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Nickel-Hydrogen Rechargeable Cells

Nickel-Hydrogen Rechargeable Cells

Fields of application:

  • Space and rocket equipment
  • Deep-water immersing apparatus

Design

Nickel-hydrogen rechargeable cells were developed and produced firstly in the world in NIAI “Istochnik”. Nickel-hydrogen rechargeable cell represents the sealed alkaline rechargeable cell combining in itself the traditional nickel-oxide electrode and gas hydrogen electrode.

 

 

 

The main current-forming process is described by the equation:

Ni (OH)2      NiOOH + 1/2 2

-40, -60, -100

Potassium hydroxide (KOH) is the electrolyte in nickel-hydrogen rechargeable cell. When charging at hydrogen plate hydrogen which is accumulated in the free cell volume, is evolved rising its internal pressure. Thereat, this pressure is directly proportional to the given charge capacity. When discharging hydrogen is electrocatalytically ionized at hydrogen plate and the pressure is decreased.

Technical Advantages

  • Sealingness
  • Serviceability at any space position
  • Automatic control of charge state degree
  • Stability to mechanical loads

In NIAI “Istochnik” the rechargeable cells and batteries of any intention, with any voltages and capacities under customer’s demands can be developed and manufactured.

Type -40 -50 -100
Nominal capacity, h 40 50 100
Factual capacity, h 45 54 110
Power consumption, Wh 58,5 70,2 125
Max pressure of hydrogen, MP 9 11 11
Safety factor 2,5 2,5 2,5
Overall dimensions (diameter height), mm 70x170 70x185 90x274
Weight, kg, not more 1,1 1,2 3,2
Specific energy, Wh/kg 50,8 58,5 40
Working temperature, ° 0... + 30   -20 ... + 30   0... + 30
Self-discharge at 20° (24 h/72 h), % 30/40 30/40 30/40
Charging current (mean/max), 10/2 12/30 25/50
Discharging current (mean/max), 10/30 12/50 25/100
Current of discharge (in pulse of up to 1 min), 80 120 250
Service life, years/cycles
) discharge depth up to 80 %
) discharge depth up to 25%
 5—7/3000  
5/500
3/17000
8-10/3000  
10/1000
5/28000
5/3000
5/500
3/17000

Nickel-Hydrogen Batteries

Battery 24 -40
  24-40 28-40
Nominal capacity, h 40 40
Nominal voltage, V 30 35
Weight, kg 34 40
Charge/Discharge current, 8/23 10/25
Charging Control Pressure sensors and thermal relay
Service life, years 5 5