Auf Leistungsumwandlungssystem Basierendes Ladeverfahren und Vorrichtung sowie Leistungsumwandlungssystem

Details

Veröffentlichungs-Nr.

EP4773458

Anmeldetag

12. März 2024

Veröffentlichung

6. März 2025

Rechtsraum

EP

IPC

H02J7/00, H02J3/32

Abstract

A power conversion system-based charging method and apparatus, and a power conversion system. A soft-start circuit (301) connected in parallel with a first branch (302) can be used to perform voltage compensation on a bus by means of a direct current side. A voltage of the first branch (302) of a positive electrode of a battery is acquired as a first voltage, a voltage of a second branch (303) of the positive electrode of the battery is acquired as a second voltage, a difference between said voltages is calculated, the value of the first voltage is compared with the value of the second voltage when the difference is greater than a preset voltage value, the bus undergoes voltage compensation by using the direct current side so that the voltage of the bus is equal to the smaller voltage value, and then the bus is charged on the basis of the larger voltage value. A power conversion system is compatible with a multi-branch system and is used for a multi-branch topology, and a voltage compensation method of the power conversion system is not limited by the incapability to perform voltage compensation due to a low voltage of the branch where the soft-start circuit (301), thereby reducing the cost and improving the efficiency without affecting the system function, and greatly improving the utilization rate.

Anmelder

Firma

Sungrow Power Supply Co., Ltd.

Land

🇨🇳 China

Fachgebiete