Abstract:

With the increasing power levels and integration of electric vehicles， the thermal load of power modules is rising rapidly， which puts higher demand on the thermal management technology of power modules. The topology optimization design of power module liquid cooled plates is becoming a key technology for achieving high heat flux density heat dissipation due to its high heat transfer and low-pressure drop loss characteristics. In this paper， based on the density topology method， a topology optimization design model is constructed for the flow channel structure of the power module liquid cooling plate. Through the coupling of multiple physical fields of flow and heat transfer； multi-objective topology optimization design for the flow channel of the liquid cooling plate is carried out. The results show that the topology-optimized liquid cooling plate design presents a multi-level biomimetic flow channel structure， which significantly reduces pressure drop loss and improves heat dissipation capacity. Compared to the traditional finned liquid cooling plate structure of the benchmark， the pressure drop loss of the flow channel structure after topology optimization is reduced by 72.8% ， with a maximum temperature reduction of 33.28 K， which provides a new design idea for high-performance liquid cooling plates of automotive electronic control power modules.

Key words: power module, cold-plate, multi-objective, topology optimization