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EP-4742389-A1 - BATTERY AND ELECTRONIC APPARATUS

EP4742389A1EP 4742389 A1EP4742389 A1EP 4742389A1EP-4742389-A1

Abstract

A battery includes: a cell (1) provided with a tab (11); a protection board assembly (2) connected to a top end of the cell and provided with a conductive sheet (21), the conductive sheet being connected to the tab; and a head tape (3)having two ends respectively connected to front and back surfaces of a head of the cell and wrapped around a periphery of the protection board assembly, the head tape being provided with at least one layer of protective adhesive (31) at a position corresponding to the tab.

Inventors

  • WANG, Zhengchun
  • SUN, YALI
  • JIANG, ZIQIANG
  • ZONG, Yanzhen

Assignees

  • Zhuhai Cosmx Power Co., Ltd.

Dates

Publication Date
20260513
Application Date
20251111

Claims (15)

  1. A battery, comprising: a cell (1) provided with a tab (11); a protection board assembly (2) connected to a top end of the cell (1) and provided with a conductive sheet (21), the conductive sheet (21) being connected to the tab (11); and a head tape (3) having two ends respectively connected to front and back surfaces of the cell (1) and wrapped around a periphery of the protection board assembly (2), the head tape (3) being provided with at least one layer of protective adhesive (31) at a position corresponding to the tab (11).
  2. The battery according to claim 1, wherein a top sealing edge (12) is provided at the top end of the cell (1), the top sealing edge (12) comprises a first bent portion (121) and a flat portion (122), the flat portion (122) is parallel to an end face of the cell (1), the protection board assembly (2) is disposed on a surface of the flat portion (122) away from the cell (1), and a thickness direction of the protection board assembly (2) is in a height direction of the cell (1).
  3. The battery according to claim 1 or 2, wherein the tab (11) comprises a second bent portion (111) and a connecting portion (112), the conductive sheet (21) is formed with a U-shaped groove, and the connecting portion (112) is disposed in the U-shaped groove; and the protective adhesive (31) is disposed at the position corresponding to the second bent portion (111).
  4. The battery according to any one of claims 1 to 3, wherein the head tape (3) comprises a cell connecting portion (32) connected to the cell (1), and an end of the protective adhesive (31) in a height direction of the cell (1) extends to a first boundary of the cell connecting portion (32) on a side close to the protective adhesive (31), or is spaced apart from the first boundary.
  5. The battery according to any one of claims 1 to 4, wherein the head tape (31) comprises a top-surface connecting portion (33) connected to a top surface of the protection board assembly (2), and an end of the protective adhesive (31) in a height direction of the cell (1) extends to a second boundary of the top-surface connecting portion (33) on a side close to the protective adhesive (31), or is spaced apart from the second boundary.
  6. The battery according to any one of claims 1 to 5, wherein the protective adhesive (31) is disposed on an inner side of the head tape (3).
  7. The battery according to any one of claims 1 to 6, wherein the protective adhesive (31) has a length equal to or less than a length of the head tape (3) in a direction parallel to a width of the cell (1).
  8. The battery according to any one of claims 1 to 7, wherein a first double-sided adhesive (4) is provided between the protection board assembly (2) and the cell (1), at least two conductive sheets (21) are provided, a first flexible cushioning member (5) is provided in a gap between any two of the conductive sheets (21), one side of the first flexible cushioning member (5) is connected to the first double-sided adhesive (4), a second double-sided adhesive (6) is provided on the other side of the first flexible cushioning member (5), and the second double-sided adhesive (6) is connected to the protection board assembly (2).
  9. The battery according to claim 8, wherein the first flexible cushioning member (5) has a same thickness as the conductive sheet (21).
  10. The battery according to claim 8, wherein the first flexible cushioning member (5) has a greater thickness than the conductive sheet (21).
  11. The battery according to any one of claims 1 to 10, wherein the protection board assembly (2) comprises a protection board (22) and a flexible printed circuit board (23), the flexible printed circuit board (23) comprising a first end (231) and a second end (232) that are spaced apart by a preset distance; and the battery further comprises: a fixing adhesive (7) connected to a side surface of each of the first end (231) and the second end (232) that is close to the protection board (22).
  12. The battery according to any one of claim 11, further comprising a second flexible cushioning member (8) disposed between the first end (231) and the second end (232) and connected to the fixing adhesive (7) and the protection board (22).
  13. The battery according to claim 12, wherein the second flexible cushioning member (8) has a same thickness as the flexible printed circuit board (23), or the second flexible cushioning member (8) has a greater thickness than the flexible printed circuit board (23).
  14. The battery according to any one of claims 11 to 13, wherein the second flexible cushioning member (8) has a length less than or equal to a length of the fixing adhesive (7) in a direction perpendicular to a line connecting the first end (231) to the second end (232).
  15. An electronic apparatus, comprising a battery according to any one of claims 1 to 14.

Description

TECHNICAL FIELD The present invention relates to the technical field of battery structures, and in particular, to a battery and an electronic apparatus including the battery. BACKGROUND As a core component providing energy, a battery plays an important role in an electronic apparatus. The battery includes a cell and a protection board assembly. A tab of the cell is electrically connected to a conductive sheet of the protection board assembly. The protection board assembly is located at an end of the cell where the tab is located. After the protection board assembly is connected to the cell, a head tape is attached to the end of the cell where the tab is located, and is wrapped around a periphery of the protection board assembly. However, after the protection board assembly is connected to the cell, the tab may extend beyond an edge of the protection board assembly, and come into contact with the head tape. The tab is extremely thin, and thus has a very sharp end or bent portion, or the like, similar to a blade, which can easily cut through the head tape, leading to the risk of a short circuit caused by electric conduction between the tab and a chassis of the electronic apparatus. Therefore, how to prevent the tab from cutting through the head tape is an urgent problem to be solved by those skilled in the art. SUMMARY In view of this, an object of the present invention is to provide a battery, which prevents its tab from cutting through its head tape and has good safety. Another object of the present invention is to provide an electronic apparatus including the battery described above, which prevents a tab of the battery from cutting through a head tape of the battery and has good safety. In order to achieve the above objectives, the present invention provides the following technical solutions. A battery includes: a cell provided with a tab;a protection board assembly connected to a top end of the cell and provided with a conductive sheet, the conductive sheet being connected to the tab; anda head tape having two ends respectively connected to front and back surfaces of the cell and wrapped around a periphery of the protection board assembly, the head tape being provided with at least one layer of protective adhesive at a position corresponding to the tab. Optionally, a top sealing edge is provided at the top end of the cell, the top sealing edge includes a first bent portion and a flat portion, the flat portion is parallel to an end face of the cell, the protection board assembly is disposed on a surface of the flat portion away from the cell, and a thickness direction of the protection board assembly is in a height direction of the cell. Optionally, the tab includes a second bent portion and a connecting portion, the conductive sheet is formed with a U-shaped groove, and the connecting portion is disposed in the U-shaped groove; and the protective adhesive is disposed at the position corresponding to the second bent portion. Optionally, the head tape includes a cell connecting portion connected to the cell, and an end of the protective adhesive in a height direction of the cell extends to a first boundary of the cell connecting portion on a side close to the protective adhesive, or is spaced apart from the first boundary. Optionally, the head tape includes a top-surface connecting portion connected to a top surface of the protection board assembly, and an end of the protective adhesive in a height direction of the cell extends to a second boundary of the top-surface connecting portion on a side close to the protective adhesive, or is spaced apart from the second boundary. Optionally, the protective adhesive is disposed on an inner side of the head tape. Optionally, the protective adhesive has a length equal to or less than a length of the head tape in a direction parallel to a width of the cell. Optionally, a first double-sided adhesive is provided between the protection board assembly and the cell, at least two conductive sheets are provided, a first flexible cushioning member is provided in a gap between any two of the conductive sheets, one side of the first flexible cushioning member is connected to the first double-sided adhesive, a second double-sided adhesive is provided on the other side of the first flexible cushioning member, and the second double-sided adhesive is connected to the protection board assembly. Optionally, the first flexible cushioning member has a same thickness as the conductive sheet. Optionally, the first flexible cushioning member has a greater thickness than the conductive sheet. Optionally, the protection board assembly includes a protection board and a flexible printed circuit board, the flexible printed circuit board including a first end and a second end that are spaced apart by a preset distance; and the battery further includes: a fixing adhesive connected to a side surface of each of the first end and the second end that is away from the protection board. Optionally, th