Lithium ion battery control system and assembled battery control system
First Claim
1. A lithium ion battery control system comprising:
- a charging and discharging control circuit that controls charging and discharging of a lithium ion battery;
a degradation rate storage unit that stores a previous degradation rate of the lithium ion battery;
a degradation rate calculating unit that calculates a present degradation rate of the lithium ion battery; and
a degradation rate comparing unit that compares the present degradation rate with the previous degradation rate and that sends a signal for changing a charging and discharging condition of the lithium ion battery to the charging and discharging control circuit when the present degradation rate is greater than the previous degradation rate by a predetermined value.
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Accused Products
Abstract
A lithium ion battery control system includes a degradation rate calculating unit, a degradation rate storage unit, a degradation rate comparing unit, a charging and discharging control circuit, and a rechargeable battery. The degradation rate calculating unit calculates a degradation rate when receiving a trigger for starting the check of the degradation rate of the battery. The degradation rate comparing unit receives a present degradation rate from the degradation rate calculating unit and a previous degradation rate from the degradation rate storage unit and compares both degradation rates. As a result, when the present degradation rate is greater than the previous degradation rate by a predetermined value, a charging and discharging condition is limited.
18 Citations
16 Claims
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1. A lithium ion battery control system comprising:
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a charging and discharging control circuit that controls charging and discharging of a lithium ion battery; a degradation rate storage unit that stores a previous degradation rate of the lithium ion battery; a degradation rate calculating unit that calculates a present degradation rate of the lithium ion battery; and a degradation rate comparing unit that compares the present degradation rate with the previous degradation rate and that sends a signal for changing a charging and discharging condition of the lithium ion battery to the charging and discharging control circuit when the present degradation rate is greater than the previous degradation rate by a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An assembled battery control system controlling charging and discharging of an assembled battery, comprising:
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an assembled battery in which a plurality of lithium ion batteries are connected in series; a plurality of serial circuits that include a resistor and a balancing switch for causing a discharging current to flow independently in each of the plurality of lithium ion batteries; a control circuit that controls the balancing switches; an assembled battery calculation processing unit that controls charging and discharging of the assembled battery; a degradation rate storage unit that stores previous degradation rates of the lithium ion batteries; a degradation rate calculating unit that calculates present degradation rates of the lithium ion batteries; and a degradation rate comparing unit that compares the present degradation rates with the previous degradation rates and that sends a signal for restricting a charging and discharging condition of the assembled battery or the lithium ion batteries when the present degradation rates are greater than the previous degradation rates by a predetermined value. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification