Title:
POWER STORAGE DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/145736
Kind Code:
A1
Abstract:
A power storage device of the present disclosure comprises an electrode body and an external can accommodating the electrode body, wherein: the bottom of the external can is provided with an exhaust valve; the exhaust valve includes a plurality of curved first grooves, a first valve part, which is a region surrounded by annular grooves formed by the intersection of the plurality of first grooves, at least one second curved groove extending outward from the first valve part, and a second valve part that is surrounded by the first grooves and the second groove, and is adjacent to the first valve part; the plurality of first grooves have a plurality of intersections where adjacent first grooves intersect; the plurality of intersections include a first intersection and a second intersection adjacent to the first intersection; and the at least one second groove has a first end connected to the first intersection, and a second end positioned more on the second intersection side than the first end and positioned away from the first valve part.
Inventors:
HASHIMOTO JUNYA
OKUTANI OOSE
MIHARA SATORU
OKUTANI OOSE
MIHARA SATORU
Application Number:
PCT/JP2023/002129
Publication Date:
August 03, 2023
Filing Date:
January 24, 2023
Export Citation:
Assignee:
PANASONIC HOLDINGS CORP (JP)
PANASONIC ENERGY CO LTD (JP)
PANASONIC ENERGY CO LTD (JP)
International Classes:
H01M50/342; H01M50/107
Domestic Patent References:
| WO2010100731A1 | 2010-09-10 |
Foreign References:
| JP2019153388A | 2019-09-12 | |||
| CN112382826A | 2021-02-19 | |||
| JP2015149161A | 2015-08-20 | |||
| JP2021136194A | 2021-09-13 |
Attorney, Agent or Firm:
TOKUDA Yoshiaki et al. (JP)
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