Resistor for detecting current

Abstract

Resistor for detecting current having the following: a resistance body (11); a pair of electrodes (12) attached to each end of the resistance body (11); and a pair of voltage terminals (3) for detecting voltage generated in the resistance body (11) and connected to each electrode (12); wherein each voltage connection member (3) has a connecting part (3b) for connecting to the respective electrode (12), a first elongated part (3c1) extending from the connecting part (3b) toward the side of the other electrode (12), a second elongated part (3c2) extending from the first elongated part (3c1) in a direction at right angles to the direction in which the electrodes (12) are arranged, and a voltage connection part (3a) extending vertically at one end of the second elongated part (3c2); and wherein each end of the first elongated part (3c1) extends to the same plane (X) perpendicular to the current path between the electrodes (12).

Description

Technical area

[0001] The present invention relates to a resistor for detecting current, and more particularly, it relates to the resistor having a voltage terminal member that receives voltage developed between the two ends of the resistor body by the current to be detected while flowing through the resistor. State of the art

[0002] A resistor for current detection has been used for monitoring the charging and discharging current of a battery, controlling the charging and discharging current of the battery, and so on. The resistor is inserted in the path of the current to be monitored. The voltage generated at both ends of the resistor is detected, and the current is detected from the already known resistance value. A structure of a voltage detection circuit for detecting the voltage generated between the two ends of the resistor was proposed in JP 2003-1211461 A.

[0003] Here, it is described that an error voltage is caused by a tiny amount of self-inductance present in a surface-mounted resistor, and the error voltage can be canceled by the voltage generated by mutual inductance formed on the voltage detection wiring structure arranged along the central axis of the resistor. Therefore, according to the wiring structure, the error voltage based on the self-inductance of the resistor can be prevented from affecting the detected voltage of the resistor (see Fig. 3, paragraph 0016-0021 of JP 2003-1211461 A).

[0004] However, a resistor for detecting a large current is generally large, and the resistor may not be able to be mounted on the surface of a voltage detection circuit board, etc. Therefore, there are cases where the use of the above-mentioned wiring structure becomes difficult.

[0005] Furthermore, US 2005 / 0 024 806 A1 and JP H06 - 186 254 A each show a resistor for detecting current with different voltage terminals to detect the voltage between electrodes of the resistor. Summary of the inventionTechnical problem

[0006] The invention was made based on the above-mentioned circumstances. Therefore, the object of the invention is to provide a resistor having a voltage terminal capable of removing the influence of the error voltage caused by the minute self-inductance present in the resistor. Solution to the problem

[0007] According to the invention, a resistor according to claim 1 is provided. Further embodiments emerge, inter alia, from the subclaims. The resistor comprises the following: a resistance body, a pair of electrodes attached to each end of the resistance body, and a pair of voltage terminal members for detecting voltage generated in the resistance body and connected to each electrode. Each voltage terminal member has a connecting part for connecting to the respective electrode, a first elongated part extending from the connecting part toward the side of the other electrode, a second elongated part extending from the first elongated part in a direction perpendicular to the direction in which the electrodes are arranged, and a voltage terminal part extending vertically at one end of the second elongated part.One end of each elongated part extends to a same plane perpendicular to the current path between the electrodes.

[0008] According to the invention, since the voltage terminal member has a connecting part to one electrode and an elongated part extending from the connecting part toward the other electrode side, and since one end of each elongated part reaches a same plane perpendicular to the current path between the electrodes, the voltage terminal parts formed at each end of the elongated parts can be arranged in a same plane perpendicular to the current path. Therefore, the magnetic flux Φ generated by the current to be monitored flowing through the resistance body is formed in the circumferential direction around the current, so that it does not affect or intersect the same plane as the pair of voltage terminal parts. Therefore, when a loop having the voltage terminal parts is formed, the voltage terminal parts are arranged according to connection situations, etc.changes, the effective inductance Le does not change because the loop is not affected by the magnetic flux Φ, and the error voltage caused by the self-inductance L present in the resistor can be compensated by the low-pass filter having a time constant. Short description of the drawings Fig. 1 is a perspective view showing an assembled state of the resistor of an embodiment of the invention. Fig. 2 is an exploded perspective view of the voltage terminal. Fig. 3 is an exploded perspective view showing a state of attaching the voltage terminal member and the insulating member to the resistor. Fig. 4 is a view and a perspective view showing a method of forming the voltage terminal member. Fig. Figure 5A is a rough front view (partially cutaway view) of the resistor having the voltage terminals in an assembled state. Fig. Figure 5B is a rough side view (partially cutaway view) of the resistor having the voltage terminals in an assembled state. Fig. Figure 5C is a perspective view of the main part of the resistor. Fig. 5D is a perspective view of a variation of the voltage detection part in Fig. 5C. Fig. 5E is a perspective view of another variation of the voltage detection part in Fig. 5C. Fig. Figure 6 is an explanatory diagram of the effective inductance Le. Fig. Figure 7 is an explanatory diagram showing that the error voltage caused by the effective inductance Le can be canceled by the low-pass filter acting there. Fig. Figure 8 is a perspective view of the resistor using another voltage terminal. Fig. 9 is an explanatory diagram of the resistor of the first embodiment. Fig. 10 is an explanatory view of the resistor of the second embodiment. Fig. 11 is an explanatory diagram of the resistor of the third embodiment. Fig. 12 is an explanatory diagram of the resistor of the fourth embodiment. Description of the embodiments

[0009] Embodiments of the invention are described below with reference to Fig. 1 to Fig. 12. Similar or corresponding parts or elements are designated and described by like reference numerals throughout the views.

[0010] Fig. Fig. 1 shows an assembled state of the resistor for detecting current of one embodiment of the invention. The resistor includes a columnar or rod-shaped resistor body 11 made of a resistive alloy material such as a Cu-Mn-Ni system alloy or a Cu-Ni system alloy, etc., a pair of square pillar electrodes 12 made of a different material than the resistor body and made of a highly conductive metal material such as copper, etc. (see Fig. 9), and a pair of voltage terminals 3 for detecting voltage generated in the resistor body are connected to each electrode. In the embodiment, the resistor is fixedly attached to the wiring pattern 2 on an aluminum substrate 1 by soldering, etc.

[0011] The voltage terminal member 3 has a voltage terminal portion 3a protruding between both electrodes 12 perpendicular to the substrate 1, and the portion 3a is capable of connecting to the connection terminal 21 formed inside the connecting element 20. The connection terminal 21 is connected to the stranded wire 22 and is further connected to the voltage detection circuit (not shown). That is, the voltage generated by the current to be monitored flowing through the resistance body 11 is transmitted to the voltage detection circuit through the voltage terminal member 3, which is connected to each electrode 12, the connection terminal 21 inside the connecting element 20, and the stranded wire 22. Then, the voltage is detected, and the current value is determined based on the determined resistance value.

[0012] Fig. 2 shows an example of a voltage terminal member including the voltage terminal part. The voltage terminal member 3 includes a connecting part 3b connected to an end face of the electrode 12 of the resistance body side, a first elongated part 3c1 extending from the connecting part toward the other electrode side, a second elongated part 3c2 extending from the first elongated part in a direction perpendicular to the direction in which the electrodes are arranged, and a voltage terminal part protruding vertically from the end of the second elongated part. A concave part O is formed in the connecting part 3b, into which the resistance body can be inserted.

[0013] The insulating material 4 is inserted between the pair of connecting parts 3b of the voltage terminal member so as to insulate the pair of voltage terminal members. The concave part O is formed so as to allow the resistance body to be inserted therein. The pair of voltage terminal members 3 is fixed to the insulating member 4 using adhesive, etc., so that the voltage terminal member 3a can be positioned inside. At this time, lengths of the first elongated part 3c1 and the second elongated part 3c2 are adjusted so that each of the pair of connecting parts 3a is positioned on both sides in the width direction between both electrodes 12 and in the center between the two electrodes 12. Further, the insulating material 4 is made of, for example, a glass epoxy substrate.

[0014] Fig. 3 shows a state in which the voltage terminal member and the insulating member are integrated and installed in the resistor. The insulating member 4, which is engaged between the pair of voltage terminal members 3, is inserted and fixedly attached between opposite end faces 12s of the electrodes 12, with the outer peripheries of the resistor body 11 and the inner periphery of the concave part O of the insulating material 4 being matched. Accordingly, since the connecting part 3b of the voltage terminal member 3 abuts against the end face 12c of the electrode 12 on the resistor body side, the influence of the resistance of the electrode 12 becomes very small, and high accuracy of voltage detection can be achieved based on the actual resistance value of the resistor.

[0015] The voltage terminal member 3 includes: the connecting part 13b for abutting against the end surface 12s of the electrode 12 on the resistance body side, the first elongated part 3c1 extending from the connecting part 13b toward the other electrode side, the second elongated part 3c2 extending from the end of the first elongated part in a direction perpendicular to the direction in which the electrodes are arranged, and a voltage terminal part 3a projecting vertically at the end of the second elongated part.

[0016] Fig. 4 shows a method for forming the voltage terminal member. First, a copper plate, etc., is punched, and a metal plate material having the shape shown in the left view is formed. The plate material is bent at a right angle along the fold line Y1 and bent in the opposite direction at a right angle along the fold line Y2. Further, the plate material is bent again at a right angle along the fold lines Y3 and Y4 in the same direction. As a result, as shown in the right view, the voltage terminal member 3 is formed, which has the voltage terminal part 3a that can be inserted into the connection terminal 21 of the connector 20.

[0017] Fig. Figure 5A shows a rough front view (in partial cross-section) of the resistor in the assembled state, Fig. Figure 5B shows a rough side view (in partial cross-section) and Fig. Figure 5C shows its essential part. The pair of resistor electrodes 12 are fixedly mounted on the wiring board 2 on the aluminum substrate 1. The end face of the columnar (circular in cross section) resistor element 11 abuts the square pillar-shaped (rectangular in cross section) electrode 12 at the center of its end face and is connected by welding.

[0018] The connecting part 3b of the voltage connecting member 3 is fixedly attached to an end surface 12s of the electrode 12 on the resistance body side, and the first elongated part 3c1 extends to approximately the middle position between the electrodes 12. A second elongated part 3c2 extends in a direction perpendicular to the direction in which the electrodes 12 are arranged, and the voltage connecting part 3a protrudes vertically at its end. Accordingly, both voltage connecting parts 3a are arranged at a middle position between the electrodes 12 and arranged in the same plane X, which is perpendicular to the current path (see Fig. 5C).

[0019] That is, in Fig. 5C, the letter X denotes the plane perpendicular to the current path between the electrodes 12. The elongated part of the voltage connection member 3, i.e., each end of the first elongated parts 3c1 and / or each end of the second elongated parts 3c2, reaches the same plane X perpendicular to the current path between the electrodes 12. And each voltage connection part 3a protrudes into the same plane X. Here, current path means the main path of the current in the resistance body of the resistor, i.e., the resistance body itself in its axial direction. Furthermore, the axial direction of the resistance body 11 coincides with the x-axis of the coordinate axis in Fig. 5C - Fig. 5E together. And the X-plane is formed by the y-axis and the z-axis, which are perpendicular to the x-axis.

[0020] Furthermore, the voltage connection part 3a may not protrude into the plane X, which is perpendicular to the current path. For example, Fig. 5D shows an example in which the pair of voltage detection terminals 3a were inclined at the same angle to the plane X. And Fig. 5E shows another example in which the upper part of the pair of voltage detection terminals 3a is bent at the same angle, approximately perpendicular to the plane X. If it is necessary to bend the upper part of the pair of voltage detection terminals 3a, it is preferable to bend them at a distance from the resistor body.

[0021] In the example shown in Fig. 5D, the pair of voltage detection terminals 3a are positioned in a same plane having the same inclination as the plane X perpendicular to the current path, with a line parallel to the z-axis being a rotation axis. In other words, each pair of voltage terminals 3a is inclined based on a line existing in the plane X perpendicular to the current path, thus forming a left and right symmetrical loop. In the example of Fig. 5E, an upper part of the pair of voltage terminal parts 3a is positioned on the same plane perpendicular to the X plane in a line parallel to the z-axis as the rotation axis. As will be described later, since the magnetic flux Φ generated around the current flowing through the resistance body does not affect those planes, no electromotive force is caused in the pair of voltage detection terminals 3a.

[0022] In Fig. 5B, each voltage terminal part 3a, which protrudes on both sides in the width direction at a middle position between the electrodes 12, is inserted into the connecting part 21 of the connecting member 20. The voltage signal detected at both end surfaces of the electrodes 12 is sent from the connecting part 21 of the connecting member 20 via the wire 22 to the voltage detection circuit (not shown), where the current value is detected.

[0023] Here, the magnetic flux Φ, formed by the current I flowing through the resistance body 11, influences the surface S1 (see Fig. 5A), which is formed by the pair of voltage connecting members 3 (connecting parts 3b and first elongated parts 3c1) and the central axis C of the resistance body 11, whereby self-inductance L is caused by the magnetic flux Φ inside the resistance body 11 and an alternating inductance M is generated outside the resistance body 11. As can be seen from the front view of the Fig. 5A, each end of the first elongated part 3c1 is covered, and each voltage connection part 3a is also covered. Therefore, the surface S1 is delimited by the connection part 3b and the first elongated part 3c1 and is unrelated to the voltage connection part 3a.

[0024] As in Fig. As shown in Figure 6, in addition to the detected voltage based on the resistance R of the resistance body 11 by the current I flowing therethrough, an error voltage based on the self-inductance L of the resistance body itself and another voltage based on the alternating inductance M of the pair of voltage connecting members 3 (connecting part 3b and first elongated part 3c1) are superimposed. Here, an inductance on the resistance body 11 side from the output ends A' and B' of the connecting element 20 becomes LM because the voltage generated by the self-inductance L and the voltage generated by the alternating inductance M are formed by the same current I in different directions. Therefore, this is defined as "effective inductance Le" and becomes Le = L - M.

[0025] On the other hand, as in Fig. 5B, an equivalent circuit on the side of the resistance body 11 from the output ends A' and B' of the connecting element 20 has a loop having an area defined by a part of the stranded wire 22, the connecting part 21 of the connecting element and the voltage terminal part 3a and the second elongated part 3c2.

[0026] However, the magnetic flux Φ caused by the current I through the resistance body 11 is formed in a direction along the circumference of the resistance body. Since both voltage connection parts 3a are positioned in the same plane perpendicular to the current path between the electrodes, with the plane having the same inclination to the z-axis as the rotation axis, the magnetic flux Φ does not connect with or affect the loop having the area S2.

[0027] Therefore, any change in impedance components does not occur in the loop of the equivalent circuit viewed from the output ends A' and B' of the connector 20. That is, when the insertion position of the connector 20 into the voltage terminal part 3a is changed and the area S2 changes, a voltage detected at the output ends A' and B' of the connector 20 is not affected.

[0028] The invention is intended to provide a voltage detection circuit capable of removing an influence of an error voltage generated by the self-inductance L of the resistance body itself and capable of detecting a normal voltage based on the resistance R of the resistance body 11. Therefore, as shown in Fig. As shown in Figure 7, the output of the stranded wire 22 is connected to the low-pass filter 24 of the voltage detection circuit. By setting the effective inductance Le to a constant value and matching it with the line constant of the low-pass filter, the influence of the error voltage can be removed as follows.

[0029] Fig. Figure 7 shows the circuit example of the low-pass filter 24 consisting of the resistor r and the capacitance C in the voltage detection circuit. The low-pass filter 24 is connected to the following section of the stranded wire 22 of the connector 20. If it is assumed that the input impedance Zin of the voltage detection circuit, viewed from the output of the connector 20, is sufficiently larger than the resistance impedance, and if it is assumed that the relationship Le / R = C r is obtained for the effective impedance Le (=LM), the resistance R of the resistor body 11, and the capacitance C and resistance r of the low-pass filter 24, then the error voltage can be canceled according to the effective impedance Le.

[0030] That is, the error voltage caused by the current I flowing through the self-inductance L of the resistor 11 is canceled by the alternating inductance M of the first elongated part 3c1 and the low-pass filter 24, and ultimately the error voltage does not appear in the output voltage. Consequently, only the voltage of the product of the resistance R of the resistor body 11 and the current I is taken as the output voltage.

[0031] Consequently, when a sawtooth current flows through the resistor, a large error voltage caused by the resistor's self-inductance L at the peak and trough of the waveform can be removed. And a normal voltage proportional to the sawtooth current I times the resistance R can be sampled.

[0032] According to the resistor of the present invention, regardless of the location where the connecting element 20 is inserted, the surface area S1 is constant as described above, and the effective inductance Le is fixed. Therefore, by combining the low-pass filter with the conduction constant corresponding to Le, highly accurate detection of current containing high-frequency components is possible.

[0033] Fig. Figure 8 shows another example of the voltage connection element. Although the structure of the voltage connection element shown in Fig. 4 is complex, the structure is then simplified. The voltage terminal member 5 includes the connecting part 5b for connecting the electrode 12, the first elongated part 5c1 extending toward the other electrode side from the connecting part, the second elongated part 5c2 extending from the end of the first elongated part in a right-angle direction, and the voltage terminal part 5a projecting vertically from the end of the second elongated part.

[0034] Elongated parts 5c1, 5c2 extend toward the other electrode side from the connecting part 5b, and reach the line L, which is positioned roughly midway between the electrodes 12 perpendicular to the direction in which the electrodes are arranged. The voltage terminal member 5 can be easily formed by punching a sheet, etc., and formed by bending or folding the punched pattern in a manner similar to that shown in FIG. Fig. 4 is shown.

[0035] Next, examples of resistor structures suitable for current detection are described. The resistor body is characterized by being rod-shaped or pillar-shaped between the electrodes, with a diameter of 4 mm or less. By fabricating the resistor body with a thin diameter, the rate of resistance change can be controlled by the skin effect when detecting current at high frequencies. Therefore, highly accurate current detection becomes possible for currents containing high-frequency components. That is, by combining the resistor with excellent frequency characteristics, current detection capable of eliminating the influence of the error voltage caused by inductance components becomes possible over a higher frequency range.

[0036] Fig. 9 shows a structure of the resistor of the first embodiment. The resistor includes a resistance body 11 made of a Cu-Mn-Ni system alloy or a Cu-Ni system alloy, etc., between electrodes made of Cu, etc., and the resistance body 11 is configured to be rod-shaped and have a diameter of 4 mm or less. By making the resistance body 11 thin in diameter, the resistor can detect high-frequency current as well as direct current to some extent by controlling a reduction in the current path due to the skin effect.

[0037] As shown in the diagram, there is a step difference at the connection part between the resistance body 11 and each of the electrodes 12. Consequently, voltage detection terminals can be firmly attached to end surfaces 12s of the electrodes 12 where the resistance body 11 is attached to the surface, and highly accurate current detection based on the actual resistance value becomes possible. Each of the electrodes 12 has a rectangular pillar shape, and the resistance body 11 is attached approximately at the center of the electrode 12 in cross section. By adopting a square pillar-shaped electrode, surface attachment becomes easy and becomes convenient for handling during assembly because there is no upper and lower directionality.

[0038] Each of the electrodes 12 is long in the direction in which the electrodes are arranged and is twice the distance between the electrodes 12, with the resistor body 11 interposed therebetween. Consequently, a mounting area on the circuit boards can be easily secured, and heat radiation can be improved.

[0039] Since the diameter of the resistor body 11 is small, heat radiation from the resistor body 11 becomes important to ensure durability. Furthermore, the electrode 12 has a larger cross-sectional area than the cross-sectional area of ​​the resistor body 11. Consequently, the current path from the wiring pattern to the electrode 12 and the resistor body 11 becomes progressively narrower. This allows excessive load concentration on the resistor body 11 to be suppressed even when measuring a large current.

[0040] The length of the resistor body 11 is less than 1.5 times its diameter. This means that the diameter of the resistor body is made small, such as 4 mm or less, and its length is also shortened. As a result, the resistor becomes suitable for detecting high-frequency currents, and the resistor has a low resistance value, allowing miniaturization. Furthermore, since the diameter of the resistor body 11 is small, the resistance becomes less strong when the resistor body becomes too long.

[0041] Next, the resistance value and size of the resistor or resistance element are described in detail. The resistance value of the resistor is set to 0.1 mΩ or 0.2 mΩ for the design of the product. In the case of a Cu-Mn-Ni alloy wire and the resistance value set to 0.2 mΩ, the following applies: if the diameter Φ is 1 mm, the length N will be 0.36 mm; if the diameter Φ is 2 mm, the length N will be 1.42 mm; and if the diameter Φ is 3 mm, the length N will be 3.2 mm. This means that the length N of the resistor body is made shorter than 1.5 times the diameter Φ.

[0042] For example, when the diameter Φ is 2 mm and the length N is 1.42 mm (for the resistance value of 0.2 mΩ), the length M of the electrode 12 in the direction in which the electrodes are arranged is 5 mm, and the width P of the electrode is 3 mm. By adopting these dimensions, excellent resistance frequency characteristics and excellent heat dissipation can be achieved in a good balance.

[0043] Fig. Figure 10 shows the resistor of the second embodiment. A point of distinction from the first embodiment is that the electrode 12a has a concave portion Q on the connection surface with the resistor body 11, and one end of the resistor body is inserted into the portion Q and fixedly attached. Consequently, positioning of the resistor body during manufacturing becomes easy, and a connection between the resistor body and the electrode can be more easily formed.

[0044] Fig. Figure 11 shows the resistor of the third embodiment. In this embodiment, the electrode 12b is formed in a tubular shape, and the resistor has a structure such that both end portions of the thin resistor body 11 pass through the interior of the electrode 12b. In this embodiment, by making the diameter of the resistor body 11 thin, a change in the resistance value due to the skin effect when high-frequency current flows through it can be suppressed.

[0045] Furthermore, since the resistor has a structure in which the resistance body passes through the interior of the electrode 12b, it is possible to apply a pressing method (a columnar resistance body is inserted into the tube-like electrode, and pressure is applied to the exterior of the electrode, and then the resistance body and the electrode are fixed). Also possible is a shrink-fitting method (expanding a hole of the tube-like electrode by applying heat, inserting the resistance body into the hole, and cooling, and then the electrode and the resistance body are fixed).

[0046] Fig. 12 shows the resistor of the fourth embodiment. In this embodiment, the resistor body includes a columnar resistor body 11 at the central portion and flat resistor bodies 11a at both ends thereof. Plate-shaped electrodes 12c are mounted on both the upper and lower surfaces of the flat resistor body 11a. Therefore, a structure having a thin columnar resistor body at the central portion and square-pillar-shaped electrodes at both ends thereof, as in the above-mentioned embodiments, is provided. In this embodiment, having square-pillar-shaped electrodes 12c provides advantages such as easy surface mounting and improvement in heat radiation, as in the above-mentioned embodiments.

[0047] Furthermore, with respect to the above-mentioned voltage terminal members 3 and 5, the voltage terminal parts 3a, 5a are shown as vertically protruding structures. However, the voltage terminal parts 3a, 5a may not protrude vertically but be flat. By fabricating the connecting part 21 of the connecting element 20 to connect to flat voltage terminal parts 3a, 5a, similar functions and advantages can be achieved.

[0048] Similarly, it is illustrated that the elongated part comprises the first elongated part 3c1, 5c1 extending from the connecting part toward the other electrode side, and the second elongated part 3c2, 5c2 extending from the first elongated part at right angles to the direction in which the electrodes are arranged. However, the elongated part extending from the connecting part toward the other electrode side only needs to reach the straight line L, for example, in the middle between the electrodes 12, which is perpendicular to the direction in which the electrodes are arranged (see Fig. 8), and the voltage connection parts 3a, 5a are formed at both ends, thus similar functions and advantages can be obtained.

[0049] Although the embodiments of the invention have been described, the invention is not limited to the above embodiments and various changes and modifications can be made within the scope of the technical concept of the invention. Industrial applicability

[0050] The invention can be used for resistors to detect current by detecting a voltage between the two ends of the resistor body caused by the current to be monitored. 35158

Claims

[1] Resistor for detecting current, which has the following: a resistance body (11); a pair of electrodes (12) attached to each end of the resistance body (11); and a pair of voltage terminals (3) for detecting voltage generated in the resistance body (11) and connected to each electrode (12); wherein each voltage connection member (3) has a connecting part (3b) for connecting to the respective electrode (12), a first elongated part (3c1) extending from the connecting part (3b) toward the side of the other electrode (12), a second elongated part (3c2) extending from the first elongated part (3c1) in a direction at right angles to the direction in which the electrodes (12) are arranged, and a voltage connection part (3a) extending vertically at one end of the second elongated part (3c2); and wherein each end of the first elongated part (3c1) extends to the same plane (X) perpendicular to the current path between the electrodes (12). [2] A resistor for detecting current according to claim 1, wherein the connecting part (3b) is connected to an end face (12s) of the electrode (12) on the side of the resistance body (11). [3] A current detecting resistor according to claim 1, further comprising an insulating member (4) disposed between the pair of voltage terminal members (3). [4] A resistor for detecting current according to claim 1, wherein the resistance body (11) is configured to be rod-shaped or pillar-shaped between the electrodes (12) and to have a diameter of 4 mm or less.

Images