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CN-224217628-U - Battery pack and power utilization device

CN224217628UCN 224217628 UCN224217628 UCN 224217628UCN-224217628-U

Abstract

The embodiment of the utility model provides a battery pack and an electric device, wherein the battery pack comprises a box body, a cover plate and a mounting assembly, the mounting assembly comprises a first fastener, a second fastener and a sealing piece, the sealing piece is arranged between the box body and the cover plate in a sealing mode, the first fastener is connected with the box body, the second fastener is connected with the cover plate, a through hole is formed in the sealing piece, the first fastener comprises a first mounting part, the first mounting part is fixed in the through hole, a mounting hole is formed in the first fastener, the second fastener is in threaded connection with the hole wall of the mounting hole, the second fastener extends out of the first mounting part from the end portion of the mounting hole, and a buffer gap is formed between the hole wall of the through hole and the first mounting part. According to the utility model, the buffer gap is arranged between the first mounting part and the through hole wall of the sealing element, so that the expansion deformation part of the sealing element is prevented from entering the mounting interface between the first fastening piece, the second fastening piece and the cover plate, and the connection strength of the fastening pieces and the sealing effect of the battery pack are improved.

Inventors

  • ZHAO MENG

Assignees

  • 欣旺达动力科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250529

Claims (10)

  1. 1. A battery pack characterized by comprising a box body (51), a cover plate (52) and a mounting assembly; the mounting assembly comprises a first fastener (1), a second fastener (3) and a sealing piece (2); The sealing piece (2) is arranged between the box body (51) and the cover plate (52) in a sealing mode, the first fastening piece (1) is connected with the box body (51), and the second fastening piece (3) is connected with the cover plate (52); The sealing piece (2) is provided with a through hole (21), the first fastening piece (1) comprises a first installation part (11), the first fastening piece (1) is arranged in the through hole (21) in a penetrating mode, the first installation part (11) is fixed in the through hole (21), the first fastening piece (1) is internally provided with an installation hole (10), the second fastening piece (3) is in threaded connection with the hole wall of the installation hole (10), and the second fastening piece (3) extends out of the first installation part (11) from the end part of the installation hole (10); a buffer gap (4) is formed between at least a partial region of the wall of the through hole (21) and at least a partial region of the first mounting portion (11).
  2. 2. The battery pack according to claim 1, wherein the first mounting portion (11) is provided with a first notch (41) to form the buffer gap (4).
  3. 3. The battery pack according to claim 2, wherein the first notch (41) is located at an end of the first mounting portion (11) near the second fastener (3).
  4. 4. The battery pack according to claim 2, wherein the first notch (41) is a chamfer notch or an annular notch.
  5. 5. The battery pack according to claim 1, wherein the walls of the through-holes (21) are provided with second notches (42) to form buffer gaps (4).
  6. 6. The battery pack according to claim 5, wherein the second notch (42) is provided circumferentially along the hole wall of the through hole (21).
  7. 7. The battery pack according to any one of claims 1 to 6, wherein the first fastener (1) is detachably connected to the case (51).
  8. 8. The battery pack according to claim 7, wherein the first fastener (1) further comprises a second mounting portion (12); the second installation part (12) is fixedly connected with the first installation part (11), and the second installation part (12) is detachably connected with the box body (51).
  9. 9. The battery pack according to claim 8, wherein the first mounting portion (11) is in contact with a surface of the case (51) facing the sealing member (2), the second mounting portion (12) is provided penetrating into the case (51), and an outer diameter of a portion of the first mounting portion (11) in contact with the surface of the case (51) is larger than an outer diameter of the second mounting portion (12).
  10. 10. An electrical device comprising a battery pack according to any one of claims 1 to 9.

Description

Battery pack and power utilization device Technical Field The utility model belongs to the technical field of power batteries, and particularly relates to a battery pack and an electric device. Background With the development of new energy technology, the sealing performance of the battery pack serving as a main source of power has important significance. The battery pack is internally provided with a plurality of exposed metal conductors for conduction, and in order to prevent safety accidents caused by short circuit when water vapor enters the battery pack, the battery pack is generally designed into a sealed cavity. In the related art, a battery pack is generally sealed by adopting silica gel foam, and a rivet nut is arranged on a sealing interface to serve as a limiting block. When the sealing foam is extruded under high temperature, humid or external force, the sealing foam is easy to expand and deform, and the deformed part enters into the mounting interface of the rivet nut, so that the sealing effect of the battery pack is affected. Disclosure of utility model The embodiment of the utility model aims to provide a mounting assembly, a battery pack and an electric device, which can solve the problem that the sealing effect of the battery pack is affected due to bulge deformation of sealing foam in the related art. In order to solve the technical problems, the utility model is realized as follows: In a first aspect, an embodiment of the present utility model provides a battery pack, including a case, a cover plate, and a mounting assembly; The mounting assembly comprises a first fastener, a second fastener and a sealing element; the sealing piece is arranged between the box body and the cover plate in a sealing way, the first fastening piece is connected with the box body, and the second fastening piece is connected with the cover plate; The sealing piece is provided with a through hole, the first fastening piece comprises a first installation part, the first fastening piece penetrates through the through hole, the first installation part is fixed in the through hole, the first fastening piece is internally provided with an installation hole, the second fastening piece is in threaded connection with the hole wall of the installation hole, and the second fastening piece extends out of the first installation part from the end part of the installation hole; And a buffer gap is formed between at least part of the area of the hole wall of the through hole and at least part of the area of the first mounting part. Optionally, a first notch is provided on the first mounting portion to form the buffer gap. Optionally, the first notch is located at an end of the first mounting portion near the second fastener. Optionally, the first notch is a chamfer notch or an annular notch. Optionally, a second notch is formed on the hole wall of the through hole to form a buffer gap. Optionally, the second notch is circumferentially disposed along a hole wall of the through hole. Optionally, the first fastener is detachably connected with the box body. Optionally, the first fastener further comprises a second mounting portion; The second installation part is fixedly connected with the first installation part, and the second installation part is detachably connected with the box body. Optionally, the first mounting portion contacts with the surface of the box facing the sealing member, the second mounting portion penetrates into the box, and the outer diameter of the contact part of the first mounting portion and the surface of the box is larger than the outer diameter of the second mounting portion. In a second aspect, an embodiment of the present utility model provides an electrical device, including a battery pack according to any one of the embodiments above. According to the battery pack provided by the embodiment of the utility model, the sealing element is arranged between the box body and the cover plate in a sealing way, the first fastening piece is connected with the box body, and the second fastening piece is connected with the cover plate. The first fastener is in threaded connection fit with the second fastener, and the second fastener is in threaded connection with the hole wall of the mounting hole of the first fastener and extends out of the first fastener from the end part of the mounting hole. The sealing piece is provided with a through hole, the first fastening piece penetrates through the through hole, and the first installation part of the first fastening piece is fixed in the through hole. A buffer gap is formed between at least a part of the hole wall of the through hole and at least a part of the first mounting portion, i.e. the hole wall of the through hole is not completely attached to the first mounting portion, and there is a buffer gap between the two, and the buffer gap may be located on the hole wall of the through hole and/or the buffer gap may be located on the first mounting portion. When th