Rio Tinto battery swap trial advances low-emission mining

Rio Tinto Battery swap

Rio Tinto battery swap trial at Oyu Tolgoi signals a step-change in low-emission surface mining. The Rio Tinto battery swap trial, launched with China’s SPIC Qiyuan, will test electric haul trucks in demanding operating conditions. As a result, the Rio Tinto battery swap trial could become a blueprint for fleet decarbonisation across global open-pit operations.

Battery swap technology at Oyu Tolgoi

The Rio Tinto battery swap trial introduces electric haul trucks that can change batteries in under seven minutes. Battery swapping avoids long fast-charging pauses and keeps haul trucks in near-continuous operation. Over the past year, Rio Tinto and SPIC Qiyuan deployed eight 91t Tonly trucks, 13 800kWh batteries and a swap station. This infrastructure also includes a static charger and supporting grid connections at the Mongolian copper mine.

The trial will initially support tailings dam construction and topsoil movements at Oyu Tolgoi. These tasks provide repeatable cycles that are ideal for testing battery performance and swap logistics. Meanwhile, the project will generate real-world data on duty cycles, energy use and maintenance needs. That data will be critical for scaling battery swap systems into harsher and deeper mining environments.

Scaling battery swap across Rio Tinto’s global truck fleet

Rio Tinto sees its 700-truck global fleet as a major opportunity for wider battery swap deployment. If successful, the Rio Tinto battery swap trial could enable progressive replacement of diesel trucks in high-volume pits. Battery swap systems also align with grid-connected power strategies at large copper and iron ore operations. However, scaling will depend on local power availability, grid stability and renewable energy penetration.

Partnership with SPIC Qiyuan gives Rio Tinto access to China’s fast-moving battery and power electronics ecosystem. Chinese suppliers have already commercialised battery swap technology in logistics and urban transport fleets. Therefore, this mining-focused collaboration may accelerate standardisation of battery packs, swap stations and digital control platforms. That standardisation would reduce costs and support adoption by other global mining companies.

The Metalnomist Commentary

This trial confirms that decarbonising mining fleets is shifting from concept studies to large-scale pilots. Battery swap technology addresses one of mining’s hardest problems: keeping heavy haulage electrified without sacrificing productivity. If Oyu Tolgoi proves the model, expect copycat projects in copper, iron ore and coal, especially where grid power and renewables are available.