Battery life determination apparatus and battery life determination method
First Claim
1. An apparatus for determining life of a battery which supplies charged electricity to an electrical appliance, comprising:
- life storing means for storing a relationship between standard total values of discharge voltages and standard life values;
discharge voltage drop amount totaling means for totaling the discharge voltage drop amounts since the start of the compulsory discharge of the charged battery; and
life determination means for determining the life of the battery from a total value of totaled discharge voltage drop amounts with reference to the relationship stored in the life storing means.
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Abstract
An apparatus for determining life of a battery which supplies charged electricity to an electrical appliance is equipped with a storage part for storing relationship between standard total values of discharge voltage drop amounts since a start of discharge of the battery and standard life values, a discharge voltage drop amount totalizer part for totalizing the discharge voltage drop amounts since the start of discharge with the battery being discharged, and a life determination part for determining the life of the battery from a measured total value of totalized discharge voltage drop amounts and the standard total values of the storage means.
54 Citations
11 Claims
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1. An apparatus for determining life of a battery which supplies charged electricity to an electrical appliance, comprising:
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life storing means for storing a relationship between standard total values of discharge voltages and standard life values;
discharge voltage drop amount totaling means for totaling the discharge voltage drop amounts since the start of the compulsory discharge of the charged battery; and
life determination means for determining the life of the battery from a total value of totaled discharge voltage drop amounts with reference to the relationship stored in the life storing means. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for determining life of a battery which supplies charged electricity to an electrical appliance, comprising:
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life storing means for storing a relationship between standard total values of discharge voltage drop amounts since a start of discharge of the battery and standard life values;
discharge voltage drop amount totaling means for totaling the discharge voltage drop amounts since the start of discharge with the battery being discharged;
life determination means for determining the life of the battery from a measured total value of totaled discharge voltage drop means with reference to the relationship stored in the life storing means;
means for inputting charge history;
means for inputting elapsed time; and
fuzzy interference means for receiving a life value obtained in correspondence to the total value, the charge history and the elapsed time, executing a fuzzy operation and outputting a life value of the battery.
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7. A method for determining life of a battery, comprising:
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storing, in a storage device, a relationship between standard total values of discharge voltage drop amounts since a start of discharge of the battery and standard life values;
measuring discharge voltage drop amounts with a time elapse since the start of discharge with the battery being discharged; and
determining the life of the battery from a measured total value of discharge voltage drop amounts during a specified time elapse and the relationship between standard total values and with reference to the relationship stored in the life storing means. - View Dependent Claims (8, 9, 10)
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11. An electrical appliance which is equipped with a lead-acid battery and which is supplied with a power supply voltage from this lead-acid battery to its circuitry, the electrical appliance comprising:
- discharge characteristic measuring means for measuring discharge characteristic of the battery;
cell failure deciding means for deciding presence or absence of a cell failure from the discharge characteristic; and
means for lowering a discharge termination voltage of the battery by a specified value when presence of a cell failure is decided.
- discharge characteristic measuring means for measuring discharge characteristic of the battery;
Specification