{"id":7766,"date":"2026-06-05T13:29:58","date_gmt":"2026-06-05T11:29:58","guid":{"rendered":"https:\/\/demke-electronic.com\/applications\/e-mobility-and-vehicle-technology\/"},"modified":"2026-09-03T13:51:41","modified_gmt":"2026-09-03T13:51:41","slug":"e-mobility-and-vehicle-technology","status":"publish","type":"page","link":"https:\/\/demke-electronic.com\/en\/applications\/e-mobility-and-vehicle-technology\/","title":{"rendered":"E-Mobility and Vehicle Technology"},"content":{"rendered":"\t\t
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We convert power for e-mobility and vehicle technology<\/div>\t\t\t\t<\/div>\n\t\t\t\t
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DC\/DC converters for e-mobility and vehicle technology: onboard power systems, charging converters and E-mark approval<\/h1>\t\t\t\t<\/div>\n\t\t\t\t
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DC\/DC converters in electric vehicles supply the 12 V vehicle electrical system from the traction network, charge battery systems and keep the supply voltage stable when the vehicle voltage changes. Especially in commercial vehicles, the requirements go far beyond simple voltage conversion. Different 24 V, 48 V and 60 V vehicle platforms should ideally be covered with only a few converter variants, while EMC requirements must still be met in the complete vehicle. Our converters therefore cover input voltage ranges from 17 to 70 VDC with one device platform, achieve up to 96% efficiency without power derating and can be approved for road use according to UNECE Regulation R10 on request. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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The Challenge<\/div>\t\t\t\t<\/div>\n\t\t\t\t
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Variants, EMC and an onboard power system that allows no margin for error<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Vehicle onboard power systems are electrically harsh environments. During start-up, the voltage drops, while alternators and traction inverters generate electrical interference and switched inductive loads cause transients. In addition, there are vibration, shock, dust, moisture and temperatures ranging from desert summers to Arctic winters. <\/p>

Two problems are more significant than the technical challenges alone:<\/p>

Variantenvielfalt.<\/strong> Commercial vehicle fleets are rarely homogeneous: manufacturers working with 24 V, 48 V and 60 V platforms need a separate narrow-input-range converter for each one \u2013 each with its own part number, approval, spare parts inventory and procurement process. These costs are not reflected in the purchase price itself, but in the organisation behind it. <\/p>

EMC compliance for the complete vehicle.<\/strong> In an electric vehicle, the DC\/DC converter operates alongside power electronics that switch high currents in the kilohertz range. However, electromagnetic compatibility must be demonstrated for the complete vehicle. If the vehicle fails the test, troubleshooting begins: identify the source, make modifications and test again \u2013 potentially adding weeks to the project schedule shortly before series production. A component that already comes with this compliance reduces troubleshooting effort because one potential source of interference has already been tested. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Use case 1<\/div>\t\t\t\t<\/div>\n\t\t\t\t
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One converter for 24 V, 48 V and 60 V onboard power systems \u2013 electric vehicles in urban applications<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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A manufacturer of electric cleaning and municipal vehicles for urban environments uses our 162E-13.8-ON<\/strong> to supply the vehicle\u2019s 12 V system from the traction power system \u2013 including the onboard power outlets used to connect additional equipment during operation.<\/p>

This is more electrically demanding than it may sound. In a fully electric vehicle, there is no alternator: the DC\/DC converter takes over its role and is the only source for recharging the 12 V system. The 12 V battery acts as a buffer and is charged solely by the converter. The onboard power outlet is also the only point in the vehicle where the manufacturer cannot control what is connected \u2013 work lights, telematics, chargers or control devices. The converter must therefore be able to continuously deliver its full power and remain short-circuit protected, even if a faulty auxiliary device is connected. With 13.8 VDC at up to 20.0 A and 275 W<\/strong>, there is sufficient reserve. <\/p>

The converter operates over an input range of 17 to 70 VDC<\/strong>. This means one device can cover 24 V, 48 V and 60 V vehicle electrical systems. The manufacturer manages one part number instead of three variants, completes one approval process instead of three and keeps one spare part in stock instead of three. <\/p>

The 13.8 V is not a random value: it corresponds to the float charging voltage of a lead-acid onboard battery. The converter therefore not only supplies the 12 V loads but also keeps the onboard battery charged \u2013 eliminating the need for a second component. <\/p>

With an efficiency of up to 96%<\/strong>, little heat is generated, which is dissipated through the housing. Modern semiconductors and direct heat dissipation enable high power density in a compact, highly integrated design \u2013 without fans or moving parts. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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