Market Sector

Commercial Vehicles & Construction Equipment


As a make-to-order manufacturer, we take care of your production data, parts lists and production specifications, and carefully review it all for possible improvements. We then design the manufacturing processes and select production methods. Because we are specialized in SMT and THT production, with expertise in different soldering processes, we ensure you get competitive rates.

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Lithium-ion batteries

The Demmel Group develops and assembles customized lithium-ion batteries. We manufacture your battery pack including the required safety circuit and battery management system (BMS). Need additional circuit components or end-to-end assembly solutions? We can provide that too.

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metalLight® is our innovative solution for decorative metal surfaces illuminated through tiny holes. For the metal surface, we offer several high-quality aluminum and stainless steel alloys, plus refinement using special processes. When combined with touch functions, what you get is control systems that perfectly unite form and function.

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Lithium ferrophosphate (LFP) batteries

For even higher safety requirements, we offer lithium ferrophosphate batteries, which are a variation on conventional lithium-ion technology. Here, too, we offer full-service customer-specific solutions, right up to complex packs that include protection circuit modules (PCM) and matching battery management systems (BMS).

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Electromechanical switching systems

When it comes to electromechanical switching, we are a strong systems partner. Our design department will develop the right incremental encoder for your needs. We then engineer a switching mechanism and all mechanical components, including the electronic interface to your control system – all according to your precise requirements.

Lithium polymer batteries

When space is limited or flexible battery formats are required, we recommend the use of lithium polymer batteries or pouch cells. These models forgo a steel cell housing and rely instead on plastic-aluminum foils to contain the battery pack. Our services for this battery type include enabling the design-in of customized lithium polymer batteries, plus integrating the necessary protection circuit modules.

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Battery chargers

We supply the right charging technology for every battery pack. For lithium-ion cell charging, we always optimize parameters for the best possible result. Depending on your needs, we either develop custom chargers or recommend the right standard chargers, giving you long-term confidence for your application. Our goal is to provide a true "one-stop shop", and provide you with an end-to-end offering of innovative products and expertise.

Battery management systems (BMS)

When it comes to operating battery packs with multiple individual cells, battery management systems (BMS) are state of the art. Protective circuits protect against overcharging, deep discharge and unplanned overload. Controlled balancing keeps all cells at the same level. Whether you need a simple protective circuit or a high-end BMS, we help you find the right solution for your smart battery.

Certifications for batteries

Our range of services also includes the certification of lithium-ion batteries. Depending on the product category, different guidelines and laws apply worldwide. We advise you on the required standards and organize all necessary certifications for the transport and operation of your battery pack.