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CN-224232744-U - Battery case and battery

CN224232744UCN 224232744 UCN224232744 UCN 224232744UCN-224232744-U

Abstract

The utility model relates to the technical field of batteries, and particularly discloses a battery shell and a battery. The battery shell comprises a shell body, a top cover, an insulating sheet and a blue film, wherein the top cover is arranged at the top end of the shell body, the top end of the top cover is provided with an outer Zhou Huancao, a peripheral annular groove extends to the end face of the top cover, the blue film is coated on the outer side wall of the shell body, the top end of the blue film is bent to form a plurality of bending parts, all the bending parts are arranged in the outer Zhou Huancao, the insulating sheet is arranged at the top end of the top cover, and the bottom end of the insulating sheet is adhered to the top cover. The battery shell solves the problems of the coating of the blue film and the bonding effect of the insulating sheet through the improvement of the specific structures of the top cover and the blue film, and improves the tightness, the structural integrity and the connection stability of the components of the battery shell.

Inventors

  • HAN BO
  • CHEN KAI
  • LI ZHENG
  • FENG YUCHUAN

Assignees

  • 苏州清陶新能源科技有限公司

Dates

Publication Date
20260512
Application Date
20250513

Claims (11)

  1. 1. The battery shell is characterized by comprising a shell body (300), a top cover (100), an insulating sheet (400) and a blue film (200), wherein the top cover (100) is covered on the top end of the shell body (300), a peripheral annular groove (101) is formed in the top end of the top cover (100), the outer Zhou Huancao (101) extends to the end face of the top cover (100), the blue film (200) is wrapped on the outer side wall of the shell body (300), a plurality of bending parts are bent at the top end of the blue film (200), all the bending parts are arranged in the outer Zhou Huancao (101), the insulating sheet (400) is arranged on the top end of the top cover (100), and the bottom end of the insulating sheet (400) is adhered to the top cover (100).
  2. 2. The battery case according to claim 1, wherein the groove width of the outer Zhou Huancao (101) is D1, and the thickness of the top cover (100) is D3,0.15D3< D1<0.20D3.
  3. 3. The battery case according to claim 1, wherein the groove width of the outer Zhou Huancao (101) is D1, and the groove depth of the outer Zhou Huancao (101) is D4,0.05D1< D4<0.10D1.
  4. 4. The battery case according to claim 1, wherein a bottom end edge of the top cover (100) is welded to a top end of the case (300).
  5. 5. The battery case according to claim 4, wherein a welding ring groove (1011) is concavely provided in a side wall of the outer Zhou Huancao (101).
  6. 6. The battery case according to claim 1, wherein the bent portion has a shape of an isosceles trapezoid, and a width of the bent portion is gradually reduced in a direction from the case (300) to the top cover (100).
  7. 7. The battery case according to claim 6, wherein the shell (300) is a cuboid, the bending parts comprise two first bending parts (201) and two second bending parts (202) which are arranged in a staggered manner, gaps (203) are arranged between each two bending parts, and the bottom edge length of the first bending parts (201) is larger than that of the second bending parts (202).
  8. 8. The battery housing of claim 1, wherein a side of each of the bent portions is in contact with a side of an adjacent bent portion.
  9. 9. The battery case according to any one of claims 1 to 8, wherein all the bent portions do not overlap each other.
  10. 10. The battery case according to claim 9, wherein the groove width of the outer Zhou Huancao (101) is D1, and the thickness of the bent portion is D2, and D1 is equal to or greater than D2.
  11. 11. The battery is characterized by comprising an electric core (600) and the battery shell according to any one of claims 1-10, wherein the shell (300) and the top cover (100) enclose a containing cavity, and the electric core (600) is arranged in the containing cavity.

Description

Battery case and battery Technical Field The utility model relates to the technical field of batteries, in particular to a battery shell and a battery. Background The battery is one of three packaging forms of lithium ion batteries, and generally consists of a shell, a top cover and an electric core, wherein the electric core is arranged in the shell, and the top cover is arranged at the opening of the top end of the shell, so that the electric core is packaged in the shell. Because the shell is usually an aluminum shell, the shell has conductivity and is easy to be electrically connected with other metal structures to cause the problem of short circuit. To solve this problem, the prior art generally covers the outside of the case with an insulating blue film. In the prior art, when the battery is coated, the side wall and the bottom surface of the shell are generally coated, so that the top end of the blue film exceeds the top end of the side wall of the shell, and then the exceeding part is bent to coat the edge of the top cover, so that the edge of the top cover connected with the shell is well coated. However, the blue film only covers part of the top cover, and the top cover is covered by an insulating sheet to completely cover the top cover. But the blue film on the top cover has thickness difference with the surface of the top cover, which can influence the bonding effect of the insulating sheet on the top cover, so that the insulating sheet is easy to warp after being scratched. Disclosure of utility model The utility model aims to provide a battery shell and a battery, which can solve the problems of blue film coating and insulating sheet bonding effect and improve the tightness, structural integrity and component connection stability of the battery shell. To achieve the purpose, the utility model adopts the following technical scheme: The battery shell comprises a shell body, a top cover, an insulating sheet and a blue film, wherein the top cover is arranged at the top end of the shell body, an outer Zhou Huancao is arranged at the top end of the top cover, a peripheral ring groove extends to the end face of the top cover, the blue film is wrapped on the outer side wall of the shell body, a plurality of bending parts are bent at the top end of the blue film, all the bending parts are arranged in the outer Zhou Huancao, the insulating sheet is arranged at the top end of the top cover, and the bottom end of the insulating sheet is adhered to the top cover. As an alternative solution of the battery case, the groove width of the outer Zhou Huancao is D1, and the thickness of the top cover is D3,0.15d3< D1<0.20d3. As an alternative solution of the battery case, the groove width of the outer Zhou Huancao is D1, and the groove depth of the outer Zhou Huancao is D4,0.05D1< D4<0.10D1. As an alternative solution of the battery case, the bottom edge of the top cover is welded with the top end of the shell. As an alternative solution of the battery case, a welding ring groove is concavely provided on the side wall of the outer Zhou Huancao. As an alternative solution of the battery case, the shape of the bending part is isosceles trapezoid, and the width of the bending part gradually decreases along the direction from the case to the top cover. As an alternative technical scheme of the battery shell, the shell is cuboid, the bending parts comprise two first bending parts and two second bending parts which are arranged in a staggered mode, gaps are formed between every two bending parts, and the length of the bottom edge of each first bending part is larger than that of each second bending part. As an alternative technical scheme of the battery case, the side surface of each bending part is attached to the side surface of the adjacent bending part. As an alternative to the battery case, all the bent parts do not overlap each other. As an alternative technical scheme of the battery shell, the groove width of the outer Zhou Huancao is D1, and the thickness of the bending part is D2, wherein D1 is more than or equal to D2. The battery comprises a battery core and the battery shell, wherein the shell and the top cover enclose a containing cavity, and the battery core is arranged in the containing cavity. The utility model has the beneficial effects that: The battery shell consists of a shell, a top cover, an insulating sheet and a blue film, all the components are matched with each other, the structural design is reasonable, a complete structure is formed, and the internal elements of the battery are effectively protected. The top cover is arranged at the top end of the shell, the blue film is coated on the outer side wall of the shell, the insulating sheet is arranged at the top end of the top cover and is adhered to the top cover and the bending part, connection tightness among all parts is guaranteed, tightness and structural integrity of the battery shell are enhanced, and impurities such as external dust and