ELECTRODE ASSEMBLY, AND LITHIUM ION ELECTRIC ROLL USING THE ELECTRODE ASSEMBLY

• US 20200136194A1
• Filed: 01/02/2020
• Published: 04/30/2020
• Est. Priority Date: 12/14/2015
• Status: Active Application

• Current Assignee: Dongguan Amperex Technology Limited (TDK Corporation)
• Original Assignee: Dongguan Amperex Technology Limited (TDK Corporation)
• Inventors: Zhu, Junliang, Wang, Haibing, Dong, Tongming, Cheng, Wenqiang, Chen, Baohua, Wu, Shufeng, Yang, Wei, Qin, Zhihua, Lin, Meina
• Application Number:
  US16/733,087
• Publication Number:
  US 20200136194A1
• Time in Patent Office: Days
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0583 of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
• CPC Class Codes: H01M 10/0585 of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
• CPC Class Codes: H01M 10/0587 of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: H01M 50/119 Metals
• CPC Class Codes: H01M 50/121 Organic material
• CPC Class Codes: H01M 50/124 having a layered structure
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

An electrode assembly and a lithium ion electric roll having the same are provided. Also provided is a battery, which includes: a first layer; a second layer located at the side of a surface of the first layer, exposed from the first layer in a first direction view which is perpendicular to a first surface of the first layer; a third layer tucking at least one portion of the second layer with the first layer in the first direction view, being exposed from the second layer in the first direction view; and a conductive plate protruding from a second side of the first layer in the first direction view.

Claims

1. A battery, comprising:

a first layer having

a first surface,

a second surface which is opposite to the first surface,

a first side,

a second side which intersects with the first side of the first layer, and

a third side which intersects with the second side of the first layer,

a second layer being located at the side of the second surface of the first layer, exposed from the first layer in a first direction view which is perpendicular to the first surface of the first layer, and having

a first side which faces to the first side of the first layer in the first direction view,

a second side which intersects with the first side of the second layer, and

a third side which intersects with the second side of the second layer,

a third layer tucking at least one portion of the second layer with the first layer in the first direction view, being exposed from the second layer in the first direction view, and having

a first side which faces to the first side of the second layer in the first direction view,

a second side which intersects with the first side of the third layer, and

a third side which intersects with the second side of the third layer,

a conductive plate protruding from the second side of the first layer in the first direction view, and

wherein a first distance which is from the third side of the first layer to the third side of the second layer is different from a second distance which is from the third side of the second layer to the third side of the third layer.

2. The battery according to claim 1, wherein a third distance from the second side of the first layer to the second side of the second layer is shorter than the first distance in the first direction view.

3. The battery according to claim 2, wherein a fourth distance from the second side of the first layer to the second side of the third layer is shorter than the first distance in the first direction view.

4. The battery according to claim 3, wherein the first layer comprises:

a first conductive layer, having a first surface, and a second surface which is opposite to the first surface of the first conductive layer;

a first insulating layer, located at the side of the second surface of the first conductive layer; and

a second conductive layer, tucking the first insulating layer with the first conductive layer, and

wherein in a width direction view which is parallel to the second side, a width of the first insulating layer is greater than a width of the first conductive layer and a width of the second conductive layer.

5. The battery according to claim 4, wherein the first conductive layer is an anode electrode, the second conductive layer is a cathode electrode, and the width of the first conductive layer is greater than the width of the second conductive layer.

6. The battery according to claim 1, wherein in a width direction view which is parallel to the second side, a width of the first layer, a width of the second layer and a width of the third layer are different.

7. The battery according to claim 1, wherein the first side of the first layer, the first side of the second layer and the first side of the third layer are aligned.

8. The battery according to claim 7, wherein in a width direction view which is parallel to the second side, a width of the second layer is greater than a width of the first layer, and a width of the third layer is greater than the width of the second layer.

9. The battery according to claim 1, wherein in a first direction, a thickness of the first layer, a thickness of the second layer and a thickness of the third layer are different.

10. The battery according to claim 1, wherein the first layer further comprises a fourth side which intersects with the third side of the first layer;

the second layer further comprises a fourth side which intersects with the third side of the second layer;

the third layer further comprises a fourth side which intersects with the third side of the third layer;

a fifth distance is formed from the fourth side of the first layer to the fourth side of the second layer; and

a sixth distance is formed from the fourth side of the second layer to the fourth side of the third layer.

11. The battery according to claim 1, wherein in a length direction view which is parallel to the first side, a length of the first layer, a length of the second layer and a length of the third layer are different.

12. The battery according to claim 1, wherein at least one of the first layer, the second layer and the third layer comprises an anode sheet, a separator and a cathode sheet, the anode sheet, the separator and the cathode sheet are arranged in a stacking manner.

13. The battery according to claim 1, wherein in a width direction view which is parallel to the second side, a width of the first layer equals to a width of the second layer or a width of the third layer, or a width of the second layer equals to a width of the third layer.

14. The battery according to claim 1, wherein the first distance is smaller than the second distance.

15. The battery according to claim 3, wherein the third distance equals to the fourth distance.

16. A battery, comprising:

a first electrode unit having

a first surface,

a second surface which is opposite to the first surface,

a first side,

a second side which intersects with the first side of the first electrode unit, and

a third side which intersects with the second side of the first electrode unit,

a second electrode unit being located at the side of the second surface of the first electrode unit, exposed from the first electrode unit in a first direction view which is perpendicular to the first surface of the first electrode unit, and having

a first side which faces to the first side of the first electrode unit in the first direction view,

a second side which intersects with the first side of the second electrode unit, and

a third side which intersects with the second side of the second electrode unit,

a third electrode unit tucking at least one portion of the second electrode unit with the first electrode unit in the first direction view, being exposed from the second electrode unit in the first direction view, and having

a first side which faces to the first side of the second electrode unit in the first direction view,

a second side which intersects with the first side of the third electrode unit, and

a third side which intersects with the second side of the third electrode unit,

a conductive plate protruding from the second side of the first electrode unit in the first direction view, and

wherein a first distance which is from the third side of the first electrode unit to the third side of the second electrode unit is different from a second distance which is from the third side of the second electrode unit to the third side of the third electrode unit.

17. The battery according to claim 16, wherein a third distance from the second side of the first electrode unit to the second side of the second electrode unit is shorter than the first distance in the first direction view.

18. The battery according to claim 17, wherein a fourth distance from the second side of the first electrode unit to the second side of the third electrode unit is shorter than the first distance in the first direction view.

19. The battery according to claim 18, wherein the first electrode unit comprises:

a first conductive layer, having a first surface, and a second surface which is opposite to the first surface of the first conductive layer;

a first insulating layer, located at the side of the second surface of the first conductive layer; and

a second conductive layer, tucking the first insulating layer with the first conductive layer, and

wherein in a width direction view which is parallel to the second side, a width of the first insulating layer is greater than a width of the first conductive layer and a width of the second conductive layer.

20. The battery according to claim 16, wherein in a first direction, a thickness of the first electrode unit, a thickness of the second electrode unit and a thickness of the third electrode unit are different.

21. The battery according to claim 16, wherein the first electrode unit further comprises

a fourth side which intersects with the third side of the first electrode unit;

the second electrode unit further comprises a fourth side which intersects with the third side of the second electrode unit;

the third electrode unit further comprises a fourth side which intersects with the third side of the third electrode unit;

a fifth distance is formed from the fourth side of the first electrode unit to the fourth side of the second electrode unit; and

a sixth distance is formed from the fourth side of the second electrode unit to the fourth side of the third electrode unit.