Passive Cell Simulation for ECU Tests without Real Cells

During acceleration, the batteries of electric vehicles must provide particularly high performance. In order to keep the necessary currents and line cross-sections small, up to 200 individual cells are connected in series. During operation, the permissible voltage range of all battery cells must always be adhered to in every operating state to exclude danger, which can range from damage to fire and even explosion.

Passive cell simulations are used to avoid being permanently dependent on real batteries or very complex and expensive active cell simulations during the development of Cell Supervision Electronics (CSE). These simulate the complete cell stack in a balanced state of charge, the individual cell controllers detect suitably charged cells and thus a fully functional battery system.

Passive cell simulations thus make it possible to test and protect all functions of CSE control units which are not directly battery relevant without having to implement real cells or active cell simulations.

Typical areas of application are:

• Software development for electric and hybrid vehicles
• OBD tests
• Labs, test benches and engineering workshops

at OEMs, system and module suppliers (Tier1) as well as in test companies.