CN-224204286-U - Explosion-proof valve of battery

CN224204286UCN 224204286 UCN224204286 UCN 224204286UCN-224204286-U

Abstract

The utility model discloses a battery explosion-proof valve, which comprises a top cover plate, an explosion-proof valve plate, an elastic buffer layer, a honeycomb support array and a plurality of regular hexagon structural units, wherein the top cover plate is arranged on the outer side of the explosion-proof valve plate in a surrounding mode, the notch is arranged on the explosion-proof valve plate in a track-shaped mode and located in the inner side direction of the top cover plate, the annular reinforcing rib is of a folding structure with a wavy cross section and is arranged on the outer side of the notch in a surrounding mode, the elastic buffer layer is arranged on the outer side of the annular reinforcing rib in a surrounding mode, and the honeycomb support array is arranged on the outer side of the elastic buffer layer in a surrounding mode and comprises the regular hexagon structural units. Therefore, the corrugated folding structure of the annular reinforcing ribs and the elastic buffer layer on the outer side can effectively disperse and absorb external extrusion force to prevent the structure of the notch of the anti-explosion valve plate from being damaged due to extrusion, the arranged honeycomb support array can improve compressive strength, absorb and slow down vibration energy from multiple layers, greatly reduce the influence of vibration on the notch of the anti-explosion valve, ensure the integrity of the notch and maintain accurate explosion point values.

Inventors

XU LIJIAN
SUN WEN
CHENG HUI
Tan maoye
TAN WEI

Assignees

合肥力翔电池科技有限责任公司

Dates

Publication Date: 20260505
Application Date: 20250516

Claims (7)

1. The utility model provides a battery explosion-proof valve, includes top cap piece and explosion-proof valve block, the top cap piece encloses to be located the outside of explosion-proof valve block, be provided with the nick on the explosion-proof valve block, the nick is located top cap piece inboard direction just is the setting of runway type, its characterized in that still includes: The annular reinforcing rib is of a folding structure with a wavy section and is arranged on the outer side of the notch in a surrounding manner; the elastic buffer layer is arranged on the outer side of the annular reinforcing rib in a surrounding mode; The honeycomb support array is circumferentially arranged on the outer side of the elastic buffer layer and comprises a plurality of regular hexagon structure units.
2. The battery explosion-proof valve according to claim 1, wherein a plurality of hemispherical shock absorbing protrusions are arranged at the edge of the top cover sheet, and the plurality of shock absorbing protrusions are uniformly distributed at intervals along the circumferential direction of the top cover sheet.
3. The explosion-proof valve for battery according to claim 1, wherein in the folded structure of the annular reinforcing rib, a miniature damper is provided between adjacent folded portions.
4. The battery explosion-proof valve according to claim 3, wherein the miniature damping member adopts a rubber damping block or a damping spring structure.
5. The battery explosion-proof valve according to claim 1, wherein the elastic buffer layer is made of a silica gel material.
6. The battery explosion-proof valve according to claim 5, wherein the elastic buffer layer is fixedly connected by bonding or integral molding.
7. The battery explosion-proof valve according to claim 1, wherein the regular hexagonal unit side length of the honeycomb support array is set to be 0.8-1.2mm, and the wall thickness is 60-70% of the thickness of the explosion-proof valve plate.

Description

Explosion-proof valve of battery Technical Field The utility model relates to the technical field of lithium battery top cover parts, in particular to a battery explosion-proof valve. Background The new energy battery explosion-proof valve is a safety valve used in a battery module or energy storage equipment. The explosion-proof valve is used for monitoring the pressure and the temperature in the battery, and when the pressure or the temperature exceeds a set value, the explosion-proof valve is broken from the notch and is decompressed, so that the pressure in the battery is reduced, and explosion accidents are avoided. The explosion point value of the explosion-proof valve plate is directly related to the safety of the battery. At present, a conventional explosion-proof sheet is usually notched at the center of an aluminum sheet for one circle, as shown in fig. 1, the actual thickness of the notched position is extremely small, the residual thickness at the lowest position is even less than 0.05mm, so that the structural strength is lower, after the explosion-proof valve is assembled and welded on a battery, vibration jolt can exist in the actual working environment of the battery, the environment is very unfavorable to the conventional explosion-proof valve structure, the notched residual is extremely easy to damage, the explosion point value of the explosion-proof sheet is influenced, and the safety of the battery is reduced. Although the reinforcing ribs are designed on the outer side of the notch of the explosion-proof valve with the existing novel structure, the damage of vibration to the weak part of the notch can be prevented to a certain extent, there is still room for improvement, and in order to further improve the extrusion and vibration preventing performance of the explosion-proof valve, a novel structure of the battery explosion-proof valve is needed. Disclosure of utility model In order to solve the technical problems in the background technology, the utility model provides a battery explosion-proof valve. The utility model provides a battery explosion-proof valve, which comprises a top cover sheet and an explosion-proof valve sheet, wherein the top cover sheet is arranged on the outer side of the explosion-proof valve sheet in a surrounding mode, a notch is arranged on the explosion-proof valve sheet, is positioned in the inner side direction of the top cover sheet and is arranged in a runway mode, and the battery explosion-proof valve further comprises: The annular reinforcing rib is of a folding structure with a wavy section and is arranged on the outer side of the notch in a surrounding manner; the elastic buffer layer is arranged on the outer side of the annular reinforcing rib in a surrounding mode; The honeycomb support array is circumferentially arranged on the outer side of the elastic buffer layer and comprises a plurality of regular hexagon structure units. Therefore, vibration energy is absorbed and slowed down from a plurality of layers, the influence of vibration on the notch of the explosion-proof valve is greatly reduced, the integrity of the notch is ensured, and an accurate explosion point value is maintained. Preferably, a plurality of hemispherical shock absorbing bulges are arranged at the edge of the top cover sheet, and the plurality of shock absorbing bulges are uniformly distributed at intervals along the circumferential direction of the top cover sheet. Therefore, the shock-absorbing bulge can absorb shock energy through self elastic deformation, and the influence of shock on the explosion-proof valve is reduced. Preferably, in the folding structure of the annular reinforcing rib, a miniature damping piece is arranged between adjacent folding parts. Therefore, when the annular reinforcing rib is elastically deformed, damping force is provided, the vibration frequency and amplitude of the annular reinforcing rib are slowed down, and the protection effect of the annular reinforcing rib on the notch is further improved. Preferably, the miniature damping piece adopts a rubber damping block or damping spring structure. Preferably, the elastic buffer layer is made of silica gel or other elastic materials. Therefore, the anti-explosion valve plate has the function of buffering and damping, and reduces the direct impact of external force on the anti-explosion valve plate and the annular reinforcing rib. Preferably, the elastic buffer layer is fixedly connected by bonding or integral molding. Thus, the firmness of connection is ensured. Preferably, the side length of the regular hexagon unit of the honeycomb supporting array is set to be 0.8-1.2mm, and the wall thickness is 60-70% of the thickness of the anti-explosion valve plate. Thus, the anti-compression device is cooperated with the annular reinforcing ribs and the elastic buffer layer for protection, and the compressive strength is improved. In summary, the utility model has the advantages that the external extrusion