Mission and Focus Areas of Battery Storage Systems

Mission

The mission of the “Battery Storage Systems” research programme is to conduct leading edge research and education at international level on various aspects of batteries.

Our core activities at battery cell level are related to battery electrical, thermal and lifetime characterization, battery modeling (performance and lifetime) and battery diagnostic based on results obtained in our state-of-the-art laboratory facilities for testing battery cells and systems.

On battery system level, the research is related to the construction, testing, and diagnostics of battery packs. Furthermore, based on the aforementioned activities, it is also our mission to support other research programmes at the Department of Energy Technology (e.g., Photovoltaic Systems, E-mobility and Industrial Drives) in developing innovative smart energy management strategies for batteries working on different applications such as electric vehicles, hybrid renewable energy systems etc.

Focus Areas

In this research programme, we focus on activities at both battery cell and battery system level.

Cell level

  • Electrical characterization of battery cells – measurement and mapping of battery performance parameters (e.g., capacity, internal resistance, small signal AC impedance) at different conditions (i.e., temperatures, C-rates, SOC and SOH levels)

Electrical characterization of battery cells

  • Performance modeling of battery cells – estimation of battery static and dynamic behavior over a wide range of operating conditionsPerformance modeling of battery cells

  • Calendar ageing tests – assessing the influence of different stress factors (e.g., SOC and temperature ) on the degradation behavior of battery cells during storage (idling);

Calendar ageing tests

  • Cycle ageing tests - assessing the influence of different stress factors (e.g., C-rate, cycle depth, average SOC, and temperature ) on the degradation behavior of battery cells during cycling;

Cycle ageing tests

  • Lifetime modeling of battery cells – determining the degradation behavior and the expected lifetime of batteries under complex mission profiles, which are characteristic to different applications such as electric vehicles, grid support, renewables’ grid integration etc.
Lifetime modeling of battery cells
  • Power, Energy and Thermal Management Strategies – development and assessment of different batteries operation strategies with focus on battery behavior and successful application fulfilment

development and assessment of different batteries operation strategies

  • Thermal characterization and modelling of battery cells based on calorimeter and/or using Thermal Impedance Spectroscopy (TIS) experiments

Thermal characterization and modelling of battery cells

  • Diagnostics of battery cells - development of methods for SoC and State-of-Health (SoH) estimation of battery cells

Diagnostics of battery cells

  • Development of new battery chemistries and improvement of existing ones – collaboration with research groups working at the material level (Department of Chemistry and Bioscience - Section for Chemistry)

System level

  • Construction of battery packs and smart battery packs with increased functionalities

construction of smart battery packs

  • Testing and evaluation of Battery-Management-Systems (BMS)

Testing and evaluation of BMS

  • Thermal modeling and management of battery packs

CFD modelling of battery pack

Collaboration Partners

  • Lithium Blance A/S
  • Danish Technological Institute
  • Fraunhofer IVI
  • Blue Ocean Robotics
  • KK Wind Solutions
  • Beyonder
  • IK4 – Ikerlan
  • Tampere University of Technology