US 12,394,826 B2
Electrode assembly and battery
Pan Wang, Ningde (CN); Xiao Chen, Ningde (CN); Huijun Liu, Ningde (CN); and Changchuan Shi, Ningde (CN)
Assigned to Ningde Amperex Technology Limited, Ningde (CN)
Appl. No. 17/281,360
Filed by Ningde Amperex Technology Limited, Ningde (CN)
PCT Filed May 20, 2020, PCT No. PCT/CN2020/091385
§ 371(c)(1), (2) Date Mar. 30, 2021,
PCT Pub. No. WO2021/232313, PCT Pub. Date Nov. 25, 2021.
Prior Publication US 2022/0115712 A1, Apr. 14, 2022
Int. Cl. H01M 10/0587 (2010.01); H01M 50/531 (2021.01)
CPC H01M 10/0587 (2013.01) [H01M 50/531 (2021.01)] 19 Claims
OG exemplary drawing
 
1. An electrode assembly, comprising:
a first electrode plate;
a second electrodeplate, with a polarity opposite to the polarity of the first electrode plate;
a separator, being arranged between the first electrode plate and the second electrode plate, the electrode assembly being formed by winding the first electrode plate, the separator and the second electrode plate;
wherein the first electrode plate comprises a first current collector and a first active material layer; the first active material layer is arranged on a surface of the first current collector; and a winding terminating end of the first electrode plate is positioned on an outer side of a winding terminating end of the second electrode plate facing away from a winding core; the first active material layer on the winding terminating end of the first electrode plate covers one surface of the first current collector facing toward the second electrode plate, the other surface on the winding terminating end of the first electrode plate facing away from the second electrode plate is not coated with the first active material layer;
an outer surface of the electrode assembly includes a first plane, a second plane, a first arc surface and a second arc surface; the first plane, the second arc surface, the second plane, and the first arc surface are arranged along a winding direction of the electrode assembly; along a thickness direction of the electrode assembly, the first plane and the second plane are arranged opposite to each other; along a width direction of the electrode assembly, the first arc surface and the second arc surface are arranged opposite to each other; a thickness of the electrode assembly, defined between the first plane and the second plane, is less than a distance along the width direction of the electrode assembly between the first arc surface and the second arc surface;
the electrode assembly further comprising a first adhesive member, the first adhesive member is arranged on the outer surface of the electrode assembly, wherein the electrode assembly further comprises a second adhesive member; the first adhesive member consists of portions that cover the first plane, the second arc surface, and the second plane of the electrode assembly; the first adhesive member is connected to and overlaps with the second adhesive member, and the second adhesive member is connected to the winding terminating end of the first electrode plate and covers the first arc surface of the electrode assembly, wherein the second adhesive member further extends to overlap with both the winding terminating end of the first electrode plate and the winding terminating end of the second electrode plate.