3ME, Rio Tinto ArcFlash tests and Toshiba LTO: safety design notes for mine fleets
Reviewed by Tom Sullivan
First reported on International Mining – News
30 Second Briefing
3ME Technology has completed what it calls a world‑first DC ArcFlash testing programme with Rio Tinto on high‑voltage battery systems for mining fleets, generating empirical data on arc energy, blast pressure and thermal effects to refine PPE categories and enclosure designs. In a parallel development, 3ME is collaborating with Toshiba to integrate lithium titanate oxide (LTO) cells into its Bladevolt battery platform, targeting fast‑charge, high‑cycle underground mining vehicles. The work directly informs electrical protection coordination, battery pack architecture and risk assessments for diesel‑to‑battery conversions.
Technical Brief
- DC ArcFlash tests were conducted on complete high‑voltage battery packs, not just individual cells.
- Empirical arc data are being tied into existing electrical isolation and lock‑out/tag‑out procedures.
- Results are intended to refine site‑specific arc flash labels, approach boundaries and PPE categories for maintainers.
- Testing outcomes will inform enclosure venting, blast‑relief and segregation requirements in battery pack housings.
- LTO chemistry selection is driven by underground duty cycles requiring frequent fast‑charge and high cycle life.
- Work provides a template for DC arc characterisation of other high‑voltage battery systems in mining and tunnelling.
Our Take
Within the 2084 tag-matched pieces on Projects, Safety and Product, very few items involve battery OEMs like Toshiba working directly with mining-focused suppliers such as 3ME Technology, signalling that this is still a relatively early-stage pattern in electrified mining fleets.
Rio Tinto’s involvement gives 3ME Technology a route to validate LTO-based systems against Tier-1 miner safety requirements, which in our database often becomes a de facto benchmark for smaller operators when they later procure battery-electric equipment.
LTO chemistries are typically chosen in mining for their cycle life and thermal stability rather than pure energy density, so this collaboration positions 3ME Technology more towards heavy-duty underground or high-duty-cycle applications rather than long-range surface haulage.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
Related Articles
Related Industries & Products
Mining
Geotechnical software solutions for mining operations including CMRR analysis, hydrogeological testing, and data management.
Tunnelling
Specialised solutions for tunnelling projects including grout mix design, hydrogeological analysis, and quality control.
CMRR-io
Streamline coal mine roof stability assessments with our cloud-based CMRR software featuring automated calculations, multi-scenario analysis, and collaborative workflows.
QCDB-io
Comprehensive quality control database for manufacturing, tunnelling, and civil construction with UCS testing, PSD analysis, and grout mix design management.
HYDROGEO-io
Comprehensive hydrogeological testing platform for managing, analysing, and reporting on packer tests, lugeon values, and hydraulic conductivity assessments.