Battery state determination device
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United States of America Patent
Stats
-
Jan 30, 2018
Issued Date -
N/A
app pub date -
Mar 13, 2014
filing date -
Apr 12, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
This battery state determination device (10) is provided with: a voltage detection unit (13) that detects the voltage (V) of a rechargeable battery (M) to be evaluated; a current detection unit (12) that detects the current of the rechargeable battery (M); a charge state detection unit (11) that detects the state of charge (SOC) of the rechargeable battery (M); and a determination unit (11) configured so as to calculate the absolute value of the voltage gradient (G), which indicates the change in voltage with respect to the discharge amount (Ah), when the state of charge (SOC) of the rechargeable battery (M) is less than 40%, compare the absolute value of the voltage gradient (G) to a pre-set upper limit value (Gmax), and, when the absolute value of the voltage gradient (G) is greater than the upper limit value (Gmax), determine that a small short circuit has occurred in the rechargeable battery (M).
First Claim
Other Claims data not available
Family
International Classification(s)
- 2014 Application Filing Year
- H02J Class
- 3785 Applications Filed
- 3269 Patents Issued To-Date
- 86.37 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- H02J Class
- 22.71 % this patent is cited more than
- 7 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 | Jul 30, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jul 30, 2029 |
