Search

CN-224232663-U - Battery monomer, battery device and electric equipment

CN224232663UCN 224232663 UCN224232663 UCN 224232663UCN-224232663-U

Abstract

The application relates to a battery unit, a battery device and electric equipment, wherein the battery unit comprises a shell, an electrode assembly and an insulating piece, wherein the shell comprises a first wall part and a second wall part which are enclosed together to form a containing cavity, the first wall part is arranged corresponding to a heat exchange piece so as to exchange heat through the heat exchange piece, the electrode assembly is arranged in the containing cavity, the insulating piece is coated on the periphery of the electrode assembly and comprises a first covering surface and a second covering surface which are respectively covered on different surfaces of the electrode assembly, the first covering surface is arranged corresponding to the first wall part, and the thickness of the first covering surface is different from the thickness of the second covering surface. According to the application, the insulating part is coated on the periphery of the electrode assembly, the thickness of the insulating part is unequal from the first covering surface to the second covering surface, the first covering surface can be matched with the heat exchange part arranged on the first wall part, the heat conduction efficiency of the surface of the electrode assembly corresponding to the first covering surface is improved, the directional heat conduction of the battery cell is realized, and the service performance of the battery cell is improved.

Inventors

  • YIN QISHENG
  • CHEN WEI
  • Wu Canlong
  • Pei hang
  • SU HANG

Assignees

  • 宁德时代新能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250321

Claims (17)

  1. 1. A battery cell, comprising: The shell comprises a first wall part and a second wall part which are enclosed together to form a containing cavity, and the first wall part is arranged corresponding to the heat exchange piece so as to exchange heat through the heat exchange piece; An electrode assembly disposed in the accommodation chamber, and The insulating part is coated on the periphery of the electrode assembly and comprises a first covering surface and a second covering surface which are respectively covered on different surfaces of the electrode assembly, the first covering surface and the first wall part are correspondingly arranged, and the thickness of the first covering surface is different from that of the second covering surface.
  2. 2. The battery cell of claim 1, wherein the first cover surface includes at least one and corresponds one-to-one to the first wall portion, the second cover surface being a cover surface other than the first cover surface, the first cover surface having a thickness less than a thickness of the second cover surface.
  3. 3. The battery cell according to claim 2, wherein the electrode assembly has two large faces, two side faces connecting the two large faces, and one bottom face connecting the two large faces and the two side faces, wherein the large faces are surfaces of the electrode assembly having the largest area; The first cover surface overlies at least one major face of the electrode assembly.
  4. 4. The battery cell according to claim 2, wherein the electrode assembly has two large faces, two side faces connecting the two large faces, and one bottom face connecting the two large faces and the two side faces, wherein the large faces are surfaces of the electrode assembly having the largest area; the first cover surface covers at least one side of the electrode assembly.
  5. 5. The battery cell according to claim 2, wherein the electrode assembly has two large faces, two side faces connecting the two large faces, and one bottom face connecting the two large faces and the two side faces, wherein the large faces are surfaces of the electrode assembly having the largest area; The first cover surface covers the bottom surface of the electrode assembly.
  6. 6. The battery cell of claim 5, further comprising a support disposed between the first cover surface and the bottom surface of the housing.
  7. 7. The battery cell according to claim 2, wherein the electrode assembly has two large faces, two side faces connecting the two large faces, and one bottom face connecting the two large faces and the two side faces, wherein the large faces are surfaces of the electrode assembly having the largest area; The first cover surface covers at least two of a large surface, a side surface, and a bottom surface of the electrode assembly.
  8. 8. The battery cell of claim 2, wherein the thickness of the first cover surface is 1% -90% of the thickness of the second cover surface.
  9. 9. The battery cell of claim 8, wherein the thickness of the first cover surface is 5% -50% of the thickness of the second cover surface.
  10. 10. The battery cell according to claim 1, wherein the electrode assembly has two large faces, two side faces connecting the two large faces, and one bottom face connecting the two large faces and the two side faces, wherein the large faces are surfaces of the electrode assembly having the largest area; The first cover surface covers the bottom surface of the electrode assembly, the thickness of the first cover surface is larger than that of the second cover surface, and the first cover surface is in direct contact with the bottom surface of the shell.
  11. 11. The battery cell of claim 1, wherein the material of the insulator comprises a plastic material and a high thermal conductivity material.
  12. 12. The battery cell of claim 11, wherein the first cover has a thermal conductivity greater than the second cover.
  13. 13. The battery cell of claim 11, wherein the plastic material comprises one or more of polypropylene, polyphenylene sulfide, polyethylene, polyamide, polyvinyl chloride.
  14. 14. The battery cell of claim 11, wherein the high thermal conductivity material comprises one or more of boron nitride, gallium nitride, aluminum nitride, silicon carbide, aluminum oxide, beryllium oxide, silicon dioxide, magnesium oxide.
  15. 15. The battery cell of claim 11, wherein the insulating member has a thermal conductivity in the range of 0.05W/mk to 400W/mk.
  16. 16. A battery device comprising a battery cell according to any one of claims 1-15.
  17. 17. A powered device comprising the battery apparatus of claim 16.

Description

Battery monomer, battery device and electric equipment Technical Field The application relates to the technical field of batteries, in particular to a battery monomer, a battery device and electric equipment. Background With the development of new energy technology, the performance requirements on the battery device are higher and higher, the charging speed and the using power are higher, and the heat conduction of the battery device is more challenging. Based on the above, the current battery device has poor heat conduction performance, which is unfavorable for improving the overall performance of the battery device. Disclosure of utility model Based on this, it is necessary to provide a battery cell, a battery device and electric equipment aiming at the problem of poor heat conduction performance of the current battery device. The application provides a battery cell, which comprises a shell, an electrode assembly and an insulating part, wherein the shell comprises a first wall part and a second wall part which are enclosed together to form a containing cavity, the first wall part is arranged corresponding to a heat exchange part so as to exchange heat through the heat exchange part, the electrode assembly is arranged in the containing cavity, the insulating part is coated on the periphery of the electrode assembly and comprises a first covering surface and a second covering surface which are respectively covered on different surfaces of the electrode assembly, the first covering surface is arranged corresponding to the first wall part, and the thickness of the first covering surface is different from that of the second covering surface. Through the structure, the first covering surface and the second covering surface of the insulating part are set to be different in thickness and respectively cover different surfaces of the electrode assembly, wherein the first covering surface can be matched with the heat exchange part arranged on the first wall part, the heat conduction efficiency of the surface of the electrode assembly corresponding to the first covering surface is improved, the directional heat conduction of the battery is realized, and therefore the service performance of the battery is improved. In some embodiments, the first cover surface includes at least one and corresponds one-to-one with the first wall portion, and the second cover surface is a cover surface other than the first cover surface, and the thickness of the first cover surface is smaller than the thickness of the second cover surface. Therefore, the thickness of the first covering surface is thinner, heat transfer is more facilitated, heat can be better transferred through cooperation with the heat exchange piece, the effect of directional heat conduction of the battery cell is achieved, and the heat conduction efficiency of the battery cell is improved. In some embodiments, the electrode assembly has two large faces, two side faces connecting the two large faces, and one bottom face connecting the two large faces and the two side faces, wherein the large faces are the surfaces with the largest area of the electrode assembly, and the first covering face covers at least one large face of the electrode assembly. Through the structure, the large-surface heat conduction of the electrode assembly can be realized through the first coverage surface, and the heat exchange structure is suitable for a battery device in which a heat exchange structure and a large-surface of a battery cell are arranged correspondingly. In some embodiments, the electrode assembly has two large faces, two side faces connecting the two large faces, and one bottom face connecting the two large faces and the two side faces, wherein the large faces are the surfaces with the largest area of the electrode assembly, and the first covering face covers at least one side face of the electrode assembly. Through the structure, the side heat conduction of the electrode assembly can be realized through the first coverage surface, and the heat exchange structure is applicable to a battery device with a heat exchange structure arranged corresponding to the side surface of the battery cell. In some embodiments, the electrode assembly has two large faces, two side faces connecting the two large faces, and one bottom face connecting the two large faces and the two side faces, wherein the large faces are the surfaces with the largest area of the electrode assembly, and the first covering face covers the bottom face of the electrode assembly. Through the structure, the heat conduction of the bottom surface of the electrode assembly can be realized through the first coverage surface, and the heat exchange structure is applicable to a battery device with a heat exchange structure and a battery monomer bottom surface arranged correspondingly. In some embodiments, the battery cell further comprises a support disposed between the first cover surface and the bottom surface of the housing.