Lithium ion secondary battery production method
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United States of America Patent
Stats
-
Apr 16, 2019
Grant Date -
Feb 1, 2018
app pub date -
Feb 16, 2015
filing date -
Feb 16, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A production method is provided for producing a lithium ion secondary battery. The lithium ion secondary battery has an external casing that houses an electrolytic solution and a power generating element. The power generating element includes a positive electrode and a negative electrode layered with a separator. The production method includes first charging the lithium ion secondary battery at a voltage range of 4.0 V or lower and then opening the external casing of the lithium ion secondary battery that has been charged at a range of 4.0 V or lower to discharge gas inside the lithium ion secondary battery to the exterior. Next, the production method further includes re-sealing the external casing and charging the lithium ion secondary battery from which the gas has been discharged until the cell voltage is greater than 4.0 V.
First Claim
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International Classification(s)
- 2015 Application Filing Year
- H01M Class
- 5536 Applications Filed
- 4391 Patents Issued To-Date
- 79.32 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- H01M Class
- 0 % this patent is cited more than
- 6 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Oct 16, 2026 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Oct 16, 2030 |
