Specifications

MARATHONNORCO AEROSPACE, INC.
NICKEL-CADMIUM AIRCRAFT BATTERIES
24-34-00
Page 3
APR 15/06
Charge, Discharge and overcharge equations:
Positive plate
Charge →
Discharge ←
2Ni(OH)
2
+ 2(OH)
-
→ 2Ni OOH + 2H
2
O + 2e
-
(Nickel Hydroxide) ← (Nickel Oxy Hydroxide)
Overcharge
4(OH)
-
→ O
2
+ 2H
2
O + 4e
-
Negative Plate
Charge →
Discharge ←
Cd(OH)
2
+ 2e
-
→ Cd° + 2(OH)
-
(Cadmium Hydroxide) (Cadmium)
Overcharge
4H
2
O + 4e
-
→ 2H
2
+ 4(OH)
Overcharge (Net Cell Reaction)
4e
-
2H
2
O → 2H
2
+ O
2
Figure 2
TYPICAL CONSTANT CURRENT DISCHARGE CURVES
Constant Current
Discharge For
Typical 20 Cell
Battery: Rate a
parameter