LoginBreakthrough EV Battery Patent Could Charge In Minutes And Cross A Continent
- Huawei has developed solid-state battery tech that could make EVs go further and charger faster.
- Cells have triple the energy-density of li-ion ones and could theoretically give an 1,800-mile range.
- Chinese patent application says the new battery pack could be fully recharged in only five minutes.
Unless your daily commute involves chasing down a Cannonball Run record, chances are you’re not rolling around with a 70-gallon (265-liter) fuel cell in your car. Most of us don’t need to knock out 1,860 miles (3,000 km) in one uninterrupted stretch. But according to Huawei , that kind of range might soon be possible in an electric vehicle.
The Chinese tech giant claims its new battery technology could enable a future mid-size EV to cover that distance on a single charge.
Related: BYD’s New 1,000 kW EVs Fill Up As Fast As Gas Cars
Like Toyota, VW, BMW, Stellantis and other big players in the tech and automotive space, Huawei has spent the last few years working on solid state batteries, which most experts agree will bring a step-change in EV usability. And this month Huawei filed a Chinese patent for solid-state battery chemistry that comes with some bold claims.
The cells, whose sulfide electrodes are doped with nitrogen to reduce lifespan-shortening side reactions, have an energy density of 400-500 Wh/kg, the filing says, or triple the figure for current conventional cells. Huawei reckons that would allow a typical midsize sedan to cover 1,860 miles on a single charge. Oh, and that charge – to full, not 80 percent – would take just five minutes.
The 1,860-mile figure would be based on China’s hopelessly optimistic CLTC calculations, so would probably translate to a 1,300-mile (2,090 km) EPA number. Slightly less spectacular, sure, but still around three times what the rangiest 2025 EVs can deliver on a single charge.
It all sounds incredible, but I have some reservations about it actually happening, and not because I doubt Huawei’s tech. No one buying an EV is going to need to travel that far between charges, especially if that EV can be charged in less than five minutes (being able to do that depends on having the infrastructure, but there’s no doubt that will come). And automakers won’t want to build one, anyway, since associated costs will be, at least at first, quite high.
Even in a future where we can sleep while our car does the driving, we’re still going to need bathroom breaks and to stretch our legs with a quick stroll to keep the DVT at bay. And making an EV with an unnecessarily long range means making an unnecessarily heavy and expensive EV because batteries are heavy and expensive, though Huawei expects prices and weights to fall. As TG notes, even with the clever cells, an 1,860-mile EV would still need a battery pack that weighed as much as a Mitsubishi Mirage.
What’s far more likely is that automakers will use the tech to put smaller, cheaper batteries in their cars that still deliver plenty of range – say 600 miles (1,000 km) – but make those cars lighter, and so more efficient, and also less expensive to build and buy. When automakers can deliver an EV that costs less than a gas car, goes further in one hit and refuels faster, electric cars will really take off, infrastructure willing.
Toyota has already talked of its future EVs having a 750-mile (1,200 km) range and that sounds like more than enough to us. What do you think the optimum range is for a family-sized electric car?
