Operation; Operating Temperature - EnerSys Nexsys 12NXS26 Technical Manual

NexSys Technical Manual
Use special coding systems for maintenance free blocs for the charging plug-and-socket
devices to prevent accidental connection to the wrong type of charger. Never directly
connect an electrical appliance (for example: warning beacon) to a part of the bloc. This
could lead to an imbalance of the cells during the recharge, i.e. a loss of capacity, the risk of
insufficient discharge time, damage to the cells and VOIDS THE BLOC WARRANTY.
Charge the bloc before commissioning. Only blocs with the same state of charge should be
connected together.
The specified torque loading for the bolts/screws of the end cables and connectors are
detailed in the Table 3.

OPERATION

EN 62485-3 "Safety requirements for secondary batteries and battery installations - Part
3 traction batteries" and IEC 62485 Safety requirements for secondary batteries and battery
installations – Part 3: Traction batteries are applicable to this product range. The nominal
operating temperature is 25°C/77°F. The optimum lifetime of the bloc depends on the
operating conditions (temperature and depth of discharge).
The ambient temperature range of use for the bloc is between +5°C/41°F and +45°C/113°F,
outside of this range must be approved by the EnerSys Technical Department. Optimal bloc
life is obtained with the bloc at a temperature between 25-30°C or 77-86°F. Higher
temperatures shorten the life of the bloc (according to IEC 1431 technical report), lower
temperatures reduce the available capacity. The upper ambient temperature limit is
+45°C/113°F and blocs should not be operated above this temperature. The capacity of the
battery changes with temperature and falls considerably under 0°C/32°F. The optimum
lifetime of the battery depends on the operating conditions (moderate temperature and
moderate depth of discharge – e.g. 40-60% C5/C6). It is mandatory that the depth of
discharge does not exceed 80% of the nominal C5 or C6 capacity. Figure 4 and Table 8
show relationship between depth of discharge and cycle life.
The battery obtains its full capacity after about 3 charging and discharging cycles.

OPERATING TEMPERATURE

NexSys® batteries and EnerSys® approved chargers are designed for use within an ambient
temperature range of +5°C/41°F and +45°C/113°F. For use outside this range, you should
consult with EnerSys APPLICATION ENGINEERING AUTHORITY. Applications outside the
recommended temperature range will be considered but it will be mandatory to use an
EnerSys charger with communication capability (NexSys+) and the battery must be
equipped with Wi-iQ® monitoring device to manage the charge profile in accordance with the
battery temperature.
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