In the assembly of hybrid electric vehicle propulsion systems, the plate heat exchanger plays a critical role in managing thermal energy transfer between the battery pack and the cooling circuit. Positioned within the thermal management unit, this component ensures efficient heat dissipation from high-density battery modules, maintaining optimal operating temperatures during charge and discharge cycles. By facilitating precise thermal regulation, the heat exchanger supports the reliability and longevity of powertrain components, particularly in environments where thermal fluctuations are frequent. Its integration into the vehicle’s cooling loop enables consistent performance under varying load conditions, contributing to the overall efficiency of the powertrain. In motor vehicle manufacturing, this part is essential for ensuring that thermal systems meet stringent performance standards, supporting the production of next-generation electric and hybrid vehicles. The plate heat exchanger’s compact design and high efficiency make it ideal for space-constrained applications within vehicle chassis, where thermal management is both complex and critical.