Lithium-ion batteries are incredibly powerful and densely packed with energy. However, releasing that energy without control can lead to dangerous situations, such as fires or even loss of life. Conversely, when managed correctly, these batteries power our e-bikes and electric cars efficiently and safely. The key to this controlled release of energy lies in the Battery Management System (BMS).

A Battery Management System is crucial for maintaining the safety, efficiency, and longevity of lithium-ion batteries. I've been building electric cars since 2018, and in this post, I’ll provide a high-level overview of what BMS does and why it’s so important. The BMS monitors five important parameters, does important calculations, it also carries out battery balancing and has other tasks such as opening and closing contactors, or monitoring isolation resistance.