SQUARE-TYPE SECONDARY BATTERY AND METHOD FOR MANUFACTURING SAME

Title:

SQUARE-TYPE SECONDARY BATTERY AND METHOD FOR MANUFACTURING SAME

Document Type and Number:

WIPO Patent Application WO/2021/192544

Kind Code:

A1

Abstract:

This square-type secondary battery comprises: an electrode assembly; a square battery case for accommodating the electrode assembly; a sealing plate; a current collector joined by ultrasonic welding to an edge side of a positive electrode plate or a negative electrode plate that extends on the longitudinal end section of the sealing plate; and an external terminal provided outside the sealing plate and connected to the current collector, wherein the sealing plate has a gas discharge valve that breaks when the gas pressure inside the battery case reaches at least a predetermined value, and a thin wall section disposed between the external terminal and the gas discharge valve and having a greater thickness than the gas discharge valve.

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Inventors:

MAESONO HIROSHI

Application Number:

PCT/JP2021/001687

Publication Date:

September 30, 2021

Filing Date:

January 19, 2021

Export Citation:

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Assignee:

SANYO ELECTRIC CO (JP)

International Classes:

H01M50/147; H01M50/342; H01M50/531

Domestic Patent References:

WO2014069575A1	2014-05-08
WO2013021463A1	2013-02-14

Foreign References:

JP2007179793A	2007-07-12
JP2012221943A	2012-11-12
JP2018125110A	2018-08-09
JP2014182949A	2014-09-29
JP2013055038A	2013-03-21
JP2010282851A	2010-12-16
JP2013054821A	2013-03-21

Attorney, Agent or Firm:

TOKUDA Yoshiaki et al. (JP)

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