US20260190305
2026-07-02
Electricity
H05K7/20927
The patent application discusses an innovative on-board charger designed for electric vehicles, incorporating a three-dimensional liquid cooling loop to enhance heat dissipation. The charger features a housing with a cover plate and an accommodation groove, which houses the electrical components. The cooling loop comprises two liquid cooling plates, a housing liquid inlet flow channel, and a housing liquid outlet flow channel. These components are arranged to improve the efficiency of the heat dissipation process, crucial for maintaining the operational efficiency of the on-board charger and the vehicle's powertrain.
The invention pertains to electric vehicle technology, specifically focusing on enhancing the performance of on-board chargers. The powertrain, a critical component of electric vehicles, relies on efficient charging and discharging of the power battery. However, traditional on-board chargers face significant heat dissipation challenges, which this design aims to address by integrating an advanced cooling system.
The cooling system includes a first and second liquid cooling plate that are stacked vertically, with the electrical component positioned between them. This configuration allows for a three-dimensional cooling effect, improving heat dissipation from different angles. The cooling plates are connected through various communication holes and a split flow channel, facilitating a continuous flow of cooling liquid. This setup ensures that the cooling liquid is consistently refreshed, enhancing the cooling efficiency.
The cooling plates are designed with separation protrusions and communication holes to create distinct flow channels. These channels enable a series-parallel hybrid connection, which optimizes the cooling process by balancing flow rate and thermal resistance. The first liquid cooling plate includes a split flow channel that divides and directs the cooling liquid efficiently, allowing it to flow through both parallel and series paths, thereby maximizing the cooling effect.
The series-parallel hybrid connection design leverages the strengths of both series and parallel cooling paths, improving overall cooling efficiency. The series path has a high flow rate and low thermal resistance, whereas the parallel path minimizes flow resistance. This configuration prevents excessive temperature increases and ensures effective heat management within the on-board charger. By integrating the split flow channel into the first liquid cooling plate, the invention simplifies the cooling loop structure while maintaining robust performance.