| 摘要 |
<p>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 valueΔT 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 valueΔT, 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 valueΔT at that time is higher than the prescribed value.</p> |
