Battery capacity estimating system and method

Details Battery capacity estimating system and method Battery capacity estimating system and method

1994-04-28

1995-04-04

Regan, Maura K.

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

364481, 364483, 324427, G01R 2726

Patent

active

054041066

ABSTRACT:
A remaining capacity estimating system and method for an automobile battery capable of estimating and displaying an accurate remaining battery capacity by calculating an internal resistance value of the battery based on a terminal voltage in a disconnected state to electrical loads, a terminal voltage in a selectively connected state to an electrical load and a discharge current value in this connected state, then obtaining a remaining battery capacity at the present temperature condition from a map showing a relationship among a remaining battery capacity, a discharge current and an internal resistance, and finally transforming the obtained remaining battery capacity into a remaining battery capacity at a standard temperature condition.

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