Invention Grant
- Patent Title: Method for manufacturing lithium ion secondary battery, and packaging thereof containing pre-charged lithium ion secondary battery
- Patent Title (中): 制造锂离子二次电池的方法及其包含预充电的锂离子二次电池的包装
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Application No.: US13510819Application Date: 2010-09-30
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Publication No.: US08814955B2Publication Date: 2014-08-26
- Inventor: Tomokazu Kumeuchi , Koichi Zama , Daisuke Kono
- Applicant: Tomokazu Kumeuchi , Koichi Zama , Daisuke Kono
- Applicant Address: JP Kanagawa
- Assignee: NEC Energy Devices, Ltd.
- Current Assignee: NEC Energy Devices, Ltd.
- Current Assignee Address: JP Kanagawa
- Agency: Sughrue Mion, PLLC
- Priority: JP2009-263433 20091119
- International Application: PCT/JP2010/067051 WO 20100930
- International Announcement: WO2011/061999 WO 20110526
- Main IPC: H01M10/44
- IPC: H01M10/44

Abstract:
There is provided a lithium ion secondary battery exhibiting a high capacity retention rate over a long period. There is also provided a method for manufacturing a lithium ion secondary battery including a positive electrode, a negative electrode containing a negative electrode active material layer containing a graphite, an aprotic electrolyte solution containing a sulfonate ester having at least two sulfonyl groups, and a packaging material including a laminate film involving the positive electrode, the negative electrode and the aprotic electrolyte solution, the method including: enclosing the positive electrode, the negative electrode and the aprotic electrolyte solution in the packaging material to fabricate a lithium ion secondary battery before pre-charge; pre-charging the lithium ion secondary battery; and opening the enclosure of the packaging material of the lithium ion secondary battery after pre-charge, thereafter vacuum sealing the packaging material, and regularly charging the lithium ion secondary battery after pre-charge, wherein the current for the pre-charge is 0.05 to 0.25 C, and the voltage thereof is 3.3 to 3.5 V.
Public/Granted literature
- US20120227253A1 METHOD FOR MANUFACTURING LITHIUM ION SECONDARY BATTERY Public/Granted day:2012-09-13
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