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
2025-02-26
Patent
Electronic Resource
English
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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