Cell and Battery Design - Batteries | Hardware

Lithium-ion batteries are becoming increasingly popular, and it is impossible to imagine today’s world without them. Every lithium battery needs a battery management system for monitoring and control. Care is required in large systems such as electric cars and home storage systems, as failures and damage can have catastrophic consequences. The battery management system measures all critical parameters of a battery at fixed intervals. These are voltage, current and temperature. As soon as one of these parameters leaves its valid value range, the battery management system must intervene and disconnect the battery from the system in an emergency. Accurate state of charge determination is also essential at the same time. The state of charge of a battery cannot be measured directly at the battery but must be calculated. There are various methods for this. The best known are Coulomb Counting and the Kalman Filter. Each of these methods has its advantages and disadvantages and it must be decided for each system individually which method is used. Stability, reliability, and real-time capability are of particular interest in electromobility. Research is far from finished here and better measurement methods are being developed all the time. More sophisticated battery models supported by artificial intelligence are becoming more widespread and more important as the battery market grows stronger and faster.