Title:
SEALING FILM AND TAB LEAD AND SECONDARY BATTERY USING SAME
Document Type and Number:
WIPO Patent Application WO/2021/100213
Kind Code:
A1
Abstract:
This sealing film is arranged between an exterior package and a lead conductor connected to a positive electrode or a negative electrode in a secondary battery covered by the exterior package. The sealing film is characterized by being a multilayer sealing film of three layers obtained by forming a core layer and skin layers on both surfaces thereof. The sealing film is also characterized in that the core layer contains a polypropylene having a melting point of 158-166ºC and a melt flow rate (MFR) of 1-3 g/10 min, the skin layers contain a polypropylene having a melting point of 128-150ºC and a melt flow rate (MFR) of 1-7 g/10 min, the Charpy strength of the core layer is at least 15 kJ/m2, the thickness of the sealing film is 30-300 μm, and the ratio of the thickness of the skin layers to the thickness of the core layer is 0.2-5. The sealing film is used to produce a secondary battery having excellent insulating properties and sealing performance.
Inventors:
SUNG YONGSUK (JP)
TAKEICHI MOTOHIDE (JP)
YANO TAKESHI (JP)
TAKEICHI MOTOHIDE (JP)
YANO TAKESHI (JP)
Application Number:
PCT/JP2020/003530
Publication Date:
May 27, 2021
Filing Date:
January 30, 2020
Export Citation:
Assignee:
CHEMSOL INC (JP)
International Classes:
H01M2/06; H01M2/08; H01M2/34
Foreign References:
| JP2017033820A | 2017-02-09 | |||
| JP2016091939A | 2016-05-23 | |||
| JP2017069151A | 2017-04-06 | |||
| JP2014225378A | 2014-12-04 | |||
| KR101327868B1 | 2013-11-11 |
Attorney, Agent or Firm:
SETOUCHI INTERNATIONAL PATENT FIRM (JP)
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