NiCd accumulators

They are used as mobile and stationary batteries, mounted in portable boxes or on racks.
High resistance on mechanical workload.
High resistance to electric overcharging and deep discharge.
Minimal self-discharge.
Large number of charge and discharge cycles.
Operation in the temperature range of-40 to +50°C.
There is a possibility of recycling the battery.
Quick and easy installation, easy maintenance and handling.
Low internal resistance.
The electrical characteristics of the batteries are fully in accordance with the standard of the International Electrotechnical Commission IEC.

General data

IBG's open prismatic Ni-CD batteries belong to the group of alkaline electrolyte batteries.
The label "prismatic" tells us about the shape of the battery.
According to the construction of the electrode, the battery belongs to the group of batteries with lamellar electrodes.

Terms and definitions

The rated battery voltage (operating voltage) is 1.2 V.
In order to achieve the required higher voltage values of 1.2 V, the battery is regularly connected to the battery.
The nominal capacity of the battery is five hours capacity (C5) at a temperature of 20 ± 5 ° C, expressed by the amount of electricity in ampere hours (Ah) and marked C5, Ah.
Normal (rated) charging and discharging current is: I = 0.2 C5A.
Charging time with rated current is 7.5 - 8 hours, which ensures full charge.
The charge factor is: F = 150 - 160% C5Ah.
Discharge time with rated current I = 0.2 C5A to 1.0 V / cell and lasts at least 5 hours.
The electrolyte in the battery is a solution of KOH (potassium hydroxide) in distilled water.The electrolyte density is 1.2 ± 0.01 g / cmł.


Electrical characteristics of charging at a temperature of + 20 ° C

Constant current charging

Charging current isI = 0,2 C5A.
Charging time is7,5 * 8h.
Charging is also possible with currents from0,1 to 0,5 C5A, but the charging time must meet the condition of full charge F = 150-160% C5Ah.
Constant voltage charging (parallel connection to the consumer)
Recommended voltages for this type of charging range from 1.45 V to 1.55 V per battery.
The charging current at the end of charging (maintenance current) is approx0,04 C5 A.

Charging according to "IU System"

The initial charging current is in the interval of0,1 to 0,5 C5 A.
Constant current charging lasts up to a limit voltage of 1.50 V or 1.55 V per cell.
Continuation of charging at limited voltage with decreasing current lasts up to the value of the maintenance current I = 0,04 C5 A. Charging time depends on the initial charging current.
Increased charge

Enhanced charging is applied before commissioning and after prolonged storage, or prolonged battery operation in difficult conditions. The charging current is constantI = 0,2x C5A.
Charging time is from10 to 12 h.
The voltage per cell is initially1,35 V/cell, and at the end1,75 V.
Increased charging can be repeated if the control detects a reduced battery capacity.

Maintaining charging

For longer storage and to maintain charge, the battery is recharged indefinitely I = 0,5 do 2 mA/Ah.
The charging voltage is1,40 + 0,02 V/cell.
Recharge time is unlimited



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