CN-224217531-U - Secondary battery, battery pack, and electricity using device

CN224217531UCN 224217531 UCN224217531 UCN 224217531UCN-224217531-U

Abstract

The application discloses a secondary battery, a battery pack and an electricity utilization device, wherein the secondary battery comprises a shell, an electrode assembly, a first cover plate, a second cover plate and a pressure release piece, the shell is provided with a pressure release hole, a containing cavity and a first through groove, the containing cavity and the first through groove penetrate through along a first direction, the pressure release hole is communicated with the containing cavity, the electrode assembly is arranged in the containing cavity, the first cover plate covers one side of the containing cavity and is connected with the shell, the first cover plate is provided with a second through groove penetrating through along the first direction, the second through groove is communicated with the first through groove, the second cover plate covers one side of the containing cavity far away from the first cover plate and is connected with the shell, the second cover plate is provided with a third through groove penetrating through along the first direction, the third through groove is communicated with the first through groove, and the pressure release piece is connected with the shell and covers the pressure release hole. The application can form a through three-dimensional heat dissipation path on the outer surface of the secondary battery, increase the heat dissipation area and effectively improve the heat exchange and dissipation efficiency. In addition, the pressure release piece is arranged on the shell, so that the pressure release of exhaust gas is facilitated, and the safety of the secondary battery is improved.

Inventors

CHEN YUQI
LIU JIANLONG
DONG TAO

Assignees

欣旺达动力科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250409

Claims (10)

1. A secondary battery having a first direction and a second direction, comprising: the shell is provided with a pressure relief hole, a containing cavity and a first through groove, wherein the containing cavity and the first through groove penetrate along the first direction, and the pressure relief hole is communicated with the containing cavity; An electrode assembly disposed in the receiving chamber; the first cover plate is covered on one side of the accommodating cavity and is connected with the shell, and is provided with a second through groove penetrating along the first direction, and the second through groove is communicated with the first through groove; The second cover plate is covered on one side of the accommodating cavity far away from the first cover plate and is connected with the shell, and is provided with a third through groove penetrating along the first direction, and the third through groove is communicated with the first through groove; and the pressure release part is connected with the shell and covers the pressure release hole.
2. The secondary battery according to claim 1, wherein the secondary battery has a third direction intersecting the first direction and the second direction, the case has a first side surface in the second direction, the first through groove has a notch penetrating the first side surface, and the pressure release hole is provided in the first side surface and is located on one side of the notch in the third direction.
3. The secondary battery according to claim 2, wherein, The shell is provided with a plurality of pressure relief holes, the pressure relief holes are arranged on the first side face, and at least two pressure relief holes are arranged on two sides of the notch along the third direction; The secondary battery comprises a plurality of pressure release pieces, wherein each pressure release piece is connected with the shell and covers one pressure release hole.
4. The secondary battery according to claim 1, wherein the pressure release hole is provided at a side of the case away from the first through groove in the second direction.
5. The secondary battery according to claim 1, wherein the first through groove has a bottom wall, the pressure release hole penetrates the bottom wall and communicates with the first through groove and the accommodation chamber, respectively, and the pressure release member is connected with the bottom wall and covers the pressure release hole.
6. The secondary battery according to claim 1, wherein the secondary battery has a third direction intersecting the first direction and the second direction, the first through groove has two side walls disposed opposite to each other in the third direction, the case has a plurality of the pressure release holes, the secondary battery includes a plurality of the pressure release pieces, each of the side walls is provided with at least one of the pressure release holes, and one of the pressure release pieces is connected to the side wall and covers one of the pressure release holes.
7. The secondary battery according to claim 1, wherein the secondary battery comprises: The first terminal is embedded in the first cover plate and is in conductive connection with the electrode assembly; And the second terminal is embedded in the second cover plate and is in conductive connection with the electrode assembly.
8. The secondary battery according to claim 1, wherein the secondary battery has a third direction intersecting the first direction and the second direction, the first through slot has a notch distant from the accommodation chamber in the second direction, the secondary battery comprising: A first terminal provided on one side of the first through groove in the third direction; the first terminal is embedded in the shell and is in conductive connection with the electrode assembly; the second terminal is arranged on one side, far away from the first terminal, of the first through groove along the third direction; the second terminal is embedded in the shell and is in conductive connection with the electrode assembly.
9. A battery pack comprising a case and the secondary battery according to any one of claims 1 to 8, the secondary battery being provided in the case.
10. An electric device comprising the secondary battery according to any one of claims 1 to 8, or the battery pack according to claim 9.

Description

Secondary battery, battery pack, and electricity using device Technical Field The application belongs to the technical field of batteries, and particularly relates to a secondary battery, a battery pack and an electric device. Background The secondary battery is used as an energy unit of the power battery pack, and a plurality of secondary batteries are generally stacked in a box body of the battery pack, so that the battery pack can achieve expected output power in a serial-parallel mode. However, the current power battery pack is continuously pursued for fast charging efficiency, and along with the reduction of fast charging time and the increase of fast charging efficiency, the heating rate of the secondary battery is increased, and at the moment, the secondary battery cannot timely emit heat, so that the safety of the battery is reduced. Disclosure of utility model The embodiment of the utility model provides a secondary battery, aims to solve the problem of heat dissipation efficiency of the heat generation rate of the existing secondary battery, and also aims to provide a battery pack and an electric device. The secondary battery provided by the embodiment of the application has a first direction and a second direction, and comprises: the shell is provided with a pressure relief hole, a containing cavity and a first through groove, wherein the containing cavity and the first through groove penetrate along the first direction, and the pressure relief hole is communicated with the containing cavity; An electrode assembly disposed in the receiving chamber; the first cover plate is covered on one side of the accommodating cavity and is connected with the shell, and is provided with a second through groove penetrating along the first direction, and the second through groove is communicated with the first through groove; The second cover plate is covered on one side of the accommodating cavity far away from the first cover plate and is connected with the shell, and is provided with a third through groove penetrating along the first direction, and the third through groove is communicated with the first through groove; and the pressure release part is connected with the shell and covers the pressure release hole. In some embodiments, the secondary battery has a third direction intersecting the first direction and the second direction, the case has a first side in the second direction, the first through groove has a notch away from the accommodation chamber in the second direction, and the pressure release hole is provided at one side of the notch in the third direction. In some embodiments, the casing has a plurality of pressure relief holes, the pressure relief holes are all arranged on the first side surface, at least two pressure relief holes are arranged on two sides of the notch along the third direction, and the secondary battery comprises a plurality of pressure relief pieces, wherein each pressure relief piece is connected with the casing and covers one pressure relief hole. In some embodiments, the pressure relief hole is disposed on a side of the housing away from the first through groove along the second direction. In some embodiments, the first through groove has a bottom wall, the pressure release hole penetrates through the bottom wall and is respectively communicated with the first through groove and the accommodating cavity, and the pressure release piece is connected with the bottom wall and covers the pressure release hole. In some embodiments, the secondary battery has a third direction intersecting the first direction and the second direction, the first through groove has two side walls disposed opposite to each other along the third direction, the case has a plurality of the pressure release holes, the secondary battery includes a plurality of the pressure release pieces, each of the side walls is provided with at least one of the pressure release holes, and one of the pressure release pieces is connected to the side wall and covers one of the pressure release holes. In some embodiments, the secondary battery includes: The first terminal is embedded in the first cover plate and is in conductive connection with the electrode assembly; And the second terminal is embedded in the second cover plate and is in conductive connection with the electrode assembly. In some embodiments, the secondary battery has a third direction intersecting the first direction and the second direction, the first through slot has a notch distant from the receiving cavity along the second direction, the secondary battery includes: A first terminal provided on one side of the first through groove in the third direction; the first terminal is embedded in the shell and is in conductive connection with the electrode assembly; the second terminal is arranged on one side, far away from the first terminal, of the first through groove along the third direction; the second terminal is embedded in the shell and is in conductiv