Title:
BATTERY CHARGER
Document Type and Number:
Japanese Patent JP3945194
Kind Code:
B
Abstract:
PROBLEM TO BE SOLVED: To provide a battery charger, capable of eliminating lack of charging because of charging running down early, resulting from the phenomenon of a temperature rise increases immediately after charging start, due to a temperature gradient between battery temperature and ambient temperature, when the ambient temperature is higher than the battery temperature, and of positively discriminating full charging.
SOLUTION: This battery charger includes a battery temperature detecting means 2A which detects the battery temperature, a microcomputer 50 which computes and stores a temperature increase value ΔT per prescribed period, based on the output of the battery temperature detecting means 2A and stores a map, on which a charging current acceptable value is mapped capable of charging; while suppressing a temperature rise value of a battery, based on the battery temperature and the temperature rise value ΔT, and a cooling fan 6 which cools down the battery. The cooling fan 6 is activated for a prescribed period of time prior to a charging process, and the map is selected, based on whether or not a temperature rise value ΔT at that time is higher than the prescribed value.
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Inventors:
Aradate, Takahisa
Takano, Nobuhiro
Takano, Nobuhiro
Application Number:
JP2001000212972
Publication Date:
April 20, 2007
Filing Date:
July 13, 2001
Export Citation:
Assignee:
HITACHI KOKI CO LTD
International Classes:
H02J7/10; H01M10/44; H01M10/50; H02J7/04; (IPC1-7): H02J7/10; H01M10/44; H01M10/50; H02J7/04
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