Power Module Switching Control for Stable EV Charging Output
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Solution Overview
Problem
The concave fluctuation phenomenon between the output power of a direct-current busbar and the required power of a vehicle during charging, caused by simultaneous switching of multiple power modules, affects the stability and security of charging piles.
Innovation Solution
A switching method for power modules that involves determining a switching mode based on required and output power, establishing or disconnecting connections between power modules and a direct-current busbar to meet preset conditions, and controlling output power to stabilize the total output power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple groups of power modules switch the same direct-current busbar simultaneously, then the charging power requirements can be met, but a large concave fluctuation phenomenon arises between the output power of the direct-current busbar and the required power of the vehicle
Solution Approach 1:
The control method performs preliminary power compensation before and during the switching process. When a power module is about to switch, the system pre-adjusts the output power of other modules to compensate for the expected power fluctuation, ensuring smooth transition without concave fluctuations.
Solution Approach 2:
The system continuously monitors the output power of the direct-current busbar and the required power of the vehicle, using feedback control to dynamically adjust the output power of each power module. This real-time feedback mechanism detects power fluctuations and automatically compensates to maintain stable charging.
2Adaptability or versatility
If multiple groups of power modules are used to output power to meet different charging power requirements, then the adaptability to different charging needs is improved, but the complexity of power module switching control increases
Solution Approach 1:
The control system automatically determines the number of power modules needed based on the charging power requirements and autonomously manages the switching and power distribution. The system serves itself by making real-time decisions without external intervention, simplifying the overall control complexity while maintaining high adaptability.
Data Source
AI summary
The present disclosure provides a switching method for power modules, a control apparatus and a charging pile. The switching method includes: acquiring required power for a vehicle when being charged and the output power of a first power module; determining a switching mode according to the required power and the output power of the first power module; and completing switching according to the switching mode. By means of the method, a concave fluctuation phenomenon can be reduced during the switching of power modules, thereby improving the charging stability and security.