Chinese automotive group Geely is accelerating development of one of the most promising technologies for the future of electric vehicles – an all-solid-state battery designed to deliver substantially higher energy density than today’s widely used lithium-ion technologies. The company is moving beyond laboratory development and into testing in real vehicles, with pilot deployment planned for 2027. According to the latest reports, Geely is targeting energy density of up to 500 Wh/kg. If such a figure can eventually be achieved in mass production at an acceptable cost and with sufficient durability, it could enable electric vehicles to travel more than 1,000 kilometres on a charge or allow manufacturers to use significantly smaller and lighter batteries while maintaining today’s driving ranges. Solid-state batteries attract so much attention because of their fundamental design. Conventional lithium-ion cells use liquid electrolytes, while all-solid-state technology replaces them with solid materials. The potential advantages include higher energy density, improved safety and greater flexibility in electrode chemistry. Geely is also working with Dow on specialised materials designed to remain stable across an exceptionally wide temperature range, from approximately minus 40 to plus 120 degrees Celsius. Another striking claim concerns a potential lifespan of up to one million kilometres. This figure needs to be treated cautiously. Independent long-term cycle-life data supporting such durability for Geely’s new solid-state battery has not yet been published, meaning one million kilometres should currently be regarded as a target rather than a guaranteed specification of a production-ready battery.
Geely already has experience developing batteries designed for extremely long service lives. Its earlier Short Blade LFP battery underwent testing involving 3,500 charging cycles, which the manufacturer said could correspond to roughly one million kilometres of driving. The new solid-state project, however, is a different technology, and results achieved with one battery chemistry cannot simply be transferred to another. The major challenge is now proving that the new cells can deliver outside the laboratory. High energy density alone is not enough. An automotive battery must survive thousands of charging cycles, temperature changes, vibration and physical stresses, while also being manufactured in enormous volumes at a price that does not make the vehicle prohibitively expensive. Those challenges are among the main reasons solid-state batteries have taken so long to move toward commercial production. Geely is far from alone in the race. CATL, BYD, Toyota and other major manufacturers are developing competing technologies, with several companies targeting the 2027–2028 period for early or limited deployment. The next few years should therefore reveal which technologies can genuinely make the transition from promising prototypes to industrial-scale production. If Geely eventually achieves the performance it is targeting today, the implications could be substantial. Driving ranges exceeding 1,000 kilometres would put electric vehicles on equal or potentially better footing than many petrol and diesel cars in terms of distance between energy stops. The most important test, however, is still ahead – not what a prototype can achieve, but whether the technology can become reliable, safe and affordable enough for millions of vehicles. Geely’s progress is therefore significant, but the solid-state battery revolution has not reached the mass market yet.
