Integrated Charging Coil Module With Shorter Power Path
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Solution Overview
Problem
Conventional wireless charging coils have a long power supply path, leading to high loss and low efficiency due to separate connections through BTB connectors, which increase complexity and cost.
Innovation Solution
An integrated structure of charging coils and circuit boards with direct electrical connections, eliminating separate connectors and reducing the power supply path, thereby improving efficiency and structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the charging coil is electrically connected to the circuit board through a BTB connector, then the connection is established, but the power supply path becomes long and link loss increases
Solution Approach 1:
The patent merges the charging coil and circuit board into an integrated structure where the coil is directly formed on the circuit board substrate. This eliminates the need for separate BTB connectors and reduces the power supply path to a direct electrical connection between the coil and circuit board, thereby reducing link loss and simplifying the overall structure.
2Ease of manufacture
If the charging coil and circuit board are separately prepared and connected through BTB connector, then assembly is possible, but manufacturing cost increases and assembly steps are added
Solution Approach 1:
The charging coil and circuit board are manufactured as a single integrated component. The coil is formed directly on the circuit board substrate through printing or other fabrication methods, eliminating separate manufacturing processes and assembly steps. This reduces both manufacturing cost and production time while improving overall productivity.
3Length of stationary object
If the charging coil is stacked on the circuit board, then connection is achieved, but the thickness of the charging coil module increases
Solution Approach 1:
Instead of stacking the charging coil on top of the circuit board in the thickness direction, the patent integrates the coil into the same plane as the circuit board substrate. The coil and circuit traces are formed on the same layer or overlapping layers of the substrate, eliminating the need for vertical stacking and reducing the overall module thickness.
Data Source
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AI summary
This application provides a charging coil module and a related product thereof, and a preparation method for a charging coil module. In this application, a substrate of a circuit board and a substrate of a charging coil are disposed at a same layer, a first wiring layer and a first coil are disposed at a same layer, and a second wiring layer and a second coil are disposed at a same layer, so that the charging coil and the circuit board form an integrated structure. The first coil and the second coil may be directly electrically connected to a wire on the circuit board, for example, a wire at the first wiring layer of the circuit board or a wire at the second wiring layer of the circuit board. This can shorten a charging path between the charging coil and a load, to reduce a link loss. In addition, a BTB connector can be omitted, to simplify a structure of a charging coil module, and reduce costs of the charging coil module.