Thermal recovery of galvanic cells. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Chargers, batteries, galvanic cells
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Batteries and galvanic cells are widely used to power various electronic devices. Today, their production is millions of pieces per year. Manufacturers, as a rule, do not indicate their electrical capacity. This is due to the fact that during storage and especially during operation, the internal resistance of cells and batteries continuously increases, leading to a significant decrease in the power delivered to the load.
It has been experimentally established that after a short heating of a galvanic cell to a temperature of 80...90°C, its internal resistance decreases significantly. The thermal regeneration procedure is easy to carry out by placing the element in a vessel filled with freshly boiled water. It should be heated for 4 ... 5 minutes and after that it can be used for its intended purpose. Of course, this does not mean that after such a procedure the element will be like new, but it is still possible to restore its performance for a while.
In addition, it is useful to subject galvanic cells to thermal regeneration at the beginning and during operation. As practice shows, in this case, the performance of the elements increases by about 20 ... 30%.
The recovery process can be monitored using a digital voltmeter by increasing the voltage at the contacts of the element. As soon as the voltage stops increasing, heating is stopped.
This recovery method can be useful when a power source is urgently needed, for example, in extreme conditions for a communication session (the old galvanic cells are discharged, and there is nowhere to get new ones).
Author: A.Polykovsky, Moscow
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