Industrial Batteries & Energy Storage
sales@regalelectro.com.au
Chapter 1 Overview
1.1 Measuring Battery Wear
For determining battery wear, first measure internal resistance in a new or good battery.
The graph below shows the relation between storage capacity and initial value of internal resistance
in a lead-acid battery. ‘CS’, ‘HS’ and ‘MSE’ denote lead-acid battery types.
Internal resistance of an MSE (sealed stationary lead-acid battery) can be read at approximately
1mΩ (100Ah) and approximately 0.13mΩ (1000Ah). Under conditions of battery wear, internal
resistance rises to 1.5-2 times its initial value.
For an MSE (sealed stationary lead-acid battery) when internal resistance reaches
approximately 1.5 times its initial value, a warning will be issued. Wear (failure)
values vary by manufacturer.
Initial values of internal resistance may vary among batteries with the same
capacity, depending on battery type of manufacturer.
Internal resistance warnings and failures vary by manufacturer.
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