Battery Management System

Battery management systems (BMS) are at the heart of today’s electric vehicles (EVs). They must operate safely and reliably to deliver the performance customers expect from EVs. However, BMS in EVs face critical challenges that design engineers must address to reduce signal disruptions, overheating, component degradation, and even thermal runaway and battery fires. For example: 

• Traditional wiring harnesses consume valuable space, limiting room for battery cells and constraining design flexibility. 
• Electromagnetic interference (EMI) from high-power electronics can disrupt sensitive components, causing signal interference and power supply instability.
• Tightly packed components generate significant heat and must withstand constant vibration and thermal cycling. 
• Without proper protection, moisture, and contaminants can penetrate electronics, leading to degradation and potential failure.

Qnity provides comprehensive choices designed to address these interconnected challenges. Advanced thermal interface materials efficiently dissipate heat. Flexible laminated circuit materials replace bulky wiring harnesses, enabling compact, lightweight designs that maximize space efficiency. EMI shielding solutions – including board-level shields, absorber materials, and conductive gaskets – enhance protection for sensitive circuits from interference. Sealing gaskets enhance protection for sensitive components from moisture and dust intrusion. Thermally conductive insulators combine electrical insulation with heat transfer, reducing the risk for shorts while managing thermal loads.

Together, these materials enhance BMS reliability, safety, and performance in next-generation EVs.

As EVs move toward higher voltages, faster charging, greater energy density, lighter weight, and more compact, space-efficient designs, these challenges will intensify. Automotive design engineers need advanced material solutions to enable reliable, safe, and efficient BMS performance.