Chapter Three Operation And Maintenance; Operation Condition; Capacity - Narada MPG Series Operation Manual

NARADA POWER SOURCE CO., LTD

Chapter Three Operation and Maintenance

1. Operation Conditions
Ambient temperature: MPG series optimum temperature is 15℃～25℃, the higher and
lower temperatures will impact battery performance
Operate status
Discharge
Charge
Storage
Ambient humidity：≤95％
Cabinet ventilation conditions: meet the standard EN 50272-2:2001

2. Capacity

2.1.Capacity of battery
The capacity of battery is the capacity that battery can be discharged on the established
conditions, expressed as signal C. The usual unit of capacity is ampere hour, abbreviate AH.
The capacity can be expressed in Rated Capacity or Actual Capacity. The Rated Capacity of
MPG batteries please see Table 1-1. The Actual Capacity is the product of the discharge current
and the discharge time, the unit is AH.
2.2. The Influence Factor of the Actual Capacity
The actual capacity is mainly related with the positive and negative active materials and their
utilization ratio. The utilization ratio of the materials is mainly influenced by the DOD, the
structure of the battery and manufacture technology. In using process the factors that influence the
actual capacity are discharge rate, depth of discharge, end voltage and temperature.
2.3. Discharge Rate
The discharge rate is often described as hour-rate and multiple rates.
If the discharge rate is higher and the discharge current is larger, then the discharge time is
shorter, and the capacity which can be discharged is less.
2.4. End voltage
The end voltage is the lowest working voltage below which the battery can't be discharged
any more or it will harm the battery. Usually the 10hr rate end voltage of MPG battery is
Operation temperature range
Temperature range
-40℃～50℃
-20℃～50℃
-20℃～40℃
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Operation Manual for MPG Series
Optimum temperature
15℃～25℃
15℃～25℃
15℃～25℃