Intelligent charging pile system

Abstract

The invention discloses an intelligent charging pile system. According to the intelligent charging pile system, a charging characteristic curve for the battery of an electric vehicle is issued to a charging terminal through the system; the charging terminal corrects the charging characteristic curve according to variables such as the number of the times of charging and discharging and temperature of the battery and charges the battery of the electric vehicle; and therefore, the charging efficiency of the electric vehicle and the safety of the battery can be improved, and the service life of the battery can be prolonged. With the intelligent charging pile system adopted, the problem of large harmonic content of the network side of the charging pile of the electric vehicle at present can be solved; and fundamental wave reactive current, negative-sequence current, zero-sequence current and harmonic current in load current can be filtered out, so that only a fundamental wave positive-sequence active component is left, and therefore, the influences of zero-sequence leakage error can be avoided, and the efficiency and security of charging can be greatly improved.

Description

Technical field [0001] The invention relates to an intelligent charging pile system. Background technique [0002] With the deepening of the global energy crisis, the depletion of oil resources and the increasing harm of air pollution and global temperature rise, energy saving and emission reduction are the main directions of future automotive technology development. Japan's Toyota Corporation took the lead in developing the Prius hybrid car, which opened the prelude to the era of electric vehicles. As a new generation of transportation, electric vehicles have incomparable advantages over traditional vehicles in terms of energy saving, emission reduction and reducing human dependence on traditional fossil energy. Since 2009, the Chinese government has intensively introduced policies and measures to encourage the development of electric vehicles and related industries, and enterprises have significantly increased their investment in electric vehicle research and development ...

AI Technical Summary

Problems solved by technology

Among them, the harm caused by harmonic pollution to the power grid mainly includes the following aspects: the voltage and heat caused by harmonic current will shorten the service life of power factor compensation capacitors; due to mechanical vibration, it will be affected by the fundamental frequency magnetic field and harmonic current Influence, when the mechanical resonance frequency is equal to the electrical excitation frequency, resonance will occur to generate greater mechanical stress and damage the equipment; harmonics will cause the system to misjudge the point where the voltage crosses zero and the voltage is zero; harmonic currents will cause The increase of transformer iron loss and copper loss; interference to electronic equipment and relay protection; harmonic current will cause equipment malfunction, which may interrupt production and operation

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