USB Interface Inserting Tongue Segmentation for Fast Charging
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Solution Overview
Problem
The standard MICRO USB interface supports charging currents no greater than 3A due to its single charging circuit and low conductivity materials, resulting in slow charging speeds.
Innovation Solution
A USB interface with an inserting tongue of a power line and a ground line, each having at least two inserting portions, forming multiple charging circuits and utilizing high conductivity materials like phosphor bronze to support larger charging currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a standard MICRO USB interface with single charging circuit is used, then the interface structure is simple, but the charging current is limited to no more than 3A resulting in slow charging speed
Solution Approach 1:
The inserting tongue of the power line is divided into multiple inserting portions (at least two), and the inserting tongue of the ground line is divided into multiple inserting portions (at least two). This segmentation allows multiple charging circuits to be formed, enabling charging currents greater than 3A while maintaining a relatively simple overall interface structure.
2Productivity
If metal foil with conductivity less than 20% is used for inserting tongues, then the manufacturing cost is low, but the charging current is limited and charging speed is slow
Solution Approach 1:
The material of the inserting tongues is changed from metal foil with conductivity less than 20% to phosphor bronze with conductivity reaching 50%. This parameter change in material conductivity enables the interface to support charging currents greater than 3A, achieving fast charging capability.
3Power
If a single charging circuit is used in MICRO USB interface, then the device complexity is low, but the charging current is limited to no more than 3A
Solution Approach 1:
The charging circuit is segmented into multiple parallel charging circuits by dividing the power line inserting tongue into multiple inserting portions and the ground line inserting tongue into multiple inserting portions. This allows the total charging current to exceed 3A while keeping each individual charging circuit relatively simple.
Solution Approach 2:
Multiple charging circuits are merged in parallel within the USB interface, combining their current-carrying capacities to achieve total charging currents greater than 3A, thereby increasing power capability without requiring a completely new complex charging system.
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 enhanced USB interface enables fast charging by supporting currents greater than 3A, reducing power consumption and heat, and improving compatibility with existing MICRO USB interfaces.
Implementation Method 1
both the inserting tongue of the power line and the inserting tongue of the ground line included in the USB interface provided in embodiments of the present disclosure are made of phosphor bronze with conductivity reaching 50%
Data Source
AI summary
The present disclosure provides a USB interface and a mobile terminal. The USB interface includes a USB interface main body, an inserting tongue of a power line configured for coupling to an external power line via inserting portions and an inserting tongue of a ground line configured for coupling to an external ground line via inserting portions, in which a bottom of the inserting tongue of the power line and a bottom edge of the inserting tongue of the ground line are coupled to the USB interface main body; the inserting tongue of the power line has P inserting portions extending therefrom, where P is greater than or equal to 2; and the inserting tongue of the ground line has Q inserting portions extending therefrom, where Q is greater than or equal to 2.