Filtering module and vehicle-mounted charger

Abstract

The utility model provides a filtering module and a vehicle-mounted charger. The filtering module comprises a first filtering plate, a second filtering plate and a third filtering plate. The second filter plate is arranged between the first filter plate and the third filter plate, and the thickness direction of the first filter plate is the same as that of the second filter plate. The thickness direction of the third filter plate is perpendicular to or approximately perpendicular to the thickness direction of the second filter plate, and the second filter plate is electrically connected with the first filter plate and the third filter plate. According to the filtering module provided by the invention, the whole filtering module is divided into the first filtering plate, the second filtering plate and the third filtering plate, so that the space utilization rate of the filtering module in the thickness direction of the filtering module is increased. And meanwhile, the first filter plate, the second filter plate and the third filter plate adopt the design of lamination and vertical plates, so that components among the plurality of filter plates are ensured not to interfere with one another, the structure of the filter module is more compact, and the volume of the filter module can be further reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electric vehicles, and particularly relates to a filter module and a vehicle-mounted charger. BACKGROUND

[0002] The vehicle-mounted charger is used for voltage and current conversion of internal circuits of an electric vehicle, and is an important component of the electric vehicle. The vehicle-mounted charger usually comprises a filter module, which is used for stabilizing current input into the vehicle-mounted charger and filtering electromagnetic signal interference. However, the current filter module has low space utilization. CONTENT OF THE UTILITY MODEL

[0003] In view of this, the first aspect of the application provides a filter module, which comprises a first filter plate, a second filter plate and a third filter plate, the second filter plate is arranged between the first filter plate and the third filter plate, the thickness direction of the first filter plate is the same as the thickness direction of the second filter plate, the thickness direction of the third filter plate is perpendicular to the thickness direction of the second filter plate, and the second filter plate is electrically connected with the first filter plate and the third filter plate.

[0004] The filter module provided by the first aspect of the application expands the space utilization of the filter module in the thickness direction of the filter module by dividing the whole filter module into the first filter plate, the second filter plate and the third filter plate. Meanwhile, the first filter plate, the second filter plate and the third filter plate are designed in a layering and vertical plate manner, which ensures that the components between the multiple filter plates do not interfere with each other, and makes the structure of the filter module more compact, so that the volume of the filter module can be further reduced.

[0005] Among them, the second filter plate and the third filter plate are matched through a matching groove and a matching part, and the matching part is arranged in the matching groove.

[0006] Among them, the filter module further comprises a pressure-sensitive resistor, and the pressure-sensitive resistor is arranged on the third filter plate.

[0007] Among them, one end of the first filter plate has a first filter element towards one side of the second filter plate, the first filter element protrudes from the first filter plate, along the arrangement direction of the first filter element and the second filter plate, the length of the second filter plate is less than that of the first filter plate, so that the second filter plate avoids the first filter element.

[0008] The filter module further includes a conductive component disposed between the first filter plate and the second filter plate. The conductive component includes multiple conductive sheets and an insulating component. The opposite ends of the multiple conductive sheets pass through the opposite ends of the insulating component. One end of the conductive sheet is electrically connected to the first filter plate, and the other end is electrically connected to the second filter plate.

[0009] The conductive sheet has an insertion end facing the first filter plate and an abutting end facing the second filter plate. The insertion end penetrates the first filter plate. Along the arrangement direction of the plurality of conductive sheets, the width of the insertion end is smaller than the width of the abutting end.

[0010] The conductive sheet has a supporting end facing the second filter plate, the supporting end including a bent portion and a supporting portion, the supporting portion abutting against the second filter plate.

[0011] Each of the conductive components includes a plurality of conductive sheets, each of the conductive sheets having a supporting end, the plurality of supporting ends including at least one first supporting end and at least one second supporting end, the first supporting end and the second supporting end both including the bent portion and the supporting portion, the bending direction of the bent portion of the first supporting end being opposite to the bending direction of the bent portion of the second supporting end.

[0012] The first abutment end and the second abutment end are arranged at intervals.

[0013] A second aspect of this application provides an on-board charger, the on-board charger including an input interface and a filtering module as provided in the first aspect of this application, the filtering module being electrically connected to the input interface and used to filter electromagnetic signal interference in the AC power input to the on-board charger from the input interface.

[0014] The on-board charger provided in the second aspect of this application makes full use of the space in the thickness direction of the on-board charger by using the filter module provided in the first aspect of this application, so that the on-board charger can achieve a smaller size while ensuring the filtering effect, thereby improving the power density of the on-board charger. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments of this application will be described below.

[0016] Figure 1 This is a three-dimensional structural diagram of the filter module in one embodiment of this application.

[0017] Figure 2 for Figure 1 The front view of the filter module shown.

[0018] Figure 3 for Figure 1 The diagram shows the process of removing components from the filter module.

[0019] Figure 4 for Figure 3 The diagram shows an exploded view of the filter module.

[0020] Figure 5 This is a three-dimensional structural diagram of a conductive component according to one embodiment of this application.

[0021] Figure 6 for Figure 5 The front view of the conductive component shown.

[0022] Figure 7 This is a three-dimensional structural diagram of the conductive component in another embodiment of this application.

[0023] Figure 8 This is a side view of a conductive component according to one embodiment of this application.

[0024] Figure 9 for Figure 3 A magnified view of a portion of the filter module shown.

[0025] Figure 10 This is a schematic diagram of a conductive sheet in one embodiment of this application.

[0026] Figure 11 This is a bottom view of a conductive component according to one embodiment of this application.

[0027] Figure 12 This is a bottom view of a conductive component in another embodiment of this application.

[0028] Figure 13 This is an exploded view of an on-board charger according to one embodiment of this application.

[0029] Label Explanation:

[0030] Filter module-1, on-board charger-2, input interface-3, first filter board-10, first filter element-11, shielding cover-12, second filter board-20, mating part-21, third filter board-30, mating groove-31, conductive component-40, conductive sheet-41, plug-in end-411, supporting end-412, bending part-4121, supporting part-4122, first supporting end-413, second supporting end-414, insulating part-42, positioning part-421, straightening part-422, varistor-50, connection terminal-60. Detailed Implementation

[0031] The following are preferred embodiments of this application. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

[0032] Before introducing the technical solution provided in this application, let's go over the technical issues in related technologies in detail.

[0033] On-board chargers are a crucial component of electric vehicles, primarily used for voltage conversion within the vehicle, such as converting alternating current (AC) to direct current (DC) or high-voltage electricity to low-voltage electricity. With the rapid development of electric vehicles, the size of various components within these vehicles must be gradually reduced to maximize interior passenger and storage space. This necessitates optimized structural layout and innovative design in on-board chargers to achieve higher power density.

[0034] On-board chargers typically include a filter module, which is used to stabilize the current input to the charger and filter out electromagnetic interference. However, the filter module in current on-board chargers is usually a single circuit board, resulting in a large filter board area and low space utilization, which in turn makes it difficult to improve the power density of the on-board charger.

[0035] In view of this, and to solve the above problems, this application provides a filtering module. Please refer to it. Figures 1-2 , Figure 1 This is a three-dimensional structural diagram of the filter module in one embodiment of this application. Figure 2 for Figure 1 The front view of the filter module shown.

[0036] The filter module 1 provided in this embodiment includes a first filter plate 10, a second filter plate 20, and a third filter plate 30. The filter plates are used to mount components, including but not limited to capacitors, inductors, and resistors. The second filter plate 20 is disposed between the first filter plate 10 and the third filter plate 30. The thickness direction of the first filter plate 10 is the same as the thickness direction of the second filter plate 20, and the thickness direction of the third filter plate 30 is perpendicular to the thickness direction of the second filter plate 20. The second filter plate 20 is electrically connected to the first filter plate 10 and the third filter plate 30.

[0037] The filter module 1 includes a first filter plate 10, a second filter plate 20, and a third filter plate 30. The second filter plate 20 is disposed between the first filter plate 10 and the third filter plate 30; in other words, the first filter plate 10, the second filter plate 20, and the third filter plate 30 are stacked sequentially. The thickness direction of the first filter plate 10 is the same as the thickness direction of the second filter plate 20; in other words, the plane containing the first filter plate 10 is parallel to the plane containing the second filter plate 20. The thickness direction of the third filter plate 30 is perpendicular to or approximately perpendicular to the thickness direction of the second filter plate 20; in other words, the plane containing the third filter plate 30 is perpendicular to or approximately perpendicular to the plane containing the second filter plate 20.

[0038] It is worth noting that the thickness direction refers to the direction of the smaller dimension in terms of length, width, and height of the component. For example, the thickness direction of the first filter plate 10 mentioned in this embodiment is... Figure 1 In the Z direction, the thickness direction of the second filter plate 20 is... Figure 1 In the Z direction, the thickness direction of the third filter plate 30 is... Figure 1 The X direction in this embodiment. Also, in this embodiment, "perpendicular" refers to an angle that is a right angle or approximately a right angle; approximately a right angle means an angle greater than or equal to 80° and less than 90°.

[0039] As can be seen from the above, in related technologies, the filter board is a single circuit board with a large area, making it difficult to further reduce the size of the on-board charger 2. In this embodiment, the filter module 1 includes a first filter board 10, a second filter board 20, and a third filter board 30 stacked and vertically arranged. Without affecting the filtering effect, the horizontal area of ​​the filter module 1 is reduced, and the utilization of space in the thickness direction of the on-board charger 2 by the filter board is expanded, so that the size of the on-board charger 2 can be further reduced, and the power density of the on-board charger 2 is improved.

[0040] Meanwhile, the three filter boards are stacked and arranged vertically, which cleverly utilizes the space and prevents the devices on the first filter board 10, the second filter board 20 and the third filter board 30 from interfering with each other. The structure is also compact, which helps to reduce the size of the filter module 1.

[0041] In summary, this embodiment expands the space utilization of the filter module 1 in the thickness direction by dividing the entire filter module 1 into a first filter plate 10, a second filter plate 20, and a third filter plate 30. Simultaneously, the stacked and vertical design of the first filter plate 10, the second filter plate 20, and the third filter plate 30 ensures that the components among the multiple filter plates do not interfere with each other, and makes the structure of the filter module 1 more compact, further reducing its size.

[0042] Optionally, the filter module 1 further includes a connection terminal 60 for electrically connecting other components in the on-board charger 2. The connection terminal 60 is located on the side of the first filter plate 10 opposite to the second filter plate 20.

[0043] Optionally, the first filter plate 10 has a shielding cover 12 on the side opposite to the second filter plate 20. The shielding cover 12 is used to shield the electromagnetic interference when the filter module 1 is working, thereby avoiding interference with other components.

[0044] Please refer to this as well. Figure 3 , Figure 9 , Figure 3 for Figure 1 The diagram shows the process of removing components from the filter module. Figure 9 for Figure 3 The diagram shows a partial enlarged view of the filter module. In this embodiment, the second filter plate 20 and the third filter plate 30 are connected by a mating groove 31 and a mating part 21, with the mating part 21 disposed within the mating groove 31.

[0045] As can be seen from the above, the second filter plate 20 and the third filter plate 30 are arranged perpendicularly or approximately perpendicularly. In this embodiment, the second filter plate 20 and the third filter plate 30 are engaged with the mating part 21 through a mating groove 31. The mating part 21 is inserted into the mating groove 31, thereby connecting the second filter plate 20 to the third filter plate 30. Specifically, the second filter plate 20 may have a recessed mating groove 31 on the side facing the third filter plate 30, and the third filter plate 30 may have a protruding mating part 21 on the side facing the second filter plate 20. The mating part 21 of the third filter plate 30 is inserted into the mating groove 31 of the second filter plate 20, thereby fixing the second filter plate 20 and the third filter plate 30.

[0046] Of course, in other embodiments, the second filter plate 20 may have a protruding mating portion 21 on the side facing the third filter plate 30, and the third filter plate 30 may have a recessed mating groove 31 on the side facing the second filter plate 20. The mating portion 21 of the second filter plate 20 is inserted into the mating groove 31 of the third filter plate 30, thereby fixing the second filter plate 20 and the third filter plate 30. In this embodiment, the second filter plate 20 and the third filter plate 30 are connected by an insertion method, making the connection between the second filter plate 20 and the third filter plate 30 tighter and less likely to separate.

[0047] Please refer to this again. Figure 3 , Figure 9In this embodiment, the filter module 1 further includes a varistor 50, which is disposed on the third filter plate 30. The varistor 50 is mainly used for voltage clamping when the circuit is subjected to overvoltage, absorbing excess current to protect circuit components. Furthermore, the varistor 50 is disposed on the third filter plate 30, and is located on the side opposite to the various components below the second filter plate 20. That is, this embodiment adds a varistor 50 to the filter module 1 without affecting its layout, resulting in better filtering performance and protecting the various circuit components in the on-board charger 2.

[0048] Please refer to this again. Figure 1 , Figure 9 In this embodiment, one end of the first filter plate 10 has a first filter element 11 facing the side of the second filter plate 20. The first filter element 11 protrudes from the first filter plate 10. Along the arrangement direction of the first filter element 11 and the second filter plate 20, the length of the second filter plate 20 is less than that of the first filter plate 10, so that the second filter plate 20 avoids the first filter element 11.

[0049] One end of the first filter plate 10 has a first filter element 11 facing the second filter plate 20, and the first filter element 11 protrudes from the second filter plate 20. That is, one end of the first filter plate 10 facing the second filter plate 20 has a first filter element 11. The first filter element 11 protrudes from the first filter plate 10 and passes through the second filter plate 20; in other words, the length of the first filter element 11 along the arrangement direction of the first filter plate 10 and the second filter plate 20 is greater than the distance between the first filter plate 10 and the second filter plate 20. To avoid interference between the first filter element 11 and the second filter plate 20, this embodiment makes the length of the second filter plate 20 shorter than that of the first filter plate 10, thus reserving sufficient space for the installation of the first filter element 11. This embodiment, by making the length of the second filter plate 20 shorter than that of the first filter plate 10, avoids mutual interference between the second filter plate 20 and the first filter element 11, resulting in a more reasonable structural design.

[0050] Please refer to this as well. Figures 3-9 , Figure 4 for Figure 3 The diagram shows an exploded view of the filter module. Figure 5 This is a three-dimensional structural diagram of a conductive component according to one embodiment of this application. Figure 6 for Figure 5The diagram shows a front view of the conductive component. In this embodiment, the filter module 1 further includes a conductive component 40, which is disposed between the first filter plate 10 and the second filter plate 20. The conductive component 40 includes a plurality of conductive sheets 41 and an insulating member 42. The opposite ends of the plurality of conductive sheets 41 protrude from the opposite ends of the insulating member 42. One end of the conductive sheet 41 is electrically connected to the first filter plate 10, and the other end is electrically connected to the second filter plate 20.

[0051] As can be seen from the above, the first filter plate 10 and the second filter plate 20 are stacked. In this embodiment, the filter module 1 also includes a conductive component 40. The conductive component 40 is disposed between the first filter plate 10 and the second filter plate 20, mainly used for electrically connecting the first filter plate 10 and the second filter plate 20, and also for supporting the first filter plate 10 and the second filter plate 20. The conductive component 40 includes conductive sheets 41 and insulating members 42, with the opposite ends of the conductive sheets 41 penetrating the opposite ends of the insulating members 42. The insulating members 42 are the overall shell of the conductive component 40, used to space the conductive sheets 41, and multiple conductive sheets 41 are used to form a conductive path, thereby electrically connecting the first filter plate 10 and the second filter plate 20.

[0052] In this embodiment, the first filter plate 10 and the second filter plate 20 are connected by a conductive component 40. While realizing the electrical connection between the first filter plate 10 and the second filter plate 20, the conductive component 40 can also support the first filter plate 10 and the second filter plate 20, thereby making the first filter plate 10 and the second filter plate 20 spaced apart, which facilitates the placement of various components between the first filter plate 10 and the second filter plate 20.

[0053] Optionally, the number of conductive components 40 is at least three, and the multiple conductive components 40 are spaced apart along the extension direction of the first filter plate 10, thereby facilitating the circuit connection between the first filter plate 10 and the second filter plate 20.

[0054] Please refer to Figure 7 , Figure 7 This is a three-dimensional structural diagram of the conductive component according to another embodiment of this application. Optionally, in one embodiment, the conductive component 40 has four conductive sheets 41, and the conductive sheets 41 are arranged in two groups of stacked conductive sheets 41, with each group having two conductive sheets 41. The conductive sheets 41 are arranged in a ring, which makes the structure of the conductive component 40 more stable, and it can be placed vertically on the second filter plate 20 before welding, thus improving the verticality of the conductive component 40 after welding.

[0055] Please refer to this again. Figures 4-5Optionally, the insulating component 42 has a positioning protrusion 421 on the side facing the second filter plate 20. The positioning protrusion 421 is inserted into the second filter plate 20, thereby fixing the conductive component 40 to the second filter plate 20 before welding, which facilitates welding of the conductive sheet 41 of the conductive component 40.

[0056] Alternatively, the length of the positioning protrusion 421 is less than the thickness of the second filter plate 20, that is, the positioning protrusion 421 does not penetrate the second filter plate 20, thereby preventing the positioning protrusion 421 from penetrating the second filter plate 20 and affecting the components below the second filter plate 20.

[0057] Alternatively, the length of the positioning protrusion 421 is less than the length of the end of the conductive sheet 41 facing the second filter plate 20 that protrudes from the insulating member 42. That is, when the conductive assembly 40 is placed on the second filter plate 20, the conductive sheet 41 first abuts against the second filter plate 20, and then the positioning protrusion 421 is inserted and fixed into the second filter plate 20. This prevents the positioning protrusion 421 from inserting into the second filter plate 20 first, resulting in a gap between the conductive sheet 41 and the second filter plate 20, which could lead to a poor solder joint during welding.

[0058] Please refer to Figure 8 , Figure 8 This is a side view of a conductive component according to one embodiment of this application. Optionally, the insulating member 42 has straightening portions 422 on both sides of the end facing the second filter plate 20. The straightening portions 422 can abut against the second filter plate 20 from both sides of the insulating member 42. This expands the contact distance between the insulating member 42 and the second filter plate 20 along the thickness direction, resulting in better perpendicularity after the insulating member 42 and the second filter plate 20 are fixed. This further improves the perpendicularity between the conductive component 40 and the second filter plate 20, facilitating the placement of components between the first filter plate 10 and the second filter plate 20.

[0059] Please refer to this as well. Figures 9-10 , Figure 10 This is a schematic diagram of a conductive sheet according to one embodiment of the present application. In this embodiment, the conductive sheet 41 has an insertion end 411 facing the first filter plate 10 and an abutment end 412 facing the second filter plate 20. The insertion end 411 penetrates the first filter plate 10. Along the arrangement direction of the plurality of conductive sheets 41, the width of the insertion end 411 is smaller than the width of the abutment end 412.

[0060] As can be seen from the above, the conductive component 40 is disposed between the first filter plate 10 and the second filter plate 20, and the multiple conductive pieces 41 of the conductive component 40 connect the first filter plate 10 and the second filter plate 20. In this embodiment, the conductive piece 41 has an insertion end 411 facing the first filter plate 10 and an abutting end 412 facing the second filter plate 20. The insertion end 411 penetrates the first filter plate 10 and is used to connect the first filter plate 10, while the abutting end 412 abuts against the second filter plate 20 and is used to connect the second filter plate 20. Along the arrangement direction of the multiple conductive pieces 41, the width of the insertion end 411 is smaller than the width of the abutting end 412. In other words, compared to the abutting end 412, the insertion end 411 facing the first filter plate 10 is narrower, thereby making it easier to insert the insertion end 411 into the first filter plate 10, which facilitates subsequent welding and fixing of the insertion end 411 to the first filter plate 10 on the side of the first filter plate 10 away from the second filter plate 20.

[0061] Please refer to this again. Figures 9-10 In this embodiment, the conductive sheet 41 has a supporting end 412 facing the second filter plate 20. The supporting end 412 includes a bent portion 4121 and a supporting portion 4122, and the supporting portion 4122 abuts against the second filter plate 20. The conductive sheet 41 has a supporting end 412 facing the filter plate, and the supporting end 412 is used to abut against the second filter plate 20. The supporting end 412 includes a bent portion 4121 and a supporting portion 4122. Compared with the bent portion 4121, the supporting portion 4122 is closer to the second filter plate 20, and the supporting portion 4122 abuts against the second filter plate 20. In other words, the supporting end 412 is generally L-shaped, and the conductive sheet 41 is bent on the side closer to the second filter plate 20, so that the side of the conductive sheet 41 abuts against the second filter plate 20. This facilitates the subsequent welding of the supporting end 412 to the side of the second filter plate 20 facing the first filter plate 10.

[0062] Please refer to this as well. Figures 9-11 , Figure 11 This is a bottom view of a conductive component according to an embodiment of this application. In this embodiment, each conductive component 40 includes a plurality of conductive sheets 41, each conductive sheet 41 having a supporting end 412. The plurality of supporting ends 412 include at least one first supporting end 413 and at least one second supporting end 414. Both the first supporting end 413 and the second supporting end 414 include a bent portion 4121 and a supporting portion 4122. The bending direction of the bent portion 4121 of the first supporting end 413 is opposite to the bending direction of the bent portion 4121 of the second supporting end 414.

[0063] As can be seen from the above, the conductive sheet 41 has a bent supporting end 412. In this embodiment, each conductive component 40 has multiple conductive sheets 41, and each conductive sheet 41 has a bent supporting end 412. The multiple supporting ends 412 include at least one first supporting end 413 and at least one second supporting end 414. In other words, the multiple supporting ends 412 may include two groups, one group including one or more first supporting ends 413, and the other group including one or more second supporting ends 414.

[0064] Furthermore, the bending direction of the bent portion 4121 of the first abutment end 413 is opposite to the bending direction of the second abutment portion 4122. For example, if the first abutment end 413 bends to the left perpendicular to the arrangement direction of the plurality of conductive sheets 41, then the second abutment end 414 bends to the right along the arrangement direction of the plurality of conductive sheets 41. This causes the abutment end 412, located below the insulating member 42 and abutting the second filter plate 20, to bend partially to the left and partially to the right. This makes the conductive component 40 more stable in the bending direction, preventing the conductive component 40 from tilting.

[0065] Please refer to this as well. Figures 9-12 , Figure 12 This is a bottom view of the conductive component according to another embodiment of this application. In this embodiment, the first supporting end 413 and the second supporting end 414 are arranged alternately. As can be seen from the above, the bending directions of the first supporting end 413 and the second supporting end 414 are opposite, thereby making the conductive component 40 more stable and preventing the conductive component 40 from tipping over. Based on this, in this embodiment, the first supporting end 413 and the second supporting end 414 can be arranged alternately, for example, one first supporting end 413 followed by one second supporting end 414 followed by another first supporting end 413, or one first supporting end 413 followed by two second supporting ends 414, followed by another first supporting end 413, etc. As long as the first supporting end 413 and the second supporting end 414 are not completely separated, they are arranged alternately. By arranging the first supporting end 413 and the second supporting end 414 at intervals, the structure of the conductive component 40 is made more stable, and the conductive component 40 is better prevented from tipping over.

[0066] Please refer to Figure 13 , Figure 13 This is an exploded view of an on-board charger according to one embodiment of this application. This embodiment provides an on-board charger 2, which includes an input interface 3 and a filter module 1 as provided in the above embodiments of this application. The filter module 1 is electrically connected to the input interface 3 and is used to filter electromagnetic signal interference in the AC power input to the on-board charger 2 from the input interface 3.

[0067] The on-board charger 2 includes an input interface 3 and a filter module 1 as provided in the above embodiments of this application. The filter module 1 is electrically connected to the input interface 3 and is disposed within the on-board charger 2. When the on-board charger 2 is running, the filter module 1 can process the current input to the on-board charger 2, thereby filtering electromagnetic signal interference of the current input to the on-board charger 2, and thus protecting other components in the on-board charger 2. The on-board charger 2 provided in this embodiment, by using the filter module 1 provided in the above embodiments of this application, fully utilizes the space in the thickness direction of the on-board charger 2, enabling the on-board charger 2 to achieve a smaller size while ensuring the filtering effect, thereby improving the power density of the on-board charger 2.

[0068] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly specified. Moreover, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0070] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0071] The foregoing has provided a detailed description of the embodiments of this application, elucidating and explaining the principles and implementation methods of this application. These descriptions are merely for the purpose of aiding understanding the method and core ideas of this application. However, the content of this specification should not be construed as a limitation of this application. Those skilled in the art can make various modifications and variations to this application without departing from its spirit and scope. These modifications and variations fall within the scope of the claims of this application and their equivalents.

Claims

1. A filtering module, characterized in that, The filtering module includes a first filter plate, a second filter plate, and a third filter plate. The second filter plate is disposed between the first filter plate and the third filter plate. The thickness direction of the first filter plate is the same as that of the second filter plate, and the thickness direction of the third filter plate is perpendicular to that of the second filter plate. The second filter plate is electrically connected to the first filter plate and the third filter plate.

2. The filtering module as described in claim 1, characterized in that, The second filter plate and the third filter plate are connected by a mating groove and a mating part, and the mating part is located in the mating groove.

3. The filtering module as described in claim 1, characterized in that, The filter module also includes a varistor, which is disposed on the third filter board.

4. The filtering module as described in claim 1, characterized in that, One end of the first filter plate has a first filter element facing the side of the second filter plate. The first filter element protrudes from the first filter plate. Along the arrangement direction of the first filter element and the second filter plate, the length of the second filter plate is less than that of the first filter plate, so that the second filter plate avoids the first filter element.

5. The filtering module as described in claim 1, characterized in that, The filter module further includes a conductive component disposed between the first filter plate and the second filter plate. The conductive component includes multiple conductive sheets and an insulating component. The opposite ends of the multiple conductive sheets pass through the opposite ends of the insulating component. One end of the conductive sheet is electrically connected to the first filter plate, and the other end is electrically connected to the second filter plate.

6. The filtering module as described in claim 5, characterized in that, The conductive sheet has a plug-in end facing the first filter plate and a supporting end facing the second filter plate. The plug-in end penetrates the first filter plate. Along the arrangement direction of the plurality of conductive sheets, the width of the plug-in end is smaller than the width of the supporting end.

7. The filtering module as described in claim 5, characterized in that, The conductive sheet has a supporting end facing the second filter plate, the supporting end including a bent portion and a supporting portion, the supporting portion abutting against the second filter plate.

8. The filtering module as described in claim 7, characterized in that, Each of the conductive components includes a plurality of conductive sheets, each of the conductive sheets having a supporting end, the plurality of supporting ends including at least one first supporting end and at least one second supporting end, the first supporting end and the second supporting end both including the bent portion and the supporting portion, the bending direction of the bent portion of the first supporting end being opposite to the bending direction of the bent portion of the second supporting end.

9. The filtering module as described in claim 8, characterized in that, The first abutment end and the second abutment end are arranged at intervals.

10. An on-board charger, characterized in that, The on-board charger includes an input interface and a filter module as described in any one of claims 1-9, wherein the filter module is electrically connected to the input interface and is used to filter electromagnetic signal interference in the AC power input to the on-board charger from the input interface.

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