nickel hydrogen battery from Enervenue

Enervenue have taken a NASA technology and commercialised the Nickel hydrogen battery which is a steel vessel, with up to 1.2kWh per vessel. These are stacked into a container or similar. Key features include

  • 30,000 cycles
  • 3 times daily cycle
  • Less than 8% degradation after 20 years or 20,000 cycle
  • No fire suppression needed
  • No risk of thermal runaway
  • No risk of fire propagation
  • Significantly superior capacity degradation characteristics than equivalent designed Li-Ion (LiFePO4) system.
  • DC round-trip efficiency (RTE) of 90.25% compared to a Li-Ion (LiFePO4) system’s 97.68%,
  • No requirement to oversize battery capacity compared with alternative technologies
  • No HVAC required.

Commercialisation Progress

They have raised money and are ramping up.

  • The first phase of the project will encompass one GWh of annual production
  • Construction of a 92,00 m2 facility on a 30ha site in Kentucky.
  • Target 5GWh by 2025
  • Expects to invest in excess of $1 billion to expand to more than 20 GWh per year by 2030.
  • Has more than 7 GWh of customer commitments,
nickel hydrogen battery from enervenue
From Enervenue White Paper
Proposed racks of vessels in a building.

Low Degradation Key for Nickel Hydrogen Battery

A key feature of NiH battery is the less than the 8% degradation over 20 years that means that the system can be sized half the size of an equivalent LFP battery

Degradation of nickel hydrogen battery
From Enervenue White Paper

Is the Battery Competitive?

The comparison with a LFP battery system has a number of challenging assumptions. The initial capital cost for a 112 MWh battery is higher. The cost over 20 years is 15% lower because the NH battery has less degradation over time.

  • The analysis does not account for the continued downward reduction in battery costs. A decade would see the cost of batteries reduce by 2x. So in 10 years time, would it not be cheaper to expand the total system with a new battery, and there are dozens around.
  • There is a premium for the cycling capacity. This may not be a requirement for a grid arbitrage systems.

Enerveue cost comparison from nickely hydrogen battery
Enervenue white paper.