Magnetic device, circuit board assembly and power conversion equipment

Abstract

The utility model discloses a magnetic device, a circuit board assembly and power conversion equipment, the magnetic device comprises a magnetic device main body, a wiring terminal and a flexible connecting piece, the flexible connecting piece is electrically connected with the magnetic device main body and the wiring terminal, and the wiring terminal is used for being electrically connected with a circuit board. Under the condition that the connection position of the wiring terminal and the circuit board deviates due to installation errors, the position of the wiring terminal can be adjusted by using the flexible connecting piece, so that the deviation is reduced, the stress generated by the installation errors is reduced, and the flexible connecting piece can deform and can release the stress generated by the installation errors, so that the reliability of the wiring terminal is improved. And the reliability of electrical connection of the magnetic device is effectively improved.

Description

Magnetic devices, circuit board assemblies and power conversion equipment Technical Field

[0001] This application relates to the field of magnetic device technology, and more specifically, to a magnetic device, circuit board assembly, and power conversion device. Background Technology

[0002] Magnetic components are electrically connected to a circuit board. Stress arises from installation errors in the connection between the magnetic components and the circuit board, and this stress concentration leads to poor reliability of the electrical connection.

[0003] In conclusion, improving the reliability of electrical connections in magnetic devices is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a magnetic device, a circuit board assembly, and a power conversion device to improve the reliability of the electrical connection of the magnetic device.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A magnetic device includes: a magnetic device body, terminals, and a flexible connector, wherein the flexible connector electrically connects the magnetic device body and the terminals, and the terminals are used for electrical connection with a circuit board.

[0007] In some embodiments, the magnetic device further includes a bracket that supports the terminal block.

[0008] In some embodiments, the magnetic device and the circuit board are distributed along a first direction; the bracket is provided with a limiting portion, and the terminal block and the limiting portion are clearance-fitted in a second direction and a third direction; wherein, the first direction is the thickness direction of the circuit board, and the first direction, the second direction and the third direction are perpendicular to each other.

[0009] In some embodiments, the limiting portion includes a limiting hole, the axial direction of the limiting hole is a first direction, the terminal is provided with a limiting member, and the limiting member is located in the limiting hole; in a second direction, there is a first gap between the limiting member and the limiting hole; in a third direction, there is a second gap between the limiting member and the limiting hole.

[0010] In some embodiments, the terminal block is used to be fixedly connected to the circuit board via a threaded connector, and the bracket is provided with a nut that mates with the threaded connector; the conductive layer of the circuit board and the terminal block are in contact and electrically connected.

[0011] In some embodiments, the nut is a floating nut.

[0012] In some embodiments, the terminal block is used for electrical connection with the circuit board, and the limiting member is connected to the terminal block;

[0013] The limiting member is connected to at least one side of the connector in a third direction;

[0014] And / or, the limiting member is connected to at least one side of the terminal block along the second direction.

[0015] In some embodiments, the terminal block further includes a terminal block connection portion, which connects the terminal piece and the flexible connector;

[0016] Wherein, when the limiting member is connected to at least one side of the terminal block in a third direction, the terminal connection portion is connected to one side of the terminal block in a second direction;

[0017] When the limiting member is connected to at least one side of the terminal block along the second direction, the terminal connection portion is connected to one side of the terminal block along the third direction;

[0018] When the limiting member is connected to one side of the terminal block in a third direction, the terminal connection part is connected to the other side of the terminal block in a third direction;

[0019] When the limiting member is connected to one side of the terminal block along the second direction, the terminal connection portion is connected to the other side of the terminal block along the second direction.

[0020] In some embodiments, the support is an insulating support.

[0021] In some embodiments, the flexible connector includes at least one of copper braided tape, flexible wire, and flexible copper busbar.

[0022] Based on the magnetic devices provided above, this application also provides a circuit board assembly, which includes: a circuit board and the magnetic devices described in any of the above claims.

[0023] Based on the circuit board assembly provided above, this application also provides a power conversion device, which includes the circuit board assembly described above.

[0024] In the magnetic device provided in this application, a flexible connector electrically connects the main body of the magnetic device and the terminal block. The terminal block is used for electrical connection with the circuit board. In this way, if the connection position between the terminal block and the circuit board deviates due to installation errors, the position of the terminal block can be adjusted using the flexible connector, thereby reducing the deviation and the stress caused by the installation error. Moreover, the flexible connector itself can deform to release the stress caused by the installation error, effectively improving the reliability of the electrical connection of the magnetic device. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 is a schematic diagram of the connection between the magnetic device and the circuit board provided in an embodiment of this application;

[0027] Figure 2 is an exploded view of the structure shown in Figure 1;

[0028] Figure 3 is a front view of the structure shown in Figure 1;

[0029] Figure 4 is a schematic diagram of the structure of the magnetic device provided in the embodiment of this application;

[0030] Figure 5 is an enlarged structural diagram of part A in Figure 4;

[0031] Figure 6 is a partial structural schematic diagram of the magnetic device provided in an embodiment of this application;

[0032] Figure 7 is a top view of the magnetic device provided in an embodiment of this application;

[0033] Figure 8 is an enlarged structural diagram of part B in Figure 7;

[0034] Figure 9 is a cross-sectional view along the CC direction of Figure 7;

[0035] Figure 10 is an enlarged structural diagram of part D in Figure 9.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1 is a magnetic device, 2 is a circuit board, 21 is a second mounting hole, 22 is a conductive layer, 3 is a fastener, and 3a is a threaded connector;

[0038] 11-Main body of magnetic device, 111-Coil, 12-Terminal, 121-Connecting piece, 1211-First mounting hole, 122-Limiting member, 123-Terminal connection part, 13-Flexible connector, 14-Bracket, 141-Limiting part, 141a-Limiting hole, 15-Housing shell, 16-Nut;

[0039] 01 is the first gap, 02 is the second gap. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the embodiments of this application, “one or more” means one, two, or more; “and / or” describes the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character “ / ” generally indicates that the preceding and following related objects are in an “or” relationship.

[0042] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0043] The "multiple" mentioned in the embodiments of this application refers to two or more. It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0044] The terms "parallel" and "perpendicular" used in this application refer to "basically parallel" and "basically perpendicular" in practical operation. "Basically parallel" can be understood as parallelism with a certain degree of error, and similarly, "basically perpendicular" can be understood as perpendicularity with a certain degree of error.

[0045] This application provides a magnetic device, a circuit board assembly, and a power conversion device to improve the reliability of the electrical connections of the magnetic device.

[0046] As shown in Figure 1, the circuit board assembly provided in this embodiment includes: a magnetic device 1 and a circuit board 2.

[0047] Magnetic device 1 mainly includes windings and a magnetic core, and is mainly used for energy storage, energy conversion, and electrical isolation. Magnetic device 1 includes at least one of a transformer and an inductor.

[0048] There can be one or more magnetic devices 1. When there are two or more magnetic devices 1, the types of magnetic devices 1 can be the same, for example, all magnetic devices 1 can be transformers or inductors; the types of magnetic devices 1 can also be different, for example, at least one magnetic device 1 is a transformer and at least one magnetic device 1 is an inductor.

[0049] The circuit board 2 can be a PCB (Printed Circuit Board) or other types, and this application embodiment does not limit this.

[0050] In this embodiment, the magnetic device 1 and the circuit board 2 are electrically connected. The magnetic device 1 and the circuit board 2 are distributed along a first direction, which is perpendicular to the circuit board 2.

[0051] As shown in Figure 2, the magnetic device 1 includes: a magnetic device body 11, a terminal block 12, and a flexible connector 13.

[0052] The main body 11 of the magnetic device includes a winding and a magnetic core, and the winding includes a coil.

[0053] The flexible connector 13 is flexible, which can be understood as: the flexible connector 13 can deform, for example, the flexible connector 13 can be bent, twisted and folded and other forms of deformation.

[0054] The flexible connector 13 includes a copper braided strip, a flexible wire, or a flexible copper busbar. Of course, the flexible connector 13 can be selected to include at least two of the following: copper braided strip, flexible wire, and flexible copper busbar. This application does not limit the type of flexible connector 13.

[0055] The flexible connector 13 electrically connects the magnetic device body 11 and the terminal block 12. Specifically, one end of the flexible connector 13 is electrically connected to the magnetic device body 11, for example, one end of the flexible connector 13 is electrically connected to the coil of the magnetic device body 11. To facilitate electrical connection, the flexible connector 13 can be electrically connected to the magnetic device body 11 by means of welding or crimping.

[0056] The other end of the flexible connector 13 is electrically connected to the terminal block 12. For ease of electrical connection, the flexible connector 13 can be electrically connected to the terminal block 12 by means of welding or crimping.

[0057] Terminal 12 is used for electrical connection with circuit board 2. For example, as shown in FIG3, the conductive layer 22 of circuit board 2 contacts and is electrically connected to terminal 12. To improve the reliability of the electrical connection between terminal 12 and circuit board 2, terminal 12 is used for fixed connection with circuit board 2 by fastener 3. For example, fastener 3 is a threaded connector 3a, a retaining pin, or other fastener. Specifically, as shown in FIG2, terminal 12 is provided with a first mounting hole 1211, circuit board 2 is provided with a second mounting hole 21, and fastener 3 passes through the second mounting hole 21 and is located in the first mounting hole 1211, or fastener 3 passes through the second mounting hole 21 and the first mounting hole 1211.

[0058] As mentioned above, the flexible connector 13 is deformable. Therefore, the position of the end of the flexible connector 13 electrically connected to the terminal 12 in the first direction can be adjusted by the deformation of the flexible connector 13. The position of the end of the flexible connector 13 electrically connected to the terminal 12 on the first plane can also be adjusted by the deformation of the flexible connector 13. The first plane is perpendicular to the first direction, which is the thickness direction of the circuit board 2. This can be understood as: the first direction is perpendicular to the plane containing the circuit board 2, and the first plane is parallel to the plane containing the circuit board 2. For example, as shown in Figure 5, both the second direction and the third direction are perpendicular to the first direction, and both are parallel to the first plane. The position of the end of the flexible connector 13 electrically connected to the terminal 12 on the first plane can be adjusted by the deformation of the flexible connector 13. This can be understood as: the position of the end of the flexible connector 13 electrically connected to the terminal 12 in the second direction can be adjusted by the deformation of the flexible connector 13, and the position of the end of the flexible connector 13 electrically connected to the terminal 12 in the third direction can also be adjusted by the deformation of the flexible connector 13. In this way, the position of the terminal block 12 in the first direction can be adjusted, and the position of the terminal block 12 on the first plane can be adjusted.

[0059] In this embodiment, the flexible connector 13 electrically connects the magnetic device body 11 and the terminal block 12, and the terminal block 12 is electrically connected to the circuit board 2. In this way, if the connection position of the terminal block 12 and the circuit board 2 deviates due to installation error, the position of the terminal block 12 can be adjusted by using the flexible connector 13, reducing the deviation and thus reducing the stress caused by the installation error. Moreover, the flexible connector 13 itself can deform to release the stress caused by the installation error, effectively improving the reliability of the electrical connection of the magnetic device.

[0060] The magnetic device 1 provided in this application embodiment can reduce the stress caused by installation errors and release the stress caused by installation errors. The cross-section of the flexible connector 13 can be appropriately increased so that the flexible connector 13 can carry a large current, thereby improving the working performance of the magnetic device 1.

[0061] Furthermore, in the magnetic device 1 provided in this application embodiment, the terminal block 12 is electrically connected to the circuit board 2, so that the magnetic device 1 can be directly electrically connected to the circuit board 2. The magnetic device 1 does not need to be provided with a wire output structure, which simplifies the electrical connection between the magnetic device 1 and the circuit board 2.

[0062] In this embodiment, the magnetic device 1 has a housing 15, and the main body 11 of the magnetic device is located inside the housing 15. The housing 15 can be an insulating housing. The housing 15 can also be a heat dissipation housing to ensure heat dissipation of the magnetic device 1.

[0063] Because terminal 12 is connected to flexible connector 13, the position of terminal 12 is prone to change, which is not conducive to the electrical connection between terminal 12 and circuit board 2. To facilitate the electrical connection between terminal 12 and circuit board 2, magnetic device 1 also includes bracket 14, which supports terminal 12. In this way, by using bracket 14 to support terminal 12, the stability of terminal 12 is improved, thereby facilitating the electrical connection between terminal 12 and circuit board 2; moreover, bracket 14 also serves to support circuit board 2.

[0064] The specific structure of the support 14 can be selected according to the actual situation, and this application embodiment does not limit it.

[0065] As shown in Figure 3, part of the bracket 14 can be located inside the housing 15, which can be understood as: one end of the bracket 14 extends out of the housing 15. In this way, there is a certain space between the housing 15 and the circuit board 2, which allows other components on the circuit board 2 to be accommodated, thus facilitating the installation of the circuit board 2.

[0066] Of course, it is also possible to choose that the bracket 14 does not extend out of the housing 15, or that the entire bracket 14 is located outside the housing 15.

[0067] Because terminal 12 is conductive, bracket 14 needs to be insulated or be an insulated bracket. For structural simplicity, the latter is preferred. For example, bracket 14 can be a plastic bracket.

[0068] Figures 4 and 5 show the mating structure of the terminal blocks 12 and the bracket 14. It should be noted that in Figures 4 and 5, to illustrate the structure of the bracket 14 and the nut 16 mentioned later, the three terminal blocks 12 are offset from the bracket 14. In the actual product, the terminal blocks 12 are mounted on the bracket 14 and connected to the flexible connector 13.

[0069] As shown in Figures 4 and 5, the bracket 14 is provided with a limiting part 141, and the terminal 12 and the limiting part 141 are clearance-fitted in the second direction and the third direction; wherein, the first direction, the second direction, and the third direction are perpendicular to each other. In this way, the terminal 12 and the bracket 14 can move relative to each other in the second direction and the third direction. Moreover, since the terminal 12 is connected to the flexible connector 13, the terminal 12 and the bracket 14 can also move relative to each other in the first direction. Thus, if the terminal 12 and the circuit board 2 cannot be installed due to assembly errors, the position of the terminal 12 can be adjusted on the bracket 14 to ensure that the terminal 12 and the circuit board 2 can be installed normally, effectively reducing the probability of installation failure due to installation errors. Correspondingly, it also reduces the deviation between the terminal 12 and the circuit board 2, thereby reducing the stress caused by installation errors and effectively improving the reliability of the electrical connection of the magnetic device.

[0070] For example, when the terminal block 12 and the circuit board 2 are fixedly connected by the fastener 3, the first mounting hole 1211 and the second mounting hole 21 can be aligned by moving the terminal block 12 on the bracket 14 in the second direction and / or the third direction, thereby reducing the probability that the terminal block 12 and the circuit board 2 cannot be assembled due to misalignment of the first mounting hole 1211 and the second mounting hole 21.

[0071] The aforementioned limiting part 141 can be a limiting hole 141a, and the axial direction of the limiting hole 141a is the first direction. The terminal 12 is provided with a limiting member 122, which is located inside the limiting hole 141a.

[0072] As shown in Figures 7 and 8, in the second direction, there is a first gap 01 between the limiting member 122 and the limiting hole 141a, which can be understood as: the limiting member 122 and the limiting hole 141a are clearance-fitted in the second direction.

[0073] For example, the limiting member 122 has a first gap 01 between one side in the second direction and the wall of the limiting hole 141a, the width of which is δ1; the limiting member 122 also has a first gap 01 between the other side in the second direction and the wall of the limiting hole 141a, the width of which is δ2. Both δ1 and δ2 are greater than zero, and δ1 and δ2 may be equal or unequal.

[0074] Of course, δ1 or δ2 can be chosen to be zero. In this way, the limiting member 122 has a first gap 01 between one side in the second direction and the wall of the limiting hole 141a, and the limiting member 122 is in contact with the wall of the limiting hole 141a on the other side in the second direction.

[0075] As shown in Figures 7, 9, and 10, in the third direction, there is a second gap 02 between the limiting member 122 and the limiting hole 141a, which can be understood as the limiting member 122 and the limiting hole 141a having a clearance fit in the third direction. This facilitates the installation of the terminal block 12 and the bracket 14.

[0076] For example, the limiting member 122 has a second gap 02 between its third-direction upward side and the wall of the limiting hole 141a, the width of which is δ3; the limiting member 122 also has a second gap 02 between its third-direction upward side and the wall of the limiting hole 141a, the width of which is δ4. Both δ3 and δ4 are greater than zero, and δ3 and δ4 may be equal or unequal.

[0077] Of course, δ3 or δ4 can be chosen to be zero. In this way, the limiting member 122 has a second gap 02 between itself and the wall of the limiting hole 141a on the third-direction side, and the limiting member 122 contacts the wall of the limiting hole 141a on the other side of the third-direction side.

[0078] The limiting hole 141a can be in other shapes such as round, square, rectangular or elliptical. The shape of the limiting member 122 is adapted to the shape of the limiting hole 141a. This application embodiment does not limit this.

[0079] In practice, the limiting part 141 also serves as a limiting groove, which accommodates the entire connection end of the terminal block 12. It should be noted that the connection end of the terminal block 12 can be understood as the connecting piece 121 mentioned later.

[0080] As mentioned above, terminal 12 is used to fix the circuit board 2 to the wire via threaded connector 3a. The conductive layer 22 of the circuit board 2 contacts and is electrically connected to terminal 12. In this case, as shown in Figure 2, threaded connector 3a can be a bolt; as shown in Figures 4 and 5, bracket 14 is provided with nut 16. Nut 16 mates with threaded connector 3a. In this way, the circuit board 2 can be fixed on bracket 14, improving the stability of the circuit board 2 and the reliability of the electrical connection between the circuit board 2 and magnetic device 1.

[0081] The aforementioned nut 16 can be a floating nut. Due to the inherent characteristics of a floating nut, it is known that the floating nut has a certain amount of floating in the three directions of the first direction, the second direction, and the axial direction of the limiting hole. In this way, the floating amount of nut 16 can help ensure the alignment of the first mounting hole 1211 and the second mounting hole 21 mentioned above. Moreover, the floating of nut 16 can accommodate the movement of terminal 12 and threaded connector 3a, ensuring that terminal 12 and circuit board 2 can be installed normally, effectively reducing the probability of installation failure due to installation errors.

[0082] As shown in Figure 6, the terminal block 12 includes a connector 121. The connector 121 is used for electrical connection with the circuit board. When the terminal block 12 is provided with a first mounting hole 1211, the first mounting hole 1211 is located on the connector 121.

[0083] The aforementioned limiting member 122 is connected to the terminal block 121, and the limiting member 122 can be connected to both sides of the terminal block 121 along a third direction. This can be understood as the limiting member 122 being distributed on both sides of the terminal block 121 along a third direction. The position of the limiting part 141 is adapted to the limiting member 122. This improves the uniformity of force distribution on the terminal block 12 and facilitates adjustment of the position of the terminal block 12 on the bracket 14.

[0084] To improve the uniformity of force distribution on the terminal block 12, the limiting member 122 can also be connected to both sides of the terminal block 121 along the second direction. This can be understood as the limiting member 122 being distributed on both sides of the terminal block 121 along the second direction. The position of the limiting part 141 is adapted to the limiting member 122.

[0085] To improve the uniformity of force distribution on the terminal block 12, the limiting member 122 can also be connected to both sides of the terminal block 121 along the second direction and both sides of the terminal block 121 along the third direction. The position of the limiting part 141 is adapted to the limiting member 122. In practice, the limiting member 122 can also be connected to one side of the terminal block 121 along the third direction; or, the limiting member 122 can be connected to one side of the terminal block 121 along the second direction; or, the limiting member 122 can be connected to one side of the terminal block 121 along the second direction and one side of the terminal block 121 along the third direction; or, the limiting member 122 can be connected to both sides of the terminal block 121 along the second direction and one side of the terminal block 121 along the third direction; or, the limiting member 122 can be connected to one side of the terminal block 121 along the second direction and both sides of the terminal block 121 along the third direction.

[0086] As can be seen from the above, the specific position of the limiting component 122 is not unique, and the specific position of the limiting component 122 can be flexibly adjusted to meet different needs.

[0087] Referring again to Figure 6, the terminal block 12 also includes a terminal block connection part 123, which connects the terminal block 121 and the flexible connector 13.

[0088] The specific position of the terminal block connection part 123 on the terminal piece 121 can be selected according to the actual situation. Specifically, the terminal block connection part 123 and the limiting member 122 can be connected to the same side or different sides of the terminal piece 121.

[0089] In some embodiments, the terminal block connection portion 123 and the limiting member 122 can be connected to different sides of the terminal block 121. This reduces the mutual influence between the terminal block connection portion 123 and the limiting member 122, facilitates the movement of the terminal block 121 on the bracket 14, thereby facilitating the electrical connection between the terminal block 121 and the circuit board 2; it also facilitates the formation of the terminal block connection portion 123 and the limiting member 122, thereby facilitating the production and manufacturing of the entire terminal block 12.

[0090] For example, when the limiting member 122 is connected to at least one side of the connector 121 along a third direction, the terminal connection portion 123 is connected to one side of the connector 121 along a second direction, so that the terminal connection portion 123 and the limiting member 122 can be connected to different sides of the connector 121.

[0091] For example, when the limiting member 122 is connected to at least one side of the connector 121 along the second direction, the terminal connection portion 123 is connected to one side of the connector 121 along the third direction, so that the terminal connection portion 123 and the limiting member 122 can be connected to different sides of the connector 121.

[0092] For example, when the limiting member 122 is connected to one side of the terminal block 121 along a third direction, the terminal connection part 123 is connected to the other side of the terminal block 121 along a third direction, so that the terminal connection part 123 and the limiting member 122 can be connected to different sides of the terminal block 121.

[0093] For example, when the limiting member 122 is connected to one side of the terminal block 121 along the second direction, the terminal connection part 123 is connected to the other side of the terminal block 121 along the second direction, so that the terminal connection part 123 and the limiting member 122 can be connected to different sides of the terminal block 121.

[0094] In practice, the terminal block connection 123 and the limiting member 122 can also be connected to the terminal piece 121 in other ways, and are not limited to the above structure.

[0095] Referring again to Figure 6, the flexible connector 13 and the coil 111 of the magnetic device body 11 are electrically connected. The connection method between the flexible connector 13 and the coil 111 can be found in the previous text and will not be repeated here.

[0096] Since the magnetic device 1 has the above-mentioned technical effects, the circuit board assembly provided in this application embodiment includes the magnetic device 1. Therefore, the circuit board assembly provided in this application embodiment also has the corresponding technical effects, which will not be described here.

[0097] Based on the circuit board assembly provided in the embodiments of this application, the embodiments of this application also provide a power conversion device, which includes the circuit board assembly provided in the above embodiments.

[0098] Since the circuit board assembly provided in this application embodiment has the above-mentioned technical effects, and the power conversion device provided in this application embodiment includes the above-mentioned circuit board assembly, the power conversion device provided in this application embodiment also has the corresponding technical effects, which will not be described here.

[0099] The technical features mentioned above, as well as those shown individually in the accompanying drawings, can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are those explicitly described herein. Any one of the multiple technical features contained in the same statement can be applied independently, without necessarily being applied together with other technical features.

[0100] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A magnetic device, characterized in that, include: The magnetic device body (11), the terminal block (12) and the flexible connector (13) are provided, wherein the flexible connector (13) electrically connects the magnetic device body (11) and the terminal block (12), and the terminal block (12) is used to electrically connect to the circuit board (2).

2. The magnetic device according to claim 1, characterized in that, It also includes a bracket (14) that supports the terminal block (12).

3. The magnetic device according to claim 2, characterized in that, The magnetic device (1) and the circuit board (2) are distributed along a first direction; the bracket (14) is provided with a limiting part (141), and the terminal block (12) and the limiting part (141) are in clearance fit in the second direction and the third direction; wherein, the first direction is the thickness direction of the circuit board (2), and the first direction, the second direction and the third direction are perpendicular to each other.

4. The magnetic device according to claim 3, characterized in that, The limiting part (141) includes a limiting hole (141a), the axial direction of the limiting hole (141a) is a first direction, the terminal (12) is provided with a limiting member (122), the limiting member (122) is located in the limiting hole (141a); in a second direction, there is a first gap (01) between the limiting member (122) and the limiting hole (141a); in a third direction, there is a second gap (02) between the limiting member (122) and the limiting hole (141a).

5. The magnetic device according to any one of claims 2-4, characterized in that, The terminal block (12) is used to fix the circuit board (2) through the threaded connector (3a), and the bracket (14) is provided with a nut (16) that mates with the threaded connector (3a); the conductive layer (22) of the circuit board (2) and the terminal block (12) are in contact and electrically connected.

6. The magnetic device according to claim 5, characterized in that, The nut (16) is a floating nut.

7. The magnetic device according to claim 4, characterized in that, The terminal block (121) of the terminal block (12) is used for electrical connection with the circuit board (2), and the limiting member (122) is connected to the terminal block (121); wherein the limiting member (122) is connected to at least one side of the terminal block (121) along a third direction; and / or, the limiting member (122) is connected to at least one side of the terminal block (121) along a second direction.

8. The magnetic device according to claim 7, characterized in that, The terminal block (12) further includes a terminal block connection portion (123) that connects the terminal piece (121) and the flexible connector (13); wherein, when the limiting member (122) is connected to at least one side of the terminal piece (121) along a third direction, the terminal block connection portion (123) is connected to one side of the terminal piece (121) along a second direction; when the limiting member (122) is connected to at least one side of the terminal piece (121) along the second direction, the... The terminal block connection part (123) is connected to one side of the terminal piece (121) along a third direction; when the limiting member (122) is connected to one side of the terminal piece (121) along a third direction, the terminal block connection part (123) is connected to the other side of the terminal piece (121) along a third direction; when the limiting member (122) is connected to one side of the terminal piece (121) along a second direction, the terminal block connection part (123) is connected to the other side of the terminal piece (121) along the second direction.

9. The magnetic device according to any one of claims 2-4, characterized in that, The bracket (14) is an insulating bracket.

10. The magnetic device according to any one of claims 1-4, characterized in that, The flexible connector (13) includes at least one of copper braided strip, flexible wire, and flexible copper busbar.

11. A circuit board assembly, characterized in that, include: The circuit board (2) and the magnetic device (1) as claimed in any one of claims 1-10.

12. A power conversion device, characterized in that, Includes the circuit board assembly as described in claim 11.

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