The Potential of Solid-State Batteries in Industrial Robotics
In the ever-evolving landscape of modern robotics, the quest for enhanced efficiency, productivity, and autonomy continues to drive innovation. One of the most significant challenges facing industrial robots today is the limitation imposed by current battery technology. Lithium-ion batteries, while prevalent, often fall short in meeting the power demands required for prolonged operations in factories and warehouses.
According to recent claims, solid-state cells could revolutionize industrial robotics by providing robots with the autonomy equivalent to more than eight hours of human labor. This advancement promises to improve productivity through longer run times and potentially lower overall operating costs.
The Economic Implications of Solid-State Batteries
Despite the promising benefits, the high cost of solid-state batteries remains a crucial factor in their adoption. Currently, modern lithium-ion batteries account for less than 2% of the manufacturing cost of a robot. In contrast, the implementation of solid-state batteries could increase this share to around 8%, representing a significant financial premium that manufacturers need to consider.
Speaking at the 2nd Battery Foundry Forum in Seoul on July 15, 2026, Ko Young-seok, executive vice president and head of product planning at Korean battery maker SK On, highlighted the potential value of solid-state cells for industrial robots needing extended battery life. However, he also noted that manufacturers’ adoption would hinge on the total cost of ownership (TCO) compared to other solutions like battery swapping and ultra-fast charging.
Cost vs. Benefit: A Complex Calculation
The TCO perspective suggests that despite the initial high cost, solid-state batteries may offer a more economical option over time. When evaluating costs, factors such as maintaining spare batteries, charging or exchange times, and potential downtime must be considered. Solid-state batteries may present a lower TCO than current alternatives, even with a higher price tag.
For instance, a teardown of Tesla’s Optimus Gen 2 places the battery cost at approximately $300 within a hardware cost structure of around $55,000, equating to about 0.5% of the bill of materials. This is comfortably below the 2% threshold, although estimates can vary.
The Road Ahead for Solid-State Technology
Solid-state batteries, with their higher energy density, present a promising path toward achieving robots capable of performing continuous human-equivalent tasks. However, given their cost relative to existing solutions, SK On is targeting sectors in robotics and industry where the technology’s benefits justify the investment.
For applications with shorter duty cycles, affordable lithium-ion packs or rapid charging between tasks may remain the most economical choice. However, for those willing to invest in sustained power, solid-state technology emerges as a viable option, despite its elusive nature in commercial electric vehicles due to cost constraints.
SK On is actively advancing this technology, having completed its all-solid-state pilot plant at the Future Technology Institute in Daejeon in partnership with U.S. solid electrolyte company Solid Power. The company is developing two products: a polymer-oxide composite cell slated for commercialization in 2028 and a sulfide-based cell in 2029, with competition from Samsung SDI targeting 2027.
Whether this technology will see widespread adoption remains uncertain, but the TCO argument presented by Ko may resonate more with industrial customers than mainstream electric vehicle buyers, for whom cost remains a key consideration.
For further details, visit TechRadar.
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