A combined battery cell bracket

Abstract

The present application discloses a combined battery cell support, comprising: a first heat dissipation component and a second heat dissipation component, the first heat dissipation component and the second heat dissipation component are used for respectively covering the flat heat dissipation surfaces on both sides of the battery cell; a flow channel separator (5), the flow channel separator (5) is arranged on the side of the first heat dissipation component or the second heat dissipation component facing away from the battery cell, and the flow channel separator (5) is used for spacing the flow channels on the surface of the first heat dissipation component or the second heat dissipation component facing away from the battery cell. Through the arrangement of the flow channel separator, heat dissipation channels are formed when the battery cells are grouped, facilitating the full contact and flow of the cooling media for air cooling and liquid cooling with the heat dissipation components, improving the heat exchange efficiency, and having better temperature uniformity. And the flow channel separator can form a physical isolation layer, which can effectively prevent heat spread and improve the safety of the battery. In this way, the technical effects of high heat dissipation and high safety are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and specifically relates to a combined battery cell bracket. Background Art

[0002] Lithium-ion batteries have the advantages of light weight, large energy storage, high power, no pollution, long life, small self-discharge coefficient, wide temperature adaptation range, etc., so they are gradually favored by people and have gradually replaced other traditional batteries in the fields of energy storage and power batteries. Among them, the soft-pack battery has a relatively high monomer energy density, but it has certain disadvantages in terms of safety and grouping efficiency. The current grouping method of soft-pack batteries will cause heat accumulation and uneven heat dissipation inside the battery module. At present, the grouping method of soft-pack batteries will cause heat accumulation and uneven heat dissipation inside the battery module, and because this battery cell component unit has many parts, the assembly process is relatively complex, and the mass production efficiency is low. Therefore, a combined battery cell bracket with high heat dissipation and high safety is needed to improve the comprehensive performance of soft-pack batteries. Summary of the Invention

[0003] (1) Object of the Invention

[0004] The object of the present application is to provide a combined battery cell bracket with high heat dissipation and high safety.

[0005] (2) Technical Solution

[0006] To solve the above problems, the following technical solutions are adopted:

[0007] A combined battery cell bracket, characterized in that it includes: a first heat dissipation component and a second heat dissipation component, the first heat dissipation component and the second heat dissipation component are used to respectively cover the flat heat dissipation surfaces on both sides of the battery cell; a flow channel separator, the flow channel separator is arranged on the side of the first heat dissipation component or the second heat dissipation component facing away from the battery cell, and the flow channel separator is used to space the flow channels on the surface of the first heat dissipation component or the second heat dissipation component facing away from the battery cell.

[0008] Optionally, the flow channel separator includes a sheet-shaped bottom and bending parts respectively arranged on both sides of the sheet-shaped bottom. The sheet-shaped bottom includes a plurality of long strip-shaped isolation sheets arranged at intervals, and both ends of the isolation sheet are respectively connected to the bending parts, and the bending parts are clamped on the first heat dissipation component or the second heat dissipation component. Through the arrangement of the bending parts, a plurality of isolation sheets are connected together without affecting the formation of the flow channels on the surface of the first heat dissipation component or the second heat dissipation component facing away from the battery cell, which is convenient for installation and does not affect its function.

[0009] Optionally, a protruding portion protruding away from the battery cell is provided on the bent portion. A buckle member is provided on the side of the protruding portion facing the battery cell. The buckle member is used to provide a clamping force for clamping the bent portion on the first heat dissipation component or the second heat dissipation component. The installation stability of the flow channel separator is increased through the design of the buckle. At the same time, the protruding portion can play a certain protective role. When subjected to an external force collision, the protruding portion serves as a buffer to prevent it from directly contacting the battery cell or the battery cell bracket.

[0010] Optionally, there are multiple protruding portions, which are respectively arranged between every two connection positions of the bent portion and the separator. In this way, the connection of the separator and the protruding portion do not interfere with each other, and each can play its function.

[0011] Optionally, elastic members are respectively provided on the side of the separator facing the battery cell. The elastic members are used to adapt to the expansion stress in the thickness direction during the charging and discharging of the battery cell. In this way, the expansion stress in the thickness direction during the charging and discharging of the battery cell is absorbed.

[0012] Optionally, the first heat dissipation component includes a hollow plastic bracket and a first heat dissipation aluminum sheet, and the first heat dissipation aluminum sheet is covered on the hollow part of the plastic bracket; the second heat dissipation component includes an ear pressing block and a second heat dissipation aluminum sheet, and the ear pressing blocks are respectively arranged on both sides of the second heat dissipation aluminum sheet corresponding to the positions of the battery cell ears; a limiting groove is provided on the plastic bracket, and a limiting protrusion is provided on the ear pressing block, and the limiting groove and the limiting protrusion are fitted during assembly. In this way, the first heat dissipation component and the second heat dissipation component will not deviate from the preset position during assembly, and the first heat dissipation aluminum sheet and the second heat dissipation aluminum sheet completely cover the flat heat dissipation surfaces on both sides of the battery cell.

[0013] Optionally, when the plastic bracket and the ear pressing block are assembled, the four sides of the first heat dissipation aluminum sheet and the second heat dissipation aluminum sheet are separated from the battery cell.

[0014] Optionally, the plastic bracket and the first heat dissipation aluminum sheet are heat-melted into one body, and the ear pressing block and the second heat dissipation aluminum sheet are heat-melted into one body. In this way, the number of components during assembly is reduced, the assembly difficulty is greatly reduced, which is beneficial to mass production.

[0015] Optionally, pressure relief holes are provided at the positions of the plastic bracket, the first heat dissipation aluminum sheet and the second heat dissipation aluminum sheet corresponding to the thickness side of the battery cell, and the pressure relief holes on the plastic bracket, the pressure relief holes on the first heat dissipation aluminum sheet and the pressure relief holes on the second heat dissipation aluminum sheet coincide. A directional pressure relief channel is provided for the battery cell when it gets out of control to reduce the influence range of the out-of-control situation.

[0016] Optionally, positioning posts and positioning grooves are respectively provided on the flat sides at the four corners of the plastic bracket. The positioning posts and the positioning grooves are used to position the positions between every two battery cells when the battery cells are grouped. It is convenient to install and position between every two battery cells when the battery cells are grouped, and it can also restrict the displacement of the bracket. The design of the positioning posts can prevent the battery cells from being over-pressed.

[0017] Optionally, an insulating coating is provided on the side of the first heat dissipation aluminum sheet and the second heat dissipation aluminum sheet facing the battery cell. While not affecting the heat conduction performance, a better insulation effect can also be achieved.

[0018] (III) Advantageous Effects

[0019] The above technical solution of the present invention has the following beneficial technical effects:

[0020] Through the setting of the flow channel separator, heat dissipation flow channels are formed when the battery cells are grouped, facilitating the full contact and flow of the cooling media for air cooling and liquid cooling with the heat dissipation components, improving the heat exchange efficiency, and having good temperature uniformity. And the flow channel separator can form a physical isolation layer, which can effectively prevent heat spread and improve the safety of the battery. In this way, the technical effects of high heat dissipation and high safety are achieved. Description of the Drawings

[0021] Figure 1 is the schematic diagram of the explosion structure of this application;

[0022] Figure 2 is the schematic diagram of the assembled structure of this application;

[0023] Figure 3 is the schematic diagram of the structure of this application when the battery cells are grouped;

[0024] Figure 4 is the schematic diagram of the structure of the first heat dissipation component of this application;

[0025] Figure 5 is the schematic diagram of the structure of the second heat dissipation component of this application;

[0026] Figure 6 is Figure 3 the enlarged schematic diagram of part A of

[0027] Wherein: 1 - the first heat dissipation aluminum sheet, 2 - the plastic bracket, 3 - the second heat dissipation aluminum sheet, 4 - the tab pressing block, 5 - the flow channel separator, 6 - the elastic member, 7 - the isolation sheet, 8 - the bending part, 9 - the protruding part, 10 - the buckle member, 11 - the pressure relief hole, 12 - the positioning post, 13 - the positioning groove. Detailed Embodiments

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0029] Such as Figures 1-3As shown in the figure, a combined battery cell bracket is characterized by comprising: a first heat dissipation component and a second heat dissipation component, wherein the first heat dissipation component and the second heat dissipation component are used for respectively covering the flat heat dissipation surfaces on both sides of the battery cell; a flow channel separator 5, which is arranged on the side of the first heat dissipation component or the second heat dissipation component facing away from the battery cell, and the flow channel separator 5 is used for spacing the flow channels on the surface of the first heat dissipation component or the second heat dissipation component facing away from the battery cell. Through the arrangement of the flow channel separator 5, heat dissipation channels are formed when the battery cells are grouped, facilitating the full contact and flow of the cooling media of air cooling and liquid cooling with the heat dissipation components, improving the heat exchange efficiency, and having better temperature uniformity. And the flow channel separator 5 can form a physical isolation layer, which can effectively prevent heat spread and improve the safety of the battery. In this way, the technical effects of high heat dissipation and high safety are achieved.

[0030] As Figure 6As shown, the flow channel separator 5 includes a sheet-like bottom and bending portions 8 respectively arranged on both sides of the sheet-like bottom. The sheet-like bottom includes a plurality of long strip-shaped separator sheets 7 arranged at intervals. Both ends of the separator sheet 7 are respectively connected to the bending portions 8, and the bending portions 8 are clamped on the first heat dissipation component or the second heat dissipation component. To achieve a better heat dissipation effect, multiple intervals are required when separating the flow channels, which makes it necessary to use multiple separator sheets 7. If the separator sheets 7 are not connected, it will cause great trouble during production and assembly. If they are connected, it is necessary to consider whether it will affect the smoothness of the flow channels. For this reason, both ends of the separator sheet 7 are connected, and the connected parts at both ends are bent to form the bending portions 8, thereby dividing the flow channel separator 5 into a sheet-like bottom and bending portions 8. By arranging the bending portions 8, the multiple separator sheets 7 are connected together without affecting the formation of the flow channels on the surface of the first heat dissipation component or the second heat dissipation component facing away from the battery cell, which is convenient for installation and does not affect its function. A protruding portion 9 protruding away from the battery cell is arranged on the bending portion 8, and a buckle member 10 is arranged on the side of the protruding portion 9 facing the battery cell. The buckle member 10 is used to provide a clamping force for clamping the bending portion 8 on the first heat dissipation component or the second heat dissipation component. Through the design of the buckle, the installation stability of the flow channel separator 5 is increased. At the same time, the protruding portion 9 can play a certain protective role. When subjected to an external force collision, the protruding portion 9 serves as a buffer to prevent it from directly contacting the battery cell or the battery cell bracket. The protruding portions 9 are multiple and are respectively arranged between every two connection positions of the bending portion 8 and the separator sheet 7. This enables the connection of the separator sheets 7 and the protruding portions 9 to not interfere with each other and each play its function. Since the separator sheets 7 are used to separate the flow channels, the number of separator sheets 7 determines the number of flow channels, the width of the separator sheets 7 determines the stability of the flow channels, the thickness of the separator sheets 7 determines the height of the flow channels, and the interval distance between the separator sheets 7 determines the width of the flow channels. During design, selection is made according to the heat dissipation requirements of different battery cells. The number of separator sheets 7 is 2-9, the thickness of the separator sheets 7 is 1-3 mm, the width of the separator sheets 7 is 15-40 mm, and the interval distance between the separator sheets 7 is 15-40 mm. The elastic member 6 is used to adapt to the expansion stress in the thickness direction during the charging and discharging of the battery cell. In this way, the expansion stress in the thickness direction during the charging and discharging of the battery cell is absorbed, so that the expansion stress generated in the thickness direction during the charging and discharging of the battery cell is well solved without affecting the normal use of the battery cell. The elastic member 6 can be made of materials such as high-elastic foam. Different materials of elastic members are selected according to different cooling media and the foam rebound performance, such as: PU foam, EPDM, EVA, PE, etc. Since the elastic member 6 is arranged on the separator sheet 7, while the elastic member 6 absorbs the expansion change generated during the charging and discharging of the battery cell, the height of the flow channel changes, and the flow rate of the flow channel changes accordingly, so that the total amount of heat exchange is increased while absorbing the expansion stress, achieving the technical effects of high heat dissipation and high safety more excellently. Different thicknesses of the elastic member 6 can be selected according to the different expansion forces during the charging and discharging of different battery cells, and the thickness of the elastic member 6 can be selected as 1-3 mm.

[0031] As shown Figures 4-5 in the figure, the first heat dissipation component includes a hollow plastic bracket 2 and a first heat dissipation aluminum sheet 1, and the first heat dissipation aluminum sheet 1 is covered on the hollow part of the plastic bracket 2. The second heat dissipation component includes an ear pressing block 4 and a second heat dissipation aluminum sheet 3, and the ear pressing blocks 4 are respectively arranged on both sides of the second heat dissipation aluminum sheet 3 corresponding to the positions of the cell tabs. To inhibit the thermal diffusion of the cell during out-of-control, the first heat dissipation aluminum sheet 1 and the second heat dissipation aluminum sheet 3 can be bent to cover the thickness side of the cell, so as to inhibit the thermal diffusion of the cell during out-of-control. A limiting groove is provided on the plastic bracket 2, and a limiting protrusion is provided on the ear pressing block 4, and the limiting groove and the limiting protrusion are fitted during assembly. In this way, the first heat dissipation component and the second heat dissipation component will not deviate from the preset position during assembly, so that the first heat dissipation aluminum sheet 1 and the second heat dissipation aluminum sheet 3 completely cover the flat heat dissipation surfaces on both sides of the cell. The plastic bracket 2 and the ear pressing block 4 separate the four sides of the first heat dissipation aluminum sheet 1 and the second heat dissipation aluminum sheet 3 from the cell during assembly. The plastic bracket 2 and the first heat dissipation aluminum sheet 1 are melted into one body by hot melting, and the ear pressing block 4 and the second heat dissipation aluminum sheet 3 are melted into one body by hot melting. In this way, the number of components during assembly is reduced, the assembly difficulty is greatly reduced, and it is beneficial to mass production. Pressure relief holes 11 are provided at the positions of the plastic bracket 2, the first heat dissipation aluminum sheet 1 and the second heat dissipation aluminum sheet 3 corresponding to the thickness side of the cell, and the pressure relief holes 11 on the plastic bracket 2, the pressure relief holes 11 on the first heat dissipation aluminum sheet 1 and the pressure relief holes 11 on the second heat dissipation aluminum sheet 3 coincide. The pressure relief holes 11 can be designed into different shapes such as round holes, square holes or polygonal holes. To provide a directional pressure relief channel for the cell during out-of-control, so as to reduce the influence range of out-of-control. Positioning posts 12 and positioning grooves 13 are respectively provided on the flat sides at the four corners of the plastic bracket 2, and the positioning posts 12 and the positioning grooves 13 are used to position the positions between two cells when the cells are grouped. It is convenient to install and position between two cells when the cells are grouped, and it can also restrict the displacement of the bracket, and the design of the positioning post 12 can prevent the cell from being over-pressed. Insulating coatings are provided on the sides of the first heat dissipation aluminum sheet 1 and the second heat dissipation aluminum sheet 3 facing the cell, which can achieve better insulation effect while not affecting the thermal conductivity.

Claims

1. A combined battery cell support, characterized in that, it includes: A first heat dissipation component and a second heat dissipation component, the first heat dissipation component and the second heat dissipation component are used to respectively cover the flat heat dissipation surfaces on both sides of the battery cell; A flow channel separator (5), the flow channel separator (5) is arranged on the side of the first heat dissipation component or the second heat dissipation component facing away from the battery cell, and the flow channel separator (5) is used to space the flow channels on the surface of the first heat dissipation component or the second heat dissipation component facing away from the battery cell; The flow channel separator (5) includes a sheet-shaped bottom and bending parts (8) respectively arranged on both sides of the sheet-shaped bottom. The sheet-shaped bottom includes a plurality of long strip-shaped separator sheets (7) arranged at intervals. Both ends of the separator sheet (7) are respectively connected to the bending parts (8), and the bending parts (8) are clamped on the first heat dissipation component or the second heat dissipation component; A convex part (9) protruding away from the battery cell is arranged on the bending part (8), and a buckle part (10) is arranged on the side of the convex part (9) facing the battery cell. The buckle part (10) is used to provide a clamping force for the bending part (8) to be clamped on the first heat dissipation component or the second heat dissipation component.

2. The combined battery cell support according to claim 1, characterized in that, There are a plurality of the convex parts (9), and they are respectively arranged between every two of the connection positions of the bending part (8) and the separator sheet (7).

3. The combined battery cell support according to claim 1, characterized in that, Elastic parts (6) are respectively arranged on the side of the separator sheet (7) facing the battery cell, and the elastic parts (6) are used to adapt to the expansion stress in the thickness direction during the charging and discharging of the battery cell.

4. The combined battery cell support according to claim 1, characterized in that, The first heat dissipation component includes a hollow plastic bracket (2) and a first heat dissipation aluminum sheet (1), and the first heat dissipation aluminum sheet (1) is covered on the hollow part of the plastic bracket (2); the second heat dissipation component includes an ear pressing block (4) and a second heat dissipation aluminum sheet (3), and the ear pressing blocks (4) are respectively arranged on both sides of the second heat dissipation aluminum sheet (3) corresponding to the positions of the battery cell ears; a limiting groove is arranged on the plastic bracket (2), and a limiting protrusion is arranged on the ear pressing block (4), and the limiting groove and the limiting protrusion are fitted during assembly.

5. The combined battery cell support according to claim 4, characterized in that, When the plastic bracket (2) and the ear pressing block (4) are assembled, the four sides of the first heat dissipation aluminum sheet (1) and the second heat dissipation aluminum sheet (3) are separated from the battery cell.

6. The combined battery cell support according to claim 4, characterized in that, The plastic bracket (2) and the first heat dissipation aluminum sheet (1) are melted and integrated, and the ear pressing block (4) and the second heat dissipation aluminum sheet (3) are melted and integrated.

7. The combined battery cell support according to claim 4, characterized in that, The plastic bracket (2), the first heat dissipation aluminum sheet (1) and the second heat dissipation aluminum sheet (3) are provided with pressure relief holes (11) at positions corresponding to the thickness side of the battery cells, and the pressure relief holes (11) on the plastic bracket (2), the pressure relief holes (11) on the first heat dissipation aluminum sheet (1) and the pressure relief holes (11) on the second heat dissipation aluminum sheet (3) coincide.

8. The combined battery cell bracket according to claim 4, characterized in that positioning posts (12) and positioning grooves (13) are respectively arranged on two flat sides at the four corners of the plastic bracket (2), and the positioning posts (12) and the positioning grooves (13) are used to position the positions between two battery cells when the battery cells are grouped.

9. The combined battery cell bracket according to claim 4, characterized in that an insulating coating is provided on one side of the first heat dissipation aluminum sheet (1) and the second heat dissipation aluminum sheet (3) facing the battery cells.

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