Support for nickel batteries - DIY - Victron Community

03, Mar. 2026

 

Support for nickel batteries - DIY - Victron Community

NiCd Batteries – Cadmium.org

Nickel-cadmium batteries provide critical back-up power functionalities to ensure public transportation systems operate safely in case of main power failure:

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Aviation: Due to their unique benefits, industrial nickel-cadmium batteries are the preferred battery technology for both civilian aircraft (Airbus, Boeing, Embraer and others) and military aircraft. They provide back-up power for avionic and other critical on-board systems should the principal power source fail, and also start aircraft engines on the ground.

Rail: Industrial nickel-cadmium batteries are widely used as back-up power in railways and underground metro systems. They ensure that emergency braking, coach lighting, heating & air conditioning, and driver-to-passenger communication remain fully functional should the main power source fail. They also provide locomotive starting and trackside back-up power for signalling and warning lights in harsh climate areas.

Manufacturers of industrial nickel-cadmium batteries have developed an extensive network of Bring Back Points (BBPs) in the countries which they serve. These facilities provide a free of charge, easy to use, environmentally compliant end-of-life service for end users. These BBPs are tasked by manufacturers to receive, consolidate and ship used nickel-cadmium batteries to fully permitted recyclers which specialize in the treatment of cadmium-containing waste. All transport is carried out in compliance with applicable Dangerous Goods regulations and with Basel Convention requirements which regulate transborder shipment of hazardous waste.

The recyclers heat up the cadmium-containing fraction of the used batteries to over 800 °C, which is the temperature at which cadmium vaporizes. The cadmium is then cooled and condensed into high-purity ingots. Most of the recycled cadmium is then used to manufacture new batteries.
Besides cadmium, other metals present in these batteries, such as iron, copper and nickel, are extracted and resold to be further reused by industry.

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No other technology matches the industrial nickel-cadmium chemistry in its areas of excellence.

When it comes to use life, reliability, sturdiness and operational temperature range, its performance exceeds that of the standard industrial battery technology.

New technologies such as Li-ion batteries which display a superior cycling ability and a higher energy density have made new applications possible. The most significant ones are electrical mobility and grid-connected energy storage systems.

However, the Li-ion battery technology does not display the intrinsic properties of nickel-cadmium batteries. Furthermore, they require an embedded electronic management system to continuously ensure the proper surveillance of their functioning. The presence of such a system reduces the reliability of this technology.

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