Huawei has entered the increasingly crowded race to develop solid-state battery technology for electric vehicles (EVs).

It joins the ranks of BMW, Mercedes-Benz, Volkswagen, BYD and Stellantis—all of whom see the technology as a potential game-changer for range, safety and charging times.

Running the distance

A new patent filed by the Chinese tech giant, reported by Car News China, outlines a breakthrough solid-state battery design promising energy densities between 400 and 500 Wh/kg—roughly two to three times higher than most lithium-ion EV batteries available today.

The company even claims its design could support a driving range of up to 1,864 miles on a single charge and allow vehicles to charge from 10 to 80% in under five minutes.

While Huawei does not produce its own branded vehicles, it collaborates with Chinese carmakers to integrate cutting-edge technologies into their models.

The patent describes a process that “dopes” sulfide electrolytes with nitrogen, intended to stabilise the lithium interface and reduce side reactions—a common problem in solid-state cells.

Despite these bold assertions, energy experts remain cautious. Professor Yang Min-ho, an energy engineering specialist at Dankook University, told Electrek that while such energy density and range could be feasible in lab conditions, “reproducing those results in the real world is extremely difficult,” especially at a commercial scale.

Nitrogen doping, he added, is “not a new breakthrough,” but instead a known method that has yet to be successfully implemented at industrial levels.

The solid-state dream

Solid-state batteries have long been heralded as the next major leap in EV technology.

Unlike conventional lithium-ion batteries, which use a flammable liquid electrolyte, solid-state cells replace it with a solid material, promising higher energy density, improved safety, faster charging times, and greater lifespan.

The journey toward commercialising solid-state batteries has been fraught with technical challenges.

While prototypes have existed since the 1990s, manufacturers have struggled to overcome issues like poor conductivity, limited durability, and extremely high production costs.

Still, progress continues.

Toyota, for example, plans to unveil a production-ready solid-state EV by 2027, while QuantumScape—a US-based battery startup backed by Volkswagen—claims to be nearing commercial readiness.

In China, CATL and BYD are also advancing their development.

Moving forward

The evolution of car batteries stretches back more than a century.

Early automobiles relied on lead-acid batteries, which were bulky and heavy but sufficient for basic ignition and lighting.

The emergence of the Nickel-Metal Hydride (NiMH) battery in the late 1980s powered the first generation of hybrid vehicles, such as the Toyota Prius.

But it was the advent of lithium-ion batteries—first developed in the 1980s and commercialised for electronics in the 1990s—that made modern EVs viable.

Offering significantly higher energy density and faster recharge capabilities, lithium-ion technology has been the backbone of the EV revolution for the past decade.

Today, battery packs typically deliver energy densities around 150 to 250 Wh/kg, with premium EVs like the Tesla Model S boasting a range of about 400 miles.

A jump to 500 Wh/kg would theoretically triple that, but experts warn that more energy often comes with added weight, which could offset performance benefits.

Beyond range anxiety

Industry analysts argue that Huawei—and others—may be missing the point with ultra-long-range targets, such as 1,800 miles.

“Such a large battery would weigh significantly more and blunt driving dynamics,” said one analyst. “Most people don’t drive more than 300 miles in a day, and public charging infrastructure is improving rapidly.”

Instead, the focus may soon shift toward smaller, more efficient batteries that deliver 600+ miles of range, enough to satisfy nearly all driver needs while reducing cost and vehicle mass.

Combined with ultra-fast charging—a true promise of solid-state tech—this could make EV ownership more convenient than ever.

While Huawei’s technology remains at the patent stage, the news highlights a broader global race to be the first to crack the solid-state challenge in practical terms.

Should they succeed, it could reshape the EV market and usher in a new era of cleaner, longer-lasting, and more practical electric mobility.

Alongside this, battery development is expected to see significant advancements shortly, paving the way for more practical electric vehicles.