Charger

Abstract

The utility model provides a charger. The charger includes: a cooling assembly; the power assembly comprises a circuit board and a field-effect tube, the circuit board is supported on the cooling assembly, the field-effect tube comprises a field-effect tube main body and a pin, the field-effect tube main body is arranged right opposite to the cooling assembly, one end of the pin is connected to the field-effect tube main body, and the other end of the pin is connected to the cooling assembly. The other end of the pin is attached to the circuit board; the cover plate is arranged on the side, away from the cooling assembly, of the circuit board and covers the cooling assembly and the power assembly; the pressing sheet is arranged on one side, deviating from the cooling assembly, of the field effect transistor, one surface of the pressing sheet is fixedly connected to the cover plate or the circuit board, and the other surface of the pressing sheet abuts against the surface of one side, deviating from the cooling assembly, of the power assembly, so that it is guaranteed that the power assembly has an efficient heat dissipation effect; and the reliability and the service life of the charger can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicle charging, and in particular to a charger. Background Art

[0002] On-board chargers refer to chargers that are fixedly installed on electric vehicles. The performance of on-board chargers plays a vital role in the operation of electric vehicles. Currently, the field effect transistors (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET), also known as MOS tubes, are commonly used in on-board charger products and are divided into plug-in type and surface mount type.

[0003] However, for the heat dissipation design of SMD MOS tubes, SMD MOS tubes are usually mounted on metal substrates or epoxy fiberglass cloth (Flame-Retardant, FR) substrates. Due to the material tolerance of SMD MOS tubes and the flatness of metal substrates or FR substrates, the consistency of the SMD MOS tubes and the heat dissipation surface of the metal substrate or FR substrate cannot be guaranteed, resulting in the heat dissipation reliability of the SMD MOS tubes cannot be guaranteed. Utility Model Content

[0004] In view of this, the present application provides a charger to ensure that the surface-mount field effect transistor has a good heat dissipation effect and can increase the reliability and service life of the charger.

[0005] In a first aspect, the present application provides a charger, the charger comprising:

[0006] Cooling components;

[0007] A power component, the power component comprising a circuit board and a field effect tube, the circuit board is carried by the cooling component, the field effect tube comprises a field effect tube body and a pin, the field effect tube body is arranged opposite to the cooling component, one end of the pin is connected to the field effect tube body, and the other end of the pin is attached to the circuit board;

[0008] a cover plate, the cover plate being arranged on a side of the circuit board away from the cooling assembly and covering the cooling assembly and the power assembly; and

[0009] A pressing sheet, wherein the pressing sheet is arranged on the side of the field effect tube away from the cooling component, one side of the pressing sheet is fixedly connected to the cover plate or the circuit board, and the other side of the pressing sheet is pressed against the surface of the power component away from the cooling component.

[0010] Wherein, the power component includes a plurality of the field effect transistors, the pressing sheet includes a pressing sheet body and a plurality of pressing parts, the pressing sheet body is fixedly connected to the cover plate, one end of the pressing part is connected to the pressing sheet body, and the other end of the pressing part presses against the field effect transistor, and the plurality of abutting parts press against different field effect transistors respectively.

[0011] Among them, the pressing sheet includes a bearing part and a plurality of spring parts, the bearing part is fixedly connected to the circuit board, and the bearing part covers the field effect tube, the spring part is at least partially arranged opposite to the field effect tube, and one end of the spring part is connected to the bearing part, and the other end of the spring part is pressed to the side of the field effect tube away from the cooling component.

[0012] Among them, the bearing part includes a first sub-bearing part, a second sub-bearing part and a third sub-bearing part which are bent and connected in sequence, the second sub-bearing part is arranged on the side of the field effect tube away from the circuit board, and the first sub-bearing part and the third sub-bearing part are arranged on both sides of the field effect tube in opposite directions.

[0013] Wherein, the pressing sheet includes at least two bearing parts, and the two bearing parts are arranged at intervals from each other. The pressing sheet also includes at least two connecting parts, the two connecting parts are arranged at intervals from each other, and one end of the connecting part is connected to one of the two bearing parts, and the other end of the connecting part is connected to the other of the two bearing parts.

[0014] Among them, the bearing part and the spring part are split structures, the spring part is arranged on the side of the bearing part adjacent to the power component, the pressing sheet includes at least four connecting parts, and two of the connecting parts are arranged on two opposite sides of the bearing part, and the two connecting parts are cross-arranged and adjacent to the central axis of the bearing part.

[0015] Among them, the field effect tube is arranged on a side of the circuit board adjacent to the cooling component, the pressing plate is arranged on a side of the circuit board away from the field effect tube, the orthographic projection of the pressing plate on the circuit board at least covers the orthographic projection of the field effect tube on the circuit board, and the pressing plate abuts against the surface of the circuit board away from the field effect tube.

[0016] The circuit board includes a board body and a first heat-conducting member, the board body has a through hole, the first heat-conducting member is embedded in the through hole, and the first heat-conducting member is arranged opposite to the field effect tube body.

[0017] Among them, the first heat conductive member has a third surface arranged adjacent to the field effect tube body and a fourth surface arranged adjacent to the cooling assembly, the circuit board also includes a welding member and a solder resist, the welding member is arranged on the third surface and the fourth surface, the solder resist includes a solder resist body and a grid portion, the solder resist body is arranged in contact with the circuit board, and the grid portion is arranged on the surface of the welding member away from the first heat conductive member.

[0018] Among them, the charger includes a shell, the shell abuts against the cover plate and is surrounded by the cover plate to form a receiving space, the charger also includes a filter module, a low-voltage module and a control module, the filter module, the low-voltage module and the control module are accommodated in the receiving space, the control module is stacked on the filter module and the low-voltage module, and the shell separates the filter module and the low-voltage module.

[0019] The charger provided in the present application includes a cooling component, a power component, a cover plate and a pressing plate. The field effect tube includes a field effect tube body and a pin. The field effect tube body is arranged opposite to the cooling component, so that the field effect tube body can dissipate heat through the cooling component, and the pin is attached to the circuit board. Compared with the plug-in field effect tube, the patch-type field effect tube can have a lower cost and is convenient for simplifying its assembly process. The pressing plate is arranged on the side of the field effect tube away from the cooling component, and is fixedly connected to the cover plate or the circuit board, so that the pressing plate can be well fixed to avoid the misalignment of the pressing plate. The pressing plate also presses the surface of the power component away from the cooling component to ensure that the power component is well attached to the cooling component, and when the charger shakes and collides, the pressing plate can maintain a stable position and firmly limit the power component, so as to ensure that the power component has an efficient heat dissipation effect, thereby effectively improving the heat dissipation efficiency of the charger, and can increase the reliability and service life of the charger. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained like these drawings without paying creative work.

[0021] Figure 1 is a structural schematic diagram of a charger according to an embodiment of the present application;

[0022] Figure 2 It is a schematic diagram of the three-dimensional exploded structure of the charger of the first embodiment of the present application;

[0023] Figure 3 yes Figure 2 A schematic diagram of the partial enlarged structure of the charger at position a provided in;

[0024] Figure 4 It is a schematic diagram of the structure of the tabletting of Example 1 of the present application;

[0025] Figure 5 is a schematic diagram of the cross-sectional structure of the charger along line AA of Embodiment 1 of the present application;

[0026] Figure 6 yes Figure 5 A schematic diagram of the partial enlarged structure of the charger at position b provided in;

[0027] Figure 7 It is a schematic diagram of the three-dimensional exploded structure of the charger of the second embodiment of the present application;

[0028] Figure 8 It is a schematic diagram of the structure of the tabletting of Example 2 of the present application;

[0029] Fig. 9 is a schematic diagram of the cross-sectional structure of the charger along line AA of the second embodiment of the present application;

[0030] Fig.10 yes Fig. 9 The partial enlarged structural diagram of the charger at position c provided in;

[0031] Fig.11 It is a schematic diagram of the structure of the tabletting of Example 3 of the present application;

[0032] Fig.12 is a schematic diagram of the cross-sectional structure of the charger along line AA of the fourth embodiment of the present application;

[0033] Fig.13 yes Fig.12 A schematic diagram of the partial enlarged structure of the charger at position d provided in;

[0034] Fig.14 is a three-dimensional exploded schematic diagram of the charger structure of an embodiment of the present application;

[0035] Fig.15 It is a schematic diagram of the three-dimensional exploded structure of the circuit board of the embodiment of the present application;

[0036] Fig.16 is a schematic diagram of a top view of the circuit board of an embodiment of the present application;

[0037] Fig.17 It is a schematic diagram of the three-dimensional exploded structure of the charger of the fifth embodiment of the present application.

[0038] Description of reference numerals:

[0039] 1-charger, 10-cooling component, 20-power component, 30-cover plate, 40-pressing sheet, 50-insulating sheet, 60-second heat-conducting member, 70-filter module, 80-low-voltage module, 90-control module, 21-circuit board, 22-field effect tube, 31-housing, 32-accommodating space, 41-pressing sheet body, 42-pressing portion, 43-bearing portion, 44-spring portion, 45-connecting portion, 51-first surface, 52-second surface, 211-board body, 212-first heat-conducting member, 213-welding member, 214-solder resist, 221-field effect tube body, 222-pin, 431-first sub-bearing portion, 432-second sub-bearing portion, 433-third sub-bearing portion, 2111-through hole, 2121-third surface, 2122-fourth surface, 2141-solder resist body, 2142-grid portion. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0042] Reference to "embodiment" or "implementation" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment or implementation may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0043] See also Figure 1 , Figure 2 , Figure 3 and Figure 7 , Figure 1is a schematic diagram of the structure of a charger according to an embodiment of the present application, Figure 2 is a schematic diagram of a three-dimensional exploded structure of a charger according to Embodiment 1 of the present application, Figure 3 yes Figure 2 The partial enlarged structural diagram of the charger at a provided in the figure, Figure 7 It is a schematic diagram of the three-dimensional decomposition structure of the charger of the second embodiment of the present application. The present application provides a charger 1, which includes a cooling component 10, a power component 20, a cover plate 30 and a pressing plate 40. The power component 20 includes a circuit board 21 and a field effect transistor 22, the circuit board 21 is carried by the cooling component 10, and the field effect transistor 22 includes a field effect transistor body 221 and a pin 222, the field effect transistor body 221 is arranged opposite to the cooling component 10, and one end of the pin 222 is connected to the field effect transistor body 221, and the other end of the pin 222 is attached to the circuit board 21. The cover plate 30 is arranged on the side of the circuit board 21 away from the cooling component 10, and is covered on the cooling component 10 and the power component 20. The pressing sheet 40 is arranged on the side of the field effect tube 22 away from the cooling component 10, one side of the pressing sheet 40 is fixedly connected to the cover plate 30 or the circuit board 21, and the other side of the pressing sheet 40 is pressed against the surface of the power component 20 away from the cooling component 10.

[0044] Optionally, the charger 1 is an on-board charger 1 (OBC), that is, the charger 1 is applied to an electric vehicle and can supply power to electrical devices in the electric vehicle, such as vehicle lights, display instrument lights, or other electrical devices. It can be understood that the charger 1 can also be applied to other types of electronic products, and the application scenario of the charger 1 should not be a limitation on the charger 1 provided in this embodiment.

[0045] Optionally, the cooling assembly 10 includes a cooling shell, the cooling shell is surrounded to form a cooling cavity, and the cooling cavity is used to accommodate a cooling medium. The cooling medium may be, but is not limited to, a medium with cooling function such as water, oil, or gas.

[0046] Optionally, the field effect tube 22 is a surface-mount field effect tube 22, and is electrically connected to the circuit board 21. Specifically, the field effect tube 22 includes a field effect tube body 221 and a pin 222, one end of the pin 222 is electrically connected to the field effect tube body 221, and the other end of the pin 222 is electrically connected to the circuit board 21, and the pin 222 is attached to the circuit board 21. In this embodiment, the field effect tube 22 is a surface-mount field effect tube 22, which has a lower cost and is convenient for simplifying the assembly process compared to the plug-in field effect tube 22.

[0047] Optionally, the circuit board 21 is carried by the cooling assembly 10, and heat is dissipated by the cooling assembly 10. Preferably, the cooling assembly 10 is arranged directly opposite to the field effect tube body 221, so that the heat of the field effect tube body 221 during operation can be reduced by the cooling assembly 10, thereby avoiding the situation in which the circuit board 21 is burned out due to the heat accumulation of the field effect tube body 221.

[0048] Optionally, the printed circuit board 21 (PCB) is made of a metal substrate, a flame-retardant (FR) epoxy glass fiber cloth substrate, or other board materials.

[0049] The material of the cover plate 30 includes but is not limited to aluminum plate, iron plate or other materials. Optionally, the cover plate 30 is formed by sheet metal or die casting. Preferably, the cover plate 30 can meet the pressing strength of the pressing sheet 40.

[0050] Optionally, the cover plate 30 is disposed on a side of the circuit board 21 away from the cooling assembly 10 , and the cover plate 30 and the circuit board 21 are spaced apart.

[0051] Optionally, the charger 1 further includes an insulating film, the cover plate 30 and the insulating film are stacked, and the insulating film is arranged on a side of the cover plate 30 adjacent to the circuit board 21, so as to prevent electrical components of the circuit board 21 from contacting the cover plate 30 and causing a short circuit.

[0052] Optionally, the pressing sheet 40 is disposed on a side of the field effect tube 22 away from the cooling assembly 10, and presses against a surface of the power assembly 20 away from the cooling assembly 10. Specifically, the field effect tube 22 may be disposed on a side of the circuit board 21 adjacent to the cover plate 30, and the pressing sheet 40 presses against a surface of the field effect tube 22 away from the circuit board 21.

[0053] Optionally, the pressing sheet 40 is made of spring steel, and the pressing sheet 40 is preferably made of a material with a high yield strength such as 65Mn spring steel, SK7 spring steel, or SUS301 stainless steel, so that the pressing sheet 40 can be firmly pressed against the field effect tube 22 .

[0054] Optionally, the field effect transistor 22 can also be arranged on the side of the circuit board 21 away from the cover plate 30, that is, the field effect transistor 22 can be arranged on the side of the circuit board 21 adjacent to the cooling assembly 10, and the pressing sheet 40 can be pressed against the surface of the circuit board 21 away from the field effect transistor 22.

[0055] In this embodiment, the field effect tube 22 is arranged on the side of the circuit board 21 adjacent to the cover plate 30, and the pressing sheet 40 is pressed against the surface of the field effect tube 22 away from the circuit board 21. It can be understood that the circuit board 21 can be attached with multiple field effect tubes 22. Due to the material tolerance of the field effect tube 22 and the flatness of the circuit board 21, it cannot be guaranteed that each field effect tube 22 can be well attached to the circuit board 21, resulting in the reliability of the heat dissipation of the field effect tube 22 cannot be guaranteed. The charger 1 uses the pressing sheet 40 to press against the field effect tube 22, so that the field effect tube 22 can be well attached to the circuit board 21, so that the field effect tube 22 can effectively transfer heat to the cooling component 10 through the circuit board 21, so that the field effect tube 22 can obtain a good heat dissipation effect.

[0056] Specifically, the pressing sheet 40 is disposed on the side of the field effect tube 22 away from the cooling assembly 10, and the pressing sheet 40 can abut against the surface of the field effect tube 22 on the side away from the circuit board 21. Under the pressure of the pressing sheet 40, the field effect tube 22 can be closely fitted with the circuit board 21, so that the heat generated by the field effect tube 22 during operation is effectively conducted to the cooling assembly 10 through the circuit board 21, avoiding the situation in which the field effect tube 22 and the circuit board 21 are burned due to the heat accumulation of the field effect tube 22.

[0057] Optionally, the pressing sheet 40 is fixedly connected to either the cover plate 30 or the circuit board 21 , so that the pressing sheet 40 can maintain a stable position in the charger 1 , thereby preventing the pressing sheet 40 from being misplaced when the charger 1 shakes or collides.

[0058] Optionally, when the pressing sheet 40 is fixedly connected to the cover plate 30, one side of the pressing sheet 40 can be fixedly connected to the cover plate 30 and abut against the insulating film, and the other side of the pressing sheet 40 is pressed against the surface of the power component 20 that is away from the cooling component 10. In this embodiment, part of the structure of the pressing sheet 40 is arranged inside the cover plate 30 and is connected and fixed to the cover plate 30, so that the pressing sheet 40 and the cover plate 30 have a stable connection effect, so that the pressing sheet 40 can be well fixed, so as to further avoid the misalignment of the pressing sheet 40.

[0059] Optionally, when the pressing sheet 40 is fixedly connected to the cover plate 30 , the fixing method of the pressing sheet 40 and the cover plate 30 includes but is not limited to resistance welding, screw connection, or riveting.

[0060] In summary, the charger 1 provided in this embodiment includes a cooling assembly 10, a power assembly 20, a cover plate 30 and a pressing plate 40. The field effect tube 22 includes a field effect tube body 221 and a pin 222. The field effect tube body 221 is arranged opposite to the cooling assembly 10, so that the field effect tube body 221 can dissipate heat through the cooling assembly 10, and the pin 222 is attached to the circuit board 21. Compared with the plug-in field effect tube 22, the patch-type field effect tube 22 can have a lower cost and is easy to simplify its assembly process. The pressing plate 40 is arranged on the side of the field effect tube 22 away from the cooling assembly 10, and is fixedly connected to the cover plate 30 or the circuit board 21, so that the pressing plate 40 can be well fixed to avoid the misalignment of the pressing plate 40. The pressing sheet 40 also presses against the surface of the power component 20 facing away from the cooling component 10 to ensure that the power component 20 is well attached to the cooling component 10, and when the charger 1 shakes and collides, the pressing sheet 40 can maintain a stable position and firmly limit the power component 20, thereby ensuring that the power component 20 has an efficient heat dissipation effect, thereby effectively improving the heat dissipation efficiency of the charger 1, and can increase the reliability and service life of the charger 1.

[0061] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , Figure 4 is a schematic diagram of the structure of the tabletting of Example 1 of the present application, Figure 5 is a schematic diagram of the cross-sectional structure of the charger along line AA of the first embodiment of the present application, Figure 6 yes Figure 5 The power assembly 20 includes a plurality of field effect transistors 22, the pressing sheet 40 includes a pressing sheet body 41 and a plurality of pressing portions 42, the pressing sheet body 41 is fixedly connected to the cover plate 30, one end of the pressing portion 42 is connected to the pressing sheet body 41, and the other end of the pressing portion 42 presses against the field effect transistor 22, and the plurality of abutting portions press against different field effect transistors 22 respectively.

[0062] Optionally, the number of the field effect transistors 22 may be but is not limited to two, three, four, five, or more. It is understandable that the number of the field effect transistors 22 should not be a limitation on the charger 1 provided in this embodiment.

[0063] Optionally, the pressing body 41 and the pressing portion 42 are fixedly connected or integrally formed. The pressing portion 42 is made of elastic material, so as to adapt to the field effect tubes 22 of various sizes and specifications, and can cover the dimensional tolerance of the field effect tubes 22, so that multiple field effect tubes 22 can be firmly pressed by the pressing portion 42.

[0064] Optionally, the number of the pressing parts 42 may be, but is not limited to, two, three, four, five, or more, and the number of the pressing parts 42 may be equal to the number of the field effect tubes 22. The plurality of abutting parts are pressed against different field effect tubes 22, respectively. In other words, the pressing parts 42 and the field effect tubes 22 may be arranged in a one-to-one correspondence, so that when there is a size tolerance between the plurality of field effect tubes 22, or when the surface of the circuit board 21 is uneven, each field effect tube 22 can be effectively pressed by the pressing part 42 arranged accordingly, and each field effect tube 22 can be well attached to the circuit board 21, so as to ensure that the plurality of field effect tubes 22 can be effectively cooled.

[0065] Optionally, one end of the pressing portion 42 is connected to the pressing body 41, and the other end of the pressing portion 42 presses against the field effect tube 22, so that the pressing portion 42 can press the field effect tube 22, so that the field effect tube 22 can be well attached to the circuit board 21, and then the field effect tube 22 can effectively dissipate heat through the cooling component 10.

[0066] See also Figure 7 , Figure 8 , Fig. 9 and Fig.10 , Figure 8 is a schematic diagram of the tabletting structure of Example 2 of the present application, Fig. 9 is a schematic diagram of the cross-sectional structure of the charger along line AA of the second embodiment of the present application, Fig.10 yes Fig. 9 The enlarged structural diagram of the charger at c is provided in FIG. The pressing sheet 40 includes a bearing portion 43 and a plurality of spring portions 44, the bearing portion 43 is fixedly connected to the circuit board 21, and the bearing portion 43 is disposed over the field effect tube 22, the spring portion 44 is at least partially disposed opposite to the field effect tube 22, and one end of the spring portion 44 is connected to the bearing portion 43, and the other end of the spring portion 44 is pressed against the side of the field effect tube 22 away from the cooling assembly 10.

[0067] The number of the spring pieces 44 may be, but is not limited to, two, three, four, five, or more. The number of the spring pieces 44 may be equal to the number of the field effect transistors 22 .

[0068] In an optional embodiment of the present application ( Figure 8 ), the bearing portion 43 and the spring portion 44 are integrally formed. In this embodiment, the spring portion 44 and the bearing portion 43 are an integral structure, so that there is no misalignment between the spring portion 44 and the bearing portion 43, and it is convenient to install and fix the pressing sheet 40, and the process flow of manufacturing the pressing sheet 40 can also be simplified.

[0069] Optionally, the carrying portion 43 is fixed to the circuit board 21 by a fastener, so that the carrying portion 43 and the circuit board 21 are firmly connected.

[0070] Optionally, the bearing portion 43 is disposed on the field effect tube 22, and the bearing portion 43 and the field effect tube 22 are spaced apart, thereby preventing the bearing portion 43 from colliding with the field effect tube 22 and causing damage to the field effect tube 22 when the charger 1 shakes or is collided.

[0071] Optionally, part or all of the spring portion 44 is opposite to the field effect tube 22. In other words, the field effect tube 22 is arranged on a side of the circuit board 21 adjacent to the pressing plate 40, and the spring portion 44 covers or partially covers the orthographic projection of the field effect tube 22 on the circuit board 21, thereby facilitating the spring portion 44 to press the field effect tube 22.

[0072] Optionally, one end of the spring portion 44 is connected to the bearing portion 43, and the other end of the spring portion 44 is pressed against the side of the field effect tube 22 facing away from the cooling component 10. Under the pressing action of the spring portion 44, the field effect tube 22 can be well attached to the circuit board 21, and thus the field effect tube 22 can be well dissipated through the cooling component 10.

[0073] Please refer again Fig.10 The bearing portion 43 includes a first sub-bearing portion 431, a second sub-bearing portion 432 and a third sub-bearing portion 433 which are bent and connected in sequence, the second sub-bearing portion 432 is arranged on a side of the field effect tube 22 away from the circuit board 21, and the first sub-bearing portion 431 and the third sub-bearing portion 433 are arranged on opposite sides of the field effect tube 22.

[0074] Optionally, the first sub-bearing portion 431 , the second sub-bearing portion 432 , and the third sub-bearing portion 433 are integrally formed.

[0075] Optionally, the third sub-bearing portion 433 and the first sub-bearing portion 431 are disposed on the same side of the second sub-bearing portion 432, and the bending angle between the first sub-bearing portion 431 and the second sub-bearing portion 432 is 90° or approximately 90°. The bending angle between the second sub-bearing portion 432 and the third sub-bearing portion 433 is 90° or approximately 90°.

[0076] In this embodiment, the second sub-bearing portion 432 is disposed on the side of the field effect tube 22 away from the circuit board 21, and the elastic sheet portion 44 is connected to the second sub-bearing portion 432. The first sub-bearing portion 431 and the third sub-bearing portion 433 are disposed opposite to each other on both sides of the field effect tube 22. In other words, the first sub-bearing portion 431 and the third sub-bearing portion 433 are disposed opposite to each other, so that the pressing sheet 40 can be stably supported on the circuit board 21, thereby ensuring a good pressing effect of the pressing sheet 40 on the field effect tube 22.

[0077] Please refer again Figure 8 The pressing sheet 40 includes at least two bearing portions 43 , and the two bearing portions 43 are spaced apart from each other. The pressing sheet 40 also includes at least two connecting portions 45 , and the two connecting portions 45 are spaced apart from each other. One end of the connecting portion 45 is connected to one of the two bearing portions 43 , and the other end of the connecting portion 45 is connected to the other of the two bearing portions 43 .

[0078] Optionally, the number of the bearing parts 43 is two, three, four, or more, etc. In the schematic diagram of the embodiment of the present application, the number of the bearing parts 43 is two as an example for illustration. The two bearing parts 43 are spaced apart from each other, and the two bearing parts 43 are arranged opposite to each other.

[0079] Optionally, the number of the connecting parts 45 is two, three, four, or more. In the schematic diagram of an embodiment of the present application ( Figure 8 ), the number of the connecting parts 45 is two as an example for illustration. The two connecting parts 45 are arranged at intervals from each other, and the two connecting parts 45 are arranged opposite to each other.

[0080] Optionally, the connecting portion 45 and the bearing portion 43 are integrally formed.

[0081] In this embodiment, when the circuit board 21 is attached with a plurality of field effect transistors 22 and the plurality of field effect transistors 22 are distributed in different positions, the pressing sheet 40 simultaneously presses the field effect transistors 22 by setting a plurality of the bearing parts 43, so that the charger 1 does not need to set a plurality of pressing sheets 40, and only needs to set a single pressing sheet 40 to achieve the pressing of a plurality of groups of field effect transistors 22, thereby facilitating the assembly of the pressing sheet 40, simplifying the assembly process of the charger 1, and improving the assembly efficiency of the charger 1. Furthermore, one end of the connecting portion 45 is connected to one of the two bearing parts 43, and the other end of the connecting portion 45 is connected to the other of the two bearing parts 43. In other words, the connecting portion 45 is sandwiched between the two bearing parts 43 and connects the two bearing parts 43. And two connecting parts 45 are connected between the two bearing parts 43, so that the pressing plate 40 can be stably supported on the circuit board 21, so that the pressing plate 40 has a structure similar to a "bridge shape", which effectively improves the structural stability and reliability of the pressing plate 40.

[0082] See also Fig.11 , Fig.11 1 is a schematic diagram of the structure of the pressing sheet of the third embodiment of the present application. The bearing portion 43 and the spring portion 44 are separate structures, the spring portion 44 is arranged on the side of the bearing portion 43 adjacent to the power component 20, the pressing sheet 40 includes at least four connecting portions 45, and two of the connecting portions 45 are arranged on opposite sides of the bearing portion 43, and the two connecting portions 45 are cross-arranged and arranged adjacent to the central axis of the bearing portion 43.

[0083] Optionally, the bearing portion 43 and the spring portion 44 are separate structures. Specifically, the shape of the bearing portion 43 is similar to a bridge-shaped crossbeam, and the spring portion 44 is arranged on a side of the bearing portion 43 adjacent to the power component 20. In this embodiment, the spring portion 44 and the bearing portion 43 can be made of different materials. For example, the bearing portion 43 can be made of a material with higher strength such as a die casting or a sheet metal part, so that the strength of the bearing portion 43 can be adjusted and the deformation of the bearing portion 43 can be reduced. The material of the spring portion 44 can be a material with higher yield strength such as 65Mn spring steel, SK7 spring steel, or SUS301 stainless steel, and the thickness of the spring portion 44 can be adjusted to ensure that the pressing force of multiple spring portions 44 on the field effect tube remains consistent.

[0084] Optionally, when the bearing portion 43 and the spring sheet portion 44 are separate structures, the fixing method of the bearing portion 43 and the spring sheet portion 44 includes but is not limited to resistance welding, screw connection, or riveting, so that the spring sheet portion 44 can be firmly connected to the bearing portion 43 to avoid misalignment of the spring sheet portion 44 and the bearing portion 43.

[0085] Further optionally, when the bearing portion 43 and the spring portion 44 are separate structures, and the number of the spring portion 44 is multiple, the multiple spring portion 44 can be independently provided or integrated, and the present application does not limit this.

[0086] Optionally, in the schematic diagram of this embodiment, the number of the connecting parts 45 is four as an example, wherein two of the connecting parts 45 are spaced apart and arranged opposite to each other, and the other two connecting parts 45 are arranged crosswise, thereby further improving the connection stability of the connecting parts 45. The two crosswise connecting parts 45 are arranged adjacent to the central axis of the bearing part 43, thereby effectively improving the structural strength of the pressing tablet 40.

[0087] See also Fig.12 and Fig.13 , Fig.12 is a schematic diagram of the cross-sectional structure of the charger along line AA of the fourth embodiment of the present application, Fig.13 yes Fig.12 The partial enlarged structural diagram of the charger at position d is provided in FIG. The field effect tube 22 is arranged on a side of the circuit board 21 adjacent to the cooling assembly 10, and the pressing sheet 40 is arranged on a side of the circuit board 21 away from the field effect tube 22, and the orthographic projection of the pressing sheet 40 on the circuit board 21 at least covers the orthographic projection of the field effect tube 22 on the circuit board 21, and the pressing sheet 40 abuts against the surface of the circuit board 21 away from the field effect tube 22.

[0088] Specifically, the field effect transistor 22 can be mounted on the circuit board 21 in a top cooling packaging manner, that is, the field effect transistor 22 is arranged on a side of the circuit board 21 adjacent to the cooling assembly 10 .

[0089] Optionally, the pressing sheet 40 is arranged on a side of the circuit board 21 away from the field effect tube 22 and pressed against the circuit board 21. The pressing sheet 40 presses against the circuit board 21 so that the circuit board 21 and the field effect tube 22 can be well fitted with the cooling assembly 10.

[0090] Optionally, the pressing sheet 40 covers or partially covers the orthographic projection of the field effect tube 22 on the circuit board 21, so that the pressing sheet 40 can indirectly press the field effect tube 22 against the cooling component 10 by abutting against the surface of the circuit board 21 facing away from the field effect tube 22, thereby enabling the field effect tube 22 to have an efficient heat dissipation effect.

[0091] In this embodiment, the field effect tube 22 adopts the "TOP COOLING" packaging method. The field effect tube 22 is arranged on the side of the circuit board 21 adjacent to the cooling component 10. Compared with the traditional packaging method, the field effect tube 22 can be carried by the cooling component 10 and directly conduct heat to the cooling component 10, so that the heat dissipation efficiency of the field effect tube 22 is effectively improved. In addition, the use of this packaging method can also simplify the structural design of the power component 20 and reduce the heat generation of the circuit board 21, thereby greatly improving the power density of the power component 20 and the charger 1.

[0092] Please refer again Figure 6 The circuit board 21 includes a board body 211 and a first heat-conducting member 212 . The board body 211 has a through hole 2111 . The first heat-conducting member 212 is embedded in the through hole 2111 , and the first heat-conducting member 212 is disposed opposite to the field effect tube body 221 .

[0093] Optionally, the number of the through holes 2111 may be but is not limited to one, two, three, four, five, or other numbers, and the number of the through holes 2111 may be equal to the number of the field effect transistors 22 .

[0094] Optionally, the first heat conductor 212 is made of a copper block or other materials having heat and electrical conductivity functions. In this embodiment, the first heat conductor 212 is made of a copper block as an example.

[0095] Optionally, the first heat conductor 212 is directly opposite to the field effect tube body 221. In other words, the orthographic projection of the field effect tube body 221 on the circuit board 21 covers the cross-section of the first heat conductor 212, and the field effect tube body 221 can be arranged in contact with the first heat conductor 212, so that the first heat conductor 212 can conduct the heat generated by the field effect tube body 221 to the cooling assembly 10.

[0096] In this embodiment, the first heat conductor 212 is preferably a copper block, which is embedded in the through hole 2111 and arranged opposite to the field effect tube body 221. Under the action of the pressing sheet 40, the field effect tube body 221 can be well fitted with the copper block, so that not only the heat of the field effect tube body 221 can be quickly conducted to the cooling component 10, so that the field effect tube 22 and the circuit board 21 can both quickly dissipate heat, thereby improving the heat dissipation efficiency and power density of the power component 20, but also facilitating the design of multi-layer wiring of the circuit board 21, thereby making the application range of the circuit board 21 wider.

[0097] See also Figure 6 and Fig.14 , Fig.14 : is a three-dimensional exploded schematic diagram of the partial structure of the charger of the embodiment of the present application. The charger 1 also includes an insulating sheet 50 and a second heat-conducting member 60. The insulating sheet 50 is sandwiched between the power component 20 and the cooling component 10, and insulates the power component 20 from the cooling component 10. The insulating sheet 50 also has a first surface 51 and a second surface 52 that are arranged opposite to each other. The first surface 51 is arranged adjacent to the power component 20, and the second surface 52 is arranged adjacent to the cooling component 10. The second heat-conducting member 60 covers the first surface 51 and the second surface 52.

[0098] Optionally, the insulating sheet 50 is made of plastic, rubber, plastic, or other materials with insulating properties.

[0099] Optionally, the insulating sheet 50 is sandwiched between the power component 20 and the cooling component 10 to insulate the power component 20 from the cooling component 10, thereby preventing the power component 20 from directly contacting the cooling component 10 and causing a short circuit in the circuit board 21.

[0100] Preferably, the second heat-conducting member 60 is made of silicone grease, so that the second heat-conducting member 60 has both good heat conductivity and insulation properties.

[0101] In this embodiment, the second heat conductor 60 is coated on the first surface 51 and the second surface 52 of the insulating sheet 50, thereby effectively filling the gap between the insulating sheet 50 and the power component 20, and the gap between the insulating sheet 50 and the cooling component 10, so that the heat of the power component 20 can be more efficiently transferred to the cooling component 10, thereby ensuring that the power component 20 has good heat dissipation efficiency.

[0102] See also Fig.15 and Fig.16, Fig.15 is a schematic diagram of a three-dimensional exploded structure of a circuit board according to an embodiment of the present application, Fig.16 1 is a schematic diagram of the top view of the circuit board of the embodiment of the present application. The first heat-conducting member 212 has a third surface 2121 disposed adjacent to the field effect tube body 221 and a fourth surface 2122 disposed adjacent to the cooling assembly 10. The circuit board 21 also includes a welding member 213 and a solder resist 214. The welding member 213 is disposed on the third surface 2121 and the fourth surface 2122. The solder resist 214 includes a solder resist body 2141 and a mesh portion 2142. The solder resist body 2141 is disposed in contact with the circuit board 21, and the mesh portion 2142 is disposed on the surface of the welding member 213 away from the first heat-conducting member 212.

[0103] Optionally, the welding member 213 is solder, and the solder is respectively disposed on a third surface 2121 of the first heat conductive member 212 adjacent to the field effect tube body 221 and a fourth surface 2122 of the first heat conductive member 212 adjacent to the cooling assembly 10 .

[0104] Optionally, the solder resist 214 is solder resist ink, and the solder resist 214 includes but is not limited to being prepared on a side of the circuit board 21 adjacent to the field effect transistor 22 through a printing process.

[0105] Optionally, the solder resist body 2141 includes a solder resist body 2141 and a grid portion 2142 that are connected, and the grid portion 2142 is disposed opposite to the welding piece 213 .

[0106] It can be understood that, during the reflow soldering of the field effect tube 22, more pores are easily generated between the field effect tube 22 and the first heat conductor 212, thereby affecting the heat dissipation efficiency of the field effect tube 22. In this embodiment, by arranging the assembly welding part on the surface of the circuit board 21, and the mesh part 2142 is arranged on the surface of the welding part 213 away from the first heat conductor 212, when the field effect tube 22 is reflow soldered, the solder can be discharged through the mesh part 2142, thereby effectively reducing the pores generated inside the welding part 213, and further allowing the field effect tube 22 and the first heat conductor 212 to have a high heat conduction efficiency.

[0107] See also Fig.17 , Fig.17: is a schematic diagram of the three-dimensional exploded structure of the charger of the fifth embodiment of the present application. The charger 1 includes a housing 31, the housing 31 is in contact with the cover plate 30, and is surrounded by the cover plate 30 to form a receiving space 32, the charger 1 also includes a filter module 70, a low-voltage module 80 and a control module 90, the filter module 70, the low-voltage module 80 and the control module 90 are received in the receiving space 32, the control module 90 is stacked on the filter module 70 and the low-voltage module 80, and the housing 31 separates the filter module 70 and the low-voltage module 80.

[0108] Optionally, the shell 31 is disposed on a side of the cover plate 30 adjacent to the power assembly 20 , and the shell 31 abuts against the cover plate 30 , thereby forming a receiving space 32 together with the cover plate 30 .

[0109] Optionally, the shell 31 is connected to the cooling assembly 10 , and the cooling assembly 10 can also be processed using the shell 31 .

[0110] Optionally, the charger 1 further includes a filter module 70, a low voltage module 80 and a control module 90. Specifically, the filter module 70 includes an alternating current (AC) input filter module 70 and a direct current (DC) output filter module 70, and the low voltage module 80 is a DCDC 12V low voltage module 80.

[0111] Optionally, the control module 90 is stacked on the filter module 70 and the low-pressure module 80. In other words, the control module 90 is arranged on a side of the filter module 70 and the low-pressure module 80 adjacent to the cover plate 30, and the orthographic projection of the control module 90 on the shell 31 at least partially covers the orthographic projection of the filter module 70 and the low-pressure module 80 on the shell 31.

[0112] Optionally, the shell 31 separates the filter module 70 and the low-pressure module 80. It can be understood that part of the shell 31 divides the receiving space 32 into a plurality of receiving chambers. In other words, the receiving space 32 formed by the shell 31 and the cover plate 30 includes a plurality of spaced-apart receiving chambers, and the filter module 70 and the low-pressure module 80 are respectively received in different receiving chambers.

[0113] In this embodiment, the charger 1 is designed by separately designing the filter module 70, the low-voltage module 80, the power assembly 20 and the control module 90, and the control module 90 is stacked with the filter module 70 and the low-voltage module 80, so that the charger 1 can reduce the structural size of the product and effectively improve the power density of the product. And because there is electromagnetic interference between the modules, the charger 1 uses the housing 31 to separate the filter module 70 and the low-voltage module 80, and performs electromagnetic shielding between the modules, so that the charger 1 meets a higher level of electromagnetic compatibility (EMC) requirements.

[0114] Mentioning "embodiment" and "implementation method" in this application means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrases in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments. In addition, it should also be understood that the features, structures or characteristics described in the various embodiments of the present application can be arbitrarily combined to form another embodiment that does not deviate from the spirit and scope of the technical solution of the present application, provided that there is no contradiction between them.

[0115] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the above preferred implementation modes, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A charger, characterized in that: The charger comprises: Cooling components; A power component, the power component comprising a circuit board and a field effect tube, the circuit board is carried by the cooling component, the field effect tube comprises a field effect tube body and a pin, the field effect tube body is arranged opposite to the cooling component, one end of the pin is connected to the field effect tube body, and the other end of the pin is attached to the circuit board; a cover plate, the cover plate being arranged on a side of the circuit board away from the cooling assembly and covering the cooling assembly and the power assembly; and A pressing sheet, wherein the pressing sheet is arranged on the side of the field effect tube away from the cooling component, one side of the pressing sheet is fixedly connected to the cover plate or the circuit board, and the other side of the pressing sheet is pressed against the surface of the power component away from the cooling component.

2. The charger according to claim 1, characterized in that: The power component includes a plurality of field effect transistors, the pressing sheet includes a pressing sheet body and a plurality of pressing parts, the pressing sheet body is fixedly connected to the cover plate, one end of the pressing part is connected to the pressing sheet body, and the other end of the pressing part presses against the field effect transistor, and the plurality of pressing parts press against different field effect transistors respectively.

3. The charger according to claim 1, characterized in that: The pressing sheet includes a bearing portion and a plurality of spring portions, the bearing portion is fixedly connected to the circuit board, and the bearing portion covers the field effect tube, the spring portion is at least partially arranged opposite to the field effect tube, and one end of the spring portion is connected to the bearing portion, and the other end of the spring portion is pressed against a side of the field effect tube away from the cooling component.

4. The charger according to claim 3, characterized in that: The bearing part includes a first sub-bearing part, a second sub-bearing part and a third sub-bearing part which are bent and connected in sequence, the second sub-bearing part is arranged on the side of the field effect tube away from the circuit board, and the first sub-bearing part and the third sub-bearing part are arranged on both sides of the field effect tube in opposite directions.

5. The charger according to claim 4, characterized in that: The pressing sheet includes at least two bearing parts, and the two bearing parts are spaced apart from each other. The pressing sheet also includes at least two connecting parts, the two connecting parts are spaced apart from each other, and one end of the connecting part is connected to one of the two bearing parts, and the other end of the connecting part is connected to the other of the two bearing parts.

6. The charger according to claim 5, characterized in that: The bearing part and the spring part are separate structures, the spring part is arranged on a side of the bearing part adjacent to the power component, the pressing sheet includes at least four connecting parts, and two of the connecting parts are arranged on two opposite sides of the bearing part, and the two connecting parts are cross-arranged and adjacent to the central axis of the bearing part.

7. The charger according to claim 1, characterized in that: The field effect tube is arranged on a side of the circuit board adjacent to the cooling component, and the pressing plate is arranged on a side of the circuit board facing away from the field effect tube. The orthographic projection of the pressing plate on the circuit board at least covers the orthographic projection of the field effect tube on the circuit board, and the pressing plate abuts against the surface of the circuit board facing away from the field effect tube.

8. The charger according to claim 1, characterized in that: The circuit board comprises a board body and a first heat-conducting member. The board body has a through hole. The first heat-conducting member is embedded in the through hole, and the first heat-conducting member is arranged opposite to the field effect tube body.

9. The charger according to claim 8, characterized in that: The first heat conductive member has a third surface disposed adjacent to the field effect tube body and a fourth surface disposed adjacent to the cooling assembly. The circuit board further comprises a welding member and a solder resist. The welding member is disposed on the third surface and the fourth surface. The solder resist comprises a solder resist body and a grid portion. The solder resist body is disposed on the circuit board, and the grid portion is disposed on the surface of the welding member facing away from the first heat conductive member.

10. The charger according to any one of claims 1 to 9, characterized in that: The charger includes a shell, which abuts against the cover plate and is surrounded by the cover plate to form a receiving space. The charger also includes a filter module, a low-voltage module and a control module. The filter module, the low-voltage module and the control module are received in the receiving space. The control module is stacked on the filter module and the low-voltage module, and the shell separates the filter module and the low-voltage module.

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