Battery charging system and electric vehicle with battery charging system
First Claim
1. A battery charging system comprising:
- a battery charger for charging a battery;
a charging controller for controlling said battery charger;
an external power supply for supplying electric energy to said battery charger to charge the battery; and
a vehicle-carried battery for supplying electric energy to said charging controller;
said charging controller comprising;
failure detecting means for detecting a failure of said external power supply;
temporary charging stopping means for controlling said charging controller to change from a normal power consumption mode to a low power consumption mode and temporarily stopping charging of the battery with said battery charger when a failure of said external power supply is detected by said failure detecting means;
recovery-from-failure detecting means for detecting when said external power supply recovers from the failure; and
charging resuming means for controlling said charging controller to change from the low power consumption mode to the normal power consumption mode and resuming charging of the battery with said battery charger when recovery of said external power supply from the failure is detected by said recovery-from-failure detecting means.
1 Assignment
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Accused Products
Abstract
When a charging control computer energized by an auxiliary battery detects a failure of an external AC power supply based on a change in the level of a failure on/off signal while a battery, mounted as an energy source on an electric vehicle, is being charged by the external AC power supply, the charging control computer stores a charged time up to the failure of the external AC power supply. Then, the charging control computer immediately changes from a normal power consumption mode to a low power consumption mode. When the charging control computer subsequently detects when the external AC power supply recovers from the failure, the charging control computer calculates a new target charging time from an initial target charging time and the charged time. Wasteful power consumption by the auxiliary battery during the failure of the external AC power supply is minimized. After the external AC power supply recovers from the failure, the charging control computer can charge the battery accurately to its fully charged state.
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Citations
14 Claims
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1. A battery charging system comprising:
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a battery charger for charging a battery; a charging controller for controlling said battery charger; an external power supply for supplying electric energy to said battery charger to charge the battery; and a vehicle-carried battery for supplying electric energy to said charging controller; said charging controller comprising; failure detecting means for detecting a failure of said external power supply; temporary charging stopping means for controlling said charging controller to change from a normal power consumption mode to a low power consumption mode and temporarily stopping charging of the battery with said battery charger when a failure of said external power supply is detected by said failure detecting means; recovery-from-failure detecting means for detecting when said external power supply recovers from the failure; and charging resuming means for controlling said charging controller to change from the low power consumption mode to the normal power consumption mode and resuming charging of the battery with said battery charger when recovery of said external power supply from the failure is detected by said recovery-from-failure detecting means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electric vehicle comprising:
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a battery charger for charging a battery with electric energy supplied from an external power supply and generating a failure on/off signal indicative of a failure/non-failure of said external power supply; a charging controller for controlling said battery charger; and a vehicle-carried battery for supplying electric energy to said charging controller; said charging controller comprising; failure detecting means for detecting a failure of said external power supply based on said failure on/off signal; temporary charging stopping means for controlling said charging controller to change from a normal power consumption mode to a low power consumption mode and temporarily stopping charging of the battery with said battery charger when a failure of said external power supply is detected by said failure detecting means based on said failure on/off signal; recovery-from-failure detecting means for detecting when said external power supply recovers from the failure; and charging resuming means for controlling said charging controller to change from the low power consumption mode to the normal power consumption mode and resuming charging of the battery with said battery charger when recovery of said external power supply from the failure is detected by said recovery-from-failure detecting means. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification