bidirectional charging portable power station

Common portable power station use a converter to step-up its low-voltage DC (12V or 48V, etc.) of the internal battery to 220V AC. But since the converter is unidirectional, it cannot step-down 220V AC to low-voltage DC. Therefore, it has to use an external Adapter (standalone charger) to charge power back from the electricity grid. The portable power station is equipped with a DC input interface. For charging, you have to connect the adapter to the DC input interface and the wall socket respectively. Because the DC input power is usually low, the charging speed is slow. If you have a big portable power station, you may have to take 10 hours to charge it full.

To solve this problem, we developed a new type of portable power stations by equipping a bi-directional converter. The bi-directional converter can not only change low-voltage DC to 220V AC but also change 220V AC to low-voltage DC. That means the bidirectional technology can provide both converting and charging. Therefore, no external charger is needed for charging the portable power station. You can just plugin a cable for dirrect charging from wall socket. The charging speed is very fast due to the 220V AC high voltage of grid.

This technology make power station more portable because you can charge it very fast then move. For example, during the road trip and camping, you can just go to a coffee shop for short break and charging the portable power station. When you finish the coffee, the portable power station has been fully charged, hence you can continue the trip without worry about power on the go.

Being the developer, we have a patent technology. The patent relates to power supply technology, in particular to a portable energy storage power supply, including battery pack BT1, H4 bridge inverter circuit, transformer T, resonant groove circuit, first high voltage full bridge circuit, charging circuit. The battery string BT1 is connected in parallel to the H4 bridge inverter circuit. H4 bridge inverter circuit is connected with the low-voltage side of transformer T. One end of the resonant groove road is connected to the high voltage side connection of transformer T. The other end of the resonant channel is connected to one end of the first high-voltage full-bridge circuit. The other end of the first high-voltage full-bridge circuit is connected to the charging circuit. The charging circuit can be used to connect with the load or the grid to realize the bidirectional charging and discharging of the power supply, and the elimination of adapters, reducing the cost and volume of the power supply.

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