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CN-224217682-U - Battery cell, battery pack and electricity utilization device

CN224217682UCN 224217682 UCN224217682 UCN 224217682UCN-224217682-U

Abstract

The embodiment of the application provides a battery cell, a battery pack and an electricity utilization device. The battery cell comprises a battery cell body and a tab group, wherein the tab group is connected with the battery cell body and extends outwards from the battery cell body, the tab group comprises at least two tabs which are arranged in a stacked mode along the first direction, each tab comprises a first section, a middle section and a second section which are connected in sequence, the first section is connected with the battery cell body, and the middle sections of the adjacent tabs are bonded through an insulating adhesive layer. In the embodiment of the application, the middle sections of the adjacent two layers of lugs are connected together through the insulating adhesive layer, so that the middle sections of the adjacent lugs are mutually restrained, the strength of the middle sections of the lugs is improved, the deformation of the middle areas of the lugs is reduced, the problem of lug interpolation is further reduced, and the safety of the battery is improved.

Inventors

  • LAI JIANXIN
  • ZHANG LIJING
  • LIU QIAN
  • Rao Caitang
  • YU WENJUN

Assignees

  • 欣旺达动力科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250516

Claims (10)

  1. 1. A cell having a first direction (X), comprising: a cell body (10); and utmost point ear group (20), utmost point ear group (20) with electric core body (10) link to each other and follow electric core body (10) outwards stretch out, utmost point ear group (20) are including two at least edges utmost point ear (201) of range upon range of setting of first direction (X), utmost point ear (201) are including first section (2011), first interlude (2012) and second section (2013) that link to each other in proper order, first section (2011) connect in electric core body (10), adjacent first interlude (2012) of utmost point ear (201) are through insulating glue film (60) bonding.
  2. 2. The cell of claim 1, wherein the insulating glue layer (60) is a plurality, each insulating glue layer (60) being disposed between the first intermediate sections (2012) of two adjacent tabs (201).
  3. 3. The cell of claim 2, wherein the tab set (20) is a plurality, and the number of tabs (201) of at least two tab sets (20) is different.
  4. 4. A cell according to claim 3, characterized in that the number of tabs (201) of the tab group (20) located at the edge of the cell body (10) is greater than the number of tabs (201) of the tab group (20) located in the middle region of the cell body (10).
  5. 5. A cell according to claim 2, further having a second direction (Y) intersecting the first direction (X); the battery cell further comprises a connecting sheet (30), and the connecting sheet (30) and the battery cell body (10) are arranged at intervals along the second direction (Y); Among the plurality of tab groups (20), one part of the tab groups (20) are arranged on one side of the battery cell body (10) along the first direction (X) to form an anode tab assembly (21), and the other part of the tab groups (20) are arranged on the other side of the battery cell body (10) along the first direction (X) to form a cathode tab assembly (22); The anode tab assembly (21) and the cathode tab assembly (22) are positioned between the cell body (10) and the connecting sheet (30), the anode tab assembly (21) comprises a third section (211), a second middle section (212) and a fourth section (213) which are sequentially connected, and the third section (211) is connected with the cell body (10); The cathode tab assembly (22) comprises a fifth section (221), a third middle section (222) and a sixth section (223) which are sequentially connected, and the fifth section (221) is connected to the battery cell body (10); The fourth section (213) of the anode tab assembly (21) and the sixth section (223) of the cathode tab assembly (22) are both connected to the connecting piece (30).
  6. 6. The cell of claim 5, further comprising a protective sheet (40); The protection sheet (40) is connected to one side of the fourth section (213) of the anode tab assembly (21) and the sixth section (223) of the cathode tab assembly (22), which is far away from the connection sheet (30).
  7. 7. The cell according to claim 6, characterized in that the protective sheet (40) is arranged at intervals along the second direction (Y) from the middle area of the cell body (10); The anode tab assembly (21) is bent towards the protection sheet (40) along the first direction (X), and the cathode tab assembly (22) is bent towards the protection sheet (40) along the first direction (X).
  8. 8. The cell of claim 4, wherein the cell body (10) comprises an anode conductive layer, a cathode conductive layer, and a separator layer disposed between the anode conductive layer and the cathode conductive layer; The anode tab assembly (21) is connected with the anode conductive layer, and the cathode tab assembly (22) is connected with the cathode conductive layer.
  9. 9. A battery pack comprising the cell according to any one of claims 1 to 8.
  10. 10. An electrical device comprising the battery pack of claim 9, or the cell of any one of claims 1-8.

Description

Battery cell, battery pack and electricity utilization device Technical Field The application belongs to the technical field of batteries, and particularly relates to a battery cell, a battery pack and an electric device. Background The lithium ion battery is used as a new energy source, has the advantages of high energy density, long cycle life and the like, and is widely applied to various fields of electric automobiles, energy storage and the like. In the related art, a battery cell of a lithium ion battery generally includes a battery cell body and a plurality of layers of tabs connected to the battery cell body, and the battery cell body has higher power and energy due to the arrangement of the plurality of layers of tabs. However, the thickness of the tab is thin, so that the multilayer tab is easy to deform and is inserted into the battery core body, thereby causing safety risks such as short circuit and the like and reducing the safety of the battery. Disclosure of utility model The application aims to provide a battery cell, a battery pack and an electricity utilization device, so as to solve the problems that the safety risks such as short circuit and the like are caused by the fact that the existing tab is easy to insert into a battery cell body, and the safety of a battery is reduced. In order to solve the technical problems, the application is realized as follows: in a first aspect, the application discloses a cell having a first direction, comprising: A cell body; And the tab group is connected with the battery cell body and extends outwards from the battery cell body, the tab group comprises at least two tabs which are arranged in a stacked manner along the first direction, each tab comprises a first section, a first middle section and a second section which are sequentially connected, the first sections are connected with the battery cell body, and the adjacent first middle sections of the tabs are bonded through an insulating adhesive layer. Optionally, the insulating glue layer is a plurality of, and each insulating glue layer is arranged between the first intermediate sections of two adjacent tabs. Optionally, the tab group is a plurality of tab groups, and the tab numbers of at least two tab groups are different. Optionally, the number of tabs of the tab group located at the edge of the battery cell body is greater than the number of tabs of the tab group located in the middle area of the battery cell body. Optionally, a second direction intersecting the first direction, The battery cell further comprises a connecting sheet, and the connecting sheet and the battery cell body are arranged at intervals along the second direction; In the plurality of tab groups, one part of the tab groups are arranged on one side of the battery cell body along the first direction to form an anode tab assembly, and the other part of the tab groups are arranged on the other side of the battery cell body along the first direction to form a cathode tab assembly; The anode tab assembly and the cathode tab assembly are positioned between the battery cell body and the connecting sheet, the anode tab assembly comprises a third section, a second middle section and a fourth section which are sequentially connected, and the third section is connected with the battery cell body; The cathode tab assembly comprises a fifth section, a third middle section and a sixth section which are sequentially connected, and the fifth section is connected with the battery cell body; the fourth section of the anode tab assembly and the sixth section of the cathode tab assembly are both connected with the connecting piece. Optionally, the battery cell further comprises a protection sheet; The protection sheet is connected to one side, far away from the connecting sheet, of the fourth section of the anode tab assembly and the sixth section of the cathode tab assembly. Optionally, the protection sheet and the middle area of the battery cell body are arranged at intervals along the second direction; The anode tab assembly is bent toward the protection sheet along the first direction, and the cathode tab assembly is bent toward the protection sheet along the first direction. Optionally, the cell body comprises an anode conductive layer, a cathode conductive layer and a diaphragm layer arranged between the anode conductive layer and the cathode conductive layer, wherein the anode conductive layer, the cathode conductive layer and the diaphragm layer are wound; The anode tab assembly is connected with the anode conductive layer, and the cathode tab assembly is connected with the cathode conductive layer. In a second aspect, the application also discloses a battery pack, which comprises the battery cell of any one of the above. In a third aspect, the application also discloses an electric device, which comprises the battery pack or any one of the battery cores. In the embodiment of the application, the battery core comprises the battery core b