Short-distance one-to-many wireless charging device and system

A wireless charging, short-distance technology, applied in the direction of circuit devices, battery circuit devices, circuits, etc., can solve the problems of difficult to achieve design power, reduce transmission power, increase stability, etc., to facilitate large-scale promotion, reduce complexity, The effect of improving stability

Active Publication Date: 2021-07-16
西安电掣风云智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to cost, complexity, there are issues of weight and handling
In a small wireless charging flat panel, the more complex the splicing of the structure and modules, the more hidden concerns the fine structure has. In addition to the magnetic field application, more plastic materials must be used. This superimposed technology crystallization is less durable
It is easy to generate various fault problems. In order to avoid these problems, manufacturers generally reduce the transmission power, cool down at the level invisible to the user, and increase stability at the same time; making it difficult to reach the design power in practical applications

Method used

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  • Short-distance one-to-many wireless charging device and system
  • Short-distance one-to-many wireless charging device and system
  • Short-distance one-to-many wireless charging device and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A short-distance one-to-many wireless charging device, including a transmitting coil. The transmitting coil is a single metal wire wound from the outside to the inside. It is similar to the pattern pattern of "wealth and wealth do not reach the end"; this kind of circuit enters in one line and exits in the same line, so that the current direction of each turn and adjacent turns is opposite, such as Figure 1-2 shown.

[0038] The transmitting coil is set on the substrate, and one line is presented coherently at one time. The entire large substrate is a coil loop, unlike Qi’s that each coil passes through a layer of Litz wire, a layer of glue, and a layer of magnetic chips. A layer of plastic or metal compartments and so on stacked up.

[0039] In some embodiments, figure 1 The central short-circuit area of ​​the middle coil is symmetrical about the center of the coil, and the surrounding magnetic field is averaged, and the central short-circuit area is shown in figur...

Embodiment 2

[0043] The surface of the substrate is covered with a metal layer, because the magnetic field is all from the single-sided copper-clad substrate (copper-clad laminate), so the magnetic field passing through the substrate is less, which reduces the influence of the tangential loss of the substrate on the transmission efficiency of the wireless charging device. The thickness of the copper layer is 1-5 ounces (OZ). In some embodiments, the substrate is FR-4 or PCB, both of which can realize high-efficiency power transmission; the surface of the substrate is covered with a metal layer. In some embodiments, the copper clad laminate does not use a solder mask; higher performance can be obtained by immersion silver.

[0044] Embodiment 2 The simulated magnetic field of the wireless charging device whose substrate is a copper clad laminate, such as Figure 4 (Standard positive center cross-section), the black line on the right side of the figure is the metal layer, which separates th...

Embodiment 3

[0047] structured as Figure 9 Shown, the structure of embodiment 3 and embodiment 1,2 is similar, Figure 9 The distance between adjacent coils with opposite medium current direction is 8mm, the line width is 4mm, and the number of turns of the coil wound from outside to inside is 3; the simulation results are as follows Figure 10 (section of the vertical line on the right) as shown, with image 3 , Figure 4 Compared with the simulation results of Figure 10 The magnetic field distribution at the middle edge is smoother.

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Abstract

The invention discloses a short-distance one-to-many wireless charging device and system. The wireless charging device includes a transmitting coil arranged on a base body. The transmitting coil is wound from the outside to the inside by a single metal wire. After a short circuit in the central area, once Coherently wound from the inside to the outside in opposite directions; one line enters, the same line exits, and the current direction of each turn of wire and adjacent turns of wire is opposite. The invention does not require coil superposition, greatly reduces the volume and weight while maintaining a smooth and uniform near field, and has almost no blind area, so that the receiving device can be spliced ​​arbitrarily on the charging plate, greatly reducing the cost and improving the control. Stability, charging efficiency and applicability.

Description

technical field [0001] The invention belongs to the technical field of induction power, and relates to a short-distance one-to-many wireless charging device and system. Background technique [0002] The coils used in most existing wireless charging devices mainly use the QI technical standard: composed of tightly wound coils and magnetic cores, using the principle of electromagnetic induction, energy is transmitted through continuous energy coupling of the coils, and the coil and magnetic cores work together to improve transmission efficiency . [0003] At present, the credibility of Qi makes wireless power manufacturers generally use Qi-type coil modules from foreign manufacturers, and they must use Qi-type coil modules as a reference. Even if the coil is customized, it often directly uses the multi-turn coil of the coil manufacturer; It can also be clearly seen from the papers and published patents that most of the technical solutions are based on Qi-type coil modules and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/12H02J50/00H02J7/00H01F27/28H01F38/14
CPCH01F27/28H01F27/2804H01F38/14H02J7/0042H02J50/12H02J50/005
Inventor 李谦
Owner 西安电掣风云智能科技有限公司
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