High-capacity energy-storage DC (direct current) quick charging station

Abstract

The invention discloses a high-capacity energy-storage DC (direct current) quick charging station. The high-capacity energy-storage DC quick charging station comprises a power distribution cabinet anda charging cabinet, wherein a controller, a rectification module, a DC contactor, a circuit breaker and an energy-storage battery pack are integrated in the power distribution cabinet; a touch screen, a card reader, an electric energy measuring meter and a charging gun are inlaid in the surface of the charging cabinet; the controller is electrically connected with the rectification module, the DCcontactor, the electric energy measuring meter, the touch screen and the card reader; the input end of the rectification module is connected with mains supply, and the mains supply is transmitted tothe DC contactor, the circuit breaker and the charging gun in sequence after being subjected to rectification treatment; or after being subjected to rectification treatment, the mains supply is transmitted to the energy-storage battery pack for electric energy conversion and storage. According to the high-capacity energy-storage DC quick charging station, an electric automobile can be charged continuously under the condition that the mains supply disappears, furthermore, a charging process is quick, and power grid pressure can be relieved.

Description

technical field [0001] The invention relates to the technical field of electric vehicle charging, and more specifically relates to a large-capacity energy storage DC fast charging station. Background technique [0002] At present, cherishing the limited oil resources on the earth, protecting the natural environment on which human beings depend, reducing greenhouse gas emissions, and curbing the trend of global warming have become common topics faced by countries all over the world. Electric vehicles have obvious advantages in terms of environmental protection, cleanliness, and energy saving. According to relevant statistics, the energy utilization rate of electric vehicles is 7.5 percentage points higher than that of fuel vehicles, and the pollutant discharge is only 2% to 8% of ordinary internal combustion locomotives. , basically no pollutant discharge. Electric vehicles have the advantages of low pollutant emissions, low noise, high energy efficiency, low maintenance and...

AI Technical Summary

Problems solved by technology

However, the existing charging piles cannot achieve fast charging, and it is difficult to upgrade

The power of the existing charging piles is relatively small, and the general output power is within 60kw. However, after the rapid emergence of urban bus electric vehicles, in order to improve the cruising range of the vehicles, the battery packs on the vehicles can store up to 150-180kwh. If you still use low-power charging Pile charging, charging time up to 3-4 hours

If you want to replace a high-power charging pile, you need to replace the station’s incoming line transformer at the same time, and the transformation cost is high

At the same time, based on the capacity limitation of the existing urban power grid and the limitation of power supply lines, it is impossible to achieve capacity increase, and it is difficult to implement

In addition, the existing charging piles are generally used during the day and are connected to the urban power grid. There may be a peak period of electricity consumption during the day, and at night as the number of charging vehicles decreases, the electricity load also decreases. Rational use of peaks and valleys of the power grid, the charging period has a greater impact on the power grid

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