Four common problems in the charging and use of batteries for mining electric locomotives

Part of the performance degradation of the battery is the natural result of use and aging, and the other part is the acceleration of its degradation due to lack of maintenance, harsh use environment, and so on. Some performances of rechargeable batteries for mining electric locomotives can be restored by external methods, but there are still some problems that are difficult to overcome in use.

1. Short-circuit batteries. Battery manufacturers often cannot explain why certain batteries show high leakage rates or electrical short-circuits when the batteries are still in a relatively new state. The suspicious reason is that foreign particles and impurities may be mixed in the battery during the manufacturing process; the other is that the rough spots on the electrode cause transverse damage to the separator.

2. The matching of the battery, the "weak" battery is faster than the "strong" battery due to its smaller capacity. This imbalance in the discharge process causes the polarity of the battery to reverse when the "weak" battery is discharged through a low voltage. During charging, the "weak" battery first enters the heating and overcharging state, while the stronger battery can still be charged normally without heating. In these two cases, the "weak" battery becomes more "weak". Serious mismatch.

3. High self-discharge rate, all kinds of batteries have self-discharge, but improper use will promote the development of this state. The self-discharge rate shows an asymptotic law, the highest discharge rate appears just after charging, and then gradually decreases. Nickel-cadmium batteries exhibit a high self-discharge rate. After a new nickel-cadmium battery is charged, its power level will be reduced by about 10% during the first 24 hours. The self-discharge rate of nickel-cadmium batteries is about 30% greater than that of nickel-hydrogen batteries.

4. Loss of electrolyte, although the battery is sealed, some electrolyte will be lost during its service life, especially if excessive gas pressure is generated due to improper charging and gas emission occurs, then on nickel-cadmium batteries The spring-loaded exhaust gasket may be difficult to reclose properly, causing white powder to accumulate around the gasket, and the loss of electrolyte will eventually reduce the battery capacity.

 

The above are the four common problems in the use of rechargeable batteries for mining electric locomotives. As long as you install and use them in the correct way, you can avoid the problems with the greatest ability.