U-shaped high-precision two-way shunt

Abstract

The utility model discloses a U-shaped high-precision double-path shunt, which relates to the technical field of electronic components and comprises a U-shaped double-path structure formed by a first red copper plate, a second red copper plate, a third red copper plate, a first manganese copper plate and a second manganese copper plate, the first manganese-copper plate and the second manganese-copper plate are respectively welded at two ends of the first red copper plate, and the second red copper plate and the third red copper plate are respectively welded at the other ends of the first manganese-copper plate and the second manganese-copper plate; according to the utility model, the bottom of the first red copper plate is flush with the top of the second red copper plate, and the top of the third red copper plate is flush with the bottom of the first red copper plate, so that the two-way diverter can be completed only by two times of welding, and the welding frequency is reduced compared with the two-way diverter in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic components, in particular to a U-shaped high-precision dual-path shunt. Background Art

[0002] The shunt is a commonly used current sampling element that can measure DC current. It is made based on the principle that voltage is generated across a resistor when DC current passes through it. When current flows through the shunt, the voltage drop across the shunt is measured to calculate the actual current flowing through the shunt.

[0003] After searching, a Chinese patent application, an invention patent with publication number CN116487133A, discloses a high-precision dual-path shunt, including a first copper plate, a first manganese copper plate fixedly connected to one side of the first copper plate, a second copper plate fixedly connected to the side of the first manganese copper plate away from the first copper plate, a second manganese copper plate fixedly connected to the side of the second copper plate away from the first manganese copper plate, a third copper plate fixedly connected to the side of the second manganese copper plate away from the second copper plate, two first test pins are provided on one side of the first manganese copper plate, and two second test pins are provided on one side of the second manganese copper plate. The present invention can effectively improve the heat dissipation capacity of the first manganese copper plate and the second manganese copper plate and reduce the test error by arranging the first manganese copper plate and the second manganese copper plate, and at the same time, by arranging multiple groups of detection pins, the anti-interference ability of the shunt is improved, so that the current detection result of the shunt is more accurate.

[0004] However, in the above patent application, a structure of copper-manganese copper-copper-manganese copper-copper is adopted, and they are welded together in pairs, which requires four welding times, and the welding times are large and the operation is cumbersome. Therefore, the utility model provides a U-shaped high-precision dual-path shunt. Utility Model Content

[0005] The technical problem solved by the utility model is that the existing two-way shunt adopts the structure of copper-manganese copper-copper-manganese copper-copper, which are welded together in pairs, and four weldings are required, the welding times are large, and the operation is cumbersome.

[0006] The utility model can be implemented through the following technical scheme: a U-shaped high-precision two-way shunt, including a U-shaped two-way structure composed of a first copper plate, a second copper plate, a third copper plate, a first manganese copper plate and a second manganese copper plate, wherein the first copper plate is an asymmetric U-shape, the first manganese copper plate and the second manganese copper plate are respectively welded to the two ends of the first copper plate, and the second copper plate and the third copper plate are respectively welded to the other ends of the first manganese copper plate and the second manganese copper plate.

[0007] A further technical improvement of the utility model is that the widths of the two ends of the first copper plate are not equal.

[0008] A further technical improvement of the utility model is that: the second copper plate is provided with an assembly hole, and the third copper plate is also provided with an assembly hole.

[0009] A further technical improvement of the utility model is that a rounded corner is arranged on a side of the second copper plate away from the first manganese copper plate.

[0010] A further technical improvement of the utility model is that a side of the third copper plate away from the second manganese copper plate is also provided with a rounded corner.

[0011] A further technical improvement of the utility model is that a rounded corner is arranged on a side of the first copper plate away from the first manganese copper plate and the second manganese copper plate.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. In the utility model, after welding, the two-way shunt only needs two welding operations to be completed, because the bottom of the first copper plate is flush, and the tops of the second copper plate and the third copper plate are also flush. Compared with the two-way shunt in the prior art, the number of welding times is reduced.

[0014] 2. In the utility model, the dual-path structure can satisfy the voltage sampling and realize the self-diagnosis function at the same time. When the first manganese copper plate is used for voltage sampling, the second manganese copper plate is used for self-diagnosis; conversely, when the second manganese copper plate is used for voltage sampling, the first manganese copper plate can also be used for self-diagnosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0017] Figure 2 This is a circuit diagram for self-diagnosis in the utility model.

[0018] In the figure: 1. first copper plate; 2. second copper plate; 3. third copper plate; 4. first manganese copper plate; 5. second manganese copper plate; 6. assembly hole; 7. fillet; 8. first millivoltmeter; 9. second millivoltmeter. DETAILED DESCRIPTION

[0019] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0020] See also Figure 1-Figure 2 As shown, a U-shaped high-precision two-way shunt includes a U-shaped two-way structure composed of a first copper plate 1, a second copper plate 2, a third copper plate 3, a first manganese copper plate 4 and a second manganese copper plate 5. The widths of the two ends of the first copper plate 1 are not equal, so that the first copper plate 1 is an asymmetric U-shape, the first manganese copper plate 4 and the second manganese copper plate 5 are respectively welded to the two ends of the first copper plate 1, and the second copper plate 2 and the third copper plate 3 are respectively welded to the other ends of the first manganese copper plate 4 and the second manganese copper plate 5; in the above, according to user needs, the first manganese copper plate 4 and the second manganese copper plate 5 of appropriate thickness and width are selected, and the first manganese copper plate 4 and the second manganese copper plate 5 are welded to the two ends of the first copper plate 1; the above welding methods are all electron beam welding; the whole shunt can be regarded as composed of each copper plate and manganese copper plate connected in series, and the overall resistance value is the sum of the resistance values ​​of each part of the copper plate and the manganese copper plate;

[0021] After welding, the two-way shunt only needs two welding operations to be completed, because the bottom of the first copper plate 1 is flush, and the tops of the second copper plate 2 and the third copper plate 3 are also flush. Compared with the two-way shunt in the prior art, the number of welding times is reduced.

[0022] In the above, the second copper plate 2 is provided with an assembly hole 6, and the third copper plate 3 is also provided with an assembly hole 6. The current is input from one of the assembly holes 6 and then output from the other assembly hole 6; the second copper plate 2 is provided with a rounded corner 7 on the side away from the first manganese copper plate 4; the third copper plate 3 is also provided with a rounded corner 7 on the side away from the second manganese copper plate 5; the first copper plate 1 is provided with a rounded corner 7 on the side away from the first manganese copper plate 4 and the second manganese copper plate 5.

[0023] On the surfaces of the first copper plate 1 and the second copper plate 2, a PCBA is welded directly above the first manganese copper plate 4 for sampling; on the surfaces of the first copper plate 1 and the third copper plate 3, a PCBA is welded directly above the second manganese copper plate 5 for sampling;

[0024] The dual-path structure can satisfy the voltage sampling and realize the self-diagnosis function at the same time. When the first manganese copper plate 4 is used for voltage sampling, the second manganese copper plate 5 is used for self-diagnosis; conversely, when the second manganese copper plate 5 is used for voltage sampling, the first manganese copper plate 4 can also be used for self-diagnosis.

[0025] Copper is an alloy containing copper and zinc, usually containing 70-90% copper and 10-30% zinc. It has good mechanical properties and corrosion resistance, so it is widely used to manufacture various parts and devices; the advantages of copper include high strength, corrosion resistance, good electrical conductivity, easy processing and molding, etc. The preparation method of copper usually includes the following steps: a. Raw material preparation: prepare enough pure copper and zinc, usually in the form of blocks or powder. b. Mixing: Mix the appropriate amount of pure copper and zinc in proportion to ensure the accuracy of the alloy composition. c. Melting: Put the mixed copper and zinc into the furnace for melting, heat to the temperature required for the alloy composition, and make the two metals completely melt and mix. d. Casting: Pour the molten alloy into the mold, and after cooling and solidification, obtain the copper alloy billet of the desired shape. e. Processing: The alloy billet is mechanically processed, such as forging, rolling, milling, etc., to obtain the final copper product.

[0026] Manganese copper is a copper alloy containing manganese, usually containing about 1-11% manganese. It has high strength, hardness and wear resistance, and has good corrosion resistance. The advantages of manganese copper include high strength, hardness and wear resistance, and have good corrosion resistance. The preparation method of manganese copper generally includes the following steps: a. Raw material preparation: Prepare enough pure copper and manganese, usually in the form of blocks or powder. b. Mixing: Mix the appropriate amount of pure copper and manganese in proportion to ensure the accuracy of the alloy composition. c. Melting: Put the mixed copper and manganese into the furnace for melting, heat to the temperature required for the alloy composition, and make the two metals completely melt and mix. d. Casting: Pour the molten alloy into the mold, and after cooling and solidification, obtain the manganese copper alloy billet of the desired shape. e. Processing: The alloy billet is mechanically processed, such as forging, rolling, milling, etc., to obtain the final manganese copper product.

[0027] When in use, the first millivoltmeter 8 and the second millivoltmeter 9 are connected to the first manganese copper plate 4 and the second manganese copper plate 5 respectively. When the switch SW is closed, the current flows from the second copper plate 2 through the first manganese copper plate 4 (R1), the first copper plate 1, the second manganese copper plate 5 (R2), and the third copper plate 3 in sequence to form a closed loop. When the first millivoltmeter 8 has a reading and normally displays the voltage across the first manganese copper plate 4, and the second millivoltmeter 9 has no display, it means that the second millivoltmeter 9 has a fault; when the first millivoltmeter 8 has a reading and normally displays the voltage across the first manganese copper plate 4, and the second millivoltmeter 9 displays a value that is not in the normal range of the voltage across the second manganese copper plate 5, it means that the connection of the sampling point here is abnormal; when both the first millivoltmeter 8 and the second millivoltmeter 9 have no display, it is a system abnormality, thereby achieving fault location at a lower-level component level.

[0028] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, as well as a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present utility model. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A U-shaped high-precision dual-way shunt, Features: The invention comprises a U-shaped double-path structure composed of a first copper plate (1), a second copper plate (2), a third copper plate (3), a first manganese copper plate (4) and a second manganese copper plate (5), wherein the first copper plate (1) is in an asymmetric U-shape, the first manganese copper plate (4) and the second manganese copper plate (5) are respectively welded to the two ends of the first copper plate (1), and the second copper plate (2) and the third copper plate (3) are respectively welded to the other ends of the first manganese copper plate (4) and the second manganese copper plate (5).

2. A U-shaped high-precision dual-way shunt according to claim 1, It is characterized in that The widths of the two ends of the first copper plate (1) are unequal.

3. A U-shaped high-precision dual-way shunt according to claim 1 or 2, It is characterized in that The second copper plate (2) is provided with an assembly hole (6), and the third copper plate (3) is also provided with an assembly hole (6).

4. A U-shaped high-precision dual-path shunt according to claim 1, It is characterized in that A rounded corner (7) is provided on a side of the second copper plate (2) away from the first manganese copper plate (4).

5. A U-shaped high-precision dual-path shunt according to claim 1, It is characterized in that A rounded corner (7) is also provided on the side of the third copper plate (3) away from the second manganese copper plate (5).

6. A U-shaped high-precision dual-path shunt according to claim 1, It is characterized in that A rounded corner (7) is provided on a side of the first copper plate (1) away from the first manganese copper plate (4) and the second manganese copper plate (5).

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