EV Charging CP Reset via PLC Line Switching
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Solution Overview
Problem
Users of electric vehicle charging systems must manually unplug and replug the charging station connector to resume charging or perform additional charging, which is inconvenient, especially in cases of communication interruptions or errors.
Innovation Solution
An electric vehicle charging system that includes a switch on the communication line between the charging station and the vehicle, allowing the charging controller to simulate the unplugging and replugging of the connector by changing the peak voltage of the control pilot signal, enabling automatic CP reset processing without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the user manually unplugs and replugs the charging station connector to resume charging or perform additional charging, then the charging can be resumed or restarted, but the operation becomes inconvenient and time-consuming
Solution Approach 1:
The charging system performs automatic CP reset processing without user intervention. The charging controller automatically controls the switch to transition the CP signal voltage between 12V and 9V, simulating the unplug-replug action and enabling charging resumption autonomously
Solution Approach 2:
The patent replaces the mechanical action of physically unplugging and replugging the connector with an electrical control mechanism. The charging controller uses a switch to manipulate the CP signal voltage levels, achieving the same functional effect as mechanical connector manipulation but without physical movement
2Reliability
If the charging station connector is manually unplugged and replugged for CP reset processing, then the charging control signal can be reset, but the user experience deteriorates due to repeated manual operations
Solution Approach 1:
The charging system autonomously performs CP reset processing by controlling the switch to transition the CP signal between 12V and 9V. This self-service mechanism eliminates the need for users to manually unplug and replug the connector, maintaining reliable charging control while simplifying user interaction
Solution Approach 2:
The charging controller acts as an intermediary between the charging station and the user. It automatically manages the CP signal voltage transitions and switch operations, mediating the complex electrical reset process and presenting a simplified interface to the user through the instruction device
3Extent of automation
If automatic CP reset processing is implemented by controlling a switch on the communication line, then charging can be resumed without manual intervention, but the device complexity increases
Solution Approach 1:
The charging controller performs multiple functions: it manages normal charging operations, handles communication with the instruction device, and executes automatic CP reset processing by controlling the switch. This multi-functionality consolidates the automation logic into a single existing component, achieving high automation without proportionally increasing overall system complexity
Solution Approach 2:
The switch on the communication line acts as an intermediary element that the charging controller can manipulate to achieve CP reset. This simple intermediate component enables complex automation functionality while adding minimal structural complexity to the system
Data Source
AI summary
An electric vehicle charging system that performs charging by sending/receiving a PLC signal including a CP signal between an electric vehicle with a storage battery and a charging station charging the storage battery, includes an instruction device with which a user instructs the electric vehicle to resume charging. The charging station includes an electronic control unit sending/receiving the PLC signal via a communication line. The electric vehicle includes a charger, a switch on the communication line, and a charging controller. Upon receipt of an instruction to resume charging, the charging controller allows a peak voltage of the CP signal to transition from a second voltage to a first voltage by controlling the switch to disconnect the communication line, and then allows the peak voltage of the CP signal to transition from the first voltage to the second voltage for CP reset processing, thereby resuming charging the storage battery.