Embedded USB Charging Sockets With Split Power Conversion
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Solution Overview
Problem
Embedded USB charging sockets are limited by their low-power output, making them unsuitable for charging electronic products with high power requirements, such as notebook computers and monitors, which necessitate a separate charger connected to an AC socket.
Innovation Solution
A power supply system comprising a distribution box with a power delivery charging apparatus and multiple charging sockets that convert AC mains to DC power, allowing each socket to transmit load power information for adaptive power delivery, supporting high-power output and fast charging through Type-C transmission cables, with the AC/DC module in the distribution box and DC/DC module at the socket minimizing electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the embedded USB charging socket uses a compact power converter to meet volume specifications, then the device size is reduced and ease of operation is improved, but the power output is limited to low-power DC (5 volts) which reduces the power delivery capability
Solution Approach 1:
The patent divides the power conversion function into two separate modules: an AC/DC module located in the distribution box that converts AC mains to DC power, and a DC/DC module located at the charging socket that converts DC power to the required output voltage. This segmentation allows the socket end to be compact while the high-power conversion occurs at the distribution box, resolving the contradiction between compact size and high power output capability.
2Power
If the AC/DC module is integrated into the charging socket to provide high-power output, then the power delivery capability is improved, but the electromagnetic interference increases and affects sensitive environments
Solution Approach 1:
The patent extracts the AC/DC module from the charging socket and relocates it to the distribution box. This extraction removes the high electromagnetic interference source from the socket location, allowing the charging socket to operate in electromagnetic-sensitive environments while still providing high-power output capability through the separated DC/DC conversion at the socket end.
3Power
If a separate charger is used for high-power electronic products to meet power requirements, then the power delivery capability is improved, but the device complexity and loss of time increase
Solution Approach 1:
The patent makes the charging socket universal by enabling it to handle both low-power devices (through the compact DC/DC module) and high-power devices (through the AC/DC module at the distribution box). This multi-functionality eliminates the need for separate chargers for different power requirements, reducing system complexity and user inconvenience while maintaining high power delivery capability when needed.
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 the widespread use of embedded USB charging sockets for various electronic products by providing high-power output, supporting both low and high power requirements, and effectively managing electromagnetic interference in sensitive environments like medical institutions.
Implementation Method 1
The AC/DC module receives an AC mains, converts the AC mains into the DC power
Implementation Method 2
The DC/DC conversion circuit receives the DC power and to be supplied power, and converts the DC power into an output power according to the control signal
Data Source
AI summary
A power supply system includes a distribution box and a plurality of charging sockets. The distribution box includes a power delivery charging apparatus. The charging sockets are electrically connected to the power delivery charging apparatus. The charging socket transmits a load power information to the power delivery charging apparatus, and the power delivery charging apparatus provides a DC power to the charging socket according to the load power information.