US 12,451,568 B2
Button battery
Xiaoxia Wang, Guangdong (CN)
Assigned to SHENZHEN HYNETECH COMPANY LIMITED, Guangdong (CN)
Appl. No. 17/922,274
Filed by SHENZHEN HYNETECH COMPANY LIMITED, Guangdong (CN)
PCT Filed Apr. 25, 2021, PCT No. PCT/CN2021/089688
§ 371(c)(1), (2) Date Oct. 28, 2022,
PCT Pub. No. WO2021/218868, PCT Pub. Date Nov. 4, 2021.
Claims priority of application No. 202010367316.X (CN), filed on Apr. 30, 2020.
Prior Publication US 2023/0163432 A1, May 25, 2023
Int. Cl. H01M 50/538 (2021.01); H01M 50/109 (2021.01); H01M 50/166 (2021.01); H01M 50/184 (2021.01); H01M 50/545 (2021.01); H01M 50/566 (2021.01)
CPC H01M 50/538 (2021.01) [H01M 50/109 (2021.01); H01M 50/166 (2021.01); H01M 50/184 (2021.01); H01M 50/545 (2021.01); H01M 50/566 (2021.01)] 9 Claims
OG exemplary drawing
 
1. A button battery comprising:
an electrode assembly unit comprising a first winding core, a first tab, and a first current collector, wherein the first winding core comprises a first electrode layer, a second electrode layer, and a first diaphragm sandwiched between the first electrode layer and the second electrode layer that are adjacent to each other, the first electrode layer and the second electrode layer have opposite polarities;
wherein the button battery further comprises a battery housing, a battery cover, and an insulating sealing ring, the battery housing and the battery cover cooperatively forms a sealing cavity through the sealing ring, electrolyte is stored in the sealing cavity, the electrode assembly unit is located in the sealing cavity, the first electrode layer is electrically connected to the battery cover through the first tab, and the second electrode layer is electrically connected to the battery housing through the first current collector;
wherein the electrode assembly unit further comprises a second winding core, the second winding core cooperates with the first winding core to form a preset shape, the second winding core comprises a third electrode layer having the same polarity as the first electrode layer, a fourth electrode layer having the same polarity as the second electrode, and a second diaphragm sandwiched between the third electrode layer and the fourth electrode layer that are adjacent to each other, the first electrode layer and the third electrode layer are both electrically connected to the battery cover through the first tab, the second electrode layer and the fourth electrode layer are both electrically connected to the battery housing through the first current collector.