Filed patents show the British engineering firm may use solid-state batteries that could stretch electric car’s range to hundreds of miles and increase safety
Dyson could become the next Tesla motors as it develops a new electric car, according to a leading industry expert. Filed patents show the Dyson vehicle may use solid-state batteries, which would see the car’s range stretch to hundreds of miles and also be safer than current batteries.
In March, a government document revealed funding to help Dyson develop “a new battery electric vehicle”. The company declined to comment but in 2015 it said it planned to invest £1bn in battery technology and in October it bought solid-state battery company, Sakti3, for $90m, which founder Sir James Dyson said had “developed a breakthrough in battery technology”.
One of Sakti3’s patents states: “The present invention provides a method and system for an all solid-state rechargeable battery and a vehicle propulsion system powered by the battery.”
“Dyson have some excellent product engineering and some excellent marketing skills, so could they follow the same path as Tesla? Well, yes, probably they could,” said Prof David Greenwood, who leads the energy storage work at Warwick University’s manufacturing group, which the UK’s £1bn Advanced Propulsion Centre chose to lead its battery programme.
US-based Tesla’s expensive, long-range electric cars have achieved cult status among enthusiasts and its new, cheaper Model 3 has attracted more than 325,000 pre-orders, worth $14bn if delivered.
Greenwood said the three key factors for electric car batteries are low cost, safety and a high “energy density” which gives a long range. But currently they are expensive, he said, and cannot drive as far as petrol or diesel vehicles on a single charge.
Solid-state batteries could provide a tenfold increase in energy density – how much power they pack in – and are also safer. This is because existing batteries use flammable organic solvents as an electrolyte (through which the current flows), whereas a solid electrolyte does not pose a fire risk and does not need expensive safety features. The solid electrolyte also means the battery electrodes can be made of a much more energy dense material, such as metallic lithium.
Solid-state batteries for vehicles are being developed by many companies, including Toyota, Volkswagen and Bosch, a major supplier to the automotive industry. Autolib, a car-sharing service in Paris, uses solid-state batteries in its 3,000 small vehicles, while electronics giant Samsung and other companies, like SolidEnergy Systems, are also working on the technology.
However, a recent article in the journal Nature suggested that while solid-state batteries for a mass-market electric vehicles are coming, they are at least a decade away. But when such power-packed batteries arrive, Prof Donald Sadoway at the Massachusetts Institute of Technology told Nature, they could prove decisive in the widespread adoption of electric vehicles: “If we had batteries with [energy densities of] 350 watt-hours per kilogram (Wh/kg) we’d have electric vehicles with 350 miles of range, and that’s the end of petroleum.”
Dyson’s battery company, Sakti3, has not disclosed the energy density it has achieved but industry experts estimate it has already passed 300Wh/kg. Sakti3’s patent states: “No solid state batteries with ceramic electrolytes have come close to achieving [our] level of energy density.”
Greenwood said it usually takes a new battery chemistry that has been proven in the laboratory another five years to scale up to cost-effective, high-volume production, while developing a new electric vehicle could also take five years. Electronic devices like smartphones are replaced frequently, but cars are not and he said: “You need very high reliability and durability before you would put it into a car.”
Tesla’s success to date, said Greenwood, has come from creating a car that overcame people’s worries over range and performance, even if that meant a high price: “Tesla’s genius was very carefully identifying a market segment that would be prepared to pay for it.” Dyson also targets the expensive end of the market with its innovative vacuum cleaners, washing machines and hand dryers.
But could Dyson move successfully into car manufacturing? “It worked for Tesla,” said Greenwood. “Could they then scale it to be in the mass market? Who knows. Tesla have yet to prove they can do that.”
“The challenges of entering the automotive industry are absolutely not to be underestimated,” he said. “But at least with an electric vehicle the barriers to entry are a bit lower than for an internal combustion engine vehicle [because] the latter have some horrendously complex legislation to meet around emissions, for instance, which are simply not a problem for an electric vehicle as they do not have noxious emissions.”
Note: The original article named the Paris car-sharing service Autolib as Blueindy, which is the company’s operation in Indianapolis.
Avots: The Guardian
