Anti-explosion valve and riveting structure of battery top cover sheet

Abstract

The application discloses an explosion-proof valve and a riveting and pressing structure of a battery top cover sheet, which comprises an explosion-proof valve assembly and a base plate, the base plate is provided with an exhaust hole, and the explosion-proof valve assembly is riveted to the exhaust hole; the explosion-proof valve assembly comprises, from top to bottom, an upper pressing block, an upper air-permeable film, an upper sealing ring, an explosion-proof film, a lower cushion block, a lower sealing ring and a lower air-permeable film; a wall portion of the exhaust hole is provided with an embedding groove, the upper pressing block is provided with a deformation groove, the deformation groove is provided with an upper insertion piece, a lower insertion piece and a top sheet, the upper insertion piece and the lower insertion piece are arranged at the upper end and the lower end of the deformation groove respectively, and the upper insertion piece and the lower insertion piece are located at the edge positions of the deformation groove; a gap is arranged between the upper insertion piece and the lower insertion piece, the top sheet is horizontally arranged in the deformation groove, and the end portion of the top sheet is close to the gap so as to limit the upper insertion piece and the lower insertion piece from extending into the deformation groove under stress. The explosion-proof valve and the riveting and pressing structure of the battery top cover sheet have the advantages of simple structure, compact cooperation, reasonable design and the like; therefore, the explosion-proof valve and the riveting and pressing structure of the battery top cover sheet are products with superior technical and economic performances.

Description

[Technical Field] This invention mainly relates to a riveted structure for an explosion-proof valve and a battery top cover. [Background Technology] Most valves currently on the market used for electric vehicle power batteries employ a method of creating vent holes on the battery surface and installing explosion-proof valves inside the vent holes. These explosion-proof valves require the exhaust gas pressure inside the power battery to reach a certain level before they can vent.

[0001] Since exhaust gas accumulates in the exhaust port and puts pressure on the explosion-proof valve, the existing method of connecting the explosion-proof valve to the base plate is generally welding. The welding quality directly affects the quality of the battery, and the welding quality is easily affected by the precision of the machine. In order to reduce the instability of welding, we propose a riveting structure to improve the tightness of the connection and replace the traditional welding structure. [Summary of the Invention] To address at least one of the aforementioned problems, this invention proposes a novel structural solution. The explosion-proof valve and battery top cover riveting structure adopts the following technical solution: An explosion-proof valve and battery top cover riveting structure includes an explosion-proof valve assembly and a base plate, wherein the base plate is provided with a vent hole, and the explosion-proof valve assembly is riveted to the vent hole; The explosion-proof valve assembly, from top to bottom, includes an upper pressure block, an upper vent membrane, an upper sealing ring, an explosion-proof membrane, a lower pad, a lower sealing ring, and a lower vent membrane. The wall of the exhaust port is provided with an embedding groove. The upper pressure block has a deformation groove, which is provided with an upper insert, a lower insert, and a top plate. The upper and lower inserts are respectively located at the upper and lower ends of the deformation groove, and both the upper and lower inserts are located at the edge of the deformation groove. There is a gap between the upper and lower inserts. The top plate is horizontally located in the deformation groove, and the end of the top plate is close to the gap to limit the upper and lower inserts from extending into the deformation groove under force.

[0002] The thickness of the top sheet is greater than the gap; The embedding groove is provided with a bending position to allow the deformed upper / lower insert to be bent and inserted.

[0003] Preferably, the bottom end of the substrate has a protrusion that protrudes relative to the bottom end face, and both the protrusion and the vent hole are located at the center of the substrate.

[0004] Preferably, the vent holes are arranged in a series of three supports from top to bottom: a first support, a second support, and a third support. The diameters of the first support, the second support, and the third support gradually decrease, and the second support and the third support are located on the protruding part.

[0005] Preferably, the upper pressure block is placed in the first support position, the upper sealing ring, the explosion-proof membrane and the lower pad are placed in the second support position, and the lower sealing ring and the lower breathable membrane are placed in the third support position.

[0006] The beneficial effects of this invention compared to the prior art are as follows: This invention provides a riveting structure for an explosion-proof valve and a battery top cover. When connecting the explosion-proof valve assembly to the substrate, each component of the explosion-proof valve assembly is placed at the corresponding position of the vent hole. The upper pressure block of the explosion-proof valve assembly is riveted, causing the end of the upper pressure block to fill and clamp into the interlocking groove. Simultaneously, the deformation of the upper pressure block forces the upper insert, lower insert, and top plate to extend into the interlocking groove, causing the upper and lower inserts to be fastened at the bending position, thus improving the connection tightness and solving the problem of weld detachment in traditional welding methods, significantly improving the connection quality. It has the advantages of simple structure, compact fit, and reasonable design; therefore, it is a product with superior performance in both technical and economic aspects. [Attached Image Description] Figure 1 This is an exploded view of the riveting structure of the explosion-proof valve and the battery top cover in a preferred embodiment of the present invention. Figure 2 This is a schematic diagram of the riveting structure between the explosion-proof valve and the battery top cover in a preferred embodiment of the present invention; Figure 3 This is an exploded cross-sectional view of the riveted structure of the explosion-proof valve and the battery top cover in a preferred embodiment of the present invention. Figure 4 for Figure 2 Enlarged diagram of position A in the middle; Figure 5 for Figure 3 Enlarged diagram of position B in the middle; Figure 6 for Figure 3 Enlarged diagram of position C in the middle.

Detailed Implementation Methods

[0007] In this invention, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0008] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and its beneficial effects clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the invention.

[0009] The preferred embodiments provided by the present invention are as follows: Figures 1-6 As shown, an explosion-proof valve and battery top cover riveting structure includes an explosion-proof valve assembly 1 and a base plate 2. The base plate 2 is provided with an exhaust hole 21, and the explosion-proof valve assembly 1 is riveted to the exhaust hole 21. The explosion-proof valve assembly 1 includes an upper pressure block 11, an upper vent membrane 12, an upper sealing ring 13, an explosion-proof membrane 14, a lower pad 15, a lower sealing ring 16, and a lower vent membrane 17. The upper pressure block 11, upper sealing ring 13, lower pad 15, and lower sealing ring 16 are all provided with vent holes. The wall of the vent hole 21 is provided with an embedding groove 22, which is located at the first support position 25. The upper pressure block 11 has a deformation groove 3, which is provided with an upper... Insert 31, lower insert 32 and top plate 33, upper insert 31 and lower insert 32 are respectively disposed at the upper end and lower end of deformation groove 3, and both upper insert 31 and lower insert 32 are located at the edge of deformation groove 3; a gap 34 is provided between upper insert 31 and lower insert 32, and top plate 33 is horizontally disposed in deformation groove 3, and the end of top plate 33 is close to gap 34 to limit the upper insert 31 and lower insert 32 from extending into deformation groove 3 under force.

[0010] The thickness of the top piece 33 is greater than the gap 34, so that the upper insert 31 and the lower insert 32 are forced to extend outward into the deformation groove 3 through the top piece 33; the embedding groove 22 is provided with a bending position 23 for the deformed upper insert 31 / lower insert 32 to be bent and inserted. The upper pressure block 11 is riveted. Since the upper pressure block 11 has a deformation groove 3, the upper pressure block 11 is squeezed and deformed, which forces the top piece 33 in the deformation groove 3 to deform and extend outward at the same time. The top piece 33 pushes the upper insert 31 and the lower insert 32 into the embedding groove 22. The upper insert 31 and the lower insert 32 extend along the embedding groove 22. When they reach the bending position 23, they are blocked by the end face of the embedding groove 22. The upper insert 31 and the lower insert 32 will bend and insert into the bending position 23 to form a fastening state, which greatly improves the tightness of the explosion-proof component connection and makes it less likely to loosen.

[0011] The bottom end of the substrate 2 has a protrusion 24 that protrudes from the bottom end face, and both the protrusion 24 and the vent hole 21 are located at the center of the substrate 2. The vent hole 21 is provided with a first support 25, a second support 26, and a third support 27 arranged sequentially, with the diameters of the first support 25, the second support 26, and the third support 27 gradually decreasing. The second support 26 and the third support 27 are located on the protrusion 24. The upper pressure block 11 is placed on the first support 25, the upper sealing ring 13, the explosion-proof film 14, and the lower pad 15 are placed on the second support 26, and the lower sealing ring 16 and the lower vent membrane 17 are placed on the third support 27. The upper vent membrane 12 is sandwiched between the upper pressure block 11 and the upper sealing ring 13, the explosion-proof film 14 is sandwiched between the lower pad 15 and the upper sealing ring 13, and the lower sealing ring 16 is sandwiched between the lower pad 15 and the lower vent membrane 17. This structure employs a double sealing ring structure. Through the tight cooperation of each component, the sealing ring is confined to the second support 26 and the third support 27. The diameters of the third support 27, the second support 26, and the first support 25 gradually increase, and the protrusion 24 protrudes towards the bottom surface of the substrate 2, so that the exhaust port 21 can accommodate more leakage, thereby reducing the impact on the explosion-proof valve assembly 1 and improving the explosion-proof performance.

[0012] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. Illustrative expressions of the above terms in this specification 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.

[0013] Based on the above description of the structure and principle, those skilled in the art should understand that the present invention is not limited to the specific embodiments described above. Improvements and substitutions made using techniques known in the art based on the present invention all fall within the protection scope of the present invention and should be defined by the claims.

Claims

1. A riveted structure for an explosion-proof valve and a battery top cover, characterized in that: It includes an explosion-proof valve assembly and a base plate, the base plate having an exhaust port, and the explosion-proof valve assembly being riveted to the exhaust port; The explosion-proof valve assembly, from top to bottom, includes an upper pressure block, an upper vent membrane, an upper sealing ring, an explosion-proof membrane, a lower pad, a lower sealing ring, and a lower vent membrane. The wall of the exhaust port is provided with an embedding groove. The upper pressure block has a deformation groove, which is provided with an upper insert, a lower insert, and a top plate. The upper and lower inserts are respectively located at the upper and lower ends of the deformation groove, and both the upper and lower inserts are located at the edge of the deformation groove. There is a gap between the upper and lower inserts. The top plate is horizontally located in the deformation groove, and the end of the top plate is close to the gap to limit the upper and lower inserts from extending into the deformation groove under force. The thickness of the top sheet is greater than the gap; The embedding groove is provided with a bending position to allow the deformed upper / lower insert to be bent and inserted.

2. The explosion-proof valve and battery top cover riveting structure according to claim 1, characterized in that: The bottom end of the substrate has a protrusion that protrudes from the bottom end face, and both the protrusion and the vent hole are located at the center of the substrate.

3. The explosion-proof valve and battery top cover riveting structure according to claim 2, characterized in that: The exhaust vents are arranged in a series of three supports from top to bottom: the first support, the second support, and the third support. The diameters of the first support, the second support, and the third support gradually decrease, with the second and third supports located on the protruding parts.

4. The explosion-proof valve and battery top cover riveting structure according to claim 3, characterized in that: The upper pressure block is placed in the first support position, the upper sealing ring, the explosion-proof membrane and the lower pad are placed in the second support position, and the lower sealing ring and the lower breathable membrane are placed in the third support position.

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