CN110690038A - A wireless charging device - Google Patents
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- CN110690038A CN110690038ACN201910882613.5ACN201910882613ACN110690038ACN 110690038 ACN110690038 ACN 110690038ACN 201910882613 ACN201910882613 ACN 201910882613ACN 110690038 ACN110690038 ACN 110690038A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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Abstract
Translated fromChineseDescription
Translated fromChinese技术领域technical field
本发明属于无线充电技术领域，具体涉及一种无线充电装置。The invention belongs to the technical field of wireless charging, and in particular relates to a wireless charging device.
背景技术Background technique
随着现代社会的发展，电子设备不断更新，人们对电子设备的性能和功能提出了更高的要求。传统充电方式在使用时给人们生活带来很多不便，无线充电方式应运而生，解决了传统充电方式采用充电线材带来的不便。无线充电方式主要以电磁感应原理，无需充电线材与手机设备接触，方便快捷，但是弊端是充电效率低于传统的有线充电方式，如何提高充电效率是无线充电技术上的一个难题。With the development of modern society, electronic equipment is constantly updated, and people put forward higher requirements for the performance and function of electronic equipment. The traditional charging method brings a lot of inconvenience to people's lives, and the wireless charging method emerges as the times require, which solves the inconvenience caused by the traditional charging method using charging wires. The wireless charging method is mainly based on the principle of electromagnetic induction, which is convenient and fast without the need for the charging wire to contact the mobile phone device. However, the disadvantage is that the charging efficiency is lower than that of the traditional wired charging method. How to improve the charging efficiency is a difficult problem in wireless charging technology.
现有技术中用于无线电力传输的无线充电装置，包括无线充电发射器和无线充电接收器，且均设置有无线充电线圈，该无线充电线圈包括励磁层和设置在励磁层上的平面线圈，平面线圈绕制形成线圈环形回路。无线充电发射器的无线充电线圈用于通电产生电磁信号，无线充电接收器的无线充电线圈用于感应该电磁信号，从而产生电流给用电设备。现有技术中的这种无线充电线圈的缺陷是无线充电效率较低、实用性差。A wireless charging device for wireless power transmission in the prior art includes a wireless charging transmitter and a wireless charging receiver, and both are provided with a wireless charging coil. The wireless charging coil includes an excitation layer and a planar coil arranged on the excitation layer. The planar coil is wound to form a toroidal loop of the coil. The wireless charging coil of the wireless charging transmitter is used to generate an electromagnetic signal when energized, and the wireless charging coil of the wireless charging receiver is used to induce the electromagnetic signal to generate current to the electrical equipment. The defects of such a wireless charging coil in the prior art are that the wireless charging efficiency is low and the practicability is poor.
申请公布号为CN110189897A的中国发明专利申请提出了一种无线充电线圈，利用同一绝缘导线设计两个线圈环形回路，使无线充电线圈通电后产生的磁场加强，相对提高了无线充电效率，但是，在无线充电线圈进行能量传输的过程中，线圈环形回路会产生辐射散射，导致电磁辐射污染，不利于无线充电作业区域外的环境安全；另外由于线圈环形回路会产生辐射散射，也会导致无线充电效率降低。The Chinese invention patent application with the application publication number CN110189897A proposes a wireless charging coil, which uses the same insulated wire to design two coil loops to strengthen the magnetic field generated after the wireless charging coil is energized, which relatively improves the wireless charging efficiency. In the process of energy transmission by the wireless charging coil, the loop loop of the coil will generate radiation scattering, resulting in electromagnetic radiation pollution, which is not conducive to the environmental safety outside the wireless charging operation area; in addition, the loop loop of the coil will generate radiation scattering, which will also lead to wireless charging efficiency. reduce.
发明内容SUMMARY OF THE INVENTION
本发明的目的是提供一种无线充电装置，用于解决现有无线充电线圈在无线充电过程中充电效率降低的问题。The purpose of the present invention is to provide a wireless charging device for solving the problem that the charging efficiency of the existing wireless charging coil decreases during the wireless charging process.
基于上述目的，一种无线充电装置的技术方案一如下：Based on the above purpose, a first technical solution of a wireless charging device is as follows:
包括无线充电线圈，无线充电线圈包括励磁层和由同一绝缘导线绕制而成的线圈环形回路，所述线圈环形回路包括第一线圈环形回路和第二线圈环形回路，其中，第一线圈环形回路设置在所述励磁层上端面上，且第一线圈环形回路所在平面与所述励磁层平行，第二线圈环形回路环绕所述励磁层的上、下端面和两个侧面设置；且通电后，第二线圈环形回路在上端面上的边与第一线圈环形回路的边的电流方向一致，所述第二线圈环形回路在上端面上的边与所述第一线圈环形回路的边就近设置，第一线圈环形回路的外围布置有由导磁材料构成的电磁屏蔽板，该电磁屏蔽板固定在所述励磁层的上端面，且电磁屏蔽板在励磁层上端面的高度高于第一线圈环形回路在励磁层上端面的高度。Including a wireless charging coil, the wireless charging coil includes an excitation layer and a coil toroidal loop wound by the same insulated wire, the coil toroidal loop includes a first coil toroidal loop and a second coil toroidal loop, wherein the first coil toroidal loop It is arranged on the upper end face of the excitation layer, and the plane where the first coil annular loop is located is parallel to the excitation layer, and the second coil annular loop is arranged around the upper and lower end faces and two side surfaces of the excitation layer; and after power-on, The side of the second coil loop on the upper end face is consistent with the current direction of the side of the first coil loop, and the side of the second coil loop on the upper end face and the side of the first coil loop are arranged close to each other, An electromagnetic shielding plate made of magnetic conductive material is arranged on the periphery of the first coil annular loop, the electromagnetic shielding plate is fixed on the upper end face of the excitation layer, and the height of the electromagnetic shielding plate on the upper end face of the excitation layer is higher than that of the first coil annular loop The height of the end face of the loop on the excitation layer.
上述技术方案的有益效果是：The beneficial effects of the above technical solutions are:
本发明的无线充电装置由于在第一线圈环形回路的外围布置了电磁屏蔽板，电磁屏蔽板在励磁层上端面的高度高于第一线圈环形回路在励磁层上端面的高度，能够屏蔽充电线圈在传输能量过程中产生的辐射散射，起到良好的电磁屏蔽效果。并且，由于电磁屏蔽板的作用，增大了无线充电线圈通电后的磁路面积，使无线充电线圈通电后工作区(用于传输电能)的磁场强度大幅度增加，有利于提高电能传输的效率。In the wireless charging device of the present invention, an electromagnetic shielding plate is arranged on the periphery of the first coil annular loop, and the height of the electromagnetic shielding plate on the upper end face of the excitation layer is higher than that of the first coil annular loop on the upper end face of the excitation layer, which can shield the charging coil. The radiation scattering generated in the process of energy transmission has a good electromagnetic shielding effect. In addition, due to the effect of the electromagnetic shielding plate, the magnetic circuit area after the wireless charging coil is energized is increased, so that the magnetic field strength of the working area (used to transmit electric energy) after the wireless charging coil is energized is greatly increased, which is beneficial to improve the efficiency of electric energy transmission. .
为了提高电磁屏蔽效果，进一步，所述电磁屏蔽板为铁氧体材料构成的屏蔽板，铁磁性材料可以使工作区的磁场大幅度增加，使非工作区的磁场减小。In order to improve the electromagnetic shielding effect, further, the electromagnetic shielding plate is a shielding plate made of ferrite material, and the ferromagnetic material can greatly increase the magnetic field in the working area and reduce the magnetic field in the non-working area.
为了提高电磁屏蔽效果，进一步，所述励磁层为铁氧体材料构成的励磁层，且所述电磁屏蔽板与所述励磁层为一体化的集成结构。In order to improve the electromagnetic shielding effect, further, the excitation layer is an excitation layer composed of a ferrite material, and the electromagnetic shielding plate and the excitation layer are an integrated integrated structure.
进一步，所述励磁层与电磁屏蔽板粘接固定。作为其他实施方式，还可以使用非铁磁性材料的夹具固定安装。直接粘接安装会更加方便快捷，同时减少使用材料。Further, the excitation layer is bonded and fixed to the electromagnetic shielding plate. As another embodiment, a fixture of non-ferromagnetic material can also be used for fixed installation. Direct bonding installation is more convenient and quicker, while reducing the use of materials.
为了提高电磁屏蔽效果，进一步，所述励磁层和电磁屏蔽板的外围套接有U型铝板屏蔽层，铝板属于非铁磁性金属，非铁磁性材料的屏蔽机理是由于材料内部产生的涡流生成了反向的磁场，与原边源之间的磁场相互抵消从而起到屏蔽作用。因此，铝板屏蔽层不仅能够有效屏蔽非工作区的磁场泄露，降低非工作区的磁场指标，还能够增强工作区的磁场，使耦合更加紧密，进而实现铝板屏蔽层和电磁屏蔽板形成双层屏蔽机构。In order to improve the electromagnetic shielding effect, further, a U-shaped aluminum plate shielding layer is sleeved on the periphery of the excitation layer and the electromagnetic shielding plate. The aluminum plate is a non-ferromagnetic metal. The opposite magnetic field cancels each other out with the magnetic field between the primary source and thus plays a shielding role. Therefore, the aluminum shielding layer can not only effectively shield the magnetic field leakage in the non-working area, reduce the magnetic field index in the non-working area, but also enhance the magnetic field in the working area and make the coupling tighter, thereby realizing the double-layer shielding of the aluminum shielding layer and the electromagnetic shielding plate. mechanism.
基于上述目的，一种无线充电装置的技术方案二如下：Based on the above purpose, a second technical solution of a wireless charging device is as follows:
包括无线充电线圈，无线充电线圈包括励磁层和由同一绝缘导线绕制而成的线圈环形回路，所述线圈环形回路包括第一线圈环形回路和第三线圈环形回路，第二线圈环形回路和第四线圈环形回路，其中，第一线圈环形回路和第三线圈环形回路相邻设置在所述励磁层上端面上，且第一线圈环形回路和第三线圈环形回路的所在平面均与所述励磁层平行；第二线圈环形回路和第四线圈环形回路相邻的环绕所述励磁层的上、下端面和两个侧面设置；且通电后，第二线圈环形回路和第四线圈环形回路在上端面上的边，与第一线圈环形回路和第三线圈环形回路的边的电流方向一致，所述第二线圈环形回路在上端面上的边与所述第一线圈环形回路的边就近设置，所述第四线圈环形回路在上端面上的边与所述第三线圈环形回路的边就近设置；Including a wireless charging coil, the wireless charging coil includes an excitation layer and a coil toroidal loop wound by the same insulated wire, the coil toroidal loop includes a first coil toroidal loop and a third coil toroidal loop, and the second coil toroidal loop and the first Four-coil toroidal loop, wherein the first coil toroidal loop and the third coil toroidal loop are adjacently arranged on the upper end surface of the excitation layer, and the planes of the first coil toroidal loop and the third coil toroidal loop are parallel to the excitation The layers are parallel; the second coil toroidal loop and the fourth coil toroidal loop are adjacently arranged around the upper and lower end faces and two sides of the excitation layer; and after electrification, the second and fourth coil toroidal loops are on the top The side of the end face is consistent with the current direction of the side of the first coil loop and the third coil loop, and the side of the second coil loop on the upper end face and the side of the first coil loop are arranged close to each other, The edge of the fourth coil annular loop on the upper end face and the edge of the third coil annular loop are arranged close to each other;
其中，第一线圈环形回路和第三线圈环形回路的外围布置有由导磁材料构成的电磁屏蔽板，该电磁屏蔽板固定在所述励磁层的上端面，且电磁屏蔽板在励磁层上端面的高度高于第一线圈环形回路、第三线圈环形回路在励磁层上端面的高度。Wherein, an electromagnetic shielding plate made of magnetic conductive material is arranged on the periphery of the first coil loop loop and the third coil loop loop, the electromagnetic shielding plate is fixed on the upper end surface of the excitation layer, and the electromagnetic shielding plate is on the upper end surface of the excitation layer. The height is higher than the heights of the first coil loop loop and the third coil loop loop on the upper end face of the excitation layer.
上述技术方案的有益效果是：The beneficial effects of the above technical solutions are:
本发明的无线充电装置由于在第一线圈环形回路和第三线圈环形回路的外围布置了电磁屏蔽板，电磁屏蔽板在励磁层上端面的高度高于第一线圈环形回路、第三线圈环形回路在励磁层上端面的高度，能够屏蔽充电线圈在传输能量过程中产生的辐射散射，起到良好的电磁屏蔽效果。并且，由于电磁屏蔽板的作用，增大了无线充电线圈通电后的磁路面积，使无线充电线圈通电后工作区(用于传输电能)的磁场强度大幅度增加，有利于提高电能传输的效率。In the wireless charging device of the present invention, electromagnetic shielding plates are arranged on the periphery of the first coil loop loop and the third coil loop loop, and the height of the upper end face of the electromagnetic shield plate on the excitation layer is higher than that of the first coil loop loop and the third coil loop loop. The height of the upper end face of the excitation layer can shield the radiation scattering generated by the charging coil during the energy transmission process, and has a good electromagnetic shielding effect. In addition, due to the effect of the electromagnetic shielding plate, the magnetic circuit area after the wireless charging coil is energized is increased, so that the magnetic field strength of the working area (used to transmit electric energy) after the wireless charging coil is energized is greatly increased, which is beneficial to improve the efficiency of electric energy transmission. .
为了提高电磁屏蔽效果，进一步，所述电磁屏蔽板为铁氧体材料构成的屏蔽板，铁磁性材料可以使工作区的磁场大幅度增加，使非工作区的磁场减小。In order to improve the electromagnetic shielding effect, further, the electromagnetic shielding plate is a shielding plate made of ferrite material, and the ferromagnetic material can greatly increase the magnetic field in the working area and reduce the magnetic field in the non-working area.
为了提高电磁屏蔽效果，进一步，所述励磁层为铁氧体材料构成的励磁层，且所述电磁屏蔽板与所述励磁层为一体化的集成结构。In order to improve the electromagnetic shielding effect, further, the excitation layer is an excitation layer composed of a ferrite material, and the electromagnetic shielding plate and the excitation layer are an integrated integrated structure.
进一步，所述励磁层与电磁屏蔽板粘接固定。作为其他实施方式，还可以使用非铁磁性材料的夹具固定安装，直接粘接安装会更加方便快捷，同时减少使用材料。Further, the excitation layer is bonded and fixed to the electromagnetic shielding plate. As another embodiment, a fixture of non-ferromagnetic material can also be used for fixed installation, and direct adhesive installation will be more convenient and quicker, and at the same time reduce the use of materials.
为了提高电磁屏蔽效果，进一步，所述励磁层和电磁屏蔽板的外围套接有U型铝板屏蔽层，铝板属于非铁磁性金属，非铁磁性材料的屏蔽机理是由于材料内部产生的涡流生成了反向的磁场，与原边源之间的磁场相互抵消从而起到屏蔽作用。因此，铝板屏蔽层不仅能够有效屏蔽非工作区的磁场泄露，降低非工作区的磁场指标，还能够增强工作区的磁场，使耦合更加紧密，进而实现铝板屏蔽层和电磁屏蔽板形成双层屏蔽机构。In order to improve the electromagnetic shielding effect, further, a U-shaped aluminum plate shielding layer is sleeved on the periphery of the excitation layer and the electromagnetic shielding plate. The aluminum plate is a non-ferromagnetic metal. The opposite magnetic field cancels each other out with the magnetic field between the primary source and thus plays a shielding role. Therefore, the aluminum shielding layer can not only effectively shield the magnetic field leakage in the non-working area, reduce the magnetic field index in the non-working area, but also enhance the magnetic field in the working area and make the coupling tighter, thereby realizing the double-layer shielding of the aluminum shielding layer and the electromagnetic shielding plate. mechanism.
附图说明Description of drawings
图1是本发明的无线充电线圈和电磁屏蔽结构的剖面示意图；1 is a schematic cross-sectional view of a wireless charging coil and an electromagnetic shielding structure of the present invention;
图2是本发明的一种无线充电线圈的俯视图；2 is a top view of a wireless charging coil of the present invention;
图3是本发明的一种无线充电线圈的侧视图；3 is a side view of a wireless charging coil of the present invention;
图4是本发明的无线充电线圈的应用场景示意图；4 is a schematic diagram of an application scenario of the wireless charging coil of the present invention;
图5是本发明的另一种无线充电线圈和电磁屏蔽结构的剖面示意图；5 is a schematic cross-sectional view of another wireless charging coil and electromagnetic shielding structure of the present invention;
图6是本发明的另一种无线充电线圈的俯视图；6 is a top view of another wireless charging coil of the present invention;
附图的标号说明如下：The reference numbers of the accompanying drawings are as follows:
1——第一线圈环形回路，2——第二线圈环形回路，3——第三线圈环形回路，4——第四线圈环形回路，5——励磁层，1-1——第一线圈环形回路的边，2-1——第二线圈环形回路在励磁层上端面上的边，3-1——第三线圈环形回路的边，4-1——第四线圈环形回路在励磁层上端面上的边，6——无线充电发射器，7——无线充电接收器，8、8-1、8-2——电磁屏蔽板，9——U型铝板屏蔽层。1 - the first coil loop, 2 - the second coil loop, 3 - the third coil loop, 4 - the fourth coil loop, 5 - the excitation layer, 1-1 - the first coil The side of the loop, 2-1——the side of the second coil loop on the upper end face of the excitation layer, 3-1——the side of the third coil loop, 4-1——the fourth coil loop on the excitation layer On the side of the upper end face, 6 - wireless charging transmitter, 7 - wireless charging receiver, 8, 8-1, 8-2 - electromagnetic shielding plate, 9 - U-shaped aluminum plate shielding layer.
具体实施方式Detailed ways
本发明的无线充电装置，既可以是无线充电发射器，可以是无线充电接收器，且本发明的无线充电装置的改进在于，提出了一种新的无线充电线圈和电磁屏蔽板。下面结合附图对本发明的具体实施方式作进一步的说明。The wireless charging device of the present invention can be either a wireless charging transmitter or a wireless charging receiver, and the improvement of the wireless charging device of the present invention is that a new wireless charging coil and an electromagnetic shielding plate are proposed. The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.
实施例一：Example 1:
如图1所示的一种无线充电装置，包括无线充电线圈，电磁屏蔽板(8-1、8-2)和U型铝板屏蔽层9，其中无线充电线圈包括励磁层5，以及由同一绝缘导线绕制而成的第一线圈环形回路1、第二线圈环形回路2、第三线圈环形回路3、第四线圈环形回路4。为了方面描述四个线圈环形回路的位置关系，在图1中以励磁层的中垂线为y轴，沿励磁层的水平方向为x轴，绘制坐标系。As shown in FIG. 1, a wireless charging device includes a wireless charging coil, electromagnetic shielding plates (8-1, 8-2) and a U-shaped aluminum plate shielding layer 9, wherein the wireless charging coil includes an
如图1所示，四个线圈环形回路分别位于四个象限，且绕制的形状均为矩形。其中，第一线圈环形回路1和第三线圈环形回路3相邻设置在励磁层5上端面上，且第一线圈环形回路1和第三线圈环形回路3的所在平面均与励磁层5平行。另外，第一线圈环形回路1和第三线圈环形回路3的外围布置有电磁屏蔽板(8-1、8-2)，U型铝板屏蔽层9套接在励磁层5和电磁屏蔽板(8-1、8-2)的外围。该电磁屏蔽板为设置在励磁层端部的铁氧体屏蔽板(即铁氧体材料构成的屏蔽板，铁氧体材料如NiZn铁氧体、MnZn铁氧体等)，如图1所示，铁氧体屏蔽板在上端面上，铁氧体屏蔽板在励磁层上端面的高度高于第一线圈环形回路、第三线圈环形回路在励磁层上端面的高度。作为其他实施方式，设置铁氧体屏蔽板在励磁层上端面的高度，也可以和第一线圈环形回路、第三线圈环形回路在励磁层上端面的高度相当，达到磁屏蔽效果即可。As shown in Figure 1, the four coil loops are located in four quadrants respectively, and the winding shapes are all rectangular. The
第二线圈环形回路2和第四线圈环形回路4相邻的环绕励磁层5的上、下端面和两个侧面设置，且第二线圈环形回路2的所在平面和第四线圈环形回路4的所在平面平行。且无线充电线圈通电后，第二线圈环形回路在励磁层上端面上的边2-1和第四线圈环形回路在励磁层上端面上的边4-1，与第一线圈环形回路1-1和第三线圈环形回路的边3-1的电流方向一致。第二线圈环形回路在励磁层上端面上的边2-1与第一线圈环形回路的边1-1就近设置，第四线圈环形回路在励磁层上端面上的边4-1与第三线圈环形回路的边3-1就近设置。The
励磁层5的上端面上开有两个相邻设置的凹槽，分别用于放置第二线圈环形回路2和第四线圈环形回路4的绝缘导线，以保证第一线圈环形回路1和第三线圈环形回路3的平整设置。另外，当第二线圈环形回路2和第四线圈环形回路4的线圈匝数为多匝时，将第二线圈环形回路2的绝缘导线放置在一个凹槽中，第四线圈环形回路4的绝缘导线放置在另一个凹槽中，有助于提高无线充电线圈通电后磁场的加强效果。There are two adjacently arranged grooves on the upper end surface of the
励磁层5的左右端面高于线圈上表面，分别用来包裹第一线圈环形回路1和第三线圈环形回路3的绝缘导线，以保证线圈上表面的平整设计，同时也能增大磁路面积使工作区的磁场强度大幅度增加,有利于提高电能传输的效率。The left and right end surfaces of the
图1中，椭圆形标识区域定义为线圈中央区域，四个线圈环形回路的绕制过程如图2、图3所示，第二线圈环形回路2的入端按图2中箭头指示方向进入，由励磁层5下端面按逆时针方向(从x轴正向观察)绕过励磁层5，绕制一定周数(即匝数)，在励磁层5的线圈中央区域转向第一线圈环形回路1的绕制，第一线圈环形回路1按逆时针方向(从y轴正向观察)环形堆叠绕制一定周数，从励磁层5的线圈中央区域转向第三线圈环形回路3的绕制，第三线圈环形回路3按顺时针方向(从y轴正向观察)环形堆叠绕制一定周数，从励磁层5的线圈中央区域转向第四线圈环形回路4的绕制，第四线圈环形回路4按逆时针方向(从x轴正向观察)向下绕过励磁层5，围绕励磁层5绕制一定周数。In Figure 1, the elliptical identification area is defined as the central area of the coil. The winding process of the four coil loops is shown in Figures 2 and 3. The input end of the
以上线圈在绕制时，线圈中央区域内的部分绕制方向一致，即第一线圈环形回路的边1-1、第三线圈环形回路的边3-1、第四线圈环形回路在励磁层上端面上的边4-1和第二线圈环形回路在励磁层上端面上的边2-1的绕制方向一致，图1中，电流方向用点和叉表示(点表示垂直图1的平面由图内指向图外，叉表示垂直图1的平面由图外指向图内)，其中，线圈中央区域内的边1-1、2-1、3-1、4-1的电流方向为点，图1所示。当然，线圈中央区域内的边的电流方向全部为叉也可。另外，四个线圈环形回路的绕制形式可堆叠可平铺，能够加强中央磁路。When the above coils are wound, the winding directions of the parts in the central area of the coils are the same, that is, the side 1-1 of the first coil loop, the side 3-1 of the third coil loop, and the fourth loop loop are on the excitation layer. The winding directions of the side 4-1 on the end face and the side 2-1 of the second coil annular loop on the upper end face of the excitation layer are the same. The inside of the figure points to the outside of the figure, and the cross indicates that the plane perpendicular to Figure 1 points from the outside to the inside of the figure), wherein the current directions of the sides 1-1, 2-1, 3-1, and 4-1 in the central area of the coil are points, Figure 1. Of course, all the current directions of the sides in the coil center region may be forks. In addition, the winding form of the four coil loops can be stacked and tiled, which can strengthen the central magnetic circuit.
本实施例的无线充电线圈，上层线圈环形回路的所在平面与下方线圈环形回路的所在平面互相垂直，即第一线圈环形回路的所在平面与第二线圈环形回路的所在平面垂直，第三线圈环形回路的所在平面与第四线圈环形回路的所在平面垂直，无线充电线圈充电时，线圈中央区域的绝缘导线内通过的电流方向一致，产生的磁场互相加强，有利于提高无线充电能量传输的效率。In the wireless charging coil of this embodiment, the plane of the upper coil loop is perpendicular to the plane of the lower coil loop, that is, the plane of the first coil loop is perpendicular to the plane of the second coil loop, and the third coil loop is perpendicular to the plane of the second coil loop. The plane of the loop is perpendicular to the plane of the loop loop of the fourth coil. When the wireless charging coil is charging, the direction of the current passing through the insulated wire in the central area of the coil is the same, and the generated magnetic fields strengthen each other, which is beneficial to improve the efficiency of wireless charging energy transmission.
本实施例的无线充电线圈，能作为无线充电发射器中的发射线圈，和无线充电接收器中的接收线圈，作为发射线圈用时，本实施例的无线充电装置即为无线充电发射器；作为接受线圈用时，本实施例的无线充电装置即为无线充电接收器。其应用场景，既可以用于汽车电池的无线充电，也可用于便携式设备的无线充电，如手机的无线充电。例如，应用至无线充电系统，如图4所示，该无线充电系统包括具有无线充电线圈和电磁屏蔽结构的无线充电发射器6和无线充电接收器7。The wireless charging coil of this embodiment can be used as a transmitting coil in a wireless charging transmitter and a receiving coil in a wireless charging receiver. When used as a transmitting coil, the wireless charging device in this embodiment is a wireless charging transmitter; as a receiving coil When the coil is used, the wireless charging device of this embodiment is a wireless charging receiver. Its application scenarios can be used not only for wireless charging of car batteries, but also for wireless charging of portable devices, such as wireless charging of mobile phones. For example, when applied to a wireless charging system, as shown in FIG. 4 , the wireless charging system includes a
本实施例中，铁氧体屏蔽板和励磁层为一体化设计的结构，励磁线(既指线圈环形回路的绝缘导线，也包括励磁层中的绝缘导线)完全镶嵌起来。这样是不仅增大磁路面积使工作区的磁场强度大幅度增加,有利于提高电能传输的效率，而且使非工作区的磁场减小，加强了无线充电线圈四周的漏磁场屏蔽，有利于EMF(electromagneticfield，电磁场)测试。In this embodiment, the ferrite shielding plate and the excitation layer are integrally designed structures, and the excitation wires (not only the insulated wires of the coil loop loop, but also the insulated wires in the excitation layer) are completely embedded. This not only increases the magnetic circuit area and greatly increases the magnetic field strength in the working area, which is conducive to improving the efficiency of power transmission, but also reduces the magnetic field in the non-working area, which strengthens the shielding of the leakage magnetic field around the wireless charging coil, which is beneficial to EMF. (electromagneticfield, electromagnetic field) test.
以上所述仅为本发明的优选实施例，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。例如，本实施例中仅在励磁层端部设置有铁氧体屏蔽板，作为其他实施方式，还可以在励磁层的下端面设置有与其大小相当的铁氧体屏蔽板，以提高电磁屏蔽效果。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. For example, in this embodiment, a ferrite shielding plate is only provided at the end of the excitation layer. As another embodiment, a ferrite shielding plate of the same size may be provided on the lower end surface of the excitation layer to improve the electromagnetic shielding effect. .
又如，对于本实施例中的无线充电线圈，第四线圈环形回路在励磁层上端面上的边4-1与第二线圈环形回路在励磁层上端面上的边2-1是平行的，作为其他实施方式，保持基本平行也是可行的，不必严格平行。For another example, for the wireless charging coil in this embodiment, the side 4-1 of the fourth coil loop on the upper end face of the excitation layer is parallel to the side 2-1 of the second coil loop loop on the upper end face of the excitation layer, As other implementations, it is also feasible to keep substantially parallel, and it is not necessary to be strictly parallel.
又如，本实施例中的第一线圈环形回路和第三线圈环形回路的绕制形状为矩形，作为其他实施方式，还可以为椭圆形，此时，可将第一线圈环形回路中与第二线圈环形回路在励磁层上端面上的边靠近的一段绝缘导线，作为第一线圈环形回路的边；同理，将第三线圈环形回路中与第四线圈环形回路在励磁层上端面上的边靠近的一段绝缘导线，作为第三线圈环形回路的边。For another example, the winding shapes of the first coil toroidal loop and the third coil toroidal loop in this embodiment are rectangles, and as other implementations, they may also be elliptical shapes. A section of insulated wire close to the edge of the second coil annular loop on the upper end face of the excitation layer is used as the edge of the first coil annular loop; similarly, connect the third coil annular loop and the fourth coil annular loop on the upper end face of the excitation layer. A piece of insulated wire close to the edge is used as the edge of the third coil loop.
实施例二：Embodiment 2:
本实施例的无线充电装置如图5、图6所示，包括无线充电线圈和电磁屏蔽板8，无线充电线圈包括励磁层5和由同一绝缘导线绕制而成的线圈环形回路，线圈环形回路包括第一线圈环形回路1和第二线圈环形回路2，其中，第一线圈环形回路1设置在励磁层5的上端面上，且第一线圈环形回路1所在的平面与励磁层5平行。As shown in Figures 5 and 6, the wireless charging device of this embodiment includes a wireless charging coil and an
第二线圈环形回路2环绕励磁层5的上、下端面和两个侧面设置；且通电后，第二线圈环形回路2在上端面上的边2-1与第一线圈环形回的边1-1的电流方向一致，第二线圈环形回路在上端面上的边2-1与第一线圈环形回路的边1-1就近设置。励磁层5的上端面开设有凹槽，当第二线圈环形回路2的线圈匝数为多匝时，将第二线圈环形回路2的绝缘导线放置在凹槽中。The
励磁层5的左、右端设置有铁氧体屏蔽板8(电磁屏蔽板)，铁氧体屏蔽板8在励磁层上端面的高度高于第一线圈环形回路1在励磁层上端面的高度，分别用来包裹第一线圈环形回路1的绝缘导线，以保证线圈上表面的平整设计，同时也能增大磁路面积使工作区的磁场强度大幅度增加,有利于提高电能传输的效率。The left and right ends of the
本实施例中，铁氧体屏蔽板8和励磁层5为一体设计的结构，以增加磁屏蔽效果，且在层励磁层5和电磁屏蔽板8的外围套接有U型铝板屏蔽层9。In this embodiment, the
由于本实施例的无线充电线圈，实际上是线圈实施例一中的无线充电线圈的一半，在结构上仅为图1中以y轴为界的左半部分或右半部分，故不再详细进行描述。Since the wireless charging coil in this embodiment is actually half of the wireless charging coil in the first coil, its structure is only the left half or the right half bounded by the y-axis in FIG. 1 , so it will not be detailed here. describe.
需要说明的是，本发明提到的左、右、上和下等方位用语，仅是互为相对概念，而不应该认为是具有限制性的。且本发明提到的平行，是理想状态下的相对位置关系，在实际应用是接近平行即可。It should be noted that the directional terms such as left, right, upper and lower mentioned in the present invention are only relative concepts to each other, and should not be regarded as limiting. And the parallel mentioned in the present invention is a relative positional relationship in an ideal state, and in practical applications, it is sufficient to be close to parallel.
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| WO2022104916A1 (en)* | 2020-11-23 | 2022-05-27 | 瑞声声学科技(深圳)有限公司 | Electronic device and wireless charging system |
| WO2022104911A1 (en)* | 2020-11-23 | 2022-05-27 | 瑞声声学科技(深圳)有限公司 | Electronic device and wireless charging system |
| CN112510845B (en)* | 2020-11-23 | 2022-12-06 | 瑞声新能源发展(常州)有限公司科教城分公司 | Electronic equipment and wireless charging system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021051993A1 (en) | 2021-03-25 |
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| TA01 | Transfer of patent application right | Effective date of registration:20200525 Address after:461000 Xu Jixin Energy Industrial Park, Central Plains Electric Valley, Xuchang City, Henan Province Applicant after:XJ POWER Co.,Ltd. Applicant after:STATE GRID ZHEJIANG ELECTRIC POWER Co.,Ltd. Address before:461000 Central Plains Electric Valley New Energy Industrial Park, Xuchang City, Henan Province (south of Shangde Road east of Weiwu Avenue) Applicant before:XJ POWER Co.,Ltd. | |
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