US 12,230,767 B2
Non-aqueous electrolyte secondary battery and method for manufacturing non-aqueous electrolyte secondary battery
Atsushi Kaiduka, Osaka (JP); and Noriko Sugii, Tokushima (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/435,532
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Mar. 6, 2020, PCT No. PCT/JP2020/009590
§ 371(c)(1), (2) Date Sep. 1, 2021,
PCT Pub. No. WO2020/184417, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 2019-045841 (JP), filed on Mar. 13, 2019.
Prior Publication US 2022/0149438 A1, May 12, 2022
Int. Cl. H01M 10/0587 (2010.01); H01M 50/409 (2021.01); H01M 50/469 (2021.01); H01M 50/571 (2021.01); H01M 10/0525 (2010.01); H01M 50/489 (2021.01); H01M 50/586 (2021.01)
CPC H01M 10/0587 (2013.01) [H01M 50/409 (2021.01); H01M 50/469 (2021.01); H01M 50/571 (2021.01); H01M 10/0525 (2013.01); H01M 50/489 (2021.01); H01M 50/586 (2021.01)] 8 Claims
OG exemplary drawing
 
1. A non-aqueous electrolyte secondary battery comprising:
a wound-type electrode assembly including a positive electrode and a negative electrode wound together with a separator interposed therebetween; and
a battery case housing the electrode assembly,
wherein the positive electrode has a positive electrode current collector and a positive electrode mixture layer formed on at least one face of the positive electrode current collector, and
the separator has a normal region and a plastically deformed region having a puncture strength larger than that of the normal region,
wherein the plastically deformed region comprises part of the separator stretched in a winding direction when winding the positive electrode and the negative electrode together with the separator interposed therebetween, to thereby plastically deform the part of the separator.