Remaining capacity calculating device and method for...

Details Remaining capacity calculating device and method for... Remaining capacity calculating device and method for...

2008-04-22

2008-04-22

Tso, Edward H (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With detection of current or voltage integral

Reexamination Certificate

active

11389098

ABSTRACT:
It calculates a capacity difference ESOC between a reference remaining capacity SOCV based on an open-circuit voltage and a final remaining capacity SOC in a previous one calculation cycle. It calculates a proportional correction amount and an integral correction amount according to a proportional-integral control by using this capacity difference ESOC, and requires a final remaining capacity SOC by adding a remaining capacity SOCI based on a current integration to these correction amounts. Thus, while making good use of the remaining capacity based on the battery open-circuit voltage, it can avoid the influence of the load fluctuation and require a remaining capacity always stable and accurate.

REFERENCES:
patent: 6845332 (2005-01-01), Teruo
patent: 2003/0097225 (2003-05-01), Teruo
patent: 6-242193 (1994-09-01), None
patent: 8-179018 (1996-07-01), None
patent: 11-223665 (1999-08-01), None
patent: 2003-1493078 (2003-05-01), None
Extended Search Report issued in EU Pat. App. No. 06006416.9-2216 dated Jul. 21, 2006.

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