Quick Charger Conversion Device Automatic Voltage Negotiation
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Solution Overview
Problem
Current quick chargers are not compatible with devices lacking QC2.0/3.0 technology, and existing chargers require manual gear switching, leading to inconvenient operation and potential key damage, with limited ability to output higher charging voltages.
Innovation Solution
A conversion device with an input end, voltage regulator module, recognition module, and control module that automatically adjusts output voltage through handshake and recognition signals, allowing for multi-gear quick charging without manual intervention, and includes a resistance bridge circuit and LDO voltage regulator for stable power and overcurrent protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual gear switching is used to output multi-gear quick charging voltage, then the charger can provide different charging voltages, but the operation becomes inconvenient and the key is likely to be damaged easily
Solution Approach 1:
The patent replaces the mechanical key-based gear switching system with an automatic control system that uses voltage detection and signal processing to identify charging devices and automatically output appropriate charging voltages. The control module detects the impedance characteristics of connected devices and automatically selects the suitable charging gear without requiring manual key operations, thereby eliminating mechanical wear while maintaining multi-gear charging capability.
Solution Approach 2:
The charger performs self-identification of the connected device type through automatic voltage detection and impedance measurement. The control module autonomously determines the appropriate charging voltage level by analyzing the electrical characteristics of the connected device, enabling the system to serve itself without user intervention for gear selection.
2Adaptability or versatility
If current quick chargers are designed with fixed voltage output, then the device structure is simple, but compatibility with devices lacking QC2.0/3.0 technology is poor
Solution Approach 1:
The patent designs the quick charger with multi-functional capability to support both QC2.0/3.0 protocol devices and non-QC devices. The control module detects the device type through voltage negotiation and impedance measurement, then automatically adjusts the output voltage accordingly. This universal design allows a single charger to serve multiple device types without requiring separate charging devices for different protocols.
Solution Approach 2:
The charger dynamically changes its output voltage parameter based on the detected device type. For QC-compatible devices, it negotiates and outputs elevated voltages (9V, 12V, 20V), while for non-QC devices, it automatically maintains the standard 5V output. This parameter adaptation is achieved through automatic detection of device characteristics and corresponding adjustment of charging parameters by the control module.
3Productivity
If high voltage quick charging is implemented, then charging speed is improved, but voltage fluctuations may cause exceptions and damage
Solution Approach 1:
The patent implements a feedback control mechanism where the control module continuously monitors the output voltage and current during charging operations. Based on real-time detection of voltage fluctuations and device response, the system automatically adjusts the output parameters to maintain stable charging. The feedback loop ensures that voltage remains within safe ranges while delivering high-speed charging, preventing exceptions and potential damage from voltage instability.
Solution Approach 2:
The charger incorporates protective measures in advance to prevent voltage-related damage. Before delivering high voltage, the system performs detection and negotiation to ensure the device can withstand the upcoming voltage level. The control module prepares appropriate protection mechanisms and voltage regulation settings beforehand, cushioning against potential voltage spikes or fluctuations that could cause exceptions or damage to the connected device.
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 output of multi-gear charging voltages up to 20V, enhancing compatibility and universality, allowing charging of devices like notebook computers, and preventing damage from voltage fluctuations.
Implementation Method 1
the voltage regulator module receives a power voltage through the input end to stabilize a voltage, and outputs the power voltage after voltage stabilization
Implementation Method 2
the LDO voltage regulator circuit stabilizes the voltage output by the power supply anode to provide a stable power voltage for the recognition module and the control module
Data Source
AI summary
Disclosed a conversion device for a quick charger, comprising an input end, a voltage regulator module, a recognition module, a control module and an output end, wherein, the voltage regulator module receives a power voltage through the input end to stabilize a voltage, and outputs the power voltage after voltage stabilization to the recognition module and the control module; the control module reads a conversion voltage of the output end, and produces a conversion signal group according to the conversion voltage to output to the recognition module; and the recognition module produces a handshake signal and a voltage recognition signal according to the conversion signal, and outputs through the input end. Through the device and method, equipment that are not quickly charged may also be charged by the quick charger, so that an application scope of the quick charger is expanded.