414429 Battery Nicad,W/Cvh150Kh Cell

Overview

The 151CH1 Saft nickel-cadmium battery consists of a box (020), containing 20 individual cells CVH150KH. These cells are connected in series to obtain 24 V nominal. Individual cells are enclosed in a polyamide container that provides insulation, allowing them to be fitted side-by-side in the battery box. Interconnection of cells is via rigid, highly conductive, nickel-plated copper links (130 to 150). Each link is held in place by nickel-plated copper nuts (100) on the cells’ terminals. Inside the battery box, individual cells are held in place by partitions, liners and spacers (220), and a cover (030). The terminals (110) connects the battery to the aircraft DC power.

NOTE: ALL NICAD BATTERIES ARE UNCHARGED

Features

The batteries are connected to the aircraft system:

• According to the aircraft manufacturer, to start the engine or the APU.
• On the ground, to provide power before electrical power is supplied to the aircraft systems.
• In flight, if a malfunction or a failure occurs in the power supply system.
  • Type of cells : CVH150KA
  • Number of cells : 20
  • Nominal voltage : 24 V
  • Rated capacity C1Ah (Ah) : 15 Ah
  • Charge or discharge current 1 C1A : 15A
  • Charge current 0.5 C1A : 7.5 A
  • Charge current 0.1 C1A : 1.5A
  • Electrolyte : Solution of KOH
  • Electrolyte level (mm) : 20 mm (0.79 in)
  • Consumable volume of electrolyte per cell : 15 cm3 (2.44 in3)
  • End of charge voltage : 1.55 V / per cell
  • End of life criterion in % : 100%
  • End of life criteria in hour or minutes : 1 hour
  • Battery maximum weight : 15.2 kg (33.5 lbs)
  • Battery terminals : Two M8 terminals

Benefits

• The battery is charged on the aircraft by an on-board charger.
• The charge control thermistor provides a signal to the charger to compensate the charge according to the battery temperature.
• The thermostat will cut off the charger if the battery temperature exceeds a safe operating limit.
• The battery plates store electrical power supplied by a charging source, and supply power when the battery is connected to a load circuit, i.e. when it discharges.

Aircraft Application

• Airbus Helicopters (Eurocopter) : EC120 / EC130 / AS350 / AS355

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