Photovoltaic energy storage full direct current electric vehicle charging station

Abstract

The present invention provides a photovoltaic energy storage full direct current electric vehicle charging station. The full direct current means that the whole photovoltaic charging and energy storage discharging system has no an inverter, namely the inverter direct current-to-alternating current link and the charging pile alternating current-to-direct current link in the conventional design are cancelled. a solar energy and energy storage battery pack dual-channel complementation charging mode is employed to facilitate prolonging the life of energy storage battery and utilizing the retired electric vehicle battery pack for energy storage. The charging station comprises an energy storage battery pack, the anode end of the energy storage battery pack is connected with the anode end of a discharging module and the cathode of a diode, the anode of the diode is connected with the anode of a solar panel, the cathode of the solar panel and the cathode of the energy storage battery pack are connected with the input cathode of the discharging module, and the discharging module has an output end configured to charge the electric vehicle battery pack.

Description

technical field [0001] The present invention relates to electric vehicle charging station technology, in particular to a photovoltaic energy storage full DC electric vehicle charging station. The two-way complementary charging mode of solar energy and energy storage battery packs is conducive to prolonging the life of energy storage batteries and utilizing decommissioned electric vehicle battery packs for energy storage. Background technique [0002] The difficulty of charging electric vehicles has become an important bottleneck in the promotion of new energy vehicles, and the existing charging piles are difficult to support the existing quantity and future development of new energy vehicles. In particular, electric vehicles currently have a short cruising range (100-150 kilometers), and there is no fixed charging station for long-distance driving and cannot be charged. At present, there are more than 80 domestic companies developing electric vehicle charging piles. As of ...

AI Technical Summary

Problems solved by technology

For this method, the inventor believes that there are the following defects: 1) The photovoltaic energy storage power station has a high-power inverter (DC / AC), which has low conversion efficiency, increased costs, large self-consumption, and poor reliability.

2) The power of the electric vehicle charging pile is limited by the power of the inverter of the energy storage power station, even if the capacity of the energy storage battery pack is large, it is impossible to output high power

3) 100% of all power output comes from the energy storage battery pack, which requires frequent charging and discharging of the energy storage battery pack every day, increasing the number of charge and discharge times to reduce the life of the energy storage battery

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