Concerns over battery fires do put people off buying EVs, but actual fires are rare. Recent moves by China to toughen EV fire safety regulations (requiring batteries to resist fire or explosion for up to two hours after a fault) have reignited global interest in how to make EVs even safer.
One emerging technology could be the breakthrough the industry needs: solid-state batteries. But what are they, why are they so much safer, and when will UK drivers start seeing them on the road?
What Makes a Solid-State Battery Different?
Today’s EVs rely mostly on lithium-ion batteries, which use a liquid electrolyte to transport electrical charges between their internal components. This liquid, while effective, is also flammable — a major factor behind the risk of battery fires when things go wrong.
Solid-state batteries, by contrast, use a solid electrolyte material such as ceramic, glass, or solid polymers. By eliminating the flammable liquid, solid-state batteries dramatically improve fire resistance and thermal stability. They can withstand higher temperatures and physical damage far better, making catastrophic failures like “thermal runaway” much less likely.
If you’re curious about how current EVs perform in terms of safety, our guide on how safe are EVs? takes a look at real-world data.
Why Solid-State Batteries Are Safer
The shift from liquid to solid electrolytes brings three major safety improvements. First, there’s no flammable liquid inside the battery pack to ignite under stress. Second, solid materials can better contain internal faults without escalating into a fire. Finally, the structure itself is more robust, making the batteries less vulnerable to damage in collisions or accidents.
These benefits align neatly with new global fire safety standards, particularly China’s recent two-hour fire resistance requirement. Traditional battery chemistries — even those found in premium EVs today — may struggle to meet such tough demands without significant redesigns.
The Advantages Of Solid State EV Batteries
Safety is just one part of the appeal. Solid-state batteries also promise big gains in driving range and charging speed, two key factors for UK drivers considering the switch to electric.
Because solid materials allow for a denser packing of energy, EVs equipped with solid-state batteries could achieve ranges well beyond the 300–350 miles typical of today’s best models. Some experts even suggest ranges of over 500 miles on a single charge could eventually become standard.
Charging times would also fall dramatically. While today’s EVs often require 30–60 minutes to achieve an 80% charge at rapid chargers, future solid-state batteries could do the same in as little as 10–15 minutes.
Add in longer overall battery lifespans and the potential for lighter, more efficient vehicles, and it’s easy to see why the industry is investing so heavily in this technology.
Who’s Leading Solid State EV Battery Tech
The global race to bring solid-state batteries to market is well underway, but it’s a marathon, not a sprint.
Toyota is seen as a frontrunner, having invested heavily in the technology over the past decade. The Japanese giant plans to unveil a production-ready solid-state hybrid vehicle before 2028. BMW and Solid Power, a US battery startup, are also pushing forward, with BMW aiming to show off a working solid-state EV prototype by 2025. Nissan, meanwhile, has pledged to launch its first solid-state EV before the end of the decade.
Startups such as QuantumScape are making significant strides too, although solid-state technology is still considered very much in its early stages of commercial readiness.
The Roadblocks to Overcome
For all their promise, solid-state batteries still face major challenges before they become mainstream.
Manufacturing solid-state cells reliably and at scale is extremely difficult. Even small imperfections during production can ruin battery performance, which drives up costs. Right now, producing a solid-state battery can cost up to three times more than a traditional lithium-ion pack — making them suitable only for premium models in the short term.
Durability is another concern. Some solid electrolyte materials can develop microscopic cracks during charging cycles, which could degrade the battery’s performance over time. Research into new solid materials — and techniques to prevent cracking — is progressing rapidly, but it remains a hurdle.
There’s also the question of cold weather performance. Some early designs struggled in low temperatures, which would be a serious drawback in colder parts of the UK. Manufacturers are working on solutions to make solid-state batteries more versatile across a range of climates.
What Will Solid-State Mean for UK Drivers
When solid-state EVs finally arrive on UK roads, they could transform electric car ownership.
Longer ranges and faster charging could finally put an end to “range anxiety,” encouraging more drivers to make the switch from petrol and diesel. Safer, more durable batteries could also lead to lower maintenance costs and possibly cheaper insurance premiums over time.
The used EV market could see a major boost too. If solid-state batteries can maintain 80–90% of their original capacity over hundreds of thousands of miles, second-hand buyers would gain greater confidence that they’re investing in a long-lasting vehicle.
Until then, it’s crucial to have support in place when driving an EV, especially given the early growing pains of new technology. Choosing from the best EV breakdown cover providers is one way to get peace of mind if anything unexpected happens on the road, also making sure you have a comprehensive EV insurance policy in place is another key thing to do.
Solid-state batteries aren’t just an incremental upgrade; they have the potential to revolutionise electric driving. With superior safety, longer range, and faster charging, they address almost every significant hesitation that today’s drivers might have about going electric.
However, real-world availability is still several years away. Most experts agree that we’re unlikely to see mass-market solid-state EVs in UK showrooms until the late 2020s at the earliest. Premium models will likely come first, followed by broader adoption once production becomes cheaper and more efficient.
In the meantime, today’s EVs are already remarkably safe and capable — and thanks to innovations like solid-state batteries on the horizon, the future of electric motoring looks even brighter.
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John is the Editor and Spokesperson for Electric Car Guide.
With over 20 years of writing experience, he has written for titles such as City AM, FE News and NerdWallet.com, covering various automotive and personal finance topics.
John’s market commentary has been covered by the likes of The Express, The Independent, Yahoo Finance and The Evening Standard.
