ProjectMonolithically Integrated Energy Storage Modules

Competence Areas at RISE ICT
Monolithically Integrated Energy Storage Modules

Lower cost of electrochemical energy storage is crucial for an increased use of energy harvesting and renewable but intermittent energy sources. Today, a large share of the cost of energy storage in batteries and supercapacitors originates in the integration of the electrochemical storage cells with circuits needed to balance the charge levels in the cells.

Electrochemical storage cells, battery cells or supercapacitor cells, are often in series to deliver the voltage needed in many devices. When electrochemical storage cells are connected in series and charged and discharged a number of times, the cells can reach different charge levels. This can lead to overcharge of highly charged cells, or failure of the module to deliver current if one cell is discharged, and also to reversed polarity charging of cells. Balancing circuits are therefore connected to the individual cells for the purpose of keeping the charge level of all serially connected cells at a similar level.

Today, this is done by connecting discrete components, the individual storage cells to components of the balancing circuit. This integration of discrete components makes energy storage modules expensive to manufacture and vulnerable to contact problems. The discrete energy storage modules today resembles discrete electronic circuits of the 1960’s when the development of monolithically integrated circuits (IC’s) began. Since then, the integration of electronics has revolutionized the industry as well as the society as a whole.

The MODULIT project aims at demonstrating monolithically integrated energy storage modules, by which here is meant that materials for serially connected storage cells are manufactured on the same substrate as leads and the circuits for balancing the charge levels. MODULIT also aims at demonstrating scalability of the components.

The project partners have skills needed to achieve the project goals, in printed electronics, simulation of printed components, graphene electrode manufacturing, cellulose chemistry, manufacturing of materials, printing substrates and sealing materials.

The MODULIT project is financed by The Swedish Energy Agency, has a budget of 16 MKR for 4 years.

Project Partners

Acreo Swedish ICT AB, coordinating, Linköping University, Mid Sweden University, Innventia AB, Royal Institute of Technology, SICS East Swedish ICT AB