Charging Device Protection Test via Voltage Signal Injection
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Solution Overview
Problem
Current charging devices lack a method to test whether they enter a protection state due to abnormal voltage drops, affecting their safety and stability.
Innovation Solution
A test system and method that includes a charging device with a switch tube and a control module, where a power supply module outputs a voltage signal to the switch tube to simulate an abnormal voltage drop, and the control module determines if the device enters a protection state, thereby testing the protection function against abnormal voltage drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no testing method is provided for abnormal voltage drop, then the charging device operates normally, but the safety and stability cannot be ensured
Solution Approach 1:
The patent introduces a power supply module as an intermediary testing device that couples to the control electrode of the switch tube. This module outputs voltage signals to simulate abnormal voltage drops, enabling indirect testing of the protection function without requiring actual fault conditions. The intermediary device bridges the gap between normal operation and safety verification.
Solution Approach 2:
The testing system performs preliminary action by proactively applying voltage signals to the control electrode before actual abnormal conditions occur. The power supply module pre-establishes testing conditions by outputting controlled voltage signals that simulate future fault scenarios, allowing the protection function to be verified in advance under controlled conditions.
2Reliability
If the protection function is not tested, then the device structure remains simple, but potential failures cannot be prevented
Solution Approach 1:
The patent implements feedback by having the control module detect whether the charging device enters a protection state when voltage between the switch tube ends exceeds a preset threshold. The system continuously monitors the voltage difference and provides feedback to determine if protection activation is appropriate, enabling verification of the protection function's responsiveness and accuracy.
Solution Approach 2:
The patent replaces complex physical fault injection methods with electrical signal substitution. Instead of mechanically creating actual voltage drop conditions, the system uses the power supply module to output electrical voltage signals to the control electrode, substituting mechanical/physical fault creation with controlled electrical signaling that achieves the same testing objective more easily.
Data Source
AI summary
The present disclosure provides a test system and a test method for a charging device. The test system for the charging device includes a charging device and a power supply module. The charging device has a switch tube and a control module. The power supply module is coupled to a control electrode of the switch tube and is configured to output a voltage signal to the control electrode of the switch tube, so that a voltage between a first end and a second end of the switch tube is greater than a preset voltage protection value. The control module is configured to determine whether the charging device enters a protection state when the voltage between the first end and the second end of the switch tube is greater than the preset voltage protection value, thereby testing a protection function against abnormal voltage drop of the charging device.