Multi-Terminal Fast Charging Circuit for Protocol-Compatible Power Paths
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Solution Overview
Problem
Existing multi-terminal charging devices face issues of low wireless charging efficiency, excessive heat generation, and reduced charging rates due to the deception of power supply and voltage, which limits the integrity of fast charging protocols and compatibility with various terminal devices.
Innovation Solution
A fast charging device with multiple intelligent terminals is designed, incorporating an input power management circuit, boost-buck management circuits, and charging modules that support both wired and wireless charging, allowing selective connection to fast or non-fast charging protocols, and utilizing a buck or boost circuit to stabilize voltages for efficient charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If deception power supply and deception voltage are used to ensure terminal safety, then charging safety is improved, but fast charging mode cannot be entered and charging rate decreases
Solution Approach 1:
The power supply path is segmented into multiple independent paths: a first power supply path for fast charging terminals that preserves fast charging protocols, and a second power supply path for non-fast charging terminals that uses deception power supply at 5V. This segmentation allows simultaneous support for both fast charging and safe charging of different terminal types without mutual interference.
Solution Approach 2:
The system performs preliminary identification of terminal types through protocol detection before power supply. The controller identifies whether a terminal supports fast charging protocols (QC/PD) or only standard 5V charging, and pre-configures the appropriate power supply path accordingly, preventing the need to use deception power supply for fast charging terminals.
2Adaptability or versatility
If voltage is stabilized at default 5V to ensure compatibility, then charging safety is improved, but fast charging protocol integrity is destroyed and charging efficiency decreases
Solution Approach 1:
The voltage output is segmented into two distinct voltage levels through separate power supply paths: high voltage output (9V/12V/20V) for fast charging terminals and low voltage output (5V) for standard terminals. The controller dynamically selects the appropriate voltage level based on terminal identification, maintaining both compatibility and efficiency.
Solution Approach 2:
The system changes the output voltage parameter dynamically based on terminal requirements. For fast charging terminals, the voltage is increased to 9V, 12V, or 20V to enable fast charging mode. For standard terminals, the voltage remains at 5V to ensure compatibility. This parameter change is controlled through protocol identification and path selection.
3Ease of operation
If multiple terminals are charged simultaneously through one charger, then convenience is improved, but wireless charging efficiency is low and heat generation is excessive
Solution Approach 1:
The charging system is segmented into wireless charging modules for watch and headphone terminals, and wired charging modules for mobile phone terminals. This segmentation allows wired fast charging to be used for devices that support it (mobile phones), avoiding the energy losses and heat generation associated with wireless charging, while maintaining the convenience of simultaneous multi-terminal charging.
Solution Approach 2:
The controller acts as an intermediary that intelligently assigns charging modes to different terminals based on their capabilities. It mediates between the power supply and multiple terminals, directing appropriate charging methods (wired or wireless) to each terminal to optimize overall system efficiency while maintaining user convenience.
4Reliability
If PD protocol is kept complete for terminal safety, then protocol integrity is improved, but watch and headphone cannot obtain power when mobile phone is not connected
Solution Approach 1:
The power delivery system is segmented into protocol-based power paths and direct power paths. Terminals supporting PD protocol undergo complete protocol handshaking to maintain integrity, while terminals that do not support PD protocol (watch, headphone) receive power through a direct power supply path that bypasses protocol requirements, ensuring they can obtain power independently of mobile phone connection status.
Solution Approach 2:
The protocol identification and power supply functions are extracted and separated. The protocol identification circuit handles PD protocol verification for terminals that require it, while the power supply circuit provides independent power delivery to terminals that do not require protocol verification. This extraction allows simultaneous support for both protocol-integrity requirements and universal power availability.
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
This solution enhances charging compatibility and efficiency by stabilizing voltages and ensuring safe charging, allowing for faster and more stable charging of multiple terminals while maintaining the integrity of fast charging protocols, thus improving adaptability and charging rates.
Implementation Method 1
incorporating an input power management circuit, boost-buck management circuits, and charging modules that support both wired and wireless charging, allowing selective connection to fast or non-fast charging protocols, and utilizing a buck or boost circuit to stabilize voltages for efficient charging
Data Source
AI summary
The invention discloses a fast charging device with multiple intelligent terminals and belongs to the field of charging technologies. The fast charging device includes an input power management circuit, a deception circuit, multiple boost-buck management circuits, and multiple charging modules; the input power management circuits are externally connected with a charging head and connected with the deception circuit; the deception circuit is connected with the boost-buck management circuits connected with a corresponding charging module; the charging module is externally connected with a terminal to be charged, includes a wired charging module and a wireless charging module, and further includes a fast charging protocol module and a non-fast charging protocol module; and the terminal to be charged is selectively connected with the fast charging protocol module or the non-fast charging protocol module for charging as required. The invention realizes the technical effect of improving charging compatibility and efficiency.