Battery status monitoring apparatus, saturation polarization detecting method and dischargeable capacity detecting method
First Claim
1. A battery status monitoring device comprising:
- an internal resistance monitoring means for monitoring a voltage drop due to an internal resistance when a drop in the terminal voltage due to polarization occurring during battery discharge is saturated.
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Accused Products
Abstract
A microcomputer 23 monitors, on the basis of outputs from a current sensor 15 and voltage sensor 17, a voltage drop due to an internal resistance when the drop in the terminal voltage due to polarization occurring during the discharge of a battery is saturated, and a dischargeable capacity of the battery corresponding to the value resulting when the saturated voltage drop of the terminal voltage is subtracted from the chargeable capacity of the battery. Such a configuration provide a battery status monitoring device capable of knowing the battery status correctly, a saturation polarization detecting method which is useful to know the charging state of the battery and a dischargeable capacity detecting method.
17 Citations
15 Claims
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1. A battery status monitoring device comprising:
an internal resistance monitoring means for monitoring a voltage drop due to an internal resistance when a drop in the terminal voltage due to polarization occurring during battery discharge is saturated. - View Dependent Claims (3, 10)
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2. A battery status monitoring device comprising:
a dischargeable capacity monitoring means for monitoring a dischargeable capacity, which is obtained by subtracting a voltage drop due to an internal resistance when a drop in the terminal voltage due to polarization occurring during discharge of a battery is saturated from an open circuit voltage corresponding to a chargeable capacity of the battery. - View Dependent Claims (4)
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5. A method of detecting a saturation polarization representative of a saturated value of a drop in the terminal voltage due to polarization occurring during battery discharge, comprising the step of:
detecting the saturation polarization on the basis of an approximated equation of the terminal voltage for a discharge current, which is acquired from a discharge current and terminal voltage of said battery detected during a predetermined period in the battery discharge; and
a pure resistance of said battery.- View Dependent Claims (6, 7, 8, 9, 11, 12, 13, 14, 15)
Specification