Thermo-mechanical stress investigations on newly developed passive balancing board for battery management systems

Electrification of the powertrain is a key challenge to reduce greenhouse gas emission, primary energy consumption and traffic noise. However, the user acceptance of electric vehicle is confronted to different challenges such as costs of the vehicle, driving range, or infrastructure support. Several of these challenges are directly related to the battery, the central element of fully electric vehicles. The aim of the INCOBAT project is to provide an innovative and cost efficient battery management systems for next generation HV-batteries. This will be realized by improving the BMS by means of new electronic components, new control strategies and new development methods in order to achieve reduction in costs and complexity as well as an increase in flexibility and performance (e.g. driving range). The consideration of non-functional aspects like reliability and robustness are an essential part of the project for paving the way to industrialization. In this paper, a newly developed satellite board, representing an essential part of the INCOBAT BMS, is presented and important results with respect to the thermo-mechanical behaviour of the system under realistic loading conditions are discussed.