Battery power monitoring apparatus for vehicle

Details Battery power monitoring apparatus for vehicle Battery power monitoring apparatus for vehicle

1995-12-04

1997-07-29

Nuzzolillo, M.

Chemistry: electrical current producing apparatus, product, and

With measuring, testing, or indicating means

For charge or liquid level

429 90, 320 48, H01M 1048

Patent

active

056520697

ABSTRACT:
A battery power monitoring apparatus for use in an electric automobile is provided. The battery power monitoring apparatus determines the amount of available reserve electric power remaining in a storage battery based on electric power discharged from the storage battery to an electric motor and a battery characteristic stored in a memory, representing a relation between a voltage level at which a given level of current flows from the storage battery and the then discharged electric power. The battery characteristic is updated based on the latest detected voltage of the storage battery and current flowing from the storage battery. The battery power monitoring apparatus determines that charge polarization has occurred when a voltage level of the storage battery from which the given level of current flows is increased, and prohibits the updating of the battery characteristic. With this operation, the amount of available electric power is calculated correctly even under the influence of charge polarization.

REFERENCES:
patent: 5479085 (1995-12-01), Honda et al.
patent: 5518835 (1996-05-01), Simmonds

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