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US 6,642,719 B1Granted
Device for judging life of auxiliary battery
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorHitoshi Seto
Life of this patent
Estimating the term…
Abstract
The depth of discharge of an auxiliary battery 6 is calculated, and the lifetime of the auxiliary battery 6 is determined based on the discharge. characteristic of the calculated one of different depths of discharge.
Claims9
An auxiliary battery life determining device comprising:
- discharge means for connecting an auxiliary battery to a dummy load to discharge a constant current from said auxiliary battery to said dummy load;
- measuring means for measuring the terminal voltage and temperature of said auxiliary battery when said discharge means causes the discharge of the constant current;
- and decision means for calculating the depth of discharge of said auxiliary battery from the measured results by said measuring means and for deciding the lifetime of said auxiliary battery based on said calculated depth of discharge,
- wherein said decision means refers to discharge curves of different depths of discharge, then calculates the amount of power remaining in said auxiliary battery from the measured results by said measuring means.
1 more element
An auxiliary battery life determining device comprising:
- measuring means for measuring the discharge current, terminal voltage and temperature of an auxiliary battery connected to a real load;
- and decision means for calculating the depth of discharge of said auxiliary battery from the measured results by said measuring means and for deciding the lifetime of said auxiliary battery based on said calculated depth of discharge,
- wherein said decision means refers to discharge curves of different depths of discharge, then calculates the amount of power remaining in said auxiliary battery from the measured results by said measuring means.
Dependencies are inferred from the claim text.