Bts Connection - Sensata dimensions 12NP18 Owner's Manual

BTS Connection

Charger operation with a battery temperature sensor, or BTS, cable is required. The BTS measures the battery
temperature and automatically adjusts the charger output for the fastest and safest charge.
Lead-Acid
When batteries are cold, their chemical reaction is slowed, and the battery will not charge as easily in this condition.
A charge voltage optimized for room temperature will not charge the battery at low temperatures. The temperature
sensor cable allows the charger to increase the charge voltage for optimum charging at low temperatures.
When batteries are hot, their chemical reaction is accelerated, and the batteries absorb energy too readily. A charge
voltage optimized for room temperature will tend to overcharge the batteries and cause gassing. The BTS will cause
the charger to decrease the charge voltage to a safe level.
The charger will switch to a "warm battery" mode in which the charger will only provide a float voltage when the
batteries are between 50°C/122°F and 60°C/140°F. If the battery temperature continues to rise over 60°C/140°F
the charger will shut off. The charger will resume charging in the "warm battery" mode when the battery cools to
55°C/131°F. The charger will resume normal charging when the battery cools to 45°C/113°F.
LFP
Lithium Iron Phosphate (LFP) batteries should not be charged at temperatures less than 0°C/32°F as this may
permanently reduce the battery capacity. The Dimensions inverter/charger can support different profiles or modes
for cold charging. The charger can be set to shut down once it reaches the cold shutdown threshold or it can be set
to ignore (not use) the cold shutdown threshold.
NOTE: If a user has a battery with a heater, the user should choose profiles with cold shutdown disabled or "not-
used." Ignoring the shutdown will allow the charger to supply voltage to the battery heater (and any other connected
DC load). The current will still be limited to 0.1C so most DC loads should still not be used.
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12NP Manual