EV Charge Connector Detection Circuit
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Solution Overview
Problem
Existing vehicular charge/discharge systems face challenges in accurately detecting the connection of the charge/discharge connector between an electric vehicle and a charging station, especially when communication is impossible, leading to inefficient power management and increased battery power consumption due to the need to wake up the vehicle controller from sleep mode.
Innovation Solution
A vehicular charge/discharge system that includes a detector applying a voltage to the connector's power line to determine connection status and a controller managing battery charge/discharge based on the state of charge, allowing for reliable connection detection without activating the vehicle controller, thereby reducing power consumption and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle controller is woken up from sleep mode to detect connector connection, then connection detection reliability is improved, but battery power consumption increases
Solution Approach 1:
The connection detection function is segmented from the vehicle controller and implemented as an independent detection circuit on the charging station side. This allows connection detection to occur without activating the vehicle controller, thereby maintaining detection reliability while minimizing power consumption.
Solution Approach 2:
An intermediary detection circuit is introduced on the charging station side to perform connection detection. This intermediary component enables the vehicle controller to remain in sleep mode while still achieving accurate connection status detection through the mediator's voltage measurement.
2Measurement precision
If communication operation is performed between vehicle controller and charging station, then connection detection accuracy is improved, but system complexity increases
Solution Approach 1:
The complex communication-based detection system is replaced with a simple voltage measurement mechanism. The detection circuit measures voltage on the power line to determine connector connection status, substituting mechanical/electrical communication protocols with a straightforward electrical measurement approach.
Solution Approach 2:
The detection circuit autonomously performs connection detection by measuring voltage on the power line without requiring activation of the vehicle controller or complex communication sequences. The system serves itself by using the existing power line infrastructure for detection purposes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and accurate detection of connector connection, reducing unnecessary battery power consumption and enhancing control over charging and discharging operations by using a connection detection circuit on the charging station side, allowing for continuous monitoring of connector status without relying on vehicle controller communication.
Implementation Method 1
a detector that applies a voltage to a terminal connected to the power line of the connector and detects whether the connector connects the battery and the charging station based on change of the applied voltage
Data Source
AI summary
In a charge/discharge system having a battery mounted in an electric vehicle, a charging station that charges the battery, and a connector that connects the battery of the electric vehicle and the charging station through a power line, there are provided a detector that applies a voltage to a terminal connected to the power line of the connector and detects whether the connector connects the battery and the charging station based on change of the applied voltage, and a controller that controls charge/discharge of the battery through the connector based on the state of charge of the battery memorized in a memory when it is detected that the connector connects the battery and the charging station.