CN220121579U - Shunt resistor with circuit board - Google Patents
Shunt resistor with circuit board Download PDFInfo
- Publication number
- CN220121579U CN220121579U CN202320682127.0U CN202320682127U CN220121579U CN 220121579 U CN220121579 U CN 220121579U CN 202320682127 U CN202320682127 U CN 202320682127U CN 220121579 U CN220121579 U CN 220121579U
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- Prior art keywords
- circuit board
- resistor
- sampling
- shunt resistor
- electrode
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- 238000005070 sampling Methods 0.000 claims abstract description 53
- 238000003466 welding Methods 0.000 claims description 34
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000010894 electron beam technology Methods 0.000 claims description 4
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000007772 electrode material Substances 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000005476 soldering Methods 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Details Of Resistors (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model relates to the technical field of resistance elements, in particular to a shunt resistor with a circuit board. According to the utility model, the circuit board is arranged on the shunt resistor, the connector is arranged on the circuit board and is connected with the electrode through the sampling circuit on the circuit board, and the connector is inserted into the connector on the circuit board by the standard interface, so that required data can be acquired.
Description
Technical Field
The utility model relates to the technical field of resistance elements, in particular to a shunt resistor with a circuit board.
Background
The existing alloy resistor generally adopts a structure that a shunt resistor body is arranged in the middle, shunt electrodes are arranged at two sides, and the current passing through the shunt resistor can be detected by collecting the voltage values at two ends of the shunt resistor body;
when the current divider is used, the current divider is required to be arranged on the circuit board in a resistance welding way, a welding area on the current divider is connected with a welding position on the circuit board, and the current dividing electrodes at two ends of the current divider collect voltage values through current and a sampling route on the circuit board;
the calibration resistance value measured by the circuit board is not mounted on the circuit board when the shunt resistor is manufactured by a manufacturer, and the shunt resistor is required to be welded on the circuit board when the shunt resistor is used, so that the calibration resistance value measured by the circuit board and the manufacturer measured in the actual use process have certain deviation, and the deviation of the initial value of the resistance value caused by welding is not negligible for the shunt resistor with the micro ohm level.
Disclosure of Invention
The utility model aims to solve the technical problem of providing the shunt resistor with the circuit board, which effectively avoids the problem of deviation of the initial value of the resistance value caused by welding, is more convenient to install and use and improves the sampling precision.
In order to solve the technical problems, the technical scheme adopted by the utility model for solving the technical problems is as follows:
a shunt resistor with circuit board, comprising:
the shunt resistor comprises a resistor body, electrodes are arranged on two sides of the resistor body, a welding area is arranged on the electrodes, and the welding area is close to the resistor body;
the circuit board is arranged on the shunt resistor, a sampling circuit is arranged on the circuit board, and the welding end of the sampling circuit is connected with the welding area of the electrode;
the connector is arranged on the circuit board, and the connecting end of the sampling circuit is connected with the connector.
In one embodiment of the utility model, the welding end of the sampling circuit is arranged on the circuit board, the circuit board is welded with the electrode through the welding end, and the projection area of the welding end on the welding area is 1/4-1/2 of the welding area.
In one embodiment of the utility model, the resistor is smaller than the thickness of the electrode, and the bottom surface of the resistor is on the same plane with the bottom surface of the electrode, so that a mounting gap is formed between the resistor and the circuit board.
In one embodiment of the utility model, two sampling pins are arranged on the connector, the two sampling pins are connected with two sampling lines on the circuit board in one-to-one correspondence, and the sampling lines and the sampling pins are arranged opposite to the mounting gap.
In one embodiment of the utility model, the resistor body and the electrodes on two sides are of a sheet structure, and the electrodes and the resistor body are welded into a whole by adopting an electron beam.
In one embodiment of the utility model, the length of the electrode is 3-10 times the length of the resistor.
In one embodiment of the utility model, the electrode material is copper or brass.
In one embodiment of the utility model, the electrode is provided with a mounting hole, and the mounting hole is arranged at one side far away from the resistor body.
In one embodiment of the utility model, the sampling lines are provided with auxiliary lines, the circuit board is provided with a capacitor, and the auxiliary lines on the two sampling lines are connected with the capacitor.
In one embodiment of the present utility model, two fixing pins are disposed on the connector, an NTC resistor is disposed on the circuit board, and the fixing pins are connected with the NTC resistor through connection lines on the circuit board.
The utility model has the beneficial effects that:
according to the utility model, the circuit board is arranged on the shunt resistor, the connector is arranged on the circuit board and is connected with the electrode through the sampling circuit on the circuit board, and the connector is inserted into the connector on the circuit board by the standard interface, so that required data can be acquired.
Drawings
Fig. 1 is a prior art shunt resistor usage.
Fig. 2 is a schematic diagram of a shunt resistor with a circuit board according to the present utility model.
Fig. 3 is a front view of the present utility model.
Fig. 4 is a top view of the present utility model.
Fig. 5 is a schematic diagram of the shunt resistor of the present utility model.
The reference numerals in the figures illustrate: 1. a shunt resistor; 11. a resistor; 12. an electrode; 13. a mounting hole; 14. a welding area; 2. a circuit board; 21. sampling lines; 22. an auxiliary line; 23. a capacitor; 24. a connection line; 25. an NTC resistor; 3. a connector; 31. sampling pins; 32. fixing pins; 4. a mounting gap; 100. a shunt resistor body; 101. a shunt pole piece; 200. a circuit board; 201. a welding position; 202. sampling routes.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.
Referring to fig. 2-5, a shunt resistor with a circuit board, comprising:
the shunt resistor 1 comprises a resistor body 11, wherein electrodes 12 are arranged on two sides of the resistor body 11, a welding area 14 is arranged on the electrodes 12, and the welding area 14 is close to the resistor body 11;
the circuit board 2 is arranged on the shunt resistor 1, a sampling line 21 is arranged on the circuit board 2, and the welding end of the sampling line 21 is connected with the welding area 14 of the electrode 12;
and a connector 3 disposed on the circuit board 2, wherein a connection end of the sampling line 21 is connected to the connector 3.
According to the utility model, the circuit board 2 is arranged on the shunt resistor 1, the connector 3 is arranged on the circuit board 2, the connector 3 is connected with the electrode 12 through the sampling circuit 21 on the circuit board 2, and the standard interface is inserted into the connector 3 on the circuit board 2, so that required data can be acquired.
Compared with the prior art, the embodiment provided by the utility model greatly reduces the production time and labor cost, does not need to be welded on a circuit board, does not occupy the space of the circuit board, and can enable the size (particularly the thickness) of the shunt resistor to be randomly adjusted.
The circuit board 2 is provided with a sampling circuit 21, the sampling circuit 21 is respectively communicated with the shunt resistor and the standard connector 3, after the production of the shunt resistor product, the initial resistance value of the whole shunt resistor can be measured and calibrated through the connector 3, and the initial value and the production information can be marked on the product together, so that the shunt resistor is convenient to review and read during use; when the shunt resistor is installed and used, the shunt resistor is only required to be connected in a tested circuit, and the shunt resistor is inserted into the connector 3 on the circuit board 2 by using a standard interface, so that required data can be acquired.
In one embodiment of the present utility model, the soldering end of the sampling circuit 21 is disposed on the circuit board 2, the circuit board 2 is soldered with the electrode 12 through the soldering end, and the projection area of the soldering end on the soldering area 14 is 1/4-1/2 of the soldering area 14.
Specifically, the circuit board 2 is welded to the electrode 12 through a welding end, the welding end is welded to the welding area 14, so that the connection strength of the circuit board 2 and the shunt resistor 1 can be ensured, the welding end is preferably provided with a plurality of welding points in an array, the sampling circuit 21 is connected with one of the welding points, the other welding points are welded with the electrode 12 in a dispersed manner, a certain gap is arranged between the electrode 12 and the circuit board 2 while the connection strength is ensured, and a certain heat dissipation effect can be improved.
In one embodiment of the utility model, the resistor 11 is smaller than the thickness of the electrode 12, and the bottom surface of the resistor 11 is on the same plane as the bottom surface of the electrode 12, so that a mounting gap 4 is formed between the resistor 11 and the circuit board 2.
Specifically, the installation gap 4 formed between the resistor body 11 and the circuit board 2, because the circuit board 2 and the welding area 14 on the electrode 12 are welded together, the heat generated by the shunt resistor in the use process can be discharged from the installation gap 4, so that the heat dissipation can be conveniently and timely obtained when the resistor is made into a larger size, the installation gap 4 can effectively improve the heat dissipation rate of the sampling circuit 21 and the circuit board 2, and the heat dissipation performance of the shunt resistor is greatly improved.
In one embodiment of the present utility model, two sampling pins 31 are disposed on the connector 3, the two sampling pins 31 are connected to two sampling lines 21 on the circuit board 2 in a one-to-one correspondence manner, and the sampling lines 21 and the sampling pins 31 are disposed opposite to the mounting gap 4.
Specifically, the sampling line 21 and the sampling pin 31 are arranged opposite to the installation gap 4, and the sampling line 21 and the sampling pin 31 can be arranged at the installation gap 4, so that heat generated in the sampling process is rapidly discharged from the installation gap 4, and the service life of the resistor is prolonged.
In one embodiment of the present utility model, the resistor 11 and the electrodes 12 on both sides are in a sheet structure, and the electrodes 12 and the resistor 11 are integrally welded by electron beam welding.
Specifically, the resistor 11 and the electrodes 12 on two sides are of sheet-shaped structures, the splicing belt can be punched by adopting a stamping die, the production efficiency is high, the resistor 11 and the electrodes 12 on two sides are spliced by electron beam welding, mass production of alloy resistors can be realized, and the consistency and stability of products are ensured.
In one embodiment of the utility model, the length of the electrode 12 is 3-10 times the length of the resistor 11.
Specifically, because the resistor alloy at the middle part of the shunt electrified by the shunt generates a large amount of heat, the larger electrode 12 is adopted to enable the shunt to have a larger heat dissipation area, the temperature rise of the shunt can be reduced, the effect of improving the stability of the resistance value is achieved, and compared with the resistor 11 adopting the integral structure, the overcurrent capacity and the heat dissipation capacity of the shunt can be effectively improved.
In one embodiment of the utility model, the electrode 12 material is copper or brass.
In one embodiment of the utility model, the electrode 12 is provided with a mounting hole 13, and the mounting hole 13 is provided on a side away from the resistor 11.
Specifically, through the mounting hole 13 on the electrode 12, the resistor can be reliably positioned by inserting the insulating rod when being stacked together, so that dislocation phenomenon can not occur between resistor products in the moving or carrying process, the resistance value is stable, meanwhile, two mounting of the resistor products can be sleeved on the using circuit board 2, the resistor can be rapidly positioned, and therefore the shunt resistor 1 can be conveniently and reliably positioned, the problems of shaking and the like of the resistor products in the using process are avoided, and the stability of the resistance value of the resistor is further improved.
In one embodiment of the present utility model, the auxiliary line 22 is disposed on the sampling line 21, the capacitor 23 is disposed on the circuit board 2, and the auxiliary lines 22 on the two sampling lines 21 are connected to the capacitor 23.
Specifically, two auxiliary lines 22 are led out on the sampling line 21 of the circuit board 2, and the two auxiliary lines 22 are connected with pins of the capacitor 23, so that the shunt resistor product can still keep higher sampling precision in an environment with stronger temperature change or circuit interference, thereby improving the competitiveness of the product.
In one embodiment of the present utility model, two fixing pins 32 are disposed on the connector 3, the NTC resistor 25 is disposed on the circuit board 2, and the fixing pins 32 are connected to the NTC resistor 25 through the connection lines 24 on the circuit board 2.
Specifically, the circuit board 2 is provided with the connecting circuit 24, and the pins of the electrode 12 and the NTC resistor 25 are communicated through the connecting circuit 24, so that the capability of the product for resisting temperature change or other interference is enhanced, and the circuit board has the characteristics of small volume, low manufacturing cost and better anti-interference performance.
When the connector 3 is used, the connector 3 is a standard connector 3 in the market, and a standard interface is used for being inserted into the connector 3 on the circuit board 2, so that required data can be acquired; the sampling precision of the shunt resistor is improved and the competitiveness of the product is improved while the use is more convenient.
The above-described embodiments are merely preferred embodiments for fully explaining the present utility model, and the scope of the present utility model is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present utility model, and are intended to be within the scope of the present utility model. The protection scope of the utility model is subject to the claims.
Claims (10)
1. A shunt resistor with circuit board, comprising:
the shunt resistor comprises a resistor body, electrodes are arranged on two sides of the resistor body, a welding area is arranged on the electrodes, and the welding area is close to the resistor body;
the circuit board is arranged on the shunt resistor, a sampling circuit is arranged on the circuit board, and the welding end of the sampling circuit is connected with the welding area of the electrode;
the connector is arranged on the circuit board, and the connecting end of the sampling circuit is connected with the connector.
2. The shunt resistor with circuit board of claim 1, wherein said soldered end of said sampling line is disposed on said circuit board, said circuit board is soldered to said electrode by said soldered end, and a projected area of said soldered end on said soldered area is 1/4-1/2 of said soldered area.
3. The circuit board-carrying shunt resistor of claim 1, wherein the resistor body is less than the thickness of the electrode and the bottom surface of the resistor body is on the same plane as the bottom surface of the electrode such that a mounting gap is formed between the resistor body and the circuit board.
4. The shunt resistor with circuit board of claim 3, wherein two sampling pins are provided on said connector, said two sampling pins are connected in one-to-one correspondence with two sampling lines on said circuit board, said sampling lines and sampling pins are disposed opposite to the mounting gap.
5. The shunt resistor with circuit board according to claim 1, wherein said resistor body and electrodes on both sides are of sheet-like structure, said electrodes being integrally welded with said resistor body by electron beam.
6. The circuit board-carrying shunt resistor of claim 1, wherein the length of said electrode is 3-10 times the length of said resistor body.
7. The circuit board shunt resistor of claim 1, wherein said electrode material is copper or brass.
8. The circuit board-equipped shunt resistor of claim 1, wherein said electrode is provided with a mounting hole, and said mounting hole is provided on a side remote from the resistor body.
9. The shunt resistor with circuit board according to claim 4, wherein auxiliary lines are provided on said sampling lines, and a capacitor is provided on said circuit board, and the auxiliary lines on both sampling lines are connected to said capacitor.
10. The shunt resistor with circuit board of claim 1, wherein two fixed pins are provided on said connector, an NTC resistor is provided on said circuit board, and said fixed pins are connected to said NTC resistor through connection lines on the circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320682127.0U CN220121579U (en) | 2023-03-31 | 2023-03-31 | Shunt resistor with circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320682127.0U CN220121579U (en) | 2023-03-31 | 2023-03-31 | Shunt resistor with circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220121579U true CN220121579U (en) | 2023-12-01 |
Family
ID=88887898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320682127.0U Active CN220121579U (en) | 2023-03-31 | 2023-03-31 | Shunt resistor with circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220121579U (en) |
-
2023
- 2023-03-31 CN CN202320682127.0U patent/CN220121579U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |