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CN-224217652-U - Battery pack and power utilization device

CN224217652UCN 224217652 UCN224217652 UCN 224217652UCN-224217652-U

Abstract

The application provides a battery pack and an electric device, and relates to the technical field of batteries. The battery pack includes a case having a receiving chamber, and an explosion-proof valve including a valve body, a clamping member, and a sealing member. The box includes the lateral wall, has offered the through-hole with hold the chamber intercommunication on the lateral wall, and the lateral wall has spacing face and the sealed face of relative setting, and the joint spare is connected in one side of valve body, and the joint spare wears to locate the through-hole setting, and the butt on spacing face, and the sealing member sets up along the circumference of valve body, and the butt is between sealed face and valve body. According to the battery pack provided by the application, when the battery pack is out of control, the clamping piece is broken under the impact of high-temperature and high-pressure gas generated by the battery pack, and the explosion-proof valve is separated from the box body after the clamping piece is lost to release the through hole for pressure relief until the pressure in the box body is leveled, so that the possibility of heat residue is reduced, a better pressure relief effect is achieved, and the safety of the battery pack is improved.

Inventors

  • ZHU ZHIQIANG
  • ZHAO JIYANG

Assignees

  • 欣旺达动力科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250508

Claims (10)

  1. 1. A battery pack, comprising: the box body (200) is provided with a containing cavity (210), the box body (200) comprises a side wall (201), a through hole (220) communicated with the containing cavity (210) is formed in the side wall (201), and the side wall (201) is provided with a limiting surface (230) and a sealing surface (240) which are oppositely arranged; Explosion-proof valve (300), including valve body (310), joint spare (320) and sealing member (330), joint spare (320) are connected one side of valve body (310), joint spare (320) wear to locate through-hole (220) set up, and the butt is in on spacing face (230), sealing member (330) are followed circumference (X) of valve body (310) set up, and the butt is in between sealing surface (240) and valve body (310).
  2. 2. The battery pack according to claim 1, wherein the clamping member (320) comprises a plurality of buckles (321), the plurality of buckles (321) are arranged at intervals along the circumferential direction (X) of the valve body (310), and each buckle (321) is arranged through the through hole (220) in a penetrating manner and abuts against the limiting surface (230).
  3. 3. The battery pack according to claim 2, wherein a notch (32111) is formed at an end of each of the clasps (321) adjacent to the valve body (310), and the notch (32111) communicates with the through hole (220).
  4. 4. A battery pack according to claim 3, wherein each buckle (321) has a first side (32112) and a second side (32113) disposed opposite to each other, the first side (32112) and the second side (32113) are respectively provided with the notch (32111), and each notch (32111) communicates with the through hole (220).
  5. 5. The battery pack according to claim 2, wherein each buckle (321) comprises a first clamping portion (3211) and a second clamping portion (3212), the first clamping portion (3211) is connected between the valve body (310) and the second clamping portion (3212), the first clamping portion (3211) and the second clamping portion (3212) form a step structure, the first clamping portion (3211) abuts against a wall of the through hole (220), and the second clamping portion (3212) abuts against the limiting surface (230).
  6. 6. The battery pack according to claim 2, wherein an end of each of the snaps (321) remote from the valve body (310) is provided with a guide slope (32121).
  7. 7. The battery pack according to any one of claims 1 to 6, wherein a first groove (311) is provided on a side of the valve body (310) facing the clamping member (320), the first groove (311) is provided along a circumferential direction (X) of the valve body (310), a portion of the sealing member (330) is provided in the first groove (311), and a portion of the sealing member (330) facing away from the first groove (311) abuts against the sealing surface (240).
  8. 8. The battery pack according to any one of claims 1 to 6, wherein the explosion-proof valve (300) further comprises a waterproof and breathable layer (340), the valve body (310) is provided with a ventilation hole (312), the ventilation hole (312) penetrates through the valve body (310) along the axial direction of the through hole (220) and is communicated with the through hole (220), and the waterproof and breathable layer (340) covers Feng Zaisuo the ventilation hole (312) away from one end of the case (200).
  9. 9. The battery pack according to claim 8, wherein a second groove (313) communicated with the ventilation hole (312) is formed in one side of the valve body (310) away from the clamping piece (320), the waterproof ventilation layer (340) is arranged in the second groove (313), and the thickness of the waterproof ventilation layer (340) is smaller than the depth of the second groove (313).
  10. 10. An electrical device comprising the battery pack of any one of claims 1 to 9.

Description

Battery pack and power utilization device Technical Field The application relates to the technical field of batteries, in particular to a battery pack and an electric device. Background The information disclosed in this background section is only for enhancement of understanding of the general background of the disclosure and is not to be taken as an admission or any form of suggestion that this information forms the prior art that is well known to a person skilled in the art. In the existing battery pack, the battery pack is arranged in the accommodating cavity of the box body, the explosion-proof valve is connected to the through hole of the box body through a spring, and when the battery pack is out of control, high-temperature and high-pressure gas released by the battery pack drives the explosion-proof valve to overcome the elastic force of the spring so as to open the through hole for pressure relief. However, when the pressure in the box body reduces to a certain value, the explosion-proof valve can reset under the drive of the spring to close the through hole, so that residual heat is remained in the box body, the pressure release effect is poor, and the safety of the battery pack is affected. Disclosure of utility model Therefore, the application aims to provide a battery pack and an electric device, and aims to solve the technical problem that the pressure release effect of the battery pack in the prior art is poor. In order to achieve the above purpose, the technical scheme adopted by the application is as follows: In a first aspect, embodiments of the present application provide a battery pack including: The box body is provided with a containing cavity and comprises a side wall, a through hole communicated with the containing cavity is formed in the side wall, and the side wall is provided with a limiting surface and a sealing surface which are oppositely arranged; The explosion-proof valve comprises a valve body, a clamping piece and a sealing piece, wherein the clamping piece is connected to one side of the valve body, penetrates through the through hole, is arranged on the limiting surface in a butt joint mode, and is arranged along the circumferential direction of the valve body and is in butt joint with the sealing surface and the valve body. In one embodiment of the first aspect, the clamping member includes a plurality of buckles, the plurality of buckles are arranged along a circumferential direction of the valve body at intervals, and each buckle is arranged through the through hole and abuts against the limiting surface. In one embodiment of the first aspect, a notch is formed at an end of each buckle, which is close to the valve body, and the notch is communicated with the through hole. In one embodiment of the first aspect, each of the buckles has a first side and a second side disposed opposite to each other, the first side and the second side are respectively provided with the notch, and each notch is communicated with the through hole. In one embodiment of the first aspect, each of the buckles includes a first engaging portion and a second engaging portion, the first engaging portion is connected between the valve body and the second engaging portion, the first engaging portion and the second engaging portion form a step structure, the first engaging portion abuts against a wall of the through hole, and the second engaging portion abuts against the limiting surface. In one embodiment of the first aspect, an end of each of the catches remote from the valve body is provided with a guiding ramp. In one embodiment of the first aspect, a first groove is formed in one side, facing the clamping piece, of the valve body, the first groove is formed in the circumferential direction of the valve body, a part of the sealing piece is arranged in the first groove, and a part, facing away from the first groove, of the sealing piece abuts against the sealing surface. In one embodiment of the first aspect, the explosion-proof valve further includes a waterproof and breathable layer, and the valve body is provided with a ventilation hole, the ventilation hole penetrates through the valve body along the axial direction of the through hole and is communicated with the through hole, and the waterproof and breathable layer covers one end of the ventilation hole away from the box body. In one embodiment of the first aspect, a second groove communicated with the air hole is formed in one side, away from the clamping piece, of the valve body, the waterproof air-permeable layer is arranged in the second groove, and the thickness of the waterproof air-permeable layer is smaller than the depth of the second groove. In a second aspect, embodiments of the present application provide an electrical device comprising a battery pack as described in any of the embodiments above. The beneficial effects of the application are as follows: In the battery pack provided by the application, the side wall of the box body