CN216390610U - Coil units, wireless charging systems, chargers and electrical equipment - Google Patents

Abstract

The utility model provides a coil unit which comprises a ring-shaped coil and a positioning assembly, wherein the positioning assembly is arranged on at least one of the outer periphery and the inner periphery of the coil, the positioning assembly is of a ring-shaped structure formed by arranging a plurality of permanent magnets along the circumferential direction of the coil, each permanent magnet comprises a first magnetic steel and a second magnetic steel which are arranged along the radial direction of the coil and are in an arc shape, the first magnetic steel forms a ring-shaped first magnetic part, the second magnetic steel forms a ring-shaped second magnetic part, the first magnetic steel is magnetized along the axial direction of the first magnetic part, and the second magnetic steel is magnetized along the direction vertical to the chord of the second magnetic part. The utility model also provides a charger, electric equipment and a wireless charging system, and the coil unit, the wireless charging system, the charger and the electric equipment provided by the utility model can avoid the problems of charging efficiency reduction and heating increase caused by dislocation of the transmitting coil and the induction coil.

Description

Coil units, wireless charging systems, chargers and electrical equipment

【Technical field】

The utility model relates to the field of wireless charging, in particular to a coil unit, a wireless charging system, a charger and electrical equipment.

【Background technique】

Wireless charging is a non-contact inductive charging based on the principle of inductive coupling. It realizes energy transfer through energy coupling through coils. Therefore, both the charger and the electrical equipment can have no exposed conductive contacts.

The existing wireless charging system includes two coil units, the coil unit includes a coil and a magnetic positioning component, one of the two coil units is a transmitter applied to the charger, and the other is a receiver applied to the electrical equipment. , wherein the coil at the transmitting end is the transmitting coil, the coil at the receiving end is the induction coil, the induction coil is configured to receive power from the transmitting coil to charge the electrical equipment, and the magnetic positioning assembly is used to realize the automatic alignment of the transmitting coil and the induction coil. However, in the wireless charging system in the related art, due to the structural limitation of the magnetic positioning assembly, the transmitter coil and the induction coil are easy to move, and the misalignment of the transmitter coil and the induction coil will lead to problems of reduced charging efficiency and increased heat generation.

Therefore, it is necessary to improve the existing coil units to avoid the above-mentioned drawbacks.

【Content of utility model】

The purpose of the present invention is to provide a coil unit, a wireless charging system, a charger and an electrical equipment, which can avoid the problems of lowering of charging efficiency and increased heat generation caused by the dislocation of the transmitting coil and the induction coil.

The technical scheme of the present utility model is as follows:

A coil unit includes a coil and a positioning assembly, the coil is annular, at least one of the outer circumference and the inner circumference of the coil is provided with the positioning assembly, and the positioning assembly is formed by a plurality of permanent magnets along the The annular structure formed by the circumferential arrangement of the coils, each of the permanent magnets includes a first magnetic steel and a second magnetic steel arranged along the radial direction of the coils and in the shape of an arc, and a plurality of the first magnets A magnetic steel forms a circular first magnetic part, a plurality of the second magnetic steels form a circular second magnetic part, and the first magnetic steels are along the axial direction of the first magnetic part Magnetized, the second magnet is magnetized in a direction perpendicular to its chord.

Preferably, the positioning assembly has an adsorption surface, the coil unit is adsorbed with other coil units through the adsorption surface, and the polarity of the first magnetic steel on the adsorption surface is oriented toward the second magnetic steel The polarities of one side of the first magnet are the same.

Preferably, the side of the positioning assembly facing away from the adsorption surface is covered with a soft magnet, or/and the inner and outer peripheries of the positioning assembly are covered with a soft magnet.

Preferably, the width of the first magnetic steel in the radial direction thereof is d1, and the width of the second magnetic steel in the radial direction thereof is d2, and d1:d2=1:1.

Preferably, each of the permanent magnets further includes a third magnetic steel, the first magnetic steel is located between the second magnetic steel and the third magnetic steel, and a plurality of the third magnetic steels are formed in a circle The annular third magnetic part, wherein the magnetization direction of the third magnet steel is opposite to the magnetization direction of the second magnet steel.

Preferably, the width of the first magnetic steel in the radial direction is d1, the width of the second magnetic steel in the radial direction is d2, and the width of the third magnetic steel in the radial direction is d2. The width is d3, d1:d2:d3=2:1:1.

Preferably, two adjacent permanent magnets are arranged at intervals.

The present invention also provides a charger, which includes the coil unit described in any one of the above.

The utility model also provides an electrical equipment, the electrical equipment includes the coil unit described in any one of the above.

The present invention further provides a wireless charging system, the wireless charging system includes a receiving end and a transmitting end, and one of the receiving end and the transmitting end is the coil unit described in any one of the above.

Compared with the related art, the beneficial effects of the coil unit, wireless charging system, charger and electrical equipment provided by the present invention are: by setting the arrangement and magnetization direction of the permanent magnets, the magnetic attraction force and dislocation of the positioning assembly are improved. When the coil is used as the transmitting coil of the transmitting end or the induction coil of the receiving end, it is convenient to achieve precise positioning with the corresponding induction coil or transmitting coil, so as to avoid the reduction of charging efficiency caused by the misalignment of the transmitting coil and the induction coil. And the problem of increased heat generation to improve charging efficiency. At the same time, magnetizing the second magnetic steel in the direction perpendicular to its chord can greatly simplify the preparation process of the second magnetic steel, improve the molding yield and the magnetizing effect, and reduce the cost.

【Description of drawings】

1 is a schematic structural diagram of Embodiment 1 of a coil unit provided by the present invention;

FIG. 2 is a cross-sectional view of the coil unit shown in FIG. 1 along the A-A direction;

3 is a schematic structural diagram of a second magnetic steel in the coil unit shown in FIG. 1;

4 is a schematic structural diagram of a radially radiated arc-shaped magnetic steel;

5 is a schematic structural diagram of Embodiment 2 of the positioning assembly provided by the present invention;

6 is a schematic structural diagram of Embodiment 3 of the positioning assembly provided by the present invention;

7-12 are schematic diagrams of the matching structure of the positioning components of the transmitter and the receiver in the wireless charging system provided by the present invention.

【Detailed ways】

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, but not all of them. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The coil unit may be a transmitter applied to the charger or a receiver applied to an electrical device, wherein the transmitter and the receiver constitute a wireless charging system.

Example 1

Please refer to FIG. 1 to FIG. 4 , the coil unit includes a support member 1 , a coil 2 and a positioning component 3 disposed on the support member 1 . Wherein, when the coil unit is applied to the transmitter of the charger, the coil 2 is configured to transmit power to the induction coil of the receiver, and when the coil unit is applied to the receiver of the electrical equipment, the coil 2 is configured to transmit power from the transmitter Transmit coil received power.

The coil 2 is annular. As shown in FIG. 1 , the positioning assembly 3 is provided on the outer periphery of the coil 2 .

It can be understood that the positioning component 3 is not limited to being provided only on the outer circumference of the coil 2, for example, in other embodiments, the positioning component 3 may also be provided only on the inner circumference of the coil 2, Alternatively, the positioning components 3 are provided on both the outer circumference and the inner circumference of the coil 2 . In other words, the positioning member 3 is provided on at least one of the outer circumference and the inner circumference of the coil 2 .

The positioning assembly 3 is an annular structure composed of a plurality of permanent magnets 31 . By setting the positioning assembly 3 as a ring-shaped structure composed of a plurality of permanent magnets 31 , the eddy current loss during wireless charging can be reduced to reduce heat generation during charging, thereby improving charging efficiency.

In this embodiment, a plurality of the permanent magnets 31 are joined end to end to form an annular structure.

In this embodiment, each of the permanent magnets 31 includes a first magnetic steel 311 , a second magnetic steel 313 and a third magnetic steel 315 . The first magnetic steel 311 , the second magnetic steel 313 and the The third magnetic steels 315 are arranged along the radial direction of the coil 2 and are all arc-shaped. A plurality of the first magnetic steels 311 form an annular first magnetic portion 3A, and a plurality of the second magnetic steels 313 forms a second magnetic part 3B in the shape of an annular shape, and a plurality of the third magnetic steels 315 forms a third magnetic part 3C in the shape of an annular shape.

One of the outer circumference and the inner circumference of the first magnetic portion 3A is provided with the second magnetic portion 3B, and the other is provided with the third magnetic portion 3C. In other words, the first magnetic steel 311 is located between the second magnetic steel 313 and the third magnetic steel 315 (that is, the first magnetic part 3A is located between the second magnetic part 3B and the third magnetic steel 315 ). between the third magnetic parts 3C).

The first magnetic steel 311 is magnetized along the axial direction of the first magnetic portion 3A; the second magnetic steel 313 is magnetized along the direction perpendicular to its chord; the third magnetic steel 315 is magnetized along the vertical direction It is magnetized in the direction of its string, and the opposite sides of the third magnet 315 and the second magnet 313 have opposite polarities. In other words, the magnetization direction of the third magnet steel 315 is opposite to the magnetization direction of the second magnet steel 313 . By setting the arrangement and magnetization direction of the first magnet steel 311 , the second magnet steel 313 and the third magnet steel 315 , the magnetic attraction force and dislocation of the positioning assembly 3 are improved compared to the positioning assembly with a single magnetizing direction response time. Therefore, when the coil 2 is used as the transmitting coil of the transmitting end or the induction coil of the receiving end, it is convenient to achieve precise positioning with the corresponding induction coil or the transmitting coil, so that the charging efficiency caused by the misalignment of the transmitting coil and the induction coil can be avoided. Reduce and increase the problem of heat generation to improve charging efficiency. At the same time, the magnetization directions of the third magnetic steel 315 and the second magnet steel 313 (ie, the Y-axis direction shown in FIG. 3 ) have obvious advantages compared with the radial magnetization shown in FIG. 4 . Advantage. Specifically, the arc-shaped magnetic steel in Fig. 4 is magnetized along the radial direction Z, and the magnetic steel magnetized in the radial direction Z not only requires very high preparation process, but also is difficult to produce strict center-radial magnetic pole directions, especially sintered neodymium iron Boron forming is more difficult, resulting in high manufacturing cost. Therefore, using the magnetization directions of the third magnetic steel 315 and the second magnetic steel 313 of the present application can not only greatly simplify the preparation process, improve the yield of forming and the magnetization effect, and reduce the cost, and has better center alignment effect.

As shown in FIG. 2 and FIG. 3 , the magnetization direction of the first magnetic steel 311 is the X-axis direction; the magnetization direction of the second magnetic steel 313 is the Y-axis direction, which is perpendicular to the direction of the Y-axis in FIG. 3 . The dotted line, wherein the dotted line in FIG. 3 is the string of the second magnetic steel 313 .

In this embodiment, along the radial direction of the coil 2 , both the second magnetic steel 313 and the third magnetic portion 315 are in contact with the first magnetic portion 311 .

The width of the first magnetic steel 311 along its radial direction is d1, the width of the second magnetic steel 313 along its radial direction is d2, and the width of the third magnetic steel 315 along its radial direction is d2. The width is d3, wherein d1, d2 and d3 are not limited. In this embodiment, preferably, d1:d2:d3=2:1:1.

The positioning assembly 3 has an adsorption surface 33 , and the coil unit is adsorbed to other coil units through the adsorption surface 33 . As shown in the figure, the adsorption surface 33 is the surface of the positioning component 3 on the side facing away from the support member 1 . In this embodiment, the polarity of the first magnetic steel 311 on the adsorption surface 33 is the same as the polarity of the second magnetic steel 313 facing the side of the first magnetic steel 311 . Since the magnetization direction of the third magnet 315 is opposite to the magnetization direction of the second magnet 313 , the polarity of the first magnet 311 on the adsorption surface 33 is the same as that of the third magnet 313 . The polarity of the steel 315 facing the first magnetic steel 311 is the same. By setting the magnetic pole directions of the first magnetic steel 311 , the second magnetic steel 313 and the third magnetic steel 315 , the magnetic flux leakage on the back of the positioning assembly is greatly reduced (that is, the direction of the positioning assembly in the direction of The magnetic flux leakage on the side of the support member 1), forming a better shielding effect and improving the magnetism of the positioning assembly on the side of the adsorption surface 33, so that the magnetic attraction force of the positioning assembly and the restoring force during dislocation can be greatly improved To improve the positioning accuracy between the induction coil and the transmitter coil.

Exemplarily, the side of the first magnetic steel 311 facing the support member 1 is S-level, the side of the first magnetic steel 311 away from the support member 1 is N-pole, and the second magnetic steel 313 is facing the The side of the first magnet 311 is the N pole, the side of the second magnet 313 away from the first magnet 311 is the S pole, and the third magnet 315 faces the first magnet 311 The side of the third magnetic steel 315 away from the first magnetic steel 311 is the S pole.

In this embodiment, the side of the positioning component 3 away from the adsorption surface 33 and the inner and outer circumferences of the positioning component 3 are covered by a soft magnetic body 5 , wherein the soft magnetic body 5 may be a metal soft magnetic material or It is made of ferrite soft magnetic material, and the optional metal soft magnetic material includes electromagnetic pure iron, silicon steel sheet, iron-nickel alloy and iron-aluminum alloy. In this way, the magnetic field leaked by the positioning assembly 3 can be further shielded, and the magnetic attraction force can be improved. It can be understood that the arrangement of the soft magnet is not limited to this. For example, in other embodiments, the soft magnet may only cover the side of the positioning assembly 3 away from the adsorption surface 33, or the soft magnet may only cover the Describe the inner and outer circumferences of the positioning assembly 3.

As shown in FIGS. 1 and 2 , the soft magnetic body 5 covering the side of the positioning assembly 3 facing the support member 1 is provided between the support member 1 and the positioning assembly 3 . It can be understood that, in other embodiments, the support member may be set as a soft magnetic body, and the support member covers the side of the positioning assembly away from the adsorption surface.

Embodiment 2

Referring to FIG. 5 , the difference between the second implementation and the first implementation is only that the two adjacent permanent magnets 31 ′ are arranged at intervals. Wherein, the gap between two adjacent permanent magnets 31 ′ can be used for the connecting wire of the coil to extend to the outside of the positioning assembly 3 .

In this embodiment, a plurality of the permanent magnets 31 ′ are arranged at equal intervals.

Embodiment 3

Please refer to FIG. 6 , the only difference between the third embodiment and the first embodiment is that the permanent magnet 31 ″ only includes a first magnetic steel 311 ″ and a second magnetic steel 313 ″, and a plurality of the first magnetic steel 311 ″ are composed of The annular first magnetic portion 3A", and a plurality of the second magnetic steels 313" form the annular second magnetic portion 3B", and the second magnetic portion 3B" can be arranged on the first The outer periphery of the magnetic portion 3A" may be provided on the inner periphery of the first magnetic portion 3A".

As shown in FIG. 6 , the first magnetic steel 311" and the second magnetic steel 313" are in contact with each other.

In this embodiment, d1:d2=1:1.

The utility model also provides a charger, which includes the above-mentioned coil unit.

The utility model also provides an electrical equipment, the electrical equipment includes the above-mentioned coil unit. Wherein, the support member may be the back shell of the electrical equipment.

The present invention also provides a wireless charging system, the wireless charging system includes a receiving end and a transmitting end, and one of the receiving end and the transmitting end is the above-mentioned coil unit. As shown in Figures 7-12, when one of the receiving end and the transmitting end is the coil unit described above, the positioning components of the receiving end and the transmitting end have various matching methods, so that higher Compatibility, it should be noted that Figure 7-12 only shows part of the matching method.

The beneficial effects of the coil unit, the wireless charging system, the charger and the electrical equipment provided by the utility model are: by setting the arrangement and magnetization direction of the permanent magnets, the magnetic attraction force of the positioning component and the restoring force during dislocation are improved. When the coil is used as the transmitter coil of the transmitter end or the induction coil of the receiver end, it is convenient to achieve precise positioning with the corresponding induction coil or transmitter coil, so as to avoid the problem of reduced charging efficiency and increased heat caused by the misalignment of the transmitter coil and the induction coil. to improve charging efficiency. At the same time, magnetizing the second magnetic steel in the direction perpendicular to its chord can greatly simplify the preparation process of the second magnetic steel, improve the molding yield and the magnetizing effect, and reduce the cost.

The above are only the embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these belong to The scope of protection of the utility model.

Claims (10)

1. A coil unit, comprising a coil and a positioning assembly, the coil is annular, and characterized in that: at least one of the outer circumference and the inner circumference of the coil is provided with the positioning assembly, and the positioning assembly is an annular structure composed of a plurality of permanent magnets arranged along the circumferential direction of the coil, each of the permanent magnets includes a first magnetic steel and a second magnetic steel arranged along the radial direction of the coil and in the shape of an arc , a plurality of the first magnetic steels form a circular first magnetic part, a plurality of the second magnetic steels form a circular second magnetic part, and the first magnetic steels The magnetic part is magnetized in the axial direction, and the second magnet is magnetized in a direction perpendicular to its chord. 2 . The coil unit according to claim 1 , wherein the positioning component has an adsorption surface, the coil unit is adsorbed with other coil units through the adsorption surface, and the first magnetic steel is in the adsorption surface. 3 . The polarity on the face is the same as the polarity on the side of the second magnet facing the first magnet. 3 . The coil unit according to claim 2 , wherein the side of the positioning assembly facing away from the adsorption surface is covered by a soft magnet, or/and the inner and outer peripheries of the positioning assembly are covered by a soft magnet. 4 . 4 . The coil unit according to claim 1 , wherein the width of the first magnetic steel along its radial direction is d1 , the width of the second magnetic steel along its radial direction is d2 , 4 . d1:d2=1:1. 5 . The coil unit according to claim 1 , wherein each of the permanent magnets further comprises a third magnetic steel, and the first magnetic steel is located between the second magnetic steel and the second magnetic steel. 6 . Between the third magnetic steels, a plurality of the third magnetic steels form a circular third magnetic part, wherein the magnetization direction of the third magnet steel is the same as the magnetization direction of the second magnet steel on the contrary. 6 . The coil unit according to claim 5 , wherein the width of the first magnetic steel in the radial direction is d1 , the width of the second magnetic steel in the radial direction is d2 , The width of the third magnet along its radial direction is d3, d1:d2:d3=2:1:1. 7 . The coil unit according to claim 1 , wherein two adjacent permanent magnets are arranged at intervals. 8 . 8. A charger, characterized by comprising the coil unit according to any one of claims 1-7. 9. An electrical device, characterized in that it comprises the coil unit according to any one of claims 1-7. 10. A wireless charging system, comprising a receiving end and a transmitting end, wherein one of the receiving end and the transmitting end is the coil unit according to any one of claims 1-7.

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