5.3. Discharge
5.3.1. Discharge current
The maximum current in
continuous discharge is 2 C
5
A.
If necessary, the monoblocks must
be cooled to limit heating
(electrolyte temperature < + 60°C).
Peak discharges of short duration,
less than or equal to 10 sec, up
to a current of 5 C
5
A are
permitted according to the state
of charge and the minimum
acceptable voltage of the
monoblocks.
5.3.2. Voltage in discharge
The voltage level during
discharge depends on the
current drawn on the battery,
and the temperature.
The rated capacity of STM
monoblocks is set at + 20°C
for an end voltage of 5 V.
In practice, STM monoblocks can
be very deeply discharged.
Occasional polarity inversion will
not harm the monoblocks.
However, this polarity inversion
must remain exceptional to avoid
water consumption not taken into
account by topping-up.
The table on the right shows
general rules and voltages:
17
STM 5-100 MR and MRE
STM 5-140 MR
Constant
200 A
270 A
Peak (10 s)
500 A
680 A
Maximum discharge currents
Current
Capacity measured at
End voltage
in operation
0.2 C
5
A
5.0 V/monoblock
4.9 V/monoblock
1 C
5
A
4.5 V/monoblock
4.4 V/monoblock
2 C
5
A
4.2 V/monoblock
4.0 V/monoblock
End voltages in discharge
Summary of Contents for STM 5-100
Page 1: ...Technical manual installation operation and maintenance for Ni Cd STM MR MRE monoblocks type ...
Page 23: ...Appendix 1 20 Monoblock STM 5 100 MR G RD equipped Positive left Filling right ...
Page 24: ...21 Appendix 2 Monoblock STM 5 100 MRE G RD equipped Positive left Filling right ...
Page 25: ...Appendix 3 22 Monoblock STM 5 140 MR G RD equipped Positive left Filling right ...
Page 26: ...Appendix 4 23 Monoblock STM 5 140 MR D RG equipped Positive right Filling left ...