Current collector and cylinderical battery cell body

Abstract

A current collector is applicable to cylindrical battery cells. The current collector includes a body and a hollow cone-shaped body connecting the body. The body includes N sector-shaped structures, where N ≥ 4. These sector-shaped structures surround the hollow cone and extend outward toward an XY plane formed by the X and Y axes. A main through-channel is formed at the outer edge of each adjacent sector-shaped structure. The hollow cone is located at the center of the body and protrudes outward along the Z-axis from one side of the body. The two ends of the hollow cone have a first central opening and a second central opening that communicate with each other. The X, Y, and Z axes are perpendicular to each other.

Claims

1. A current collector suitable for a cylindrical battery cell, wherein the current collector includes a body and a hollow cone connected to the body; wherein the body includes N sector structures and N≧4, the sector structures extending outward around the hollow cone toward an XY plane formed by an X-axis and a Y-axis, a main through channel being formed on the outer edge of one of the adjacent sector structures, the hollow cone being located at the center of the body and protruding outward from one side of the body along a Z-axis, the two ends of the hollow cone having a first central opening and a second central opening communicating with each other, and the X-axis, the Y-axis and the Z-axis being perpendicular to each other.

2. The collector disk as described in request item 1, wherein N=6.

3. The collector disk as claimed in claim 2, wherein each of the fan-shaped structures further has a through channel, and each through channel defines a first arcuate rib and a second arcuate rib constituting the fan-shaped structure along both sides of the XY plane.

4. The collector disk as claimed in claim 3, wherein each of the fan-shaped structures has an upper surface and a lower surface on two opposite sides and includes: a first recess, a recessed structure formed on the portion of the first arcuate rib from the upper surface along the Z-axis toward the second central opening; and a second recess, a recessed structure formed on the portion of the second arcuate rib from the upper surface along the Z-axis toward the second central opening; wherein the outer contours of the first recess and the second recess are substantially the same as the secondary through channel.

5. The manifold as claimed in claim 1, wherein each of the main through channels has: a bi-pronged channel extending from one outer edge of the fan-shaped structure along the XY plane toward the first central opening, wherein the bi-pronged channel has an opening facing the first central opening; and an L-shaped channel engaging with the bi-pronged channel and extending from the inner side of the bi-pronged channel through the opening.

6. The manifold as described in claim 5, wherein the L-shaped channel extends into the hollow cone.

7. The collector disk as claimed in claim 5, wherein each of the fan-shaped structures includes a first arcuate rib, a second arcuate rib, and a third arcuate rib, the first arcuate rib, the second arcuate rib, and the third arcuate rib being arranged sequentially from the first central opening toward the outer edge of the fan-shaped structure.

8. The collector plate as described in claim 7, wherein the first arc-shaped rib is in the shape of a "1", the second arc-shaped rib is in the shape of an "L", and the third arc-shaped rib is in the shape of a "T".

9. The collector disk as described in claim 1, wherein the body, the first central opening, and the second central opening are coaxial, a radius R1 of the body is defined from the axis to the outer edge of the body, a radius R2 of the first central opening is defined from the axis to the edge of the first central opening, and a radius R3 of the second central opening is defined from the axis to the edge of the second central opening, and the radius R1: radius R2: radius R3 = 11.3~18.8:1~2:

1.

10. The collector plate as claimed in claim 9, wherein the inner wall of the hollow cone has an inclination angle of 10 to 30 degrees relative to the Z-axis.

11. The collector plate as described in claim 10, wherein the hollow cone is 1 mm to 2 mm away along one axial direction of the Z-axis.

12. The collector plate as described in claim 1, wherein the outer wall surface of the hollow cone is an oblique annular surface, and the oblique annular surface is provided with a plurality of anti-slip textures or a plurality of microstructures.

13. A cylindrical battery cell comprising: a cylindrical battery cell; and at least one current collector as described in any one of claims 1 to 4 and 9 to 12, covering one end face of the cylindrical battery cell.

14. The cylindrical battery cell as claimed in claim 13, wherein the cylindrical battery cell includes a plurality of tabs that are radially outwardly curved from the second central opening, and the current collector covers the tabs.

15. A cylindrical battery cell comprising: a cylindrical battery cell; and at least one current collector as described in any one of claims 1, 5 to 12, covering one end face of the cylindrical battery cell.

16. The cylindrical battery cell as claimed in claim 15, wherein the cylindrical battery cell includes a plurality of tabs that are radially outwardly curved from the second central opening, and the current collector covers the tabs.

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