Work Package 5: Longer Battery Life

(Updated: March 2020)

OBJECTIVES

Design thermal management and investigate load management strategies for homogeneous cell ageing within the battery pack in order to extend the lifetime of the battery.

PARTNERS: TUM(Lead), VITO, CEA, Voltia

APPROACH

  • Development of passive heat management, implementing phase change materials (PCM).
  • Development of active heat management implementing an innovative & efficient heat pump and coupling with passive heat management.
  • Development and implementation of optimal load management algorithms for balancing circuits and battery reconfiguration topologies.

WP5_2

RESULTS SO FAR

  • Module ageing experiments with temperature gradient in 6s1p configuration with dissipative balancing verified correlation of balancing effort and cell ageing.
  • Dissipative balancing after the charging period increased the accessible energy of the battery module.
  • Lithium plating is most likely responsible for ageing of colder cells in 6s1p module with temperature gradient.
  • Best solution for heat management is combining air and PCM cooling

Demonstrator for validation of passive/active cooling simulations.