Protective Design of DC Charger Based on Forced Air Cooling

Presently, the heat dissipation design of DC charger of electric vehicle mainly adopts forced air cooling, which has poor sand and dust-proof performance. This paper provides a kind of air inlet filter scheme with curved structure. The ventilation and protection performances of four kinds of filter screens were tested by high temperature heat dissipation test and dust-proof test, which is of great significance to the protective design of chargers with forced air-cooled heat dissipation. Nylon filter screen and non-woven fabric filter screen have the best heat dissipation effect. The sand proof effect of non-woven fabric filter screen is better than nylon filter screen. The scheme of combining the structure of curved air inlet and non-woven fabric filter screen is the optimal scheme which has important application significance and popularization value.