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WO2019097925A1 - Shunt resistor - Google Patents

Shunt resistor Download PDF

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Publication number
WO2019097925A1
WO2019097925A1 PCT/JP2018/038344 JP2018038344W WO2019097925A1 WO 2019097925 A1 WO2019097925 A1 WO 2019097925A1 JP 2018038344 W JP2018038344 W JP 2018038344W WO 2019097925 A1 WO2019097925 A1 WO 2019097925A1
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WIPO (PCT)
Prior art keywords
resistor
base material
shunt resistor
measurement terminal
shunt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/038344
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French (fr)
Japanese (ja)
Inventor
建二 村上
デイヴィッド デクスター
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Suncall Corp
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Suncall Corp
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Publication date
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Publication of WO2019097925A1 publication Critical patent/WO2019097925A1/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/148—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors the terminals embracing or surrounding the resistive element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C13/00—Resistors not provided for elsewhere

Definitions

  • the present invention relates to a shunt resistor, and in particular, a large current flows from a high voltage application battery used in an electric car (EV car), a hybrid car (HV car), a plug-in hybrid car (PHV car), etc.
  • the present invention relates to a shunt resistor used in measuring a current value of a flowing current path.
  • a shunt resistor as described in Patent Document 1 As a conventional shunt resistor, a shunt resistor as described in Patent Document 1 is known.
  • a through hole is formed in each of two plate-shaped base materials integrally formed in the resistor with the resistor interposed therebetween, and the first terminal portion is inserted into the through hole, The voltage detection terminal which a terminal part protrudes from the inside of a penetration hole is provided.
  • the voltage detection terminal is joined to the base material (the voltage detection terminal is inserted in the through hole, or welding, etc.) Therefore, when the resistance of this junction increases and the resistance increases, when a large current flows, the heat generation of that portion increases, and there is a possibility that the current value may not be measured accurately. was there.
  • an object of this invention is to provide the shunt resistor which can suppress heat_generation in view of the said problem.
  • the measurement terminal (12) is on the central axis (O) along the longitudinal direction of the base material (11, 11A).
  • the base material is formed by cutting and processing a portion of the predetermined portion located in the predetermined shape into a predetermined shape and bending the cut predetermined portion (inverted U-shaped portion 11e) toward the resistor (10) side. 11, 11A) are characterized in that they are erected and fixed upright.
  • the base material (11, 11A) is partially cut into a predetermined shape, and the cut portion is formed into a predetermined shape portion (inverted U-shaped portion 11e) as a resistor ( 10) Since the measurement terminal (12) is erected and fixed to the base material (11, 11A) by bending it to the side, the base material (11, 11A) as in the prior art On the other hand, it is not necessary to join the measurement terminal (12) by welding or the like. Therefore, according to the present invention, since the junction part existing in the conventional shunt resistor is eliminated, the resistance of the junction part does not increase, and the heat generation can be suppressed.
  • the measurement terminal (12) cuts a part of a predetermined portion located on the central axis (O) along the longitudinal direction of the base material (11, 11A) into a predetermined shape It is erected and fixed on the base material (11, 11A) by bending and forming a predetermined shaped portion (inverted U-shaped portion 11e) processed and cut to the resistor (10) side.
  • the heat generation of the resistor (10) can be suppressed and uniformized.
  • (A) is a perspective view of the shunt resistor which concerns on one Embodiment of this invention
  • (b) is a front view of the shunt resistor which concerns on the same embodiment.
  • the manufacturing process of the shunt resistor which concerns on the same embodiment is shown, (a) shows one base material among a pair of base materials, and is a top view showing the state which processed this base material especially, (b).
  • (A) is a sectional view of the base material shown in (a), and in particular, a sectional view when the reverse U-shaped portion is bent in an upright shape
  • (c) is the other side end of the base material shown in (b) It is sectional drawing which shows the state which welded the resistor.
  • FIG. 1 It is a schematic perspective view for demonstrating the experimental method in measuring heat_generation
  • (A) shows the result of measuring heat generation of the resistor of the shunt resistor according to the embodiment, and (b) shows the through hole at a position shifted from the position on the central axis along the longitudinal direction of the base material
  • the result of measuring the heat generation of the resistor of the shunt resistor in the case of forming the measurement terminal by penetrating and cutting in the vertical direction is shown, and (c) shows the shunt resistor when the measurement terminal is not formed on the base material
  • the shunt resistor 1 is used to measure the current value of the current path through which the current flows, as shown in FIGS. 1 (a) and 1 (b).
  • a portion of each of the predetermined portions of the pair of base members 11 integrally formed with the body 10 and the pair of base members 11 is cut and processed into a predetermined shape, and the cut predetermined portion is bent toward the resistor 10 It is comprised by the measurement terminal 12 standingly installed in the standing-up state by each of the said base material 11 by forming. As shown in FIGS.
  • the resistor 10 is formed, for example, in the form of a thick plate having a thickness of about 3 mm to 5 mm and a short rectangular shape.
  • a Cu—Mn alloy, Cu Preferably, the resistor is made of a Ni-based alloy, a Ni-Cr-based alloy, or the like, and is about 50 ⁇ to 200 ⁇ . As shown in FIGS.
  • the other side end 11c of the base material 11 positioned on the left in the figure is a resistor 10
  • the other side end 11 c of the base material 11 positioned on the right in the figure is welded to the other side 10 b of the resistor 10 by welding.
  • the pair of base materials 11 is integrally formed with the resistor 10 so as to sandwich the resistor 10.
  • the base material 11 is a so-called busper and is made of metal such as copper and, as shown in FIG. 1A, for example, a thick plate having a thickness of about 3 mm to 5 mm and a long rectangular shape It is formed.
  • a circular bolt hole 11b for passing a shaft portion of an insulating bolt (not shown) is vertically penetrated on one side end 11a side (a side opposite to the joint portion of the resistor 10) of the base material 11 It is formed.
  • the measurement terminal 12 is capable of mounting a printed circuit board for current detection, and as shown in FIG. 1A, the base material 11 located on the central axis O along the longitudinal direction of the base material 11 In a part of the other side end 11c side (junction side of the resistor 10), the reverse U-shaped through hole 11d is vertically penetrated and cut along the longitudinal direction, and the cutting process
  • the formed inverted U-shaped portion 11e is erected and fixed on each of the base materials 11 by bending toward the resistor 10 with the base end portion 11e1 of the inverted U-shaped portion 11e as a base point It is
  • a shaft of an insulating bolt (not shown) is allowed to pass by punch pressing on one side end 11a side (left side in the figure) of each of the pair of base materials 11
  • a circular bolt hole 11b is formed penetrating in the vertical direction.
  • a part of a portion located on the central axis O along the longitudinal direction of the base materials 11 by punch press processing A reverse U-shaped through hole 11d is formed vertically through and along the longitudinal direction.
  • the base material 11 has a base end, as shown in FIG. 2A, by forming the reverse U-shaped through holes 11 d vertically through by punch press processing.
  • An inverted U-shaped portion 11 e in which the portion 11 e 1 is not separated from the base material 11 is formed.
  • the arrow is made from the base end 11e1 of the reverse U-shaped portion 11e as a base point, as the base end 11e1 is not separated from the base material 11 It is bent and formed upright in the Y1 direction.
  • the inverted U-shaped portion 11 e is erected and fixed on the other side end 11 c side (right side in the figure) of the base material 11 so that the inverted U-shaped portion 11 e is used as the measurement terminal 12. It will work.
  • the other end 11c of one of the pair of base materials 11 is joined to one side surface 10a of the resistor 10 by welding, which is not illustrated.
  • the other side end 11 c of the other base material 11 of the pair of base materials 11 is joined to the other side surface 10 b of the resistor 10 by welding.
  • the pair of base materials 11 is integrally formed with the resistor 10 so as to sandwich the resistor 10, whereby the shunt resistor 1 as shown in FIG. 1A is manufactured. .
  • a part of the other side end 11 c side (junction portion side of the resistor 10) of the base material 11 located on the central axis O along the longitudinal direction of the base material 11 The through-hole 11d in the reverse U-shape is vertically penetrated and cut along the longitudinal direction, and the reverse U-shaped portion 11e formed by the cutting process is
  • the measurement terminal 12 is formed by bending it toward the resistor 10 with the base end 11e1 as a base point, and the measurement terminal 12 is erected and fixed to each of the base materials 11 .
  • the base material 11 and the measurement terminal 12 are not separately manufactured, it is not necessary to join the measurement terminal 12 to the base material 11 by welding or the like. Therefore, according to the present embodiment, since there is no joint portion as in the conventional shunt resistor, the resistance of the joint portion does not increase, and heat generation can be suppressed.
  • the manufacturing process can be reduced, thereby reducing the cost. It will be possible to do.
  • the measurement terminal 12 needs to be provided in the vicinity of the resistor 10 as shown in FIG. This is because by providing the measurement terminal 12 in the vicinity of the resistor 10, it is possible to reduce noise and the like at the time of current measurement, and to improve detection accuracy of the current measurement. Therefore, the measurement terminal 12 needs to be provided in the vicinity of the resistor 10.
  • a part of the other side end 11 c side (the joint side of the resistor 10) of the base material 11 located on the central axis O along the longitudinal direction of the base material 11 is elongated Since the measurement terminal 12 is formed by vertically penetrating the reverse U-shaped through hole 11d along the direction to form the measurement terminal 12, the measurement terminal 12 is precisely located in the vicinity of the resistor 10 with high accuracy. It can be provided. Therefore, according to the present embodiment, the detection accuracy of the current measurement can be improved as compared with the conventional case.
  • the shapes of the shunt resistor 1, the resistor 10, the base material 11, and the measurement terminal 12 illustrated in the present embodiment are merely examples, and various shapes may be used within the scope of the present invention described in the claims. Modifications and changes are possible.
  • the reverse U-shaped through hole 11d is vertically penetrated and cut and formed, but the present invention is not limited thereto.
  • the through holes 11d may be formed by cutting through the through holes 11d in the vertical direction, and any shape may be used.
  • the present invention an example in which the bolt holes 11b and the through holes 11d are formed in the base material 11 by punch press processing has been described.
  • the present invention is not limited thereto. But it is good.
  • the longitudinal direction is a part of the other side end 11 c side (the joint side of the resistor 10) of the base material 11 located on the central axis O along the longitudinal direction of the base material 11.
  • the through-hole 11d in the reverse U-shape is vertically penetrated and cut to form the measurement terminal 12, but the present invention is not limited thereto, but the central axis O along the longitudinal direction of the base material 11 is
  • the measurement terminal 12 may be formed by cutting through the through hole 11 d in the vertical direction at a position shifted from the position of. However, it is preferable to form the measuring terminal 12 by vertically penetrating the through hole 11 d at a position on the central axis O along the longitudinal direction of the base material 11.
  • Example of experiment> That is, as shown in FIG. 3, the power supply of PRS15-800 made by Matsuda Precision Co., Ltd. is electrically connected to one side end 11a of the pair of base materials 11 of the shunt resistor 1, and the current of 200A is an arrow. The flow was continued continuously for 3600 seconds in the Y10 direction. And in order to measure heat_generation
  • the heat generation of the resistor 10 of the shunt resistor 1 resulted in being uniformly uniform at a maximum value of 127.142 deg.
  • FIG. 4 a shunt resistor 1A as shown in FIG. 4 (b) was manufactured.
  • This shunt resistor 1A is shown in FIG. 3 in that the measurement terminal 12 is formed at a position deviated from the position on the central axis O along the longitudinal direction of the base material 11 (in the figure, the position in the upward direction).
  • the difference is the same as the shunt resistor 1 except the same. Therefore, in FIG. 4B, the same components as those of the shunt resistor 1 shown in FIG. 3 are denoted by the same reference numerals.
  • the power supply of the Matsuda Precision PRK 15-800 is electrically connected to one side end 11a of the pair of base materials 11 of such a shunt resistor 1A, and a current of 200 A was continuously flowed in the direction of arrow Y10 (see FIG. 3) for 3600 seconds.
  • the temperature sensor S (refer FIG. 3) which consists of thermocouples was affixed on the resistor 10, and it measured. The result is shown in FIG. 4 (b).
  • the heat generation of the resistor 10 has a maximum value of 127.557 deg, and the heat generation temperature becomes higher as it goes in the longitudinal direction (as it gets farther from the measurement terminal 12). That is, the heat generation of the resistor 10 is uneven.
  • a shunt resistor 1B as shown in FIG. 4C was manufactured.
  • the shunt resistor 1B is the same as the shunt resistor 1 shown in FIG. 3 except that the measurement terminal 12 is not formed on the base material 11, and is otherwise identical. Therefore, in FIG. 4C, the same components as those of the shunt resistor 1 shown in FIG. 3 are denoted by the same reference numerals.
  • the power supply of the Matsuda Precision PRK 15-800 is electrically connected to one side end 11a of the pair of base materials 11 of such a shunt resistor 1B, and a current of 200 A was continuously flowed in the direction of arrow Y10 (see FIG. 3) for 3600 seconds.
  • the temperature sensor S (refer FIG. 3) which consists of thermocouples was affixed on the resistor 10, and it measured. The result is shown in FIG. 4 (c).
  • the heat generation of the resistor 10 resulted in being uniform overall with a maximum value of 137.946 deg.
  • the heat generation of the resistor 10 results in generation of heat at a significantly higher temperature than the heat generation of the resistor 10 shown in FIG. 4 (a).
  • the measuring terminal 12 by cutting the through hole 11 d vertically at a position on the central axis O along the longitudinal direction of the base material 11 to form the measuring terminal 12. It has been proved that uniformity can be achieved while suppressing heat generation. However, as described above, the through hole 11 d is vertically cut at a position on the central axis O along the longitudinal direction of the base material 11 to form the measurement terminal 12, thereby suppressing the heat generation of the resistor 10.
  • the base material is formed by forming the through hole 11d.
  • the cross-sectional area of 11 will be reduced compared to the conventional shunt resistor.
  • a current of 1 A is applied to the shunt resistor, 0.1 m 2 is required as the cross-sectional area of the base material. Therefore, if the cross-sectional area of the base material 11 is reduced as compared with the conventional shunt resistor, some problems may occur when a large current flows.
  • the shunt resistor 1C shown in FIG. It can be like that.
  • the shunt resistor 1C has a shape in which the shape in the width direction on the other side end 11c side is bulged from the shape in the width direction on the one side end 11a side of the pair of base materials 11A. It is That is, the shape of the pair of base members 11A is wider than the width W1 on one side end 11a where the bolt hole 11b is formed, and the width W2 on the other side end 11c where the through hole 11d is formed. It is formed in As a result, it is possible to compensate for the reduced cross-sectional area corresponding to the formation of the through hole 11d, and to make it equal to the cross-sectional area of the base material of the conventional shunt resistor.
  • the difference between the shunt resistor 1C shown in FIG. 5 and the shunt resistor 1 shown in FIG. 1 is only the difference between the shape of the base material 11A shown in FIG. 5 and the shape of the base material 11 shown in FIG. Are identical. Therefore, in FIG. 5, the same components as those of the shunt resistor 1 shown in FIG. 1 are denoted by the same reference numerals.
  • the shunt resistors 1 and 1C illustrated in the present embodiment are particularly suitable for use in batteries for high voltage applications used in electric vehicles (EV vehicles), hybrid vehicles (HV vehicles), plug-in hybrid vehicles (PHV vehicles), etc. It is useful to measure the current value of the current path through which a large current flows to the circuit.
  • EV vehicles electric vehicles
  • HV vehicles hybrid vehicles
  • PSV vehicles plug-in hybrid vehicles

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Details Of Resistors (AREA)

Abstract

The objective of the present invention is to provide a shunt resistor with which it is possible to suppress heat generation. The present invention has: a resistor 10; a pair of base members 11 sandwiching the resistor 10 and formed integrally with the resistor 10; and measurement terminals 12 fixed so as to stand upright on the base members 11 by cutting a portion at a prescribed location positioned on the center axis line O along the length direction of the base members 11 into a prescribed shape, and bend-forming the cut prescribed shape (reverse-C-shaped portion 11e) toward the resistor 10.

Description

シャント抵抗器Shunt resistor

　本発明は、シャント抵抗器に関し、特に、電気自動車（ＥＶ車）、ハイブリット車（ＨＶ車）、プラグインハイブリット車（ＰＨＶ車）等で使用される高電圧用途のバッテリーからモータ回路へ大電流が流れる電流経路の電流値を計測する際に用いられるシャント抵抗器に関する。 The present invention relates to a shunt resistor, and in particular, a large current flows from a high voltage application battery used in an electric car (EV car), a hybrid car (HV car), a plug-in hybrid car (PHV car), etc. The present invention relates to a shunt resistor used in measuring a current value of a flowing current path.

　従来のシャント抵抗器として、特許文献１に記載のようなシャント抵抗器が知られている。このシャント抵抗器は、抵抗体を挟んで抵抗体に一体的に形成された二つの板状の母材それぞれに貫通孔を形成し、その貫通孔内に第１端子部が挿入され、第２端子部が貫通孔内より突出する電圧検出端子が設けられているものである。 As a conventional shunt resistor, a shunt resistor as described in Patent Document 1 is known. In this shunt resistor, a through hole is formed in each of two plate-shaped base materials integrally formed in the resistor with the resistor interposed therebetween, and the first terminal portion is inserted into the through hole, The voltage detection terminal which a terminal part protrudes from the inside of a penetration hole is provided.

特開２０１７－００９４１９号公報JP, 2017-009419, A

　しかしながら、上記従来のシャント抵抗器は、母材と電圧検出端子を別々に製造した上で、母材に電圧検出端子を接合（貫通孔内に電圧検出端子を挿入、あるいは、溶接等）しているため、この接合部分の抵抗が大きくなり、もって、抵抗が大きくなると、大電流を流した際、その部分の発熱が大きくなり、正確に電流値を計測することができない可能性があるといった問題があった。 However, in the conventional shunt resistor described above, after the base material and the voltage detection terminal are manufactured separately, the voltage detection terminal is joined to the base material (the voltage detection terminal is inserted in the through hole, or welding, etc.) Therefore, when the resistance of this junction increases and the resistance increases, when a large current flows, the heat generation of that portion increases, and there is a possibility that the current value may not be measured accurately. was there.

　そこで、本発明は、上記問題に鑑み、発熱を抑えることができるシャント抵抗器を提供することを目的としている。 Then, an object of this invention is to provide the shunt resistor which can suppress heat_generation in view of the said problem.

　上記本発明の目的は、以下の手段によって達成される。なお、括弧内は、後述する実施形態の参照符号を付したものであるが、本発明はこれに限定されるものではない。 The object of the present invention is achieved by the following means. In addition, although the inside of a parenthesis attaches the referential mark of embodiment mentioned later, this invention is not limited to this.

　請求項１の発明によれば、抵抗体（１０）と、
　前記抵抗体（１０）を挟んで当該抵抗体（１０）に一体的に形成された一対の母材（１１，１１Ａ）と、
　前記母材（１１，１１Ａ）の所定箇所の一部を所定形状に切断加工し、その切断加工した所定形状部分（逆コ字形状部分１１ｅ）を前記抵抗体（１０）側に折り曲げ形成することによって、当該母材（１１，１１Ａ）に起立状に立設固定された測定端子（１２）と、を有してなることを特徴としている。 According to the invention of claim 1, a resistor (10);
A pair of base materials (11, 11A) integrally formed on the resistor (10) with the resistor (10) interposed therebetween;
A part of a predetermined part of the base material (11, 11A) is cut and processed into a predetermined shape, and the cut-shaped predetermined part (inverted U-shaped part 11e) is bent toward the resistor (10). And measuring terminals (12) erected and fixed on the base material (11, 11A).

　また、請求項２の発明によれば、上記請求項１に記載のシャント抵抗器において、前記測定端子（１２）は、前記母材（１１，１１Ａ）の長手方向に沿う中心軸線（Ｏ）上に位置する所定箇所の一部を所定形状に切断加工し、その切断加工した所定形状部分（逆コ字形状部分１１ｅ）を前記抵抗体（１０）側に折り曲げ形成することによって、当該母材（１１，１１Ａ）に起立状に立設固定されてなることを特徴としている。 According to the invention of claim 2, in the shunt resistor according to claim 1, the measurement terminal (12) is on the central axis (O) along the longitudinal direction of the base material (11, 11A). The base material is formed by cutting and processing a portion of the predetermined portion located in the predetermined shape into a predetermined shape and bending the cut predetermined portion (inverted U-shaped portion 11e) toward the resistor (10) side. 11, 11A) are characterized in that they are erected and fixed upright.

　次に、本発明の効果について、図面の参照符号を付して説明する。なお、括弧内は、後述する実施形態の参照符号を付したものであるが、本発明はこれに限定されるものではない。 Next, the effects of the present invention will be described with reference to the drawings. In addition, although the inside of a parenthesis attaches the referential mark of embodiment mentioned later, this invention is not limited to this.

　請求項１に係る発明によれば、母材（１１，１１Ａ）の所定箇所の一部を所定形状に切断加工し、その切断加工した所定形状部分（逆コ字形状部分１１ｅ）を抵抗体（１０）側に折り曲げ形成することによって、当該母材（１１，１１Ａ）に測定端子（１２）を起立状に立設固定するようにしているから、従来のように、母材（１１，１１Ａ）に対し、溶接等によって測定端子（１２）を接合する必要がなくなる。しかして、本発明によれば、従来のシャント抵抗器に存する接合部分がなくなるため、接合部分の抵抗が大きくなることがなく、もって、発熱を抑えることができる。 According to the invention of claim 1, the base material (11, 11A) is partially cut into a predetermined shape, and the cut portion is formed into a predetermined shape portion (inverted U-shaped portion 11e) as a resistor ( 10) Since the measurement terminal (12) is erected and fixed to the base material (11, 11A) by bending it to the side, the base material (11, 11A) as in the prior art On the other hand, it is not necessary to join the measurement terminal (12) by welding or the like. Therefore, according to the present invention, since the junction part existing in the conventional shunt resistor is eliminated, the resistance of the junction part does not increase, and the heat generation can be suppressed.

　また、請求項２に係る発明によれば、測定端子（１２）は、母材（１１，１１Ａ）の長手方向に沿う中心軸線（Ｏ）上に位置する所定箇所の一部を所定形状に切断加工し、その切断加工した所定形状部分（逆コ字形状部分１１ｅ）を抵抗体（１０）側に折り曲げ形成することによって、当該母材（１１，１１Ａ）に起立状に立設固定されているから、抵抗体（１０）の発熱を抑えつつ均一化することができる。 Further, according to the invention of claim 2, the measurement terminal (12) cuts a part of a predetermined portion located on the central axis (O) along the longitudinal direction of the base material (11, 11A) into a predetermined shape It is erected and fixed on the base material (11, 11A) by bending and forming a predetermined shaped portion (inverted U-shaped portion 11e) processed and cut to the resistor (10) side. Thus, the heat generation of the resistor (10) can be suppressed and uniformized.

（ａ）は、本発明の一実施形態に係るシャント抵抗器の斜視図、（ｂ）は、同実施形態に係るシャント抵抗器の正面図である。(A) is a perspective view of the shunt resistor which concerns on one Embodiment of this invention, (b) is a front view of the shunt resistor which concerns on the same embodiment. 同実施形態に係るシャント抵抗器の製造工程を示し、（ａ）は、一対の母材のうち一方の母材を示し、特に、この母材を加工した状態を示す平面図、（ｂ）は、（ａ）に示す母材の断面図を示し、特に、逆コ字形状部分を起立状に折り曲げ形成した際の断面図、（ｃ）は、（ｂ）に示す母材の他側端部に抵抗体を溶接した状態を示す断面図である。The manufacturing process of the shunt resistor which concerns on the same embodiment is shown, (a) shows one base material among a pair of base materials, and is a top view showing the state which processed this base material especially, (b). (A) is a sectional view of the base material shown in (a), and in particular, a sectional view when the reverse U-shaped portion is bent in an upright shape, (c) is the other side end of the base material shown in (b) It is sectional drawing which shows the state which welded the resistor. 同実施形態に係るシャント抵抗器の抵抗体の発熱を計測するにあたっての実験方法を説明するための概略斜視図である。It is a schematic perspective view for demonstrating the experimental method in measuring heat_generation | fever of the resistor of the shunt resistor which concerns on the same embodiment. （ａ）は、同実施形態に係るシャント抵抗器の抵抗体の発熱を計測した結果を示し、（ｂ）は、母材の長手方向に沿う中心軸線上の位置からずれた位置に貫通孔を上下方向に貫通して切断加工し、測定端子を形成した場合のシャント抵抗器の抵抗体の発熱を計測した結果を示し、（ｃ）は、母材に測定端子を形成しない場合のシャント抵抗器の抵抗体の発熱を計測した結果を示す図である。(A) shows the result of measuring heat generation of the resistor of the shunt resistor according to the embodiment, and (b) shows the through hole at a position shifted from the position on the central axis along the longitudinal direction of the base material The result of measuring the heat generation of the resistor of the shunt resistor in the case of forming the measurement terminal by penetrating and cutting in the vertical direction is shown, and (c) shows the shunt resistor when the measurement terminal is not formed on the base material It is a figure which shows the result of having measured the heat_generation | fever of the resistor. 他の実施形態に係るシャント抵抗器の斜視図である。It is a perspective view of the shunt resistor which concerns on other embodiment.

　以下、本発明に係るシャント抵抗器の一実施形態を、図面を参照して具体的に説明する。なお、以下の説明において、上下左右の方向を示す場合は、図示正面から見た場合の上下左右をいうものとする。 Hereinafter, an embodiment of a shunt resistor according to the present invention will be specifically described with reference to the drawings. In addition, in the following description, when showing the direction of the upper and lower sides and right and left, it shall mean the upper and lower sides and left and right when it sees from illustration front.

　本実施形態に係るシャント抵抗器は、特に、電気自動車（ＥＶ車）、ハイブリット車（ＨＶ車）、プラグインハイブリット車（ＰＨＶ車）等で使用される高電圧用途のバッテリーからモータ回路へ大電流が流れる電流経路の電流値を計測する際に用いられるもので、図１（ａ），（ｂ）に示すように、シャント抵抗器１は、抵抗体１０と、抵抗体１０を挟むように抵抗体１０と一体的に形成された一対の母材１１と、一対の母材１１それぞれの所定箇所の一部を所定形状に切断加工し、その切断加工した所定形状部分を抵抗体１０側に折り曲げ形成することによって当該母材１１のそれぞれに起立状に立設固定されている測定端子１２とで構成されている。抵抗体１０は、図１（ａ），（ｂ）に示すように、例えば、厚み約３ｍｍ～５ｍｍの厚板状で短尺の矩形状に形成されており、例えば、Ｃｕ－Ｍｎ系合金、Ｃｕ－Ｎｉ系合金、Ｎｉ－Ｃｒ系合金、等で形成されていることが好ましく、５０μΩから２００μΩ程度の抵抗体である。このように形成される抵抗体１０の両側面１０ａ，１０ｂには、図１（ａ），（ｂ）に示すように、図示左に位置する母材１１の他側端部１１ｃが抵抗体１０の一方の側面１０ａに溶接により接合され、図示右に位置する母材１１の他側端部１１ｃが抵抗体１０の他方の側面１０ｂに溶接により接合されている。これにより、一対の母材１１が、抵抗体１０を挟むように抵抗体１０と一体的に形成されることとなる。 In the shunt resistor according to the present embodiment, a high current from a battery for a high voltage application used in an electric car (EV car), a hybrid car (HV car), a plug-in hybrid car (PHV car), etc. The shunt resistor 1 is used to measure the current value of the current path through which the current flows, as shown in FIGS. 1 (a) and 1 (b). A portion of each of the predetermined portions of the pair of base members 11 integrally formed with the body 10 and the pair of base members 11 is cut and processed into a predetermined shape, and the cut predetermined portion is bent toward the resistor 10 It is comprised by the measurement terminal 12 standingly installed in the standing-up state by each of the said base material 11 by forming. As shown in FIGS. 1 (a) and 1 (b), the resistor 10 is formed, for example, in the form of a thick plate having a thickness of about 3 mm to 5 mm and a short rectangular shape. For example, a Cu—Mn alloy, Cu Preferably, the resistor is made of a Ni-based alloy, a Ni-Cr-based alloy, or the like, and is about 50 μΩ to 200 μΩ. As shown in FIGS. 1A and 1B, on the both side surfaces 10a and 10b of the resistor 10 formed in this manner, the other side end 11c of the base material 11 positioned on the left in the figure is a resistor 10 The other side end 11 c of the base material 11 positioned on the right in the figure is welded to the other side 10 b of the resistor 10 by welding. As a result, the pair of base materials 11 is integrally formed with the resistor 10 so as to sandwich the resistor 10.

　一方、母材１１は、所謂バスパーと呼ばれるもので、銅等の金属からなり、図１（ａ）に示すように、例えば、厚み約３ｍｍ～５ｍｍの厚板状で、長尺の矩形状に形成されている。そしてこの母材１１の一側端部１１ａ側（抵抗体１０の接合部と反対側）には、図示しない絶縁ボルトの軸部を通過させるための円形状のボルト孔１１ｂが上下方向に貫通して形成されている。 On the other hand, the base material 11 is a so-called busper and is made of metal such as copper and, as shown in FIG. 1A, for example, a thick plate having a thickness of about 3 mm to 5 mm and a long rectangular shape It is formed. A circular bolt hole 11b for passing a shaft portion of an insulating bolt (not shown) is vertically penetrated on one side end 11a side (a side opposite to the joint portion of the resistor 10) of the base material 11 It is formed.

　一方、測定端子１２は、電流検出用のプリント基板を実装可能なものであって、図１（ａ）に示すように、母材１１の長手方向に沿う中心軸線Ｏ上に位置する母材１１の他側端部１１ｃ側（抵抗体１０の接合部側）の一部に、長手方向に沿うように逆コ字形状の貫通孔１１ｄを上下方向に貫通して切断加工し、その切断加工によって形成される逆コ字形状部分１１ｅを、その逆コ字形状部分１１ｅの基端部１１ｅ１を基点として、抵抗体１０側に折り曲げ形成することによって、母材１１のそれぞれに起立状に立設固定されるものである。 On the other hand, the measurement terminal 12 is capable of mounting a printed circuit board for current detection, and as shown in FIG. 1A, the base material 11 located on the central axis O along the longitudinal direction of the base material 11 In a part of the other side end 11c side (junction side of the resistor 10), the reverse U-shaped through hole 11d is vertically penetrated and cut along the longitudinal direction, and the cutting process The formed inverted U-shaped portion 11e is erected and fixed on each of the base materials 11 by bending toward the resistor 10 with the base end portion 11e1 of the inverted U-shaped portion 11e as a base point It is

　ここで、上記のように構成されるシャント抵抗器１の製造方法を、図２を参照して具体的に説明する。 Here, a method of manufacturing the shunt resistor 1 configured as described above will be specifically described with reference to FIG.

　まず、図２（ａ）に示すように、一対の母材１１それぞれの一側端部１１ａ側（図示では、左側）に、パンチプレス加工により、図示しない絶縁ボルトの軸部を通過させるための円形状のボルト孔１１ｂを上下方向に貫通して形成する。そしてさらに、一対の母材１１それぞれの他側端部１１ｃ側（図示では、右側）に、パンチプレス加工により、母材１１の長手方向に沿う中心軸線Ｏ上に位置する箇所の一部に、長手方向に沿うように逆コ字形状の貫通孔１１ｄを上下方向に貫通して形成する。しかして、このように、パンチプレス加工により、逆コ字形状の貫通孔１１ｄを上下方向に貫通して形成することにより、図２（ａ）に示すように、母材１１には、基端部１１ｅ１が母材１１から切り離されていない逆コ字形状部分１１ｅが形成されることとなる。 First, as shown in FIG. 2A, a shaft of an insulating bolt (not shown) is allowed to pass by punch pressing on one side end 11a side (left side in the figure) of each of the pair of base materials 11 A circular bolt hole 11b is formed penetrating in the vertical direction. Further, on the other side end 11 c side (right side in the figure) of each of the pair of base materials 11, a part of a portion located on the central axis O along the longitudinal direction of the base materials 11 by punch press processing A reverse U-shaped through hole 11d is formed vertically through and along the longitudinal direction. Thus, as described above, as shown in FIG. 2A, the base material 11 has a base end, as shown in FIG. 2A, by forming the reverse U-shaped through holes 11 d vertically through by punch press processing. An inverted U-shaped portion 11 e in which the portion 11 e 1 is not separated from the base material 11 is formed.

　次いで、図２（ｂ）に示すように、基端部１１ｅ１が母材１１から切り離されていな逆コ字形状部分１１ｅを、その逆コ字形状部分１１ｅの基端部１１ｅ１を基点として、矢印Ｙ１方向に起立状に折り曲げ形成する。これにより、母材１１の他側端部１１ｃ側（図示では、右側）に、逆コ字形状部分１１ｅが起立状に立設固定され、もって、この逆コ字形状部分１１ｅが測定端子１２として機能することとなる。 Then, as shown in FIG. 2 (b), the arrow is made from the base end 11e1 of the reverse U-shaped portion 11e as a base point, as the base end 11e1 is not separated from the base material 11 It is bent and formed upright in the Y1 direction. As a result, the inverted U-shaped portion 11 e is erected and fixed on the other side end 11 c side (right side in the figure) of the base material 11 so that the inverted U-shaped portion 11 e is used as the measurement terminal 12. It will work.

　次いで、図２（ｃ）に示すように、一対の母材１１のうち、一方の母材１１の他側端部１１ｃが抵抗体１０の一方の側面１０ａに溶接により接合され、図示はしないが、同様に、一対の母材１１のうち、他方の母材１１の他側端部１１ｃが抵抗体１０の他方の側面１０ｂに溶接により接合される。これにより、一対の母材１１が、抵抗体１０を挟むように抵抗体１０と一体的に形成され、もって、図１（ａ）に示すような、シャント抵抗器１が製造されることとなる。 Next, as shown in FIG. 2C, the other end 11c of one of the pair of base materials 11 is joined to one side surface 10a of the resistor 10 by welding, which is not illustrated. Similarly, the other side end 11 c of the other base material 11 of the pair of base materials 11 is joined to the other side surface 10 b of the resistor 10 by welding. Thus, the pair of base materials 11 is integrally formed with the resistor 10 so as to sandwich the resistor 10, whereby the shunt resistor 1 as shown in FIG. 1A is manufactured. .

　しかして、以上説明した本実施形態によれば、母材１１の長手方向に沿う中心軸線Ｏ上に位置する母材１１の他側端部１１ｃ側（抵抗体１０の接合部側）の一部に、長手方向に沿うように逆コ字形状の貫通孔１１ｄを上下方向に貫通して切断加工し、その切断加工によって形成される逆コ字形状部分１１ｅを、その逆コ字形状部分１１ｅの基端部１１ｅ１を基点として、抵抗体１０側に折り曲げ形成することによって、測定端子１２を形成し、もって、この測定端子１２を母材１１のそれぞれに起立状に立設固定するようにしている。これにより、従来のシャント抵抗器のように、母材１１と測定端子１２とを別々に製造していないため、母材１１に測定端子１２を溶接等によって接合する必要がなくなる。それゆえ、本実施形態によれば、従来のシャント抵抗器のような接合部分がないため、接合部分の抵抗が大きくなることがなく、もって、発熱を抑えることができることとなる。 Therefore, according to the present embodiment described above, a part of the other side end 11 c side (junction portion side of the resistor 10) of the base material 11 located on the central axis O along the longitudinal direction of the base material 11 The through-hole 11d in the reverse U-shape is vertically penetrated and cut along the longitudinal direction, and the reverse U-shaped portion 11e formed by the cutting process is The measurement terminal 12 is formed by bending it toward the resistor 10 with the base end 11e1 as a base point, and the measurement terminal 12 is erected and fixed to each of the base materials 11 . Thus, unlike the conventional shunt resistor, since the base material 11 and the measurement terminal 12 are not separately manufactured, it is not necessary to join the measurement terminal 12 to the base material 11 by welding or the like. Therefore, according to the present embodiment, since there is no joint portion as in the conventional shunt resistor, the resistance of the joint portion does not increase, and heat generation can be suppressed.

　さらに、本実施形態によれば、従来のシャント抵抗器のように、母材１１に測定端子１２を溶接等によって接合する必要がなくなるため、製造工程を削減することができ、もって、コストを削減することができることとなる。 Furthermore, according to the present embodiment, as in the conventional shunt resistor, there is no need to join the measurement terminal 12 to the base material 11 by welding or the like, so the manufacturing process can be reduced, thereby reducing the cost. It will be possible to do.

　ところで、測定端子１２は、図１に示すように、抵抗体１０の近傍に設ける必要がある。これは、抵抗体１０の近傍に測定端子１２を設けるようにすれば、電流測定時のノイズ等を軽減でき、もって、電流測定の検出精度を向上させることができるためである。それゆえ、測定端子１２は、抵抗体１０の近傍に設ける必要がある。この点、本実施形態によれば、母材１１の長手方向に沿う中心軸線Ｏ上に位置する母材１１の他側端部１１ｃ側（抵抗体１０の接合部側）の一部に、長手方向に沿うように逆コ字形状の貫通孔１１ｄを上下方向に貫通して切断加工することによって、測定端子１２を形成するものであるから、抵抗体１０の極めて近傍に測定端子１２を精度よく設けることができる。それゆえ、本実施形態によれば、従来に比べ、電流測定の検出精度を向上させることができることとなる。 By the way, the measurement terminal 12 needs to be provided in the vicinity of the resistor 10 as shown in FIG. This is because by providing the measurement terminal 12 in the vicinity of the resistor 10, it is possible to reduce noise and the like at the time of current measurement, and to improve detection accuracy of the current measurement. Therefore, the measurement terminal 12 needs to be provided in the vicinity of the resistor 10. In this respect, according to the present embodiment, a part of the other side end 11 c side (the joint side of the resistor 10) of the base material 11 located on the central axis O along the longitudinal direction of the base material 11 is elongated Since the measurement terminal 12 is formed by vertically penetrating the reverse U-shaped through hole 11d along the direction to form the measurement terminal 12, the measurement terminal 12 is precisely located in the vicinity of the resistor 10 with high accuracy. It can be provided. Therefore, according to the present embodiment, the detection accuracy of the current measurement can be improved as compared with the conventional case.

　なお、本実施形態において例示したシャント抵抗器１、抵抗体１０、母材１１、測定端子１２の形状はあくまで一例であり、特許請求の範囲に記載された本発明の要旨の範囲内において種々の変形・変更が可能である。例えば、測定端子１２を形成するにあたって、本実施形態においては、逆コ字形状の貫通孔１１ｄを上下方向に貫通して切断加工して形成するようにしたが、それに限らず、逆Ｕ字形状の貫通孔１１ｄを上下方向に貫通して切断加工して形成するようにしても良く、どのような形状にしても良い。 The shapes of the shunt resistor 1, the resistor 10, the base material 11, and the measurement terminal 12 illustrated in the present embodiment are merely examples, and various shapes may be used within the scope of the present invention described in the claims. Modifications and changes are possible. For example, when forming the measurement terminal 12, in the present embodiment, the reverse U-shaped through hole 11d is vertically penetrated and cut and formed, but the present invention is not limited thereto. The through holes 11d may be formed by cutting through the through holes 11d in the vertical direction, and any shape may be used.

　また、本実施形態によれば、母材１１にボルト孔１１ｂ、貫通孔１１ｄを形成するにあたって、パンチプレス加工にて形成する例を示したが、それに限らず、ワイヤー放電加工等どのような加工でも良い。 Further, according to the present embodiment, an example in which the bolt holes 11b and the through holes 11d are formed in the base material 11 by punch press processing has been described. However, the present invention is not limited thereto. But it is good.

　さらに、本実施形態によれば、母材１１の長手方向に沿う中心軸線Ｏ上に位置する母材１１の他側端部１１ｃ側（抵抗体１０の接合部側）の一部に、長手方向に沿うように逆コ字形状の貫通孔１１ｄを上下方向に貫通して切断加工し、測定端子１２を形成するようにしたが、それに限らず、母材１１の長手方向に沿う中心軸線Ｏ上の位置からずれた位置に貫通孔１１ｄを上下方向に貫通して切断加工し、測定端子１２を形成するようにしても良い。しかしながら、母材１１の長手方向に沿う中心軸線Ｏ上の位置に貫通孔１１ｄを上下方向に貫通して切断加工し、測定端子１２を形成した方が好ましい。このようにすれば、抵抗体１０の発熱を抑えつつ均一化することができるためである。しかるに、抵抗体１０の発熱を抑えつつ均一化することができれば、発熱による抵抗体１０の抵抗値の変化がなくなり、もって、正確に電流値を計測することができることとなる。 Furthermore, according to the present embodiment, the longitudinal direction is a part of the other side end 11 c side (the joint side of the resistor 10) of the base material 11 located on the central axis O along the longitudinal direction of the base material 11. The through-hole 11d in the reverse U-shape is vertically penetrated and cut to form the measurement terminal 12, but the present invention is not limited thereto, but the central axis O along the longitudinal direction of the base material 11 is The measurement terminal 12 may be formed by cutting through the through hole 11 d in the vertical direction at a position shifted from the position of. However, it is preferable to form the measuring terminal 12 by vertically penetrating the through hole 11 d at a position on the central axis O along the longitudinal direction of the base material 11. This is because the heat generation of the resistor 10 can be suppressed and uniformity can be achieved. However, if uniformization can be performed while suppressing the heat generation of the resistor 10, the change in the resistance value of the resistor 10 due to the heat generation disappears, and it is possible to accurately measure the current value.

　ここで、母材１１の長手方向に沿う中心軸線Ｏ上の位置に貫通孔１１ｄを上下方向に貫通して切断加工し、測定端子１２を形成した際、抵抗体１０の発熱を抑えつつ均一化することができるか否かを検証するため、以下の実験を行った。 Here, when the through hole 11d is vertically penetrated and cut at a position on the central axis O along the longitudinal direction of the base material 11, and the measurement terminal 12 is formed, the heat generation of the resistor 10 is suppressed and equalization is achieved. The following experiment was conducted to verify whether it was possible or not.

＜実験例＞
　すなわち、図３に示すように、シャント抵抗器１の一対の母材１１の一側端部１１ａ側に、松定プレシジョン社製ＰＲＫ１５－８００の電源を電気的に接続し、２００Ａの電流を矢印Ｙ１０方向に３６００秒間、連続で流し続けた。そして、この時の抵抗体１０の発熱を計測すべく、熱電対からなる温度センサＳを抵抗体１０に貼り付け計測を行った。その結果が、図４（ａ）に示すものである。なお、抵抗体１０の抵抗値は、０．１ｍΩに設定されている。 <Example of experiment>
That is, as shown in FIG. 3, the power supply of PRS15-800 made by Matsuda Precision Co., Ltd. is electrically connected to one side end 11a of the pair of base materials 11 of the shunt resistor 1, and the current of 200A is an arrow. The flow was continued continuously for 3600 seconds in the Y10 direction. And in order to measure heat_generation | fever of the resistor 10 at this time, the temperature sensor S which consists of thermocouples was affixed on the resistor 10, and it measured. The result is shown in FIG. 4 (a). The resistance value of the resistor 10 is set to 0.1 mΩ.

　図４（ａ）に示すように、シャント抵抗器１の抵抗体１０の発熱は、最大値が１２７．１４２ｄｅｇで全体的に均一という結果となった。 As shown in FIG. 4A, the heat generation of the resistor 10 of the shunt resistor 1 resulted in being uniformly uniform at a maximum value of 127.142 deg.

　次に、母材１１の長手方向に沿う中心軸線Ｏ上の位置からずれた位置に貫通孔１１ｄを上下方向に貫通して切断加工し、測定端子１２を形成した際、抵抗体１０がどのように発熱するか検証すべく、図４（ｂ）に示すようなシャント抵抗器１Ａを製造した。このシャント抵抗器１Ａは、母材１１の長手方向に沿う中心軸線Ｏ上の位置からずれた位置（図示では、上方向の位置）に測定端子１２を形成している点が、図３に示すシャント抵抗器１と相違するだけで、それ以外は同一である。そのため、図４（ｂ）では、図３に示すシャント抵抗器１と同一構成については、同一の符号を付している。 Next, when the through hole 11d is vertically penetrated and cut at a position deviated from the position on the central axis O along the longitudinal direction of the base material 11, when the measurement terminal 12 is formed, how the resistor 10 is In order to verify whether or not heat is generated, a shunt resistor 1A as shown in FIG. 4 (b) was manufactured. This shunt resistor 1A is shown in FIG. 3 in that the measurement terminal 12 is formed at a position deviated from the position on the central axis O along the longitudinal direction of the base material 11 (in the figure, the position in the upward direction). The difference is the same as the shunt resistor 1 except the same. Therefore, in FIG. 4B, the same components as those of the shunt resistor 1 shown in FIG. 3 are denoted by the same reference numerals.

　かくして、このようなシャント抵抗器１Ａの一対の母材１１の一側端部１１ａ側に、図３と同様に、松定プレシジョン社製ＰＲＫ１５－８００の電源を電気的に接続し、２００Ａの電流を矢印Ｙ１０（図３参照）方向に３６００秒間、連続で流し続けた。そして、この時の抵抗体１０の発熱を計測すべく、熱電対からなる温度センサＳ（図３参照）を抵抗体１０に貼り付け計測を行った。その結果が、図４（ｂ）に示すものである。 Thus, as in the case of FIG. 3, the power supply of the Matsuda Precision PRK 15-800 is electrically connected to one side end 11a of the pair of base materials 11 of such a shunt resistor 1A, and a current of 200 A Was continuously flowed in the direction of arrow Y10 (see FIG. 3) for 3600 seconds. And in order to measure heat_generation | fever of the resistor 10 at this time, the temperature sensor S (refer FIG. 3) which consists of thermocouples was affixed on the resistor 10, and it measured. The result is shown in FIG. 4 (b).

　図４（ｂ）に示すように、抵抗体１０の発熱は、最大値が１２７．５５７ｄｅｇで、長手方向に向うに従い（測定端子１２から遠ざかるに従い）発熱温度が高くなるという結果となった。すなわち、抵抗体１０の発熱にばらつきがあるという結果となった。 As shown in FIG. 4B, the heat generation of the resistor 10 has a maximum value of 127.557 deg, and the heat generation temperature becomes higher as it goes in the longitudinal direction (as it gets farther from the measurement terminal 12). That is, the heat generation of the resistor 10 is uneven.

　次に、母材１１に測定端子１２を形成しない際、抵抗体１０がどのように発熱するかを検証すべく、図４（ｃ）に示すようなシャント抵抗器１Ｂを製造した。このシャント抵抗器１Ｂは、母材１１に測定端子１２を形成していない点が、図３に示すシャント抵抗器１と相違するだけで、それ以外は同一である。そのため、図４（ｃ）では、図３に示すシャント抵抗器１と同一構成については、同一の符号を付している。 Next, in order to verify how the resistor 10 generates heat when the measurement terminal 12 is not formed on the base material 11, a shunt resistor 1B as shown in FIG. 4C was manufactured. The shunt resistor 1B is the same as the shunt resistor 1 shown in FIG. 3 except that the measurement terminal 12 is not formed on the base material 11, and is otherwise identical. Therefore, in FIG. 4C, the same components as those of the shunt resistor 1 shown in FIG. 3 are denoted by the same reference numerals.

　かくして、このようなシャント抵抗器１Ｂの一対の母材１１の一側端部１１ａ側に、図３と同様に、松定プレシジョン社製ＰＲＫ１５－８００の電源を電気的に接続し、２００Ａの電流を矢印Ｙ１０（図３参照）方向に３６００秒間、連続で流し続けた。そして、この時の抵抗体１０の発熱を計測すべく、熱電対からなる温度センサＳ（図３参照）を抵抗体１０に貼り付け計測を行った。その結果が、図４（ｃ）に示すものである。 Thus, as in the case of FIG. 3, the power supply of the Matsuda Precision PRK 15-800 is electrically connected to one side end 11a of the pair of base materials 11 of such a shunt resistor 1B, and a current of 200 A Was continuously flowed in the direction of arrow Y10 (see FIG. 3) for 3600 seconds. And in order to measure heat_generation | fever of the resistor 10 at this time, the temperature sensor S (refer FIG. 3) which consists of thermocouples was affixed on the resistor 10, and it measured. The result is shown in FIG. 4 (c).

　図４（ｃ）に示すように、抵抗体１０の発熱は、最大値が１３７．９４６ｄｅｇで、全体的に均一という結果となった。しかしながら、抵抗体１０の発熱は、図４（ａ）に示す抵抗体１０の発熱に比べ、明らかに高い温度で発熱するという結果となった。 As shown in FIG. 4C, the heat generation of the resistor 10 resulted in being uniform overall with a maximum value of 137.946 deg. However, the heat generation of the resistor 10 results in generation of heat at a significantly higher temperature than the heat generation of the resistor 10 shown in FIG. 4 (a).

　以上の実験結果から、母材１１の長手方向に沿う中心軸線Ｏ上の位置に貫通孔１１ｄを上下方向に貫通して切断加工し、測定端子１２を形成するようにすれば、抵抗体１０の発熱を抑えつつ均一化することができることが証明された。しかるに、このように母材１１の長手方向に沿う中心軸線Ｏ上の位置に貫通孔１１ｄを上下方向に貫通して切断加工し、測定端子１２を形成することにより、抵抗体１０の発熱を抑えつつ均一化できるのは、母材１１の長手方向に沿う中心軸線Ｏ上の位置に貫通孔１１ｄを上下方向に貫通して切断加工し、測定端子１２を形成することにより生じる空気の流れが抵抗体１０全体に行き渡り、もって、抵抗体１０全体の熱が放熱され、これによって、抵抗体１０の発熱が抑えられ、均一化されたものと推測される。 From the above experimental results, it is possible to form the measuring terminal 12 by cutting the through hole 11 d vertically at a position on the central axis O along the longitudinal direction of the base material 11 to form the measuring terminal 12. It has been proved that uniformity can be achieved while suppressing heat generation. However, as described above, the through hole 11 d is vertically cut at a position on the central axis O along the longitudinal direction of the base material 11 to form the measurement terminal 12, thereby suppressing the heat generation of the resistor 10. However, it can be made uniform by cutting through the through hole 11d vertically at a position on the central axis O along the longitudinal direction of the base material 11, and the air flow generated by forming the measuring terminal 12 is a resistance It is assumed that the heat of the entire resistor 10 is dissipated by spreading over the entire body 10, whereby the heat generation of the resistor 10 is suppressed and the heat is made uniform.

　ところで、母材１１の長手方向に沿う中心軸線Ｏ上の位置に貫通孔１１ｄを上下方向に貫通して切断加工し、測定端子１２を形成した際、貫通孔１１ｄを形成することにより、母材１１の断面積が従来のシャント抵抗器に比べ減少することとなる。一般的に、シャント抵抗器に１Ａの電流を流す際、母材の断面積として０．１ｍ２が必要とされている。そのため、母材１１の断面積が従来のシャント抵抗器に比べ減少すると、大電流を流した際何らかの問題が発生する可能性もある。そこで、そのような問題が発生する可能性がないようにするため、母材１１の断面積を従来のシャント抵抗器の母材の断面積と同一にすべく、図５に示すシャント抵抗器１Ｃのようにすることができる。 By the way, when the through hole 11d is vertically penetrated at a position on the central axis O along the longitudinal direction of the base material 11 and cut and processed to form the measurement terminal 12, the base material is formed by forming the through hole 11d. The cross-sectional area of 11 will be reduced compared to the conventional shunt resistor. Generally, when a current of 1 A is applied to the shunt resistor, 0.1 m 2 is required as the cross-sectional area of the base material. Therefore, if the cross-sectional area of the base material 11 is reduced as compared with the conventional shunt resistor, some problems may occur when a large current flows. Therefore, in order to prevent the occurrence of such a problem, in order to make the cross-sectional area of base material 11 the same as the cross-sectional area of the base material of the conventional shunt resistor, the shunt resistor 1C shown in FIG. It can be like that.

　このシャント抵抗器１Ｃは、図５に示すように、一対の母材１１Ａの一側端部１１ａ側の幅方向の形状より、他側端部１１ｃ側の幅方向の形状を膨出した形状にしたものである。すなわち、一対の母材１１Ａの形状を、ボルト孔１１ｂが形成されている一側端部１１ａ側の幅Ｗ１よりも、貫通孔１１ｄが形成されている他側端部１１ｃ側の幅Ｗ２を幅広に形成したものである。これにより、貫通孔１１ｄを形成した分減少した断面積を補填することができ、もって、従来のシャント抵抗器の母材の断面積と同一にすることができる。なお、図５に示すシャント抵抗器１Ｃと図１に示すシャント抵抗器１の相違は、図５に示す母材１１Ａの形状と図１に示す母材１１の形状の相違だけであり、それ以外は同一である。そのため、図５では、図１に示すシャント抵抗器１と同一構成については、同一の符号を付している。 As shown in FIG. 5, the shunt resistor 1C has a shape in which the shape in the width direction on the other side end 11c side is bulged from the shape in the width direction on the one side end 11a side of the pair of base materials 11A. It is That is, the shape of the pair of base members 11A is wider than the width W1 on one side end 11a where the bolt hole 11b is formed, and the width W2 on the other side end 11c where the through hole 11d is formed. It is formed in As a result, it is possible to compensate for the reduced cross-sectional area corresponding to the formation of the through hole 11d, and to make it equal to the cross-sectional area of the base material of the conventional shunt resistor. The difference between the shunt resistor 1C shown in FIG. 5 and the shunt resistor 1 shown in FIG. 1 is only the difference between the shape of the base material 11A shown in FIG. 5 and the shape of the base material 11 shown in FIG. Are identical. Therefore, in FIG. 5, the same components as those of the shunt resistor 1 shown in FIG. 1 are denoted by the same reference numerals.

　本実施形態において例示したシャント抵抗器１，１Ｃは、特に、電気自動車（ＥＶ車）、ハイブリット車（ＨＶ車）、プラグインハイブリット車（ＰＨＶ車）等で使用される高電圧用途のバッテリーからモータ回路へ大電流が流れる電流経路の電流値を計測する際に用いるのが有用である。 The shunt resistors 1 and 1C illustrated in the present embodiment are particularly suitable for use in batteries for high voltage applications used in electric vehicles (EV vehicles), hybrid vehicles (HV vehicles), plug-in hybrid vehicles (PHV vehicles), etc. It is useful to measure the current value of the current path through which a large current flows to the circuit.

１，１Ｃ　　　シャント抵抗器
１０　　　　　抵抗体
１１，１１Ａ　母材
１１ｄ　　　　貫通孔
１１ｅ　　　　逆コ字形状部分（切断加工した所定形状部分）
１２　　　　　測定端子
Ｏ　　　　　　中心軸線
  1, 1C Shunt resistor 10 Resistor 11, 11A Base material 11d Through hole 11e reverse U-shaped portion (predetermined shape portion cut and processed)
12 Measuring terminal O central axis

Claims (2)

　抵抗体と、
　前記抵抗体を挟んで当該抵抗体に一体的に形成された一対の母材と、
　前記母材の所定箇所の一部を所定形状に切断加工し、その切断加工した所定形状部分を前記抵抗体側に折り曲げ形成することによって、当該母材に起立状に立設固定された測定端子と、を有してなるシャント抵抗器。 With a resistor,
A pair of base materials integrally formed on the resistor with the resistor interposed therebetween;
A measurement terminal which is erected and fixed on the base material by cutting and processing a part of a predetermined portion of the base material into a predetermined shape and bending the cut-off predetermined shape portion toward the resistor. , A shunt resistor. 　前記測定端子は、前記母材の長手方向に沿う中心軸線上に位置する所定箇所の一部を所定形状に切断加工し、その切断加工した所定形状部分を前記抵抗体側に折り曲げ形成することによって、当該母材に起立状に立設固定されてなる請求項１に記載のシャント抵抗器。
  The measurement terminal is formed by cutting and processing a portion of a predetermined portion located on a central axis along the longitudinal direction of the base material into a predetermined shape, and bending the cut portion toward the resistor. The shunt resistor according to claim 1, wherein the shunt resistor is erected and fixed to the base material.
PCT/JP2018/038344 2017-11-15 2018-10-15 Shunt resistor Ceased WO2019097925A1 (en)

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US20220102032A1 (en) * 2019-08-13 2022-03-31 Lg Energy Solution, Ltd. Shunt Resistor Module
WO2024256116A1 (en) * 2023-06-14 2024-12-19 Wieland-Werke Ag Method for producing a resistor arrangement having a contact element, and resistor arrangement having a contact element
FR3153421A1 (en) 2023-09-27 2025-03-28 Commissariat à l'Energie Atomique et aux Energies Alternatives Manufacturing process of an electric current sensor by additive manufacturing
USD1069711S1 (en) 2021-05-11 2025-04-08 Vishay Dale Electronics, Llc Resistor

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JP2003518763A (en) * 1999-12-29 2003-06-10 ヴィシェイ デイル エレクトロニクス，インコーポレイテッド Integrated heat dissipation type resistor
JP2005181056A (en) * 2003-12-18 2005-07-07 Microjenics Inc Resistor for current detection

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220102032A1 (en) * 2019-08-13 2022-03-31 Lg Energy Solution, Ltd. Shunt Resistor Module
US11961642B2 (en) * 2019-08-13 2024-04-16 Lg Energy Solution, Ltd. Shunt resistor module
WO2022039808A1 (en) 2020-08-20 2022-02-24 Vishay Dale Electronics, Llc Resistors, current sense resistors, battery shunts, shunt resistors, and methods of making
EP4197011A4 (en) * 2020-08-20 2024-03-06 Vishay Dale Electronics, LLC Resistors, current sense resistors, battery shunts, shunt resistors, and methods of making
US12196783B2 (en) 2020-08-20 2025-01-14 Vishay Dale Electronics, Llc Resistors, current sense resistors, battery shunts, shunt resistors, and methods of making
USD1069711S1 (en) 2021-05-11 2025-04-08 Vishay Dale Electronics, Llc Resistor
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FR3153421A1 (en) 2023-09-27 2025-03-28 Commissariat à l'Energie Atomique et aux Energies Alternatives Manufacturing process of an electric current sensor by additive manufacturing
EP4530639A1 (en) 2023-09-27 2025-04-02 Commissariat à l'Energie Atomique et aux Energies Alternatives Method for manufacturing an electric current sensor by additive manufacturing

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