Title:
SECONDARY BATTERY AND METHOD FOR MANUFACTURING SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/203534
Kind Code:
A1
Abstract:
The present invention provides a secondary battery capable of not only absorbing shocks more sufficiently but also reducing more sufficiently the risk of an electrode being exposed in the secondary battery and the risk of a separator being nipped between components of an exterior body. A secondary battery 100A according to the present invention includes: roll-type electrode assembly 5 in which a positive electrode 1, a negative electrode 2, and a separator 3 disposed between the positive electrode and the negative electrode are rolled; and a power collector tab 7 disposed at one end of the rolling in the axial direction P, wherein the roll-type electrode assembly 5 has a separator extension 30 where the separator 3 extends more than the positive electrode 1 and the negative electrode 2 at the other end of the rolling in the axial direction P, and the separator 3 has a projecting bent shape (region K) toward the outer circumferential side n1 of the rolling in at least a part of the separator extension 30 in a sectional view along the axis of the rolling.
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Inventors:
AKIZUKI NAOTO (JP)
TANJI YUSUKE (JP)
NISHIMOTO KEISUKE (JP)
TANJI YUSUKE (JP)
NISHIMOTO KEISUKE (JP)
Application Number:
PCT/JP2020/013272
Publication Date:
October 08, 2020
Filing Date:
March 25, 2020
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01M10/04; H01M10/0587; H01M50/469; H01M50/103
Domestic Patent References:
| WO2018123088A1 | 2018-07-05 | |||
| WO2016063835A1 | 2016-04-28 |
Foreign References:
| JP2016115410A | 2016-06-23 |
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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