Work Package 1: Improved Simulation & Modelling Tools

(Updated: December 2018)

OBJECTIVES

Development of new models and tools supporting advanced BMS research of WP2-WP7.

PARTNERS: Siemens (lead), TUM, RWTH, TUE, Voltia

APPROACH

  • Research, development and delivery of virtual test benches enabling BMS coupling for testing (from MiL to HiL) and preliminary calibration in WPs 2..5
  • Research of new battery model reduction techniques and the provision of reduced models to be integrated in the aforementioned simulation and validation tools and in new BMS control strategies.

RESULTS SO FAR

  • Battery cells for EVERLASTING project have been chosen and tested. Experimental results from RWTH (Particle radius, Porosities, Thicknesses) and TUM (OCPs, Entropy Profiles, Balancing Analysis) are now available.
  • Electrochemical models have been developed by TUM and TUE. Several reduction methods have been studied and presented in different articles.
  • A protocol for a generic characterization profile of current has been developed by Siemens to speed up process of equivalent circuit battery model from test measurement or from electrochemical model.
  • Basic parameters of eVan (VOLTIA’s electric utility van intended for Demonstrator deployment) were collected and delivered to partners in order to create the virtual test bench by Siemens (from MiL to HiL). Demo with functional BMS connection has also been tested.
  • EVERLASTING partners have created a model overview to easily share information between models created during the Project.

Manufacturing process of using the vacuum assisted wetting process of the NMC811 coin blanks.

PLANNED ACTIVITIES

  • Test campaigns have been finalized, electrochemical model is being refined based on last updates, especially regarding aging effect.
  • Model reduction methodologies will be applied on the updated electrochemical model at first. Then a protocol to generate equivalent circuit battery models (cell, module & pack level) based on the electrochemical model will be used to generate a fast and robust battery model with aging that will be implemented in the virtual test bench.
  • The equivalent battery model will be connected to the BMS developed in WP6. In the virtual test bench to be shared and checked by CEA. The eVan model will be used as reference.