Title:
HALF SECONDARY BATTERY AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2019/064645
Kind Code:
A1
Abstract:
The present invention improves the safety of a secondary battery. This half secondary battery comprises an electrode having an electrode current collector and an electrode mixture layer, and an insulating layer formed on the electrode, wherein: when a nail with a tip angle of 30° is used, the tensile strength of the electrode current collector is 16N or lower; the insulating layer comprises a low melting point material; and the melting point of the low melting point material is not higher than the temperature for reducing the valence number of a positive electrode active material. Preferably, the low melting point material is P(VDF-HFP), the addition amount of the low melting point material in the insulating layer is 4-15 wt%, the thickness of the electrode current collector is 15 μm or less, and the electrode current collector is a positive current collector.
Inventors:
SEKI EIJI (JP)
NOIE AKIHIKO (JP)
ABE MAKOTO (JP)
TSUBOUCHI SHIGETAKA (JP)
UNEMOTO ATSUSHI (JP)
KAGA YUSUKE (JP)
NOIE AKIHIKO (JP)
ABE MAKOTO (JP)
TSUBOUCHI SHIGETAKA (JP)
UNEMOTO ATSUSHI (JP)
KAGA YUSUKE (JP)
Application Number:
PCT/JP2018/011208
Publication Date:
April 04, 2019
Filing Date:
March 20, 2018
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H01M10/0565; H01M4/64; H01M10/052; H01M10/058; H01M10/0568
Domestic Patent References:
| WO2015140912A1 | 2015-09-24 | |||
| WO2013051308A1 | 2013-04-11 |
Foreign References:
| JP2017059432A | 2017-03-23 | |||
| CN102199846A | 2011-09-28 | |||
| JP2013020835A | 2013-01-31 | |||
| JP2014207217A | 2014-10-30 |
Attorney, Agent or Firm:
HIRAKI & ASSOCIATES (JP)
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