Electric device, electric driving system and vehicle
By welding the connection ends of the conductive connection columns in the mounting holes of the circuit board, the problems of unstable connection and stress concentration of the circuit board are solved, stable connections and efficient use of space are achieved, and the miniaturization of electrical devices is promoted.
Patent Information
- Application Number
- CN202421940504.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-09
AI Technical Summary
In the prior art, screw connections between circuit boards are prone to wear of screw teeth, resulting in unstable conductive connections, and stress concentration is generated near threaded holes of circuit boards, affecting the miniaturization of electrical devices and space utilization.
The first and second connection ends of the conductive connecting column are soldered into the mounting holes of the first and second circuit boards, respectively, to avoid stress concentration, and to facilitate assembly and integration of electronic devices through the intermediate section design, and to achieve stable connections by welding.
Long-term and stable connections between circuit boards are achieved, stress concentration is avoided, circuit board space is maximized, and electrical devices are miniaturized and more electronic devices are integrated.
Smart Images
Figure CN223093140U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an electrical device, an electric drive system including such an electrical device, and a vehicle including such an electrical device or such an electric drive system. Background Art
[0002] The requirement for miniaturization of electrical devices, such as electric drive systems for vehicles, is becoming increasingly urgent, for example, to adapt to the lightweight development of vehicles, especially electric vehicles or hybrid vehicles. Such an electrical device may include two circuit boards that face each other and are electrically connected to each other. In the prior art, conductive connection posts, such as copper posts, are usually used to achieve the connection between such two circuit boards, and at least one end of the copper post in the prior art is electrically connected to one of the two circuit boards via a screw connection. The screw connection has several technical problems. The threaded holes on the circuit board are prone to thread wear, thus damaging the stable connection between the conductive connection post and the circuit board. In addition, the screw connection will generate stress concentration in the area near the threaded holes of the circuit board, and the stress concentration will damage the performance of the circuit board. More specifically, electronic devices cannot be arranged in the stress concentration area, resulting in space waste and being not conducive to product miniaturization.
[0003] Therefore, there is still a need for a completely new solution that can overcome the problems in the prior art. Summary of the Utility Model
[0004] For this purpose, according to one aspect of the utility model, an electrical device is proposed. According to one embodiment, the electrical device may include:
[0005] A first circuit board, provided with a first mounting hole, and including a first outer surface and a first inner surface that are opposite to each other;
[0006] A second circuit board, provided with a second mounting hole, and including a second outer surface and a second inner surface that are opposite to each other;
[0007] A conductive connection post, including a first connection end and a second connection end;
[0008] Wherein: the first circuit board and the second circuit board are arranged such that the first inner surface and the second inner surface face each other; the first connection end of the conductive connection post is inserted into the first mounting hole and is welded to the first circuit board at the first mounting hole; the second connection end of the conductive connection post is inserted into the second mounting hole and is welded to the second circuit board at the second mounting hole.
[0009] Thus, both the first connection end and the second connection end of the conductive connection post are connected to the corresponding one of the first circuit board and the second circuit board via soldering, which helps to achieve a long-term stable connection between each circuit board and the conductive connection post and does not generate stress concentration areas. Therefore, required electronic devices can be arranged on the first circuit board and the second circuit board, near or around the first mounting hole and the second mounting hole, maximizing the use of the space on the circuit board and contributing to the realization of a miniaturized structure.
[0010] According to various embodiments, the electrical device of the present disclosure may further include one or more of the following further developments.
[0011] In some embodiments, the conductive connection post further includes an intermediate section disposed between the first connection end and the second connection end, and the intermediate section is formed as a widened section with respect to the first connection end and / or the second connection end. This arrangement facilitates the assembly of the conductive connection post with the first circuit board and the second circuit board.
[0012] In some embodiments, the diameter of the intermediate section is greater than the diameter of the first connection end and / or the diameter of the second connection end.
[0013] In some embodiments, the first connection end is soldered to the first circuit board by reflow soldering; the second connection end is soldered to the second circuit board by wave soldering.
[0014] In some embodiments, the first connection end does not protrude from the first outer surface; and / or the second connection end protrudes from the second outer surface.
[0015] In some embodiments, a gap is provided between the intermediate section and the first inner surface and / or the second inner surface. This gap allows avoiding hard contact between the intermediate section of the conductive connection post and the first circuit board and / or the second circuit board, especially in the case of machining errors or assembly errors.
[0016] In some embodiments, the size of the gap is 0.2 mm to 0.5 mm.
[0017] In some embodiments, the diameter of the first mounting hole is greater than the diameter of the first connection end; and / or the diameter of the second mounting hole is greater than the diameter of the second connection end. Such an arrangement allows the conductive connection post to still be inserted into the corresponding first mounting hole and second mounting hole in the case of machining errors or assembly errors.
[0018] Another aspect of the present utility model relates to an electric drive system, which may include the electrical device according to any one of the above embodiments and thus includes corresponding advantages and benefits.
[0019] Another aspect of the present utility model relates to a vehicle, which may include the electrical device according to any one of the above embodiments, or include the electric drive system as described above. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts. In the drawings:
[0021] Figure 1 The electrical device according to an exemplary embodiment is schematically shown in a perspective exploded view;
[0022] Figure 2 The first circuit board and the second circuit board of the electrical device according to an exemplary embodiment are schematically shown connected to each other via an intermediate connection post in a plan view;
[0023] Figure 3 The first circuit board and the second circuit board are schematically shown connected to each other via an intermediate connection post in a partial cross-sectional view.
[0024] LIST OF REFERENCE NUMERALS
[0025] 10 Electrical device
[0026] 100 First circuit board
[0027] 110 First outer surface
[0028] 120 First inner surface
[0029] 150 First mounting hole
[0030] 200 Second circuit board
[0031] 210 Second outer surface
[0032] 220 Second inner surface
[0033] 250 Second mounting hole
[0034] 300 Conductive connection post
[0035] 310 First connection end
[0036] 320 Second connection end
[0037] 330 Intermediate section
[0038] 400 Heat dissipation device DETAILED DESCRIPTION
[0039] Next, an electrical device, an electric drive system, and a vehicle according to embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. To make the objectives, technical solutions, and advantages of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are some, but not all, of the embodiments of the present disclosure.
[0040] Therefore, the following detailed description of the embodiments of the present disclosure provided in conjunction with the accompanying drawings is not intended to limit the scope of the present disclosure claimed, but merely represents selected embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts fall within the scope of protection of the present disclosure.
[0041] Unless otherwise defined in the context, the singular forms include the plural forms. Throughout the specification, terms such as "including", "having", etc. are used herein to specify the presence of the described features, numbers, steps, operations, elements, components, or combinations thereof, but do not exclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof.
[0042] In addition, even though ordinal terms such as "first", "second", etc. may be used to describe various components, these components are not limited by these terms, and these terms are only used to distinguish one element from other elements. For example, without departing from the scope of the present disclosure, the first component may be referred to as the second component, and similarly, the second component may be referred to as the first component.
[0043] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the disclosed product is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present disclosure.
[0044] As Figures 1-3As shown, one aspect of the present utility model relates to an electrical device 10. In an exemplary application environment, the electrical device 10 is part of a power module or an electric drive system, such as part of an on-vehicle power module or an electric drive system of an electric vehicle or a hybrid vehicle. It should be understood that the on-vehicle power module can be used to charge an energy storage device (e.g., a battery or a supercapacitor outside the on-vehicle power module). It can receive filtered alternating current input from the outside (e.g., an external charging pile or charging device), rectify and transform it into direct current, and then deliver it to a load or an energy storage device for charging. After the on-vehicle power module charges the energy storage device, the power conversion circuit generates driving power based on the power from the energy storage device to drive the motor to rotate.
[0045] According to one embodiment, the electrical device 10 may include a first circuit board 100, a second circuit board 200, and a conductive connection post 300. The first circuit board 100 is provided with a first mounting hole 150 and includes an outer surface and an inner surface opposite to each other, hereinafter referred to as the first outer surface 110 and the first inner surface 120 respectively. The second circuit board 200 is provided with a second mounting hole 250 and includes an outer surface and an inner surface opposite to each other, hereinafter referred to as the second outer surface 210 and the second inner surface 220 respectively. Among them, the first inner surface 120 of the first circuit board 100 and the second inner surface 220 of the second circuit board 200 are arranged opposite to each other. The conductive connection post 300 includes a first connection end 310 and a second connection end 320. More specifically, the first connection end 310 and the second connection end 320 are respectively arranged at two opposite ends of the conductive connection post 300. The first connection end 310 of the conductive connection post 300 is inserted into the first mounting hole 150 and is welded to the first circuit board 100 at the first mounting hole 150; the second connection end 320 of the conductive connection post 300 is inserted into the second mounting hole 250 and is welded to the second circuit board 200 at the second mounting hole 250. In a specific implementation manner, the conductive connection post 300 is a copper post, and optionally has a tin plating on its outer surface.
[0046] Thus, both the first connection end 310 and the second connection end 320 of the conductive connection post 300 are welded to the corresponding one of the first circuit board 100 and the second circuit board 200, which helps to achieve a long-term stable connection between each circuit board and the conductive connection post 300, and no stress concentration area will be generated. Therefore, required electronic devices can be arranged on the first circuit board 100 and the second circuit board 200, near or around the first mounting hole 150 and the second mounting hole 250, making the most of the space on the circuit board and helping to achieve a miniaturized structure.
[0047] In some embodiments, as Figures 1-3As shown, the conductive connection post 300 further includes an intermediate section 330 disposed between the first connection end 310 and the second connection end 320. The intermediate section 330 is formed as a widened section with respect to the first connection end 310 and / or the second connection end 320. This arrangement facilitates the assembly of the conductive connection post 300 with the first circuit board 100 and the second circuit board 200. In addition, the presence of the intermediate section 330 allows for an accommodation space between the first circuit board 100 and the second circuit board 200, and electronic components connected to the first inner surface 120 of the first circuit board 100 and / or the second inner surface 220 of the second circuit board 200 can be accommodated in this accommodation space. This allows for the integration of more functional devices on the first circuit board 100 and / or the second circuit board 200. It should be noted that various electronic components, such as surface mount devices, can be mounted on the first outer surface 110, the first inner surface 120 of the first circuit board 100, the second outer surface 210, and / or the second inner surface 220 of the second circuit board 200. In a specific embodiment, the conductive connection post 300 is cylindrical, and the diameter of the intermediate section 330 is set to be greater than the diameter of the first connection end 310 and / or the second connection end 320.
[0048] In some embodiments, the first connection end 310 of the conductive connection post 300 is soldered to the first circuit board 100 by reflow soldering. Alternatively or additionally, the second connection end 320 of the conductive connection post 300 is soldered to the second circuit board 200 by wave soldering. According to a specific embodiment, the first connection end 310 of the conductive connection post 300 and the first circuit board 100 can be soldered to each other first using reflow soldering. It should be understood that multiple surface mount devices need to be installed on the first circuit board 100, and the multiple surface mount devices and the above-mentioned first connection end 310 can be reflow soldered together, thus simplifying the process flow. Subsequently, the second connection end 320 of the conductive connection post 300 and the second circuit board 200 are soldered to each other using wave soldering. It should be understood that at this time, multiple other surface mount devices have been installed on the second circuit board 200, so wave soldering the second connection end 320 will not affect the installation of the multiple other surface mount devices and prevent the surface mount devices from falling off.
[0049] In some embodiments, as Figures 2-3 shown, the first connection end 310 of the conductive connection post 300 is arranged not to protrude beyond the first outer surface 110. This further promotes a compact structure while allowing reflow soldering. Alternatively or additionally, the second connection end 320 of the conductive connection post 300 protrudes from the second outer surface 210, which helps to form an effective wave soldering joint.
[0050] In some embodiments, a gap is provided between the middle section 330 of the conductive connection post 300 and the first inner surface 120 of the first circuit board 100 and / or the second inner surface 220 of the second circuit board 200. This gap allows avoiding hard contact between the middle section 330 of the conductive connection post 300 and the first circuit board 100 and / or the second circuit board 200, especially in the presence of machining errors or assembly errors, thereby avoiding affecting the performance of the first circuit board 100 and / or the second circuit board 200. In some embodiments, the size of this gap is set to be from 0.2 mm to 0.5 mm.
[0051] In some embodiments, as Figure 3 shown, the diameter of the first mounting hole 150 of the first circuit board 100 can be set to be greater than the diameter of the first connection end 310; and / or the diameter of the second mounting hole 250 of the second circuit board 200 can be set to be greater than the diameter of the second connection end 320. Such a setting allows the conductive connection post 300 to still be inserted into the corresponding first mounting hole 150 and second mounting hole 250 in the presence of machining errors or assembly errors.
[0052] As Figure 1 shown, according to some embodiments, the electrical device further includes a heat dissipation device 400, which can be configured to dissipate the heat generated by the electronic components on the first circuit board 100 during operation.
[0053] Another aspect of the present invention relates to an electric drive system, which may include the electrical device 10 according to any one of the above embodiments, and thus includes the corresponding advantages and benefits.
[0054] Yet another aspect of the present invention relates to a vehicle, which may include the electrical device 10 according to any one of the above embodiments, or include the electric drive system as described above. According to various embodiments, the vehicle proposed by the present invention can be an electrified vehicle, such as a battery electric vehicle (BEV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), a range extended electric vehicle, a fuel cell electric vehicle (FCEV). The vehicle can also be a hydrogen energy vehicle.
[0055] The exemplary embodiments of the electrical device, the electric drive system, and the vehicle proposed by the present utility model have been described in detail above with reference to the preferred embodiments. However, those skilled in the art can understand that, without departing from the concept of the present utility model, various modifications and variations can be made to the above specific embodiments, and various combinations of the technical features and structures proposed by the present utility model can be made without exceeding the protection scope of the present utility model.
[0056] The scope of the present disclosure is not limited by the described embodiments above, but is defined by the appended claims and their equivalent scope.
Claims
1. An electrical device (10), characterized in that, The electrical device includes: A first circuit board (100) provided with a first mounting hole (150) and including a first outer surface (110) and a first inner surface (120) opposite to each other; A second circuit board (200) provided with a second mounting hole (250) and including a second outer surface (210) and a second inner surface (220) opposite to each other; A conductive connecting post (300) including a first connecting end (310) and a second connecting end (320); Wherein: The first circuit board (100) and the second circuit board (200) are arranged such that the first inner surface (120) and the second inner surface (220) face each other; The first connecting end (310) of the conductive connecting post (300) is inserted into the first mounting hole (150) and is welded to the first circuit board (100) at the first mounting hole (150); The second connecting end (320) of the conductive connecting post (300) is inserted into the second mounting hole (250) and is welded to the second circuit board (200) at the second mounting hole (250).
2. The electrical device (10) according to claim 1, wherein The conductive connecting post (300) further includes an intermediate section (330) provided between the first connecting end (310) and the second connecting end (320), and the intermediate section (330) is formed as a widened section relative to the first connecting end (310) and / or the second connecting end (320).
3. The electrical device (10) according to claim 2, wherein The diameter of the intermediate section (330) is larger than the diameter of the first connecting end (310) and / or the second connecting end (320).
4. The electrical device (10) according to claim 3, wherein The first connecting end (310) is welded to the first circuit board (100) by reflow soldering; The second connecting end (320) is welded to the second circuit board (200) by wave soldering.
5. The electrical device (10) according to claim 4, wherein The first connecting end (310) does not protrude from the first outer surface (110); and / or The second connecting end (320) protrudes from the second outer surface (210).
6. The electrical device (10) according to any one of claims 2 to 5, wherein A gap is provided between the intermediate section (330) and the first inner surface (120) and / or the second inner surface (220).
7. The electrical device (10) according to claim 6, wherein The size of the gap is 0.2 mm to 0.5 mm.
8. The electrical device (10) according to any one of claims 1 to 5, wherein The diameter of the first mounting hole (150) is larger than the diameter of the first connecting end (310); and / or The diameter of the second mounting hole (250) is larger than the diameter of the second connecting end (320).
9. An electric drive system, characterized in that, The electric drive system comprises an electrical device (10) according to any one of claims 1 to 8.
10. A vehicle, characterized in that, The vehicle comprises an electrical device (10) according to any one of claims 1 to 8, or comprises an electric drive system according to claim 9.