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DC charging method, device and system

A technology of direct current charging and direct current energy, which is applied in the direction of circuit devices, battery circuit devices, collectors, etc., and can solve problems such as low flexibility and the inability of rectifier modules to realize flexible adjustment of DC voltage

Inactive Publication Date: 2018-10-19
STATE GRID BEIJING ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a DC charging method, device and system to at least solve the technical problem that the rectifier module cannot flexibly adjust the DC voltage and has low flexibility in the DC charging system in the related art

Method used

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  • DC charging method, device and system

Examples

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Embodiment 1

[0031] figure 1 Is a schematic diagram of a DC charging system according to an embodiment of the present invention, such as figure 1 As shown, the DC charging system includes: a rectifier 11, a DC output circuit 12, and an adjustable potentiometer 13, among which,

[0032] The rectifier 11 is used to convert the input AC power into DC power.

[0033] Among them, the rectifier includes: an input protection module for lightning protection and electromagnetic filtering of the input AC power; a bridge rectifier for converting the AC power after lightning protection and electromagnetic filtering into DC power.

[0034] Optionally, the input AC power can be three-phase AC power. Through the above-mentioned input protection module, the input three-phase AC power can be subjected to lightning protection treatment and electromagnetic filtering treatment, that is, EMI filtering treatment can be performed, and this part of the circuit can effectively absorb Lightning residual voltage or grid sp...

Embodiment 2

[0051] According to an embodiment of the present invention, an embodiment of a DC charging method is provided. It should be noted that the steps shown in the flowchart of the figure can be executed in a computer system such as a set of computer-executable instructions, and, although in The logical sequence is shown in the flowchart, but in some cases, the steps shown or described may be performed in a different order than here. Among them, the following DC charging method can be applied to the above DC charging system.

[0052] image 3 Is a flowchart of an optional DC charging method according to an embodiment of the present invention, such as image 3 As shown, the method includes the following steps:

[0053] Step S302: Receive the input AC power.

[0054] Step S304: Perform lightning protection processing and electromagnetic filtering processing on the input AC power.

[0055] Step S306: Convert the AC power that has undergone lightning protection processing and electromagnetic f...

Embodiment 3

[0059] Another embodiment is introduced below. In the DC charging device in the following embodiment, the operation of each module of the DC charging device may correspond to the steps in the above DC charging method.

[0060] Figure 4 Is a schematic diagram of an optional DC charging device according to an embodiment of the present invention, such as Figure 4 As shown, the DC charging device may include: a receiving unit 41, a processing unit 42, a conversion unit 43, and an adjustment unit 44, wherein,

[0061] The receiving unit 41 is used to receive the input AC power.

[0062] The processing unit 42 is configured to perform lightning protection processing and electromagnetic filtering processing on the input AC power.

[0063] The conversion unit 43 is used for converting the AC electric energy after lightning protection treatment and electromagnetic filtering treatment into DC electric energy.

[0064] The adjustment unit 44 is used to adjust the voltage of the DC power to obt...

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PUM

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Abstract

The invention discloses a DC charging method, device and system. The system includes a rectifier for converting input AC power into DC power; a DC output circuit connected to the rectifier and used for outputting the DC power; and an adjustable potentiometer for adjusting the voltage of the DC power to obtain DC power corresponding to the target DC voltage, wherein the DC power corresponding to the target DC voltage is used for providing working power for a preset device. The DC charging method, device and system solve the technical problem in the prior art that a rectifier module in a DC charging system cannot realize the flexible adjustment of the DC voltage and has low flexibility.

Description

Technical field [0001] The invention relates to the technical field of charging equipment, and in particular to a DC charging method, device and system. Background technique [0002] In related technologies, for high-frequency rectifier modules, the AC power input from the outside is generally converted into a fixed DC power, such as DC (direct current) 110V or DC48V. However, it cannot realize the flexible adjustment of the current, that is, the conversion The voltage load can only be the above-mentioned fixed DC voltage, that is, the flexible adjustment of multiple DC voltages cannot be realized in the related technology. In this way, when the substation or substation room fails, the adjustment of the DC voltage in the station cannot be realized. The output voltage is fixed (110V, 48V), resulting in low current emergency and unable to provide DC power at the target voltage. After comparison, it can be seen that the current DC power has a relatively high cost and can only be ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/04
CPCH02J7/04
Inventor 吴优
Owner STATE GRID BEIJING ELECTRIC POWER
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