This application provides a charging apparatus and a charging pile. The charging apparatus includes a direct current bus, an AC/DC conversion circuit, a DC/DC conversion circuit, and a pre-charging circuit. The AC/DC conversion circuit and the DC/DC conversion circuit are connected through the direct current bus, and the pre-charging circuit is configured to charge the direct current bus before the AC/DC conversion circuit is turned on. The pre-charging circuit includes a primary-side circuit and a secondary-side circuit, the secondary-side circuit includes a current sampling resistor, and the current sampling resistor is configured to sample a current of the secondary-side circuit. The current sampling resistor in the secondary-side circuit is used to detect a current of the secondary-side circuit in the pre-charging circuit. After a short circuit or overload occurs, a duty cycle of a switching transistor in the pre-charging circuit may be controlled based on a sampled current of the secondary-side circuit, to avoid a problem that the switching transistor fails due to over-temperature caused by an excessively large current flowing through the switching transistor.
CHARGING APPARATUS AND CHARGING PILE
LADEVORRICHTUNG UND LADESÄULE
APPAREIL DE CHARGE ET PILE DE CHARGE
26.02.2025
Patent
Elektronische Ressource
Englisch
IPC: | H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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