Electric vehicle on-board charger and cooling method thereof

Abstract

The invention relates to an electric-vehicle-mounted charger. The electric-vehicle-mounted charger is fixed into a spare tire pond. The portion between the spare tire pond and the electric-vehicle-mounted charger is filled with supporting parts, gaps are reserved between the supporting parts and the spare tire pond, and cooling loops where air can flow are formed by the gaps between the supporting parts and the spare tire pond. The electric-vehicle-mounted charger is arranged in a closed space of the spare tire pond of a vehicle, an air inlet passage connected with the exterior and an air outlet passage connected with the exterior are avoided, the space occupied by an external air passage is avoided, and meanwhile the development cost is effectively reduced. A cooling fan is integrated in the electric-vehicle-mounted charger, and the space additionally occupied by installing the fan in the external air passage is avoided; internal air cyclically flows along the metal plate wall of the spare tire pond, the aim that overall metal plates of the spare tire pond exchange heat with the exterior to achieve cooling is achieved, and the electric-vehicle-mounted charger is cooled under the sealed condition; and an air passage outlet, opened outwards, of an automobile body is not needed, the development cost is reduced, and water leakage risks caused by hole forming are avoided.

Description

technical field [0001] The invention belongs to the field of electric vehicles, in particular to a cooling arrangement method for an electric vehicle on-board charger. Background technique [0002] As an important part of electric vehicles, on-board chargers are key to layout and cooling. On the premise of meeting the layout and performance requirements of new energy components, how to low cost, high reliability, and small space occupation is the primary problem to be solved. [0003] The current main cooling methods for on-board chargers are natural cooling, forced air cooling and liquid cooling. [0004] The natural cooling solution dissipates heat through natural convection of the air. The structure is simple, but the temperature of the device is high, which has a great impact on the peripheral parts. The car space is generally compact and contrary. [0005] The advantage of the liquid cooling solution is that it requires less layout space and has less impact on periphe...

AI Technical Summary

Problems solved by technology

[0012] 1. The heat dissipation solution for the on-board charger requires an air inlet and an outlet, which takes up additional layout space and increases development costs;

[0013] 2. The fan of the on-board charger is arranged in the air duct, resulting in a larger volume of the air duct, occupying additional layout space, and increasing development costs;

[0014] 3. The on-board charger cooling solution requires the on-board charger to be connected to the outside of the car body through the air duct. Using the original car ventilation holes has the risk of affecting the closing force of the vehicle. If the air duct connection hole is specially opened for this purpose, there is a risk of vehicle water leakage.

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