Charging Connector Voltage Detection for Safe Disconnection Control
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Solution Overview
Problem
Existing charging devices struggle to detect a change from a connected state to a non-connected state in real-time, leading to potential safety issues and inefficient charging processes.
Innovation Solution
A charging device equipped with a detection unit that monitors the inter-terminal voltage between device-side connection terminals and determines a change in state by comparing this voltage to a predetermined value, allowing for immediate shutdown of the current supplying route.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a charging device uses conventional connection detection methods, then the charging process can be initiated, but the device cannot detect when connectors are disconnected, leading to continued voltage application and safety issues
Solution Approach 1:
The patent introduces a detection circuit as an intermediary component that includes a detection terminal connected to the connection terminals. This detection circuit monitors the electrical state between connection terminals to determine whether they are connected or disconnected, enabling safe detection without requiring direct contact between charging connectors
Solution Approach 2:
The patent replaces mechanical detection methods (physical contact between connectors) with electrical field-based detection. By measuring electrical parameters such as voltage or current in the detection circuit, the system can determine connection status without mechanical interaction, enabling non-contact detection and improving safety
2Reliability
If the charging device continuously monitors connection status, then safety is improved, but the device complexity increases due to additional detection components
Solution Approach 1:
The detection circuit serves multiple functions: it detects connection status, determines disconnection state, and provides signals for control actions. By making the detection circuit multi-functional, the patent reduces the need for separate components for each function, thereby simplifying the overall system while maintaining real-time detection capability
Solution Approach 2:
The patent combines the detection function with the existing charging control system. The detection circuit is integrated into the charging device's control architecture, merging detection, monitoring, and control functions into a unified system. This integration reduces component count and simplifies the overall device structure while enabling continuous monitoring
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 real-time detection of state changes, ensuring safe and efficient charging by preventing continued voltage application when the connectors are disconnected.
Implementation Method 1
The detection unit is configured to detect an inter-terminal voltage between the first device-side connection terminal and the second device-side connection terminal
Data Source
AI summary
A charging device basically includes a first power source, first and second device-side connection terminals, a first resistance, a detection unit and a device-side controller. The first resistance is connected between the first power source and the first device-side connection terminal. The detection unit detects an inter-terminal voltage between the first device-side connection terminal and the second device-side connection terminal. A vehicle-side controller is connected between a first vehicle-side connection terminal connected to the first device-side connection terminal and a second vehicle-side connection terminal connected to the second device-side connection terminal. The device-side controller determines that the charging-device-side charging connector and the vehicle-side charging connector are turned into a non-connected state from a connected state by a fact that the inter-terminal voltage detected by the detection unit becomes greater than a predetermined voltage.