CN208922801U - A kind of current sensing resistor - Google Patents
A kind of current sensing resistor Download PDFInfo
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- CN208922801U CN208922801U CN201821984202.4U CN201821984202U CN208922801U CN 208922801 U CN208922801 U CN 208922801U CN 201821984202 U CN201821984202 U CN 201821984202U CN 208922801 U CN208922801 U CN 208922801U
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- metal layer
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- current sensing
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Abstract
The utility model specifically discloses a kind of current sensing resistors, current sensing resistor includes: metal plate, insulating layer, the first metal layer, second metal layer and third metal layer, insulating layer and the first metal layer are attached to the outer surface of metal plate, insulating layer is covered in the middle section of metal plate, the first metal layer is attached to the both ends of metal plate and the side at both ends, second metal layer is covered in the outer surface of the first metal layer, third metal layer is covered in the outer surface of second metal layer, second metal layer and third metal layer are overlapped with the both ends of insulating layer, and second metal layer all covers the first metal layer, third metal layer all covers second metal layer.Metal plate plays the role of the resistive layer effect of carrier and resistor simultaneously, the both ends of metal plate are sequentially attached to as the three-layer metal layer of electrode, to which the heat that metal plate generates can easily be transmitted to the electrode on both sides, it can effectively solve the problem that resistor radiates bad problem.
Description
Technical field
The utility model relates to roll-in manufacturing field more particularly to a kind of current sensing resistors.
Background technique
With the development of science and technology the continuous promotion of the development and people in epoch to the high functional requirement of miniaturization of electronic products,
The thick film Chip-R of reliable performance and process stabilizing also answers the property requirements of electronic product that diversified development trend is presented,
It is well known that various electronic products in order to ensure making its steady operation, can all make a power supply, come ensure its it is normal and
Stable work, and the steady operation of every kind of power supply all be unable to do without a kind of be connected to and plays the low of current detecting on feed circuit
Valued resistor, this resistance are exactly the current sense resistor that people often say, as the high-power demand of miniaturization of electronic products adds
The current sense resistor of play, high power low resistance is increasingly pursued by market.Currently, existing common low resistance Chip-R
Generally include insulating substrate, back electrode, it is secondary or three times front electrode, resistive layer, the first protective layer, the second protective layer, character code,
Side electrode, nickel coating and tin coating, why power is not high for this product, is primarily due in product design and manufacturing process
There is also following disadvantages:
First, resistive layer is close to the central part of insulating substrate, and farther out apart from side electrode, the heat of resistance is often assembled
In the centre of resistive layer, for the heat of resistance during electrode from the middle to both ends and side electrode are distributed, there are scattered
Hot path is too long and makes the bad problem that radiates.
Second, common low resistance resistance is cut or is used using hilted broadsword when carrying out the amendment of radium-shine resistance value, either
Knife is cut, radium-shine resistance trimming is all larger to the damage of resistive layer, and reduces the resistance to power capability of resistance.
Third, common low resistance resistance are all made of the length for reducing resistive layer, and the mode for lengthening two end electrodes length is come
Production in this way, causing the internal resistance of two end electrodes (silver) to increase because two end electrodes length increases, and makes the temperature coefficient mistake of resistance
Greatly.
Utility model content
The purpose of this utility model is that: a kind of current sensing resistor is provided, to solve current detecting in the prior art
The resistive layer of resistance is close to the central part of insulating substrate, and farther out apart from side electrode, the heat of resistance tends to collect in resistance
The centre of layer, for the heat of resistance during electrode from the middle to both ends and side electrode are distributed, there are heat dissipation paths
It is too long and make the bad problem that radiates.
The utility model provides a kind of current sensing resistor, which includes metal plate, insulating layer,
One metal layer, second metal layer and third metal layer, the insulating layer and the first metal layer are attached to the metal plate
Outer surface, the insulating layer is covered in the middle section of the metal plate, and the first metal layer is attached to the metal plate
Both ends and both ends side, the second metal layer is covered in the outer surface of the first metal layer, the third metal
Layer is covered in the outer surface of the second metal layer, the second metal layer and the third metal layer with the insulating layer
Both ends overlap joint, and the second metal layer all covers the first metal layer, the third metal layer is by second gold medal
Belong to layer all to cover.
Preferably, the metal plate uses metal alloy material.
Preferably, the first metal layer uses copper material, the second metal layer uses nickel material, the third gold
Belong to layer and uses tin material.
Preferably, the insulating layer uses dielectric resin material.
Preferably, the metal plate is in the form of sheets.
Preferably, the metal plate includes spaced first end, second end and the connection first end and institute
State the linkage section of second end, the insulating layer is covered in the linkage section, the first metal layer be attached to the first end and
The second end.
Preferably, further including the character code mark for being set to the insulating layer outer surface.
The utility model has the following beneficial effects:
1), metal plate plays the role of the resistive layer effect of carrier and resistor, and the first gold medal as electrode simultaneously
Belong to layer, second metal layer and third metal layer and be sequentially attached to the both ends of metal plate and the side wall at both ends, so that metal plate produces
Raw heat can easily be transmitted to the electrode on both sides, can effectively solve the problem that resistor radiates bad problem.
2), metal plate uses alloy material, since the electrical conductivity of copper, nickel is big compared with silver metal, the more silver-colored gold of temperature coefficient
Belong to small, is manufactured by way of without the length reducing metal plate and lengthening electrode length, while can also effectively be promoted
Power and TCR (Temperature coefficient of resistance temperature coefficient) index of current sense resistor, and
And compared with the prior art in cost as electrode can be effectively reduced using silver metal.
3), repair resistance to alloy sheets by mechanical grinding, substitute it is existing it is radium-shine repair resistance, can effectively avoid to alloy
The damage of plate, and can guarantee that the resistance value precision of the current sensing resistor is higher.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of current sensing resistor in the utility model embodiment；
Fig. 2 is that step S101 processing pre-structure shows in the manufacturing process of current sensing resistor in the utility model embodiment
It is intended to；
Fig. 3 is the structure in the utility model embodiment in the manufacturing process of current sensing resistor after step S101 processing
Schematic diagram；
Fig. 4 is the structure in the utility model embodiment in the manufacturing process of current sensing resistor after step S102 processing
Schematic diagram；
Fig. 5 is the structure in the utility model embodiment in the manufacturing process of current sensing resistor after step S103 processing
Schematic diagram；
Fig. 6 is the structure in the utility model embodiment in the manufacturing process of current sensing resistor after step S104 processing
Schematic diagram；
Fig. 7 is the structure in the utility model embodiment in the manufacturing process of current sensing resistor after step S105 processing
Schematic diagram.
In figure:
1, metal plate；2, insulating layer；3, the first metal layer；4, second metal layer；5, third metal layer；6, alloy base material；
7, substrate；71, alloy sheets；711, first end；712, second end；713, linkage section；72, interconnecting piece；721, through-hole；8, character code mark
Know.
Specific embodiment
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, the present embodiment provides current sensing resistor, including metal plate 1, insulating layer 2, the first metal layer 3,
Second metal layer 4 and third metal layer 5, insulating layer 2 and the first metal layer 3 are attached to the outer surface of metal plate 1, insulating layer 2
It is covered in the middle section of metal plate 1, the first metal layer 3 is attached to the both ends of metal plate 1 and the side at both ends, the second metal
Layer 4 is covered in the outer surface of the first metal layer 3, and third metal layer 5 is covered in the outer surface of second metal layer 4, second metal layer 4
It is overlapped with the both ends of insulating layer 2 with third metal layer 5, and second metal layer 4 all covers the first metal layer 3, third gold
Belong to layer 5 and all covers second metal layer 4.In the present embodiment, metal plate 1 plays the role of the resistance of carrier and resistor simultaneously
Layer effect, and metal plate 1 is sequentially attached to as the first metal layer of electrode 3, second metal layer 4 and third metal layer 5
The side wall at both ends and both ends, so that the heat that metal plate 1 generates can easily be transmitted to the electrode on both sides, it can be effective
It is bad to solve the problems, such as that resistor radiates.
Specifically, metal plate 1 uses alloy material, is specifically as follows corronil, since the electrical conductivity of copper, nickel is more silver-colored
Metal is big, and temperature coefficient is small compared with silver metal, by way of without the length reducing metal plate 1 and lengthening electrode length
Manufacture, while can also effectively promote the power and TCR index of current sense resistor, and compared with the prior art in using silver gold
Belong to and can be effectively reduced cost as electrode.
The first metal layer 3 uses copper material, and second metal layer 4 uses nickel material, and third metal layer 5 uses tin material, absolutely
Edge layer 2 then uses dielectric resin material.
In the present embodiment, metal plate 1 in the form of sheets, metal plate 1 include spaced first end 711, second end 712 and
The linkage section 713 of first end 711 and second end 712 is connected, insulating layer 2 is covered in linkage section 713, and the first metal layer 3 is attached to
First end 711 and second end 712.
The current sensing resistor further includes the character code mark 8 for being set to 2 outer surface of insulating layer, passes through 8 mark of character code mark
Show the model of the current sense resistor resistor, is distinguished convenient for user.
The present embodiment also provides a kind of manufacturing process of current sensing resistor in above scheme, comprising the following steps:
S10: has the metal plate 1 of insulating layer 2 in the outer surface for preparing middle section.
Specifically, referring to figure 2. to Fig. 7, metal plate 1 uses alloy material, and step S10 includes:
S101: preparing a piece of alloy base material 6, alloy base material 6 is processed into substrate 7 using Sheet Metal Forming Technology, substrate 7 includes more
A spaced alloy sheets 71 and interconnecting piece 72, and one end of alloy sheets 71 is connect with interconnecting piece 72.
Alloy base material 6 is whole to be also punched into multiple through-holes 721 in the form of sheets, on interconnecting piece 72, through-hole 721 and alloy sheets 71
Quantity correspond, when rear workshop section carries out pelletizing, can be fixed by through-hole 721.
S102: carrying out repairing resistance using equipment for grinding to each alloy sheets 71, and the resistance value of alloy sheets 71 is made to be equal to specified resistance value.
Sub-fraction is abraded by linkage section 713 of the mechanical grinding to alloy sheets 71, for correcting resistance value, compared to existing
It is radium-shine to repair resistance, the damage to alloy sheets 71 can be effectively avoided, and can guarantee the resistance value essence of the current sensing resistor
Du Genggao.
S103: a layer insulating 2 is encapsulated in the outer surface of each 71 middle section of alloy sheets.
Resin material can be used in insulating layer 2, by insulating layer 2 by the appearance of the linkage section 713 of 71 middle section of alloy sheets
Face precision plastic packaging can effectively protect linkage section 713.
S104: in the outer surface of each insulating layer 2 processing character code mark 8.
Silk screen printing process can be used, identify 8 in the outer surface silk-screen character code of each insulating layer 2, the techniques such as engraving can also be passed through
The engraving silk-screen character code mark 8 in the outer surface of insulating layer 2.
S105: using the method for pelletizing, multiple alloy sheets 71 are cut.
The pelletizing technique can simultaneous processing go out multiple current sensing resistors, substantially increase current sensing resistor
Processing efficiency.
S20: being electroplated one layer of first metal using barrel plating mode at the both ends of metal plate 1 and the side at both ends, forms the
One metal layer 3.
The first metal layer 3 is preferably copper material.
S30: being electroplated one layer of second metal layer 4 using barrel plating mode in the outer surface of the first metal layer 3, and described second
The first metal layer 3 is all covered and is overlapped with the both ends of the insulating layer 2 by metal layer 4.
Second metal layer 4 is preferably nickel material.
S40: one layer of third metal layer 5, the third are electroplated using barrel plating mode in the outer surface of the second metal layer 4
The second metal layer 4 is all covered and is overlapped with the both ends of the insulating layer 2 by metal layer 5.
Third metal layer 5 is preferably tin material.
Obviously, the above embodiments of the present invention is used for the purpose of clearly illustrating examples for clearly illustrating the present invention, and
It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in
Within the protection scope of the utility model claims.
Claims (7)
1. a kind of current sensing resistor characterized by comprising metal plate (1), insulating layer (2), the first metal layer (3),
Two metal layers (4) and third metal layer (5), the insulating layer (2) and the first metal layer (3) are attached to the metal plate
(1) outer surface, the insulating layer (2) are covered in the middle section of the metal plate (1), the first metal layer (3) attachment
In the both ends of the metal plate (1) and the side at both ends, the second metal layer (4) is covered in the first metal layer (3)
Outer surface, the third metal layer (5) is covered in the outer surface of the second metal layer (4), the second metal layer (4) and
The third metal layer (5) overlaps with the both ends of the insulating layer (2), and the second metal layer (4) is by first gold medal
Belong to layer (3) all to cover, the third metal layer (5) all covers the second metal layer (4).
2. current sensing resistor according to claim 1, which is characterized in that the metal plate (1) uses metal alloy
Material.
3. current sensing resistor according to claim 1, which is characterized in that the first metal layer (3) uses copper material
Matter, the second metal layer (4) use nickel material, and the third metal layer (5) uses tin material.
4. current sensing resistor according to claim 1, which is characterized in that the insulating layer (2) uses insulating resin
Material.
5. current sensing resistor according to claim 1, which is characterized in that the metal plate (1) is in the form of sheets.
6. current sensing resistor according to claim 1, which is characterized in that the metal plate (1) includes interval setting
First end (711), second end (712) and connect the first end (711) and the second end (712) linkage section
(713), the insulating layer (2) is covered in the linkage section (713), and the first metal layer (3) is attached to the first end
(711) and the second end (712).
7. current sensing resistor according to claim 1, which is characterized in that further include being set to the insulating layer (2)
The character code of outer surface identifies (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821984202.4U CN208922801U (en) | 2018-11-29 | 2018-11-29 | A kind of current sensing resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821984202.4U CN208922801U (en) | 2018-11-29 | 2018-11-29 | A kind of current sensing resistor |
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| Publication Number | Publication Date |
|---|---|
| CN208922801U true CN208922801U (en) | 2019-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821984202.4U Active CN208922801U (en) | 2018-11-29 | 2018-11-29 | A kind of current sensing resistor |
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| Country | Link |
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| CN (1) | CN208922801U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109326400A (en) * | 2018-11-29 | 2019-02-12 | 昆山厚声电子工业有限公司 | A kind of current sensing resistor and its manufacturing process |
-
2018
- 2018-11-29 CN CN201821984202.4U patent/CN208922801U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109326400A (en) * | 2018-11-29 | 2019-02-12 | 昆山厚声电子工业有限公司 | A kind of current sensing resistor and its manufacturing process |
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