Charging current setting method, a charging method, a charging apparatus, and an actuator
First Claim
1. A charging current setting method for a secondary battery which repeats a predetermined period including a discharge period and a charge period, comprising:
- an upper limit temperature recognition step which recognizes an upper limit temperature allowed by the secondary battery;
an actual temperature recognition step which recognizes an actual temperature of the secondary battery;
a maximum power recognition step which recognizes a maximum power according to heat quantity which the secondary battery can allow during the charge period based on a difference between the upper limit temperature and the actual temperature, a thermal resistance of the secondary battery, a length of the predetermined period, and a length of the charge period; and
a current setting step which sets current to be flown when charging the secondary battery to be an upper limit value or less by recognizing the upper limit value of the charge current with respect to the secondary battery based on a relational expression or an endothermic and exothermic characteristics map indicating a relation of an exothermic amount or an endothermic amount of the secondary battery with respect to current, and the maximum power.
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Accused Products
Abstract
A charging current setting method includes an upper limit temperature recognition step which recognizes an upper limit temperature of the secondary battery (11), an actual temperature recognition step which recognizes an actual temperature of the secondary battery (11), a maximum power recognition step which recognizes an maximum power according to a heat quantity which the secondary battery (11) allows during a charge period based on a difference between the upper limit temperature and the actual temperature, a thermal resistance of the secondary battery (11), and a length of a predetermined period and the charge period, and a current setting step which sets a charge current to be an upper limit value or less by recognizing the upper limit value of the charge current of the secondary battery (11) based on an endothermic and exothermic characteristics map of the secondary battery (11) with respect to current and the maximum power.
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Citations
9 Claims
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1. A charging current setting method for a secondary battery which repeats a predetermined period including a discharge period and a charge period, comprising:
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an upper limit temperature recognition step which recognizes an upper limit temperature allowed by the secondary battery; an actual temperature recognition step which recognizes an actual temperature of the secondary battery; a maximum power recognition step which recognizes a maximum power according to heat quantity which the secondary battery can allow during the charge period based on a difference between the upper limit temperature and the actual temperature, a thermal resistance of the secondary battery, a length of the predetermined period, and a length of the charge period; and a current setting step which sets current to be flown when charging the secondary battery to be an upper limit value or less by recognizing the upper limit value of the charge current with respect to the secondary battery based on a relational expression or an endothermic and exothermic characteristics map indicating a relation of an exothermic amount or an endothermic amount of the secondary battery with respect to current, and the maximum power. - View Dependent Claims (2, 3, 4, 5)
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6. A charging method for a secondary battery which repeats a predetermined period including a discharge period and a charge period, comprising:
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an upper limit temperature recognition step which recognizes an upper limit temperature allowed by the secondary battery; an actual temperature recognition step which recognizes an actual temperature of the secondary battery; a maximum power recognition step which recognizes a maximum power according to heat quantity which the secondary battery can allow during the charge period based on a difference between the upper limit temperature and the actual temperature, a thermal resistance of the secondary battery, a length of the predetermined period, and a length of the charge period; a current setting step which sets current to be flown when charging the secondary battery to be an upper limit value or less by recognizing the upper limit value of the charge current with respect to the secondary battery based on a relational expression or an endothermic and exothermic characteristics map indicating a relation of an exothermic amount or an endothermic amount of the secondary battery with respect to current, and the maximum power; and a charging step which charges the secondary battery;
with the current set in the current setting step.
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7. A charging apparatus for a secondary battery which repeats a predetermined period including a discharge period and a charge period, comprising:
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a charging unit which supplies current to charge the secondary battery; a control unit which controls the current supplied to the secondary battery by the charging unit; and an input unit, wherein the control unit comprises, an upper limit temperature recognition unit which recognizes an upper limit temperature of the secondary battery based on a value input by the input unit, a state recognition unit which recognizes a state of the secondary battery, an actual temperature recognition unit which recognizes an actual temperature of the secondary battery based on the state of the secondary battery recognized by the state recognition unit, a maximum power recognition unit which recognizes a maximum power according to heat quantity which the secondary battery can allow during the charge period based on a difference between the upper limit temperature and the actual temperature, a thermal resistance of the secondary battery, a length of the predetermined period, and a length of the charge period, an endothermic and exothermic characteristics information storing unit which stores a relational expression or an endothermic and exothermic characteristics map indicating a relation of an exothermic amount or an endothermic amount of the secondary battery with respect to current, and a current setting unit which sets current supplied from the charging unit to be an upper limit value or less by recognizing the upper limit value of the charge current with respect to the secondary battery based on the relational expression or the endothermic and exothermic characteristics map, and the maximum power. - View Dependent Claims (8, 9)
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Specification