A transformer assembly, an integrated circuit board and a charging pile

Abstract

The utility model relates to charging pile technical field discloses a transformer subassembly, integrated circuit board and charging pile, and transformer subassembly includes autotransformer and inductance component, autotransformer includes first transformer magnetic core, second transformer magnetic core, primary winding and secondary winding, and primary winding includes first, second pin, and primary winding is around the first transformer magnetic core and second transformer magnetic core, and secondary winding includes first, second pin, and secondary winding is around the first transformer magnetic core and second transformer magnetic core, and inductance component includes first, second inductance magnetic core, first, second inductance coil, and first inductance coil includes fifth, sixth pin, and first inductance coil and primary winding integrative forming, and second inductance coil includes seventh, eighth pin, and second inductance coil and secondary winding integrative forming, through above -mentioned structure, improve the device integration, reduce the number of pin connection in the circuit board, to solve the technical problem of integrated circuit board assembly complex.

Description

Technical Field

[0001] This utility model relates to the field of charging pile technology, and in particular to a transformer assembly, an integrated circuit board, 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, a charging pile may include multiple integrated circuit boards, which can be used to control the power output of the charging pile. The integrated circuit board may include a main body, a PFC inductor, and an autotransformer. The PFC inductor can be used for a power factor correction circuit to improve the input power factor of electronic devices. Generally, the PFC inductor and the autotransformer need to be connected to the main body of the integrated circuit board first, and then the pins of the PFC inductor and the pins of the autotransformer are soldered together to make the PFC inductor and the autotransformer electrically connected.

[0004] However, the small size of the main body of the integrated circuit board makes the process of soldering the pins of the PFC inductor and the pins of the autotransformer together difficult, resulting in a more complex assembly process for the integrated circuit board. Utility Model Content

[0005] The present invention aims to provide a transformer assembly, an integrated circuit board, and a charging pile to solve the technical problem that the process of soldering the pins of the PFC inductor and the pins of the autotransformer together is difficult in the prior art, which leads to a complicated assembly process of the integrated circuit board.

[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 transformer assembly, including: An autotransformer includes a first transformer core, a second transformer core, a primary winding, and a secondary winding; the primary winding includes a first pin and a second pin, a portion of which is wound on the first transformer core and another portion on the second transformer core; the secondary winding includes a third pin and a fourth pin, a portion of which is wound on the first transformer core and another portion on the second transformer core. An inductor component, comprising a first inductor core, a second inductor core, a first inductor coil, and a second inductor coil; the first inductor coil includes a fifth pin and a sixth pin, the first inductor coil being wound around the first inductor core, and the first inductor coil being integrally formed with the primary coil such that the fifth pin is electrically connected to the first pin; the second inductor coil includes a seventh pin and an eighth pin, the second inductor coil being wound around the second inductor core, and the second inductor coil being integrally formed with the secondary coil such that the seventh pin is electrically connected to the third pin.

[0007] In some embodiments, the transformer assembly further includes a mounting plate, to which the first transformer core, the second transformer core, the first inductor core, and the second inductor core are all connected.

[0008] In some embodiments, the first pin is located above the primary coil, the second pin is located below the primary coil; the third pin is located above the secondary coil, the fourth pin is located below the secondary coil; the fifth pin is located above the first inductor, the sixth pin is located below the first inductor; the seventh pin is located above the second inductor, and the eighth pin is located below the second inductor.

[0009] In some embodiments, the mounting plate has four clearance through holes, which are located at the four corners of the mounting plate, and the second pin, the fourth pin, the sixth pin and the eighth pin are respectively passed through one of the corresponding clearance through holes.

[0010] In some embodiments, the primary coil includes a first sub-coil and a second sub-coil electrically connected to each other, with a first pin connected to the end of the first sub-coil facing away from the second sub-coil and a second pin connected to the end of the second sub-coil facing away from the first sub-coil; the secondary coil includes a third sub-coil and a fourth sub-coil electrically connected to each other, with a third pin connected to the end of the third sub-coil facing away from the fourth sub-coil and a fourth pin connected to the end of the fourth sub-coil facing away from the third sub-coil; the first sub-coil and the fourth sub-coil are wound on the first transformer core, and the second sub-coil and the third sub-coil are wound on the first transformer core, with the first sub-coil located above the fourth sub-coil and the third sub-coil located above the second sub-coil; the first sub-coil, the second sub-coil, and the first inductor are formed by winding the same wire; the third sub-coil, the fourth sub-coil, and the second inductor are formed by winding the same wire.

[0011] In some embodiments, the transformer assembly further includes a first limiting member and a second limiting member, the first limiting member being connected to the lower side of the first transformer core and the second transformer core, the second limiting member being connected to the upper side of the first transformer core and the second transformer core, the primary coil and the secondary coil being located between the first limiting member and the second limiting member; the first limiting member is mounted on the mounting plate.

[0012] In some embodiments, the transformer assembly further includes a third limiting member and a fourth limiting member, the third limiting member being connected to the lower side of the first inductor core and the second inductor core, the fourth limiting member being connected to the upper side of the first inductor core and the second inductor core, the first inductor coil and the second inductor coil being located between the third limiting member and the fourth limiting member; the third limiting member is mounted on the mounting plate.

[0013] In some embodiments, the primary coil, the secondary coil, the first inductor, and the second inductor all include flat conductors.

[0014] Another embodiment of the present invention provides an integrated circuit board, including the transformer assembly in any of the above embodiments.

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

[0016] Compared with the prior art, the first inductor coil is integrally formed with the primary coil so that the fifth pin is electrically connected to the first pin; the second inductor coil is integrally formed with the secondary coil so that the seventh pin is electrically connected to the third pin; the transformer assembly in this embodiment can be assembled before being installed on the integrated circuit board. After the transformer assembly is installed on the integrated circuit board, only the second pin, fourth pin, sixth pin and eighth pin need to be electrically connected to other electronic components on the integrated circuit board, which simplifies the assembly process of the integrated circuit board. 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 transformer assembly in one embodiment of the present invention; Figure 2 yes Figure 1 Exploded view of the autotransformer and inductor components in the transformer assembly; Figure 3 yes Figure 1 A structural view of the mounting plate of the transformer assembly in the diagram; Figure 4 yes Figure 1 A structural view of the primary and secondary coils of a transformer assembly in a circuit. Figure 5 yes Figure 1 A three-dimensional view of the transformer assembly from another angle; Figure label: 100. Transformer assembly; 10. Autotransformer; 12. First transformer core; 14. Second transformer core; 16. Primary coil; 162. First pin; 164. Second pin; 166. First sub-coil; 168. Second sub-coil; 18. Secondary coil; 182. Third pin; 184. Fourth pin; 186. Third sub-coil; 188. Fourth sub-coil; 20. Inductor component; 22. First inductor core; 24. Second inductor core; 26. First inductor coil; 262. Fifth pin; 264. Sixth pin; 28. Second inductor coil; 282. Seventh pin; 284. Eighth pin; 30. Mounting plate; 302. Clearance through hole; 40. First limiting member; 50. Second limiting member; 60. Third limiting member; 70. Fourth limiting member. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] The following detailed description, in conjunction with all the accompanying drawings, describes a transformer assembly 100, an integrated circuit board, and a charging pile provided in this application through specific embodiments.

[0022] 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. A user can connect the charging gun head to a new energy vehicle to charge it. The main body may include a power supply component and multiple integrated circuit boards, which can be used to control the output power of the power supply component.

[0023] The integrated circuit board may include a motherboard, a transformer assembly 100, and other electronic components, which may be fixed on the motherboard.

[0024] Please refer to Figure 1 and Figure 2 The transformer assembly 100 may include an autotransformer 10 and an inductor 20; the autotransformer 10 includes a first transformer core 12, a second transformer core 14, a primary coil 16, and a secondary coil 18; the primary coil 16 includes a first pin 162 and a second pin 164, a portion of the primary coil 16 is wound on the first transformer core 12, and another portion is wound on the second transformer core 14; the secondary coil 18 includes a third pin 182 and a fourth pin 184, a portion of the secondary coil 18 is wound on the first transformer core 12, and another portion is wound on the second transformer core 14.

[0025] The inductor component 20 includes a first inductor core 22, a second inductor core 24, a first inductor coil 26, and a second inductor coil 28. The first inductor coil 26 includes a fifth pin 262 and a sixth pin 264. The first inductor coil 26 is wound around the first inductor core 22 and is integrally formed with the primary coil 16, such that the fifth pin 262 is electrically connected to the first pin 162. The second inductor coil 28 includes a seventh pin 282 and an eighth pin 284. The second inductor coil 28 is wound around the second inductor core 24 and is integrally formed with the secondary coil 18, such that the seventh pin 282 is electrically connected to the third pin 182.

[0026] With the above structure, the first inductor coil 26 is integrally formed with the primary coil 16, so that the fifth pin 262 is electrically connected to the first pin 162; the second inductor coil 28 is integrally formed with the secondary coil 18, so that the seventh pin 282 is electrically connected to the third pin 182; the transformer assembly 100 of this embodiment can be assembled before being installed on the integrated circuit board. After the transformer assembly 100 is installed on the integrated circuit board, it is only necessary to electrically connect the second pin 164, the fourth pin 184, the sixth pin 264 and the eighth pin 284 to other electronic components on the integrated circuit board, which simplifies the assembly process of the integrated circuit board.

[0027] Specifically, in this embodiment, both the first transformer core 12 and the second transformer core 14 can include a structure similar to a cylinder. Both the primary coil 16 and the secondary coil 18 can include flat coils with a rectangular cross-section. Both the primary coil 16 and the secondary coil 18 can include two sub-coils. One sub-coil of the primary coil 16 is sleeved on the first transformer core 12, and the other sub-coil of the primary coil 16 is sleeved on the second transformer core 14. One sub-coil of the secondary coil 18 is sleeved on the first transformer core 12, and the other sub-coil of the secondary coil 18 is sleeved on the second transformer core 14.

[0028] Both the first inductor core 22 and the second inductor core 24 can include a cylindrical body with a waist-shaped cross-section. Both the first inductor coil 26 and the second inductor coil 28 can include a flat coil with a rectangular cross-section. The first inductor coil 26 and the primary coil 16 can be formed by winding a single flat wire, so that the first inductor coil 26 and the primary coil 16 are integrally formed. The second inductor coil 28 and the secondary coil 18 can also be formed by winding a single flat wire, so that the second inductor coil 28 and the secondary coil 18 are integrally formed.

[0029] In other embodiments, the first transformer core 12 and the second transformer core 14 may also be in other shapes, such as an elliptical column or a column with a waist-shaped cross-section; the first inductor core 22 and the second inductor core 24 may also be in other shapes, such as a column with an elliptical cross-section; the primary coil 16, the secondary coil 18, the first inductor coil 26 and the second inductor coil 28 may also include wires of other shapes, such as wires with a circular cross-section.

[0030] Please refer to Figure 1 and Figure 3 In some embodiments, the transformer assembly 100 further includes a mounting plate 30, to which the first transformer core 12, the second transformer core 14, the first inductor core 22, and the second inductor core 24 are all connected.

[0031] With the above structure, the mounting plate 30 can be used to install the first transformer core 12, the second transformer core 14, the first inductor core 22, and the second inductor core 24, so that the first transformer core 12, the second transformer core 14, the first inductor core 22, and the second inductor core 24 are all relatively fixed, so as to facilitate the assembly of the transformer assembly 100.

[0032] Specifically, in this embodiment, the mounting plate 30 may include a rectangular plate structure, and a block-shaped limiting member may be provided between the first transformer core 12 and the mounting plate 30, between the second transformer core 14 and the mounting plate 30, between the first inductor core 22 and the mounting plate 30, and between the second inductor core 24 and the mounting plate 30.

[0033] In other embodiments, the mounting plate 30 may also include other structures, such as circular or elliptical plate structures; the first transformer core 12 and the mounting plate 30, the second transformer core 14 and the mounting plate 30, the first inductor core 22 and the mounting plate 30, and the second inductor core 24 and the mounting plate 30 may also be directly fixedly connected.

[0034] In some embodiments, the first pin 162 is located above the primary coil 16, and the second pin 164 is located below the primary coil 16; the third pin 182 is located above the secondary coil 18, and the fourth pin 184 is located below the secondary coil 18; the fifth pin 262 is located above the first inductor coil 26, and the sixth pin 264 is located below the first inductor coil 26; the seventh pin 282 is located above the second inductor coil 28, and the eighth pin 284 is located below the second inductor coil 28.

[0035] With the above structure, the second pin 164 is located below the primary coil 16, the fourth pin 184 is located below the secondary coil 18, the sixth pin 264 is located below the first inductor coil 26, and the eighth pin 284 is located below the second inductor coil 28. The second pin 164, the fourth pin 184, the sixth pin 264, and the eighth pin 284 can be closer to the motherboard of the integrated circuit board, and the second pin 164, the fourth pin 184, the sixth pin 264, and the eighth pin 284 are more convenient for electrical connection with other electronic components of the integrated circuit board.

[0036] Specifically, in this embodiment, the second pin 164, the fourth pin 184, the sixth pin 264 and the eighth pin 284 can all include flat wires arranged perpendicular to the horizontal plane, and the second pin 164, the fourth pin 184, the sixth pin 264 and the eighth pin 284 can all pass through the mounting plate 30.

[0037] In other embodiments, the second pin 164, the fourth pin 184, the sixth pin 264 and the eighth pin 284 may be inclined relative to the horizontal plane or parallel to the horizontal plane.

[0038] In some embodiments, the mounting plate 30 has four clearance through holes 302, which are located at the four corners of the mounting plate 30. The second pin 164, the fourth pin 184, the sixth pin 264 and the eighth pin 284 are respectively passed through a corresponding clearance through hole 302.

[0039] With the above structure, the second pin 164, the fourth pin 184, the sixth pin 264 and the eighth pin 284 are respectively disposed in a corresponding clearance through hole 302; the hole wall of each clearance through hole 302 can position a corresponding pin, so that after the mounting plate 30 is fixed to the motherboard of the integrated circuit board, the second pin 164, the fourth pin 184, the sixth pin 264 and the eighth pin 284 can all approach the corresponding electronic components, so that the integrated circuit board in this embodiment is easier to assemble.

[0040] Specifically, in this embodiment, the mounting plate 30 may include a rectangular plate structure, and the clearance through hole 302 may include a through hole similar to a rectangle. The four clearance through holes 302 are respectively located at the four corners of the mounting plate 30. Correspondingly, the first transformer core 12, the second transformer core 14, the first inductor core 22, and the second inductor core 24 are also respectively located at the four corners of the mounting plate 30.

[0041] In other embodiments, the clearance through-hole 302 may also include through-holes of other shapes, such as elliptical or circular.

[0042] Please refer to the above as well. Figure 2 and Figure 4In some embodiments, the primary coil 16 includes a first sub-coil 166 and a second sub-coil 168 electrically connected to each other. A first pin 162 is connected to the end of the first sub-coil 166 facing away from the second sub-coil 168, and a second pin 164 is connected to the end of the second sub-coil 168 facing away from the first sub-coil 166. The secondary coil 18 includes a third sub-coil 186 and a fourth sub-coil 188 electrically connected to each other. A third pin 182 is connected to the end of the third sub-coil 186 facing away from the fourth sub-coil 188, and a fourth pin 184 is connected to the end of the fourth sub-coil 188 facing away from the first sub-coil 166. One end of the third sub-coil 186; the first sub-coil 166 and the fourth sub-coil 188 are wound on the first transformer core 12, the second sub-coil 168 and the third sub-coil 186 are wound on the first transformer core 12, the first sub-coil 166 is located above the fourth sub-coil 188, and the third sub-coil 186 is located above the second sub-coil 168; the first sub-coil 166, the second sub-coil 168 and the first inductor coil 26 are formed by winding the same wire; the third sub-coil 186, the fourth sub-coil 188 and the second inductor coil 28 are formed by winding the same wire.

[0043] With the above structure, the first sub-coil 166 and the fourth sub-coil 188 are wound on the first transformer core 12, and the second sub-coil 168 and the third sub-coil 186 are wound on the first transformer core 12, so that the structure of the autotransformer 10 is more compact.

[0044] The first sub-coil 166 is located above the fourth sub-coil 188, the third sub-coil 186 is located above the second sub-coil 168, the second pin 164 is connected to the end of the second sub-coil 168 facing away from the first sub-coil 166, and the fourth pin 184 is connected to the end of the fourth sub-coil 188 facing away from the third sub-coil 186; thus, the second pin 164 and the fourth pin 184 can be located at a lower position, so that the second pin 164 and the fourth pin 184 can be electrically connected to the corresponding electronic components in the integrated circuit board.

[0045] Please see Figure 5 In some embodiments, the transformer assembly 100 further includes a first limiting member 40 and a second limiting member 50. The first limiting member 40 is connected to the lower side of the first transformer core 12 and the second transformer core 14, and the second limiting member 50 is connected to the upper side of the first transformer core 12 and the second transformer core 14. The primary coil 16 and the secondary coil 18 are located between the first limiting member 40 and the second limiting member 50. The first limiting member 40 is mounted on the mounting plate 30.

[0046] With the above structure, the primary coil 16 and the secondary coil 18 are located between the first limiting member 40 and the second limiting member 50; the first limiting member 40 and the second limiting member 50 are used to limit the primary coil 16 and the secondary coil 18 to prevent the primary coil 16 and the secondary coil 18 from detaching from the first transformer core 12 and the second transformer core 14.

[0047] Specifically, in this embodiment, both the first limiting member 40 and the second limiting member 50 may include a block structure similar to a cuboid, and the four corners of both the first limiting member 40 and the second limiting member 50 are provided with rounded corners; an insulating gasket may be provided on the upper side of the first limiting member 40 to prevent the primary coil 16 or the secondary coil 18 from directly contacting the first limiting member 40; an insulating gasket may also be provided on the lower side of the second limiting member 50 to prevent the primary coil 16 or the secondary coil 18 from directly contacting the second limiting member 50.

[0048] In other embodiments, the first limiting member 40 and the second limiting member 50 may also include other structures, such as elliptical columnar bodies.

[0049] In some embodiments, the transformer assembly 100 further includes a third limiting member 60 and a fourth limiting member 70. The third limiting member 60 is connected to the lower side of the first inductor core 22 and the second inductor core 24, and the fourth limiting member 70 is connected to the upper side of the first inductor core 22 and the second inductor core 24. The first inductor coil 26 and the second inductor coil 28 are located between the third limiting member 60 and the fourth limiting member 70. The third limiting member 60 is mounted on the mounting plate 30.

[0050] With the above structure, the first inductor coil 26 and the second inductor coil 28 are located between the third limiting member 60 and the fourth limiting member 70; the third limiting member 60 and the fourth limiting member 70 are used to limit the first inductor coil 26 and the second inductor coil 28 to prevent the first inductor coil 26 and the second inductor coil 28 from separating from the first inductor core 22 and the second inductor core 24.

[0051] Specifically, in this embodiment, both the third limiting member 60 and the fourth limiting member 70 may include a block structure similar to a cuboid, and the four corners of both the third limiting member 60 and the fourth limiting member 70 are provided with rounded corners; an insulating gasket may be provided on the upper side of the third limiting member 60 to prevent the first inductor coil 26 and the second inductor coil 28 from directly contacting the third limiting member 60; an insulating gasket may also be provided on the lower side of the fourth limiting member 70 to prevent the first inductor coil 26 and the second inductor coil 28 from directly contacting the fourth limiting member 70.

[0052] In other embodiments, the third limiting member 60 and the fourth limiting member 70 may also include other structures, such as elliptical columnar bodies.

[0053] In some embodiments, the primary coil 16, the secondary coil 18, the first inductor coil 26, and the second inductor coil 28 all include flat conductors.

[0054] With the above structure, the flat wire allows for a more compact arrangement of the primary coil 16, secondary coil 18, first inductor 26, and second inductor 28; and the cross-sectional area of ​​the flat wire can be larger to reduce the resistance values ​​of the primary coil 16, secondary coil 18, first inductor 26, and second inductor 28.

[0055] Specifically, in this embodiment, the primary coil 16, the secondary coil 18, the first inductor coil 26, and the second inductor coil 28 can all include wires with a rectangular cross-section, the height of which is less than the width of which makes the wires flat.

[0056] In other embodiments, the primary coil 16, the secondary coil 18, the first inductor coil 26, and the second inductor coil 28 may also include conductors of other shapes, such as conductors with an oblong or elliptical cross-section.

[0057] 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 transformer assembly, characterized in that, include: An autotransformer includes a first transformer core, a second transformer core, a primary winding, and a secondary winding; the primary winding includes a first pin and a second pin, a portion of which is wound on the first transformer core and another portion on the second transformer core; the secondary winding includes a third pin and a fourth pin, a portion of which is wound on the first transformer core and another portion on the second transformer core. An inductor component, comprising a first inductor core, a second inductor core, a first inductor coil, and a second inductor coil; the first inductor coil includes a fifth pin and a sixth pin, the first inductor coil being wound around the first inductor core, and the first inductor coil being integrally formed with the primary coil such that the fifth pin is electrically connected to the first pin; the second inductor coil includes a seventh pin and an eighth pin, the second inductor coil being wound around the second inductor core, and the second inductor coil being integrally formed with the secondary coil such that the seventh pin is electrically connected to the third pin.

2. The transformer assembly according to claim 1, characterized in that, It also includes a mounting plate, to which the first transformer core, the second transformer core, the first inductor core, and the second inductor core are all connected.

3. The transformer assembly according to claim 2, characterized in that, The first pin is located on the upper side of the primary coil, and the second pin is located on the lower side of the primary coil; the third pin is located on the upper side of the secondary coil, and the fourth pin is located on the lower side of the secondary coil; the fifth pin is located on the upper side of the first inductor, and the sixth pin is located on the lower side of the first inductor; the seventh pin is located on the upper side of the second inductor, and the eighth pin is located on the lower side of the second inductor.

4. The transformer assembly according to claim 3, characterized in that, The mounting plate has four clearance holes, which are located at the four corners of the mounting plate. The second pin, the fourth pin, the sixth pin, and the eighth pin are respectively passed through one of the corresponding clearance holes.

5. The transformer assembly according to claim 3, characterized in that, The primary coil includes a first sub-coil and a second sub-coil electrically connected to each other. The first pin is connected to the end of the first sub-coil facing away from the second sub-coil, and the second pin is connected to the end of the second sub-coil facing away from the first sub-coil. The secondary coil includes a third sub-coil and a fourth sub-coil electrically connected to each other. The third pin is connected to the end of the third sub-coil facing away from the fourth sub-coil, and the fourth pin is connected to the end of the fourth sub-coil facing away from the third sub-coil. The first sub-coil and the fourth sub-coil are wound on the first transformer core, and the second sub-coil and the third sub-coil are wound on the first transformer core. The first sub-coil is located above the fourth sub-coil, and the third sub-coil is located above the second sub-coil. The first sub-coil, the second sub-coil, and the first inductor are formed by winding the same wire. The third sub-coil, the fourth sub-coil, and the second inductor are formed by winding the same wire.

6. The transformer assembly according to claim 2, characterized in that, It also includes a first limiting member and a second limiting member. The first limiting member is connected to the lower side of the first transformer core and the second transformer core, and the second limiting member is connected to the upper side of the first transformer core and the second transformer core. The primary coil and the secondary coil are located between the first limiting member and the second limiting member. The first limiting member is mounted on the mounting plate.

7. The transformer assembly according to claim 2, characterized in that, It also includes a third limiting member and a fourth limiting member. The third limiting member is connected to the lower side of the first inductor core and the second inductor core, and the fourth limiting member is connected to the upper side of the first inductor core and the second inductor core. The first inductor coil and the second inductor coil are located between the third limiting member and the fourth limiting member. The third limiting member is mounted on the mounting plate.

8. The transformer assembly according to claim 1, characterized in that, The primary coil, the secondary coil, the first inductor, and the second inductor all include flat conductors.

9. An integrated circuit board, characterized in that, Includes the transformer assembly as described in any one of claims 1-8.

10. A charging pile, characterized in that, Includes the integrated circuit board as described in claim 9.

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