Energy storage charging power supply device for connecting electric automobile with intelligent power grid

Abstract

The invention discloses an energy storage charging power supply device for connecting an electric automobile with an intelligent power grid. The energy storage charging power supply device comprises a power grid end filter circuit, a static switch, an active power factor correction circuit, an inversion circuit, a bus super capacitor, a bidirectional direct-current/direct-current (DC/DC) converter and a battery end filter circuit, wherein the static switch is connected with three-phase alternating current of the power grid through the power grid end filter circuit; the input end of the active power factor correction circuit is connected with the static switch, and the output end of the active power factor correction circuit is connected with the bus super capacitor; the bus super capacitor is connected with the static switch through the inversion circuit, and then is connected with the battery end filter circuit through the bidirectional DC/DC converter; the battery end filter circuit is connected with a power battery; and the static switch, the active power factor correction circuit and the inversion circuit control the transmission direction of energy between the power grid and the power battery. According to the energy storage charging power supply device, large-capacity batteries can be charged quickly; furthermore, the energy storage charging power supply device has high charging efficiency and a rational design, and is convenient to use.

Description

technical field [0001] The invention is an energy storage charging power supply device connecting an electric vehicle and a smart grid, and belongs to the innovative technology of the energy storage charging power supply device connecting an electric vehicle and a smart grid. Background technique [0002] At present, constant current charging and constant voltage charging are usually used for charging power batteries; during constant current charging, because the ability of the battery to accept current decreases with the charging process, the current in the later stage of charging is mainly used for electrolysis of water, and gas is formed and cannot be effectively charged. The ground is converted into chemical energy, and the charging efficiency decreases; when charging at a constant voltage, due to the uncertain battery voltage, the charging current is too large, and problems such as battery pole bending are prone to occur, which will affect the battery life. In practical...

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Problems solved by technology

[0005] In the prior art, there are some methods for fast charging the power battery with positive and negative pulses, and there are also some high-efficiency charging power sources. For example, Chinese patents 200710020300, 200710022012.4, 201010202827.2, etc. all mention the technology of fast charging the battery solution, Chinese patents 200710000451.5 and 200510091141.x mentioned technical solutions for improving power factor and efficiency, but no energy storage and charging power supply device solution combining high power factor high-efficiency rectification, fast charging and inverter technology has been found yet

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