Solid-state batteries are becoming less of a hype and more of a reality. One of the main actors in the pioneering technology, QuantumScape, launched its battery pilot line.

A milestone in setting up and scaling production is widely regarded as the biggest hurdle for this heralded technology. The promise is finally becoming a product. And QuantumScape’s announcement didn’t go unaccompanied.

The California-based firm, heavily backed by Volkswagen and hailed as a future disruptor in the electric vehicle sector, has spent 15 years developing what it claims is a breakthrough solid-state lithium-metal battery.

QuantumScape doesn’t belong to the group of overpromising bigmouths in the battery sector, but has been working modestly yet enduringly on its solid-state cells.

Automated production

Last week came a watershed moment as it unveiled the ‘Eagle Line,’ a highly automated pilot production facility meant to prove one thing: these elusive batteries can, in fact, be made at scale.

But the Eagle Line is no ordinary factory. It doesn’t aim to churn out battery packs for mass production. Instead, QuantumScape sees itself as a licensor, not a manufacturer.

The purpose of its assembly line is to demonstrate that others (automakers, energy firms, and industrial partners) can adopt its blueprint and replicate it at volume in their own gigafactories. 

Karma Automotive

This strategy stands in contrast to that of other successful rivals, such as Factorial Energy, which one might recognize from its tie-up with Mercedes. Almost simultaneously with QuantumScape’s inaugural event, the firm announced an agreement with Karma Automotive. Both partners will bring to market US-produced solid-state batteries to a commercial passenger car by next year.

Back to QuantumScape and its seductive pitch. Solid-state is smaller, safer, faster to charge, and significantly more powerful than today’s lithium-ion equivalents.

Central to its technology is a ceramic separator that can be processed in minutes, a feat the company says took four years of intense R&D, and which is called the Coba process. The separator is the heart of the solid-state cell, offering better ion conductivity than conventional liquid electrolytes while eliminating fire concerns.

‘Five orders’

CTO at QuantumScape, Tim Holme, paints the company’s journey as one of improbable scaling. Moving from benchtop prototypes to factory-grade production, he says, involves solving engineering challenges across many orders of magnitude. “You start with a lab demo,” he said, “then you need a hundred people working a year. That gets you five orders. You still have eight to go.”

The Eagle Line represents a solution to that problem and a test. With 14 robotic systems working in tandem to build cells using QS’s Cobra process, the line is a fully functional demo.

And, as mentioned above, not just for the batteries themselves, but for a future manufacturing model others might adopt. VW’s PowerCo division is already deeply embedded, with two board seats and dedicated engineers shadowing the process.

As a niche, might this prove a gateway to uplift battery production in Europe? Volkswagen might make that happen. As for now, prototypes (B samples) are being made; C samples from production-level partners are expected to follow.

Slightly behind

Nonetheless, QuantumScape is slightly behind others who are rushing to be first. Factorial’s solid-state cells have already powered a prototype of the Mercedes-Benz EQS in a more than 1,200-kilometer single-charge journey.

Stellantis plans to test Dodge Charger EVs with solid-state tech this year. Toyota, Nissan, and BYD all expect to launch solid-state-equipped vehicles by 2028.

Yet being first might not bring home the victory. Analysts warn that few companies will manage to produce more than 50,000 vehicles with solid-state packs before the decade is out. The costs are still steep, and manufacturing remains staggeringly complex. 

That’s where QuantumScape bets it can outpace competitors. By not chasing output now and instead refining a license-ready system that others can deploy, it hopes to scale faster indirectly. Its production partners, it believes, will move more quickly with a pre-tested roadmap than if they started from scratch.