CHARGE CONTROLLER FOR VEHICLE AND METHOD OF CHARGE CONTROL

• Main Author: IZUMI JUNTA
• Format: Patent
• Language: English
• Published: 29.11.2012
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY

PROBLEM TO BE SOLVED: To realize an increased travelable distance during an EV travel as well as a protection of a power storage device by correctly detecting a full charge of a power storage device when charged externally.SOLUTION: A charge controller, by dividing a maximum voltage among voltages between a plurality of terminals corresponding to a plurality of respective battery blocks by the number of the battery blocks corresponding to the maximum voltage, calculates average voltage value of battery sells included in the corresponding battery blocks. When it is detected that any of the voltage value among a plurality of the battery cells exceeds a prescribed value, an average value is output by adding an offset value based on the prescribed value to the average value obtained above. A charge controlling part obtains a real average value by performing an averaging processing to the average value by using a sampling value of the average value to which the offset value is added. Based on this real average value, a fully charged state of the power storage device is determined. The charge controlling part variably sets the number of samples of the average value used for the averaging processing according to frequencies of an AC power supplied by an AC power supply.