Search

CN-122000648-A - Insulation structure, battery cell and battery device

CN122000648ACN 122000648 ACN122000648 ACN 122000648ACN-122000648-A

Abstract

The invention discloses an insulating structure, a battery cell and a battery device, wherein the insulating structure is used for the battery cell, the battery cell comprises a shell and a battery core arranged in the shell, and the insulating structure comprises: the battery cell comprises an insulating film and a supporting body, wherein the insulating film is configured to be suitable for wrapping the battery cell, the supporting body and the insulating film are integrally formed, and the supporting body is suitable for being supported at the bottom of the battery cell. According to the insulating structure, the support body and the insulating film are integrally formed, so that the production process of the battery cell can be simplified, the assembly efficiency is improved, the battery cell is wrapped by the insulating film and stably supported by the support body, the direct contact between the battery cell and the shell can be avoided, the electrochemical corrosion of the shell and the friction damage of the battery cell are reduced, and the safety of the battery cell is ensured.

Inventors

  • CHEN HAIQUAN
  • LI SHUGUO

Assignees

  • 湖北亿纬动力有限公司

Dates

Publication Date
20260508
Application Date
20260128

Claims (15)

  1. 1. An insulation structure (100) is used for a battery cell, and the battery cell comprises a shell and a battery cell arranged in the shell, and is characterized in that the insulation structure (100) comprises an insulation film (20) and a support body (10), the insulation film (20) is configured to be suitable for wrapping the battery cell, the support body (10) and the insulation film (20) are integrally formed, and the support body (10) is suitable for being supported at the bottom of the battery cell.
  2. 2. The insulating structure (100) according to claim 1, wherein the support body (10) is rectangular plate body-shaped, the insulating film (20) has a first film segment (21) and a second film segment (22) that extend beyond the support body (10) in a width direction of the support body (10), the first film segment (21) and the second film segment (22) are respectively arranged on both sides in the width direction of the support body (10), and the first film segment (21) and the second film segment (22) are configured to cover at least both side surfaces of the battery cell in a thickness direction.
  3. 3. The insulation structure (100) according to claim 2, wherein, in the length direction of the support body (10), both side edges of the support body (10) respectively exceed both side edges of the first film section (21) and the second film section (22), the first film section (21) and the second film section (22) are adapted to cover both side surfaces of the battery cell in the thickness direction respectively, or, In the length direction of the support body (10), the two side edges of the first film section (21) and the second film section (22) respectively exceed the two side edges of the support body (10), and the parts of the first film section (21) and the second film section (22) which exceed the support body (10) are suitable for covering the two side surfaces of the battery cell in the length direction.
  4. 4. The insulation structure (100) according to claim 2, wherein the support body (10) is in the shape of a hollow plate body, a hollow cavity (11) is defined on the inner side of the support body (10), the support body (10) is provided with a first wall (12) and a second wall (13) which are oppositely arranged in the thickness direction, the first wall (12) is provided with a first via hole (121) communicated with the hollow cavity (11), and the second wall (13) is provided with a second via hole (131) communicated with the hollow cavity (11).
  5. 5. The insulating structure (100) according to claim 4, wherein the equivalent diameter of the first via (121) and the second via (131) is 0.2mm-0.5mm.
  6. 6. The insulating structure (100) according to claim 4, wherein the first via hole (121) and the second via hole (131) are arranged offset in a longitudinal direction of the support body (10).
  7. 7. The insulating structure (100) according to claim 6, wherein the number of the first via holes (121) is plural, the plurality of first via holes (121) constitute a plurality of first hole groups (122), each first hole group (122) including the plurality of first via holes (121) arranged at intervals in the width direction of the support body (10), the plurality of first hole groups (122) being arranged at intervals in the length direction of the support body (10); The number of the second through holes (131) is multiple, the second through holes (131) form a plurality of second hole groups (132), each second hole group (132) comprises a plurality of second through holes (131) which are distributed at intervals along the width direction of the support body (10), and the second hole groups (132) are distributed at intervals along the length direction of the support body (10).
  8. 8. The insulation structure (100) according to claim 6, wherein a rib (111) is further disposed in the cavity (11), and the rib (111) is disposed between the adjacent first via hole (121) and the second via hole (131) in the length direction of the support body (10).
  9. 9. The insulation structure (100) according to claim 8, wherein one end of the rib (111) is connected to one of the first wall (12) and the second wall (13) in the thickness direction of the support body (10), and the other end of the rib (111) is spaced apart from the other of the first wall (12) and the second wall (13).
  10. 10. The insulation structure (100) according to claim 8, wherein the number of ribs (111) is plural, the plurality of ribs (111) comprising a first rib (1111) and a second rib (1112), the first rib (1111) being connected to the first wall (12) and extending towards the second wall (13), the second rib (1112) being connected to the second wall (13) and extending towards the first wall (12), Wherein, adjacent first via hole (121) with be equipped with between second via hole (131) first protruding muscle (1111) with second protruding muscle (1112), first protruding muscle (1111) with second protruding muscle (1112) are in interval arrangement on the length direction of support body (10), first protruding muscle (1111) are close to first via hole (121) setting, second protruding muscle (1112) are close to second via hole (131) setting.
  11. 11. The insulation structure (100) according to claim 10, wherein a side edge of the first bead (1111) facing the second wall (13) exceeds a side edge of the second bead (1112) facing the first wall (12) in a thickness direction of the support body (10).
  12. 12. Insulation structure (100) according to claim 8, characterized in that the width of the ribs (111) in the thickness direction of the support body (10) is 0.5-0.8 mm, and/or that the length of the ribs (111) in the width direction of the support body (10) is 60-70 mm, and/or that the thickness of the ribs (111) in the length direction of the support body (10) is 0.2-0.3 mm.
  13. 13. Insulation structure (100) according to any of claims 1-12, characterized in that the thickness of the support (10) is 0.8-1.5 mm and/or the thickness of the insulation film (20) is 0.2-0.3 mm.
  14. 14. A battery cell, comprising: A housing defining a receiving cavity; the battery cell is arranged in the accommodating cavity; the insulation structure (100) according to any one of claims 1-13, the insulation structure (100) being arranged in the accommodation cavity, the insulation film (20) being wrapped outside the battery cell, the support body (10) being arranged between the battery cell and the bottom wall of the accommodation cavity.
  15. 15. A battery device comprising the battery cell according to claim 14.

Description

Insulation structure, battery cell and battery device Technical Field The invention relates to the technical field of batteries, in particular to an insulating structure, a battery cell and a battery device. Background Sustainable energy occupies an important role in the current society, and lithium ion batteries are widely applied to aspects of social production and life as core products in the field of novel energy. Therefore, cycle life and safety of lithium ion batteries become important reference indicators. At present, one of the existing measures for guaranteeing the safety of the battery is to use an insulating film and a bottom bracket to protect a core pack of the battery. The insulating film can prevent the core pack from directly contacting with the aluminum shell of the battery, prevent the shell from corroding or the core pack from being short-circuited due to electrochemical action, and the bottom support piece can support the battery core, buffer the damage of external impact and vibration to the battery core, reduce the safety risk of the battery core caused by stress deformation, and further improve the safety and the service life of the battery. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides an insulating structure which can simplify the production process of the battery cell, improve the assembly efficiency, reduce the electrochemical corrosion of the shell and ensure the safety of the battery cell. The invention also provides a battery cell with the insulating structure. The invention also provides a battery device with the battery cell. According to the insulation structure of the first aspect of the invention, the battery unit comprises a shell and a battery cell arranged in the shell, the insulation structure comprises an insulation film and a support body, the insulation film is configured to be suitable for wrapping the battery cell, the support body and the insulation film are integrally formed, and the support body is suitable for being supported at the bottom of the battery cell. According to the insulating structure, the supporting body and the insulating film are integrally formed, so that the production process of the battery cell is simplified, the assembly efficiency is improved, meanwhile, the direct contact between the battery cell and the shell is avoided, the electrochemical corrosion of the shell and the friction damage of the battery cell are reduced, and the safety of the battery cell is ensured. In some embodiments, the support body is in the shape of a rectangular plate body, the insulating film has a first film segment and a second film segment that extend beyond the support body in a width direction of the support body, the first film segment and the second film segment are respectively arranged on both sides of the support body in the width direction, and the first film segment and the second film segment are configured to cover at least both side surfaces of the battery cell in a thickness direction. In some embodiments, the two side edges of the support body exceed the two side edges of the first film section and the second film section respectively in the length direction of the support body, the first film section and the second film section are suitable for covering the two side surfaces of the battery cell in the thickness direction respectively, or the two side edges of the first film section and the second film section exceed the two side edges of the support body respectively in the length direction of the support body, and the parts of the first film section and the second film section exceeding the support body are suitable for covering the two side surfaces of the battery cell in the length direction. In some embodiments, the support body is in the shape of a hollow plate body, the inner side of the support body defines a cavity, the support body is provided with a first wall and a second wall which are oppositely arranged in the thickness direction, the first wall is provided with a first via hole communicated with the cavity, and the second wall is provided with a second via hole communicated with the cavity. In some embodiments, the equivalent diameter of the first via and the second via is 0.2mm-0.5mm. In some embodiments, the first via and the second via are staggered in a length direction of the support. In some embodiments, the number of the first through holes is a plurality, the first through holes form a plurality of first hole groups, each first hole group comprises a plurality of first through holes which are arranged at intervals along the width direction of the support body, the first hole groups are arranged at intervals along the length direction of the support body, the second through holes are a plurality, the first through holes form a plurality of second hole groups, each second hole group comprises a plurality of secon