Schematic diagram of energy storage bidirectional converter

What is a bi-directional DC-DC converter?

Bi-directional DC-DC converters are indispensable in providing power from storage batteries to the power system, and vice versa, providing power from the power system to the storage battery.

What is a bi-directional converter?

Bi-directional converters use the same power stage to transfer power in either direction in a power system. This helps reduce peak demand tariff, reduces load transients, and enables quick changes in the direction of power transfer. They have high efficiency, up to 97% at power levels up to 22KW.

Can a 'isolated bidirectional DC-DC power supply' be used for high-power conversion?

This article introduces a reference design for an "isolated bidirectional DC-DC power supply" that can be used as the basis for high-power conversion applications, including EV charging stations and inverters in solar power generators.

What are the benefits of using bi-directional converters?

Bi-directional converters reduce peak demand tariff, reduce load transients, and provide V2G capabilities with quick power transfer direction changes. They also offer high efficiency (>97%) at power levels up to 22KW. These converters use the same power stage to transfer power in either direction in a power system.

How does a DC-coupled energy storage system work?

Figure 1 shows a block diagram of a classical DC-coupled energy storage system, in which the bidirectional DC/DC is responsible for charging and discharging the battery. For safety, low-voltage battery pack systems (40V to 60V) require bidirectional isolation DC/DC due to the high bus voltage (360V to 550V).

What is a bidirectional power directing switch?

Bidirectional Power Directing Switches The purpose of the two switches is to channel the flow of power from the panel or to the load depending on the state of the system. When the system is in the battery charging state, MOSFET Q3A is turned on and MOSFET Q3B is turned off. Power flow occurs from the panel to the battery.