A-A-52417 Battery, Storage: Alkaline, Nickel-CadmiumThis CID covers the requirements for nickel-cadmium storage batteries primarily for service in military vehicles, starting of missile ground power equipment, radio operation, and as a source of electrical energy for operating vehicular accessories control mechanisms. The nickel-cadmium batteries have a wide tolerance to temperature extremes. They require less derating at low temperatures than lead acid units. Since the specific gravity of the battery electrolyte does not change with the state of charge, they are not susceptible to freezing once a discharge is underway. Nickel-cadmium batteries can operate from plus 200 degrees Fahrenheit (degrees F) to minus 65 degrees F without damage or without the threat of freezing.

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A-A-52417A

2.1.1 Cell sealing compound. The cell sealing compound shall be alkali resistant, shall not shrink or separate from adjoining surfaces, and shall maintain an unbroken seal throughout an ambient temperature range from minus 65 degrees Fahrenheit (°F) to plus 200°F. The individual cells shall be sealed to maintain the seal when subjected to a pressure of two pounds per square inch (psi) throughout the ambient temperature range from minus 65°F to plus 200°F.

2.1.2 Electrolyte. The electrolyte used shall be a solution of potassium hydroxide and deionized or distilled water with a specific gravity of 1.300 + 0.020 at plus 72°F. The electrolyte shall be furnished in the battery (see 2.2.5.1, 2.2.5.2, 2.7.2)

2.2 Design and construction. The battery shall be designed and constructed to the form and dimensions specified in (see figures 1 and 2).

2.2.1 Battery container. The battery container shall be of one piece, monobloc design. The container material shall be a high strength, alkali resistant, non-porous plastic which is resistant to temperatures ranging from minus 65°F to plus 200°F. The battery container shall conform to figures 1 and 2.

2.2.2 Cover. The cover shall be one piece high strength alkali resistant non-porous plastic. It shall insulate and protect all intercell connections enabling the battery to be submersible. There shall be no exposed intercell connections. The only exposed parts carrying current shall be the positive and negative terminal posts. The cover shall conform to figures 1, 2, and 3.

2.2.3 Terminal posts. Terminal posts shall conform to figure 3.

2.2.4 Corrugation. The sides of the external case shall be corrugated to conform to figure 4.

2.2.5 Handles. Handles shall be provided and shall be so designed to support the battery weight during lifting throughout a temperature range of minus 65°F to plus 200°F. Handles shall conform to figure 5.

2.2.5.1 Metal handles. Metal handles shall be of material that either by itself or when otherwise treated shall resist electrolyte (see 2.1.2). The handle shall show no corrosion or alkali absorption that interferes with performance of its functions. The handles shall operate freely in their retainers. Metal handles shall conform to figure 5.

2.2.5.2 Plastic handles. Plastic handles shall be rope type and if saturated with electrolyte conforming to 2.1.2, shall evidence no rupture, cracks, distortions, or other damage. Plastic handles shall conform to figure 5.

2.2.6 Vent plugs. Vent plugs shall be furnished for each cell and shall be located as shown in figures 1 and 2. The materials for vent plugs shall be non-absorbent and alkaline resistant and shall evidence no rupture, crack, distortions, or other damages. Plugs must be removable by hand without the use of any tool. Vent plugs shall have a gas or pressure release mechanism that is not affected or made inoperative by carbonate deposits. The vent plugs and their release or venting devices must be operative throughout the temperature range of minus 65°F to plus 250°F.