{"id":3107,"date":"2025-10-10T01:32:19","date_gmt":"2025-10-09T23:32:19","guid":{"rendered":"https:\/\/neomium.eu\/?p=3107"},"modified":"2025-11-04T18:20:15","modified_gmt":"2025-11-04T17:20:15","slug":"rall-e-electric-lawnmower-conversion","status":"publish","type":"post","link":"https:\/\/neomium.eu\/de\/2025\/10\/10\/rall-e-electric-lawnmower-conversion\/","title":{"rendered":"From Rallye to Rall-E: How a Broken Mower Sparked an Electric Idea"},"content":{"rendered":"
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How a Broken Mower Sparked an Electric Idea<\/div><\/div>

From \"Rallye\" to \"Rall-E\"<\/span><\/span><\/h1><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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How a Broken Lawnmower Became a Fully Electric Prototype – Powered by Neomium<\/h3>

When a broken lawnmower engine sparked an idea, Neomium\u2019s engineers turned it into Rall-E<\/strong> – a ride-on mower electrified with the C\u00c6SIUM\u00ae Cs-40 controller<\/strong>, modular magnetic battery packs, and a hint of movie-robot charm.<\/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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From Rallye to Rall-E – How a Broken Mower Sparked an Electric Idea<\/h3>

Every engineering company has its small side projects – the ones that start with a “what if” during a coffee break. For Neomium, that moment came when our old Rallye UM1136<\/strong> ride-on lawnmower broke down on the way to the test field.<\/p>

The internal combustion engine was done: a blown cylinder-head gasket, beyond easy repair. We could have ordered a new engine, repaired it, or have it repaired. But instead one of our engineers asked the question that defines our brand philosophy:<\/p>

“Why not electrify it?”<\/strong><\/p>

And just like that, Project Rall-E<\/strong> was born.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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A Proof-of-Concept with Personality<\/h3>

The name came naturally. “Rallye” turned into Rall-E<\/strong> – echoing not only the original machine but also the spirit of a beloved movie robot that turned scrap into hope.<\/p>

Where that robot collected waste, our Rall-E mows lawns – demonstrating that Neomium\u2019s technology can power anything from future aircraft systems to… a humble lawnmower.<\/p>

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Painted in rusty orange, fitted with two expressive robot eyes, and equipped with a digital dashboard showing speed, voltage, and power, Rall-E became both a functional prototype and a character – a small ambassador of what\u2019s possible when engineering meets creativity.<\/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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Electrification from the Inside Out<\/div><\/div>

Powertrain<\/span><\/span><\/h2><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Underneath Rall-E\u2019s playful exterior lies a fully functional electric powertrain built from Neomium\u2019s core technologies.<\/p>

The C\u00c6SIUM\u00ae Cs-40 Controller<\/h4>

At the heart of Rall-E beats our Cs-40 mid-voltage motor controller<\/strong>, capable of 40 kW peak power<\/strong> and operating in the 180-200 V range<\/strong>. Running on open-source VESC\u00ae firmware<\/strong>, the controller offers full transparency and configurability – the same philosophy that makes it a favorite among developers in e-mobility research.
Its modular communication setup (CAN, UART, analog interfaces) and high thermal efficiency made it the ideal choice for this small-scale demonstration.<\/p>

Magnetic, Weld-Less Battery Modules<\/h4>

The power source? A set of Neomium\u2019s proprietary modular batteries<\/strong>, based on our magnetic cell contacting<\/strong>. Instead of welds or solder joints, the cells are connected magnetically, allowing tool-less assembly, full recyclability, and straightforward second-life use.
Each module is individually monitored at single-cell level, ensuring safety and longevity even under rough test-field conditions. This technology is currently advancing toward CE certification – and Rall-E provided the perfect playground to test robustness, vibration resistance, and integration flexibility.<\/p>

The Dacia Spring Motor<\/h4>

For the drive unit, a reused Dacia Spring electric motor<\/strong> was chosen – a compact, efficient traction motor that perfectly matches the Cs-40\u2019s capabilities. By repurposing an existing EV motor, we demonstrated how second-life hardware<\/strong> can blend seamlessly with first-class control electronics<\/strong> to create a fully functional conversion.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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How to Propel Electrification<\/div><\/div>

The Build<\/span><\/span><\/h2><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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From Workshop Sketch to Working Prototype<\/h3>\n

The build process unfolded over a few weekends and many cups of coffee. Our engineers and interns teamed up, combining mechanical retrofitting with electrical integration:<\/p>\n

– Mechanical adaptation:<\/strong> removing the gasoline drivetrain, adapting the chassis, and integrating the motor mount<\/p>\n

– Electrical integration:<\/strong> installing the Cs-40, wiring the battery clusters, and implementing safety cut-offs<\/p>\n

– Control & display:<\/strong> connecting a simple HMI that visualizes speed, voltage, power, and energy use (Wh)<\/p>\n

After the first successful test run, Rall-E quietly cruised through the grass – zero emissions, low noise, and 100 % smiles \ud83d\ude42<\/p>\n

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