Why are Echandia's battery systems inherently safe?

When discussing safety, we typically look at three layers:

1. Monitoring and prevention – handled by the BMS and system control logic

2. Mitigation – such as ventilation and fire suppression systems

3. Cell-level safety – the inherent safety characteristics of the battery chemistry itself

All three are important but ultimately, the chemistry and cell design define the battery’s fundamental safety behavior, including its resistance to internal short circuits and thermal runaway.

The role of chemistry for safety

Most lithium-ion batteries share the same basic structure: cathode, anode, electrolyte, and a separator. What primarily differs is the materials used in the cathode and anode, and those choices strongly influence lifetime, power capability, and safety.

Echandia uses LTO (lithium-titanate / lithium-titanium-oxide) because it is well suited for heavy-duty maritime applications. LTO is often described as lower in energy density than other chemistries, but on a system level it can still be compact because it enables:

• High usable depth of discharge over long lifetime

• Less oversizing and buffer capacity

• Stable performance in real-world cycling

For operators, this means predictable performance, long lifetime, and increased safety without complex system design.

Why LTO is safer than conventional lithium-ion

LTO uses lithium-titanate in the anode instead of graphite. That single difference creates several important safety advantages:

No dendrite build-up (lower risk of internal short circuits)

Dendrites are metallic lithium structures that can grow inside a battery over time. They are difficult to detect and can eventually pierce the separator, causing an internal short circuit which is a key trigger for thermal runaway in many battery chemistries. LTO has a much lower tendency to form dendrites because lithium insertion happens at a significantly higher voltage than in graphite-based anodes. This provides a wider safety margin during fast charging and charging in cold temperatures.

Minimal swelling and mechanical stress

Most lithium-ion batteries expand and contract as they charge and discharge. Over time, these volume changes stress the cell materials, increasing degradation and raising the likelihood of failure. LTO has a very stable structure with near-zero volume change, which improves both lifetime and robustness under demanding conditions.

Safe fast charging and strong low-temperature performance

Fast charging is a major operational requirement in marine applications, but it can increase stress and risk in many chemistries. LTO is designed for high charge rates and maintains stable behavior even in low temperatures (down to approximately -20°C) without the same risk profile as conventional lithium-ion chemistries.

Inherent short-circuit protection (self-protecting behavior)

In severe events such as cell penetration or unexpected internal contact, LTO has an additional safety advantage. The cell chemistry can form an insulating layer at the short-circuit point, limiting current flow and helping stop escalation.

LTO is inherently safe because the cell chemistry reduces the main root causes behind battery failures: dendrite growth, swelling, and unstable behavior during fast charging or temperature extremes.

For maritime operators, this translates to:

• Higher system safety margin

• Long lifetime performance and high cycle capability

• Reliable operation in demanding environments

• Reduced need for oversizing and complexity

This is why Echandia has chosen LTO as the foundation for our maritime battery systems.