Charge control device for a secondary battery
First Claim
1. A charge control device comprising:
- a charge circuit for supplying a charging voltage (Vc) or a charging current (Ic) to a secondary battery used for driving an appliance;
charged level setting means for switching a charged mode between a fully charged mode in which a fully charged state is a targeted charged state and a low charged mode in which a charged state whose charging rate is decreased by a predetermined percentage from that of the fully charged state is a targeted charged state;
detection means for detecting a charged level of the secondary battery;
discharge means for discharging the secondary battery;
control means for operating the charge circuit while a charged level detected by the detection means is lower than a targeted charged state in the charged mode, which is currently selected by the charged level setting means, and operating the discharge means while a charged level detected by the detection means is higher than a targeted charged state in the charged mode, which is currently selected by the charged level setting means; and
a storage device for storing a fully charged capacity of the secondary battery in the fully charged mode, and for storing a fully charged capacity of the secondary battery in the low charged mode,wherein in the low charged mode, a remaining capacity of the secondary battery is indicated in accordance with the following equation;
RSOC(%)=RC/(FCC/CV)*100,wherein RSOC is the remaining capacity of the secondary battery, RC is a current charge capacity of the secondary battery, FCC is the fully charged capacity of the secondary battery in the low charged mode, and CV is a conversion factor, andwherein the fully charged mode is a first constant-voltage charged mode in which the secondary battery is charged at a first voltage, and the low charged mode is a second constant-voltage charged mode in which the secondary battery is charged at a second voltage which is lower than the first voltage.
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Accused Products
Abstract
A charge circuit 6 supplies a charging voltage (Vc) or a charging current to a secondary battery 2, 24 to 26 used for driving an appliance 21; a charged level setting device 5, Sc1 causes the charge circuit 6 to charge the secondary battery 2, 24 to 26 to a predetermined charged level, and detection means 12 detects a charged level of the secondary battery 2; a discharge section 21, 5, Sc1 discharges the secondary battery 2; and control means operates the charge circuit 6 when the predetermined charged level is higher than the detected charged level, and discharges the secondary battery by the discharge section 21, 5, Sc1 when the predetermined charged level is lower than the detected charged level Thus, it is possible to provide a charge control device capable of extending a cycle life of a secondary battery.
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Citations
13 Claims
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1. A charge control device comprising:
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a charge circuit for supplying a charging voltage (Vc) or a charging current (Ic) to a secondary battery used for driving an appliance; charged level setting means for switching a charged mode between a fully charged mode in which a fully charged state is a targeted charged state and a low charged mode in which a charged state whose charging rate is decreased by a predetermined percentage from that of the fully charged state is a targeted charged state; detection means for detecting a charged level of the secondary battery; discharge means for discharging the secondary battery; control means for operating the charge circuit while a charged level detected by the detection means is lower than a targeted charged state in the charged mode, which is currently selected by the charged level setting means, and operating the discharge means while a charged level detected by the detection means is higher than a targeted charged state in the charged mode, which is currently selected by the charged level setting means; and a storage device for storing a fully charged capacity of the secondary battery in the fully charged mode, and for storing a fully charged capacity of the secondary battery in the low charged mode, wherein in the low charged mode, a remaining capacity of the secondary battery is indicated in accordance with the following equation;
RSOC(%)=RC/(FCC/CV)*100,wherein RSOC is the remaining capacity of the secondary battery, RC is a current charge capacity of the secondary battery, FCC is the fully charged capacity of the secondary battery in the low charged mode, and CV is a conversion factor, and wherein the fully charged mode is a first constant-voltage charged mode in which the secondary battery is charged at a first voltage, and the low charged mode is a second constant-voltage charged mode in which the secondary battery is charged at a second voltage which is lower than the first voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification