A heat dissipation device and battery module

Abstract

This utility model discloses a heat dissipation device and a battery module. The heat dissipation device includes at least one heat dissipation plate, which is arranged in the middle region of a heat dissipation group formed by stacking multiple objects to be cooled. The heat dissipation plate includes a heat dissipation body and at least one heat dissipation fin connected to the outside of the heat dissipation body. The heat dissipation body is configured to be clamped by the multiple objects to be cooled so as to contact the surfaces of the multiple objects to be cooled. The heat dissipation fin is configured not to contact the surfaces of the objects to be cooled, and the size of the heat dissipation fin gradually increases in the direction away from the heat dissipation body. Taking a battery module as an example, when in use, the heat dissipation device is placed in the middle region of the battery module. The heat from the highest temperature region of the battery cell will be dissipated outward after passing through the heat dissipation body and the heat dissipation fin in sequence, thereby improving the heat dissipation efficiency of the battery cell, which is beneficial to improving the temperature uniformity of all battery cells, and thus beneficial to improving the service life of the battery module.

Description

Technical Field

[0001] This utility model relates to the technical field of heat dissipation devices, and in particular to a heat dissipation device and a battery module. Background Technology

[0002] With the increasing demand for longer battery life in end-user electronic products (such as laptops and mobile phones), the internal cells of the battery modules used in these products are mostly assembled into the casing of the electronic products using a series or parallel configuration. When multiple series or parallel cells are stacked together, during the charging and discharging process, the cells stacked in the middle region are less conducive to heat dissipation. Therefore, the temperature of one or more cells in the middle region of the cell pack is often the highest. The cells with higher temperatures experience the fastest capacity decay. After a certain number of cycles, the cells in the middle region, due to their low capacity, will affect the consistency of the battery pack's charging and discharging, leading to faster capacity decay. This affects the product's battery life and the consumer experience. Utility Model Content

[0003] This utility model provides a battery heat dissipation device and a battery module, which mainly solves the problems existing in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A heat dissipation device includes at least one heat dissipation plate, which is arranged in the middle region of a heat dissipation assembly formed by stacking a plurality of objects to be cooled. The heat dissipation plate includes a heat dissipation body and at least one heat dissipation fin connected to the outside of the heat dissipation body. The heat dissipation body is configured to be clamped by the plurality of objects to be cooled so as to contact the surfaces of the plurality of objects to be cooled. The heat dissipation fin is configured not to contact the surfaces of the objects to be cooled, and the size of the heat dissipation fin gradually increases in the direction away from the heat dissipation body.

[0006] In one of the technical solutions, the heat dissipation device includes a plurality of heat dissipation plates, and at least one heat-conducting element is connected between each pair of adjacent heat dissipation plates.

[0007] In one of the technical solutions, the heat-conducting component connects the heat sinks of two adjacent heat sinks.

[0008] In one of the technical solutions, the heat dissipation body has heat sinks extending from at least two opposite ends, and two adjacent heat sinks are connected to the heat-conducting element at their opposite ends.

[0009] In one of the technical solutions, the heat sink includes four heat sinks, which together surround the outer periphery of the heat sink body.

[0010] In one of the technical solutions, the thickness of the heat dissipation body is between 0.05mm and 0.1mm.

[0011] In one of the technical solutions, the heat sink is an aluminum nitride ceramic plate, a diamond plate, or a graphene composite plate.

[0012] In one of the technical solutions, the distance between the heat dissipation body and the edge of the object to be dissipated is 2mm-5mm.

[0013] In one of the technical solutions, the heat sink has a triangular structure.

[0014] This application also provides a battery module, which includes a plurality of battery cells and a heat dissipation device as described in any of the above claims, wherein at least one heat dissipation plate is provided in the middle region of the plurality of battery cells and is held by the battery cells.

[0015] Compared with the prior art, the heat dissipation device provided by this utility model has at least the following beneficial effects:

[0016] The heat dissipation system can be used with a battery module (which includes multiple cells, each of which can be understood as an object to be cooled) as an example. In use, the heat dissipation device of this solution is placed in the middle area of ​​the battery module, and the cells located in the middle area hold the heat dissipation body of the heat dissipation plate. At this time, the heat from the highest temperature area of ​​one or more cells in the middle area will be dissipated outward after passing through the heat dissipation body and the heat dissipation plate in sequence, thereby improving the heat dissipation efficiency of the cells in the middle area that heat up faster. This is beneficial to improving the temperature uniformity of all cells, and thus to improving the service life of the battery module. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a heat dissipation device provided in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the structure of a heat dissipation device and a battery cell in contact, provided in an embodiment of this application.

[0020] Figure 3 A schematic diagram of a heat dissipation device provided in an embodiment of this application when placed in the middle region of multiple battery cells;

[0021] Figure 4 for Figure 3 The diagram shows the structure after a heat-conducting component is installed inside the heat dissipation device.

[0022] Figure label:

[0023] 1. Heat dissipation device; 11. Heat dissipation plate; 111. Heat dissipation body; 112. Heat dissipation fins; 12. Thermal conductive components; 2. Battery cell. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0026] It should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to 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.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] Please see Figure 1This utility model provides a heat dissipation device 1, which mainly includes at least one heat dissipation plate 11. The heat dissipation plate 11 can be a plate with high thermal conductivity, such as an aluminum nitride ceramic plate, a diamond plate, or a graphene composite plate. The heat dissipation plate 11 is used to be arranged in the middle region of a heat dissipation group formed by stacking multiple objects to be cooled. Specifically, the heat dissipation group includes at least two stacked objects to be cooled, such that at least one heat dissipation plate 11 is provided in the middle region of the heat dissipation group. The heat dissipation plate 11 specifically includes a heat dissipation body 111 and at least one heat dissipation fin 112 connected to the outside of the heat dissipation body 111. The heat dissipation body 111 is configured to be clamped by multiple objects to be cooled so as to contact the surfaces of the multiple objects to be cooled. The heat dissipation fin 112 is configured not to contact the surfaces of the objects to be cooled, and the size of the heat dissipation fin 112 gradually increases in the direction away from the heat dissipation body 111.

[0030] Specifically, the heat dissipation system can take a battery module (which includes multiple cells 2, each of which can be understood as an object to be cooled) as an example. In use, the heat dissipation device 1 of this solution is placed in the middle area of ​​the battery module, and the cells 2 located in the middle area hold the heat dissipation body 111 of the heat dissipation plate 11. At this time, the heat from the highest temperature area of ​​one or more cells 2 located in the middle area will be dissipated outward after passing through the heat dissipation body 111 and the heat dissipation fins 112 in sequence, thereby improving the heat dissipation efficiency of the cells 2 located in the middle area that heat up faster. This is beneficial to improving the temperature uniformity of all cells 2, and thus beneficial to improving the service life of the battery module.

[0031] Please see Figure 2Because the heat dissipation efficiency of the edge area of ​​the battery cell 2 is relatively faster than that of the middle area, a distance A is left between the heat dissipation body 111 and the edge of the battery cell 2. This distance A is preferably 2mm-5mm. This design is conducive to the heat of the highest temperature in the middle of the battery cell 2 being dissipated to the outside as quickly as possible. Moreover, the reason why the heat sink 112 is designed not to contact the surface of the battery cell 2 is also to dissipate the heat of the highest temperature in the middle of the battery cell 2 as quickly as possible. If the area covered by the heat dissipation body 111 of the battery cell 2 is too large, or if the heat sink 112 contacts the edge area of ​​the battery cell 2, then under the premise of ensuring that the heat of the highest temperature in the middle of the battery cell 2 can be dissipated to the outside with high efficiency, the volume of the heat dissipation body 111 or the heat sink 112 needs to be designed to be larger, which will occupy too much space in the electronic product. In other words, the heat dissipation body 111 is not necessarily better if the area is larger. Preferably, the heat sink 11 of this solution includes four heat sinks 112, which are arranged around the outer periphery of the heat sink body 111. The distance A between the four ends of the heat sink body 111 and the corresponding edge of the battery cell 2 is 2mm-5mm. The thickness of the heat sink body 111 is preferably between 0.05mm-0.1mm. If the thickness of the heat sink body 111 is too thin, the efficiency of heat conduction from the battery cell 2 in the middle area will be low. If the thickness of the heat sink body 111 is too thick, the heat sink 11 will have too much space, thereby seriously reducing the energy density of the battery module.

[0032] Please refer to it again. Figure 2 In this design, the size of the heat sink 112 is gradually increased in the direction away from the heat dissipation body 111. This can further improve the efficiency of the heat sink 112 in dissipating the high temperature heat in the middle area of ​​the battery cell 2. In this embodiment, the heat sink 112 is preferably triangular in structure. The triangular structure of the heat sink 112 will not occupy too much space on the outside of the battery cell 2 and has a large heat conduction area.

[0033] Please see Figure 4 The heat dissipation device 1 in this embodiment may include multiple heat dissipation plates 11, and at least one heat-conducting element 12 is connected between each pair of adjacent heat dissipation plates 11. Preferably, the heat-conducting element 12 is connected between the heat dissipation fins 112 of two adjacent heat dissipation plates 11. In other embodiments, the heat-conducting element 12 may also be connected between the heat dissipation bodies 111 of two adjacent heat dissipation plates 11. In this embodiment, preferably, heat-conducting elements 12 are connected to the left and right ends of two adjacent heat dissipation plates 11. The heat-conducting element 12 may also be made of aluminum nitride ceramic, diamond, or graphene composite material. The connection of multiple heat dissipation plates 11 through heat-conducting elements 12 can further improve the heat dissipation performance of the battery cell 2 and help to further improve the temperature uniformity of multiple battery cells 2.

[0034] Please refer to the following: Figure 3 and Figure 4This embodiment also provides a battery module, which includes multiple battery cells 2 and the aforementioned heat dissipation device 1. At least one heat dissipation plate 11, sandwiched between the battery cells 2, is disposed in the central region of each cell 2. This design improves the heat dissipation efficiency of the battery cells 2 in the central region, thereby enhancing the temperature uniformity of the multiple battery cells 2 and extending the battery module's lifespan. This battery module can be used in various electronic products (such as laptops and mobile phones). The battery module may also include a housing, within which the multiple battery cells 2 and the heat dissipation device 1 are housed to form a battery pack.

[0035] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.

Claims

1. A heat dissipating device, characterized by, The device includes at least one heat sink, which is arranged in the middle region of a heat dissipation assembly formed by stacking multiple objects to be cooled. The heat sink includes a heat dissipation body and at least one heat sink connected to the outside of the heat dissipation body. The heat dissipation body is configured to be clamped by the multiple objects to be cooled so as to contact the surfaces of the multiple objects to be cooled. The heat sink is configured not to contact the surfaces of the objects to be cooled, and the size of the heat sink gradually increases in the direction away from the heat dissipation body.

2. The heat dissipation device as described in claim 1, characterized in that, The heat dissipation device includes a plurality of heat dissipation plates, and at least one heat-conducting element is connected between each pair of adjacent heat dissipation plates.

3. The heat dissipating device of claim 2, wherein The heat-conducting component connects the heat sinks of two adjacent heat sinks.

4. The heat dissipating device of claim 3, wherein The heat dissipation body has heat dissipation fins extending from at least two opposite ends, and two adjacent heat dissipation plates are connected to the heat-conducting element at their opposite ends.

5. The heat dissipating device of claim 1, wherein The heat sink includes four heat sinks, which together surround the outer periphery of the heat sink body.

6. The heat dissipation device as described in claim 1, characterized in that, The thickness of the heat dissipation body is between 0.05mm and 0.1mm.

7. The heat dissipating device of claim 1, wherein The heat sink is an aluminum nitride ceramic plate, a diamond plate, or a graphene composite plate.

8. The heat dissipating device of claim 1, wherein, The distance between the heat dissipation body and the edge of the object to be dissipated is 2mm-5mm.

9. The heat dissipating device of claim 1, wherein, The heat sink has a triangular structure.

10. A battery module, characterized in that, The device includes a plurality of battery cells and a heat dissipation device as described in any one of claims 1 to 9, wherein at least one heat dissipation plate is provided in the central region of the plurality of battery cells and is held by the battery cells.

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