Aircraft Battery 20GNG40(24V/40Ah) , substitution of Russian aviation battery K-8 aircraft, Russian Mi-17/171

Aircraft Ni~Cd Battery

Operation &a; Maintenance Technical ManuaI

1 Application

Ni-Cd aircraft battery is used as the boarding standby power supply for the airplanes. In case of breakdown, it can start the engine directly and provide 24V DC power. The battery can be stored at the teerature of -55 °C 〜+60 °C for a short period, and after being charged at 25°C±10°C, the battery can be operated in high altitude of 18000m (11.1852mile) , supplying power at the teerature of -10°C 〜+50°C.

2 Construction and electrochemical processes

2. 1 Construction

The battery is consisted of 20 sintered Ni-Cd cells which are connected in series by nickel plating linlcers and they are mounted in a stainless steel case which has a rigid construction and high mechanical strength. There is special electrical equipment outside the case in convenience of linldng with the electrical connector on the airplane. It can assure flying safe and reliable.

In the overall reaction above, it is clearly teen that the water is releasing during charge and absorbing during discharge. So the electrolyte level has changes all the time. 

• Technical parameters and electr ical performance

2. 1 23 °C ± 5 °C D i scharge performance(Reh Table 1)

［(Table 1)

It—means the, battery nominal capacity. So 0.5 ItA is equal to 0.5x I_tA. Take 20GNC40 as an. exale, the nominal capacity is 40A, then 0.5 ItA is 20A.

3.1. 1 In order to make sure the performance/ the best operation teerature is