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Lamborghini moved away from standard batteries and focused on supercapacitors at their Terzo Millennio concept

15.11.2019
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source: CNET news

Lamborghini teased a concept last week for MIT’s EmTech conference. Now it’s here, and it’s crazier than the teaser let on. The Lamborghini Terzo Millennio concept is the result of collaboration between Lamborghini and MIT Massachusetts Institute of Technology, wherein the two parties are digging into materials research and other automotive-related areas. The whole point is to envision a supercar not from the next generation, but the generation after that. It focuses on five distinct areas — energy storage, materials, propulsion, design and emotion.

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In terms of propulsion, it packs four electric motors, one in each wheel, which permits more freedom in design by hiding all the motor-related stuff in the wheel wells.

As for energy storage, Lamborghini moved away from standard batteries and instead focused on supercapacitors, which can accept and deliver charge faster than batteries can, while withstanding numerous charge cycles and featuring storage capacities much higher than standard capacitors. Lamborghini currently uses supercapacitors to power the stop-start system of the Aventador.

Speaking of holding charges, the materials used in the Terzo Millennio do more than keep the car rigid. Lamborghini and MIT are researching using the car’s carbon fiber body as an energy storage medium, turning the whole body into a battery of sorts.

That technology can also be used to monitor the car’s carbon fiber structure. If small cracks develop — say, from a collision — the charge may move through the body differently, which can kick-start a “self-repairing” process in order to prevent the cracks from growing.

As for design, well, it’s a Lamborghini, and it largely looks like one. The company’s traditional design language is here, in the form of some sharp angles on all sides. However, with the removal of a traditional drivetrain, the cabin is pushed forward a great deal. Air channels are everywhere to help keep the car as planted as possible.

When it comes to emotion, don’t expect some sort of soulless autonomous machine here. The Terzo Millennio does have some automation, but it’s shown off as something to help the owner become a better driver. It could be capable, however theoretically, of taking a driver around a track to display the best driving line, so that drivers can enhance their own abilities without an actual coach sitting shotgun. It treats autonomy as a means to an end, rather than the end itself.

The Terzo Millennio supercar concept has a futuristic (yet very Lamborghini) design, which is coupled with new technologies. The concept was born from a three-year collaboration between Lamborghini and the Massachusetts Institute of Technology. The partnership aims to “write an important page in the future of super sports cars for the third millennium,” according to Lamborghini.

The concept car itself has four electric motors, one in each wheel, as well as supercapacitors, which can deliver a charge faster than traditional batteries, while handing many charge cycles and featuring storage capacities much higher than standard capacitors. Lamborghini and MIT even said they are also looking into using the car’s carbon fiber body as an energy storage medium.

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The result: If tiny cracks should appear due to a collision or whatever, the charge can traverse through the car’s body and jump-start a “self-repairing” process to prevent further cracks from spreading. MIT’s Dinca Research Lab and MIT’s Mechanosynthesis Group are focused on the development of energy storage systems as well as the use of these forward-thinking materials.

That said, Lamborghini and MIT have mostly worked on the exterior design for now. It still needs to develop a system that is capable of high-peak power and energy. Keep in mind this is a concept car, and as such, there is no firm deadline as to when or how Lamborghini will incorporate these technologies and designs. The Lamborghini-MIT partnership has two more years, however.

Supercapacitors have, traditionally, had issues however. For a start they offer much less energy storage density than batteries, since the chemical means by which a battery stores its potential energy is more effective on a weight-for-weight basis than the electric field which a supercapacitor relies upon. They’re also usually limited to low voltages.

Lamborghini used such low-voltage supercapacitors back in the V12 Aventador, but now it’s looking to a new breed for its future vehicle. With the Dinca Research Lab, led by Professor Mircea Dinca, the goal is an energy storage system that can both deliver high peak power and regenerate kinetic energy, but do so while symmetrically releasing and harvesting electric power.

“You can have good performance but then you have a problem for how many times you can have that performance,” Reggiano explains. “If you look at our customer, if they’re on the track, if they’re enjoying the car they don’t want to stop to charge the battery.”

For it to be worthwhile, though, it can’t lose the very advantages that supercapacitors boast today, particularly their long lifecycle. It’ll also need to improve on the energy density potential, which is where the parallel work in innovative materials comes in.

Existing Lamborghini models already use carbon fiber, for its low weight, high structural rigidity, and its flexibility in constructing unusual shapes. The new Hurucan Performante, for instance, makes significant use of so-called forged composites, where chopped carbon fibers are embedded in a matrix of resins. The resulting substance can be molded in far more flexible ways than regular carbon fiber might.

That’s where Prof. Anastasios John Hart of the Department of Mechanical Engineering, and the Mechanosynthesis Group, come in. They’re working on ways to manufacture the bodyshell of the Terzo Millennio, so that not only is it structural but it can at as an accumulator for energy storage. Indeed, the complete body of the car can be used as a storage system.

Right now, much of this is still theoretical. However, the goal is to use carbon nano-tubes as electrodes, arranging their structure so that they can be used as the anodes and cathodes in a huge, structural battery. In the first year, the team will explore methods by which materials can be impregnated with battery technology; in the second, it’ll look at ways to make a flat panel out of that system. Finally, in year three the focus will be making a 3D version of that flat panel, vital if it’s to double as the frame.

Since that dual purpose will make it all the more important to monitor the condition of the bodyshell – and act quickly should a problem be observed – the researchers want to make the Terzo Millennio self-healing. Micro-channels filled with “healing chemistries” would be able to automatically react to any cracks or damages in the carbon fiber substructure, strengthening the body long before any such weaknesses were visible to the human eye.

“If I need to use carbon fiber in every component,” Reggiani highlights, “I must be sure I can detect every type of failure in every component.”

It’s not science for its own sake: there’s a pure underlying reason for it that comes as no surprise for a supercar firm. By making the carbon fiber self-monitoring and self-healing, more parts can be constructed from it. That means an overall cut in weight, which allows for increased performance.

That performance comes from a new propulsion system, with Lamborghini embedding an electric motor in each of the Terzo Millennio’s wheels. As you’d expect, each can act both as a driving force but also as a regenerative engine, pushing power back into the supercapacitor battery system when braking. It provides the all-wheel drive that modern Lamborghini cars have become known for.

In addition, by pushing the motors into the wheels themselves, there’s greater flexibility for the concept’s overall design. The handiwork of the Lamborghini Centro Stile design studio, the Terzo Millennio made perfect airflow its lodestar. As a result, the forced composite monocoque can be far purer than its counterpart in most other sports cars, since it need only accommodate the two seats and the energy accumulation system.

What that accommodation will look like isn’t being answered today. Lamborghini may have made a 1:1 sculpt of the Terzo Millennio, but it hasn’t come up with the concept’s interior at this stage. What the automaker is clear on, though, is that the current industry trend toward autonomous driving is something that really doesn’t mesh with what Lamborghini owners expect of their cars.

“You normally don’t buy a sports car to have it driven by a computer,” Riccardo Parenti, head of concept development, pointed out. “We think it’s much more strategic to have it … teach the driver, to improve his skill. Rather than get a Level 5 car.”

Instead, Lamborghini is thinking more along the lines of training rather than replacing the person behind the wheel. The so-called Piloted Driving simulation would give a demo lap by a virtual expert, which they could then try their best to emulate.

Just as the driver can expect guidance, so Lamborghini as a whole is looking to the Terzo Millennio to lead the way.

“Our big job is to define the DNA,” Reggiani says. “We just finished imagining [how] to put the DNA of a super sport car like an Aventador or Huracan into an SUV … In this box that we call Lamborghini of the third millennium we want to put some provocation in terms of emotion, that can be different from what it is today.”

Whatever Lamborghini and MIT comes up with, it’ll be exclusive to the automaker. And, while the current concept being revealed today may incorporate every element of what’s being worked on, what seems more likely is that the various technologies will be released piecemeal as they’re considered market-ready. Super-capacitors, for instance, are likely to be ready before self-healing monocoques.

“The scope of today is to be able to think what could be an electric vehicle, super-light, able to do the best performance,” Reggiani concludes, “to be able to run not only one single lap but several laps where the driver can enjoy the experience, and where the driver is able to recharge as soon as possible.” Lofty goals, not to mention difficult ones. That’s probably why this Terzo Millennio is the vision of the Lamborghini for the third millennium, and not for production any time soon.

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