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CN-224232860-U - Battery cell

CN224232860UCN 224232860 UCN224232860 UCN 224232860UCN-224232860-U

Abstract

The present application relates to a battery. The electric core exhaust assembly comprises a support plate and a second exhaust valve arranged on the support plate, wherein the support plate covers one end face of the plurality of electric cores with explosion-proof valves, the second exhaust valve is provided with a plurality of valve covers which respectively correspond to the explosion-proof valves, and the second exhaust valve is provided with a valve cover which can be opened when the air pressure exceeds a second air pressure threshold value and an elastic piece which can be used for closing the valve cover after the air exhaust is completed. According to the technical scheme, the safety of the battery can be improved.

Inventors

  • CHENG DEYONG
  • TIAN YANFENG
  • JIN QUANLIANG
  • YU HONGJIANG
  • LIU YE

Assignees

  • 江苏正力新能电池技术股份有限公司

Dates

Publication Date
20260512
Application Date
20250526

Claims (10)

  1. 1. A battery, comprising: a case (10); a first exhaust valve (20) arranged on the box body (10) and configured to exhaust when the air pressure in the box body (10) exceeds a first air pressure threshold value; The multiple battery cores (30) are arranged in the box body (10), and the battery cores (30) are provided with explosion-proof valves (32) facing the same direction and outwards; The battery cell exhaust assembly (40) comprises a supporting plate (41) and a second exhaust valve (42) arranged on the supporting plate (41), wherein the supporting plate (41) covers one end face of a plurality of battery cells (30) with the explosion-proof valve (32), and the second exhaust valve (42) is provided with a plurality of exhaust valves which respectively correspond to the explosion-proof valve (32); The second exhaust valve (42) is provided with a valve cover (421) that can be opened when the air pressure exceeds a second air pressure threshold value, and an elastic member (423) that can close the valve cover (421) after the exhaust is completed.
  2. 2. The battery according to claim 1, characterized in that the valve cover (421) covers the venting area of the explosion-proof valve (32), the forward projected area of the valve cover (421) in the direction of the explosion-proof valve (32) being larger than the forward projected area of the explosion-proof valve (32) in the direction.
  3. 3. The battery according to claim 1, wherein the second exhaust valve (42) further comprises a valve body (422) protruding from the support plate, the valve body (422) comprises a pivot (424) arranged on one side of the valve body (422), the valve cover (421) comprises a connecting portion (4211), and the connecting portion (4211) and the elastic member (423) are sleeved on the pivot (424).
  4. 4. A battery according to claim 3, characterized in that the elastic member (423) comprises a first torsion arm (4231) connected to the valve body (422) and a second torsion arm (4232) connected to the valve cover (421) to effect the opening and closing of the valve cover (421).
  5. 5. The battery according to claim 4, wherein the valve body (422) is further provided with a blocking portion (4225), the blocking portion (4225) being configured to receive the first torsion arm (4231), the valve cover (421) being provided with an abutment groove (4212), the abutment groove (4212) being configured to receive the second torsion arm (4232).
  6. 6. The battery according to claim 1, wherein an exhaust channel (411) is arranged on the surface of the supporting plate (41) facing away from the battery cell (30), the exhaust channel (411) is formed by recessing a partial area of the supporting plate (41) towards the explosion-proof valve (32), and the exhaust channel (411) is communicated with the explosion-proof valve (32) through the second exhaust valve (42) arranged in the exhaust channel (411).
  7. 7. A battery according to claim 3, wherein the valve body (422) comprises a vent hole and a seal groove (4222) arranged around the vent hole, a sealing ring is arranged in the seal groove (4222), and the valve cover (421) is covered on one side of the vent hole away from the explosion-proof valve (32) and is in sealing connection with the sealing ring.
  8. 8. A battery according to claim 3, wherein a side of the valve body (422) facing away from the explosion-proof valve (32) is provided with a first receiving groove (4223) for receiving the valve cap (421), and a second receiving groove (4224) communicating with the first receiving groove (4223), the second receiving groove (4224) being provided with the pivot shaft (424).
  9. 9. The battery according to claim 6, characterized in that the exhaust passage (411) extends in a direction toward the first exhaust valve (20) and communicates with the first exhaust valve (20).
  10. 10. The battery according to any one of claims 1-9, wherein in the operational state of the battery, the explosion-proof valve (32) and the cell vent assembly (40) are both located at the bottom of the cell (30), and the first vent valve (20) is provided at a side wall of the case (10).

Description

Battery cell Technical Field The application relates to the field of power batteries, in particular to a battery. Background The power battery is a storage battery for providing power for high-energy consumption equipment such as electric automobiles, electric tools and the like, and is characterized by high energy density, high power output capability and long cycle life, and is regarded as the heart of a new energy automobile. A single power cell is commonly referred to as a battery pack or battery pack, which is made up of a number of cells. The battery core can generate a large amount of heat during operation, and the battery core needs to be regulated and controlled through a thermal management system. For safety reasons, thermal runaway resulting from a failure in the regulation of the thermal management system needs to be considered. When the gas and solid particles with high temperature and high pressure are generated after thermal runaway, if the gas and solid particles cannot be effectively discharged out of the battery pack in time, the temperature and the pressure in the battery pack are increased, severe reaction and even explosion are caused, and hidden danger is brought to the personal safety and property safety of a vehicle user. Disclosure of utility model Accordingly, the present application is directed to a battery that solves at least one of the problems of the related art. In order to achieve the above purpose, the technical scheme of the application is realized as follows: an embodiment of the present application provides a battery including: a case; The first exhaust valve is arranged on the box body and is configured to exhaust when the air pressure in the box body exceeds a first air pressure threshold value; the battery cores are arranged in the box body and are provided with explosion-proof valves facing the same direction and outwards; The battery cell exhaust assembly comprises a support plate and a second exhaust valve arranged on the support plate, wherein the support plate covers one end face of the explosion-proof valve of a plurality of battery cells; The second exhaust valve is provided with a valve cover which can be opened when the air pressure exceeds a second air pressure threshold value, and an elastic piece which can be closed after the exhaust is completed. In an alternative embodiment, the valve cover covers the venting area of the explosion-proof valve, and the orthographic projection area of the valve cover in the direction of the explosion-proof valve is larger than the orthographic projection area of the explosion-proof valve in the direction. In an alternative embodiment, the second exhaust valve further comprises a valve body protruding from the supporting plate, the valve body comprises a pivot arranged on one side of the valve body, the valve cover comprises a connecting portion, and the connecting portion and the elastic piece are sleeved on the pivot. In an alternative embodiment, the elastic member includes a first torsion arm connected to the valve body and a second torsion arm connected to the valve cover to effect opening and closing of the valve cover. In an alternative embodiment, the valve body is further provided with a blocking portion, the blocking portion is used for accommodating the first torsion arm, the valve cover is provided with an abutting groove, and the abutting groove is used for accommodating the second torsion arm. In an alternative embodiment, an exhaust channel is arranged on the surface of the supporting plate, which is opposite to the battery cell, wherein the exhaust channel is formed by recessing a part of the area of the supporting plate towards the direction of the explosion-proof valve, and the exhaust channel is communicated with the explosion-proof valve through the second exhaust valve arranged in the exhaust channel. In an alternative embodiment, the valve body comprises an exhaust hole and a sealing member groove surrounding the exhaust hole, a sealing ring is arranged in the sealing member groove, and the valve cover is arranged on one side of the exhaust hole away from the explosion-proof valve and is in sealing connection with the sealing ring. In an alternative embodiment, a first accommodating groove for accommodating the valve cover and a second accommodating groove communicated with the first accommodating groove are formed in one side, away from the explosion-proof valve, of the valve body, and the pivot is arranged in the second accommodating groove. In an alternative embodiment, the exhaust passage extends in a direction toward the first exhaust valve and communicates with the first exhaust valve. In an alternative embodiment, in the working state of the battery, the explosion-proof valve and the cell exhaust component are both located at the bottom of the cell, and the first exhaust valve is disposed on the side wall of the box body. The battery provided by the embodiment of the application comprises a box