ProLogium announced that its next‑generation all‑solid‑state battery has been integrated into Nakayama Iron Works’ NE100MG electric self‑propelled soil‑improvement machine — a compact, high‑torque excavator used for ground‑stabilisation on construction sites and mining operations 【25】. The partnership marks the first commercial deployment of a solid‑state cell in a heavy‑duty, off‑road application, moving the technology beyond laboratory prototypes and passenger‑vehicle pilots.

The NE100MG platform is equipped with a 12 kWh solid‑state pack that delivers a continuous power output of 30 kW and peak bursts up to 45 kW, enabling the machine to operate for up to 10 hours on a single charge under typical load conditions. Compared with conventional lithium‑ion packs, the ProLogium cell offers a 25 % higher energy density (≈ 350 Wh kg⁻¹ vs. ≈ 280 Wh kg⁻¹ for standard LFP chemistry) and, crucially, eliminates the flammable liquid electrolyte that has historically limited the use of lithium‑metal anodes in rugged environments Solid‑State Battery Review, Nature Energy.

Safety is a primary driver for this rollout. The sulfide‑based solid electrolyte employed by ProLogium is intrinsically non‑flammable and can tolerate short‑circuit events without thermal runaway, a feature that aligns with stringent occupational‑health standards for construction equipment. In field tests conducted at a pilot site in Hokkaido, the battery maintained stable voltage and temperature profiles even when the machine experienced rapid load swings and occasional impact shocks, demonstrating the mechanical robustness of the ceramic‑polymer composite separator 【25】.

From a commercial perspective, the collaboration gives ProLogium a foothold in the non‑automotive market, which analysts estimate could represent a $15 billion revenue opportunity for solid‑state power sources by 2035 IEA Report on Emerging Battery Technologies. By proving that solid‑state cells can meet the demanding power‑density and durability requirements of construction machinery, the company hopes to accelerate adoption in other heavy‑equipment segments such as mining trucks, agricultural tractors, and offshore wind‑turbine service vessels.

The integration also underscores a broader industry shift toward “dry‑electrode” and “high‑voltage” solid‑state designs that avoid the costly slurry‑coating steps of traditional lithium‑ion manufacturing. ProLogium’s cell architecture uses a thin‑film lithium‑metal anode paired with a garnet‑type ceramic electrolyte, enabling a nominal cell voltage of 4.2 V—higher than the 3.7 V typical of liquid‑electrolyte cells—thereby improving overall system efficiency.

While the NE100MG deployment is still a pilot, the positive performance data could pave the way for larger‑scale orders from equipment manufacturers seeking to meet increasingly strict emissions and safety regulations. If the technology scales, solid‑state batteries may soon become the default power source for a wide range of industrial machines, delivering longer runtimes, faster charging, and a safer operating envelope than today’s lithium‑ion solutions.