Krusik’s open prism-shaped Ni-Cd batteries belong to the group of batteries with alkaline electrolyte. The label prism-shaped is telling of the battery shape. According to the construction of the electrode, the battery belongs to the group of batteries with pocket plates, while the battery casing is made of steel or propylene. According to the discharge regime the KPL type batteries belong to the group of batteries that are discharged using the currents up to 0.5 C5 (A).
TERMS AND DEFINITIONS
Nominal voltage of the battery (operating voltage) is 1.2 V. In order to achieve higher values of voltage than 1.2 V, batteries are connected serially.
Nominal capacity of the battery is the five-hour capacity (C5) at the temperature 20 ± 5°C, stated as electricity in ampere hours (Ah) and labeled C5, Ah.
Nominal charge/discharge current is: I=0.2 C5A. Time of charging the battery with nominal current is 7.5-8 hours which makes the battery fully charged. The charging factor is: F=150-160% C5Ah.
Time of discharging with nominal current I=0.2 C5A to the voltage of 1.0 V/cell is 5 hours at the minimum. Electrolyte in the battery is the KOH (potassium-hydroxide) solution in distilled water, with density 1.2 ± 0.01g/cm3.
Typical discharge curves for KPL type Ni-Cd cell at 20°C