The Battery Technology
The TEXEL Hybrid battery is developed by TEXEL, by combining innovation and development with collaborations and through the purchase of different technologies. The battery includes a number of key components, where the Stirling converter is one of them. A Stirling converter converts thermal energy to electricity in a scalable way. TEXELs V4-Stirling converter is defined as the worlds most developed, and was originally developed by Ford Motors in cooperation with the company Kockums, which specialises in military submarine manufacturing. TEXEL bought all rights to the converter in 2012.
The thermal battery is another key component in the system, and was originally developed by US Department of Energy and Savannah River National Laboratory. TEXEL signed an exclusive licence agreement for the thermal battery in 2018. After combining the cheapest, most sustainable and circular energy storage solution with the most developed, and efficient Stirling converter, TEXEL is now in the final process of development, commercialization and industrialization of the technology. The battery is expected, according to the US DOE independent report, to reach a cost of storage as low as below 2 cent per kWh already in a low volume production level.
- The thermal battery does not include any Rare Earth Elements (RAE).
- The battery has no degradation problems.
- The battery is 100% circular.
- The technology is 100% recyclable.
- The technology has high energy density.
- The battery is a hybrid battery – it can be charged with electricity as well as produce electricity from any other heat source.
TEXEL is a New Way to Store Energy
The TEXEL battery technology is just another way to store energy. Storing energy in a thermochemical battery, with electric output similar to electrochemical batteries in performance like Lithium-Ion, but much more cost effective. Just like Lithium-Ion, the TEXEL thermochemical battery can be charged by electricity. But it can also be charged by any heat source, such as flared natural gas, and still deliver electric energy. Stored heat energy released from the thermochemical battery to the Stirling Converter forces the generator to produce approximately 40 percent electric energy and 50 percent heat energy, equivalent to 90 percent total energy efficiency.
- High energy density – similar to Lithium-Ion with huge potential to be improved.
- No cyclic degradation.
- No rare earth materials.
- 100% recyclable.
- Long storage duration (+100 years).
- Gas hybrid – no backup systems needed.
Metal Hydride Technology
The TEXEL battery has a hot and a cold side consisting of metal hydrides (special metal alloys and hydrogen), in a cyclic closed process.
When the hot side of the battery is charged with electricity, or any heat source, a chemical reaction is created and the energy is stored in the hot side of the metal hydride. The hydrogen will then move from the hot side to the cold side during this reaction to be stored. The energy is therefore stored in cool conditions, same temperature as it’s surroundings, and can be stored there for 100 years with a very small amount of energy loss.
When the hydrogen stored in the cold side is forced back to the hot side, the thermal energy will be released from the metal hydrides and the hot side becomes hot again. The heat is then transferred into the Stirling Converter that starts to spin, creating kinetic energy that will force the generator to produce electricity.
Gas Hybrid – Guaranteed Energy Production
In order to guarantee a constant supply of energy there is a need for an additional power generation system to create an overall hybrid solution, such as TEXEL’s Gas Hybrid. TEXELs uniquely built-in hybrid solution is based on the battery’s thermal storage technology which enables the battery to be charged with any kind of heat source, such as gas, when there is no access to solar or wind power. Or in the event of catastrophes such as wildfires, earthquakes, terror attacks, etc.. This feature places the TEXEL technology far ahead of existing technologies such as Lithium-Ion, which needs a separate backup system to supply energy 24/7/365.
High Energy Density
The TEXEL battery technology is based on Metal Hydrides, and has more than twenty times higher energy density than other heat storage technologies, such as Molten Salt, and is competitive with Lithium-Ion. The energy density is predicted to be improved dramatically with future development.
The TEXEL battery’s high energy density also opens up for other market segments where space, weight and environmental issues matter.
One Battery – Numerous Applications
The TEXEL battery does not differ much from ordinary electrochemical batteries. One TEXEL unit or cell stores much more energy than ordinary battery cells, and is scalable from smaller applications like a single household or buses, to cities and state grids. Whereas Lithium-Ion batteries scales from phones and laptops to cars.
One battery unit delivers 30kW and can be sized from 30 minutes to 24 hours (15kWh – 720 kWh) of storage. A series of batteries will of course increase the energy output – 10 battery units x 30kW = 300kW with a storage capacity up to 720kWh x 10 = 7.2MWh.