CN212907355U

CN212907355U - Wireless charging transceiver coil winding structure

Info

Publication number: CN212907355U
Application number: CN202021335733.8U
Authority: CN
Inventors: 朱寅; 李黄杰
Original assignee: Zongmu Technology Shanghai Co Ltd
Current assignee: Zongmu Technology Shanghai Co Ltd
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2021-04-06
Anticipated expiration: 2030-07-09

Abstract

The utility model discloses a wireless transceiver coil winding structure that charges, the winding wire of winding structure is the litz wire, constitutes the cross-section of the independent insulated wire of stranded of litz wire is the square. The side length of the square of the section of the wire is d ', d' is 0.886d, and d is the diameter of the circular section of the wire, which is equal to the area of the square of the section of the wire. The utility model discloses under the condition that does not change wireless receiving and dispatching coil winding structure operating parameter/performance that charges, can effectively reduce wireless receiving and dispatching coil volume that charges, improve the product integration degree.

Description

Wireless charging transceiver coil winding structure

Technical Field

The utility model relates to an automotive filed especially relates to a wireless transceiver coil winding structure that charges for wireless battery charging outfit of car.

Background

In recent years, new energy vehicles are rapidly developed, and more people begin to choose to accept an environment-friendly travel mode of an electric vehicle. Meanwhile, many automobile manufacturers consider the automobile development direction in the future and invest a large amount of funds for research and development. However, due to practical obstacles to charging problems, it has not been fully generalized. At present, the most important part of electric vehicles is the batteries and charging devices, and they can only use lithium batteries in a short time due to technical bottlenecks, so that wireless (induction) charging systems become another important research and development point. Compared with a wired charging system, wireless charging has multiple advantages and can conform to the future development trend of new energy automobiles.

The wireless charging system is mainly divided into a Wall end device (electric energy conversion device Wall Box), a ground end coil (BP), a vehicle end controller (VCU) and a vehicle end coil (VP). Among them, the ground end coil (BP) needs to be installed or placed on the ground. The wireless charging receiving and transmitting coil mainly performs the functions of receiving, transmitting and transmitting power, and is the key of wireless charging energy conversion, because the frequency used for wireless charging is generally higher, if the wireless charging receiving and transmitting coil is wound by a common copper wire, higher skin effect and eddy current effect can be generated. Litz wire means that a conductor is formed by twisting or weaving a plurality of independently insulated conductors.

Because the space that traditional circular litz line shared is great, space utilization is lower, and wireless charging is more and more littleer to the requirement of product volume, and efficiency is more and more high, so need improve space utilization, reduce the product volume, improve product efficiency.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a can have wireless transceiver coil that charges relatively under the condition that provides working parameter under the same, can reduce wireless transceiver coil volume that charges, improve the wireless transceiver coil winding structure that charges of product integration level.

In order to solve the technical problem, the utility model provides a wireless transceiver coil winding structure that charges, include: the winding wire of the winding structure is a litz wire, the cross section of each independent insulated wire forming the litz wire is in the same rectangle shape, and the cross section of each independent insulated wire forming the litz wire is in the rectangle shape;

or the cross sections of the independent insulated wires forming the litz wire are the same and circular, and the independent insulated wires are intersected in the tangent lines in the horizontal direction and the vertical direction to form a rectangle.

Optionally, the winding structure of the wireless charging transceiver coil is further improved, and each independent insulated wire forming the litz wire is a square with the same cross section.

Optionally, the winding structure of the wireless charging transceiver coil is further improved, and the litz wire is formed by arranging 3-100 strands of independently insulated wires in parallel.

Optionally, the winding structure of the wireless charging transceiver coil is further improved, and the litz wire is formed by arranging 10 independent insulated wires in parallel.

Optionally, the winding structure of the wireless charging transceiver coil is further improved, when the cross section of the independent insulated wire is the same rectangle, the side length of the square cross section of the wire is d ', d' is 0.886d, and d is the diameter of the circle cross section of the wire, which is equal to the square cross section of the wire.

Optionally, the winding structure of the wireless charging transceiver coil is further improved, and the range of d is 2mm-8 mm.

Optionally, the winding structure of the wireless charging transceiver coil is further improved, and the longest distance between the outermost litz wires on two sides of the winding structure is smaller than 800 mm.

Optionally, the winding structure of the wireless charging transceiver coil is further improved, and the distances between the litz wires of the winding structure are equal.

In order to solve the problem of high skin effect and eddy current effect of the wire, in the prior art, a litz wire with a circular wire cross section is wound to form a wireless charging transceiving coil winding, which is shown in fig. 1 and 2. The effective area of the litz wire of figure 3, in which the wires are circular in cross-section, is the sum of the circular cross-sectional areas of the wires. The utility model discloses with among the prior art litz wire that the wire cross-section is circular shape around being modified to the wire that the wire interface is rectangle (especially square), refer to fig. 4 and show. In the prior art, the cross section of a round wire and the cross sectional area of a rectangular (especially square) wire of the present inventionIn the same case, the operating parameters that can be obtained for the winding structure are the same. However, in the case that the area lines of the circular wire section in the prior art and the rectangular (especially square) wire section in the present invention are the same, referring to fig. 5, the area is expressed according to the area formula

d' is 0.886d, so the whole can make the thickness and width of the wire 88.6% of the original thickness and width. Consequently under the condition that does not change wireless transceiver coil winding structure operating parameter/performance that charges, the utility model discloses can effectively reduce wireless transceiver coil volume that charges, improve the product integration level.

Drawings

The drawings of the present application are intended to illustrate the general nature of methods, structures and/or materials used in accordance with certain exemplary embodiments of the present application, and to supplement the description presented in the specification. The drawings of the present invention, however, are not to scale and may not accurately reflect the precise structural or performance characteristics of any given embodiment, and should not be construed as limiting or restricting the scope of numerical values or attributes encompassed by exemplary embodiments in accordance with the present invention. The present invention will be described in further detail with reference to the following detailed description and accompanying drawings:

fig. 1 is a top view of a winding structure of a wireless charging transceiver coil in the prior art.

Fig. 2 is a cross-sectional view of position a-a in fig. 1.

FIG. 3 is a cross-sectional schematic view of a prior art circular cross-section wire forming a litz wire.

Fig. 4 is a schematic cross-sectional view of a litz wire formed by a wire with a square cross section according to the present invention.

Fig. 5 is a schematic view of the equivalent area of fig. 4.

Fig. 6 is a plan view of the first embodiment of the present invention.

Fig. 7 is a cross-sectional view at position B-B in fig. 6.

Description of the reference numerals

d is the diameter of the circular cross section of the prior art wire

d' is the square section side length of the wire of the utility model.

1 is the prior art each conductor

2 is each wire of the utility model

Detailed Description

The following description of the embodiments of the present invention is provided by way of specific examples, and other advantages and technical effects of the present invention will be fully apparent to those skilled in the art from the disclosure of the present invention. The utility model discloses can also implement or use through different embodiment, each item detail in this specification can also be used based on different viewpoints, carries out various decorations or changes under the general design thought that does not deviate from the utility model. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. The following exemplary embodiments of the present invention may be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art.

First embodiment, as shown in fig. 6 with fig. 7, the utility model provides a wireless transceiver coil winding structure that charges, include: the winding wire of the winding structure is a litz wire, the cross section of a plurality of independent insulated wires 2 forming the litz wire is rectangular, and the cross section of the litz wire formed by each independent insulated wire 2 is rectangular.

The second embodiment, continuing to refer to fig. 6 and combining with fig. 7, the utility model provides a wireless transceiver coil winding structure that charges, include: the winding wire of the winding structure is a litz wire, the cross sections of a plurality of strands of independent insulated wires forming the litz wire are rectangular, the length of the rectangular cross section of each independent insulated wire 2 is the same, the width of the rectangular cross section of each independent insulated wire 2 is the same, and the cross section of the litz wire formed by each independent insulated wire is rectangular.

The third embodiment, it is shown with reference to fig. 6 and fig. 7, the utility model provides a wireless transceiver coil winding structure that charges, include: the winding wire of the winding structure is a litz wire, a plurality of independent insulated wires 2 forming the litz wire are rectangular in cross section, and the cross section of the litz wire formed by the independent insulated wires is rectangular.

The fourth embodiment, the utility model provides a wireless transceiver coil winding structure that charges, include: the winding wire of the winding structure is a litz wire, the cross sections of a plurality of independent insulated wires 2 forming the litz wire are rectangular, the litz wire is formed by arranging the plurality of independent insulated wires in parallel, and the cross section of the litz wire formed by each independent insulated wire is rectangular;

the side length of the square of the section of the wire is d ', d' is 0.886d, and d is the diameter of the circular section of the wire, which is equal to the area of the square of the section of the wire. Wherein d ranges from 2mm to 8mm, the length of the litz wires forming the winding structure is less than 800mm, and the distances among the litz wires forming each circle of the winding structure are equal.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The present invention has been described in detail with reference to the specific embodiments and examples, but these should not be construed as limitations of the present invention. Many variations and modifications may be made by one of ordinary skill in the art without departing from the principles of the present invention.

Claims

1. The utility model provides a wireless transceiver coil winding structure that charges which characterized in that: the winding wire of the winding structure is a litz wire, the cross sections of the independent insulated wires forming the litz wire are identical rectangles, and the cross section of the litz wire formed by the independent insulated wires is rectangular.

2. The wireless charging transceiving coil winding structure of claim 1, wherein: each independent insulated wire forming the litz wire is a square with the same section.

3. The wireless charging transceiving coil winding structure of claim 1, wherein: the litz wire is formed by arranging 3-100 strands of independently insulated wires in parallel.

4. The wireless charging transceiving coil winding structure of claim 3, wherein: the litz wire is formed by 10 strands of independently insulated wires arranged in parallel.

5. The wireless charging transceiving coil winding structure of claim 2, wherein: when the sections of the independent insulated wires are the same rectangle, the side length of the square of the section of the wire is d ', d' is 0.886d, and d is the diameter of the circle of the section of the wire, which is equal to the area of the square of the section of the wire.

6. The wireless charging transceiving coil winding structure of claim 5, wherein: d ranges from 2mm to 8 mm.

7. The wireless charging transceiving coil winding structure of claim 1, wherein: the longest distance between the litz wires forming the outermost turns at both sides of the winding structure is less than 800 mm.

8. The wireless charging transceiving coil winding structure of claim 1, wherein: the distance between the litz wires of the loops forming the winding structure is equal.