Rechargeable Lithium Sulfur batteries have a wide range of applications due to their light weight, high gravimetric energy density and inherent safety.

A diverse set of applications.

OXIS Energy is targeting a small range of applications where the benefits of Li-S batteries will demonstrate performance best. These are described in more detail below along with the grant funded projects that support this work.
Once market entry has been achieved, further development of the chemistry will widen the use of Li-S cells to other sectors such as consumer devices.

Our current applications

Key features
  • Ultra-lightweight
  • Perfect for HALE UAVs
  • Enables electric aircraft
  • Also suitable for space sector

Aviation

Weight is of upmost importance in aircraft and Unmanned Aerial Vehicles (UAVs) because the heavier they are, the more energy is required to keep them airborne. OXIS Li-S batteries can offer a crucial advantage here as they are lighter than any Li-ion solution.

OXIS is currently developing a 400Wh/kg cell in its flagship Centurion project, which will make high altitude long endurance (HALE) UAVs a reality. This will allow these aircraft to provide interconnectivity services to the developing world and help bring 2 billion people online.

Looking out to the rest of the aerospace market, this 400Wh/kg cell could also be adapted for use in smaller UAVs, as well as make passenger electric aircraft a reality. In the adjacent Space sector, ultra-lightweight cells are also suitable for use in launcher and satellite applications. Work to achieve this is being supported by the Horizon 2020 EU funded project ECLIPSE to develop a 400Wh/kg cells for satellites with support from Airbus, Saft, Fraunhofer and CEA.

Key features
  • Lightweight
  • Low cost
  • Safe

The two largest challenges to the mass adoption of electric vehicles are range anxiety and safety.

The automotive industry is interested in high specific energy batteries to help increase vehicle payload and range. OXIS is working on two major projects to develop a Li-S cell for the automotive market.

In the Revolutionary Electric Vehicle Battery (REVB) project, OXIS is driving research forward to develop a 400Wh/kg cell for a battery electric vehicle (BEV) and developing world leading simulation models of the chemistry. OXIS is working with Imperial College London to develop electrochemical models of the chemistry and with Cranfield University and Ricardo to develop control models and a demonstration battery pack respectively. The project is co-funded by Innovate UK.

In the Advanced Lithium Sulfur for xEV (ALISE) project, OXIS is working with Leitat, SEAT and 12 other partners to develop 400Wh/kg and 500Wh/kg cells for Hybrid EVs. OXIS is working with the partners to push new boundaries in materials research to increase energy density, power performance and cycle life to develop these new cells. The project is funded by the European Commission.

Low cost, safe batteries are also an integral part to both of these development projects, and OXIS is striving to achieve both, with a stated battery cost target of $250/kWh for the REVB project at mass production scale.

Light electric vehicle batteries have been key to OXIS Energy to demonstrate the Li-S technology on an end user application. This market segment is also considered as a pre-cursor to the deployment of full electric Li-S battery systems for 4 wheeled passenger vehicles.
The development of the Long Life chemistry offering high safety and cycle life is our product of choice for this application. The first Li-S battery was developed for electric bikes. It is a 360 Wh system weighing only 2kg. We then developed an 11 kWh Li-S battery for the autonomous driverless shuttle vehicle. It consisted of 2 identical modules, each weighing 50kg including the box, for easy integration. The modules are configured as a Master and Slave unit so that they can be installed at separate locations in the vehicle.

Recently, OXIS has entered the electric scooter segment and target to introduce Li-S batteries into the Chinese market in the autumn of 2017. In cooperation with our BMS partner Lithium Balance, we have already built, and tested on an e-scooter, the first prototype 1.2 kWh Li-S battery system using Long Life 10 Ah cells. This weighs 60% less than popular lead acid batteries which represent 95% of the Chinese market. The next stage is to build a second prototype using an improved Long Life chemistry (up to 20Ah cell) which will increase battery capacity at a reduced weight and, crucially, boost the range of the electric scooters.

Key features
  • Lightweight
  • Safety
  • Cycle life: over 1500 cycles projected

Solar energy storage has become a rapidly growing market, the key driver for which is the need to reduce energy bills.

Energy Storage has become a rapidly growing market, driven by an increasing share of renewable energy generation. This changing mix of energy production has created new problems to ensure grid supply and minimise electricity bills. Energy Storage provides an effective solution for grid stabilisation, power generation management and residential storage. Industry and consumers want a cost effective solution that is safe, easy to install with minimal maintenance.

OXIS Li-S technology offers the perfect solution to these problems. OXIS has already built and proven prototype batteries for these application. The OXIS Rack Mount Battery (RMB) is a 3 kWh 48V unit that can be used individually or scaled to large MWh solutions and will be available in 2017.

Key features
  • Lightweight
  • Safe
  • Maintenance free
  • 100% Depth-of-Discharge

Lightweight batteries reduce the load on soldiers.

On the battlefield, soldiers frequently have to carry a heavy burden due to the assortment of electronic systems, ammunitions and food supplies. With batteries usually weighting more than 10kg alone, reducing this burden is a key priority for the defence industry. OXIS innovative lightweight cells are ready to power the next generation of soldiers on the field and will significantly reduce this burden.

In fact, OXIS cells are not only lighter but they are safer too. Being able to withstand bullet and nail penetrations with no adverse reactions and no significant rise of temperature, the OXIS technology is perfectly suited to offer critical power to soldiers having to operate in extreme temperatures and harsh conditions.

Key features
  • Lightweight
  • Naturally Buoyant
  • High Energy Density
  • Pressure Tolerant

Marine

Li-S technology can offer increased specific energy, increased safety and lower mass density of the cells which would constitute a major development for the powering of Marine Autonomous Systems (MAS), particularly those systems requiring longer endurance and higher speeds at greater depth. Li-S cells can have significantly improved buoyant specific energy compared to current Lithium Polymer cells used by state-of-the art deep-diving MAS, unlocking additional applications across the maritime industry. Li-S technology can also serve all deep-sea mining and offshore oil and gas applications, where energy density is a factor enabling longer operations, improved buoyancy and greater payload capacity.
Oxis also aims to address maritime defence opportunities and the increasing demand from the Oil and Gas sector. Maritime monitoring and surveillance using MAS will improve the situational awareness of activities at sea impacting on maritime safety, border control, fisheries control, trade and economic interests of the European Union as well as general law enforcement.

Key features
  • Ultra low temperature operation
  • High specific energy

Low Temperature

Specialist users need specialist batteries for the extreme conditions in which they operate. OXIS is working with Hyperdrive Innovations and the British Antarctic Survey (BAS) to develop a Li-S cell that can operate at -80°C at the South Pole. A high energy density cell is essential in this environment, as supplies have to be flown into location by a number of bunny hops by transport aircraft. Lighter batteries will mean that BAS can carry much more equipment.

Most batteries completely shut down and fail to work at low temperature due to the components freezing and preventing the chemical reaction from taking place. OXIS has already shown with its work on the Ultra Low Temperature Battery (ULTB) project that the Li-S chemistry can work at extreme low temperature and is optimising the performance to allow cells to be used to power scientific test equipment in Antarctica.