Charge control device and charge time calculation method
First Claim
1. A charge control device for charging a battery with electric power output from a charger, comprising:
- a voltage sensor that detects a voltage of the battery;
a current sensor that detects a current of the battery;
a charge state calculation unit configured to calculate a charge state of the battery using the voltage and the current;
a charger control unit configured to control the charger to output a power to charge the battery; and
a charge time calculation unit configured to calculate a remaining charge time of the battery till the charge state of the battery will reach a predetermined charge state based on the charge state calculated by the charge state calculation unit,wherein when a charge current changes from above a current threshold to below the current threshold,the charger control unit is further configured to send, based on the predetermined charge state, at each intermittent predetermined time of a plurality of intermittent predetermined times, a respective command power to the charger control unit to output a command power to charge the battery, wherein the respective command power comprises a respective output timing and a respective current value, andthe charge time calculation unit is further configured to, in response to the charger control unit sending a respective command power to the charger control unit, subtract a respective predetermined time value from the remaining charge time calculated when the charge current falls below the current threshold.
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Abstract
A charge control device that charges a battery using a power output from a charger has a charge state (SOC) calculation unit for calculating the SOC of the battery using the voltage and current of the battery, a charger control unit that controls a charger that charges the battery, and a charge time calculation unit for calculating, on the basis of the SOC calculated by the SOC calculation unit, the remaining charge time of the battery till the SOC of the battery reaches a prescribed SOC. When the charge current falls below a current threshold, the charger control unit sends intermittent power commands to the charger based on the prescribed SOC, and the charge time calculation unit subtracts, from the charge time calculated when the charge current has fallen below the current threshold, predetermined time values based on the power commands.
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Citations
16 Claims
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1. A charge control device for charging a battery with electric power output from a charger, comprising:
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a voltage sensor that detects a voltage of the battery; a current sensor that detects a current of the battery; a charge state calculation unit configured to calculate a charge state of the battery using the voltage and the current; a charger control unit configured to control the charger to output a power to charge the battery; and a charge time calculation unit configured to calculate a remaining charge time of the battery till the charge state of the battery will reach a predetermined charge state based on the charge state calculated by the charge state calculation unit, wherein when a charge current changes from above a current threshold to below the current threshold, the charger control unit is further configured to send, based on the predetermined charge state, at each intermittent predetermined time of a plurality of intermittent predetermined times, a respective command power to the charger control unit to output a command power to charge the battery, wherein the respective command power comprises a respective output timing and a respective current value, and the charge time calculation unit is further configured to, in response to the charger control unit sending a respective command power to the charger control unit, subtract a respective predetermined time value from the remaining charge time calculated when the charge current falls below the current threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 10, 11)
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8. A charge time calculation method for a battery to be charged by a power output from a charger, comprising:
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detecting, by a voltage sensor, a voltage of the battery; detecting, by a current sensor, a current of the battery; calculating, by a charge state calculation unit, a charge state of the battery using the detected voltage and current; when a charge current of the battery falls below a current threshold, calculating, by a charge time calculation unit, a remaining charge time of the battery till the battery charge state will reach a predetermined charge state based on the calculated charge state by intermittently, and until the battery charge state reaches a predetermined charge state, charging the battery with a command power including an output timing and a current value, the command power sent by the charge time calculation unit to a charger control unit configured to control the charger to output a power to charge the battery, and subtracting, by charge time calculation unit, from the remaining charge time that has been calculated when the charge current falls below the current threshold based on the command power; and displaying, on a display unit, the remaining charge time in response to the command power. - View Dependent Claims (9)
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12. A charge control device for charging a battery with electric power output from a charger, comprising:
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a voltage sensor that detects a voltage of the battery; a current sensor that detects a current of the battery; a charge state calculation unit configured to calculate a charge state of the battery using the voltage and the current; a charger control unit configured to control the charger to output a power to charge the battery; and a charge time calculation unit configured to calculate a remaining charge time of the battery when a charge current changes from above a current threshold to below the current threshold, by reducing the remaining charge time calculated immediately before changing to the current threshold upon the charger control unit intermittently sending a charge command to the battery, wherein the remaining charge time is the time until the charge state of the battery will reach a predetermined charge state. - View Dependent Claims (13, 14, 15, 16)
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Specification