Title:
非水電解質二次電池
Document Type and Number:
Japanese Patent JP6579109
Kind Code:
B2
Abstract:
A nonaqueous electrolyte secondary battery having an electrode group in which a positive electrode plate containing a positive electrode active material and a negative electrode plate containing a negative electrode active material are wound with a separator there between. The positive electrode active material uses a lithium transition metal oxide represented by the formula LiaNixM1−xO2 (0.9≤a≤1.2, 0.8≤x<1, and M is at least one element of Co, Mn, and Al). The positive electrode plate is provided with a current-collecting tab placed in a position that is 200 mm or more apart from the winding start of the positive electrode plate. The separator has an MD direction tensile strength (SMD)-to-TD direction tensile strength (STD) ratio (SMD/STD) of from 0.72 to 1.37 and an MD direction tensile elongation (EMD)-to-TD direction tensile elongation (ETD) ratio (EMD/ETD) of from 0.34 to 1.29.
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Inventors:
Uwata Yuuri
Naoya Tsukamoto
Naoya Tsukamoto
Application Number:
JP2016551487A
Publication Date:
September 25, 2019
Filing Date:
August 27, 2015
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
H01M10/0587; H01M4/131; H01M4/36; H01M4/48; H01M4/505; H01M4/525; H01M10/052; H01M50/451; H01M50/494; H01M50/454; H01M50/489; H01M50/491
Domestic Patent References:
| JP63279562A | ||||
| JP2011113915A | ||||
| JP7320770A | ||||
| JP11204142A | ||||
| JP2008146969A | ||||
| JP2002015771A | ||||
| JP2005317512A |
Foreign References:
| WO2010134258A1 | ||||
| WO2007069560A1 | ||||
| WO2013038701A1 |
Attorney, Agent or Firm:
Tokuda Yoshiaki
Hiroki Nishida
Hiroki Nishida