cell from its side. The cooling medium is diverted from the inlet cavity 26 into multiple first channels 24, and then flows into the third channel 31, thereby removing heat from the battery cell 6 and dissipating it through the outlet cavity 27. This improves the temperature uniformity of the battery cell 6 in the height direction. Furthermore, the cooling assembly of this application can also be applied to battery packs composed of different numbers of battery cells 6, exhibiting scalability and wide applicability.

[0071] Optionally, such as Figure 10 As shown, the dimension of the first plate 2 along the first direction Z is a, and the dimension of the battery cell 6 along the first direction Z is c, satisfying: 0.8c≤a≤1.2c.

[0072] In this embodiment, the dimension of the first plate 2 along the first direction Z is set to 'a', and the dimension of the battery cell 6 along the first direction Z is set to 'c', satisfying the condition: 0.8c ≤ a ≤ 1.2c. Thus, by setting the dimension 'a' of the first plate 2 along the first direction Z within a certain range of the dimension 'c' of the battery cell 6 along the first direction Z, the problem of material waste due to an excessively large dimension 'a' of the first plate 2 along the first direction Z is avoided, as is the problem of poor heat dissipation due to an excessively small dimension 'a' of the first plate 2 along the first direction Z.

[0073] Optionally, such as Figure 10 As shown, the dimension of the second plate 3 along the first direction Z is b, and the dimension of the battery cell 6 along the first direction Z is c, satisfying: 0.8c≤b≤1.2c; the first direction Z is perpendicular to the extension direction of the first flow channel 24.

[0074] In this embodiment, the dimension of the second plate 3 along the first direction Z is set to b, and the dimension of the battery cell 6 along the first direction Z is set to c, satisfying: 0.8c ≤ a ≤ 1.2c. Thus, by setting the dimension b of the second plate 3 along the first direction Z within a certain range of the dimension c of the battery cell 6 along the first direction Z, the problem of material waste due to an excessively large dimension b of the second plate 3 along the first direction Z is avoided, as is the problem of poor heat dissipation due to an excessively small dimension b of the second plate 3 along the first direction Z.

[0075] Optionally, it also includes a thermally conductive layer; the thermally conductive layer is disposed between the battery cell 6 and the second plate 3.

[0076] In this embodiment, a thermally conductive layer is provided between the battery cell 6 and the second plate 3. This improves the thermal conductivity between the battery cell 6 and the second plate 3, thereby enhancing the heat dissipation effect.

[0077] It should be noted that the thermally conductive layer can be a thermally conductive medium with good thermal conductivity, such as thermally conductive silicone, thermally conductive grease, graphite film, or thermally conductive pads. This reduces the contact thermal resistance between the second plate 3 and the battery cell 6, thereby improving thermal conductivity.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0079] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A cooling assembly, characterized in that, The application relates to a heat dissipation device. The heat dissipation device comprises a first plate body (2) and a plurality of second plate bodies (3); the second plate bodies (3) are connected with the first plate body (2), the plurality of second plate bodies (3) are arranged at intervals, and a heat dissipation space (1) is formed between two adjacent second plate bodies (3) and used for placing an electric core (6); the first plate body (2) has a first direction (Z) and a second direction (Y) perpendicular to each other, a plurality of first flow channels (24) and a plurality of second flow channels (25) are arranged in the first plate body (2) and alternately arranged along the first direction (Z); one end of the first plate body (2) along the second direction (Y) is provided with an inlet cavity (26), and the other end is provided with an outlet cavity (27); the plurality of first flow channels (24) are respectively communicated with the inlet cavity (26), and the plurality of second flow channels (25) are respectively communicated with the outlet cavity (27); a third flow channel (31) is arranged in the second plate body (3), an input end of the third flow channel (31) is communicated with the first flow channel (24), and an output end of the third flow channel (31) is communicated with the second flow channel (25). A plurality of third flow channels (31) are arranged in the second plate body (3); and the plurality of third flow channels (31) are arranged at intervals along the first direction (Z). The first plate body (2) comprises a first sub-plate body (21), a liquid inlet plate (22) and a liquid outlet plate (23).

2. Cooling assembly according to claim 1, characterized in that The liquid inlet plate (22) is connected with one end of the first sub-plate body (21) along the second direction (Y), the liquid outlet plate (23) is connected with the other end of the first sub-plate body (21) along the second direction (Y), a plurality of first flow channels (24) and a plurality of second flow channels (25) are arranged in the first sub-plate body (21) and arranged at intervals alternately; the liquid inlet plate (22) and the first sub-plate body (21) form the inlet cavity (26), and the liquid outlet plate (23) and the first sub-plate body (21) form the outlet cavity (27).

3. The cooling assembly of claim 1, wherein, The third flow channel (31) comprises a first sub-flow channel (311), a second sub-flow channel (312) and a third sub-flow channel (313). The first sub-flow channel (311) and the second sub-flow channel (312) are arranged at intervals along the first direction (Z), and the first sub-flow channel (311) and the second sub-flow channel (312) extend along a third direction (X) which is perpendicular to the first direction (Z) and the second direction (Y) respectively.

4. The cooling assembly of claim 1, wherein, One end of the first sub-flow channel (311) is communicated with the first flow channel (24), one end of the second sub-flow channel (312) is communicated with the second flow channel (25), and the other end of the first sub-flow channel (311) is communicated with the other end of the second sub-flow channel (312) through the third sub-flow channel (313). The second plate body (3) comprises a second sub-plate body (32) and an end cover (33). ​ 5. Cooling assembly according to claim 4, characterized in that ​ One end of the second sub-plate body (32) is connected with the first plate body (2), and the other end of the second sub-plate body (32) is connected with the end cover (33); the second sub-plate body (32) is provided with the first sub-flow channel (311) and the second sub-flow channel (312) which are arranged at intervals along the first direction (Z), and the end cover (33) is provided with the third sub-flow channel (313).

6. The cooling assembly of claim 4, wherein, The second plate body (3) has a first end (4) and a second end (5) which are oppositely arranged along the third direction (X), and the first end (4) is connected with the first plate body (2); From the first end (4) to the second end (5), the flow passage cross-sectional area of the first sub-flow channel (311) gradually increases; and / or, from the first end (4) to the second end (5), the flow passage cross-sectional area of the second sub-flow channel (312) gradually increases.

7. Cooling assembly according to any of claims 1-6, characterized in that Along the second direction (Y), the spacing between two adjacent second plate bodies (3) is equal.

8. A battery pack, characterized by, The cooling assembly comprises an electric core (6) and the cooling assembly of any one of claims 1-7, and the electric core (6) is arranged in the heat dissipation space (1).

9. The battery pack of claim 8, wherein, The size of the first plate body (2) along the first direction (Z) is a, the size of the second plate body (3) along the first direction (Z) is b, and the size of the electric core (6) along the first direction (Z) is c, and the following conditions are met: 0.8c≤a≤1.2c; and / or, 0.8c≤b≤1.2c; and the first direction (Z) is perpendicular to the extension direction of the first flow channel (24).

10. The battery pack of claim 9, wherein, Further comprising a heat-conducting layer; the heat-conducting layer is arranged between the electric core (6) and the second plate body (3).

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