US 12,469,870 B2
Winding type battery cell and winding battery
Guoyou Deng, Huzhou (CN); Xiaofeng Yin, Huzhou (CN); Cunkui Yin, Huzhou (CN); and Xiaojie Shen, Huzhou (CN)
Assigned to MICROVAST POWER SYSTEMS CO., LTD., Huzhou (CN)
Filed by Microvast Power Systems Co., Ltd., Huzhou (CN)
Filed on Sep. 16, 2022, as Appl. No. 17/932,674.
Claims priority of application No. 202122281542.9 (CN), filed on Sep. 18, 2021.
Prior Publication US 2023/0085630 A1, Mar. 23, 2023
Int. Cl. H01M 10/04 (2006.01); H01M 50/538 (2021.01); H01M 50/586 (2021.01); H01M 50/593 (2021.01)
CPC H01M 10/0431 (2013.01) [H01M 50/538 (2021.01); H01M 50/586 (2021.01); H01M 50/593 (2021.01)] 12 Claims
OG exemplary drawing
 
1. A winding type battery cell comprising a roll core and a plurality of electrode sheet units, wherein the roll core comprises a positive connection part, a negative connection part and an insulation part located between the positive connection part and the negative connection part along a length direction of the roll core, the positive connection part and the negative connection part are respectively connected with two ends of the insulation part along the length direction of the roll core; each electrode sheet unit comprises a positive electrode sheet, a negative electrode sheet and a separator, the positive electrode sheet and the negative electrode sheet are separated by the separator, each electrode sheet unit has a first side extending along the length direction of the roll core and a second side opposite to the first side, wherein the positive electrode sheet is formed with a positive tab provided at the first side of the electrode sheet unit and connected to the positive connection part, the negative electrode sheet is formed with a negative tab provided at the first side of the electrode sheet unit and connected to the negative connection part, wherein all the positive electrode sheets of the electrode sheet units are connected to the positive connection part through their positive tabs, and all the negative electrode sheets of the electrode sheet units are connected to the negative connection part through their negative tabs, the winding type battery cell is formed by winding the electrode sheet units around the positive connection part, the insulation part and the negative connection part of the roll core.