Electric car battery pack charging device and a method
First Claim
1. A battery charging device of an electric car, comprising:
- a battery pack receiving power to charge and discharging to supply power;
a battery charging controller controlling a charging of the battery pack at a constant power, and when a voltage of the battery pack is over a first voltage, controlling a constant current charging process, and after this, each time a peak value of the battery pack is over a second voltage, controlling a sequential reduction of current and performing a constant current charging process, and when the voltage of the battery pack is over a third voltage, controlling a constant voltage charging process at a fourth voltage, and when the charging voltage is over a fifth voltage, controlling a termination of the charging process; and
a battery charger receiving external power according to the control of the battery charging controller, and charging the battery.
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Accused Products
Abstract
Disclosed is a device and method for charging an electric car battery pack that charges by receiving power and discharges to supply power. A battery charging controller controls charging the battery pack at a constant power, and when the voltage of the battery pack is over a first voltage, controls a constant current charging process, and after this, each time a peak value of the battery pack is over a second voltage, controls a sequential reduction of current and performs a constant current charging process, and when the voltage of the battery pack is over a third voltage, controls a constant current charging process at a fourth voltage, and when the charging voltage is over a fifth voltage, controls a termination of the charging process. A battery charger receives external power according to the control of the battery charging controller, and charges the battery.
22 Citations
8 Claims
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1. A battery charging device of an electric car, comprising:
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a battery pack receiving power to charge and discharging to supply power; a battery charging controller controlling a charging of the battery pack at a constant power, and when a voltage of the battery pack is over a first voltage, controlling a constant current charging process, and after this, each time a peak value of the battery pack is over a second voltage, controlling a sequential reduction of current and performing a constant current charging process, and when the voltage of the battery pack is over a third voltage, controlling a constant voltage charging process at a fourth voltage, and when the charging voltage is over a fifth voltage, controlling a termination of the charging process; and a battery charger receiving external power according to the control of the battery charging controller, and charging the battery. - View Dependent Claims (2)
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3. A method for charging a battery pack of an electric car, comprising the steps of:
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(a) charging a battery pack at a constant power and determining whether a voltage of the battery pack is over a first voltage; (b) charging the battery pack at a constant current when the voltage of the battery pack is over the first voltage, and each time a peak value of the voltage of the battery pack is over a second voltage, sequentially reducing the current and charging the battery pack at a constant current; and (c) charging the battery pack at a fourth constant voltage when the voltage of the battery pack is over a third voltage, and terminating the charging process when the charging voltage is over a fifth voltage. - View Dependent Claims (4, 5, 6, 7, 8)
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Specification