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SUNBATT

Relevant project information

Dates

December 2014 - December 2015

Project website

Project completed

Role of CIRCE

Partner

Grant agreement number

CP_NAC_ENDESA_2016_SUNBATT_1

Funded by

endesa logo

Description and objectives

The SUNBATT project has developed a LivingLab in which to study and monitor the behavior of the second life batteries of electric vehicles. This LivingLab is located in the SEAT facilities in Martorell and connected to a micro distribution network with solar generation and electric vehicle chargers.

For the realization of this demonstrator, it has been necessary to manufacture and design the container or energy storage, which houses four second-life EV batteries and two 20kW bidirectional converters, which are connected to the SEAT batteries and allow the charging/discharging of these batteries on the grid.

On the other hand, being a LivingLab, the entire demonstrator is monitored and managed by a SCADA system. This system communicates with an optimizer, which, depending on the operating mode, is responsible for decision making and management of the demonstrator using intelligent algorithms based on economic optimizations.

Value proposition

The main objectives achieved by the project have been:

  • Validation of the technical feasibility of the integration of second life batteries into the electrical grid, by means of bidirectional converters and specific communication protocols developed in the Project.
  • Manufacture of a demonstrator in which multiple tests of second life batteries can be carried out. This demonstrator will be used to experimentally validate both the use cases defined in the project and the effect of these use cases on the aging of second-life batteries.
  • Drafting of specifications for the development of 20kW bi-directional converters for storage, as well as the communications protocol with the second life batteries.
  • Integration in a real site of a microgrid optimization system.
  • Knowledge to develop a new, more efficient, economical and ergonomic energy storage container design.
  • Development of two 20kW bi-directional converters with SEAT battery communications.
  • Specification of communications with SEAT batteries.
  • Installation and commissioning of the converters in the SUNBATT LivingLab
  • Development of the monitoring and management system (SCADA) of the demonstrator.
  • Specification and implementation in the SCADA of the communication with the different elements of the LivingLab (batteries, converters, net meters, photovoltaic converter...).

Project partners

ENDESA, SEAT, CIRCE