Matrix EV Charging Power Matching via Voltage-Based Module Mapping
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Solution Overview
Problem
In matrix power distribution charging systems for electric vehicles, the correct matching of power distribution units and direct current modules is often disrupted during maintenance, leading to failed charging operations, requiring manual adjustments and affecting normal charging station functionality.
Innovation Solution
A power matching method that utilizes a charge control unit to order direct current modules to output specific voltages, samples these voltages using power distribution units, and logically computes switch device control orders to establish a correct correspondence between switch devices and direct current modules, enabling automatic matching without requiring special resources or precise wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual detection and adjustment of connection relationships is performed, then correct matching between power distribution units and direct current modules can be achieved, but charging efficiency is reduced and operation time is increased
Solution Approach 1:
The system performs automatic self-matching between power distribution units and direct current modules through voltage sampling and comparison. Each PDU autonomously samples voltages from DC modules, compares them to identify connections, and establishes correspondence relationships without requiring manual intervention, thereby maintaining high reliability while improving charging efficiency
Solution Approach 2:
The patent replaces manual mechanical detection and adjustment operations with an automated electronic system. The charge control unit uses voltage sampling circuits and logical computation to automatically detect connection relationships and generate control orders, substituting human operators with electronic control mechanisms to eliminate time-consuming manual adjustments
2Reliability
If manual adjustment of connection relationships is performed, then correct matching can be restored, but system complexity increases due to manual intervention requirements
Solution Approach 1:
The system autonomously performs the entire matching process through built-in voltage sampling circuits and control algorithms. Each power distribution unit independently samples voltages, compares them with expected values, and determines connection relationships without external manual guidance, thereby maintaining reliability while reducing operational complexity to simple automated execution
Solution Approach 2:
The system implements a feedback mechanism where voltage sampling results are continuously compared with expected voltage values. The charge control unit receives sampling data, performs logical computation to determine connection relationships, and adjusts control orders accordingly. This closed-loop feedback system ensures accurate matching while simplifying operations through automated error correction
3Device complexity
If fixed wiring connections are used between power distribution units and direct current modules, then system structure is simplified, but adaptability decreases when module positions change
Solution Approach 1:
The patent implements a dynamic matching system that automatically adapts to changing module positions. Instead of fixed wiring assignments, the system uses real-time voltage sampling and comparison to dynamically determine which DC module is connected to which PDU. This dynamic approach maintains simple fixed wiring while achieving full adaptability to position changes through automated detection
Solution Approach 2:
The system changes the parameter used for identification from fixed physical position to measurable voltage characteristics. By sampling voltage parameters from each DC module and comparing them against expected values, the system can identify connection relationships regardless of physical position changes. This parameter-based identification method maintains wiring simplicity while providing complete position flexibility
Data Source
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AI summary
According to a power matching method of a matrix power distribution charging system of the present invention, the matrix power distribution charging system includes at least two DC modules and a plurality of PDUs, wherein the DC modules and the PDUs are respectively connected to a CCU; wherein the power matching method includes steps of: sending orders to the DC modules by the CCU after the matrix power distribution charging system is turned on, so as to order the DC modules to output different constant voltage values; comparing the front end voltages of the switch devices with the constant voltage values outputted by the DC modules for determining a corresponding relation between the switch devices and the DC modules; finally, logically computing by the CCU according to an actual power requirement of the parking space and sending control orders to the PDUs for a certain DC module output combination, in such a manner that the PDUs correctly outputs a certain power. With existing system resources, each switch device of each of the PDUs automatically matches with each of the DC modules, without using additional dedicated resources to achieve matching operation.