Charging control device and electricity storage device including a battery
First Claim
1. A charging control device for an electricity storage system having a battery, the battery being charged by a charger in nighttime and being discharged for a load in a following daytime, the charging control device comprising:
- an electricity remaining amount detecting unit to detect an electricity remaining amount Wi of the battery;
a necessary charge amount calculating unit to calculate a necessary charge amount Wc by subtracting the electricity remaining amount Wi from a necessary electricity amount Wr necessary for the following daytime;
a necessary charge period calculating unit to calculate a necessary charge period Tc necessary for charging the battery with the necessary charge amount Wc based on charging properties of the charger and the battery; and
a charging starting unit to start a charging from the charger to the battery at a start timing of the nighttime, whereinthe start timing is defined to go back by the necessary charge period Tc from a target timing, when the charging is defined to be finished at the target timing.
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Abstract
A charging control device for an electricity storage system includes a unit to detect an electricity remaining amount of a battery, a unit to calculate a necessary charge amount, a unit to calculate a necessary charge period, and a unit to start a charging from a charger to the battery at a start timing of nighttime. The start timing is defined to go back by the necessary charge period from a target timing, when the charging is defined to be finished at the target timing. The necessary charge amount is necessary for a following daytime, and is discharged for a load in the daytime.
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Citations
9 Claims
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1. A charging control device for an electricity storage system having a battery, the battery being charged by a charger in nighttime and being discharged for a load in a following daytime, the charging control device comprising:
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an electricity remaining amount detecting unit to detect an electricity remaining amount Wi of the battery; a necessary charge amount calculating unit to calculate a necessary charge amount Wc by subtracting the electricity remaining amount Wi from a necessary electricity amount Wr necessary for the following daytime; a necessary charge period calculating unit to calculate a necessary charge period Tc necessary for charging the battery with the necessary charge amount Wc based on charging properties of the charger and the battery; and a charging starting unit to start a charging from the charger to the battery at a start timing of the nighttime, wherein the start timing is defined to go back by the necessary charge period Tc from a target timing, when the charging is defined to be finished at the target timing. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electricity storage system comprising:
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a battery; a charger to covert alternating voltage of a utility power source to direct-current voltage so as to charge the battery with the direct-current voltage; a power conditioner to covert the direct-current voltage of the battery to alternating voltage so as to discharge the alternating voltage for a load; and a charging and discharging control device to output a control signal to the charger and the power conditioner, wherein the charging and discharging control device controls the charger to charge the battery in a nighttime, the charging and discharging control device controls the battery to discharge for the load through the power conditioner in a daytime, the charging and discharging control device controls includes a necessary charge period calculating unit to calculate a necessary charge period Tc necessary for charging the battery, and a charging starting unit to start the charging at a start timing, the necessary charge period Tc is calculated based on at least one of a before-charging electricity remaining amount of the battery and a necessary electricity remaining amount of the battery necessary for the daytime, and the start timing is defined to go back by the necessary charge period Tc from a target timing, when the charging is defined to be finished at the target timing. - View Dependent Claims (8, 9)
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Specification