Battery control device, battery system, and movable body
First Claim
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1. A battery control device comprising:
- a current detector configured to detect a current value of a current which flows into a lithium ion storage battery which is connected in parallel to a lead storage battery, the lead storage battery and the lithium ion storage battery being chargeable with a fixed current;
a storage which stores an initial value of the current which flows into the lithium ion storage battery when the lithium ion storage battery is charged with the fixed current in an initial use stage of the lithium ion storage battery; and
a state determiner configured tocalculate a ratio between the current value detected by the current detector and the initial value stored in the storage, anddetermine that the lead storage battery has reached an assumed usable period when the calculated ratio is decreased to a first threshold value,wherein, when the lead storage battery and the lithium ion storage battery are charged with the fixed current, the first threshold value is set based on a ratio between the current value of the current flowing into the lithium ion storage battery and the initial value when a current flowing into the lead storage battery becomes equal to the current flowing into the lithium ion storage battery.
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Abstract
According to some embodiments, a battery control device has a current detector, a storage, and a state determiner. The current detector detects a current value of a current which flows into a second battery which is connected in parallel to a first battery. The first battery and the second battery are charged with a fixed current. The storage stores an initial value of the current which flows into the second battery if the second battery is charged with the fixed current in an initial use stage of the second battery. The state determiner determines a state of the first battery based on the current value detected by the current detector and the initial value stored in the storage.
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7 Claims
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1. A battery control device comprising:
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a current detector configured to detect a current value of a current which flows into a lithium ion storage battery which is connected in parallel to a lead storage battery, the lead storage battery and the lithium ion storage battery being chargeable with a fixed current; a storage which stores an initial value of the current which flows into the lithium ion storage battery when the lithium ion storage battery is charged with the fixed current in an initial use stage of the lithium ion storage battery; and a state determiner configured to calculate a ratio between the current value detected by the current detector and the initial value stored in the storage, and determine that the lead storage battery has reached an assumed usable period when the calculated ratio is decreased to a first threshold value, wherein, when the lead storage battery and the lithium ion storage battery are charged with the fixed current, the first threshold value is set based on a ratio between the current value of the current flowing into the lithium ion storage battery and the initial value when a current flowing into the lead storage battery becomes equal to the current flowing into the lithium ion storage battery. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification