Control method for preventing charging pile starting current impact

Abstract

The invention relates to a control method for preventing a charging pile starting current impact, and the method comprises the steps that the charging pile builds a demand list for each charging gun,obtains the demand current values of an electric vehicle for many times after the charging guns are electrically connected with the electric vehicle, and writes the demand current values into the demand list of the charging guns according to the sequence; when the charging pile determines that the current required current value of the electric vehicle is greater than the previous required currentvalue, the charging pile determines that the charging demand of the electric vehicle is in a rising trend; when the current required current value is smaller than (equal to) the previous required current value, the charging pile determines that the charging demand of the electric vehicle is in a descending (stable state) trend; and when the charging pile determines that the charging demand trend of the electric vehicle is continuously in the same state for multiple times, the charging pile adjusts the output current value of the electric vehicleso that the output current of the charging pile is matched with the actual demand of the electric vehicle, the current overcharge condition is avoided, and the impact influence of the starting current of the charging pile on the vehicle battery is prevented.

Description

technical field [0001] The invention relates to the field of charging piles, in particular to a control method for preventing charging pile starting current impact. Background technique [0002] With the improvement of people's living standards, the penetration rate of private cars is getting higher and higher. As a late star, electric vehicles driven by electric energy have many advantages such as environmental protection, quietness, fast acceleration and cost saving. The rapid development of the electric vehicle industry not only reduces the consumption of non-renewable energy, but also changes the way we travel. At the same time, a new problem is that the cruising range of traditional cars is more than 500km, and the process of filling up the fuel takes about 5 minutes. However, electric vehicles need to achieve a cruising range of more than 400km, and a full charge process needs to reach more than 2 hours, which is a serious waste of time and cost. In order to solve t...

AI Technical Summary

Problems solved by technology

[0003] During the fast charging process of the electric vehicle, the large output current of the charging pile meets the charging demand of the electric vehicle, but it also buryes a safety hazard for the battery system of the vehicle, especially during the charging start-up stage or the charging demand of the electric vehicle. standout moment

Because in the actual output process of the charging pile, the response speed of the output current adjustment of the charging module is not the same, which can easily cause the output current to overcharge.

For example, when the demand current of the vehicle battery increases, the output change response of the charging pile will be delayed, resulting in an impact on the output current of the charging pile that belongs to the characteristics of the device. Although this impact is short-term, it will also bring There are some potential hidden dangers, such as damage to the vehicle battery, or even cause charging to stop, etc.

Of course, in the actual charging process, the actual output current of the charging pile will be higher than the demand current of the vehicle battery management system, which will easily cause different degrees of damage to the battery and reduce the service life of the vehicle battery, which is even more serious. Overcharging the vehicle will cause the vehicle battery to malfunction, causing the vehicle battery to catch fire naturally, not only causing property damage, but even endangering personal safety

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