High-integration inductor row and electronic equipment

Abstract

The utility model provides a high-integration inductor row and electronic equipment. The high-integration inductor row comprises at least two coils, wherein an accommodating area is arranged in each coil; each electromagnetic partition plate is arranged between any two adjacent coils and is used for isolating electromagnetic interference between the two adjacent coils; the magnet is integrally formed, the coils and the electromagnetic partition plates are wrapped in the magnet, and the magnet further extends to gaps between the containing area and wires of the coils; and the two wire ends of each coil are respectively connected with two external terminals, and each external terminal extends out of the magnet. On the basis, the integration efficiency of the inductor row can be improved, the heat dissipation performance is good, and leakage flux is small.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic components, and in particular to a highly integrated inductor array and electronic equipment. Background Art

[0002] With the rapid development of technology, there are more and more electronic devices, and their size is getting smaller and smaller. Therefore, more and more electronic components need to be accommodated in the same space. In order to meet this demand, the current industry will make corresponding scientific and reasonable adjustments to the wiring of PCB (Printed Circuit Board), and then put forward relevant requirements for inductor integration, so inductor banks have been developed. The so-called inductor bank refers to multiple coils arranged side by side in a magnet. The existing inductor bank is only a simple combination of multiple individual inductors. Each inductor arranged in the outermost magnet still has its own magnetic shell, which not only causes the final inductor bank to still have a large volume and the integration efficiency of the inductor bank is not high, but also there is a problem of poor heat conduction between the coil and the outermost magnet. The heat generated by the coil is difficult to dissipate quickly through the surface of the magnet. The magnetic shell is generally a prefabricated part, which causes the coil to be incompletely enclosed by the magnetic shell and the leakage magnetic field is large. Utility Model Content

[0003] In view of this, the present application provides a highly integrated inductor bank and electronic equipment, which can improve the problems of low integration efficiency, poor heat dissipation and large magnetic leakage of existing inductor banks.

[0004] The present application provides a highly integrated inductor bank, comprising:

[0005] At least two coils are arranged in sequence along a first direction, and each coil has a receiving area;

[0006] At least one electromagnetic partition, wherein a single electromagnetic partition is provided between any two adjacent coils to isolate electromagnetic interference between the two adjacent coils;

[0007] An integrally formed magnet, wherein the at least two coils and the electromagnetic partition are wrapped within the magnet, and the magnet also extends to the gap between the receiving area and the wires of the coils;

[0008] A plurality of external terminals are provided, wherein two wire ends of each coil are respectively connected to two of the external terminals, and each of the external terminals extends outside the magnet.

[0009] Optionally, the multiple electromagnetic baffles are arranged in parallel, and the first direction is perpendicular to the multiple electromagnetic baffles.

[0010] Optionally, along the first direction, the orthographic projections of the accommodating areas of the at least two coils overlap.

[0011] Optionally, the cross-sectional area of ​​the magnet along the first direction perpendicular to the first direction is S0, the orthographic projection area of ​​the electromagnetic partition along the first direction is S1, the coil area of ​​the coil is S2, and the following conditions are satisfied: 0.5*S2≤S1≤0.9*S0.

[0012] Optionally, the magnetic permeability of the electromagnetic partition is μ1, the magnetic permeability of the magnet is μ0, and μ1<0.5*μ0.

[0013] Optionally, the electromagnetic partition is circular.

[0014] Optionally, the magnet includes a first surface, a second surface, a third surface, and a fourth surface connected end to end in sequence, the second surface and the fourth surface are arranged opposite to each other along a second direction, the first surface and the third surface are arranged opposite to each other along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other;

[0015] The two wire ends of each coil extend toward the second surface. For the two external terminals connected to the same coil, one external terminal extends out of the magnet through the second surface and extends through the second surface to mate with the first surface, and the other external terminal extends out of the magnet through the second surface and extends through the second surface to mate with the third surface.

[0016] Optionally, the magnet is provided with recessed areas on the first surface and the third surface, the junction of the recessed areas and the second surface is convex to form an inclined surface, and the external terminal is attached to the inclined surface.

[0017] Optionally, at least a portion of the external terminal that is in contact with the inclined surface protrudes from the corresponding surface, or is flush with the corresponding surface.

[0018] Optionally, the external terminal affixed to the inclined surface is higher than the lowest point of the coil.

[0019] The present application provides an electronic device, comprising a circuit board and the highly integrated inductor bank as described in any one of the above items, wherein the highly integrated inductor bank is connected to the circuit board.

[0020] As described above, in the highly integrated inductor bank and electronic device of the present application, multiple coils are wrapped in a magnet, and an electromagnetic partition is provided between any two adjacent coils to isolate the electromagnetic interference between the two adjacent coils. The magnet also extends to the coil accommodation area and the gap between the coil wires. Compared with the existing inductor bank, the present application uses an integrally formed magnet to replace the magnets of each coil, and there is no need to provide a separate magnetic shell for each coil, so that the inductor bank has a higher integration efficiency and reduces the volume of the inductor bank. At the same time, the magnet is in close contact with each coil, and the heat conduction between the coil and the magnet is good. The heat generated by the coil can be quickly dissipated through the surface of the magnet, and the heat dissipation is good. In addition, each coil is completely wrapped and enclosed by the magnet, which can greatly reduce the leakage magnetic flux of the entire inductor bank. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 and Figure 2 3D diagrams of the structure of a highly integrated inductor bank according to an embodiment of the present application from two perspectives;

[0022] Figure 3 yes Figure 1 Schematic diagram of the relative structure of the coil and electromagnetic partition of the highly integrated inductor row shown;

[0023] Figure 4 yes Figure 1 The cross-sectional view of the highly integrated inductor array along the AA direction is shown.

[0024] First direction x, second direction y, third direction z;

[0025] Magnet 1, first surface 101, second surface 102, third surface 103, fourth surface 104, fifth surface 105, sixth surface 106, recessed area 11, inclined surface 111;

[0026] Coil 2, accommodating area 20;

[0027] External terminal 3;

[0028] Electromagnetic partition 4. DETAILED DESCRIPTION

[0029] In the highly integrated inductor array of the present application, multiple coils are enclosed in a magnet, and an electromagnetic partition is provided between any two adjacent coils to isolate electromagnetic interference between the two adjacent coils. Each coil, the adjacent electromagnetic partition, and the encapsulating magnet form a respective inductor. The magnet also extends to the coil accommodation area and the gap between the coil wires. Compared to existing inductor arrays, the present application replaces the magnets of each coil with an integrally formed magnet, eliminating the need for a separate magnetic shell for each coil. This allows the inductor array to have a higher integration efficiency. At the same time, the magnet is in close contact with each coil, resulting in better heat conduction between the coil and the magnet, and each coil is enclosed by the magnet, resulting in less magnetic leakage.

[0030] The specific forms of the parameters such as the shape, quantity, and size of the magnets, coils, electromagnetic partitions, and external terminals can be determined according to the actual application and the required adaptability of the configuration, and this application does not limit them.

[0031] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly described below in conjunction with specific embodiments and corresponding drawings. Obviously, the embodiments described below are only some of the embodiments of this application, not all of them. Unless there is a conflict, the following embodiments and their technical features can be combined with each other and also belong to the technical solutions of this application.

[0032] Please also refer to Figures 1 to 4 A highly integrated inductor bank (hereinafter referred to as "inductor bank") according to one embodiment of the present application includes a magnet 1, at least two coils 2, at least two external terminals 3, and at least one electromagnetic barrier 4. The figure uses four coils 2, eight external terminals 3, and three electromagnetic barriers 4 as an example for illustration and description, but it should be understood that this does not limit the scope of protection.

[0033] For ease of description and understanding, in conjunction with the placement orientation shown in the figure, the length direction of the inductor array will be referred to as the first direction x, the height direction as the second direction y, and the width direction as the third direction z. The first direction x, the second direction y, and the third direction z are perpendicular to each other and can be regarded as the three coordinate axes of a three-dimensional rectangular coordinate system. It should be understood that the term "perpendicular" throughout this application does not require that the angle between the two must be 90°, but rather allows for a deviation of, for example, ±10°. That is, the term "perpendicular" can be understood as meaning that the angle between any two directions is 80° to 100°. Similarly, the term "parallel" throughout this application does not require that the angle between the two must be 0° or 180°, but rather allows for a deviation of, for example, ±10°. That is, the term "parallel" can be understood as meaning that the angle between any two directions is 0° to 10° or 170° to 190°.

[0034] All coils 2 are arranged in sequence along the first direction x. The structures of the coils 2 may be completely the same or different. This article takes the same coils 2 as an example for demonstration and description.

[0035] In one example, the coil 2 can be formed by winding a wire (such as a copper enameled wire, or a strip conductor, or a long sheet conductor) around a accommodating area 20 in circles. The accommodating area 20 can be regarded as a cavity where the inner turn of the coil 2 is located, and can be the area to which the axis extends during winding. The thickness of each coil 2 (i.e., the length along the second direction y, also known as the "height") can be defined by the diameter of the wire (or the width of the conductor) and the number of turns. For the coil 2 in a standing state, the two ends of the wire or conductor serve as the two wire ends of the coil 2 that are arranged opposite to each other along the third direction z. The two wire ends are both located below the coil 2 and are arranged opposite to each other on the left and right.

[0036] The two external terminals 3 are respectively connected to two opposite wire ends of the coil 2 .

[0037] A single electromagnetic partition 4 is provided between any two adjacent coils 2 to isolate the electromagnetic interference between the two adjacent coils 2. The material of the electromagnetic partition 4 is adaptable and is not limited by this application. Figure 3 The circle shown can of course also be a polygon of other shapes to adapt to the coil 2 with a circular cross section as a whole.

[0038] The minimum distance between two adjacent coils 2 (i.e., along the first direction x) can be slightly larger than the thickness of a single electromagnetic partition 4, that is, the opposite sides of each electromagnetic partition 4 are not in contact with the two adjacent coils 2, but are provided with a "magnetic wall" formed by magnetic material. Here, while the opposite sides of each electromagnetic partition 4 are tightly fitted with the two adjacent coils 2, the magnetic material of the magnet 1 also extends between the electromagnetic partition 4 and the adjacent coil 2, thereby forming a closed magnetic circuit for a single inductor.

[0039] All electromagnetic baffles 4 are arranged in parallel, and the first direction x is perpendicular to these electromagnetic baffles 4. Along the first direction x, the orthographic projections of the accommodating areas 20 of these coils 2 can overlap. In this way, all coils 2 and all electromagnetic baffles 4 of the present application can be arranged more closely.

[0040] The magnet 1 is an integrally formed structural member, for example, formed by injection molding and curing of an adaptable flowable magnetic material. All coils 2 and all electromagnetic partitions 4 are enclosed within the magnet 1, and the magnet 1 extends into and fills the accommodation area 20 of each coil 2. The magnet 1 also extends into the gaps between the wires (or conductors) of each coil 2, thereby ensuring close contact between the magnet 1 and each coil 2, completely enclosing and enclosing each coil 2.

[0041] Each external terminal 3 extends out of the magnetic body 1 .

[0042] exist Figure 1 and Figure 2 In the example shown, the magnet 1 includes a first surface 101, a second surface 102, a third surface 103, and a fourth surface 104 connected end to end. The second surface 102 and the fourth surface 104 are arranged opposite to each other along the second direction y, and the first surface 101 and the third surface 103 are arranged opposite to each other along the third direction z. Of course, the magnet 1 also includes a fifth surface 105 and a sixth surface 106. The fifth surface 105 and the sixth surface 106 are arranged opposite to each other along the first direction x. The first surface 101, the second surface 102, the third surface 103, and the fourth surface 104 are connected between the fifth surface 105 and the sixth surface 106. That is, the fourth surface 104 can be regarded as the upper surface of the magnet 1, the second surface 102 can be regarded as the lower surface of the magnet 1, the first surface 101 can be regarded as the left side of the magnet 1, the third surface 103 can be regarded as the right side of the magnet 1, the fifth surface 105 can be regarded as the front surface of the magnet 1, and the sixth surface 106 can be regarded as the back surface of the magnet 1.

[0043] The two wire ends of each coil 2 can extend toward the second surface 102. For the two external terminals 3 connected to the same coil 2, one external terminal 3 extends out of the magnet 1 through the second surface 102 and extends through the second surface 102 to mate with the first surface 101, and the other external terminal 3 extends out of the magnet 1 through the second surface 102 and extends through the second surface 102 to mate with the third surface 103. Figure 1 、 Figure 2 and Figure 3 In the illustrated scenario, the two external terminals 3 extend out of the magnet 1 and then adhere to the second surface 102 , and extend to the first surface 101 and then adhere to the first surface 101 .

[0044] Here, the portion of the single external terminal 3 located on the second surface 102 can be used as a patch electrode for SMT (Surface Mounted Technology) mounting on a circuit board such as a PCB, and the portion of the single external terminal 3 located on the first surface 101 (or on the third surface 103) can be used as a side electrode.

[0045] In the inductor bank of the present application, each coil 2 forms an inductor with the adjacent electromagnetic partition 4, the two external terminals 3 connected thereto, and the magnet 1 for wrapping. Compared with the existing inductor bank, the present application replaces the magnets for each coil 2 with an integrally formed magnet 1, and there is no need to provide a separate magnetic shell for each coil 2. This makes the inductor bank have a higher integration efficiency and can reduce the volume of the entire inductor bank. At the same time, the magnet 1 is in close contact with each coil 2, and the heat conduction between the coil 2 and the magnet 1 is good. The heat generated by the coil 2 can be quickly dissipated through the surface of the magnet 1, which has good heat dissipation. In addition, each coil 2 is completely wrapped and sealed by the magnet 1, which can greatly reduce the leakage magnetic flux of the entire inductor bank.

[0046] In one example, the cross-sectional area of ​​the magnet 1 perpendicular to the first direction x (i.e., the area of ​​the yz cross section) is S0, the orthographic projection area of ​​the electromagnetic partition 4 along the first direction x is S1, and the coil area of ​​the coil 2 (i.e., the area of ​​the yz cross section) is S2, and the following conditions are satisfied: 0.5*S2≤S1≤0.9*S0. In this way, the electromagnetic partition 4 can not only effectively isolate electromagnetic interference between two adjacent coils 2, but also reduce the cross-sectional area of ​​the magnet 1, further improving integration efficiency.

[0047] In one example, the magnetic permeability of the electromagnetic partition 4 is μ1, the magnetic permeability of the magnet 1 is μ0, and the following relationship is satisfied: μ1<0.5*μ0, so that the electromagnetic partition 4 has a good electromagnetic isolation effect.

[0048] In traditional inductor array designs, the bend of the external terminal has a rounded transition and the side electrode is arranged perpendicular to the patch electrode, resulting in a gap between the bend and the surface to be mounted, such as the circuit board. When soldering the patch electrode, the solder needs to fill the gap first, which can easily result in the solder not being exposed or rarely exposed on the side electrode. When using AOI (Automated Optical Inspection) technology, it is difficult to capture the solder image in a direction parallel to the side electrode, resulting in detection failure, thereby giving a result of unqualified welding quality, affecting the effective monitoring of SMT quality.

[0049] To solve this technical problem, in one example of the present application, the bottom of the magnet 1 can be designed with a recessed structure. Please continue to refer to Figures 1 to 4 As shown, the magnet 1 may be provided with a recessed area 11 on the first surface 101 and the third surface 103 . The junction between the recessed area 11 and the second surface 102 is convex to form an inclined surface 111 , and the external terminal 3 is attached to the inclined surface 111 .

[0050] In one example, at least a portion of the external terminal 3, i.e., the side electrode, that is, affixed to the inclined surface 111 protrudes from the corresponding surface. That is, at least a portion of the side electrode of the left external terminal 3 protrudes from the first surface 101 of the magnet 1, and at least a portion of the side electrode of the right external terminal 3 protrudes from the third surface 103 of the magnet 1. In other examples, for any external terminal 3, at least a portion of its side electrode can be flush with the corresponding surface.

[0051] After the patch electrodes are soldered to perform SMT mounting, the solder during soldering will form a tin creep phenomenon, that is, the solder will overflow toward the side electrodes and adhere to the outer surface of the side electrodes. Here, the solder will be exposed to the side electrodes of each external terminal 3. When using AOI technology, the solder image can be collected in the direction perpendicular to the patch electrode (the opposite direction of the second direction y, or the direction of gravity), and this can be used to determine whether the welding quality is qualified, thereby achieving effective monitoring of SMT quality.

[0052] Optionally, in the second direction y, the side electrodes of each external terminal 3 can be higher than the lowest point of the coil 2, so that the side electrodes of each external terminal 3 have sufficient length, which is conducive to improving the fitting effect between the side electrodes and the corresponding inclined surface 111, and avoiding the side electrodes from warping outward and blocking the solder image in the opposite direction of the second direction y.

[0053] An embodiment of the present application further provides an electronic device comprising a circuit board and a highly integrated inductor bank as described in any of the above examples, wherein the highly integrated inductor bank is connected to the circuit board. The electronic device has the beneficial effects produced by the highly integrated inductor bank described in any of the above examples.

[0054] The circuit board includes but is not limited to a PCB board. The specific form of the electronic device is not limited in this application. For example, it can be an on-board electrical device.

[0055] The above descriptions are only some embodiments of the present application and do not limit the patent scope of the present application. For ordinary technicians in this field, any equivalent structural changes made using the contents of this specification and drawings are also included in the patent protection scope of the present application.

[0056] In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of the corresponding embodiments, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be understood as a limitation on the present application.

[0057] Although the terms "first," "second," and the like are used herein to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. In addition, the singular forms "a," "an," and "the" are intended to include the plural forms as well. The terms "or" and "and / or" are to be interpreted as inclusive, meaning any one or any combination. Exceptions to this definition occur only when a combination of elements, functions, steps, or operations is inherently mutually exclusive in some manner.

Claims

1. A highly integrated inductor bank, characterized in that: include: At least two coils are arranged in sequence along a first direction, and each coil has a receiving area; At least one electromagnetic partition, wherein a single electromagnetic partition is provided between any two adjacent coils to isolate electromagnetic interference between the two adjacent coils; An integrally formed magnet, wherein the at least two coils and the electromagnetic partition are wrapped within the magnet, and the magnet also extends to the gap between the receiving area and the wires of the coils; A plurality of external terminals are provided, wherein two wire ends of each coil are respectively connected to two of the external terminals, and each of the external terminals extends outside the magnet.

2. The highly integrated inductor bank according to claim 1, characterized in that: The multiple electromagnetic baffles are arranged in parallel, and the first direction is perpendicular to the multiple electromagnetic baffles.

3. The highly integrated inductor bank according to claim 2, characterized in that: Along the first direction, orthographic projections of the accommodation areas of the at least two coils overlap.

4. The highly integrated inductor bank according to claim 3, characterized in that: The cross-sectional area of ​​the magnet along the first direction perpendicular to the first direction is S0, the orthographic projection area of ​​the electromagnetic partition along the first direction is S1, the coil area of ​​the coil is S2, and the following conditions are satisfied: 0.5*S2≤S1≤0.9*S0.

5. The highly integrated inductor bank according to any one of claims 1 to 4, characterized in that: The magnetic permeability of the electromagnetic partition is μ1, the magnetic permeability of the magnet is μ0, and the following conditions are satisfied: μ1<0.5*μ0.

6. The highly integrated inductor bank according to any one of claims 1 to 4, characterized in that: The magnet includes a first surface, a second surface, a third surface, and a fourth surface connected end to end, the second surface and the fourth surface are arranged opposite to each other along a second direction, the first surface and the third surface are arranged opposite to each other along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other; The two wire ends of each coil extend toward the second surface. For the two external terminals connected to the same coil, one external terminal extends out of the magnet through the second surface and extends through the second surface to mate with the first surface, and the other external terminal extends out of the magnet through the second surface and extends through the second surface to mate with the third surface.

7. The highly integrated inductor bank according to claim 6, characterized in that: The magnet is provided with recessed areas on the first surface and the third surface. The junction of the recessed areas and the second surface is convex to form an inclined surface, and the external terminal is attached to the inclined surface.

8. The inductor bank according to claim 7, characterized in that: At least a portion of the external connection terminal that is in contact with the inclined surface protrudes from the corresponding surface or is flush with the corresponding surface.

9. The highly integrated inductor bank according to claim 7, characterized in that: The external terminal attached to the inclined surface is higher than the lowest point of the coil.

10. An electronic device, characterized in that: The invention comprises a circuit board and the highly integrated inductor bank according to any one of claims 1 to 9, wherein the highly integrated inductor bank is connected to the circuit board.

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