Battery water loss plays a significant role in battery failures under certain applications. Three counter measures that can be applied to a battery or cell without changing the plate stack will be addressed in this presentation:
- improving battery recombination in flooded batteries
- forcing recombination by catalysts
- improving tightness of automotive battery plugs
To quantify the first topic, Frötek conducted investigations to evaluate the effect of valves in flooded batteries. For this, half of the battery cells were equipped with valves and the other half was used without valves. In several tests, valves were switched. It was found that increasing the pressure leads to significant water loss.
To address the topic of forced recombination the benefit of micro-catalysts in the recombination of hydrogen and oxygen was investigated and quantified. Battery gases were applied to micro-catalysts in both a short- and long-term test. It was shown that effectiveness is significant.
Both measures mentioned above address the recombination. Nevertheless, general tightness of sealings also plays a key role as well. Typical sealing material becomes loose when applied in a hot climate. Special materials have been identified, and the tightness proven in a well-known automotive test.
Ingo Koch studied Chemical engineering at the Technical University of Clausthal, Lower Saxony, Germany. For 18 years, he worked at Johnson Control Power Solutions (now Clarios) in the R&D department with dissimilar roles and responsibilities, the final being Senior Manager Requirements Analysis. Since 2018, Ingo has been with Frötek-Kunststofftechnik GmbH, Niedersachsen Germany, and is the Technical Director responsible for battery components.