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CN-224232755-U - Battery cell cover plate assembly and battery cell

CN224232755UCN 224232755 UCN224232755 UCN 224232755UCN-224232755-U

Abstract

The utility model relates to the technical field of batteries, and discloses a battery cell cover plate assembly and a battery cell. The battery cell cover plate assembly comprises a cover plate body and a lower plastic structure, wherein the lower plastic structure is attached to one side, facing the battery cell, of the cover plate body, the lower plastic structure comprises a first plate and a second plate which are connected with each other, the first plate is provided with a first step part, the second plate is provided with a second step part, the first step part and the second step part are clamped to form a groove, the first step part is provided with a clamping ring, the second step part is provided with a clamping column, and the clamping ring is clamped to the clamping column. According to the split type lower plastic plate of the battery cell cover plate assembly, the clamping rings and the clamping columns are respectively designed on the split type lower plastic plate of the battery cell cover plate assembly, the plate with the longer length is supported by the clamping assembly limit of the tail end of the plate, the sagging height is prevented from being overlarge, meanwhile, the assembly limit between the first step part and the second step part is relied on, the lower plastic structure is prevented from shaking along the width direction, the battery cell is prevented from being manufactured poorly, the production efficiency is improved, and the production cost is reduced.

Inventors

  • GAO SHUNHANG

Assignees

  • 蜂巢能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250423

Claims (10)

  1. 1. The battery cell cover plate assembly is characterized by comprising a cover plate body (4) and a lower plastic structure, wherein the lower plastic structure is attached to one side of the cover plate body (4) facing a battery cell; The lower plastic structure comprises a first plate (1) and a second plate (2) which are connected with each other, one end of the first plate (1) facing the second plate (2) is provided with a first step portion (12), one end of the second plate (2) facing the first plate (1) is provided with a second step portion (22), the first step portion (12) and the second step portion (22) are clamped with each other to form a groove (3) opposite to the explosion-proof valve, wherein the first step portion (12) is provided with a clamping ring (14), the second step portion (22) is provided with a clamping column (24), and the clamping ring (14) is clamped with the clamping column (24).
  2. 2. The cell cover assembly according to claim 1, wherein an end of the first step portion (12) facing the second step portion (22) is provided with an outwardly extending mating member (13), an end of the second step portion (22) facing the first step portion (12) is provided with an inwardly recessed mating hole (23), and the mating member (13) is shape-fitted in the mating hole (23); And the clamping ring (14) is arranged on one side surface of the matching piece (13) facing the cover plate body (4), the clamping column (24) is arranged on one side of the matching hole (23) facing the cover plate body (4), and two ends of the clamping column (24) are fixed on the second step part (22).
  3. 3. The battery cell cover plate assembly according to claim 2, wherein the clamping columns (24) extend along the width direction of the second plate (2), two connecting plates (25) are respectively arranged at two end edges of the matching holes (23) along the width direction of the second plate (2), the connecting plates (25) extend obliquely in a direction away from the cover plate body (4) compared with the second plate (2), and two ends of the clamping columns (24) are respectively fixed on the two connecting plates (25).
  4. 4. A cell cover assembly according to claim 3, wherein the number of the clamping posts (24) is one, the number of the clamping rings (14) is at least two, and at least two clamping rings (14) are distributed at intervals along the width direction of the first plate (1).
  5. 5. A cell cover assembly according to claim 3, wherein the number of the clamping posts (24) is at least two, and at least two of the clamping posts (24) are distributed at intervals along the length direction of the second plate (2); At least two groups of clamping rings (14) are arranged on the surface of one side, facing the cover plate body (4), of the matching piece (13), the at least two groups of clamping rings (14) are distributed at intervals along the length direction of the first plate (1), and each group of clamping rings (14) comprises at least two clamping rings (14) distributed at intervals along the width direction of the first plate (1).
  6. 6. The cell cover assembly according to claim 2, wherein the inner diameter of the clamping ring (14) is X, the value range is 0.6 mm-5 mm, and the opening angle of the clamping ring (14) is B, the value range is 10 DEG-70 deg.
  7. 7. The cell cover assembly according to claim 2, characterized in that the clamping ring (14) is arranged not beyond a side surface of the first plate (1) facing the cell, and that the sum of the thicknesses of the clamping ring (14) and the mating piece (13) is smaller than the total thickness of the first plate (1).
  8. 8. The cell cover assembly according to any one of claims 2 to 7, wherein the width of the mating piece (13) is M, the value range of which is 5 mm-70 mm, and the thickness of the mating piece (13) is a, the value range of which is 0.7 mm-2 mm.
  9. 9. The cell cover assembly according to any one of claims 2 to 7, wherein a gap between the fitting piece (13) and the fitting hole (23) in a width direction along the first plate (1) or the second plate (2) is P, which ranges from 0.05mm < p≤2 mm.
  10. 10. A battery cell comprising a battery cell cover assembly according to any one of claims 1 to 9.

Description

Battery cell cover plate assembly and battery cell Technical Field The utility model relates to the technical field of batteries, in particular to a battery cell cover plate assembly and a battery cell. Background In the related art, at present, a plastic part under a battery cell cover plate of a power battery is generally in a split design. Specifically, the lower plastic is assembled and limited through the pole. The basic idea of this design is to use the pole as a fixing point to ensure that the lower plastic can be firmly mounted under the battery cover plate to protect the internal components and maintain the stability of the overall structure. Although the above scheme achieves the design purpose to a certain extent, some remarkable technical defects are also exposed in practical application, for example, the existing lower plastic structure has the problem of insufficient limiting capability due to the fact that the assembly limiting is carried out only by means of the polar posts, and the shaking of the components is easy to occur in the using process. Moreover, when the length of the lower plastic is too long, sagging may occur at the ends thereof, affecting the stability and aesthetic properties of the entire structure, and possibly causing interference or poor contact with other components. In addition, if the lower plastic is not properly assembled and is loosened or shifted, key components (such as an explosion-proof valve) in the battery can be influenced, so that the overall safety of the battery is reduced. Disclosure of utility model In view of the above, the present utility model provides a battery cell cover assembly and a battery cell, so as to solve the problem of poor installation stability of the battery cell cover assembly in the related art. The utility model provides a battery cell cover plate assembly, which comprises a cover plate body and a lower plastic structure, wherein the lower plastic structure is attached to one side, facing a battery cell, of the cover plate body, the lower plastic structure comprises a first plate and a second plate which are connected with each other, a first step part is arranged at one end, facing the second plate, of the first plate, a second step part is arranged at one end, facing the first plate, of the second plate, the first step part and the second step part are mutually clamped to form a groove opposite to an explosion-proof valve, a clamping ring is arranged at the first step part, a clamping column is arranged at the second step part, and the clamping ring is clamped to the clamping column. The split type lower plastic plate of the battery cell cover plate assembly has the advantages that the clamping rings and the clamping columns are respectively designed on the split type lower plastic plate of the battery cell cover plate assembly, the plate with the longer length is supported by the clamping assembly limit of the tail end of the plate, the sagging height is prevented from being overlarge, meanwhile, the lower plastic structure is prevented from shaking along the width direction by means of the assembly limit between the first step part and the second step part, the battery cell is prevented from being manufactured poorly, the production efficiency is improved, and the production cost is reduced. In an alternative embodiment, one end of the first step part facing the second step part is provided with an outwards extending matching piece, one end of the second step part facing the first step part is provided with an inwards concave matching hole, and the matching piece is matched in the matching hole in a shape; The clamping ring is arranged on one side surface of the matching piece, which faces the cover plate body, the clamping column is arranged on one side of the matching hole, which faces the cover plate body, and two ends of the clamping column are fixed on the second step part. The electric core cover plate assembly has the advantages that the electric core cover plate assembly can be prevented from shaking in the width direction due to the design of the matching piece and the matching hole, the integrity of the surface of the groove can be achieved due to the design of the matching piece and the matching hole, the electric core can be completely covered, and the insulation capability of the electric core can be guaranteed. Meanwhile, the positions of the clamping rings and the clamping columns are selected to avoid interference with other parts of the battery cell on the premise of ensuring complete coverage. In an optional implementation manner, the clamping post extends along the width direction of the second plate, two connecting plates are respectively arranged at two end edges of the matching hole along the width direction of the second plate, the connecting plates are obliquely extended towards the direction away from the cover plate body compared with the second plate, and two ends of the clamping post are respectively f