Wireless Charging Circuit Protection with Dual Threshold Control
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Solution Overview
Problem
Wireless charging of electric vehicles and bicycles poses safety risks due to the potential for over-large voltage or current damaging the battery, as existing technologies lack effective fault detection and protection mechanisms.
Innovation Solution
A circuit protection method and apparatus that automatically samples voltage or current values, controls input and output switches based on pre-set threshold ranges, and notifies the sending end to prevent illegal voltage or current from being inputted or outputted to the battery, ensuring safe charging by rectifying, dividing, and converting the energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless charging is implemented without protection mechanisms, then charging convenience is improved, but battery safety deteriorates due to potential over-large voltage or current damage
Solution Approach 1:
The patent applies preliminary action by detecting voltage and current values before they reach the battery, and preemptively controlling switches to block abnormal energy flow. The sampling unit continuously monitors charging parameters in advance, and the control unit prepares protection responses before damage can occur, thus maintaining both charging convenience and battery safety.
Solution Approach 2:
The patent implements feedback through a closed-loop monitoring system where the sampling unit continuously detects voltage and current values, compares them against preset thresholds, and feeds this information back to the control unit. The control unit then adjusts the state of control switches based on this feedback, creating a dynamic protection mechanism that maintains battery safety without interfering with normal charging operations.
2Reliability
If voltage and current monitoring and control switches are added, then battery safety is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a protection apparatus that can handle both voltage and current protection functions through a unified control architecture. The sampling unit monitors both parameters, and the control unit manages multiple control switches (first control switch for voltage, second control switch for current) through a single control logic, reducing overall system complexity while maintaining comprehensive protection.
Solution Approach 2:
The patent uses parameter changes by setting different preset threshold values for voltage and current based on battery requirements. The control unit dynamically adjusts the state of control switches based on whether detected parameters exceed these thresholds, providing adaptive protection without requiring complex real-time calculation or adjustment mechanisms.
3Measurement precision
If real-time sampling and dual threshold detection are implemented, then detection precision is improved, but energy consumption increases
Solution Approach 1:
The patent applies partial action by implementing continuous sampling only when needed during the charging process, rather than constant high-precision monitoring at all times. The sampling unit operates periodically to detect voltage and current values, and the control unit activates protection measures only when threshold violations are detected, thus achieving adequate detection precision while minimizing unnecessary energy consumption.
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
The solution effectively reduces the probability of battery damage and enhances charging safety by detecting and preventing over-large voltage or current values from being inputted or outputted, ensuring the battery receives only legal values for charging.
Implementation Method 1
the coil at the receiving end induces the electromagnetic signal generated by the sending end so as to generate a current and a voltage
Data Source
AI summary
The present disclosure discloses a circuit protection method. The method includes that: a voltage or a current sent by a sending end of a circuit protection apparatus is received, and a voltage value of the received voltage or a current value of the received current is sampled; when it is detected that the sampled voltage value or current value is in a first pre-set threshold range, a pre-set input control switch is controlled to be turned on, and an input of a voltage or a current of the sending end is received; the received voltage or the received current is converted and processed, and a voltage value of the processed received voltage or a current value of the processed received current is sampled; and when it is detected that the processed voltage value or the processed current value is in a second pre-set threshold range, a pre-set output control switch is controlled to be turned on, and the processed received voltage or the processed received current is allowed to be outputted. The present disclosure also discloses a circuit protection apparatus, a charging device and a computer storage medium.