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CN-224232745-U - Single battery, battery pack and electric equipment

CN224232745UCN 224232745 UCN224232745 UCN 224232745UCN-224232745-U

Abstract

The application discloses a single battery, a battery pack and electric equipment, and belongs to the technical field of power batteries; the electrode assembly is arranged in the accommodating cavity and provided with a first direction, the insulating film is sleeved on the periphery of the electrode assembly in a circle and partially overlapped and connected, the insulating film is positioned between the electrode assembly and the shell, the side plate is arranged on the overlapped and connected part of the insulating film along the first direction and integrally formed with the insulating film, and the cover plate assembly is arranged at two ends of the shell and covers the accommodating cavity and is connected with the shell. The application integrates the side plate and the insulating film, and reduces the steps of assembling the side plate and the insulating film. By partially overlapping the insulating films, after the insulating films are coated on the outer periphery of the electrode assembly, the insulating films do not need to be fixed by using adhesive tapes, and the step of coating the insulating films is further reduced.

Inventors

  • WANG LIJUAN

Assignees

  • 蜂巢能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250411

Claims (10)

  1. 1. A single cell, characterized by comprising: A housing (10) having a receiving cavity; An electrode assembly (20) disposed within the receiving chamber, the electrode assembly (20) having a first direction (X); an insulating film (30) which is sleeved on the periphery of the electrode assembly (20) in a circle and is partially overlapped and connected, and the insulating film (30) is positioned between the electrode assembly (20) and the shell (10); a side plate (40) provided at a portion where the insulating films (30) overlap each other in the first direction (X), the side plate (40) being integrally formed with the insulating films (30); and the cover plate assemblies (50) are arranged at two ends of the shell (10) and cover the accommodating cavity to be connected with the shell (10).
  2. 2. The single cell according to claim 1, wherein the insulating film (30) comprises a first overlap region (31), a first film body (32), a second film body (33), a third film body (34), a second overlap region (35) and a first adhesive layer (36) disposed on the second overlap region (35) which are sequentially connected; The first overlapping region (31) has a first face (311) and a second face (312) which are oppositely arranged, the side plate (40) is attached to the first face (311), and the second face (312) is attached to the electrode assembly (20); The first membrane body (32), the second membrane body (33) and the third membrane body (34) are attached to the electrode assembly (20); The second overlapping area (35) is provided with a third surface (351), the first adhesive layer (36) is attached to the third surface (351), and the first adhesive layer (36) is attached to one side, away from the first surface (311), of the side plate (40).
  3. 3. The single battery according to claim 2, wherein the side plate (40) is provided with a first plate surface (41) and a second plate surface (44) which are oppositely arranged, a second adhesive layer (42) is arranged on one side of the first plate surface (41) facing the first surface (311), the second adhesive layer (42) is attached to the first surface (311), and the second plate surface (44) is attached to the first adhesive layer (36).
  4. 4. A unit cell according to claim 3, wherein said insulating film (30) has two first positioning holes (37) penetrating in the thickness direction thereof, said first positioning holes (37) being located in said first overlap region (31).
  5. 5. The single battery according to claim 4, wherein the side plate (40) further comprises two positioning posts (43), and the positioning posts (43) are disposed on the first plate surface (41) and pass through the first positioning holes (37).
  6. 6. The unit cell according to claim 4, characterized in that in the first direction (X), the minimum distance between one of the first positioning holes (37) and the edge of the first overlap region (31) is L 1 mm, which satisfies 53 mm-L 1 -63 mm, and the minimum distance between the other of the first positioning holes (37) and the edge of the first overlap region (31) is L 2 mm, which satisfies 53 mm-L 2 -63 mm.
  7. 7. A unit cell according to claim 3, wherein said insulating film (30) has two second positioning holes (38) penetrating in the thickness direction thereof, said second positioning holes (38) being located in said second overlap region (35).
  8. 8. The unit cell according to claim 7, characterized in that in the first direction (X), the minimum distance between one of the second positioning holes (38) and the edge of the first overlap region (31) is L 3 mm, which satisfies 33mm +.L 3 +.43mm, and the minimum distance between the other of the second positioning holes (38) and the edge of the first overlap region (31) is L 4 mm, which satisfies 33mm +.L 4 +.43mm.
  9. 9. A battery pack comprising the single cell according to any one of claims 1 to 8.
  10. 10. A powered device comprising a single cell as claimed in any one of claims 1 to 8 or comprising a battery pack as claimed in claim 9.

Description

Single battery, battery pack and electric equipment Technical Field The application belongs to the technical field of power batteries, and particularly relates to a single battery, a battery pack and electric equipment. Background At present, in the production of lithium ion batteries, a side edge of an insulating film is required to be folded by sticking an adhesive tape, a long-blade battery core side edge overlapping folding area is only folded by sticking the adhesive tape, the insulating film in the middle of an adhesive tape interval is not stressed and is easy to wave and uneven, the uneven overlapping area of the insulating film can seriously influence the battery core to enter a shell, the influence on the entering of the shell is extremely easy to happen because the side edge of the insulating film is stuck with a redundant bulge, the insulating film is seriously possibly damaged, and a side plate of the battery core is required to be fused together with the insulating film in a hot-melting way, so that the bulge and the hot-melting penetration abnormality easily exist. Disclosure of utility model The embodiment of the application provides a single battery, which aims to solve the technical problem of complicated steps of wrapping an insulating film at present, and another object of the embodiment of the application is to provide a battery pack, and still another object of the embodiment of the application is to provide electric equipment. An embodiment of the present application provides a unit cell including: A housing having a receiving cavity; An electrode assembly disposed in the receiving chamber, the electrode assembly having a first direction; The insulating film is sleeved on the periphery of the electrode assembly in a circle and is partially connected in an overlapping manner, and the insulating film is positioned between the electrode assembly and the shell; a side plate which is arranged at the overlapped connection part of the insulating film along the first direction and is integrally formed with the insulating film; the cover plate components are arranged at two ends of the shell and are connected with the shell by the cover seal accommodating cavity. In some embodiments of the present invention, in some embodiments, The insulation film comprises a first overlapping region, a first film body, a second film body, a third film body, a second overlapping region and a first adhesive layer arranged on the second overlapping region which are sequentially connected; The first overlapping area is provided with a first surface and a second surface which are oppositely arranged, the side plate is attached to the first surface, and the second surface is attached to the electrode assembly; the first membrane body, the second membrane body and the third membrane body are attached to the electrode assembly; The second overlapping area is provided with a third surface, the first adhesive layer is attached to the third surface, and the first adhesive layer is attached to one side, away from the first surface, of the side plate. In some embodiments, the side plate is provided with a first plate surface and a second plate surface which are oppositely arranged, a second adhesive layer is arranged on one side of the first plate surface facing the first surface, the second adhesive layer is attached to the first surface, and the second plate surface is attached to the first adhesive layer. In some embodiments, the insulating film has two first positioning holes penetrating in a thickness direction thereof, and the first positioning holes are located in the first overlapping region. In some embodiments, the side plate further includes two positioning columns, where the positioning columns are disposed on the first plate surface and pass through the first positioning holes. In some embodiments, in the first direction, a minimum distance between one of the first positioning holes and the edge of the first overlapping region is L 1 mm, which is 53mm less than or equal to L 1 less than or equal to 63mm, and a minimum distance between the other of the first positioning holes and the edge of the first overlapping region is L 2 mm, which is 53mm less than or equal to L 2 less than or equal to 63mm. In some embodiments, the insulating film has two second positioning holes penetrating in a thickness direction thereof, and the second positioning holes are located in the second overlapping region. In some embodiments, in the first direction, a minimum distance between one of the second positioning holes and the edge of the first overlapping region is L 3 mm, which is 33mm less than or equal to L 3 less than or equal to 43mm, and a minimum distance between the other of the second positioning holes and the edge of the first overlapping region is L 4 mm, which is 33mm less than or equal to L 4 less than or equal to 43mm. The embodiment of the application also discloses a battery pack which comprises the single batter