US 12,334,597 B2
Battery cell and electric device
Chunlei Meng, Ningde (CN)
Assigned to Ningde Amperex Technology Limited, Ningde (CN)
Filed by Ningde Amperex Technology Limited, Ningde (CN)
Filed on Dec. 23, 2021, as Appl. No. 17/560,815.
Prior Publication US 2022/0209374 A1, Jun. 30, 2022
Int. Cl. H01M 50/54 (2021.01); H01M 50/536 (2021.01)
CPC H01M 50/54 (2021.01) [H01M 50/536 (2021.01)] 18 Claims
OG exemplary drawing
 
1. A battery cell, comprising:
an electrode assembly and a housing accommodating the electrode assembly, wherein the electrode assembly comprises a first electrode plate and a second electrode plate alternately arranged and wound together to form a roll;
wherein the first electrode plate comprises:
a current collector, comprising a plurality of flat portions and a plurality of curved portions,
a connecting piece comprising a fixed part having a fixed end and a free part having a free end opposing the fixed end, wherein the fixed end is connected to one of the flat portions of the current collector, the fixed part overlaps with the connected flat portion, and the free end extends away from the connected flat portion in a direction perpendicular to a length direction of the current collector, the free part does not overlap with the current collector, and wherein the connecting piece is made of a flexibly bendable material; and
a tab, wherein a first end of the tab is fixed to the free part of the connecting piece, the tab and the connected flat portion are disposed on different sides of the connecting piece, and a second end of the tab extends beyond the connected flat portion.