US 11,817,543 B2
Electrode sheet and battery cell
Xiang Li, Ningde (CN); Huixin Wang, Ningde (CN); Qiaoshu Hu, Ningde (CN); and Yibo Zhang, Ningde (CN)
Assigned to NINGDE AMPEREX TECHNOLOGY LIMITED, Ningde (CN)
Filed by NINGDE AMPEREX TECHNOLOGY LIMITED, Ningde (CN)
Filed on Dec. 18, 2019, as Appl. No. 16/718,852.
Claims priority of application No. 201910422550.5 (CN), filed on May 21, 2019.
Prior Publication US 2020/0373546 A1, Nov. 26, 2020
Int. Cl. H01M 50/538 (2021.01); H01M 50/54 (2021.01); H01M 50/541 (2021.01); H01M 50/533 (2021.01); H01M 50/531 (2021.01); H01M 50/526 (2021.01); H01M 10/04 (2006.01); H01M 50/534 (2021.01); H01M 50/536 (2021.01)
CPC H01M 10/0431 (2013.01) [H01M 50/534 (2021.01); H01M 50/536 (2021.01); H01M 50/538 (2021.01)] 6 Claims
OG exemplary drawing
 
6. A battery cell comprising an electrode assembly formed by winding a first electrode sheet and a second electrode sheet, wherein the first electrode sheet and the second electrode sheet are spaced apart from each other, wherein an isolation film is sandwiched between the first electrode sheet and the second electrode sheet, wherein the first electrode sheet comprises:
an electrode sheet body having a length direction and a width direction perpendicular to the length direction; and
a plurality of tabs electrically connected to the electrode sheet body and are stacked, each of the plurality of tabs having a width in the width direction and a length in the length direction; and
a tab lead, wherein the tabs of the first electrode sheet are electrically connected to the tab lead,
wherein each of the plurality of tabs comprises a polymer layer, a first metal layer located on a first surface of the polymer layer, and a second metal layer located on a second surface of the polymer layer, the second surface being opposite to the first surface, and the first metal layer and the second metal layer of said tab are not electrically connected within said tab, wherein the width of each of the plurality of tabs is different from one another and wherein a first metal layer of one tab is arranged on a second metal layer of another tab;
the plurality of tabs of the first electrode sheet comprise a first tab unit and a second tab unit, the second tab unit extends beyond the first tab unit in the width direction of the battery cell,
wherein the first tab unit is electrically connected to the tab lead through a first region, and the second tab unit is electrically connected to the tab lead through a second region,
wherein the first region is closer to a main body of the electrode assembly than the second region, and
wherein a second metal layer of the first tab unit is indirectly and electrically connected to a first metal layer of the second tab unit through the tab lead and a first metal layer of the second tab unit.