OXIS Energy Teams With Multi Source Power For Marine Lithium-Sulfur Batteries

AUG 17 2014 BY MARK KANE 4

OXIS Lithium Sulfur pouch cell

OXIS Lithium Sulfur pouch cell

OXIS Energy, founded in 2005 and based out of the Culham Science Centre in Oxfordshire, UK, announced a new partnership with Multi Source Power Technologies- a start-up founded in 2013 by Simon Patterson, an experienced hybrid and electric marine drive train designer.

The main topic of cooperation is to develop lithium-sulfur battery system for marine applications.

We are of course very curious about that project because Li-S batteries are expected to be useful in electric cars.

“OXIS and MSP will launch the new battery in the spring of 2015. One of MSP’s specialities is designing and manufacturing battery packs and hybrid power and propulsion systems for the marine industry.  Integrating OXIS’s expertise in the development of the next generation of cell technology allows them to develop lithium sulfur rechargeable battery systems for the marine market.”

This development will be part of the Ghost Power Brand. It will be a versatile battery system scalable from 20 kWh to 50 kWh upwards and will provide multiple configurable voltage outputs that will not only power electric motor boats, but can also be used to power air conditioning systems, navigation systems etc.  The battery will be designed for Lloyd’s Register Group approval which will give confidence and assurance to customers whilst at the same time, it will help to lower expensive insurance premiums.”

Comparison of different technologies by OXIS Energy

Comparison of different technologies by OXIS Energy

20-50 kWh battery packs would be good for cars, but before you get excited by 200 or even 300 Wh/kg “achieved at cell level in 2014“, we checked some details in specifications.

Ultralight Cell has energy density over 300 Wh/kg, but cycle life (80% DoD) at just 200 to 80% of capacity. Long- life Cell can withstand 1,000 cycles, but energy density is just 160 Wh/kg.

For 2016, expected is EV Cell with 400 Wh/kg and 615 cycles, which would probably be the most interesting for EV applications.

Huw Hampson-Jones, CEO of OXIS said of the new partnership:

“I’m delighted to be able to announce this partnership with MSP.  MSP has a strong pedigree in electric boat building expertise coupled with in-depth battery experience. It has a quality team working to develop the ideal battery solution for the electric boat market and we are very happy that its quality and safety focused team has chosen OXIS’s lithium sulfur technology. The inherent safety of OXIS’s cell technology, along with its lightness provides MSP with a strong competitive advantage for Marine battery systems.”

Simon Patterson, CEO of MSP stated:

“Lithium Sulfur technology is the ideal solution for the marine industry, combining safety and lightweight aspects. The OXIS battery technology provides the highest levels of safety our customers demand.  Developing a battery system with Lloyds’ approval will be extraordinary, demonstrating not only industry confidence in the product, but also reducing insurance premiums. Furthermore, lithium sulfur cells are already lighter than the lightest lithium-Ion technology and the overall weight reduction provides significant improvement to both the capacity performance and efficiency of the battery technology.”

Here are videos from some laboratory tests of OXIS Energy cells:

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4 Comments on "OXIS Energy Teams With Multi Source Power For Marine Lithium-Sulfur Batteries"

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The chart look like a rather old one, with the Oxis cells added. Li-NCA is up to around 260 Wh/kg, but the Wh/L number is more relevant. The 2016 Oxis cell looks competitive, but that will depend on execution and price.

Optimistically, perhaps by 2020 or so they could show up in EVs.

…./me wonders what an EV Chris Craft Barrel Back Runabout replica would be like….

The EV cell is a good goal (400Wh/kg) but it may take a while to get that cell from finished prototype to inside EVs. Especially if it has such a low volumetric efficiency (450Wh/L) compared with today’s cells. You could make a very light 200 mile battery for a sedan but you’d run out of space to store the batteries, unless you can remove some of the cell protection hardware because Li-S is safer than Li-Ion.

For my boat, I’m less concerned about energy density than about price per kWh and battery longevity. It doesn’t matter if the battery is heavy – the boat already weighs 2500 lbs (displacement hull, not planing). I just don’t want it cost me an arm and a leg over time.

I currently use Li NMC batteries, and I am happy with them except the replacement price.