CHARACTERISTIC EVALUATING METHOD AND CHARACTERISTIC EVALUATING DEVICE FOR ALKALINE ZINC STORAGE BATTERY

摘要

PROBLEM TO BE SOLVED: To prevent an apparatus from being stained by judging a battery to be abnormal due to internal short circuit arising and stopping the use of the judged abnormal battery as a power supply for the apparatus, if the value of current increases in the course of constant-voltage charging. SOLUTION: After a reference value IP is inputted and set in a comparator 4, a timer 6 and a timer 7 are reset so that they operate a time T1 after the start of charging and a time T2 after the start of charging, respectively, then their clocking motion is started while charging is started by turning on a constant-voltage power supply 1. When the time T1 is reached after the start of charging, a then detected current value I0 of an ammeter 2 is sent to the comparator 4 and the timer 6 operates to close a switch SW. The detected current value I0 is compared with the reference value IP by the comparator 4 and a comparison result is sent to a display 5. If internal short circuit is heavy in an alkaline zinc storage battery B, the comparison result becomes I0 =IP, 'Abnormal battery', 'Short-circuited battery' or the like is displayed in characters, and a current-interrupting circuit 3 is operated by a direction of the comparator 4 to stop charging. Thus, useless charging work can be avoided.