Battery Technology Crash Course by Slobodan Petrovic

Author:Slobodan Petrovic
Language: eng
Format: epub
ISBN: 9783030572693
Publisher: Springer International Publishing

3.5 Failure Modes

One of the most important aspects of lead–acid batteries is the knowledge of possible modes of failure and how to prevent them through design and proper use.

The electrolyte loss occurs in the flooded or non-sealed batteries in the overcharge phase and it is increased at high temperature and high charging rates. In sealed batteries, high charge rates cause an increase in temperature and pressure. If pressure exceeds certain preset value a valve opens and gas is released, along with some electrolyte. The loss of electrolyte means that liquid level will be lowered, exposing the top part of the plates above the electrolyte. This is shown schematically in the cell sketch in Fig. 3.3. The loss of electrolyte clearly leads to lower performance and the best way to prevent it is to properly charge the battery and avoid overcharge.

Fig. 3.3Schematic of battery cross section showing loss of electrolyte

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