A current transformer and charging pile

Abstract

The utility model relates to charging pile technical field discloses a current transformer and charging pile, and the current transformer includes mounting frame, magnetic core, first coil and second coil, the magnetic core is installed in mounting frame, the first coil is around the magnetic core, and the first coil partially protrudes mounting frame, the second coil is around the magnetic core, and the second coil is accommodated in mounting frame, and the number of turns of second coil is less than the number of turns of first coil. Through above -mentioned structure, with the current that the current transformer in the prior art is big through the first coil, the heat generated in the first coil is fast, and the technical problem that the heat dissipation of current transformer is difficult.

Description

Technical Field

[0001] This utility model relates to the field of charging pile technology, and in particular to a current transformer and a charging pile. Background Technology

[0002] Currently, new energy vehicles are more environmentally friendly than ordinary vehicles, and as a result, they are gradually entering people's lives. Charging piles are electrical integrated devices used to charge new energy vehicles.

[0003] In related technologies, charging piles may include multiple current transformers. Current transformers are primarily used to convert high current into low current, facilitating current measurement by electronic components. A current transformer may include a magnetic core, a first coil, and a second coil. The first coil has more turns, while the second coil has fewer turns. The first coil is used to connect to the operating circuit, and the second coil is used to connect to the measurement circuit.

[0004] However, the large current flowing through the first coil causes the heat generated in the first coil to be generated quickly, making heat dissipation of the current transformer more difficult. Utility Model Content

[0005] The present invention aims to provide a current transformer and a charging pile to solve the technical problem in the prior art where the current through the first coil of the current transformer is large, resulting in a rapid heat generation in the first coil and making heat dissipation of the current transformer difficult.

[0006] The technical problem solved by this utility model embodiment is addressed by the following technical solution: One embodiment of this utility model provides a current transformer, comprising: Mounting rack; A magnetic core, which is mounted on the mounting bracket; A first coil is wound around the magnetic core, and a portion of the first coil extends out of the mounting bracket; The second coil is wound on the magnetic core and housed within the mounting bracket. The number of turns of the second coil is less than the number of turns of the first coil.

[0007] In some embodiments, the mounting frame includes a frame body with a receiving cavity, through which the magnetic core passes; the first coil and the second coil are both wound around the outside of the frame body.

[0008] In some embodiments, the mounting frame further includes a first limiting plate, a second limiting plate, and a third limiting plate, all of which are wound around the frame body. A first mounting cavity is formed between the first limiting plate and the second limiting plate, and a second mounting cavity is formed between the second limiting plate and the third limiting plate. A portion of the first coil is housed in the first mounting cavity, and another portion of the first coil extends out of the first mounting cavity. The second coil is housed in the second mounting cavity.

[0009] In some embodiments, the magnetic core includes a first magnet and a second magnet spliced ​​together. The first magnet includes a first insertion portion, and the second magnet includes a second insertion portion. The receiving cavity extends through opposite sides of the frame. The first insertion portion is inserted into the receiving cavity from one side of the receiving cavity, and the second insertion portion is inserted into the receiving cavity from the other opposite side of the receiving cavity. The first insertion portion and the second insertion portion are connected within the receiving cavity.

[0010] In some embodiments, the first magnet further includes a first connecting portion and two first limiting portions. The first connecting portion is connected to the side of the first plug-in portion facing away from the second plug-in portion. The two first limiting portions are respectively connected to opposite sides of the first connecting portion. One first limiting portion is located on one side of the mounting bracket, and the other first limiting portion is located on the other opposite side of the mounting bracket. The portion of the first coil housed in the first mounting cavity is located between the first limiting portion and the first plug-in portion.

[0011] In some embodiments, the mounting bracket further includes a first limiting block and a second limiting block, both of which are connected to the side of the first limiting plate facing away from the second limiting plate. The first limiting block and the second limiting block protrude from one side of the bracket body, and the first connecting portion is clamped between the first limiting block and the second limiting block.

[0012] In some embodiments, the second magnet further includes a second connecting portion and two second limiting portions. The second connecting portion is connected to the side of the second plug portion facing away from the first plug portion. The two second limiting portions are respectively connected to opposite sides of the second connecting portion. One second limiting portion is located on one side of the mounting bracket, and the other second limiting portion is located on the other opposite side of the mounting bracket. The second coil portion is located between the second limiting portion and the second plug portion.

[0013] In some embodiments, the mounting bracket further includes a third limiting block and a fourth limiting block, both of which are connected to the side of the third limiting plate facing away from the second limiting plate. The third limiting block and the fourth limiting block protrude from one side of the bracket body, and the second connecting portion is clamped between the third limiting block and the fourth limiting block.

[0014] In some embodiments, the receiving cavity has a rectangular cross-section.

[0015] Another embodiment of this utility model provides a charging pile, including the current transformer in any of the above embodiments.

[0016] Compared to existing technologies, the second coil has fewer turns than the first coil. This means the first coil is used to connect to a higher-current operating circuit, while the second coil is used to connect to a lower-current measuring circuit. The rate at which heat is generated in the first coil is greater than that in the second coil. The first coil extends beyond the mounting bracket, allowing for a larger contact area between the airflow and the first coil. This allows the airflow to carry away more heat from the surface of the first coil, improving its heat dissipation efficiency and consequently enhancing the overall heat dissipation efficiency of the current transformer. Attached Figure Description

[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings do not constitute a limitation on scale.

[0018] Figure 1 This is a perspective view of a current transformer in one embodiment of this utility model; Figure 2 yes Figure 1 Exploded view of the current transformer in the diagram; Figure 3 yes Figure 1 A 3D view of the mounting bracket in the image; Figure 4 yes Figure 1 A cross-sectional view of the current transformer in the diagram; Figure 5 yes Figure 1 Side view of the current transformer in the image.

[0019] Figure label: 100. Current transformer; 10. Mounting bracket; 11. Frame; 1102. Receiving cavity; 12. First limiting plate; 13. Second limiting plate; 14. Third limiting plate; 15. First limiting block; 16. Second limiting block; 17. Third limiting block; 18. Fourth limiting block; 102. First mounting cavity; 104. Second mounting cavity; 20. Magnetic core; 22. First magnet; 222. First insertion part; 224. First connecting part; 226. First limiting part; 24. Second magnet; 242. Second insertion part; 244. Second connecting part; 246. Second limiting part; 30. First coil; 40. Second coil. Detailed Implementation

[0020] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connected" to another element, it can be directly on the other element, or one or more intermediate elements can exist between them. The terms "upper," "lower," "left," "right," "upper end," "lower end," "top," and "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0022] The following detailed description, in conjunction with all the accompanying drawings, uses specific embodiments to illustrate a current transformer 100 and a charging pile provided in this application.

[0023] One embodiment of this utility model discloses a charging pile, which may include a main body, a charging gun head, and a charging cable, with the charging cable disposed between the main body and the charging gun head. Users can connect the charging gun head to a new energy vehicle to charge it. The main body may include a current transformer 100 and a fan structure. The current transformer 100 is mainly used to convert high current into low current, so that electronic components used for current measurement can measure the current. The fan structure can generate airflow passing through the current transformer 100, and the airflow can carry away heat from the surface of the current transformer 100.

[0024] Please refer to Figure 1 and Figure 2 The current transformer 100 includes a mounting frame 10, a magnetic core 20, a first coil 30, and a second coil 40. The magnetic core 20 is mounted on the mounting frame 10. The first coil 30 is wound on the magnetic core 20, and a portion of the first coil 30 extends out of the mounting frame 10. The second coil 40 is wound on the magnetic core 20 and housed within the mounting frame 10. The number of turns of the second coil 40 is less than the number of turns of the first coil 30.

[0025] With the above structure, the number of turns of the second coil 40 is less than the number of turns of the first coil 30. That is, the first coil 30 is used to connect to the working circuit with a larger current, and the second coil 40 is used to connect to the measuring circuit with a smaller current. The rate at which heat is generated in the first coil 30 is greater than the rate at which heat is generated in the second coil 40. The first coil 30 extends out of the mounting bracket 10, so that the airflow can have a larger contact area with the first coil 30. When the airflow passes through the first coil 30, it can carry away the heat on the surface of the first coil 30 to a greater extent, thereby improving the heat dissipation efficiency of the first coil 30 and thus improving the overall heat dissipation efficiency of the current transformer 100.

[0026] Specifically, in this embodiment, the mounting frame 10 may include a frame structure 11 formed by splicing multiple plate-like structures. The magnetic core 20 may be partially inserted into the mounting frame 10. The first coil 30 and the second coil 40 may both be wound around the periphery of the mounting frame 10. The first coil 30 and the second coil 40 may both be clamped by the plate-like structures of the mounting frame 10, so that the first coil 30 and the second coil 40 may both be fixed relative to the mounting frame 10. The first coil 30 may form a ring structure similar to a rectangle, and the second coil 40 may form a ring structure similar to a square. The length of the rectangle formed by the first coil 30 is greater than the length of the square formed by the second coil 40, so that the first coil 30 may partially extend out of the mounting frame 10, and the second coil 40 may be accommodated within the mounting frame 10.

[0027] In other embodiments, the mounting frame 10 may also include other structures, such as a hollow frame 11 structure formed by splicing multiple strip structures; the first coil 30 and the second coil 40 may also directly contact the periphery of the magnetic core 20; the first coil 30 may also be formed into other shapes, such as an elliptical ring structure; the second coil 40 may also be formed into other shapes, such as a circular ring structure.

[0028] Please refer to Figure 3 and Figure 4 In some embodiments, the mounting frame 10 includes a frame 11 with a receiving cavity 1102, through which the magnetic core 20 passes; the first coil 30 and the second coil 40 are both wound around the outside of the frame 11.

[0029] With the above structure, the frame 11 has a receiving cavity 1102 through which the magnetic core 20 passes; the cavity wall of the receiving cavity 1102 can limit the magnetic core 20. The first coil 30 and the second coil 40 are both wound on the outside of the frame 11. The cavity wall of the receiving cavity 1102 can separate the first coil 30 from the magnetic core 20, and can also separate the second coil 40 from the magnetic core 20, so as to prevent heat from the first coil 30 and the second coil 40 from being transferred to the magnetic core 20.

[0030] Specifically, in this embodiment, the frame 11 may include a hollow, cuboid-like structure, and the receiving cavity 1102 may be a cuboid-like cavity; the magnetic core 20 may be formed by splicing two parts together.

[0031] In other embodiments, the frame 11 may also include other structures, such as a hollow cylindrical structure; the receiving cavity 1102 may also have other structures, such as a cylinder or a column with an elliptical cross-section, and the magnetic core 20 may also be integrally formed.

[0032] In some embodiments, the mounting frame 10 further includes a first limiting plate 12, a second limiting plate 13, and a third limiting plate 14. The first limiting plate 12, the second limiting plate 13, and the third limiting plate 14 are all wound around the frame body 11. A first mounting cavity 102 is formed between the first limiting plate 12 and the second limiting plate 13, and a second mounting cavity 104 is formed between the second limiting plate 13 and the third limiting plate 14. A portion of the first coil 30 is housed in the first mounting cavity 102, and another portion of the first coil 30 extends out of the first mounting cavity 102. The second coil 40 is housed in the second mounting cavity 104.

[0033] With the above structure, a first mounting cavity 102 is formed between the first limiting plate 12 and the second limiting plate 13. A portion of the first coil 30 is housed within the first mounting cavity 102, and the other portion of the first coil 30 extends out of the first mounting cavity 102. The first limiting plate 12 and the second limiting plate 13 limit the first coil 30 to prevent it from detaching from the mounting frame 10, thus improving the stability of the connection between the first coil 30 and the mounting frame 10. A second mounting cavity 104 is formed between the second limiting plate 13 and the third limiting plate 14. The second coil 40 is housed within the second mounting cavity 104. The second limiting plate 13 and the third limiting plate 14 limit the second coil 40 to prevent it from detaching from the mounting frame 10.

[0034] Specifically, in some embodiments, the first limiting plate 12, the second limiting plate 13, and the third limiting plate 14 may have the same structure, and the first limiting plate 12, the second limiting plate 13, and the third limiting plate 14 are arranged sequentially along the central axis of the receiving cavity 1102, and the distance between the first limiting plate 12 and the second limiting plate 13 is equal to the distance between the second limiting plate 13 and the third limiting plate 14.

[0035] The first limiting plate 12, the second limiting plate 13, and the third limiting plate 14 may include an annular structure. The inner sides of the first limiting plate 12, the second limiting plate 13, and the third limiting plate 14 may form a rectangle, and the outer sides of the first limiting plate 12, the second limiting plate 13, and the third limiting plate 14 may form a rectangle with rounded corners at the four corners. The frame 11, the first limiting plate 12, the second limiting plate 13, and the third limiting plate 14 may be integrally formed.

[0036] In other embodiments, the first limiting plate 12, the second limiting plate 13, and the third limiting plate 14 may also include other structures, such as the outer edges being circular or elliptical; the frame 11 and the first limiting plate 12, the frame 11 and the second limiting plate 13, and the frame 11 and the third limiting plate 14 may also be connected by other means, such as dispensing or welding.

[0037] In some embodiments, the magnetic core 20 includes a first magnet 22 and a second magnet 24 spliced ​​together. The first magnet 22 includes a first insertion portion 222, and the second magnet 24 includes a second insertion portion 242. The receiving cavity 1102 extends through opposite sides of the frame 11. The first insertion portion 222 is inserted into the receiving cavity 1102 from one side, and the second insertion portion 242 is inserted into the receiving cavity 1102 from the other opposite side. The first insertion portion 222 and the second insertion portion 242 are connected within the receiving cavity 1102.

[0038] With the above structure, the magnetic core 20 includes a first magnet 22 and a second magnet 24 spliced ​​together. During the assembly of the current transformer 100, it is only necessary to insert the first plug-in part 222 into the receiving cavity 1102 from one side of the receiving cavity 1102, and then insert the second plug-in part 242 into the receiving cavity 1102 from the other opposite side of the receiving cavity 1102. Then, the first magnet 22 is spliced ​​onto the second magnet 24, and the assembly of the magnetic core 20 and the mounting bracket 10 can be completed, which simplifies the assembly process of the current transformer 100 in this embodiment.

[0039] Specifically, in this embodiment, both the first magnet 22 and the second magnet 24 may include a cuboid structure, and the first magnet 22 and the second magnet 24 have the same dimensions. The direction of the central axis of the receiving cavity 1102 may be parallel to the horizontal plane.

[0040] In other embodiments, the first magnet 22 and the second magnet 24 may also include other structures, such as cylinders; the first magnet 22 may also have different dimensions from the second magnet 24, for example, the length of the first magnet 22 is greater than the length of the second magnet 24.

[0041] In some embodiments, the first magnet 22 further includes a first connecting portion 224 and two first limiting portions 226. The first connecting portion 224 is connected to the side of the first plug-in portion 222 facing away from the second plug-in portion 242. The two first limiting portions 226 are respectively connected to opposite sides of the first connecting portion 224. One first limiting portion 226 is located on one side of the mounting bracket 10, and the other first limiting portion 226 is located on the other opposite side of the mounting bracket 10. The portion of the first coil 30 housed in the first mounting cavity 102 is located between the first limiting portion 226 and the first plug-in portion 222.

[0042] With the above structure, the portion of the first coil 30 housed in the first mounting cavity 102 is located between the first limiting portion 226 and the first insertion portion 222; the two first limiting portions 226 can clamp the first coil 30, reducing the possibility of the first coil 30 swaying relative to the frame 11. In addition, a portion of the first coil 30 can be housed between the frame 11, the first limiting plate 12, the second limiting plate 13 and the first limiting portion 226, to prevent the first coil 30 from loosening and detaching from the mounting frame 10.

[0043] Specifically, in this embodiment, the first connecting part 224 and the first limiting part 226 can both include a cuboid structure, the first insertion part 222, the first connecting part 224 and the two first limiting parts 226 can be located at the same horizontal height, and the first magnet 22 can have a structure similar to the shape of an "E".

[0044] In other embodiments, the first connecting portion 224 and the first limiting portion 226 may also include other structures, such as a cylinder.

[0045] Please refer to Figure 5 In some embodiments, the mounting frame 10 further includes a first limiting block 15 and a second limiting block 16. The first limiting block 15 and the second limiting block 16 are both connected to the side of the first limiting plate 12 facing away from the second limiting plate 13. The first limiting block 15 and the second limiting block 16 protrude from one side of the frame 11, and the first connecting part 224 is clamped between the first limiting block 15 and the second limiting block 16.

[0046] With the above structure, the first connecting part 224 is clamped between the first limiting block 15 and the second limiting block 16, and the two first limiting parts 226 are respectively connected to the opposite sides of the first connecting part 224; the two first limiting parts 226 can limit the first connecting part 224 in the horizontal direction, and the first limiting block 15 and the second limiting block 16 can limit the first connecting part 224 in the vertical direction, so that the first connecting part 224 can be more stably fixed relative to the mounting bracket 10, that is, the first magnet 22 can be more stably fixed to the mounting bracket 10.

[0047] Specifically, in this embodiment, the first limiting block 15 and the second limiting block 16 can both be integrally formed with the first limiting plate 12. The first limiting block 15 can be located on the lower side of the first connecting part 224, and the second limiting block 16 can be located on the upper side of the first connecting part 224. The first limiting block 15 can include a rectangular block structure, and the second limiting block 16 can also include a rectangular block structure. The width of the first limiting block 15 can be greater than the width of the second limiting block 16. The first limiting block 15 can have a clearance through hole for fixing the pins of the first coil 30.

[0048] In other embodiments, the first limiting block 15 and the first limiting plate 12, and the second limiting block 16 and the first limiting plate 12, can be connected to each other in other ways, such as by threaded connectors or welding.

[0049] In some embodiments, the second magnet 24 further includes a second connecting portion 244 and two second limiting portions 246. The second connecting portion 244 is connected to the side of the second plug-in portion 242 facing away from the first plug-in portion 222. The two second limiting portions 246 are respectively connected to opposite sides of the second connecting portion 244. One second limiting portion 246 is located on one side of the mounting bracket 10, and the other second limiting portion 246 is located on the other opposite side of the mounting bracket 10. The second coil 40 is partially located between the second limiting portion 246 and the second plug-in portion 242.

[0050] With the above structure, the portion of the second coil 40 housed in the second mounting cavity 104 is located between the second limiting portion 246 and the second insertion portion 242; the two second limiting portions 246 can clamp the second coil 40, reducing the possibility of the second coil 40 swaying relative to the frame 11. In addition, a portion of the second coil 40 can be housed between the frame 11, the second limiting plate 13, the third limiting plate 14, and the second limiting portion 246, preventing the second coil 40 from loosening and detaching from the mounting frame 10.

[0051] Specifically, in this embodiment, the second connecting part 244 and the second limiting part 246 can both include a cuboid structure, the second insertion part 242, the second connecting part 244 and the two second limiting parts 246 can be located at the same horizontal height, and the second magnet 24 can have a structure similar to the shape of an "E".

[0052] In other embodiments, the second connecting portion 244 and the second limiting portion 246 may also include other structures, such as a cylinder.

[0053] In some embodiments, the mounting bracket 10 further includes a third limiting block 17 and a fourth limiting block 18, both of which are connected to the side of the third limiting plate 14 facing away from the second limiting plate 13. The third limiting block 17 and the fourth limiting block 18 protrude from one side of the bracket body 11, and the second connecting portion 244 is clamped between the third limiting block 17 and the fourth limiting block 18.

[0054] With the above structure, the second connecting part 244 is clamped between the third limiting block 17 and the fourth limiting block 18, and the two second limiting parts 246 are respectively connected to the opposite sides of the second connecting part 244; the two second limiting parts 246 can limit the second connecting part 244 in the horizontal direction, and the third limiting block 17 and the fourth limiting block 18 can limit the second connecting part 244 in the vertical direction, so that the second connecting part 244 can be more stably fixed relative to the mounting bracket 10, that is, the second magnet 24 can be more stably fixed to the mounting bracket 10.

[0055] Specifically, in this embodiment, both the third limiting block 17 and the fourth limiting block 18 can be integrally formed with the third limiting plate 14. The third limiting block 17 can be located on the lower side of the second connecting part 244, and the fourth limiting block 18 can be located on the upper side of the second connecting part 244. The third limiting block 17 can include a rectangular block structure, and the fourth limiting block 18 can also include a rectangular block structure. The width of the third limiting block 17 can be greater than the width of the fourth limiting block 18. The third limiting block 17 can have a clearance through hole for fixing the pins of the second coil 40.

[0056] In other embodiments, the third limiting block 17 and the third limiting plate 14, and the fourth limiting block 18 and the third limiting plate 14, can be connected to each other in other ways, such as by threaded connectors or welding.

[0057] In some embodiments, the cross-section of the receiving cavity 1102 is rectangular.

[0058] With the above structure, when the cross-section of the receiving cavity 1102 is rectangular, the receiving cavity 1102 is easier to form, and the mounting bracket 10 is easier to manufacture.

[0059] Specifically, in other embodiments, the cross-section of the receiving cavity 1102 may also be in other shapes, such as circular or elliptical.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail; although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A current transformer, characterized in that, include: Mounting rack; A magnetic core, which is mounted on the mounting bracket; A first coil is wound around the magnetic core, and a portion of the first coil extends out of the mounting bracket; The second coil is wound on the magnetic core and housed within the mounting bracket. The number of turns of the second coil is less than the number of turns of the first coil.

2. The current transformer according to claim 1, characterized in that, The mounting frame includes a frame body with a receiving cavity, through which the magnetic core passes; the first coil and the second coil are both wound around the outside of the frame body.

3. The current transformer according to claim 2, characterized in that, The mounting frame further includes a first limiting plate, a second limiting plate, and a third limiting plate. The first limiting plate, the second limiting plate, and the third limiting plate are all wound around the frame body. A first mounting cavity is formed between the first limiting plate and the second limiting plate, and a second mounting cavity is formed between the second limiting plate and the third limiting plate. A portion of the first coil is housed in the first mounting cavity, and another portion of the first coil extends out of the first mounting cavity. The second coil is housed in the second mounting cavity.

4. The current transformer according to claim 3, characterized in that, The magnetic core includes a first magnet and a second magnet spliced ​​together. The first magnet includes a first insertion part, and the second magnet includes a second insertion part. The receiving cavity extends through opposite sides of the frame. The first insertion part is inserted into the receiving cavity from one side of the receiving cavity, and the second insertion part is inserted into the receiving cavity from the other opposite side of the receiving cavity. The first insertion part and the second insertion part are connected within the receiving cavity.

5. The current transformer according to claim 4, characterized in that, The first magnet further includes a first connecting portion and two first limiting portions. The first connecting portion is connected to the side of the first plug-in portion facing away from the second plug-in portion. The two first limiting portions are respectively connected to opposite sides of the first connecting portion. One first limiting portion is located on one side of the mounting bracket, and the other first limiting portion is located on the other opposite side of the mounting bracket. The portion of the first coil housed in the first mounting cavity is located between the first limiting portion and the first plug-in portion.

6. The current transformer according to claim 5, characterized in that, The mounting bracket further includes a first limiting block and a second limiting block. The first limiting block and the second limiting block are both connected to the side of the first limiting plate facing away from the second limiting plate. The first limiting block and the second limiting block protrude from one side of the bracket body, and the first connecting part is clamped between the first limiting block and the second limiting block.

7. The current transformer according to claim 4, characterized in that, The second magnet further includes a second connecting portion and two second limiting portions. The second connecting portion is connected to the side of the second plug portion facing away from the first plug portion. The two second limiting portions are respectively connected to opposite sides of the second connecting portion. One second limiting portion is located on one side of the mounting bracket, and the other second limiting portion is located on the other opposite side of the mounting bracket. The second coil portion is located between the second limiting portion and the second plug portion.

8. The current transformer according to claim 7, characterized in that, The mounting bracket further includes a third limiting block and a fourth limiting block. The third limiting block and the fourth limiting block are both connected to the side of the third limiting plate facing away from the second limiting plate. The third limiting block and the fourth limiting block protrude from one side of the bracket body, and the second connecting part is clamped between the third limiting block and the fourth limiting block.

9. The current transformer according to claim 2, characterized in that, The cross-section of the receiving cavity is rectangular.

10. A charging pile, characterized in that, Includes the current transformer as described in any one of claims 1-9.

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