Epoxy resin plate for battery case

Abstract

This utility model relates to the field of battery box technology, specifically disclosing an epoxy resin board for a battery box, comprising: a first plate and a second plate disposed opposite to each other, forming a clamping space for accommodating a battery pack; a connecting plate, one end of which is fixed to the second plate and the other end of which penetrates through the first plate; and a limiting seat sleeved on the connecting plate, connected to the first plate, for fixing the connecting plate to the first plate. This utility model achieves the clamping of the epoxy resin board for the battery pack by the sliding and locking of the limiting seat on the connecting plate, avoiding the use of adhesives, eliminating the problem of peeling of the bonding interface between the epoxy resin board and the battery pack shell under temperature cycling conditions due to the difference in thermal expansion coefficients, and improving structural stability; the surface of the connecting plate is covered with a heat-conducting medium, and the connecting plate is made of metal, which can quickly dissipate the heat of the battery pack.

Description

Technical Field

[0001] This utility model belongs to the field of battery box technology, and specifically relates to an epoxy resin board for battery boxes. Background Technology

[0002] Epoxy resin sheets, due to their excellent electrical insulation properties, high flame retardancy, and mechanical strength, have become a key material for the insulation and protection of lithium battery packs. In battery box design, these sheets are widely used in the outer enclosure structure of the battery pack, including but not limited to the left and right side facades and the top surface. By physically isolating the high-voltage modules from the metal enclosure, they effectively prevent electrical short circuits and improve system safety. Simultaneously, their rigid structure provides a certain degree of protection against compression and vibration for the battery cells.

[0003] A search revealed that CN216750191 U discloses a portable RV backup lithium battery pack, including a battery box, a battery box cover, and a battery disposed in the battery box. Side epoxy plates are installed on the left and right sides of the battery, and an upper epoxy plate is installed on the top of the battery. A battery management module is disposed between the upper epoxy plate and the battery box cover.

[0004] Currently, the installation of epoxy resin boards generally relies on adhesives to directly bond them to the outer wall of the battery pack. The difference in the coefficient of thermal expansion between the epoxy resin board and the battery pack shell material can cause the adhesive interface to peel off under temperature cycling conditions, and disassembly can easily lead to tearing of the outer insulation film of the battery cell. Utility Model Content

[0005] The purpose of this utility model is to provide an epoxy resin board for battery boxes, so as to solve the problems mentioned in the background art, which generally rely on adhesives to directly bond the epoxy resin board to the outer wall of the battery pack. The difference in the coefficient of thermal expansion between the epoxy resin board and the battery pack shell material causes the bonding interface to peel off under temperature cycling conditions, and the disassembly process is prone to tearing of the outer insulation film of the battery cell.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An epoxy resin board for a battery box, comprising:

[0008] The first plate and the second plate are positioned opposite each other, and a clamping space is formed between them to accommodate the battery pack;

[0009] The connecting plate is fixed at one end to the second plate and at the other end through the first plate.

[0010] A limiting seat is fitted onto the connecting plate and connected to the first plate body, used to fix the connecting plate onto the first plate body.

[0011] Preferably, a mounting groove is provided on one side of the first plate, and the limiting seat is installed in the mounting groove.

[0012] Preferably, the limiting seat is equipped with bolts, and the limiting seat is fixed in the mounting groove by the bolts.

[0013] Preferably, the limiting seat has an installation hole, and the connecting plate passes through the installation hole.

[0014] Preferably, both side walls of the mounting hole are provided with grooves, and movable plates are installed in both grooves. Limiting strips are connected to the sides of the two movable plates that are close to each other. Limiting grooves are provided on both sides of the connecting plate, and the limiting strips are set in the limiting grooves.

[0015] Preferably, an elastic element is provided between the movable plate and the inner wall of the groove.

[0016] Preferably, both the clamping surfaces of the first plate and the second plate are provided with heat dissipation grooves, forming heat dissipation channels when the battery pack is clamped.

[0017] Preferably, there is one connecting plate, which is located in the middle of the clamping space.

[0018] Preferably, there are two connecting plates, which are symmetrically distributed at the edge of the clamping space.

[0019] Preferably, the surface of the connecting plate is covered with a thermally conductive medium.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This invention achieves the clamping of the epoxy resin plate onto the battery pack by sliding and locking the limiting seat on the connecting plate, avoiding the use of adhesives and eliminating the problem of peeling at the bonding interface between the epoxy resin plate and the battery pack shell under temperature cycling conditions due to the difference in thermal expansion coefficients, thus improving structural stability. The surface of the connecting plate is covered with a thermally conductive medium, and the connecting plate is made of metal, which can quickly dissipate the heat from the battery pack, reduce the temperature fluctuation range, and indirectly reduce the impact of thermal expansion stress on the connection interface. The heat dissipation grooves on the clamping surfaces of the first and second plates form a heat dissipation channel, improving heat dissipation efficiency. Moreover, during disassembly, only the limiting seat needs to be removed to separate the epoxy resin plate from the battery pack, avoiding damage to the battery. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 This is a three-dimensional structural diagram of the present invention from another perspective.

[0024] Figure 3 This is a partial enlarged cross-sectional view of the first plate, connecting plate, and limiting seat of this utility model.

[0025] Figure 4 This is a partial enlarged cross-sectional view of the movable plate of this utility model.

[0026] Figure 5 This is a schematic diagram of the first plate structure of this utility model.

[0027] In the diagram: 100, first plate; 101, second plate; 102, heat dissipation groove; 103, mounting groove; 200, connecting plate; 201, limiting groove; 300, limiting seat; 301, mounting hole; 302, groove; 303, movable plate; 304, limiting strip; 305, elastic element; 306, bolt. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1: Refer to Figures 1-5 An epoxy resin board for a battery box, comprising:

[0030] The first plate 100 and the second plate 101 are arranged opposite to each other, forming a clamping space for accommodating the battery pack. Both the first plate 100 and the second plate 101 are epoxy resin plates.

[0031] The connecting plate 200 is fixed at one end to the second plate 101 and the other end passes through the first plate 100. The connecting plate 200 is a metal plate, which can be made of copper or aluminum.

[0032] The limiting seat 300 is sleeved on the connecting plate 200 and connected to the first plate 100. It is used to fix the connecting plate 200 on the first plate 100. The first plate 100 can move freely on the connecting plate 200 and can clamp battery packs of different sizes. The limiting seat 300 can also move flexibly on the connecting plate 200 to adapt to battery packs of different sizes. By moving the limiting seat 300 on the connecting plate 200, the first plate 100 and the second plate 101 can be clamped on both sides of the battery pack.

[0033] The first plate 100 has an installation groove 103 on one side. The limiting seat 300 is installed in the installation groove 103. The limiting seat 300 has the same shape as the limiting groove 201. The length and width of the limiting groove 201 are greater than the length and width of the limiting seat 300. After the limiting seat 300 is sleeved on the connecting plate 200 and moved, it can be fully embedded in the installation groove 103 and flush with the surface of the first plate 100. After the installation of the limiting seat 300 is completed, the part of the connecting plate 200 that protrudes from the surface of the first plate 100 can be cut off.

[0034] Bolts 306 are installed on the limiting seat 300. The limiting seat 300 is fixed in the mounting groove 103 by the bolts 306. The inner wall of the mounting groove 103 is provided with a threaded groove. The bolts 306 are installed in the threaded groove, so that the limiting seat 300 can be fixed in the mounting groove 103.

[0035] The limiting seat 300 has an installation hole 301, and the connecting plate 200 passes through the installation hole 301.

[0036] The mounting hole 301 has grooves 302 on both side walls, and movable plates 303 are installed in both grooves 302. Limiting strips 304 are connected to the side of the two movable plates 303 that are close to each other. Limiting grooves 201 are opened on both sides of the connecting plate 200. The limiting strips 304 are set in the limiting grooves 201. The opposite side of the limiting strips 304 and the limiting grooves 201 are both inclined surfaces. When the limiting seat 300 moves on the connecting plate 200, the two inclined surfaces come into contact and can push the limiting strips 304 to move, so that the movable plates 303 can move in the grooves 302. The limiting seat 300 can move unidirectionally on the connecting plate 200. The back side of the limiting strips 304 is the locking surface, and the other side of the limiting grooves 201 is the bearing surface. The locking surface can form surface contact with the bearing surface and achieve limiting.

[0037] An elastic element 305 is provided between the movable plate 303 and the inner wall of the groove 302. The elastic element 305 can be a sheet or a spring. The elastic element 305 provides the movable plate 303 with a resetting moving force.

[0038] The clamping surfaces of the first plate 100 and the second plate 101 are both provided with heat dissipation grooves 102, which form heat dissipation channels when the battery pack is clamped.

[0039] The number of connecting plates 200 is one, and it is located in the middle of the clamping space. The connecting plate 200 can pass through the battery pack. While connecting the first plate 100 and the second plate 101, the connecting plate 200 also provides heat dissipation for the battery pack.

[0040] The surface of the connecting plate 200 is covered with a thermally conductive medium, which can be thermally conductive silicone grease or indium foil.

[0041] Example 2: The difference between this example and Example 1 is that there are two connecting plates 200, which are symmetrically distributed at the edge of the clamping space. The two connecting plates 200 are respectively set on both sides of the battery pack to provide heat dissipation for the battery pack.

[0042] The working principle and usage process of this utility model are as follows: the battery pack is placed in the clamping space between the first plate 100 and the second plate 101, the first plate 100 is pushed to slide along the connecting plate 200 until the clamping surfaces of the first plate 100 and the second plate 101 are in contact with the outer wall of the battery pack, and the moving limiting seat 300 is moved to slide along the connecting plate 200 into the mounting groove 103.

[0043] When the limit seat 300 moves, the limit strip 304 in the mounting hole 301 contacts the limit groove 201 of the connecting plate 200. Due to the inclined design of the limit strip 304 and the limit groove 201, the movable plate 303 is pushed to compress the elastic element 305, so that the limit seat 300 can slide in one direction. When the limit seat 300 moves into the mounting groove 103, the elastic deformation of the elastic element 305 can drive the movable plate 303 to reset, so that the locking surface of the limit strip 304 fits with the bearing surface of the limit groove 201 to form a surface contact lock, preventing the limit seat 300 from sliding in the opposite direction.

[0044] The limiting seat 300 is embedded in the mounting groove 103 of the first plate 100 to ensure that its surface is flush with the first plate 100. The limiting seat 300 is fixed in the mounting groove 103 by bolts 306 to complete the position locking of the first plate 100. The clamping surfaces of the first plate 100 and the second plate 101 are provided with heat dissipation grooves 102. After the battery pack is attached, the heat dissipation grooves 102 and the surface of the battery pack form multiple heat dissipation channels to facilitate air circulation or coolant circulation.

[0045] The thermally conductive medium covering the surface of the connecting plate 200 contacts the battery pack, quickly conducting the heat generated by the battery pack to the connecting plate 200. If there is a single connecting plate 200, the heat is directly dissipated through the connecting plate 200; if there are two connecting plates 200, heat is dissipated simultaneously from both sides, improving heat dissipation efficiency.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An epoxy resin board for a battery box, characterized in that, include: The first plate (100) and the second plate (101) are arranged opposite to each other, and a clamping space for accommodating the battery pack is formed between them; The connecting plate (200) is fixed at one end to the second plate (101) and at the other end through the first plate (100); A limiting seat (300) is sleeved on the connecting plate (200). The limiting seat (300) is connected to the first plate (100) and is used to fix the connecting plate (200) on the first plate (100).

2. The epoxy sheet for a battery case according to claim 1, characterized by: The first plate (100) has an installation groove (103) on one side, and the limiting seat (300) is installed in the installation groove (103).

3. The epoxy sheet for a battery case according to claim 2, characterized by: Bolts (306) are installed on the limiting seat (300), and the limiting seat (300) is fixed in the mounting groove (103) by the bolts (306).

4. The epoxy sheet for a battery case according to claim 1, characterized by: The limiting seat (300) has an installation hole (301), and the connecting plate (200) passes through the installation hole (301).

5. The epoxy sheet for a battery case according to claim 4, characterized by: The mounting hole (301) has grooves (302) on both side walls, and movable plates (303) are installed in both grooves (302). Limiting strips (304) are connected to the side of the two movable plates (303) that are close to each other. Limiting grooves (201) are opened on both sides of the connecting plate (200), and the limiting strips (304) are set in the limiting grooves (201).

6. The epoxy resin board for a battery box according to claim 5, characterized in that: An elastic element (305) is provided between the movable plate (303) and the inner wall of the groove (302).

7. The epoxy resin board for a battery box according to claim 1, characterized in that: The clamping surfaces of the first plate (100) and the second plate (101) are provided with heat dissipation grooves (102), which form heat dissipation channels when clamping the battery pack.

8. The epoxy resin board for a battery box according to claim 1, characterized in that: The number of connecting plates (200) is one, and it is located in the middle of the clamping space.

9. The epoxy resin board for a battery box according to claim 1, characterized in that: There are two connecting plates (200), which are symmetrically distributed at the edge of the clamping space.

10. The epoxy resin board for a battery box according to claim 1, characterized in that: The surface of the connecting plate (200) is covered with a heat-conducting medium.

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