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CN-224232855-U - Explosion-proof casing, electric core and battery module

CN224232855UCN 224232855 UCN224232855 UCN 224232855UCN-224232855-U

Abstract

The utility model relates to the technical field of energy storage equipment, in particular to an explosion-proof shell, a battery cell and a battery module, wherein the explosion-proof shell comprises a shell body, an explosion-proof valve, a first cover plate, a positive electrode output end and a negative electrode output end, a first cover plate sealing cover is arranged at an opening of one end of the shell body along the length direction of the shell body, the explosion-proof valve is arranged on the first side wall of one end of the shell body along the width direction of the shell body, the explosion-proof valve is close to the first side wall and is arranged away from the first end of the first cover plate along the length direction of the shell body, and the positive electrode output end and the negative electrode output end are both arranged on the first cover plate. The battery cell comprises a pole group and the explosion-proof shell, and the pole group is arranged in the explosion-proof shell. The battery module comprises a plurality of electric cores, the electric cores are sequentially arranged along the thickness direction of the battery module to form one or more rows of electric cores, and the explosion-proof valve of any electric core does not face any other electric core. The explosion-proof shell, the battery cell and the battery module can prevent thermal runaway from spreading and improve safety.

Inventors

  • XU LEI
  • Xu tongli

Assignees

  • 蜂巢能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250509

Claims (10)

  1. 1. The explosion-proof shell is characterized by comprising a shell body (1), an explosion-proof valve (2), a first cover plate (3), an anode output end (4) and a cathode output end (5), wherein the first cover plate (3) is sealed to be arranged at an opening of one end of the shell body (1) along the length direction of the shell body, the explosion-proof valve (2) is arranged on a first side wall (11) of one end of the shell body (1) along the width direction of the shell body, the explosion-proof valve (2) is close to the first side wall (11) and is arranged at a position away from the first end (111) of the first cover plate (3) along the length direction of the shell body (1), and the anode output end (4) and the cathode output end (5) are all arranged on the first cover plate (3).
  2. 2. Explosion-proof housing according to claim 1, characterized in that a minimum distance a between the edge of the explosion-proof valve (2) and the edge of the first end (111) is fulfilled, a being ≡10mm.
  3. 3. The explosion-proof housing according to claim 1, wherein the maximum distance between the edge of the explosion-proof valve (2) and the edge of the first end (111) is b, and the dimension of the first side wall (11) along the length direction of the housing body (1) is c, satisfying b < c/2.
  4. 4. The explosion-proof housing according to claim 1, wherein at least two explosion-proof valves (2) are provided, and at least two of the explosion-proof valves (2) are sequentially arranged on the first side wall (11) at intervals along the length direction of the housing body (1).
  5. 5. An explosion proof housing according to claim 4, wherein the spacing d between two adjacent explosion proof valves (2) is satisfied, d >10mm; And/or the maximum distance between the edge of the explosion-proof valve (2) far away from the first end (111) and the edge of the first end (111) in at least two explosion-proof valves (2) is e, and the dimension of the first side wall (11) along the length direction of the shell body (1) is c, so that e < c/2 is satisfied.
  6. 6. The explosion-proof housing according to any one of claims 1-5, further comprising a side plate (6), wherein the side plate (6) is disposed on the inner side of the first side wall (11), a plurality of exhaust holes (61) are formed in the side plate (6), and at least part of the exhaust holes (61) are formed corresponding to the explosion-proof valve (2).
  7. 7. The explosion-proof housing according to claim 6, wherein an exhaust groove is formed in one end of the side plate (6) facing away from the first side wall (11), the exhaust groove extends along the length direction of the housing body (1), and the exhaust hole (61) is formed in the bottom of the exhaust groove.
  8. 8. The explosion-proof housing according to claim 6, wherein the side plate (6) has a first region (601) and a second region (602), the plurality of exhaust holes (61) are located partially in the first region (601), and partially in the second region (602), the first region (601) corresponds to the explosion-proof valve (2), and the second region (602) and the first region (601) are symmetrically arranged along the length direction of the housing body (1).
  9. 9. A battery cell, characterized by comprising a pole group (200) and an explosion proof housing according to any of claims 1-8, the pole group (200) being arranged within the explosion proof housing (100).
  10. 10. The battery module is characterized by comprising a plurality of electric cores according to claim 9, wherein the electric cores are sequentially arranged along the thickness direction of the battery module to form one or more rows of electric cores, and the explosion-proof valve (2) of any electric core is not oriented to any other electric core.

Description

Explosion-proof casing, electric core and battery module Technical Field The utility model relates to the technical field of energy storage equipment, in particular to an explosion-proof shell, a battery cell and a battery module. Background In order to improve the safety performance of the battery cell, a pressure relief mechanism such as an explosion-proof valve is usually arranged on the battery cell. When the internal air pressure of the battery cell is too high due to abnormal operation, the air can be discharged through the pressure release mechanism, so that large safety accidents such as explosion and the like are avoided. The explosion-proof valves of the current battery cells are all arranged on the cover plate, and output components such as a pole column with an electric connection function are also arranged on the cover plate. And when the battery module is used for arranging a plurality of electric cores, in order to shorten the length of an electric connecting piece between the electric cores, the output assemblies of the adjacent electric cores are generally arranged adjacently, namely the cover plates of the adjacent electric cores are arranged adjacently. When the short circuit occurs in the electrode group of a certain cell, the electrode group may be ignited, and along with the increase of the temperature and pressure in the cell, the explosion-proof valve is opened, and gas, electrolyte and slag are mixed with sparks to be rapidly discharged from the explosion-proof valve. And because the output components of the adjacent cells are arranged adjacently, the output components of the adjacent cells are affected by high temperature and sparks, and the insulating parts of the output components are easy to melt and lose efficacy, so that the adjacent cells are short-circuited, and thermal runaway is caused. This situation, once spread, causes serious safety accidents. Disclosure of utility model An object of the present utility model is to provide an explosion-proof case capable of preventing thermal runaway from spreading and improving safety of a battery module. To achieve the purpose, the utility model adopts the following technical scheme: The utility model provides an explosion-proof housing, including shell body, explosion-proof valve, first apron, anodal output and negative pole output, first apron sealed lid is established the opening part of shell body along self length direction one end, the explosion-proof valve sets up on the first lateral wall of shell body along self width direction one end, just the explosion-proof valve is close to first lateral wall is followed the length direction of shell body is kept away from first end setting of first apron, anodal output with the negative pole output all sets up on the first apron. Optionally, a minimum distance a between the edge of the explosion-proof valve and the edge of the first end is satisfied, a is equal to or greater than 10mm. Optionally, a maximum distance between an edge of the explosion-proof valve and an edge of the first end is b, and a dimension of the first sidewall along a length direction of the case body is c, satisfying b < c/2. Optionally, the explosion-proof valves are at least two, and the at least two explosion-proof valves are sequentially arranged on the first side wall at intervals along the length direction of the shell body. Optionally, the spacing d between two adjacent said explosion proof valves is satisfied, d >10mm; And/or the maximum distance between the edge of the explosion-proof valve far away from the first end and the edge of the first end in at least two explosion-proof valves is e, and the dimension of the first side wall along the length direction of the shell body is c, so that e < c/2 is satisfied. Optionally, the anti-explosion valve further comprises a side plate, the side plate is arranged on the inner side of the first side wall, a plurality of exhaust holes are formed in the side plate, and at least part of the exhaust holes are formed corresponding to the anti-explosion valve. Optionally, an exhaust groove is formed at one end of the side plate, which is away from the first side wall, the exhaust groove extends along the length direction of the shell body, and the exhaust hole is formed at the bottom of the exhaust groove. Optionally, the side plate has a first area and a second area, and a plurality of exhaust holes are located in part in the first area and in part in the second area, the first area corresponds to the explosion-proof valve, and the second area and the first area are symmetrically arranged along the length direction of the shell body. Another object of the present utility model is to provide a battery cell capable of preventing thermal runaway from spreading and improving the safety of a battery module. To achieve the purpose, the utility model adopts the following technical scheme: the battery cell comprises a pole group and the explosion-proof shell, wherein the pole