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CN-121983722-A - Cover plate assembly, battery and electricity utilization device

CN121983722ACN 121983722 ACN121983722 ACN 121983722ACN-121983722-A

Abstract

The invention relates to the technical field of new energy and discloses a cover plate assembly, a battery and an electric device, wherein the cover plate assembly comprises a cover plate body, a battery and an electric device, wherein the cover plate body comprises a body part, a pole mounting hole is formed in the cover plate body in a penetrating manner, a cantilever part is formed around the pole mounting hole, and the cantilever part is formed by extending from the body part to one side close to the pole mounting hole; the cover plate body is also provided with a flanging part surrounding the pole mounting hole, and one side surface of the cantilever part, which faces the flanging part along the first direction, is non-planar. According to the cover plate assembly provided by the invention, the cantilever part is provided with at least one reinforcing rib structure, so that the structural rigidity and the bending resistance of the cantilever part are improved, and the stress concentration in a corner area is effectively dispersed. Particularly, the cantilever part is thickened along one side which is perpendicular to the first direction and is close to the body part, so that stress concentration in a root corner area is effectively dispersed, the bending resistance is improved, and the supporting strength of the cantilever part is ensured.

Inventors

  • LI HUIZHEN
  • XU JIULING

Assignees

  • 中创新航科技集团股份有限公司

Dates

Publication Date
20260505
Application Date
20260120

Claims (20)

  1. 1. A cover plate assembly, comprising: The cover plate comprises a cover plate body (1), wherein the cover plate body (1) comprises a body part (11) and a flanging part (14) surrounding a pole mounting hole (13) is formed in a penetrating manner along the first direction, a cantilever part (12) is formed around the pole mounting hole (13) by the cover plate body (1), the cantilever part (12) extends from a part of the body part (11) to one side close to the pole mounting hole (13), and the flanging part (14) extends from one side of the body part (11) along the first direction towards a direction far away from the body part (11); along the first direction, the surface of one side of the cantilever part (12) facing away from the flanging part (14) is flush with the surface of the body part (11) on the side, or exceeds the surface of the body part (11) on the side; the cantilever portion (12) is non-planar along the first direction toward a side surface of the burring portion (14).
  2. 2. The cover plate assembly according to claim 1, wherein in the first direction a surface of a side of the cantilever portion (12) facing away from the flange portion (14) exceeds a surface Mmm of the body portion (11) on that side, the cantilever portion (12) having a maximum thickness in the first direction of Nmm, satisfying Mmm > Nmm.
  3. 3. The cover plate assembly according to claim 1, wherein in the first direction a surface of a side of the cantilever part (12) facing away from the flange part (14) exceeds a surface Mmm of the body part (11) on that side, the cantilever part (12) having a maximum thickness in the first direction of Nmm, satisfying Mmm < Nmm.
  4. 4. The cover plate assembly according to claim 1, wherein the thickness of the cantilever portion (12) on a side facing away from the pole mounting hole (13) is greater than the thickness of the cantilever portion (12) on a side closer to the pole mounting hole (13) in a direction perpendicular to the first direction.
  5. 5. The cover plate assembly according to claim 4, wherein a side surface of the cantilever portion (12) facing the burring portion (14) in the first direction is configured to be stepped.
  6. 6. The cover plate assembly according to claim 5, wherein a side surface of the cantilever portion (12) facing the burring portion (14) in the first direction includes at least two lands, and a step surface connected between adjacent lands; The height of each mesa is gradually reduced in a direction approaching the pole mounting hole (13).
  7. 7. The cover plate assembly according to claim 6, wherein the step surface is inclined at an angle β° to the body portion (11), satisfying 0 ° - β ° -90 °.
  8. 8. The cover plate assembly of claim 6, wherein the counter top comprises a first counter top (121) furthest away from the pole mounting hole (13) in a direction perpendicular to the first direction, and a second counter top (122) closest to the pole mounting hole (13) in a direction perpendicular to the first direction; along the first direction, the height difference between the first table surface (121) and the second table surface (122) is Dmm, and the height difference is Dmm and is smaller than or equal to 0.1mm and smaller than or equal to 0.95mm.
  9. 9. The cover plate assembly according to any one of claims 1 to 8, wherein the body portion (11) is provided with a groove portion (15) at the periphery of the burring portion (14) facing away from the pole mounting hole (13), and the groove portion (15) is opened on one side surface of the body portion (11) where the burring portion (14) is formed; along the first direction, the thickness of the area of the body part (11) corresponding to the groove part (15) is Emm, and Emm is more than or equal to 0.8mm and less than or equal to 3.2mm.
  10. 10. The cover plate assembly according to any one of claims 1 to 8, further comprising a pole (2), the pole (2) being threaded into the pole mounting hole (13) and being at least partially overlapping the cantilever portion (12); a sealing ring (6) is arranged between the pole (2) and the cantilever part (12).
  11. 11. The cover plate assembly according to claim 10, wherein the seal ring (6) abuts against a side surface of the cantilever portion (12) toward the burring portion (14) in the first direction, the seal ring (6) is of a non-uniform thickness structure, and the thickness of the seal ring (6) is gradually increased in a direction approaching the post mounting hole (13).
  12. 12. The cover plate assembly according to claim 10, characterized in that the sealing ring (6) has a thickness Fmm; The surface of one side of the sealing ring (6) away from the flanging part (14) along the first direction does not exceed the surface of one side of the cantilever part (12) away from the flanging part (14) along the first direction, so that Fmm is more than or equal to 1.2mm and less than or equal to 3mm; Or one side surface of the sealing ring (6) deviating from the flanging part (14) along the first direction exceeds one side surface of the cantilever part (12) deviating from the flanging part (14) along the first direction, so that Fmm is more than or equal to 1.2mm and less than or equal to 5mm is satisfied.
  13. 13. A cover plate assembly according to claim 10, characterized in that the sealing ring (6) is of unitary construction.
  14. 14. The cover plate assembly according to claim 10, wherein the sealing ring (6) is of a split structure, the sealing ring (6) comprises at least two sub-sealing rings (61), two adjacent sub-sealing rings (61) are arranged at intervals along the direction perpendicular to the first direction, and the interval distance between two adjacent sub-sealing rings (61) along the direction perpendicular to the first direction is Gmm, so that 0.2mm is less than or equal to Gmm is less than or equal to 1.0mm.
  15. 15. Cover plate assembly according to claim 10, wherein the sealing ring (6) extends in a direction close to the pole mounting hole (13) and beyond the end of the cantilever part (12), the sealing ring (6) at least partly covering the end face of the cantilever part (12) facing the pole mounting hole (13) and being in sealing engagement with the peripheral wall of the pole (2).
  16. 16. The cover plate assembly according to any one of claims 1 to 8, wherein the thickness of the burring (14) in the first direction is greater on the side closer to the body portion (11) than on the side farther from the body portion (11).
  17. 17. The cover plate assembly according to claim 16, wherein the thickness of the flange portion (14) on the side close to the body portion (11) in the first direction is H mm, satisfying 0.8 mm-Hmm-3.5 mm.
  18. 18. The cover plate assembly according to claim 16, wherein the thickness of the flange portion (14) on the side remote from the body portion (11) in the first direction is J mm, satisfying 0.6-1.5 mm.
  19. 19. The cover plate assembly according to claim 16, wherein a difference between a thickness of a side of the burring (14) close to the body portion (11) and a thickness of a side remote from the body portion (11) in the first direction satisfies 0.1mm +. Hmm-Jmm +.2.2 mm.
  20. 20. The cover plate assembly according to any one of claims 1 to 8, wherein the flange portion (14) forms an R-angle transition along the first direction on a side near the body portion (11), the radius of the R-angle being Kmm, satisfying 0.2mm +. Kmm +.2 mm.

Description

Cover plate assembly, battery and electricity utilization device Technical Field The invention relates to the technical field of new energy, in particular to a cover plate assembly, a battery and an electric device. Background In the field of battery manufacturing, a battery cover plate is normally provided with a pole through hole so that a pole penetrates through and realizes electric connection between the inside and the outside of a battery. And a cantilever structure for supporting the pole is extended from the cover plate around the pole through hole. However, the cantilevers surrounding the through holes of the pole in the related art are mostly planar structures, the supporting strength is insufficient, deformation easily occurs when the cantilever is stressed, the pole is easy to loosen or fail in sealing, and the safety of the battery is further affected. Disclosure of Invention In view of the above, the present invention provides a cover plate assembly, a battery and an electric device to solve the problem of insufficient supporting strength of the cantilever structure surrounding the via hole of the pole. In a first aspect, the present invention provides a cover plate assembly comprising: The cover plate body comprises a body part, and the thickness direction of the body part is defined as a first direction; the cover plate body is also provided with a flanging part surrounding the pole mounting hole, and the flanging part is formed by extending one side of the body part along the first direction towards a direction far away from the body part; Along the first direction, the surface of one side of the cantilever part, which is away from the flanging part, is flush with the surface of the body part, which is located on the side, or exceeds the surface of the body part, which is located on the side; The cantilever portion is non-planar along a first direction toward a side surface of the burring portion. The cover plate body has the beneficial effects that the surface of one side of the cantilever part, facing the flanging part along the first direction, of the cover plate body is non-planar, so that at least one reinforcing rib structure is formed on the cantilever part, the structural rigidity and the bending resistance of the cantilever part are improved, and the stress concentration in a corner area is effectively dispersed. Particularly, the cantilever part is thickened along one side which is perpendicular to the first direction and is close to the body part, so that stress concentration in a root corner area is effectively dispersed, the bending resistance is improved, and the supporting strength of the cantilever part is ensured. In a second aspect, the present invention also provides a battery comprising: The cover plate assembly and the shell are enclosed together to form a containing cavity; and the battery cell is arranged in the accommodating cavity. Because the battery includes the cap assembly, it has the same effect as the cap assembly, and thus, a detailed description thereof will be omitted. In a third aspect, the present invention also provides an electrical device, including: The power utilization device comprises a power utilization device body and a battery, wherein the battery is electrically connected with the power utilization device body. Because the electricity utilization device comprises the cover plate component, the electricity utilization device has the same effect as the cover plate component, and the description is omitted herein. Drawings In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art. FIG. 1 is a schematic view of a battery of the present invention; FIG. 2 is an exploded view of the battery of the present invention; FIG. 3 is a top view of the battery of the present invention; FIG. 4 is a schematic view of section A-A of FIG. 3; FIG. 5 is an enlarged view of a portion of FIG. 4; FIG. 6 is an exploded view of the cover plate assembly of the present invention; FIG. 7 is a top view of the cover plate body of the present invention; FIG. 8 is a schematic view of the cover body of the present invention in an unfolded state along section B-B of FIG. 7; FIG. 9 is a schematic view of the cover body of the present invention in a folded condition taken along section B-B of FIG. 7; FIG. 10 is an enlarged view of a portion of FIG. 9 at C; FIG. 11 is an enlarged view of a portion of the cover body mated with the seal ring; FIG. 12 is an enlarged view of a portion of the cover body mated with another seal ring; FIG. 13 is an enlarged view of a portion of the cover body of