INVESTIGATION OF INFLUENCE OF AN AMBIENT TEMPERATURE ON PROBABILITY OF OCCURRENCE OF THERMAL RUNAWAY IN NICKEL-CADMIUM ACCUMULATORS
We have done the cycling of the accumulators: KSX-25, KCSM-33, KCSM-50, KSX-6, KCSM-4, KCSM-3. The charging was implemented at voltages 1.87; 2.2 V for ten hours, and the discharging according to the operation manual for these batteries. For each type of batteries and for each value of the charging voltages were made 800 charge-discharge cycles. It has been established experimentally that a probability of a thermal runaway in these nickel-cadmium accumulators grows with an increase of the ambient temperature. In the low-capacity batteries KCSM-4, KCSM-3 with sintered electrodes thermal runaway was not even at a temperature of 65 °C. In all probability to initiate thermal runaway is important total mass and the total current charge of batteries. In any case, these experimental studies clearly show that the probability of thermal runaway decreases with decreasing batteries capacity at any ambient temperature.