Filtering assembly

Abstract

The utility model relates to the technical field of electrical load testing, in particular to a filtering assembly. The filtering assembly comprises a first circuit board, a filtering part, a first positive electrode part and a first negative electrode part, the first circuit board comprises a body part and a first circuit, the body part is provided with a first side wall and a second side wall which are oppositely arranged in the thickness direction of the body part, the first circuit is arranged on the first side wall, and the second circuit is arranged on the second side wall. The body part is provided with a first hole penetrating through the first side wall and the second side wall; the first positive electrode part is connected to the first side wall, the first negative electrode part is connected to the second side wall, and the first positive electrode part is connected with the input end of the first circuit; the filtering part is connected between the first positive electrode part and the first negative electrode part, and the filtering part is connected in parallel with the first circuit board; the first circuit board further comprises a conductive piece, and the conductive piece is contained in the first hole and selectively connected to the output end of the first circuit and the first negative electrode part. The passing rate of the insulation resistance test of the filter assembly is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical load testing, in particular to a filter assembly. BACKGROUND

[0002] At present, in the electrical load testing, for the high-voltage 800V silicon carbide electric drive assembly product, when the insulation resistance between the positive (+) and negative (-) is tested, the test is usually carried out by referring to the electrical load testing standard. In particular, when the bus filter assembly with high-voltage discharge function is tested, only the insulation resistance of the entire bus filter assembly can be tested. If any circuit in the bus filter assembly has a problem, it will cause the insulation test result of the entire bus filter assembly to be unqualified, thereby causing the low pass rate of the insulation resistance test of the bus filter assembly. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a filter assembly which improves the pass rate of the insulation resistance test of the filter assembly.

[0004] In order to achieve the above purpose, the main technical scheme adopted by the present application comprises:

[0005] The present application provides a filter assembly, which comprises a first circuit board, a filter part, a first positive electrode part and a first negative electrode part. The first circuit board comprises a body part and a first circuit. Along the thickness direction of the body part, the body part has a first side wall and a second side wall arranged oppositely, the first circuit is arranged on the first side wall, and the body part has a first hole penetrating through the first side wall and the second side wall. The first positive electrode part is connected to the first side wall, the first negative electrode part is connected to the second side wall, and the first positive electrode part is connected to the input end of the first circuit. The filter part is connected between the first positive electrode part and the first negative electrode part, and the filter part is connected in parallel with the first circuit board. The first circuit board further comprises a conductive member, the conductive member is accommodated in the first hole and selectively connected to the output end of the first circuit and the first negative electrode part.

[0006] The filter assembly provided by the present application has the first circuit arranged on the first side wall of the body part, the first circuit connected between the first positive electrode part and the conductive member, and the first negative electrode part connected to the second side wall. When the conductive member is connected to the output end of the first circuit and the first negative electrode part, the first circuit board is turned on; when the conductive member is not connected to any one of the output end of the first circuit and the first negative electrode part, the first circuit board is in an off state.

[0007] When the conductive piece is connected with the output end of the first circuit and the first negative pole part, the first circuit board is turned on, and the first circuit board is connected in parallel with the filter part, which can be used to test the inter-terminal insulation resistance of the entire filter assembly; when the conductive piece is not connected with any one of the output end of the first circuit and the first negative pole part, the first circuit board is in an off state, which can be used to test the inter-terminal insulation resistance of the filter part, so as to realize the test of the inter-terminal insulation resistance of the entire filter assembly and the inter-terminal insulation resistance of the filter part, thereby improving the pass rate of the inter-terminal insulation resistance test.

[0008] Optionally, the conductive piece includes a first part and a second part connected together, along the axial direction of the first hole, the first part is connected to one end of the second part, and along the radial direction of the first hole, the first part protrudes from the outer peripheral surface of the second part, wherein the first part is used to be connected with the output end of the first circuit, and the second part is used to be selectively connected with the first negative pole part.

[0009] In the above scheme, when the second part is connected with the first negative pole part, the first circuit board is turned on; when the second part is not connected with the first negative pole part, the first circuit board is in an off state. By mechanically controlling the on-off state of the second part and the first negative pole part, different test requirements are realized, and the test pass rate of the filter assembly is improved.

[0010] Optionally, the filter assembly further includes a housing, the first circuit board and the filter part are arranged in the housing, the first positive pole part includes a first positive pole sheet and a second positive pole sheet, the first positive pole sheet is arranged on the first side wall and connected with the input end of the first circuit, and the second positive pole sheet is connected with the first positive pole sheet and extends out of the housing; the first negative pole part includes a first negative pole sheet and a second negative pole sheet, the first negative pole sheet is arranged on the second side wall and selectively connected with the output end of the first circuit through the conductive piece, and the second negative pole sheet is connected with the first negative pole sheet and extends out of the housing.

[0011] In the above scheme, the first negative pole sheet is arranged on the second side wall, when the conductive piece is connected with the first negative pole sheet through the first hole, the inter-terminal insulation resistance of the entire filter assembly can be detected, and the insulation resistance of the entire filter assembly is the insulation resistance of the circuit formed after the first circuit board and the filter part are connected in parallel; when the conductive piece is not connected with the first negative pole sheet, the insulation resistance of the filter part can be detected.

[0012] Optionally, the first circuit includes a circuit body and a first connecting part connected in sequence, the circuit body is connected with the first positive pole sheet, the first connecting part is connected with the first part, and along the thickness direction of the body part, the ratio of the projection area of the first connecting part to the projection area of the first part is a, which satisfies: 1≤a≤2.

[0013] In the above scheme, the first connecting part has a projection area greater than that of the first part along the thickness direction of the body part, so that the connection between the first connecting part and the first part meets the overcurrent capacity, and the temperature rise caused by the contact resistance of the connection between the first connecting part and the first part is reduced.

[0014] Optionally, the conductive part is configured as a first screw, and the first screw is threadedly matched with the first hole.

[0015] In the above scheme, the conductive part is threadedly matched with the first hole, so that the conductive part can always be kept in the first hole, the connection stability of the conductive part with the output end of the first circuit and the first negative plate is improved, the conductive part is not easy to fall off from the first hole, the conductive part is not easy to be lost, and the operation is facilitated.

[0016] Optionally, the first circuit board further comprises a metal connecting part arranged in the shell, the first negative plate comprises a second connecting part, the second connecting part is clamped between the metal connecting part and the second side wall, and the conductive part is selectively connected with the second connecting part.

[0017] In the above scheme, when the second part of the conductive part is connected with the second connecting part of the first negative plate through the first hole, the metal connecting part clamps the second connecting part, so that the connection stability of the second connecting part and the conductive part is improved.

[0018] In addition, since the metal connecting part is a metal part, it has conductivity, and when the second part of the conductive part passes through the second hole and contacts the metal connecting part, the metal connecting part can also connect the conductive part and the second connecting part, so that the connection stability between the conductive part and the first negative plate is improved.

[0019] Optionally, the conductive part is configured as a second screw, and the metal connecting part has a second hole, and the second screw is threadedly matched with the second hole.

[0020] In the above scheme, the conductive part is threadedly matched with the second hole of the metal connecting part, and when the conductive part is threadedly matched with the second hole, the metal connecting part, the second connecting part and the conductive part are conductive, so that the connection stability between the first negative plate and the conductive part is further improved.

[0021] Optionally, the filter part comprises a first ferrite core, a second ferrite core, a nanocrystalline core and a second circuit board arranged in the shell, the first ferrite core, the second ferrite core and the nanocrystalline core are connected in series between the second positive plate and the second negative plate to form a second circuit, and the second circuit, the first circuit board and the second circuit board are connected in parallel.

[0022] In the above scheme, the filtering part is used to filter electromagnetic noise, wherein the first ferrite core and the second ferrite core are mainly used to filter low-frequency electromagnetic noise; the nanocrystalline magnetic core is mainly used to filter high-frequency electromagnetic noise; the shell is mainly used to fix the components of the filtering part; the second circuit board is mainly used to filter medium-frequency electromagnetic noise; and the first circuit board is mainly used to high-voltage discharge voltage. When the first circuit board, the second circuit board and the second circuit are connected in parallel, the inter-electrode insulation resistance of the entire filtering assembly can be tested; when the first circuit board is disconnected, the second circuit board and the second circuit are connected in parallel, the inter-electrode insulation resistance of the second circuit and the second circuit board can be tested.

[0023] Optionally, the first circuit board is further provided with an X capacitor and a Y capacitor, the X capacitor is connected between the first positive plate and the first negative plate, and the Y capacitor is connected between the first positive plate and the first negative plate.

[0024] Optionally, the first circuit includes a plurality of parallel circuits, each parallel circuit includes a plurality of resistors connected in series with each other. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0026] Figure 1 It is a structural schematic diagram of the filtering assembly of the present application.

[0027] Figure 2 It is a bottom view of the internal structure of the filtering assembly of the present application.

[0028] Figure 3 It is a rear view of the internal structure of the filtering assembly of the present application.

[0029] Figure 4 It is a side view of the internal structure of the filtering assembly of the present application.

[0030] Figure 5 It is a structural schematic diagram of the first circuit board of the present application.

[0031]

Explanation of reference numerals

[0032] 1: shell;

[0033] 2: first circuit board; 21: body portion; 210: first hole; 211: first side wall; 212: second side wall; 22: first circuit; 221: circuit body; 222: first connection portion; 23: conductive member; 231: first portion; 232: second portion; 24: X capacitor; 25: Y capacitor

[0034] 3: first positive electrode portion; 31: first positive electrode tab; 32: second positive electrode tab

[0035] 4: first negative electrode portion; 41: first negative electrode tab; 42: second negative electrode tab

[0036] 5: filter portion; 51: first ferrite core; 52: nanocrystalline core; 53: second circuit board

[0037] 6: metal connecting member

[0038] A: thickness direction of body portion DETAILED DESCRIPTION

[0039] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0040] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the present application are only for the purpose of describing specific embodiments of the present application and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification of the present application and claims and the above description of drawings are intended to cover not exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, rather than to describe a particular order or primary and secondary relationships.

[0041] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it necessarily mutually exclusive or alternative embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments.

[0042] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "attachment" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] The term "and / or" in the present application is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects have an "or" relationship.

[0044] "Multiple" appearing in the present application means more than two (including two), and similarly, "multiple groups" means more than two groups (including two groups), and "multiple pieces" means more than two pieces (including two pieces).

[0045] When testing the bus filter assembly with high voltage discharge function, if the insulation resistance of the filter circuit of the filter assembly needs to be tested, it must be installed before the circuit board with discharge circuit, but at this time the inter-terminal insulation resistance of the filter assembly with discharge circuit cannot be detected; if the inter-terminal insulation resistance of the filter assembly with discharge circuit is detected, only the inter-terminal insulation resistance of the entire filter assembly can be detected, and the insulation resistance of the filter circuit cannot be detected. When the results detected in the above detection methods are unqualified, it is not possible to determine whether the problem is with the filter circuit or with the circuit board with discharge circuit, so the entire bus filter assembly will be considered as unqualified, resulting in low pass rate of the insulation resistance test of the bus filter assembly.

[0046] Therefore, in view of the problem of testing the insulation resistance between the positive (+) and negative (-) of the high-voltage 800V silicon carbide electric drive assembly product, a kind of insulation resistance test device can be designed from the perspective of production cost and structure space, which can test the insulation resistance of the entire filter assembly and the insulation resistance of the filter circuit, accurately determine the problem circuit and improve the pass rate of the insulation resistance test.

[0047] In view of this, reference is made to Figures 1 to 5The embodiment of the present application provides a filter assembly, which comprises a first circuit board 22, a filter part 5, a first positive pole part 3 and a first negative pole part 4, the first circuit board 22 comprises a body part 21 and a first circuit 22, the body part 21 has a first side wall 211 and a second side wall 212 which are oppositely arranged along a thickness direction A of the body part 21, the first circuit 22 is arranged on the first side wall 211, and the body part 21 has a first hole 210 which penetrates the first side wall 211 and the second side wall 212; the first positive pole part 3 is connected to the first side wall 211, the first negative pole part 4 is connected to the second side wall 212, and the first positive pole part 3 is connected to an input end of the first circuit 22; the filter part 5 is connected between the first positive pole part 3 and the first negative pole part 4, and the filter part 5 is connected in parallel with the first circuit board 22; wherein the first circuit board 22 further comprises a conductive part 23, the conductive part 23 is accommodated in the first hole 210 and selectively connected to an output end of the first circuit 22 and the first negative pole part 4.

[0048] The filter assembly provided by the embodiment of the present application, the first circuit 22 is arranged on the first side wall 211 of the body part 21, the first circuit 22 is connected between the first positive pole part 3 and the conductive part 23, and the first negative pole part 4 is connected to the second side wall 212. The conductive part 23 is located in the first hole 210, and when the conductive part 23 is connected to the output end of the first circuit 22 and the first negative pole part 4, the first circuit board 22 is turned on; when the conductive part 23 is not connected to any one of the output end of the first circuit 22 and the first negative pole part 4, the first circuit board 22 is in an off state.

[0049] When the conductive part 23 is connected to the output end of the first circuit 22 and the first negative pole part 4, the first circuit board 22 is turned on, the first circuit board 22 is connected in parallel with the filter part 5, and can be used for testing the inter-pole insulation resistance of the entire filter assembly, wherein the insulation resistance of the entire filter assembly is the insulation resistance of the circuit formed after the first circuit board 22 and the filter part 5 are connected in parallel; when the conductive part 23 is not connected to any one of the output end of the first circuit 22 and the first negative pole part 4, the first circuit board 22 is in an off state, and can be used for testing the inter-pole insulation resistance of the filter part 5, so as to realize the test of the inter-pole insulation resistance of the entire filter assembly and the inter-pole insulation resistance of the filter part 5, thereby improving the pass rate of the inter-pole insulation resistance test and improving the qualified rate of the filter assembly product.

[0050] It should be understood that when the first circuit board 22 is in an off state, the conductive part 23 can be accommodated in the first hole 210 and connected to the output end of the first circuit 22 or the first negative pole part 4; or the conductive part 23 is separated from the first hole 210 and not connected to the output end of the first circuit 22 and the first negative pole part 4.

[0051] Optionally, with reference to Figure 4The conductive member 23 comprises a first part 231 and a second part 232 connected together, the first part 231 is connected to one end of the second part 232 along the axial direction of the first hole 210, and the first part 231 protrudes from the outer peripheral surface of the second part 232, wherein the first part 231 is used to be connected to the output end of the first circuit 22, and the second part 232 is used to be selectively connected to the first negative electrode part 4.

[0052] Specifically, when the conductive member 23 is accommodated in the first hole 210, the first part 231 abuts against the first side wall 211 of the body part 21 and is connected to the output end of the first circuit 22. The second part 232 extends through the first hole 210 and is selectively connected to the first negative electrode part 4. When the second part 232 is connected to the first negative electrode part 4, the first circuit board 22 is in a connected state; when the second part 232 is not connected to the first negative electrode part 4, the first circuit board 22 is in a disconnected state. By mechanically controlling the connection and disconnection of the second part 232 and the first negative electrode part 4, different test requirements can be achieved, and the test pass rate of the filter assembly can be improved.

[0053] It should be understood that when the first circuit board 22 is in a disconnected state, the second part 232 can be accommodated in the first hole 210 but not connected to the first negative electrode part 4, or the second part 232 can be separated from the first hole 210. The present application can also control the connection of the second part 232 and the first negative electrode part 4 by controlling the relative position of the second part 232 of the conductive part in the first hole 210.

[0054] Optionally, referring to Figure 1 and Figure 2 The filter assembly further comprises a housing 1, the first circuit board 22 and the filter part 5 are arranged in the housing 1, the first positive electrode part 3 comprises a first positive electrode sheet 31 and a second positive electrode sheet 32, the first positive electrode sheet 31 is arranged on the first side wall 211 and connected to the input end of the first circuit 22, and the second positive electrode sheet 32 is connected to the first positive electrode sheet 31 and extends out of the housing 1; the first negative electrode part 4 comprises a first negative electrode sheet 41 and a second negative electrode sheet 42, the first negative electrode sheet 41 is arranged on the second side wall 212 and is selectively connected to the output end of the first circuit 22 through the conductive member 23, and the second negative electrode sheet 42 is connected to the first negative electrode sheet 41 and extends out of the housing 1.

[0055] Specifically, the first positive electrode sheet 31 is arranged on the first side wall 211 and can serve as a positive electrode lead-out end of the first circuit board 22, and the first positive electrode sheet 31 is connected to the second positive electrode sheet 32; the first negative electrode sheet 41 is arranged on the second side wall 212 and can serve as a negative electrode lead-out end of the first circuit board 22, and the first negative electrode sheet 41 is connected to the second negative electrode sheet 42. The second positive electrode sheet 32 serves as a positive electrode lead-out end of the entire filter assembly, and the second negative electrode sheet 42 serves as a negative electrode lead-out end of the entire filter assembly. A detection instrument can be connected to the second positive electrode sheet 32 and the second negative electrode sheet 42 to detect the inter-electrode insulation resistance of the filter assembly.

[0056] The first negative electrode sheet 41 is arranged on the second side wall 212. When the conductive member 23 passes through the first hole 210 and is connected with the first negative electrode sheet 41, the inter-electrode insulation resistance of the entire filter assembly can be detected. The insulation resistance of the entire filter assembly is the insulation resistance of the circuit formed by the first circuit board 22 and the filter part 5 in parallel. When the conductive member 23 is not connected with the first negative electrode sheet 41, the insulation resistance of the filter part 5 can be detected.

[0057] Optionally, referring to Figure 5 The first circuit 22 comprises a circuit body 221 and a first connecting part 222 connected in sequence. The circuit body 221 is connected with the first positive electrode sheet 31. The first connecting part 222 is connected with the first part 231. The ratio of the projection area of the first connecting part 222 to the projection area of the first part 231 along the thickness direction A of the body part 21 is a, which satisfies: 1≤a≤2.

[0058] Specifically, the circuit body 221 comprises components and wires or copper skins in communication with the components. Exemplarily, the components are resistors. The first connecting part 222 is located between the circuit body 221 and the first part 231, and is used to connect the circuit body 221 and the first part 231. When the second part 232 of the conductive member 23 is connected with the first negative electrode part 4, the first part 231 abuts against the first connecting part 222. The projection area of the first connecting part 222 is greater than the projection area of the first part 231 along the thickness direction A of the body part 21, so that the connection between the first connecting part 222 and the first part 231 satisfies the overcurrent capacity, and the temperature rise caused by the contact resistance at the connection between the first connecting part 222 and the first part 231 is reduced.

[0059] The ratio a of the projection area of the first connecting part 222 to the projection area of the first part 231 along the thickness direction A of the body part 21 can be 1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 or 2.

[0060] If the ratio a of the projection area of the first connecting part 222 to the projection area of the first part 231 is less than 1, it indicates that the area of the first connecting part 222 is too small to satisfy the overcurrent capacity, and the temperature rise caused by the contact resistance at the connection between the first connecting part 222 and the first part 231 is large. If the ratio a of the projection area of the first connecting part 222 to the projection area of the first part 231 is greater than 1, it indicates that the area of the first connecting part 222 is too large, and the area of the first circuit board 22 is also large.

[0061] Optionally, the conductive member 23 is configured as a first screw, which is screwed with the first hole 210. The conductive member 23 is screwed with the first hole 210, and the connection state of the conductive member 23 with the first negative plate 41 can be mechanically controlled by controlling the lead length of the conductive member 23 in the first hole 210. Moreover, the conductive member 23 can be kept in the first hole 210 all the time, and when the first negative plate 41 needs to be connected, the conductive member 23 is only needed to be rotated to move towards the second side wall 212 of the body part 21, so that the first negative plate 41 can be connected; and when the first negative plate 41 needs to be disconnected, the conductive member 23 is only needed to be rotated to move towards the first side wall 211 of the body part 21, so that the first negative plate 41 can be disconnected.

[0062] The screwing of the conductive member 23 with the first hole 210 enables the conductive member 23 to be kept in the first hole 210 all the time, which can improve the connection stability of the conductive member 23 with the output end of the first circuit 22 and the first negative plate 41, and the conductive member 23 is not easy to fall off from the first hole 210, so that the conductive member 23 is not easy to be lost, and the operation is facilitated.

[0063] Optionally, referring to Figure 2 , the first circuit board 22 further comprises a metal connecting member 6 arranged in the shell 1, and the first negative plate 41 comprises a second connecting part (not shown in the figure), which is clamped between the metal connecting member 6 and the second side wall 212, and the conductive member 23 is selectively connected with the second connecting part.

[0064] The metal connecting member 6 is arranged in the shell 1 and located away from the first side wall 211 of the body part 21, and the second connecting part is clamped between the metal connecting member 6 and the second side wall 212. When the second part 232 of the conductive member 23 passes through the first hole 210 to be connected with the second connecting part of the first negative plate 41, the metal connecting member 6 clamps the second connecting part, thereby improving the connection stability of the second connecting part with the conductive member 23.

[0065] It should be understood that, since the metal connecting member 6 is a metal member and has conductivity, when the second part 232 of the conductive member 23 passes through the second hole to contact the metal connecting member 6, the metal connecting member 6 can also connect the conductive member 23 and the second connecting part, thereby improving the connection stability between the conductive member 23 and the first negative plate 41.

[0066] Optionally, the conductive member 23 is configured as a second screw, and the metal connecting member 6 has a second hole, which is screwed with the second screw.

[0067] The conductive member 23 is screwed with the second hole of the metal connecting member 6, and when the conductive member 23 is screwed in the second hole, the metal connecting member 6, the second connecting part and the conductive member 23 are in conduction, which can further improve the connection stability between the first negative plate 41 and the conductive member 23.

[0068] Optionally, referring to Figures 1 to 3 , the filter part 5 comprises a first ferrite core 51, a second ferrite core, a nanocrystalline magnetic core 52 and a second circuit board 53 arranged in the shell 1, the first ferrite core 51, the second ferrite core and the nanocrystalline magnetic core 52 are connected in series between the second positive plate 32 and the second negative plate 42 to form a second circuit, and the second circuit, the first circuit board 22 and the second circuit board 53 are connected in parallel.

[0069] The filter part 5 is used for filtering electromagnetic noise, wherein the first ferrite core 51 and the second ferrite core are mainly used for filtering low-frequency electromagnetic noise; the nanocrystalline magnetic core 52 is mainly used for filtering high-frequency electromagnetic noise; the shell 1 is mainly used for fixing the components of the filter part 5; the second circuit board 53 is mainly used for filtering medium-frequency electromagnetic noise; and the first circuit board 22 is mainly used for high-voltage discharge voltage.

[0070] When the conductive piece 23 is tightened in the second hole in the direction of the metal connecting piece 6, the conductive piece 23 is in communication with the first negative plate 41, the first circuit board 22, the second circuit board 53 and the second circuit are connected in parallel, and can be used for testing the inter-terminal insulation resistance of the entire filter assembly; rotating the conductive piece 23 in the direction away from the metal connecting piece 6, so that the first negative plate 41 and the metal connecting piece 6 are both not connected with the conductive piece 23, at this time the first circuit board 22 is disconnected, and the second circuit board 53 and the second circuit are connected in parallel, which can be used for testing the inter-terminal insulation resistance of the second circuit and the second circuit board 53.

[0071] Optionally, referring to Figure 3 , the first circuit board 22 is further provided with an X capacitor 24 and a Y capacitor 25, the X capacitor 24 is connected between the first positive plate 31 and the first negative plate 41, and the Y capacitor 25 is connected between the first positive plate 31 and the first negative plate 41.

[0072] Specifically, the X capacitor 24 is connected between the first positive plate 31 and the first negative plate 41, which can bypass the high-frequency interference signals between the positive and negative plates, so that these interference signals cannot enter the subsequent circuit, thereby effectively suppressing the differential mode interference. The Y capacitor 25 is connected between the first positive plate 31 and the first negative plate 41, and when the common mode interference signal appears, it can bypass the interference signal to the ground wire, thereby reducing the influence of the interference on the circuit.

[0073] In this application, the parameters of the X capacitor 24 and the Y capacitor 25 can be designed according to the requirements of the frequency band, and the setting positions of the X capacitor 24 and the Y capacitor 25 can also be determined according to the specific circumstances.

[0074] Optionally, the first circuit 22 comprises a plurality of parallel circuits, each parallel circuit comprising a plurality of resistors connected in series with each other. In one specific embodiment, the first circuit 22 comprises 7 parallel circuits, each parallel circuit comprising 6 resistors connected in series, the first circuit 22 being integrated as a bleeder function resistor on the first side wall 211 of the body portion 21.

[0075] The first circuit board 22 in the present application comprises the body portion 21 and the first circuit 22, along the thickness direction A of the body portion 21, the body portion 21 comprises the first side wall 211 and the second side wall 212, the first circuit 22 is arranged on the first side wall 211, the first circuit 22 has 7 parallel circuits, each parallel circuit has 6 resistors connected in series, and each resistor is connected by a copper sheet. The first positive plate 31 is a copper sheet and is connected to the input end of the first circuit 22, the first connecting portion 222 is the output end of the first circuit 22, and the first connecting portion 222 is also a copper sheet. The body portion 21 is provided with a first hole 210 penetrating through the first side wall 211 and the second side wall 212, and the first hole 210 is a threaded hole with a hole diameter of 3mm, and the conductive part 23 is an M3 screw, the screw nut of the screw is connected with the first connecting portion 222, and the screw nut is used to form a loop on the first circuit board 22.

[0076] The filter X capacitor 24 and the filter Y capacitor 25 are arranged on the second side wall 212 according to the required frequency band, and the first negative plate 41 is arranged on the second side wall 212, and the first negative plate 41 is a copper sheet. The metal connecting part 6 is injection molded in the shell 1, when the first circuit board 22 is installed in the shell 1, the second connecting portion of the first negative plate 41 is clamped between the second side wall 212 and the metal connecting part 6. The metal connecting part 6 has a threaded hole matched with the conductive part 23. The metal connecting part 6 can make the first negative plate 41 fully contact with the conductive part 23, and improve the stability of the conduction.

[0077] The second positive plate 32 and the second negative plate 42 can be copper bars, the second positive plate 32 is connected with the first positive plate 31, the second negative plate 42 is connected with the first negative plate 41, the second circuit is connected between the second positive plate 32 and the second negative plate 42, the second circuit board 53 is connected between the second positive plate 32 and the second negative plate 42, and the first circuit board 22 is connected between the second positive plate 32 and the second negative plate 42, so that the second circuit, the first circuit board 22 and the second circuit board 53 form a parallel circuit.

[0078] Screwing the conductive part 23 to move the conductive part 23 towards the direction away from the metal connecting part 6, when the conductive part 23 is separated from the metal connecting part 6 and the second connecting part, the conductive part 23 and the second connecting part are disconnected, which can be used to test the insulation resistance of the second circuit and the second circuit board 53 in parallel; screwing the conductive part 23 to move the conductive part 23 towards the direction close to the metal connecting part 6, when the conductive part 23 is screwed to the metal connecting part 6, the conductive part 23 and the second connecting part are connected, which can be used to test the insulation resistance between the poles of the entire filter assembly after the first circuit board 22, the second circuit board 53 and the second circuit are connected in parallel. That is, the communication or disconnection of the conductive part 23 and the second connecting part can be adjusted by mechanically controlling the movement of the conductive part 23, so as to realize the test of the insulation resistance of different parts in the filter assembly, achieve the purpose of optimizing the design method, and further improve the pass rate of the test of the insulation resistance between the poles of the filter assembly with the function of discharge.

[0079] It should also be noted that the terms "comprising", "containing", or any other similar term are intended to encompass non-exclusive inclusions, such that a process, method, article or apparatus that comprises a list of elements does not necessarily include only those elements, but can include other elements not expressly listed or inherent to such process, method, article or apparatus. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising the element.

[0080] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiment.

[0081] The above only describes the embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

[0082] Although the embodiments of the present application are described in conjunction with the drawings, those skilled in the art can make various modifications and changes without departing from the spirit and scope of the present application, and such modifications and changes shall fall within the scope defined by the appended claims.

Claims

1. A filter assembly comprising: The application relates to a circuit board and a shell. The circuit board comprises a first circuit board (2) and a filter (5), the first circuit board (2) comprises a body part (21) and a first circuit (22), the body part (21) has a first sidewall (211) and a second sidewall (212) oppositely arranged along the thickness direction (A) of the body part (21), the first circuit (22) is arranged on the first sidewall (211), and the body part (21) has a first hole (210) penetrating through the first sidewall (211) and the second sidewall (212); A first positive pole part (3) is connected to the first sidewall (211), and a first negative pole part (4) is connected to the second sidewall (212), the first positive pole part (3) is connected to the input end of the first circuit (22); The filter (5) is connected between the first positive pole part (3) and the first negative pole part (4), and the filter (5) is connected in parallel with the first circuit board (2); The first circuit board (2) further comprises a conductive part (23), the conductive part (23) is arranged in the first hole (210) and selectively connected to the output end of the first circuit (22) and the first negative pole part (4).

2. The filter assembly of claim 1, wherein, The conductive part (23) comprises a first part (231) and a second part (232), the first part (231) is connected to one end of the second part (232) along the axial direction of the first hole (210), and the first part (231) protrudes from the outer peripheral surface of the second part (232) along the radial direction of the first hole (210), The first part (231) is used for being connected to the output end of the first circuit (22), and the second part (232) is used for being selectively connected to the first negative pole part (4).

3. The filter assembly of claim 2, wherein, The shell (1) is further provided with the first circuit board (2) and the filter (5), the first positive pole part (3) comprises a first positive pole sheet (31) and a second positive pole sheet (32), the first positive pole sheet (31) is arranged on the first sidewall (211) and connected to the input end of the first circuit (22), and the second positive pole sheet (32) is connected to the first positive pole sheet (31) and extends out of the shell (1); The first negative pole part (4) comprises a first negative pole sheet (41) and a second negative pole sheet (42), the first negative pole sheet (41) is arranged on the second sidewall (212) and selectively connected to the output end of the first circuit (22) through the conductive part (23), and the second negative pole sheet (42) is connected to the first negative pole sheet (41) and extends out of the shell (1).

4. The filter assembly of claim 3, wherein, The first circuit (22) comprises a circuit body (221) and a first connecting portion (222) connected in sequence, the circuit body (221) is connected with the first positive plate (31), the first connecting portion (222) is connected with the first portion (231), and the ratio of the projection area of the first connecting portion (222) to the projection area of the first portion (231) along the thickness direction (A) of the body portion (21) is a, and the following condition is met: 1≤a≤2.

5. The filter assembly of claim 3, wherein, The conductive member (23) is configured as a first screw, and the first screw is threadedly matched with the first hole (210).

6. The filter assembly of claim 3, wherein, The first circuit board (2) further comprises a metal connecting member (6) arranged in the shell (1), the first negative plate (41) comprises a second connecting portion, the second connecting portion is clamped between the metal connecting member (6) and the second side wall (212), and the conductive member (23) is selectively connected with the second connecting portion.

7. The filter assembly of claim 6, wherein, The conductive member (23) is configured as a second screw, and the metal connecting member (6) has a second hole, and the second screw is threadedly matched with the second hole.

8. The filter assembly of claim 3, wherein, The filter portion (5) comprises a first ferrite core (51), a second ferrite core, a nanocrystalline magnetic core (52) and a second circuit board (53) arranged in the shell (1), the first ferrite core (51), the second ferrite core and the nanocrystalline magnetic core (52) are connected in series between the second positive plate (32) and the second negative plate (42) to form a second circuit, and the second circuit, the first circuit board (2) and the second circuit board (53) are connected in parallel.

9. The filter assembly of claim 3, wherein, The first circuit board (2) further comprises an X capacitor (24) and a Y capacitor (25), the X capacitor (24) is connected between the first positive plate (31) and the first negative plate (41), and the Y capacitor (25) is connected between the first positive plate (31) and the first negative plate (41).

10. The filter assembly of claim 1, wherein, The first circuit (22) comprises a plurality of parallel circuits, and each parallel circuit comprises a plurality of resistors connected in series with each other.

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