EV Charging Connector Release Using Auxiliary Battery Backup
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Solution Overview
Problem
Existing charging systems fail to automatically disconnect the vehicle's inlet and connector when power is lost during the charging process, leading to a stuck connection and inability to release the vehicle from the charging device.
Innovation Solution
A charging system that includes a relay to electrically connect and disconnect the vehicle's auxiliary battery with the charging device, allowing power to be supplied from the auxiliary battery to the charging device and automatically remove the connector from the inlet in case of a power failure, ensuring the connection can be released.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is supplied to the charging device during charging, then the charging device can maintain control and communication functions, but in case of power failure the connector cannot be automatically removed from the inlet
Solution Approach 1:
The system performs preliminary action by storing energy in the auxiliary battery before power failure occurs. The auxiliary battery is charged during normal operation so that when power failure happens, the stored energy can immediately power the connector removal mechanism without waiting for external power restoration.
Solution Approach 2:
The auxiliary battery acts as an intermediary energy source between the main power supply and the connector removal mechanism. When the main power supply fails, the auxiliary battery mediates by providing the necessary power to operate the removal mechanism, ensuring continuous functionality.
2Stability of the object's composition
If the connector remains connected during power failure, then the charging system maintains connection stability, but the vehicle cannot be disconnected from the charging device
Solution Approach 1:
The system prepares in advance by maintaining the auxiliary battery in a charged state during normal operation. This preliminary energy storage enables the system to quickly respond to power failures and automatically remove the connector, preventing prolonged stuck connections and maintaining charging operation efficiency.
Solution Approach 2:
The charging system performs self-service by using its own auxiliary battery to power the connector removal mechanism when external power fails. The system serves itself by internally generating the necessary power from the auxiliary battery without requiring external intervention or manual disconnection.
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 automatic disconnection of the vehicle from the charging device even when system power is lost, allowing safe and efficient charging operations by using the auxiliary battery to power the disconnection mechanism.
Implementation Method 1
a relay that electrically connects and disconnects an auxiliary battery of the vehicle and the charging device
Implementation Method 2
power is supplied from the auxiliary battery to the charging device
Data Source
AI summary
A charging system that charges a traveling battery of a vehicle by supplying power to the traveling battery from a charging device that inserts and removes a connector into and from an inlet of the vehicle, includes: a relay that electrically connects and disconnects an auxiliary battery of the vehicle and the charging device in a state in which the inlet and the connector are connected. Further, in a case where a power to be supplied to the charging device is lost, the charging system operates in a manner that the relay is turned on so that the auxiliary battery and the charging device are electrically connected, power is supplied from the auxiliary battery to the charging device, and the charging device automatically removes the connector from the inlet.