High-voltage lithium battery storage system uses Samsung SDI cells

May 19, 2017 //By Nick Flaherty
Power storage system maker Tesvolt (Lutherstadt Wittenberg, Germany) has developed a new lithium battery storage container for renewable power stations using prismatic cells from Samsung SDI.

The system employs a newly developed container module for both indoor and outdoor environments, protecting the storage unit from the weather. The system has a service life of 30 years and 8,000 charge cycle and the largest container can hold up to 02.02MW of power.

“The TESVOLT Power Storage system allows us to ensure a secure power supply for major consumers all the way from the tropics to Alaska,” said Daniel Hannemann, Managing Director of TESVOLT. The containers are insulated and air conditioned, enabling them to provide constant environmental conditions in temperatures ranging from -40° to +55° Celsius. As a result, the storage systems no longer need to be installed in closed, air-conditioned rooms, and they can achieve consistently high performance levels even in challenging environments such as factories, barns or the open outdoors.

The battery systems can be transported by road or sea in standard ISO container sizes of 6.1, 12.2 or 13.7m (20, 40 and 45ft). Once at the installation site, all that remains is to connect the unit to a Central Storage System from German developer SMA Technology, which can also be supplied as a container module.

“The TESVOLT Power Storage system is our solution for all commercial and industrial operations where storage systems of 0.5 MW and above are of interest, but for which issues of cost or installation have been a big concern until now. Enormously high power density, guaranteed charge cycles, and a simple, standardised construction make it one of the most cost-effective systems for megawatt applications on the market,” said Hannemann. With market prices for peak-load power currently ranging from 80 to 140 euros per kW, and the cost of supplying operating reserves commanding up to 160 euros per kW, such systems are extremely worthwhile investments and achieve energy payback times of 4 to 6 years in the European market, he says.

A discharge rate of 1C makes the TPS suitable for both on- and off-grid applications such as