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How to use our Nickel Cadmium battery packs efficiently ?

We offer a large range of Ni-Cd batteries

The Ni-Cd batteries produced by ARTS Energy have clearly demonstrated their high level of performance since more than 40 years.

They offer unique performances for power at very low temperatures and offer a good compromise cost/performance for cycling and back up applications.

Many technologies are available with their own features and benefits.

For each technology, precautions must be applied.

Recommendations for the charge

Fast charge

Only VSE and VRE ranges can be fast charged, up to 1C, with an adapted end of charge detection and cut-off system.

To detect and stop end of charge, ARTS Energy recommend to use -Delta V/V = 1%. This system must be inhibited during the starting of charge (until 2 minutes to prevent too early detection).

After the fast charge, it is recommended to use a trickle charge to well balance the battery and to keep it fully charged.

In case of pulsed charge at rate <50Hz, it is mandatory to avoid rest period >1 second.

Standard charge (C/10)

C/10 charging rate can be used, but with a timer (16h) and starting from a fully discharged cell (to avoid too strong overcharge).

Below 0°C, charge voltage must be limited to 1.60V/ cell.

Trickle charge (C/20)

A trickle charge in the range of C/30 to C/20 (recommended C/20) can be used to maintain the cell or battery pack in a fully charged state.

Below 0°C, charge voltage must be limited to 1.60V/ cell.

Intermittent charge

Intermittent charge is forbidden for Ni-Cd (rest period > 1 second) because that generates short-circuits.

Be careful with overcharging

Repeated overcharging out of the specification could cause leakage and deteriorates cell performances.

Over-discharge

A deep discharge or “over discharge “damages the cell performance so it is recommended to manage the discharge with an appropriate low voltage disconnect system (consult ARTS Energy for advice) and to avoid to leave the cell /battery connected to the equipment for a long period (>6 months) when the equipment is disconnected from the main.

Storage

Normal conditions :

ARTS Energy recommends to store the cell/battery within the temperature range +5°C to +25°C in a 65 ± 5% relative humidity atmosphere and to avoid storing a cell discharged.

After 4 months storage at RT or 1 month at +40°C, Ni-Cd shall recover 100% of its minimum capacity (after a complete cycle).

An extended storage between –40°C and 5°C and between+25°C and +70°C at 65% relative humidity, is permitted no more than one month.

Long term storage :

Long term storage leads to battery self-discharge and deactivation of chemical components. ARTS Energy recommends storing for a long period between 5°C and 25°C.

In such case, it is recommended to partially recharge the cells/battery each 6 months. In addition, when using the cells/batteries for the first time after 6 months storage, in order to restore the initial cell performances, it is recommended to full cycle the cell/battery (maximum 5 cycles).

In these conditions, Ni-Cd cell shall recover 90% of its initial capacity.

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