Title:
リチウムイオン二次電池の製造方法
Document Type and Number:
Japanese Patent JP6946803
Kind Code:
B2
Abstract:
To provide a method of manufacturing lithium ion secondary batteries, capable of preventing a short circuit due to metal foreign substances by promoting dissolution of metal substances mixed between a positive electrode plate and a separator into an electrolyte and promoting diffusion of metal ions derived from dissolved metal foreign substances.SOLUTION: A method of manufacturing a lithium ion secondary battery 1 includes: a liquid injection step S2; a first pressurizing step S3 of pressurizing an electrode body 20 in a stacking direction SH by a first pressure P1; a pre-charging step S5 of pre-charging the battery 1 to a first battery voltage V1 while the electrode body 20 is pressurized; a second pressurizing step S7 of pressurizing the electrode body 20 in the stacking direction SH by a second pressure P2 higher than the first pressure P1 while the battery 1 is heated and the viscosity of an electrolyte 17 is lowered; and a main charging step S8 of conditioning-charging the battery 1.SELECTED DRAWING: Figure 3
Inventors:
Kitayoshi Masanori
Hisanao Kojima
Tetsuji Hirato
Shiomi Taku
Hisanao Kojima
Tetsuji Hirato
Shiomi Taku
Application Number:
JP2017139238A
Publication Date:
October 06, 2021
Filing Date:
July 18, 2017
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
H01M10/058; H01M10/0525
Domestic Patent References:
| JP2015219971A | ||||
| JP2007305596A | ||||
| JP2015015084A | ||||
| JP2004139961A | ||||
| JP2005243537A | ||||
| JP2017010878A |
Foreign References:
| WO2013121563A1 | ||||
| WO2013035187A1 | ||||
| WO2011111153A1 |
Attorney, Agent or Firm:
Cosmos International Patent and Trademark Office