CN210837457U - Wireless charging orthogonal coil structure of electric automobile - Google Patents

Abstract

The patent discloses an electric automobile wireless quadrature formula coil structure that charges, this wireless charging coil include transmitting coil and receiving coil. The transmitting coil module comprises a transmitting coil and a transmitting coil iron core, wherein the transmitting coil is formed by two D-shaped coils and a spiral coil in an orthogonal mode, and the transmitting coil iron core is formed by splicing strip-shaped ferrites into a rectangular magnetic substrate. The receiving coil module also comprises two D-shaped coils and a rectangular magnetic substrate. The two coils are of a symmetrical structure, the transmitting coil is installed on the ground, and the receiving coil is installed under the automobile chassis and can be interchanged. The advantages of D shape coil and spiral coil have been synthesized to this patent quadrature formula coil structure, can improve the coil coupling coefficient of coil, anti skew characteristic, improve wireless charging system's robustness promptly.

Description

An orthogonal coil structure for wireless charging of electric vehicles

technical field

The patent relates to an orthogonal coil structure for wireless charging of electric vehicles, and belongs to the technical field of wireless charging.

Background technique

At present, countries all over the world are facing the shortage of traditional fossil energy and deteriorating environmental problems, and clean energy is favored by people. As a new and environmentally friendly means of transportation, electric vehicles have received widespread attention from the society. The traditional electric vehicle charging is mainly carried out through charging piles, and there are problems such as easy wear and tear of equipment, aging, unsafe charging environment, and low charging operation efficiency.

The existing wireless charging of electric vehicles mainly uses a pair of symmetrical coupling coils to transmit energy. Commonly used coils have structures such as disc, DD, and solenoid. The existing coil structure has the problems of low coupling coefficient and poor offset resistance. Therefore, an orthogonal coil structure for wireless charging of electric vehicles is invented to improve the coupling coefficient and anti-offset performance of the coil.

Utility model content

This patent provides an orthogonal coil structure for wireless charging of electric vehicles, which mainly improves the coupling coefficient and anti-offset performance of the coil.

In order to achieve the above-mentioned purpose, the technical scheme of this patent is as follows:

A wireless charging orthogonal coil structure is characterized in that: a rectangular ferrite is used as a magnetic substrate; two coils are arranged on the magnetic substrate, one of the coils is a D-shaped coil 1, one end of which is an external port 1, The other end is connected to the coil 2 through the port 2; the coil 2 is also a D-shaped coil, the other end of which is connected to the coil 3 upward; the coil 3 is a spiral coil, which wraps the coil 1, the coil 2 and the magnetic substrate, the port 4 is the external port 2.

Further, the coil 1 and the coil 2 are in close contact with the magnetic substrate, and the coil 1 and the coil 2 are symmetrically distributed with respect to the center line 1 .

Further, the coil 3 is orthogonal to the coil 1 and the coil 2, and is located above both. The coil 3 is spirally wound on the magnetic substrate and is perpendicular to the center line 1 .

Further, the coil 1 , the coil 2 and the coil 3 are all wound by Litz wire.

Further, the rectangular magnetic substrate is formed by splicing strip-shaped ferrites.

A wireless charging quadrature coil structure includes two parts: a transmitting coil and a receiving coil, and the transmitting coil and the receiving coil both adopt the aforementioned quadrature coil structure.

The advantages of this patent: the advantages of the DD coil and the solenoid coil are combined, and the coupling coefficient and anti-offset performance of the coil are improved.

Description of drawings

Fig. 1 is the overall schematic diagram of the quadrature coil structure of a wireless charging electric vehicle of the present patent;

Symbol Description:

In the figure, 1. Magnetic substrate, 2. Coil 1, 3. Coil 2, 4. Coil 3, 5. Port 1, 6. Port 2, 7. Port 3, 8. Port 4, 9. Center line 1.

Detailed ways

Below in conjunction with accompanying drawing, this patent is described in detail:

An orthogonal coil structure for wireless charging of electric vehicles in this patent is shown in Fig. 1. The structure is divided into a transmitting coil and a receiving coil, both of which are symmetrical and have the same parameters, including a rectangular magnetic substrate (1), a coil 1 ( 2), coil 2 (3) and coil 3 (4), the transmitting coil is installed on the ground, and the receiving coil is installed on the chassis of the car.

The magnetic substrate (1) is a rectangular iron core formed by splicing ferrite. The leakage flux can be reduced and the coupling coefficient can be enhanced.

The coil 1 (2) is a D-shaped coil wound by Litz wire, which is closely attached to the magnetic substrate (1), and the port 1 (5) is connected to an external circuit. It can reduce the skin effect, reduce the magnetic flux leakage, and enhance the anti-offset performance.

The coil 2 (3) is a D-shaped coil wound by Litz wire, which is closely attached to the magnetic substrate (1), and the port 4 (5) is connected to an external circuit. It can reduce the skin effect, reduce the magnetic flux leakage, and enhance the anti-offset performance.

The coil 1 (2) and the coil 2 (3) are connected together by the port 2 (6).

Said coil 3 (4) is a solenoidal coil wound by Litz wire along the magnetic substrate (1), and is orthogonal to the coil 1 (2) and the coil 2 (3), and is located in the coil 1 (2) , Above the coil 2 (3), the coil port 4 (8) is connected to an external circuit. Reduce magnetic flux leakage and enhance offset resistance.

Claims (6)

1. The utility model provides an electric automobile wireless quadrature formula coil structure that charges which characterized in that: a rectangular ferrite as a magnetic substrate (1); the magnetic substrate (1) is provided with two coils, one coil is a D-shaped coil 1(2), one end of the D-shaped coil is an external port 1(5), and the other end of the D-shaped coil is connected with the coil 2(3) through a port 2 (6); the coil 2(3) is also a D-shaped coil, and the other end (7) of the D-shaped coil is upwards connected with the coil 3 (4); the coil 3(4) is a solenoid-shaped coil which wraps the coil 1(2), the coil 2(3) and the magnetic substrate (1), and the port 4(8) is an external port 2.

2. The wireless charging orthogonal coil structure of the electric vehicle according to claim 1, wherein the coil 1(2), the coil 2(3) are closely attached to the magnetic substrate (1), and the coil 1(2) and the coil 2(3) are symmetrically distributed about the center line 1 (9).

3. The wireless charging orthogonal coil structure of the electric vehicle as claimed in claim 1, wherein the coil 3(4) is located above the orthogonal coil 1(2) and the orthogonal coil 2(3), and the coil 3(4) is wound on the magnetic substrate (1) in a spiral manner and perpendicular to the center line 1 (9).

4. The wireless charging orthogonal coil structure of the electric vehicle as claimed in claim 1, wherein the coils 1(2), 2(3) and 3(4) are wound by litz wire.

5. The wireless charging orthogonal coil structure of the electric automobile according to claim 1, characterized in that the magnetic substrate (1) is formed by splicing strip-shaped ferrites.

6. A wireless charging orthogonal coil structure of an electric automobile comprises a transmitting coil and a receiving coil, and is characterized in that the transmitting coil and the receiving coil are in the wireless charging orthogonal coil structure of the electric automobile according to any one of claims 1-5, and the receiving coil and the transmitting coil are the same in structure and parameters and can be replaced.

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