CN-224232852-U - Battery monomer, battery device and electric equipment

Abstract

The application discloses a battery monomer, a battery device and electric equipment, relates to the technical field of batteries, and is used for enabling a pressure release piece in the battery monomer to have sufficient installation space. The battery unit comprises an electrode assembly, a shell and a pressure release piece, wherein an accommodating cavity is formed in the shell, the electrode assembly is located in the accommodating cavity, the shell comprises a first wall, the first wall forms one cavity wall of the accommodating cavity, the first wall comprises a pressure release part and a body part which are connected, the pressure release part protrudes towards the accommodating cavity relative to the body part along a first direction, and the pressure release part is provided with a pressure release hole which penetrates through the pressure release part. The pressure release piece is arranged in the pressure release hole so as to seal the pressure release hole. Wherein the first direction is the thickness direction of the first wall. The battery cell is used for storing electric energy.

Inventors

• YU JIE
• YANG KAIHUAN
• MIN YANPING
• ZHANG XIAOPING
• XING CHENGYOU

Assignees

• 宁德时代新能源科技股份有限公司

Dates

Publication Date

20260512

Application Date

20250410

Claims (17)

1. 1. A battery cell, comprising: An electrode assembly; The electrode assembly comprises a housing, a pressure relief part, a body part, a first electrode assembly, a second electrode assembly, a first electrode assembly and a second electrode assembly, wherein the housing is internally provided with a containing cavity, the electrode assembly is positioned in the containing cavity, the housing comprises a first wall which forms one cavity wall of the containing cavity, the first wall comprises the pressure relief part and the body part which are connected, the pressure relief part protrudes towards the containing cavity relative to the body part along a first direction, and the pressure relief part is provided with a pressure relief hole penetrating through the pressure relief part; the pressure release part is arranged in the pressure release hole so as to block the pressure release hole; Wherein the first direction is a thickness direction of the first wall.
2. 2. The battery cell of claim 1, wherein in the first direction, there is an isolation gap between the electrode assembly and the body portion.
3. 3. The battery cell of claim 2, wherein the battery cell comprises a plurality of cells, The inner surface of the pressure relief part is provided with at least one airflow groove, and the airflow groove penetrates through the pressure relief part along a second direction so as to communicate the pressure relief hole with the isolation gap; wherein the first direction intersects the second direction.
4. 4. The battery cell as recited in claim 3, wherein the pressure relief portion is formed in a middle portion of the first wall, and the air flow grooves are formed in opposite sides of the pressure relief hole.
5. 5. A cell according to claim 3, wherein the dimension of the airflow channel in the first direction is in the range of 0.5mm to 1.8mm.
6. 6. The battery cell of any one of claims 1-5, wherein a distance between an outer surface of the pressure relief portion and the electrode assembly is less than a distance between an outer surface of the body portion and the electrode assembly in the first direction.
7. 7. The battery cell of any one of claims 1-5, wherein the pressure relief portion is formed in a middle portion of the first wall.
8. 8. The battery cell according to any one of claims 1-5, wherein, The pressure relief piece comprises a connecting part and a guide part, wherein the connecting part is arranged along the inner periphery of the pressure relief hole, surrounds the guide part and is connected with the pressure relief part, and the guide part is of a flat plate structure or protrudes towards the outer part of the accommodating cavity.
9. 9. The battery cell according to claim 8, wherein the guide portion includes a protruding section and a supporting section connected to each other with a middle portion of the guide portion protruding toward an outside of the receiving chamber, the supporting section being disposed along an inner circumference of the connection portion and surrounding the protruding section, the supporting section protruding toward the receiving chamber with respect to the connection portion in the first direction, and the protruding section protruding entirely toward the outside of the receiving chamber.
10. 10. The battery cell of claim 9, wherein the battery cell comprises a plurality of cells, In the first direction, a distance between the outer surface of the support section and the electrode assembly is smaller than a distance between the outer surface of the connection portion and the electrode assembly.
11. 11. The battery cell of claim 9, wherein a distance between an inner surface of the support section and an inner surface of the connection portion in the first direction is in a range of 0.5mm to 1.5mm.
12. 12. The battery cell of claim 9, wherein the pressure relief member further comprises an arcuate transfer section disposed circumferentially between the connecting portion and the support section, the arcuate transfer section being connected to the connecting portion and the support section, respectively; The arc-shaped transfer section extends from the connection portion in a direction approaching the support section and approaching the electrode assembly.
13. 13. The battery cell of any one of claims 1-5, wherein an annular countersink is formed in the pressure relief hole along an inner periphery of the pressure relief hole, the annular countersink including an annular bearing surface facing away from the receiving cavity, the pressure relief member being carried by the annular bearing surface and being matingly connected to the annular countersink.
14. 14. The battery cell of any one of claims 1-5, wherein the housing comprises a shell and an end cap, the first wall is located on the shell, the shell further has an opening in communication with the receiving cavity, the opening is opposite the first wall, the end cap is sealingly located in the opening and is connected to the shell, and the electrode terminal is connected to the end cap.
15. 15. The battery cell of any one of claims 1-5, further comprising a bottom plate disposed in the receiving cavity and between the electrode assembly and the first wall, the electrode assembly being carried by the pressure relief portion through the bottom plate, the bottom plate having an air flow channel with one end in communication with the receiving cavity and the other end opening into the pressure relief aperture.
16. 16. A battery device, characterized by comprising: The box body is internally provided with a cavity; The battery cell of any one of claims 1-15, disposed within the cavity.
17. 17. A powered device comprising a battery unit according to any one of claims 1-15 or a battery arrangement according to claim 16 for providing electrical energy.

Description

Battery monomer, battery device and electric equipment Technical Field The application relates to the technical field of batteries, in particular to a battery monomer, a battery device and electric equipment. Background New energy batteries are increasingly used in life and industry, for example, new energy automobiles having a battery mounted therein have been widely used, and in addition, batteries are increasingly used in the field of energy storage and the like. In the related art, in the battery monomer, the pressure release piece can be installed on the shell diapire to realize the single end of battery spouts, but in the thickness direction of diapire, the diapire is the installation space that the pressure release piece provided limited, just so is difficult to satisfy the demand of the installation setting of all kinds of pressure release pieces. Disclosure of utility model In order to solve the technical problems, the application provides a battery unit, a battery device and electric equipment, which are used for providing sufficient installation space for pressure release pieces in the battery unit. The application is realized by the following technical scheme. The first aspect of the application provides a battery cell, the battery cell comprises an electrode assembly, a shell and a pressure release piece, a containing cavity is formed in the shell, the electrode assembly is located in the containing cavity, the shell comprises a first wall, the first wall forms one cavity wall of the containing cavity, the first wall comprises a pressure release part and a body part which are connected, the pressure release part protrudes towards the containing cavity relative to the body part along a first direction, and the pressure release part is provided with a pressure release hole penetrating through. The pressure release piece is arranged in the pressure release hole so as to seal the pressure release hole. Wherein the first direction is the thickness direction of the first wall. In the technical scheme of the embodiment of the application, the shell provides a containing space and physical protection for the electrode assembly, and the electrode assembly realizes storage and release of electric energy. In the first direction, because the pressure release portion is protruding to holding the chamber for body portion, consequently the distance between the surface of pressure release portion internal surface distance body portion can increase, so on seting up the pressure release hole to the pressure release portion, just increased the pressure release hole and be close to the distance between the one end distance body portion surface that holds the chamber, so when setting up the pressure release piece in the pressure release hole, the pressure release hole is close to the one end distance body portion surface that holds the chamber and is all can regard as the accommodation space of pressure release piece, in order to provide sufficient space for the pressure release piece, avoid the pressure release piece to be touched by mistake, improve battery monomer's reliability. In some embodiments of the application, there is an isolation gap between the electrode assembly and the body portion in the first direction. In this way, the electrode assembly can be prevented from contacting the body part, so that the body part is prevented from contacting the corners of other wall plates of the shell connected with the body part, and the probability of lithium precipitation of the electrode assembly is reduced. In some embodiments of the present application, the inner surface of the pressure relief portion has at least one air flow groove, and the air flow groove penetrates the pressure relief portion along the second direction to communicate the pressure relief hole with the isolation gap, wherein the first direction intersects the second direction. So set up, the gas in the shell not only can directly get into the pressure release hole, but also can get into the isolation clearance, and then in getting into the pressure release hole through the air current groove, so can improve the exhaust space that holds the intracavity to realize the pressure release, can carry out more abundant protection to the shell. In some embodiments of the present application, the pressure relief portion is formed in the middle of the first wall, and both opposite sides of the pressure relief hole have air flow grooves. So set up, the both sides that the pressure release hole is relative have the air current groove, can improve the exhaust equilibrium in the both sides that the pressure release hole is relative. In some embodiments of the application, the size of the air flow slot in the first direction is in the range of 0.5mm to 1.8mm. So set up, not only can satisfy the circulation demand of the interior gaseous of air current groove, satisfy the exhaust demand, can guarantee the structural strength of air current groove department pr