Printed circuit board (PCB) with flat bus bar packaging bonding pad design
By designing packaged pads and screws to fix the busbar on the PCB board, the problem of difficult installation of traditional busbars is solved, achieving stable connection and simplifying the production process. This design is suitable for the packaged pads of flat busbars in complex circuits.
Patent Information
- Application Number
- CN202422874104.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-25
AI Technical Summary
When traditional flat busbars are installed on PCBs, space constraints prevent the use of fixtures for protection, leading to poor soldering, increased labor costs and production difficulties, and discontinuous power lines affecting electrical performance.
Design a flat busbar package pad, which fixes the busbar by setting the package pad and screws on the PCB board, and using bent feet and through holes, and performs wave soldering directly, avoiding the SMT assembly process.
It simplifies production processes, improves production efficiency, reduces the difficulty of R&D and design, achieves stable connection between busbars and PCB boards, solves soldering problems, and is suitable for complex circuit designs.
Smart Images
Figure CN223567850U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to PCB board technical field especially relates to a kind of PCB circuit board of flat busbar package pad design. BACKGROUND
[0002] Flat busbar is often used in electronic industry to be attached on PCB board, which plays a dual role of carrying large current and heat conduction. In the traditional process, the busbar is welded by using tin paste process and reflow soldering. If it is placed on the soldering surface of the PCB board for wave soldering, the fixture needs to be used to shield and protect the surface-mounted busbar to avoid the busbar from falling due to high temperature. However, for some high-power-density circuits, due to the limitation of PCB space, there is no space for the design of the PCB to install the fixture to protect the busbar, which leads to difficulties in production and problems such as poor welding of devices (such as wrapped welding, empty welding, and false welding). Although subsequent manual welding can be added, the welding effect is not ideal, which increases labor costs and time costs and cannot completely avoid quality risks. In general, in the existing scheme, the installation of flat busbars needs to be done by SMT surface mounting. If it is installed on the soldering surface of the PCB board, the fixture needs to be used to protect it from falling during the wave soldering process in the subsequent process, which increases the cost of the fixture. When the space of the PCB is limited, the irregular flat busbar cannot be automatically surface mounted by SMT, and manual placement seriously affects the efficiency of surface mounting and increases production costs. The conventional flat busbar is attached in sections, and the power circuit is not continuous, which causes local heating of the circuit and affects the electrical performance indicators of the product, such as output efficiency.
[0003] Therefore, it is necessary to provide a PCB circuit board with flat busbar package pad design, which can make the busbar skip the SMT mounting process and be directly wave soldered to solve the related problems. SUMMARY
[0004] The utility model discloses a kind of PCB circuit boards with flat busbar package pad design, it is related to power industry, for flexible installation connection PCB board of busbar, it can effectively solve the technical problems involved in background technology.
[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:
[0006] A PCB circuit board with flat busbar package pad design includes a PCB board, a package pad, a busbar, and a screw. The package pad is installed on the PCB board. The busbar includes a busbar body, which has a bent leg and a through hole. The package pad has a package pad hole corresponding to the position of the bent leg and a fixing hole corresponding to the position of the through hole. The screw fixes the busbar on the PCB board through the through hole, and the bent leg is welded to the package pad hole. The screw is a self-tapping screw.
[0007] As a preferred improvement of the utility model: the PCB board is provided with mounting holes corresponding to the positions of the packaging solder holes and the fixing holes.
[0008] As a preferred improvement of the utility model: the packaging solder hole is a runway type.
[0009] As a preferred improvement of the utility model: the screw model is M2.
[0010] As a preferred improvement of the utility model: the busbar body periphery is welded with the packaging solder pad.
[0011] As a preferred improvement of the utility model: the number of the bending feet and the through holes is multiple.
[0012] As a preferred improvement of the utility model: the busbar body thickness is 0.8-2mm.
[0013] As a preferred improvement of the utility model: the size of the packaging solder pad is greater than the size of the busbar body.
[0014] As a preferred improvement of the utility model: the busbar body is provided with a slot for mounting other devices.
[0015] The utility model has the beneficial effects as follows:
[0016] The utility model provides a PCB board of flat plate busbar packaging solder pad design, reduces the difficulty of research and development design, improves power supply reliability, reduces design period and simplifies production procedure, improves production efficiency, and is used for the design method of flat plate busbar of wave soldering and corresponding PCB board solder pad, and the flat plate busbar does not need to pass through SMT link, the flat plate busbar is opened through hole, is fixed on the PCB board through self -tapping screw, is closely attached after installation, can directly wave soldering, and production flow is simple and convenient, and the busbar design is flexible, is suitable for various complex circuits, and power circuit can be directly connected, solves the problem of discontinuous power circuit of segmented mounting of commonly used busbar. DRAWINGS
[0017] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating creative labor, wherein:
[0018] Figure 1 It is the schematic diagram of the PCB circuit board of flat plate busbar packaging solder pad design of the utility model;
[0019] Figure 2 The utility model discloses a busbar structure schematic diagram;
[0020] Figure 3 The utility model discloses a busbar size schematic diagram;
[0021] Figure 4 The utility model discloses a welding hole size schematic diagram;
[0022] Figure 5 The utility model discloses a PCB board structure schematic diagram;
[0023] Figure 6 The utility model discloses a package pad structure schematic diagram.
[0024] In the drawing: 1-PCB board, 2-package pad, 3-busbar, 301-busbar body, 302-bending foot, 303-through hole, 304-slotted, 4-screw. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0026] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.
[0027] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0028] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium, can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. 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.
[0029] In addition, the technical solutions among various embodiments of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.
[0030] Please refer to Figures 1-6 The utility model provides a kind of PCB circuit board of flat plate busbar packaging pad design, including PCB board 1, packaging pad 2, busbar 3 and screw 4, the packaging pad 2 is installed on the PCB board 1, the busbar 3 includes busbar body 301, the busbar body 301 is equipped with bending leg 302 and through hole 303, the packaging pad 2 is equipped with packaging hole in the position corresponding the bending leg 302, the packaging pad 2 is equipped with fixed hole in the position corresponding the through hole 303, the screw 4 passes through the fixed hole and fixes the packaging pad 2 and the busbar 3, the bending leg 302 is welded in the packaging hole.The PCB board 1 is equipped with mounting hole in the position corresponding the packaging hole and the fixed hole, and the screw 4 is screwed with the PCB board 1.The packaging hole is racetrack type, the screw 4 is self-tapping screw, the busbar body 301 periphery is welded with the packaging pad 2, and the busbar body 301 is equipped with slot 304 for mounting other devices. Figure 1 In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium, can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. 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.
[0031] A PCB board with a flat busbar and a corresponding busbar packaging pad design is proposed to solve the PCB design and production problems of high power density circuits. The flat busbar is provided with a bending leg and a through hole. Compared with the conventional one-dimensional flat busbar design, the bending leg can be at any position, any number, and any size. The through hole can be at any position, any number, and any size on the busbar. The thickness of the flat busbar design can be any value (for the convenience of production and bending, the thickness range is generally set to 0.8-2mm). The length of the bending leg of the flat busbar design can not exceed the thickness of the board, which does not affect the placement and installation of the plug-in device and does not occupy the PCB design space. The use of the designed busbar can be flatly attached to the PCB, prevent deviation, prevent falling, firm welding, stable electrical properties, convenient research and development design, and simple production operation. Preferably, the number of the bending leg 302 and the through hole 303 is multiple (2-4), the thickness of the busbar body 301 is 0.8-2mm, and the size of the packaging pad 2 is larger than the size of the busbar body 301.
[0032] Embodiment one
[0033] The busbar is provided with a bending leg and a through hole. The busbar can be in any shape in the 2D plane, and is used for the installation and fixation of the busbar. The slot is used to avoid different network connections and prevent circuit short circuit.
[0034] As Figure 3 , the size of the busbar bending leg is long*wide=a*b, the length of the bending leg is c=1.5mm (or other values, which can not exceed the thickness of the PCB), and the through hole of the busbar is d=2.1mm (or other values, which are determined according to the fixed screw type).
[0035] According to the busbar of the present application, the busbar bending leg and the through hole need to be increased in the corresponding position of the PCB board design to open the bending leg runway type welding hole and the through hole, which are used for the installation and fixation of the busbar.
[0036] As Figure 4 , the PCB board with the corresponding packaging pad design of the busbar needs to open the runway type drilling hole. The hole diameter and the bending leg size are related as follows: L=a+0.5mm (or other values), H=b+0.3mm (or other values), wherein the width of the pad welding ring is 1.5 times (or other values) the drilling size in the corresponding direction.
[0037] As Figure 5 , according to the through hole on the busbar, the hole diameter of the PCB board with the corresponding packaging pad design is required as follows: D=d (2.1mm or other values)-0.5mm (or other values).
[0038] As Figure 6According to the shape of the busbar, the relationship of the pad setting on the PCB board of the corresponding packaging design is as follows: PCB packaging pad = each side of the busbar body outer frame + 0.5mm (or other values).
[0039] The busbar is fixed on the PCB board by using self-tapping screws of model M2 (or other) according to the busbar and the fixing screws of the corresponding packaging design of the PCB board.
[0040] Working principle: the bending foot 302 is inserted into the solder hole of the PCB board 1 and the packaging pad 2, the through hole 303 corresponds to the mounting hole of the PCB board 1 and the fixing hole of the packaging pad 2, the screw 4 is installed, the busbar 3 is fixed on the PCB board 1, and then welding is carried out.
[0041] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein.
Claims
1. A PCB circuit board with a flat busbar encapsulation pad design, characterized in that: The device includes a PCB board (1), a package pad (2), a busbar (3), and a screw (4). The package pad (2) is mounted on the PCB board (1). The busbar (3) includes a busbar body (301), which has a bent leg (302) and a through hole (303). The package pad (2) has a package solder hole corresponding to the bent leg (302). The package pad (2) has a fixing hole corresponding to the through hole (303). The screw (4) fixes the busbar (3) to the PCB board (1) through the through hole (303). The bent leg (302) is welded to the package solder hole. The screw (4) is a self-tapping screw.
2. The PCB circuit board with a flat busbar encapsulation pad design according to claim 1, characterized in that: The PCB board (1) has mounting holes at the positions corresponding to the encapsulation solder holes and the fixing holes.
3. The PCB circuit board with a flat busbar encapsulation pad design according to claim 1, characterized in that: The encapsulation solder hole is racetrack shaped.
4. The PCB circuit board with a flat busbar encapsulation pad design according to claim 1, characterized in that: The screw (4) is of model M2.
5. The PCB circuit board with a flat busbar encapsulation pad design according to claim 1, characterized in that: The busbar body (301) is welded to the periphery of the encapsulation pad (2).
6. The PCB circuit board with a flat busbar encapsulation pad design according to claim 1, characterized in that: The number of the bent feet (302) and the through holes (303) is multiple.
7. The PCB circuit board with a flat busbar encapsulation pad design according to claim 1, characterized in that: The thickness of the busbar body (301) is 0.8-2mm.
8. The PCB circuit board with a flat busbar encapsulation pad design according to claim 1, characterized in that: The size of the encapsulation pad (2) is larger than the size of the busbar body (301).
9. The PCB circuit board with a flat busbar encapsulation pad design according to claim 1, characterized in that: The busbar body (301) is provided with a slot (304) for mounting other devices.