Raising A GM EV1 From The Dead

Probably the biggest story in the world of old cars over the past couple of weeks has been the surfacing of a GM EV1 electric car for sale from an auto salvage yard. This was the famous electric car produced in small numbers by the automaker in the 1990s, then only made available for lease before being recalled. The vast majority were controversially crushed with a few units being donated to museums and universities in a non-functional state.

Finding an old car isn’t really a Hackaday story in itself, but now it’s landed in [The Questionable Garage]. It’s being subjected to a teardown as a prelude to its restoration, offering a unique opportunity to look at the state of the art in 1990s electric automotive technology.

The special thing about this car is that by a murky chain of events it ended up as an abandoned vehicle. GM’s legal net covers the rest of the surviving cars, but buying this car as an abandoned vehicle gives the owner legal title over it and frees him from their restrictions. The video is long, but well worth a watch as we see pieces of automotive tech never before shown in public. As we understand it the intention is to bring it to life using parts from GM’s contemporary S10 electric pickup truck — itself a rare vehicle — so we learn quite a bit about those machines too.

Along the way they find an EV1 charger hiding among a stock of pickup chargers, take us through the vehicle electronics, and find some galvanic corrosion in the car’s structure due to water ingress. The windscreen has a huge hole, which they cover with a plastic wrap in order to 3D scan so they can create a replacement.

This car will undoubtedly become a star of the automotive show circuit due to its unique status, so there will be plenty of chances to look at it from the outside in future. Seeing it this close up in parts though is as unique an opportunity as the car itself. We’ve certainly seen far more crusty conventional cars restored to the road, but without the challenge of zero parts availability and no donor cars. Keep an eye out as they bring it closer to the road.

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Thermal Runaway: Solving The Bane Of Electric Vehicles

Although battery fires in electric cars and two-wheeled vehicles are not a common phenomenon, they are notoriously hard to put out, requiring special training and equipment by firefighters. Although the full scope of the issue is part of a contentious debate, [Aarian Marshall] over at Wired recently wrote an article about how the electric car industry has a plan to make a purportedly minor issue even less of an issue. Here the questions seem to be mostly about what the true statistics are for battery fires and what can be done about the primary issue with batteries: thermal runaway.

While the Wired article references a study by a car insurance company about the incidence of car fires by fuel type (gas, hybrid, electric), its cited sources are dubious as the NTSB nor NHTSA collect statistics on these fires. The NFPA does, but this only gets you up to 2018, and they note that the data gathering here is spotty. Better data is found from European sources, which makes clear that battery electric vehicles (BEVs) catch fire less often than gasoline cars at 25 per 100,000 cars sold vs 1529/100k for ICE cars, but when BEVs do burn it’s most often (60%) from thermal runaway, which can be due to factors like a short circuit in a cell, overcharging and high ambient temperatures (including from arson or after-effects of a car crash). Continue reading “Thermal Runaway: Solving The Bane Of Electric Vehicles”

From Nissan ICE Pickup To BEV With Nissan Leaf Heart

First run of the motor with battery pack still externally connected.

Last year [Jimmy] got a request from a customer ([Dave]) to help convert a 1998 Nissan Frontier pickup into an electric drive vehicle, with a crashed 2019 Nissan Leaf providing the battery and electric motor for the conversion. He has documented the months-long journey with plenty of photos, as well as a series of videos over at the [EVSwap Conversions] YouTube channel. While the idea sounds easy enough, there’s a lot more to it than swapping out the ICE with an electric motor and sticking some batteries to the bottom of the car somewhere with double-sided tape. The pickup truck got effectively stripped down  and gutted, before the 110 kW (150 HP) motor got installed using an adapter plate.

The donor Leaf’s battery pack came in at a decently sized 40 kWh, which should give the converted Nissan Frontier BEV a range of easily 100 miles. This pack was split up into two packs, which got put into a custom aluminium battery box, each mounted on one side of the driveshaft. The charging port got installed on the front of the car, next to the logo, discreetly behind a panel. The front of the car had much of the openings that were needed for the ICE’s radiator sealed up for reduced air friction, along with the new low-friction tires that got installed. Although this converted car still has a radiator, it only needs to assisting cooling the motor stack (including inverter and charger) when driving slowly or charging, making it far less demanding and thus allows for a more sleek front.

As a bonus, the car still has the manual 5-gear shift, just without a clutch, and the pickup bed can now also tilt, albeit with hydraulics (so far). Considering that it started with a decent 1998 pickup and totaled Nissan Leaf, this is among the cleanest conversions we have seen, not to mention a good use of a crashed BEV.

Thanks to [JohnU] for the tip.

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A black PCB with a cellular modem board piggy backed on top. It has a micro-USB and DB-type connector on the end facing the camera.

Open Vehicle Monitoring System Is The Window To Your EV’s Soul

Electric cars have more widgets than ever, but manufacturers would rather you don’t have direct access to them. The Open Vehicle Monitoring System intends to change that for the user. [via Transport Evolved]

As car manufacturers hoover up user data and require subscriptions for basic features, it can be a frustrating time to make such a big purchase. Begun in 2011, OVMS now interfaces with over a dozen different EVs and gives you access to (or helps you reverse engineer) all the data you could want from your vehicle. Depending on the vehicle, any number of functions can be accessed including remote climate start or cell-level battery statistics.

The hardware connects to your car’s OBDII port and uses an ESP32 microcontroller connected to a  SIMCOM SIM7600G modem (including GPS) to provide support for 3 CAN buses as well as Wi-Fi and Bluetooth connections. This can be particularly useful for remote access to data for vehicles that can no longer phone home via their originally included cellular modems as older networks shut down.

Do you wish EVs weren’t so complicated? Read our Minimal Motoring Manifesto.

Can A $3200 Kit Convert Your Car To Electric Power?

Whether hardcore petrolheads like it or not, we appear to be living through the final years of the internal combustion engine. In many countries there are legislative timetables in place for their eventual phasing out, and even those which remain in production are subject to ever more stringent emissions legislation. If there’s a problem with the EVs with which we’re expected to replace our fossil fuel vehicles it’s the cost, those things are still very expensive. An Aussie student has an interesting idea that’s won the James Dyson Prize: a low cost conversion for existing vehicles that bolts onto their rear wheel hubs.

Electric conversion of fossil fuel cars is nothing new, indeed we’ve brought you news of units designed to replace the original engine and transmission. Neither are wheel hub motors new, but the difference with this system is that it doesn’t require significant mechanical modification to the vehicle. It retains the old engine, and this motor sits inside each rear wheel.

It almost seems too good to be true, but a closer reading shows the rotor bolted on one side to the old wheel hub and on the other side to the wheel. The stator meanwhile is bolted to the existing brake caliper mountings. This would lead to a slightly wider track and a greater unsprung weight, but we can see that it would work. Besides the motor there’s a battery pack for the spare wheel well and a set of electrically-powered systems to supply the brake servo vacuum and other services. The idea is that this whole kit could be fitted for 5000 Australian dollars, which is somewhere south of $3200 USD. It’s not perfect and it still involves hauling around the dead weight of an unused engine, but we can see it might still have a niche. If, and that’s a big if, it ever makes it to market, that is.

A black race car with white text of sponsors moves across an asphalt surface. There is a blue wall and a green, grassy field in the background. The car has white and red stripes as well.

Students Set EV Acceleration World Record

Humans have a need for speed, and students from the Academic Motorsports Club Zurich (AMZ) have set a new acceleration record for an electric vehicle with a 0 to 100 km/h (0 to 62 mph) time of 0.956 seconds.

The mythen features four custom electric hub motors with a total output of 240 kW and a vehicle weight of 140 kg (309 lb) thanks to the use of carbon fiber and aluminum honeycomb. The car was able to get up to speed over only 12.3 m (40 ft)! As with many student design team projects, every component was hand built and designed to optimize the power to weight ratio of the vehicle.

The students from ETH Zurich and Lucerne University of Applied Sciences and Arts were excited to regain the record from the team at the University of Stuttgart, having previously held the title in 2014 and 2016. We suspect that they will find any European EV maker’s engineering department excited for the chance to hire them come graduation.

If you want to go fast at a smaller scale, checkout 3D printing RC car wheels for speed, and if you’d rather ride the rails at an accelerated rate, here’s an article on high speed rail.

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A DeLorean sitting on patchy snow next to a driveway. It's angled away from the viewer to the left showing off the open engine compartment with bright orange high voltage lines coming out of a square metallic charger box.

A DeLorean With An Electrifying Secret

There are few production cars with as much geek cred as the DMC DeLorean. If you want to kick the nerdiness up a notch without doing a full Back to the Future prop-mod, then the next best thing is to make it an EV.

[Bill Carlson] took a 1981 DeLorean and transplanted the drivetrain from a Chevy Bolt to electrify this ride. With the DeLorean being a rear wheel drive vehicle and the Bolt front wheel, there was some amount of component reshuffling to do. The motor is now in the rear of the car along with the main contactor, charger, and motor controller while the batteries are split between a pack in the original engine compartment and another up front under the hood.

The electric power steering and brake booster from the Bolt now also live under the hood, and the accelerator and steering column from the EV were transplanted into the cockpit. [Carlson] still needs to tidy up the interior of the car which is currently a nest of low voltage cables as well as add the cooling system which will bring this stainless monster up to a hefty 3200 lbs (~1450 kg) versus the original 2850 lbs (~1300 kg). We suspect the total bill came in a bit lower than getting an electric DeLorean Alpha5.

This isn’t the first electric DeLorean we’ve covered here, and if that isn’t cool enough, how about this DeLorean-inspired hovercraft?

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