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CN-224232896-U - Battery cell and electronic equipment

CN224232896UCN 224232896 UCN224232896 UCN 224232896UCN-224232896-U

Abstract

The utility model provides a battery cell and an electronic device, the battery cell comprises a shell, a top cover plate, a battery cell body and an insulating coating piece. The insulating cladding piece cladding is in the outside of electric core body, and insulating cladding piece includes top surface cladding piece and is used for insulating electric core body and holds the casing insulation part of chamber wall. The shell insulation part and the top surface coating sheet of the insulation coating piece can complete full coating of the battery cell body, and short circuit risks between the battery cell body and the shell are prevented. The top surface cladding piece is located between lamina tecti and the electric core body to replace the lower plastic design of electric core, and isolated electric core body and lamina tecti, avoid electric core body and the conductive connection between lamina tecti, guaranteed the insulating properties of electric core, promote electric core inner space utilization and electric core energy density.

Inventors

  • CHEN MINJIAN

Assignees

  • 远景动力技术(湖北)有限公司
  • 远景动力技术(江苏)有限公司
  • 远景睿泰动力技术(上海)有限公司

Dates

Publication Date
20260512
Application Date
20250523

Claims (10)

  1. 1. A kind of electric core, characterized by comprising the following steps: A housing including a receiving cavity, a top surface of the receiving cavity including an opening; The top cover plate is sealed on the opening and comprises a cover plate body, a first terminal and a second terminal which are installed on the cover plate body in an insulating way; The battery cell body is arranged in the accommodating cavity and comprises a first tab and a second tab which are arranged facing the opening; The insulating cladding piece is cladded outside the battery cell body and comprises a shell insulating part for isolating the battery cell body from the cavity wall of the accommodating cavity; The insulating cladding piece further comprises a top surface cladding piece, wherein the top surface cladding piece is arranged between the cover plate body and the battery cell body and is integrally connected with the shell insulating part; The top surface cladding sheet comprises a first through hole and a second through hole, the first tab passes through the first through hole to be electrically connected with the first terminal, and the second tab passes through the second through hole to be electrically connected with the second terminal.
  2. 2. The battery cell according to claim 1, wherein the top surface coating sheet further comprises a first top surface coating sheet and a second top surface coating sheet which are stacked along the opening direction, projections of the first top surface coating sheet and the second top surface coating sheet on the top cover plate are at least partially overlapped, a first notch is formed in one side edge of the first top surface coating sheet, which is away from the insulating part of the shell, and a second notch is formed in one side edge of the second top surface coating sheet, which is away from the insulating part of the shell, and the first notch and the second notch surround the first through hole and the second through hole.
  3. 3. The cell of claim 2, wherein the top cover plate further comprises a liquid injection hole, the first top cover plate is provided with a plurality of third through holes, the second top cover plate is provided with a plurality of fourth through holes, the projection of the third through holes on the top cover plate coincides with the projection of the liquid injection hole, the projection of the fourth through holes on the top cover plate coincides with the projection of the liquid injection hole, and the projection of the third through holes and the projection of the fourth through holes on the top cover plate at least partially coincides.
  4. 4. The cell of claim 2, wherein the housing insulation comprises a front cover sheet, a bottom cover sheet, and a back cover sheet integrally connected in sequence, the first top cover sheet is connected to the front cover sheet, the second top cover sheet is connected to the back cover sheet, and the insulation cover is expandable into a planar configuration.
  5. 5. The cell of claim 4, wherein the housing insulator further comprises at least one set of side cover sheet assemblies, the side cover sheet assemblies comprising a first side cover sheet integrally connected to the front cover sheet and a second side cover sheet integrally connected to the back cover sheet, the first side cover sheet at least partially overlapping the second side cover sheet.
  6. 6. The cell of claim 5, wherein the side cover assembly further comprises a third side cover integrally connected to the bottom cover, the third side cover at least partially overlapping the first side cover and/or the third side cover at least partially overlapping the second side cover.
  7. 7. The cell of claim 2, further comprising a fixture covering the housing insulator, the first top cover sheet, and the second top cover sheet.
  8. 8. The cell of claim 1, wherein the top cover plate further comprises an explosion-proof valve, wherein the top cover plate is provided with a thinned portion, and wherein a projection of the explosion-proof valve onto the top cover plate covers a projection of the thinned portion.
  9. 9. The battery cell according to claim 1, wherein the top cover plate further comprises an explosion-proof valve, a plurality of fifth through holes are formed in the top surface coating sheet, projections of the explosion-proof valve on the top cover plate cover projections of the fifth through holes, and the fifth through holes are arranged in a strip-shaped or annular interval mode.
  10. 10. An electronic device, characterized in that it comprises a cell according to any one of claims 1 to 9.

Description

Battery cell and electronic equipment Technical Field The utility model relates to the technical field of batteries, in particular to a battery cell and electronic equipment. Background With the development of new energy automobiles, blade-type batteries with high space utilization have been developed in order to pursue higher energy density. The battery cells of the existing partial blade batteries are arranged on the same side, namely the positive electrode and the negative electrode of the battery cells are positioned on the same side, so that the purposes of simplifying the design of a battery pack, reducing internal resistance and the like are achieved. Before the battery cell body is installed into the shell, the battery cell body needs to be coated by an insulating coating film which is soft and has good flexibility, so that the shell is prevented from damaging the battery cell body, and the risk of short circuit between the battery cell body and the shell is prevented. At present, the mode of cladding the battery cell body is to clad the bottom and the side part of the bare cell generally, and the top surface of the battery cell body, namely one side of the battery cell body in the direction of the electrode tab is isolated from the battery cell body and the top cover plate made of metal materials through the lower plastic part, so that the short circuit between the bare cell and the shell is avoided. However, due to the limitation of the lower plastic structural member, the space utilization rate of the battery cell in the tab-out direction is relatively low, and the energy density of the battery cell needs to be further improved. Disclosure of utility model In view of the above problems in the prior art, the present utility model provides a battery case, a secondary battery, and a battery pack, so as to improve the technical problem that the space utilization of the existing battery cell in the tab-out direction is relatively low, and the energy density of the battery cell needs to be further improved. In order to solve the technical problem, a first aspect of the present utility model provides a battery cell, which includes a housing, a top cover plate, a battery cell body and an insulating coating. The housing includes a receiving cavity, and a top surface of the receiving cavity includes an opening. The top cover plate is sealed to be closed on the opening, and the top cover plate comprises a cover plate body and a first terminal and a second terminal which are installed on the cover plate body in an insulating mode. The battery cell body is installed in the accommodating cavity, and the battery cell body comprises a first tab and a second tab which are arranged facing the opening. The insulating cladding piece cladding in the outside of electric core body, insulating cladding piece is including being used for keeping apart electric core body with hold the casing insulation part of chamber wall. The insulating cladding piece further comprises a top surface cladding piece, wherein the top surface cladding piece is arranged between the cover plate body and the battery cell body and integrally connected with the shell insulating part. The top surface cladding sheet comprises a first through hole and a second through hole, the first tab passes through the first through hole to be electrically connected with the first terminal, and the second tab passes through the second through hole to be electrically connected with the second terminal. In an embodiment of the utility model, the top surface coating sheet further includes a first top surface coating sheet and a second top surface coating sheet stacked along the opening direction, and projections of the first top surface coating sheet and the second top surface coating sheet on the top cover plate are at least partially overlapped. The first top surface cladding piece deviates from the first notch is offered to the side of casing insulating part, the second top surface cladding piece deviates from the second notch is offered to the side of casing insulating part, first notch with the second notch is around forming first through-hole with the second through-hole. In an embodiment of the battery cell of the present utility model, the top cover plate further includes a liquid injection hole, the first top surface coating sheet is provided with a plurality of third through holes, the second top surface coating sheet is provided with a plurality of fourth through holes, the projection of the third through holes on the top cover plate coincides with the projection of the liquid injection hole, the projection of the fourth through holes on the top cover plate coincides with the projection of the liquid injection hole, and the projection of the third through holes and the projection of the fourth through holes on the top cover plate coincides at least partially. In an embodiment of the utility model, the insulating part of the casing includes a front cover