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1
Overview
1.1 Evaluating Battery Deterioration
IMPORTANT
To evaluate whether batteries have deteriorated, rst measure the
internal resistance of a fresh or non-defective battery.
If a battery has deteriorated, the internal resistance will increase
by 50 to 100 percent (value for reference purposes) from its initial
value.
The graph below shows the relation between the amount of battery
charge available and the initial value of internal resistance in a lead-
acid battery. “CS,” “HS,” and “MSE” denote lead-acid battery types
according to Japanese Industrial Standard (JIS).
The internal resistance of an MSE (sealed stationary lead-acid
battery) can be graphically read at approximately 1 m
Ω
(100 Ah)
and approximately 0.13 m
Ω
(1000 Ah).
Internal resistance value
Lead-acid battery capacity
(Ah)
(m
Ω
)
CS
HS
MSE
CS Clad-type stationary
lead-acid battery
HS High-rate-discharge
paste-type stationary
lead-acid battery
MSE Sealed stationary lead-
acid battery
1 Overview
HIOKI BT3554F961-00HIOKI BT3554F961-00
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