EnerSys OutBack POWER NorthStar NSB BLUE+ Series, Руководство пользователя

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NorthStar NSB BLUE+
Batteries
900-00264-01-001 Rev A
17
Temperature Compensation
Battery performance will change when the temperature varies above or below room temperature
(77°F or 25°C). Temperature compensation adjusts the charging to correct for these changes.
When a battery is cooler than room temperature, its internal resistance goes up, the voltage
changes more quickly, and the charger reaches its voltage set points more easily. However, it
will not deliver all the required current and the battery will tend to be undercharged. Conversely,
when the battery is warmer than room temperature, its internal resistance goes down, the
voltage changes more slowly, and the charger does not reach its voltages as easily. It will
continue to deliver energy until the set points are reached, but this tends to be far more than
required. The battery will be overcharged. (See
Improper Use on the next page.)
To compensate for these changes, a charger used with the NorthStar NSB BLUE+ ® battery
must have its voltages raised by a specified amount for every degree below room temperature.
They must be similarly lowered for every degree above room temperature. This factor is
multiplied if additional batteries are in series. Failure to compensate for significant temperature
changes will result in undercharging or overcharging which will shorten battery life.
NorthStar NSB BLUE+ ® Required Compensation
The factor is 2 mV per cell (0.024 Vdc or 24 mV per battery) per degree C above or below room
temperature (77°F or 25°C) when the battery is regularly cycled.
Remote Temperature Sensor
OutBack inverter/chargers and charge controllers are equipped with the Remote Temperature
Sensor (RTS) which attaches to the battery and automatically adjusts the charger settings.
When the RTS is used, it should be placed on the battery sidewall, as close to the center of
the battery (or to the center of the bank) as possible. See Figure 12. The RTS should be
checked periodically.
The charger determines the RTS compensation factor. All OutBack chargers are preset to a
compensation of 5 mV per cell. Currently, only the FLEXmax 100 and SkyBox products can
make system-wide adjustments to
permit
the 2 mV setting. If an RTS is not present or if a
different charger is in use, temperature compensation may not work correctly. It may be
necessary to adjust the main charger settings manually.
Figure 12 Remote Temperature Sensor Location
Lock
Washer
RTS