Charging system for battery-set
First Claim
1. A charging system for an assembled battery, comprising:
- temperature measuring means for detecting a temperature of a battery;
charging means having charging current as a variable output, said charging means charging the battery;
operation means for obtaining time variation relative to battery temperature; and
control means for controlling charging current of the charging means along first, second and third periods in charging the battery,wherein in the first period, the charging means applies a predetermined charging current, said first period ending when said operation means detects a predetermined time variation;
in the second period, said control means performs a feedback control so that said time variation is kept same as in an end of the first period, said second period ending when the control means receives a signal from at least one of the charging means and the operation means; and
in the third period, a charging current equal to or smaller than the charging current is applied at an end of the second period.
1 Assignment
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Accused Products
Abstract
An object is to provide a charging system in which a battery can be charged in a fully charged state or close to the fully charged state while preventing performance deterioration of a battery due to heat generated during charge. A charging system 1 for a battery-set of the invention includes a temperature detecting device 15, a charging device 12 and a control device 13 for controlling the charging device 12 based on a battery temperature. The control device 13 carries out a temperature feedback charge with “a quantity function of a temperature” (ΔT/Δt) as a target value (Y). With the system, it is possible to charge the battery in the fully charged state or close to the fully charged state while preventing the performance deterioration of the battery due to the heat generated during the charge.
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Citations
16 Claims
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1. A charging system for an assembled battery, comprising:
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temperature measuring means for detecting a temperature of a battery; charging means having charging current as a variable output, said charging means charging the battery; operation means for obtaining time variation relative to battery temperature; and control means for controlling charging current of the charging means along first, second and third periods in charging the battery, wherein in the first period, the charging means applies a predetermined charging current, said first period ending when said operation means detects a predetermined time variation; in the second period, said control means performs a feedback control so that said time variation is kept same as in an end of the first period, said second period ending when the control means receives a signal from at least one of the charging means and the operation means; and in the third period, a charging current equal to or smaller than the charging current is applied at an end of the second period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification