Energy-saving direct current charging pile and charging method

Abstract

The invention discloses an energy-saving direct current charging method comprising the following steps that (1), a direct current charging pile is configured with an alternating current contactor; (2), the alternating current contactor is disconnected before starting charging, and the standby power loss of a charger module is reduced; (3), the alternating current contactor is closed when chargingis started, the charger module is put into use according to current demand, the operating efficiency of the charger module is improved, and the electric quantity is saved; (4), the alternating currentcontactor is disconnected after the charging is finished, and the standby power loss of the charger module is reduced; and (5), a power draught fan is controlled to start and stop according to the temperature in a charging pile cabinet, and the power draught fan running power waste is avoided. The energy-saving direct current charging method can reduce standby and running loss of the direct current charging pile in the industry before charging, during charging and after charging, and the operation efficiency is improved.

Description

technical field [0001] The invention relates to the field of electric vehicle charging, in particular to an energy-saving charging pile and a 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 ...

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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