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CN-224217535-U - Battery case and cylindrical battery

CN224217535UCN 224217535 UCN224217535 UCN 224217535UCN-224217535-U

Abstract

The utility model belongs to the technical field of secondary batteries, and particularly relates to a battery shell and a cylindrical battery, wherein the cylindrical battery comprises a shell body, a battery shell and a battery shell, wherein the shell body is provided with a first installation cavity, the bottom of the first installation cavity is provided with a frustum, and the frustum is arranged along the axial direction of the shell body; the battery comprises a battery shell, a cylindrical battery, a phase change material, a heat dissipation part and the like, wherein the battery shell is provided with a first installation cavity, a cavity is arranged at the axis of the battery, the battery is arranged in the first installation cavity, the frustum is inserted into the cavity, a second installation cavity is arranged in the frustum, the second installation cavity is communicated with the lower surface of the shell body, the battery shell and the cylindrical battery are provided with the frustum, the frustum can be inserted into the cavity of the battery through the frustum, so that the heat conduction area is increased, the heat dissipation effect is improved, meanwhile, the phase change material or the heat dissipation part and the like can be arranged in the frustum, and the heat dissipation is faster, and the battery shell and the cylindrical battery are flexible in selection.

Inventors

  • XIAO PENG

Assignees

  • 江苏睿恩新能源科技有限公司

Dates

Publication Date
20260508
Application Date
20250421

Claims (10)

  1. 1. A cylindrical battery, comprising: The shell comprises a shell body (1), wherein a first installation cavity (11) is formed in the shell body, a frustum (2) is arranged at the bottom of the first installation cavity (11), and the frustum (2) is arranged along the axial direction of the shell body (1); a cavity (41) is arranged at the axis of the battery cell (4), wherein The battery cell (4) is arranged in the first installation cavity (11) and the frustum (2) is inserted into the cavity (41), and A second installation cavity (21) is formed in the frustum (2), and the second installation cavity (21) is communicated with the lower surface of the shell body (1).
  2. 2. The cylindrical battery according to claim 1, wherein, The second installation cavity (21) is filled with a phase change material (5); the phase change material (5) comprises graphene and alumina ceramic, wherein The ratio of the mass of the graphene to the mass of the alumina ceramic ranges from 1:99 to 99:1.
  3. 3. The cylindrical battery according to claim 1, wherein, The inner wall of the second installation cavity (21) is provided with a thread groove.
  4. 4. The cylindrical battery according to claim 1, wherein, The second installation cavity (21) is internally provided with a heat dissipation piece (3), wherein The heat dissipation element (3) is spiral or The side wall of the heat dissipation piece (3) is provided with threads, or The heat dissipation piece (3) is in a step shape or The heat dissipation piece (3) is in a cone shape.
  5. 5. The cylindrical battery according to claim 1, wherein, The diameter of the cavity (41) is R, the diameter of the bottom surface of the frustum (2) is R1, the diameter of the shell body (1) is R3, wherein The ratio of R1 to R ranges from 30% to 120%; the ratio of R to R3 ranges from 10% to 18%.
  6. 6. The cylindrical battery according to claim 1, wherein, The diameter of the cavity (41) is R, the diameter of the bottom surface of the frustum (2) is R1, and the diameter of the top surface of the frustum (2) is R2, wherein The ratio of R2 to R1 ranges from 10% to 100%, and R2 is smaller than R.
  7. 7. The cylindrical battery according to claim 1, wherein, The height of the cavity (41) is H, the height of the frustum (2) is L, wherein The ratio of L to H ranges from 40% to 100%.
  8. 8. A battery case, comprising: The shell comprises a shell body (1), wherein a first installation cavity (11) is formed in the shell body, a frustum (2) is arranged at the bottom of the first installation cavity (11), and the frustum (2) is arranged along the axial direction of the shell body (1); the frustum (2) is internally provided with a second installation cavity (21), and the second installation cavity (21) is communicated with the lower surface of the shell body (1).
  9. 9. The battery housing of claim 8, wherein the battery housing comprises a plurality of battery cells, The second installation cavity (21) is filled with a phase change material (5); the phase change material (5) comprises graphene and alumina ceramic, wherein The ratio of the mass of the graphene to the mass of the alumina ceramic ranges from 1:99 to 99:1.
  10. 10. The battery housing of claim 8, wherein the battery housing comprises a plurality of battery cells, A heat dissipation element (3) is inserted in the second installation cavity (21); The heat dissipation element (3) is spiral or The side wall of the heat dissipation piece (3) is provided with threads, or The heat dissipation piece (3) is in a step shape or The heat dissipation piece (3) is in a cone shape.

Description

Battery case and cylindrical battery Technical Field The utility model belongs to the technical field of secondary batteries, in particular relates to a battery shell, and particularly relates to a battery shell and a cylindrical battery. Background In the existing cylindrical battery, heat dissipation of an inner battery core mainly depends on conduction of heat from inside to outside to a battery shell, and finally, the heat is dissipated through the shell. When the battery core dissipates heat, two heat conduction paths are provided, one is radial and the other is axial, the radial path is shorter but needs to pass through the multi-layer pole pieces, the thermal conductivity between the pole pieces is poorer, the axial thermal conductivity is better, but the length of the heat conduction path is generally several times that of the radial path, so that the heat in the battery core is difficult to conduct out. Therefore, how to enable the battery cell to quickly dissipate heat is a technical problem that needs to be solved by those skilled in the art. It should be noted that the above information disclosed in this background section is only for understanding the background of the inventive concept and therefore the above description is not to be construed as constituting prior art information. Disclosure of utility model Embodiments of the present disclosure provide at least a battery housing and a cylindrical battery. In a first aspect, an embodiment of the disclosure provides a cylindrical battery, which comprises a housing body, a battery core, a cavity, a second installation cavity and a third installation cavity, wherein the housing body is provided with a first installation cavity, the bottom of the first installation cavity is provided with a frustum, the frustum is arranged along the axial direction of the housing body, the cavity is arranged at the axis of the battery core, the battery core is arranged in the first installation cavity, the frustum is inserted into the cavity, the second installation cavity is formed in the frustum, and the second installation cavity is communicated with the lower surface of the housing body. In an alternative embodiment, the second mounting cavity is filled with a phase change material, wherein the phase change material comprises graphene and alumina ceramic, and the ratio of the mass of the graphene to the mass of the alumina ceramic ranges from 1:99 to 99:1. In an alternative embodiment, the inner wall of the second mounting chamber is provided with a thread groove. In an alternative implementation mode, the second installation cavity is internally provided with a heat dissipation piece, wherein the heat dissipation piece is in a spiral shape, or the side wall of the heat dissipation piece is provided with threads, or the heat dissipation piece is in a step shape, or the heat dissipation piece is in a cone shape. In an alternative embodiment, the cylindrical battery is of the type 18650 (18 mm in outside diameter, 65mm in height), 21700 (21 mm in outside diameter, 70mm in height), 33165 (33 mm in outside diameter, 165mm in height), 32150 (32 mm in outside diameter, 150mm in height), 32140 (32 mm in outside diameter, 140mm in height), 32135 (32 mm in outside diameter, 135mm in height), 42135 (42 mm in outside diameter, 135mm in height), 4680 (46 mm in outside diameter, 80mm in height), 4695 (46 mm in outside diameter, 95mm in height), 46120 (46 mm in outside diameter, 120mm in height), 40135 (40 mm in outside diameter, 135mm in height), 40140 (40 mm in outside diameter, 140mm in height), 46135 (46 mm in outside diameter, 135mm in height), 60130 (60 mm in outside diameter), and the like. In an alternative embodiment, the diameter of the cavity is R, the diameter of the bottom surface of the frustum is R1, the ratio of R1 to R ranges from 30% to 120%, and the ratio of the diameter of the cavity R to the outer diameter of the battery is 10% -18%. In an alternative embodiment, the diameter of the cavity is R, the diameter of the bottom surface of the frustum is R1, the diameter of the top surface of the frustum is R2, wherein the ratio of R2 to R1 ranges from 10% to 100%, and R2 is smaller than R. In an alternative embodiment, the cavity has a height H and the frustum has a height L, wherein the ratio of L to H ranges from 40% to 100%. In a second aspect, the embodiment of the disclosure further provides a battery shell, which comprises a shell body, wherein a first installation cavity is formed in the shell body, a frustum is arranged at the bottom of the first installation cavity, the frustum is arranged along the axial direction of the shell body, a second installation cavity is formed in the frustum, and the second installation cavity is communicated with the lower surface of the shell body. In an alternative embodiment, the second mounting cavity is filled with a phase change material, wherein the phase change material comprises graphene and alumina ceramic, an