US 12,424,666 B2
Electrochemical apparatus and electronic apparatus
Shimeng Zhao, Ningde (CN)
Assigned to NINGDE AMPEREX TECHNOLOGY LIMITED, Ningde (CN); and DONGGUAN AMPEREX TECHNOLOGY LIMITED, Dongguan (CN)
Filed by Ningde Amperex Technology Limited, Ningde (CN); and Dongguan Amperex Technology Limited, Dongguan (CN)
Filed on Mar. 30, 2022, as Appl. No. 17/709,193.
Application 17/709,193 is a continuation of application No. PCT/CN2021/084681, filed on Mar. 31, 2021.
Prior Publication US 2022/0320595 A1, Oct. 6, 2022
Int. Cl. H01M 10/0587 (2010.01); H01M 10/0525 (2010.01); H01M 50/121 (2021.01); H01M 50/124 (2021.01); H01M 50/242 (2021.01)
CPC H01M 10/0587 (2013.01) [H01M 10/0525 (2013.01); H01M 50/121 (2021.01); H01M 50/124 (2021.01); H01M 50/242 (2021.01)] 19 Claims
OG exemplary drawing
 
1. An electrochemical apparatus, comprising:
a case and a wound electrode assembly disposed inside the case;
wherein
the electrode assembly comprises a first electrode plate, and a second electrode plate having a polarity opposite to that of the first electrode plate;
the first electrode plate or the second electrode plate is disposed between a first separator and a second separator, the first separator or the second separator is provided between the first electrode plate and the second electrode plate, and the first electrode plate comprises a first current collector;
wherein
a first adhesive layer is provided on at least one of a surface of the first separator facing away from a center of the electrode assembly or a surface of the second separator facing away from the center of the electrode assembly;
at least one of the first separator or the second separator extends out from a terminating end of the electrode assembly and is bonded to the case through the first adhesive layer;
a bonding area between the first adhesive layer and the case is greater than or equal to 10% of a contact area between the case and the electrode assembly; and
the first adhesive layer comprises a polymer, a softening temperature of the polymer is from 130° C. to 170° C.;
wherein a second adhesive layer is further provided on at least one of a surface of the first separator facing toward the center of the electrode assembly or a surface of the second separator facing toward the center of the electrode assembly; and at least one of the first separator or the second separator extends out from a terminating end of the second electrode plate and is bonded to the first current collector through the second adhesive layer;
wherein
a bonding force between the first separator and a surface of the first current collector facing away from the center of the electrode assembly is F2 and a bonding force between the first separator and the case is F1, or
a bonding force between the second separator and a surface of the first current collector facing away from the center of the electrode assembly is F2 and a bonding force between the second separator and the case is F1;
wherein F2 is greater than F1.