OXIS Energy and Lithium Balance partner on Li-sulfur battery system for China e-scooter market; targeting spring 2018
Li-sulfur battery developer OXIS Energy UK (earlier post) and Lithium Balance of Denmark are partnering to build a prototype Lithium-sulfur battery system primarily for the e-scooter market in China. Lithium Balance is a battery management expert which has supplied its BMS systems for Li-ion based e-scooters for a decade. The E-scooter itself will be manufactured in China.
The current prototype battery has a capacity of 1.2 kWh using 10Ah OXIS Long Life cells; weighs 60% less than the current lead acid battery; and delivers a significant increase in range. The next stage is to build a second prototype using an improved Long Life chemistry (up to 20Ah) which will increase battery capacity at a reduced weight.
The current 2.1V, 10Ah long-life cell features a gravimetric specific energy of 152 Wh/kg, and volumetric energy of 141 Wh/L, with a cycle life of 1,400 cycles.
Crucially, production costs will be reduced to meet the demand of the Chinese market. The timescale for this second phase is the fourth quarter of 2016.
The volume of E-scooters in China is 30 million, of which 98% use lead acid with the remaining 2% using Lithium-ion.
The development of the first Lithium Sulfur e-scooter battery system will allow Chinese manufacturers to circumvent the use of unsafe, toxic and environmentally damaging battery systems such as lead acid and Lithium-Ion. It will allow Chinese consumers to travel longer distances with a significantly greater degree of safety and flexibility and with a battery system that’s 60% lighter—the latter being very important to Chinese commuters living in high rise city apartments. In effect, the market of rechargeable lithium batteries will undergo a quantum leap forward in the adoption of state of the art renewable energy technology. This will contribute to cleaner air quality in the major urban areas of China.—Huw Hampson-Jones, OXIS CEO
This project represents a technology breakthrough for Lithium Balance. In cooperation with OXIS Energy we have implemented dedicated BMS algorithms that optimizes the performance of Lithium Sulfur batteries. This could not be achieved with an ordinary Lithium-Ion BMS.—Lars Barkler,Lithium Balance CEO
OXIS and Lithium Balance are on track to have their battery systems in China by the spring of 2018. This reflects the results of an existing £2-million (US$2.9-million) investment made by OXIS into new processes and production machinery in preparation for mass production of Lithium-sulfur cell technology.
OXIS Energy has been involved in the design, development and now the move towards commercial production of Polymer Lithium Sulfur cells for electric vehicle battery systems since 2004. It has been granted 79 patents with 93 pending. The chemistry and technology is inherently safe and biodegradable. OXIS says it has demonstrable empirical data justifying its claim on the inherent safety of its battery technology.