Engineering

Cella’s hydrogen storage material is very versatile and can be used in different engineered systems to maximise efficiency and user convenience at different scales. Cella is working with engineering partners to design and prove these systems to prepare for product launches in our target markets.

Static pellet systems (Low Power <6kW)

Cella static pellet power – Suitable for small energy applications such as light unmanned vehicles and soldier-portable power.

Cella static pellet power – Suitable for small energy applications such as light unmanned vehicles and soldier-portable power.

In these systems Cella’s material is formed into small pellets which are held in a matrix of insulating material, built into a single cartridge. Each pellet is individually heated to release the hydrogen.

Features:
  • Two to three times the energy per unit weight compared to lithium-ion batteries
  • Rugged, with no moving parts
  • Simple to use (snap-in)
  • Low pressure and moderate temperatures
  • The cartridge can be formed into any shape
  • Stable with long shelf life

Cartridge systems (Medium Power <20kW)

Larger cartridges of Cella material can be moved from a storage magazine to a heated zone to release the hydrogen,

Larger cartridges of Cella material can be moved from a storage magazine to a heated zone to release the hydrogen,

For slightly larger power or energy applications, Cella packs the material into cylindrical cartridges. These can either be used in a static configuration, like a larger version of the small pellet system, or in a system that moves the cartridges from a magazine to a hot-cell and back.

Features:

Cartridges:
  • At least three times the energy per unit weight compared to Lithium-ion batteries (complete system including fuel cell)
  • Rugged, with no moving parts
  • Simple to use (snap-in)
  • Low pressure and moderate temperatures
  • Stable with long shelf life

 

Flowing pellet systems (High Power >20kW)

Cella’s zero-emission hydrogen fuel is pumped into a car as the spent fuel is removed.

Cella’s zero-emission hydrogen fuel is pumped into a car as the spent fuel is removed.

Cella can also form the material into small millimetre sized coated pellets that can be pumped like a fluid. This makes it possible to move and transport large quantities of material easily and cheaply.

Features:
  • Similar energy per unit volume and weight as highly compressed gas
  • Low cost infrastructure
  • A refuelling experience that is familiar to consumers
  • Ease of transport
  • Low pressures and moderate temperatures
  • Safe to handle
  • Stable with long shelf life

How it works:

The in-vehicle technology employs technology that would be familiar to anyone who has used a vacuum cleaner.
  1. Pellets are stored in a simple lightweight plastic tank
  2. A vacuum pump moves a small batch of pellets to a cell which is maintained at 100°C
  3. The pellets are heated and the hydrogen released to run a fuel cell
  4. The vacuum pump then moves the spent pellets back to a storage tank
  5. The cycle repeats.
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