Battery and current collector applied thereto, and battery pack and vehicle including the same

Patent metadata

Field	Value
Publication number	US-12199247-B2
Application number	US-202217592597-A
Country	US
Kind code	B2
Filing date	Feb 4, 2022
Priority date	Feb 19, 2021
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

A battery includes an electrode assembly including a first electrode, second electrode, and a separator between the first electrode and the second electrode, the first electrode including a first region coated with an active material and a second region at a first side and adjacent to the first region, the second region being exposed beyond the separator, and at least part of the second region is an electrode tab; a housing including a first end with a first opening, the housing accommodating the electrode assembly; a first current collector including an edge portion on the electrode assembly, a second region coupling portion extending from the edge portion and coupled with the second region, and a terminal coupling portion spaced apart from the second region coupling portion; and a terminal coupled with the terminal coupling portion.

First claim

What is claimed is:

1. A battery, comprising: an electrode assembly including a first electrode, a second electrode, and a separator between the first electrode and the second electrode, the first electrode, the second electrode, and the separator wound about an axis to define a core and an outer circumferential surface, wherein the first electrode includes a first region coated with an active material and a second region at a first side and adjacent to the first region, the second region being exposed beyond the separator, and at least part of the second region is an electrode tab; a housing including a first end with a first opening, the housing accommodating the electrode assembly; a first current collector including an edge portion on the electrode assembly, a second region coupling portion extending from the edge portion and coupled with the second region, and a terminal coupling portion spaced apart from the second region coupling portion, an uppermost surface of the edge portion and an uppermost surface of the terminal coupling portion being parallel and coplanar or a lowermost surface of the edge portion and a lowermost surface of the terminal coupling portion being parallel and coplanar; and a terminal coupled with the terminal coupling portion.

2. The battery according to claim 1 , wherein the edge portion has a rim shape having an inner space with an opening.

3. The battery according to claim 1 , wherein the second region coupling portion and the terminal coupling portion are electrically connected by the edge portion.

4. The battery according to claim 2 , wherein the terminal coupling portion is at a center of the inner space of the edge portion.

5. The battery according to claim 1 , wherein the first current collector further includes a connecting portion extending inward from the edge portion and connected to the terminal coupling portion.

6. The battery according to claim 5 , wherein at least part of the connecting portion is smaller in cross-sectional area than the second region coupling portion.

7. The battery according to claim 6 , wherein at least part of the connecting portion is smaller in at least one of a width or a thickness than the second region coupling portion.

8. The battery according to claim 5 , wherein the connecting portion includes a tapered portion in which a width of the connecting portion is tapered along a direction from an inner surface of the edge portion toward the terminal coupling portion.

9. The battery according to claim 5 , comprising a plurality of the second region coupling portions.

10. The battery according to claim 9 , wherein the plurality of second region coupling portions is arranged along a circumference of the edge portion.

11. The battery according to claim 9 , wherein an extended length of each of the plurality of second region coupling portions is substantially equal to each other.

12. The battery according to claim 9 , wherein a cross-sectional area of each of the plurality of second region coupling portions is substantially equal.

13. The battery according to claim 9 , wherein a width and a thickness of each of the plurality of second region coupling portions is substantially equal.

14. The battery according to claim 9 , wherein the terminal coupling portion is surrounded by the plurality of second region coupling portions.

15. The battery according to claim 9 , wherein the connecting portion is between a pair of adjacent second region coupling portions.

16. The battery according to claim 15 , wherein a distance from the connecting portion to one of the pair of adjacent second region coupling portions along a circumference of the edge portion is substantially equal to a distance to the other one of the pair of adjacent second region coupling portions.

17. The battery according to claim 9 , comprising a plurality of the connecting portions.

18. The battery according to claim 17 , wherein each of the plurality of connecting portions is positioned between pairs of adjacent second region coupling portions.

19. The battery according to claim 17 , wherein the plurality of connecting portions is arranged along a circumference of the edge portion.

20. The battery according to claim 18 , wherein a distance from each of the plurality of connecting portions to one of the pair of adjacent second region coupling portions is substantially equal to a distance to the other one of the pair of adjacent second region coupling portions.

21. The battery according to claim 5 , wherein the connecting portion includes a current interruption portion having a smaller cross-sectional area than a remaining region of the connecting portion.

22. The battery according to claim 21 , wherein the current interruption portion includes a region having a smaller width or thickness than the remaining region of the connecting portion.

23. The battery according to claim 21 , wherein the current interruption portion includes a notch, a groove, or a through-hole formed on at least one surface of the connecting portion.

24. The battery according to claim 1 , wherein the terminal coupling portion is at a location corresponding to a winding hole formed at a winding center of the electrode assembly.

25. The battery according to claim 24 , wherein the terminal coupling portion covers the winding hole formed at the winding center of the electrode assembly to prevent the winding hole from being exposed beyond the terminal coupling portion.

26. The battery according to claim 24 , wherein a diameter of the terminal coupling portion is substantially equal to or larger than a diameter of the winding hole formed at the winding center of the electrode assembly.

27. The battery according to claim 1 , wherein the second region extends toward a second end of the housing opposite to the first end of the housing.

28. The battery according to claim 27 , wherein the second region coupling portion is coupled onto a coupling surface formed by bending an end of the second region along a direction parallel to the first current collector.

29. The battery according to claim 1 , further comprising:
a cap to seal the first opening of the housing.

30. The battery according to claim 29 , wherein the cap is not electrically connected to the electrode assembly and has no polarity.

31. The battery according to claim 29 , wherein the housing includes:
a beading portion adjacent to the first opening and press-fit toward an inner side of the housing; and
a crimping portion formed below the beading portion, and extended and bent to surround a circumferential edge of the cap.

32. The battery according to claim 31 , further comprising:
a sealing gasket in the crimping portion and between the housing and the cap.

33. The battery according to claim 1 , wherein the terminal passes through a second end of the housing opposite to the first end of the housing.

34. The battery according to claim 33 , wherein the terminal passes through a center of the second end.

35. The battery according to claim 33 , wherein the terminal is insulated from the housing.

36. The battery according to claim 35 , wherein an insulation gasket is between the housing and the terminal.

37. The battery according to claim 1 , further c

Assignees

• Lg Energy Solution Ltd

Inventors

• Choi Su-Ji
• Hwangbo Kwang-Su
• Kim Do-Gyun
• Min Geon-Woo
• Jo Min-Ki
• Lim Jae-Won
• Kim Hak-Kyun
• Lee Je-Jun
• Jung Ji-Min
• Lim Hae-Jin
• Kim Jae-Woong
• Park Jong-Sik
• Choe Yu-Sung
• Lee Byoung-Gu
• Ryu Duk-Hyun
• Lee Kwan-Hee
• Lee Jae-Eun
• Kang Bo-Hyun
• Kong Jin-Hak
• Lee Soon-O
• Choi Kyu-Hyun
• Park Pil-Kyu

Classifications

• H01M50/188

  the sealing members being arranged between the lid and terminal · CPC title

• H01M50/55

  on the same side of the cell · CPC title

• H01M50/179

  for cells having curved cross-section, e.g. round or elliptic (H01M50/176, H01M50/181 take precedence) · CPC title

• H01M50/509

  characterised by the type of connection, e.g. mixed connections · CPC title

• H01M50/559

  Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells (H01M50/553 takes precedence) · CPC title