Shared Multipoint EV Charging System with Dynamic Channel Allocation
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Solution Overview
Problem
Current multi-channel electric vehicle charging systems face inefficiencies due to sequential activation of charging channels, leading to suspension or interruption of charging, error modes, and lack of scalability, as each channel requires a fixed number of control cards and involves lengthy connection and disconnection processes.
Innovation Solution
A shared multi-point charging system utilizing a single-channel control module with a load switching module, power relays, charge pause emulation circuits, and a scheduling module to manage power distribution and channel allocation dynamically, allowing for real-time adaptation based on vehicle connections and charging needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sequential activation of charging channels is used to reduce control card quantity, then device complexity is reduced, but charging reliability deteriorates due to suspension or interruption risks
Solution Approach 1:
The system segments the charging station into multiple independent charging channels, each with its own control card that can operate autonomously. This allows parallel operation of multiple channels while maintaining individual channel reliability, resolving the contradiction between using fewer control cards and ensuring charging continuity.
Solution Approach 2:
The system dynamically changes operational parameters by detecting vehicle presence and automatically activating or deactivating specific charging channels. This adaptive parameter adjustment ensures optimal charging continuity by maintaining active channels based on real-time vehicle connections, while keeping the overall control structure simplified.
2Productivity
If charging lane activation time is increased to improve charging efficiency, then productivity is improved, but loss of time increases due to wake-up phase delays
Solution Approach 1:
The system performs preliminary actions by maintaining charging channels in a ready state with control cards continuously monitoring for vehicle connections. This eliminates the need for lengthy wake-up phases when vehicles connect, as the control cards are already prepared to immediately activate charging, thus improving productivity without time loss.
Solution Approach 2:
The system uses feedback mechanisms where control cards continuously monitor vehicle connection status and automatically adjust channel activation. This real-time feedback ensures that charging channels are activated only when needed, optimizing charging efficiency while minimizing idle time and avoiding unnecessary wake-up delays.
3Device complexity
If multi-channel control card is used to reduce control card quantity, then device complexity is reduced, but adaptability deteriorates due to fixed channel number
Solution Approach 1:
Each control card is designed with universal functionality to operate independently as a complete charging control unit. This multi-functionality allows the system to scale adaptively by adding or removing individual control cards based on demand, rather than being constrained by a fixed multi-channel card architecture, thus improving both simplicity and adaptability.
Solution Approach 2:
The system implements dynamic configurability where the number of active charging channels can be adjusted in real-time based on vehicle connections and power availability. This dynamic approach replaces the static fixed-channel architecture, allowing the system to adapt to varying demands while maintaining a simplified control structure through independent channel operation.
4Reliability
If connection checking process is extended to ensure safety, then reliability is improved, but loss of time increases due to several tens of seconds duration
Solution Approach 1:
The control cards perform preliminary safety checks and vehicle recognition continuously before charging activation. This preliminary action ensures that when a vehicle connects, the safety verification is already complete or can be rapidly confirmed, reducing the perceived connection checking time while maintaining reliability through pre-established safety protocols.
Data Source
Figure 1~2
Figure 3A
Figure 3B
AI summary
The present invention relates to a shared multipoint charging system for electric vehicles, said system comprising a charging station (210) powered by an AC power supply (200), and comprising a mode 3 charge control module (220) connected to a charge switching module (260) by a common control channel (CP). The charge switching module has a plurality of charge channels (240), each charge channel being intended to charge an electric vehicle battery. The charge switching module includes a plurality of switches and an equal plurality of charge pause emulation circuits, each associated with a charge control channel, the switches being controlled by a scheduling module.Each load control channel is connected either to the common control channel or to its associated load pause emulation circuit, with only one load control channel out of the plurality of load control channels (240) being able to be connected to the common control channel during a load interval.