초록 ▼

Detected values of a voltage and a current of a battery which are supplied from a voltage and current detector are stored in a memory at a plurality of times while the battery is being discharged. A regression line calculator determines an internal resistance and an open-circuit voltage (non-load vo

Detected values of a voltage and a current of a battery which are supplied from a voltage and current detector are stored in a memory at a plurality of times while the battery is being discharged. A regression line calculator determines an internal resistance and an open-circuit voltage (non-load voltage or electromotive force) of the battery based on the detected values stored in the memory. Even when the battery is in use with the voltage and the current frequency varying while it is being discharged, a memory effect on the battery can be determined from a reduction in the open-circuit voltage and a deterioration of the battery can be determined from an increase in the internal resistance.

대표청구항 ▼

A system for determining conditions of a nickel-based secondary battery mounted as a power unit on an electrically propelled vehicle, comprising: a voltage sensor for detecting a voltage across the battery, a current sensor for detecting a current flowing from the battery to a load; a memory for sto

A system for determining conditions of a nickel-based secondary battery mounted as a power unit on an electrically propelled vehicle, comprising: a voltage sensor for detecting a voltage across the battery, a current sensor for detecting a current flowing from the battery to a load; a memory for storing the detected values of the voltage and current from said voltage sensor and said current sensor at a plurality of times while the battery is being discharged; and processing means for calculating an internal resistance and an open-circuit voltage of the battery based on the detected values stored in said memory, determining a deterioration of the battery based on the internal resistance, and determining a memory effect on the battery based on the open-circuit voltage.