Electric motor assembly and vehicle
By adopting a separate design for the front and rear oil circuits of the cooler and multiple cooling oil circuits in the electric powertrain, the problem of increased energy consumption caused by the need for cooling oil to pass through a heat exchanger in the prior art has been solved, achieving efficient cooling of the motor and reducer and reducing vehicle energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BYD CO LTD
- Filing Date
- 2023-02-28
- Publication Date
- 2026-06-09
AI Technical Summary
In existing electric powertrains, cooling oil needs to pass through a heat exchanger to cool the motor and reducer separately, which increases the cooling load on the heat exchanger and leads to increased vehicle energy consumption.
Design an electric powertrain with separate oil circuits before and after the cooler. The oil circuit after the cooler is used for motor cooling, while the oil circuit before the cooler is used for reducer cooling. The oil circuit before the cooler does not pass through the cooler. By combining multiple cooling oil circuits and bearing cooling oil circuits, efficient cooling of the motor and reducer can be achieved.
While meeting the cooling requirements of the motor and reducer, the cooling load on the cooler is reduced, thus reducing vehicle energy consumption.
Smart Images
Figure CN118399672B_ABST