Charging - EnerSys Nexsys 12NXS26 Technical Manual
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Also See for Nexsys 12NXS26:
- Operation and maintenance instructions (3 pages) ,
- Owner's manual (10 pages)
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CHARGING
Charging the NexSys® blocs correctly is a critical factor to their life expectancy and
performance, failure to do so will result in premature failure. To ensure that the NexSys
blocs are correctly charged, EnerSys® has developed a fast charge algorithm for cyclic
applications to rapidly and safely charge this technology of blocs. EnerSys has a full range
of chargers available that can be purchased to be used with your NexSys bloc.
Charging must only be carried out where adequate ventilation is available and must not be
carried out in confined spaces. Refer to EN 62485-3 section 6.
NexSys blocs can be quickly charged with approved EnerSys NexSys & NexSys+ chargers.
Figures 2 and 3 below show their exceptional fast charge characteristics at varying levels of
DOD and inrush currents.
TIME TO RETURN 80% OF DISCHARGED Ah AS A FUNCTION OF DEPTH OF DISCHARGE &
3.5
3
2.5
2
1.5
1
0.5
0
0%
10%
Figure 2 – Recharge time - return 80% of discharged Ah's
As an example, consider a 100Ah bloc discharged by 60Ah (to 60% Depth of Discharge),
leaving residual capacity of 40Ah. 48Ah will be returned after 0.8hrs of charge with inrush
current 0.6C5A.
TIME TO RETURN 100% OF DISCHARGED Ah AS A FUNCTION OF DEPTH OF DISCHARGE &
7
6
5
4
3
2
1
0
0%
10%
Figure 3 – Recharge Time – return 100% of discharged Ah's
RECHARGE CURRENT
30%
20%
40%
50%
% DEPTH OF DISCHARGE
RECHARGE CURRENT
20%
30%
40%
50%
% DEPTH OF DISCHARGE
12
NexSys Technical Manual
0.2C /C Amps
5
6
0.32C /C Amps
5
0.4C /C Amps
5
6
0.5C /C Amps
5
6
0.6C /C Amps
5
6
0.7C /C Amps
5
6
70%
60%
80%
0.2C /C Amps
5
6
0.32C /C Amps
5
0.4C /C Amps
5
6
0.5C /C Amps
5
6
0.6C /C Amps
5
6
0.7C /C Amps
5
6
60%
70%
80%
90%
6
90%
100%
6
100%
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