Honda trialling solid-state battery production, could double EV range

At least, that’s what the automaker’s claiming; its pilot assembly line starts up January 2025, with a mainstream roll-out set for the late 2020s

  • Honda will start turning out solid-state batteries from a pilot production line in January 2025
  • The tech, considered a holy grail for EVs, would permit much higher energy densities
  • Honda hopes to make it viable by the end of this decade, and says it could double EV ranges

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One of the main hurdles for many customers considering an all-electric vehicle is the total driving range available – or lack thereof – on a fully charged battery. The distance of roughly 450 kilometres seems to be a pretty good baseline these days, at least without installing enormous batteries the size of Vancouver Island (ahem, Chevrolet Silverado EV, ahem).

Numerous companies have been working on so-called solid-state batteries, units which do a much better job in the field of energy density than the technology currently available, such as liquid-state lithium-ion batteries. This week, researchers from Honda outlined their desires in this arena, hoping to use solid-state tech to double the range of the automaker’s EVs by the end of this decade.

All-electric 2020 Honda e
All-electric 2020 Honda ePhoto by Honda

Over the next five years, Honda hopes to cut battery sizes in half while chopping at least 25% of the cost from the things. Basic math tells us doubling the energy density of a battery and halving its size means a company could package a much smaller and lighter battery into an EV without sacrificing any range; or, as would likely be preferred in this market, retain the approximate size of today’s cells whilst cranking total driving range to 900 kilometres or more.

Machines engaged in the roll-pressing process at Honda's demonstration production line for all-solid-state batteries, in late 2024
Machines engaged in the roll-pressing process at Honda’s demonstration production line for all-solid-state batteries, in late 2024Photo by Honda

This would handsomely address concerns about range anxiety, especially if cost and weight are kept under control. Toss in a charging capability that’s at least as good as what is on the market today, and it is likely electric vehicles would become more appealing to a wider variety of shoppers. Of course, EVs aren’t right for everyone, no matter the range or recharge stats — the quicker car companies and governments get that through their heads, the better off we’ll all be.

Honda is open to sharing the tech for a price, saying it has “no reason to refuse” the external sale of its solid-state batteries if such a path is mutually beneficial to it and its partners.

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