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CN-224217566-U - Battery monomer and battery package

CN224217566UCN 224217566 UCN224217566 UCN 224217566UCN-224217566-U

Abstract

The application provides a battery monomer and a battery pack, and relates to the technical field of batteries. The battery unit comprises a shell, an electrode assembly, an explosion-proof valve and a bottom support plate, wherein a first groove is formed in the bottom wall of the shell, a first through hole penetrating through the bottom wall of the first groove is formed in the top of the first groove, the electrode assembly is arranged in the shell, the first groove is concavely formed in the direction close to the electrode assembly, the explosion-proof valve is located in the first groove and connected with the bottom wall to cover the first through hole, the bottom support plate is arranged in the shell and is abutted to the end part, close to the bottom wall, of the electrode assembly, a second groove is formed in the bottom support plate in a manner of being concavely formed in the direction close to the electrode assembly, the top of the first groove is located in the second groove, a second through hole penetrating through the top of the second groove is formed in the top of the second groove, and the second through hole is communicated with the first through hole. Based on the structural design, the shock resistance of the bottom wall of the shell and the explosion-proof valve is improved, and the safety of the battery monomer is improved.

Inventors

  • ZHENG HONGJIA
  • QIN JISHENG
  • YANG WEI
  • JIANG MINGXU
  • HUANG JUNFU

Assignees

  • 欣旺达动力科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250521

Claims (10)

  1. 1. A battery cell, comprising: The shell (110) is provided with a bottom wall (112), a first groove (115) is formed in the bottom wall (112), and a first through hole (114) penetrating through the groove top of the first groove (115) is formed; An electrode assembly (140) disposed in the case (110), the first groove (115) being recessed in a direction approaching the electrode assembly (140); An explosion-proof valve (150) positioned in the first groove (115) and connected with the groove top of the first groove (115) to cover the first through hole (114); the bottom plate (170) set up in casing (110), bottom plate (170) with electrode assembly (140) are close to the tip butt of diapire (112), be provided with second recess (172) on bottom plate (170), second recess (172) are towards being close to the direction of electrode assembly (140) is sunken, the groove top of first recess (115) is located in second recess (172), be provided with second through-hole (171) that run through on the groove top of second recess (172), second through-hole (171) with first through-hole (114) intercommunication.
  2. 2. The battery cell according to claim 1, further comprising an insulating layer (160) located in the case (110), wherein the insulating layer (160) is wrapped outside the electrode assembly (140), a groove top of the second groove (172) is connected with the insulating layer (160) and abuts against a groove top of the first groove (115), and the second through hole (171) is disposed opposite to the groove top of the first groove (115).
  3. 3. The battery cell according to claim 2, wherein a first support portion (177) is provided on a side of the bottom plate (170) facing the electrode assembly (140), the first support portion (177) protrudes in a direction approaching the electrode assembly (140) and abuts against the electrode assembly (140), an exhaust passage (173) is formed between the bottom plate (170) and the electrode assembly (140), and the exhaust passage (173) communicates with the second through hole (171).
  4. 4. The battery cell according to claim 3, wherein the battery cell has a first direction (X), a second support portion (175) and a third support portion (176) are provided on a side of the bottom plate (170) close to the electrode assembly (140), the second support portion (175) and the third support portion (176) are respectively abutted to the electrode assembly (140), and the first support portion (177) is located between the second support portion (175) and the third support portion (176) along the first direction (X).
  5. 5. The battery cell according to claim 4, further comprising a second direction (Y) perpendicular to the first direction (X), wherein the second support (175) and/or the third support (176) are first bar-shaped supports (181), and wherein the first bar-shaped supports (181) are arranged to extend in the second direction (Y).
  6. 6. The battery cell according to claim 4, further comprising a second direction (Y) perpendicular to the first direction (X), wherein the first support portion (177) is provided in plurality, and wherein the plurality of first support portions (177) are disposed opposite to each other along the second direction (Y).
  7. 7. The battery cell according to claim 6, wherein the bottom plate (170) is provided with a plurality of third through holes (174) therethrough, the third through holes (174) are in communication with the exhaust passage (173), and the first supporting portion (177) and the third through holes (174) are arranged at intervals along the first direction (X).
  8. 8. The battery cell of claim 4, wherein the bottom plate (170) is provided with a first positioning hole (178) and a second positioning hole (179) therethrough, the first support (177) is a second bar-shaped support (182), the second bar-shaped support (182) is disposed to extend along the first direction (X), and the second bar-shaped support (182) is disposed between the first positioning hole (178) and the second positioning hole (179) along the first direction (X).
  9. 9. The battery cell according to any one of claims 1 to 8, further comprising a protective layer (190), wherein the protective layer (190) is located on a side of the explosion-proof valve (150) facing away from the electrode assembly (140) and is connected to the bottom wall (112), wherein ventilation holes (191) penetrating through the protective layer (190) are formed in the protective layer (190), and wherein the protective layer (190) is located in the first groove (115).
  10. 10. A battery pack comprising the battery cell according to any one of claims 1 to 9.

Description

Battery monomer and battery package Technical Field The application relates to the technical field of batteries, in particular to a battery monomer and a battery pack. 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 order to reduce the risk of thermal runaway of the battery cell, an explosion-proof valve bottom design is generally adopted, namely, the explosion-proof valve is positioned on the bottom wall of the shell of the battery cell, so that high-temperature and high-pressure gas in the shell is evacuated to the bottom of an automobile when thermal runaway occurs, and harm to personnel in the automobile is avoided. However, since the explosion-proof valve is located on the bottom wall of the case, the bottom wall of the case and the explosion-proof valve are weak in impact resistance, thereby affecting the safety of the battery cell. Disclosure of utility model In view of the above, the present application provides a battery cell and a battery pack, which aims to solve the technical problem of how to improve the shock resistance of the bottom wall of the housing and the explosion-proof valve. 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 cell, comprising: The shell is provided with a bottom wall, a first groove is formed in the bottom wall, and a first through hole penetrating through the top of the first groove is formed in the groove top of the first groove; an electrode assembly disposed in the case, the first groove being recessed in a direction approaching the electrode assembly; an explosion-proof valve positioned in the first groove and connected with the bottom wall to cover the first through hole; The bottom plate, set up in the casing, the bottom plate with electrode assembly is close to the tip butt of diapire, be provided with the second recess on the bottom plate, the second recess is to being close to electrode assembly's direction is sunken, the roof of first recess is located in the second recess, be provided with the second through-hole that runs through on the roof of second recess, the second through-hole with first through-hole intercommunication. In one embodiment of the first aspect, the battery cell further includes an insulating layer located in the case, the insulating layer is wrapped outside the electrode assembly, a top of the second groove is connected with the insulating layer and abuts against a top of the first groove, and the second through hole and the top of the first groove are disposed opposite to each other. In one embodiment of the first aspect, a first supporting portion is disposed on a side of the bottom support plate facing the electrode assembly, the first supporting portion protrudes in a direction approaching the electrode assembly and abuts against the electrode assembly, an exhaust passage is formed between the bottom support plate and the electrode assembly, and the exhaust passage is communicated with the second through hole. In one embodiment of the first aspect, the battery cell has a first direction, a second support part and a third support part are disposed on a side of the bottom support plate, which is close to the electrode assembly, and the second support part and the third support part are respectively abutted to the electrode assembly, and the first support part is located between the second support part and the third support part along the first direction. In one embodiment of the first aspect, the battery cell further has a second direction perpendicular to the first direction, and the second support portion and/or the third support portion is a first strip-shaped support member, and the first strip-shaped support member is disposed to extend along the second direction. In one embodiment of the first aspect, the battery cell further has a second direction perpendicular to the first direction, and the first support portion is provided in plurality, and the plurality of first support portions are disposed opposite to each other along the second direction. In one embodiment of the first aspect, a plurality of third through holes penetrating through the bottom support plate are formed, the third through holes are communicated with the exhaust channel, and the first support portion and the third through holes are arranged at intervals along the first direction. In one embodiment of the first aspect, the bottom support plate is provided with a first positioning hole and a second positioning hole, the first support part is a second bar-shaped support piece, the second bar-shaped support piece extends along the first direction, and the second bar-shaped support