shunt resistor

Abstract

The utility model discloses a shunt resistor, including alloy resistance sheet, the alloy resistance sheet both sides respectively welded setting has the terminal piece, the terminal piece is provided with the terminal hole respectively, detects the riveting hole, is provided with the rivet nut on the detection riveting hole, the terminal hole is used for connecting fixed heavy current wire, and the rivet nut is used for connecting sampling wire or sampling column. Through the terminal piece of welding in alloy resistance sheet both sides respectively, sampling thickness is bigger rectangular piece shape structure, through the terminal hole of setting up in terminal piece, detects the riveting hole, and the rivet nut is provided with on the detection riveting hole, thereby make shunt resistor can be used for super -large current and carry out detection sampling.

Description

Technical Field

[0001] This utility model relates to the field of shunt resistor manufacturing technology, and in particular to a shunt resistor. Background Technology

[0002] A shunt resistor is a resistor connected in parallel with a component or branch in a circuit. It can divide the total current in the circuit into two parts according to a certain ratio. One part passes through the component or branch connected in parallel with it, and the other part passes through itself, thereby realizing the distribution and control of the current. Shunt resistors are widely used in power systems, electronic equipment, industrial automation and other fields, providing important technical support for equipment operation monitoring and fault diagnosis. A shunt resistor is mainly composed of a resistive element and connecting parts: (1) Resistive element: Usually made of high-precision, low-temperature coefficient resistive materials, such as manganese copper alloy. These materials can ensure the stability and accuracy of the resistance value under different working conditions. The resistive element is generally in the shape of a plate or column, with a large heat dissipation area, so as to facilitate heat dissipation in time when a large current passes through, and prevent damage due to overheating. (2) Connecting parts: Includes the input and output terminals, which are used to connect the shunt resistor to the circuit. The terminals are usually made of metal materials with good conductivity, such as copper or aluminum, to ensure reliable connection with the circuit and reduce contact resistance.

[0003] With the popularization of fast charging technology for new energy, it is necessary to detect and sample ultra-high current. For application scenarios with ultra-high current, the structure of the shunt resistor needs to be further optimized. Utility Model Content

[0004] The purpose of this invention is to provide a shunt resistor that can be used for detection and sampling of ultra-high current.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: A shunt resistor includes an alloy resistance sheet and terminal pieces welded to both sides of the alloy resistance sheet. Each terminal piece has a wiring hole and a detection riveting hole, and a press-fit nut is provided on the detection riveting hole. The wiring hole is used to connect and fix a high-current wire, and the press-fit nut is used to connect a sampling wire or a sampling column.

[0006] Specifically, the alloy resistor sheet is a rectangular alloy sheet with a thickness greater than 0.8 mm.

[0007] Furthermore, the thickness of the terminal piece is greater than or equal to that of the alloy resistor piece, and the width of the terminal piece is the same as that of the alloy resistor piece.

[0008] Furthermore, the rivet nut is greater than or equal to 3.38 mm, and the inner diameter of the wiring hole is greater than the inner diameter of the detection rivet hole.

[0009] Furthermore, at least one resistance adjustment slot is provided on the side of the alloy resistor sheet.

[0010] Furthermore, one surface of the alloy resistor sheet is provided with a marking area.

[0011] Optionally, the alloy resistor sheet is provided with a positioning hole that penetrates the alloy resistor sheet.

[0012] The beneficial effects of this utility model are: By adopting the above technical solution, the shunt resistor of this utility model has a rectangular sheet structure with a relatively large sampling thickness by welding terminal pieces to both sides of the alloy resistor sheet. The terminal pieces have connection holes and detection riveting holes, with a press-fit nut installed on the detection riveting hole. The connection holes are used to connect and fix high-current wires, and the press-fit nut is used to connect sampling wires or sampling posts. This allows the shunt resistor to be used for detecting and sampling ultra-high currents. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a front view structural diagram of the shunt resistor according to an embodiment of the present utility model; Figure 2 This is a rear view structural diagram of the shunt resistor according to an embodiment of the present utility model; Figure 3 This is a side view of the shunt resistor according to an embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of the shunt resistor according to an embodiment of the present invention; Figure 5 This is a three-dimensional exploded view of the shunt resistor according to an embodiment of the present invention; In the diagram, 10 is a shunt resistor, 110 is an alloy resistor sheet, 111 is an adjustable resistance slot, 112 is an identification area, and 113 is a positioning hole; 120 is a terminal piece, 121 is a detection riveting hole, 122 is a wiring hole, and 123 is a press-fit nut. Detailed Implementation

[0015] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other. Example 1

[0016] like Figure 1-5 As shown, this embodiment of the utility model provides a shunt resistor 10, including an alloy resistance sheet 110. Terminal pieces 120 are welded to both sides of the alloy resistance sheet 110. Each terminal piece 120 has a wiring hole 122 and a detection riveting hole 121. A pressure nut 123 is provided on the detection riveting hole 121. The wiring hole 122 is used to connect and fix a high-current wire, and the pressure nut 123 is used to connect a sampling wire or a sampling column. The wiring hole 122 and the detection riveting hole 121 must be sufficiently large to ensure reliable connection to the external circuit and to withstand the mechanical stress and heat generated when a large current passes through.

[0017] Specifically, the alloy resistor sheet 110 is a rectangular alloy sheet with a thickness greater than 0.8 mm. Materials with low resistivity and a small temperature coefficient, such as manganin alloys and constantan alloys, are selected. These materials can maintain a stable resistance value when a large current passes through them, ensuring shunt accuracy.

[0018] Optionally, the thickness of the terminal piece 120 is greater than or equal to that of the alloy resistor piece 110, and the width of the terminal piece 120 is the same as that of the alloy resistor piece 110.

[0019] Optionally, the press-fit nut 123 is greater than or equal to 3.38 mm, and the inner diameter of the wiring hole 122 is greater than the inner diameter of the detection riveting hole 121.

[0020] like Figure 4 , 5 As shown, the alloy resistor sheet 110 has at least one adjustable groove 111 on its side.

[0021] One of the surfaces of the alloy resistor sheet 110 is provided with a marking area 112.

[0022] Optionally, the alloy resistor sheet 110 is provided with a positioning hole 113 that passes through the alloy resistor sheet.

[0023] The shunt resistor of this utility model has a rectangular sheet structure with a relatively large sampling thickness, with terminal pieces welded to both sides of the alloy resistor sheet. The terminal pieces have connection holes and detection riveting holes, with a press-fit nut installed in the detection riveting hole. The connection holes are used to connect and fix high-current wires, and the press-fit nut is used to connect sampling wires or sampling posts. This allows the shunt resistor to be used for detecting and sampling ultra-high currents.

[0024] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A shunt resistor, characterized in that, The device includes an alloy resistor sheet, and terminal pieces welded to both sides of the alloy resistor sheet. Each terminal piece has a wiring hole and a detection riveting hole, and a press-fit nut is provided on the detection riveting hole. The wiring hole is used to connect and fix a high-current wire, and the press-fit nut is used to connect a sampling wire or a sampling column. The alloy resistor sheet is a rectangular alloy sheet with a thickness greater than 0.8 mm.

2. The shunt resistor according to claim 1, characterized in that, The thickness of the terminal piece is greater than or equal to that of the alloy resistor piece, and the width of the terminal piece is the same as that of the alloy resistor piece.

3. The shunt resistor according to claim 1, characterized in that, The rivet nut is greater than or equal to 3.38 mm, and the inner diameter of the wiring hole is greater than the inner diameter of the detection rivet hole.

4. The shunt resistor according to claim 1, characterized in that, At least one resistance adjustment slot is provided on the side of the alloy resistor sheet.

5. The shunt resistor according to claim 1, characterized in that, One surface of the alloy resistor sheet is provided with a marking area.

6. The shunt resistor according to claim 1, characterized in that, The alloy resistor sheet is provided with a positioning hole that passes through the alloy resistor sheet.

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