Energy-saving DC charging method

Abstract

An energy-saving DC charging method, comprising the following steps: (1) configuring an AC contactor in the main circuit of a DC charging pile; (2) disconnecting the AC contactor before starting charging to reduce the standby loss of the charging module; (3) closing the AC contactor when starting charging. The contactor and the charging module are put into use according to the current demand, which improves the operating efficiency of the charging module and saves power; (4) the AC contactor is disconnected after charging to reduce the standby loss of the charging module; (5) the power fan is controlled by the temperature inside the charging pile cabinet Start and stop to avoid waste of power when the power fan is running. The invention can reduce the standby and operation loss of DC charging piles in the industry before, during and after charging, and improve operating efficiency.

Description

technical field [0001] The invention relates to the field of electric vehicle charging, in particular to an energy-saving charging method. Background technique [0002] As the core component of the DC charging pile, the charging module has a standby loss of not less than 1‰. For example, a 120kW charging pile has a standby loss of 2.88kW*h a day, and a charging station has 100 charging piles, and its loss is as high as 288kW*h. For operators is a huge loss. The characteristic of the charging module is that when it runs at the rated current, it has the highest efficiency, the highest power factor, and the smallest harmonics. At present, when charging electric vehicles, it is difficult for the charging pile to satisfy the charging module running at the rated current, which will inevitably cause a certain amount of waste of electric energy. The fan is another power device of the charging pile. Its main function is to dissipate heat. Generally, the power of the fan is large and...

AI Technical Summary

Problems solved by technology

[0002] As the core component of the DC charging pile, the charging module has a standby loss of not less than 1‰. For example, a 120kW charging pile has a standby loss of 2.88kW*h a day, and a charging station has 100 charging piles, and its loss is as high as 288kW*h. For operators is a huge loss

The characteristic of the charging module is that when it runs at the rated current, its efficiency is the highest, the power factor is the highest, and the harmonics are the smallest. At present, when the charging pile is charging the electric vehicle, it is difficult to satisfy the charging module running at the rated current, which will inevitably cause a certain amount of waste of electric energy.

The fan is another power device of the charging pile. Its main function is to dissipate heat. Generally, the power of the fan is large and there is a certain operating loss. At present, the fan is started when the charging pile is charging in the industry, but when the charging load is small, the charging pile The internal temperature is not high, there is no need to start the fan

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