公开(公告)号：US11545836B2

公开(公告)日：2023-01-03

申请号：US17535284

申请日：2021-11-24

Applicant: Delta Electronics, Inc.

Inventor： Changyong Wang ,  Yangyang She ,  Li Chen

IPC: H02J3/38 ,  G01R19/25 ,  H02J3/32 ,  H02M3/158

Abstract: A photovoltaic energy storage system includes an energy storage device, an inverter, a photovoltaic array device, a DC/DC conversion device and a controller. When an output voltage of the photovoltaic array device is greater than or equal to a predetermined threshold value, the photovoltaic energy storage system is operated in a first working mode. When the output voltage of the photovoltaic array device is lower than the predetermined threshold value, the photovoltaic energy storage system is operated in a second working mode. The DC/DC conversion device includes a bypass switch and a DC/DC converter. When the photovoltaic energy storage system is operated in the second working mode, the bypass switch is turned on and the DC/DC converter is disabled. Consequently, the electric power of the energy storage device is transmitted to the inverter through the bypass switch.

公开(公告)号：US20220294226A1

公开(公告)日：2022-09-15

申请号：US17535284

申请日：2021-11-24

Applicant: Delta Electronics, Inc.

Inventor： Changyong Wang ,  Yangyang She ,  Li Chen

IPC: H02J3/38 ,  H02M3/158 ,  H02J3/32

Abstract: A photovoltaic energy storage system includes an energy storage device, an inverter, a photovoltaic array device, a DC/DC conversion device and a controller. When an output voltage of the photovoltaic array device is greater than or equal to a predetermined threshold value, the photovoltaic energy storage system is operated in a first working mode. When the output voltage of the photovoltaic array device is lower than the predetermined threshold value, the photovoltaic energy storage system is operated in a second working mode. The DC/DC conversion device includes a bypass switch and a DC/DC converter. When the photovoltaic energy storage system is operated in the second working mode, the bypass switch is turned on and the DC/DC converter is disabled. Consequently, the electric power of the energy storage device is transmitted to the inverter through the bypass switch.