Shunt resistor and manufacturing method therefor

Abstract

Disclosed is a shunt resistor comprising: a resistive element; a first conductive plate and a second conductive plate that are respectively connected to both ends of the resistive element in the longitudinal direction; and a first voltage detection terminal and the second voltage detection terminal that are connected to the first conductive plate and the second conductive plate, respectively. The first conductive plate includes two first fastening holes (a 1-1 fastening hole and a 1-2 fastening hole) and two first cut portions (a first cut portion in the longitudinal direction and a first cut portion in the width direction). The second conductive plate includes two second fastening holes (a 2-1 fastening hole and a 2-2 fastening hole) and two second cut portions (a second cut portion in the longitudinal direction and a second cut portion in the width direction). According to the present invention, the TCR value can be optimally adjusted according to the length and position of the cut portion of the shunt resistor.

Description

Shunt resistor and method of manufacturing the same

[0001] The present invention relates to a shunt resistor and a method for manufacturing the same, and more specifically, to a shunt resistor for connecting a battery and a method for manufacturing the same.

[0002] The contents presented in this section are intended merely to provide background information for the present invention and do not constitute prior art.

[0003] Shunt resistors are widely used for detecting current and voltage. A shunt resistor comprises a plate-shaped resistor and plate-shaped electrodes bonded to both ends of the resistor. The resistor is composed of alloys such as copper-nickel alloys, copper-manganese alloys, Tetz-chromium alloys, and nickel-chromium alloys. The electrodes are composed of highly conductive metals such as copper.

[0004] For shunt resistors to detect current with minimal temperature fluctuations, a small temperature coefficient of resistivity (TCR) is required. The temperature coefficient of resistivity (TCR) is an indicator representing the rate of change in resistance value due to a change in temperature. To improve the TCR of a shunt resistor, metal alloys such as manganin, which have a small TCR value, can be used as the resistive material.

[0005] However, there are limitations to improving the TCR through the selection of resistor materials. Therefore, the present invention aims to provide a shunt resistor that can easily adjust the TCR without relying on the selection of resistor materials.

[0006] As a technology related to the present invention, a registered Korean patent publication discloses a resistor comprising a first conductive portion, a second conductive portion, and a first resistive element disposed between the two. This related technology is characterized by including an adjustment opening that does not meet the edge of the conductive portion, whereas the present invention is distinguished from the two inventions in terms of structure and effect in that, unlike the adjustment opening, it includes an incision that meets the edge of the conductive portion.

[0007] The problem that the present invention aims to solve is to provide a shunt resistor in which the TCR can be easily adjusted.

[0008] The problem that the present invention aims to solve is to provide a shunt resistor having a relatively small TCR.

[0009] The problem that the present invention aims to solve is to provide a shunt resistor that maintains flatness.

[0010] The problem that the present invention aims to solve is not limited to the problems mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below.

[0011] In order to achieve the above objectives, according to one embodiment of the technical concept of the present invention, a shunt resistor is disclosed, comprising: a resistor; a first conductive plate and a second conductive plate respectively connected to both ends of the resistor in the longitudinal direction; and a first voltage detection terminal and a second voltage detection terminal respectively connected on the first conductive plate and the second conductive plate, wherein the first conductive plate includes two first fastening holes (first-1 fastening holes, first-2 fastening holes) and two first cut sections (first cut sections in the longitudinal direction and first cut sections in the width direction), and the second conductive plate includes two second fastening holes (second-1 fastening holes, second-2 fastening holes) and two second cut sections (second cut sections in the longitudinal direction and second cut sections in the width direction).

[0012] Additionally, the shunt resistor may be configured such that a first longitudinal cut and a first widthwise cut are connected to each other, and a second longitudinal cut and a second widthwise cut are connected to each other.

[0013] Additionally, the shunt resistor may be configured such that the first voltage detection terminal is positioned close to the intersection point where the first longitudinal cut and the first widthwise cut are connected to each other, and the second voltage detection terminal is positioned close to the intersection point where the second longitudinal cut and the second widthwise cut are connected to each other.

[0014] Additionally, the shunt resistor may be configured such that a first cut portion in the width direction is positioned between the first voltage detection terminal and the first fastening hole, and a second cut portion in the width direction is positioned between the second voltage detection terminal and the second fastening hole.

[0015] Additionally, the shunt resistor may be configured such that a first longitudinal cut intersects the edge in the width direction of the first conductive plate, or the first longitudinal cut intersects the edge in the length direction of the first conductive plate, and a second longitudinal cut intersects the edge in the width direction of the second conductive plate, or the second longitudinal cut intersects the edge in the length direction of the second conductive plate.

[0016] Additionally, the shunt resistor may be configured such that a first longitudinal cut is positioned between the two first fastening holes, and a second longitudinal cut is positioned between the two second fastening holes.

[0017] In addition, the shunt resistor can be configured symmetrically with respect to the centerline in the width direction on the resistor.

[0018] In order to achieve the above objectives, according to one embodiment of the technical concept of the present invention, a method for manufacturing a shunt resistor is disclosed, comprising the steps of: joining a first plate material that is the material of a first conductive plate, a second plate material that is the material of a second conductive plate, and a third plate material that is the material of a resistor; forming fastening holes in the first conductive plate and the second conductive plate and cutting the joined plates into individual pieces; connecting voltage detection terminals to the first conductive plate and the second conductive plate and forming one of the cut portions in the length direction and the width direction; and adjusting the resistance temperature coefficient by forming the remaining cut portion among the cut portions in the width direction and the length direction.

[0019] Specific details of other embodiments are included in "Specific details for implementing the invention" and the attached "drawings".

[0020] The advantages and / or features of the present invention and the methods for achieving them will become clear by referring to the various embodiments described below in detail together with the accompanying drawings.

[0021] However, it should be understood that the present invention is not limited to the configurations of each embodiment disclosed below, but may be implemented in various different forms, and that each embodiment disclosed in this specification is provided merely to make the disclosure of the present invention complete and to fully inform those skilled in the art of the scope of the present invention, and that the present invention is defined only by the scope of each claim of the claims.

[0022] According to the present invention, the TCR of a shunt resistor can be easily adjusted.

[0023] In addition, the shunt resistor can be made to have a relatively small TCR.

[0024] In addition, the flatness of the shunt resistor can be maintained.

[0025] The effects obtainable by the shunt resistor and the method for manufacturing the shunt resistor according to the technical concept of the present invention are not limited to the effects mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present invention belongs from the description below.

[0026] FIG. 1 is an exemplary diagram of a shunt resistor according to a first embodiment of the present invention.

[0027] FIG. 2 is an exemplary diagram of a shunt resistor according to a second embodiment of the present invention.

[0028] FIG. 3 is an exemplary diagram of a shunt resistor according to a third embodiment of the present invention.

[0029] FIG. 4 is a chart of the resistance change rate of a shunt resistor according to embodiments of the present invention.

[0030] FIG. 5 is a flowchart of a method for manufacturing a shunt resistor according to one embodiment of the present invention.

[0031] Before describing the present invention in detail, it should be understood that the terms and words used in this specification should not be interpreted as being limited to their ordinary or dictionary meanings, and that the inventor of the present invention may appropriately define and use the concepts of various terms to best describe their invention, and furthermore, that these terms and words should be interpreted in a meaning and concept consistent with the technical spirit of the present invention.

[0032] In other words, it should be understood that the terms used in this specification are used merely to describe preferred embodiments of the present invention and are not intended to specifically limit the content of the present invention, and that these terms are defined in consideration of various possibilities of the present invention.

[0033] In addition, it should be noted that in this specification, singular expressions may include plural expressions unless the context clearly indicates a different meaning, and that even if they are expressed in a similarly plural form, they may include the meaning of the singular.

[0034] Throughout this specification, where it is stated that a component "includes" another component, unless specifically stated otherwise, this may mean that it does not exclude any other component but may include any other component.

[0035] Furthermore, it should be noted that in cases where it is stated that a component "exists inside or is installed in connection with" another component, this component may be installed in direct connection or contact with the other component, or it may be installed at a certain distance apart, and in the case where it is installed at a certain distance apart, there may be a third component or means for fixing or connecting the component to the other component, and a description of this third component or means may be omitted.

[0036] On the other hand, if it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there is no third component or means.

[0037] Likewise, other expressions describing the relationship between each component, such as “between” and “right between”, or “adjacent to” and “directly adjacent to”, should be interpreted as having the same intent.

[0038] In addition, it should be understood that in this specification, terms such as “one side,” “other side,” “one side,” “other side,” “first,” “second,” etc., are used to clearly distinguish one component from another component, and that the meaning of the component is not restricted by such terms.

[0039] In addition, position-related terms such as "up," "down," "left," and "right" used in this specification should be understood as indicating the relative position of the corresponding component in the drawing, and unless an absolute position is specified, these position-related terms should not be understood as referring to an absolute position.

[0040] Furthermore, in specifying the reference numerals for each component of each drawing in this specification, the same component has the same reference numeral even if it is shown in different drawings; that is, the same reference numeral throughout the specification indicates the same component.

[0041] In the drawings attached to this specification, the size, position, connection relationships, etc., of each component constituting the present invention may be described in a partially exaggerated, reduced, or omitted manner for the convenience of explanation or to sufficiently clearly convey the concept of the present invention, and therefore, the proportions or scale may not be strictly accurate.

[0042] In addition, in the following description of the present invention, detailed descriptions of components that are deemed to unnecessarily obscure the essence of the present invention, such as known technologies including prior art, may be omitted.

[0043] Hereinafter, embodiments of the present invention will be described in detail with reference to the relevant drawings.

[0044] FIG. 1 is an exemplary diagram of a shunt resistor according to a first embodiment of the present invention.

[0045] Referring to FIG. 1, a plan view of a shunt resistor (100) according to a first embodiment of the present invention is shown. The shunt resistor (100) is a metal plate having a predetermined thickness, length, and width. The shunt resistor (100) may be configured to include a first conductive plate (111), a second conductive plate (112), a resistor (130), a first voltage detection terminal (151), and a second voltage detection terminal (152).

[0046] A resistor (130) can be placed between the first conductive plate (111) and the second conductive plate (112). That is, the first conductive plate (111) can be joined to the resistor (130) in the longitudinal direction, and the resistor (130) can be joined to the second conductive plate (112) in the longitudinal direction. Current can flow into the first conductive plate (111), pass through the resistor (130) to the second conductive plate (112), or conversely, flow into the second conductive plate (112), pass through the resistor (130) to the first conductive plate (111).

[0047] The first conductive plate (111) and the second conductive plate (112) can be formed of copper or a copper alloy.

[0048] Two fastening holes (120) may be formed in each of the first conductive plate (111) and the second conductive plate (112). That is, a first-1 fastening hole (121-1) and a first-2 fastening hole (121-2) may be formed in the first conductive plate (111), and a second-1 fastening hole (122-1) and a second-2 fastening hole (122-2) may be formed in the second conductive plate (112). The first conductive plate (111) is connected to the terminals of the first battery through the first-1 fastening hole and the first-2 fastening hole (121-2), and the second conductive plate (112) is connected to the terminals of the second battery through the second-1 fastening hole (122-1) and the second-2 fastening hole (122-2), so that the first battery (not shown) and the second battery (not shown) can be electrically connected.

[0049] The first-1 fastening hole (121-1) and the first-2 fastening hole (121-2) may be formed on one pole, for example, the positive pole, and the second-1 fastening hole (122-1) and the second-2 fastening hole (122-2) may be formed on the other pole, for example, the negative pole. The first-1 fastening hole (121-1) and the first-2 fastening hole (121-2) may be formed symmetrically with respect to the second-1 fastening hole (122-1) and the second-2 fastening hole (122-2) with the resistor (130) in between.

[0050] The first-1 fastening hole (121-1) and the first-2 fastening hole (121-2) are arranged at a certain distance apart in the width direction. Accordingly, the width of the first conductive plate (111) and the second conductive plate (112) can be twice the width of the conductive plate having one fastening hole. As the width of the conductive plate (110) increases, the two fastening holes arranged in the width direction on the conductive plate (110) can increase the safety of the fastening.

[0051] The fastening holes (120) of each conductive plate may be positioned at a predetermined distance from the resistor (130). For example, the first-1 fastening hole (121-1) and the first-2 fastening hole (121-2) may be positioned closer to one end of the longitudinal edge of the first conductive plate (111) than to the resistor (130).

[0052] A longitudinal cut and a width cut may be formed in the first conductive plate (111) and the second conductive plate (112). For example, a longitudinal cut (141a) and a width cut (141b) may be formed in the first conductive plate (111). And a longitudinal cut (142a) and a width cut (142b) may be formed in the second conductive plate (112). The cuts will be described using the first conductive plate (111) as a representative example. The description of the cuts in the first conductive plate (111) can be applied to the second conductive plate (112) as well.

[0053] The incision (140) includes a first incision (141) formed in the first conductive plate (111) and a second incision (142) formed in the second conductive plate (112). The first incision (141) and the second incision (142) may be formed in the same shape.

[0054] The first incision (141) includes a first incision (141a) in the longitudinal direction and a first incision (141b) in the width direction. Likewise, the second incision (142) includes a second incision (142a) in the longitudinal direction and a second incision (142b) in the width direction.

[0055] The first longitudinal cut (141a) and the second longitudinal cut (142a) are involved in maintaining the flatness of the first conductive plate (111) and the second conductive plate (112). The shunt resistor (100) can be bolted to the battery through the fastening hole (120). In the absence of the first longitudinal cut (141a), the flatness of the first conductive plate (111) may change due to the difference between the pressure exerted by the bolt fastened to the first-1 fastening hole (121-1) on the first conductive plate (111) and the pressure exerted by the bolt fastened to the first-2 fastening hole (121-2) on the first conductive plate (111) during the bolt fastening process. However, the first longitudinal cut (141a) separates the first-1 fastening hole (121-1) and the first-2 fastening hole (121-2), thereby preventing the first conductive plate (111) from twisting or changing its flatness even if there is a difference in the pressure exerted by the bolts pressing each fastening hole. In the same way, the second longitudinal cut (142a) prevents the second conductive plate (112) from twisting or changing its flatness. In addition, the first conductive plate (111) and the second conductive plate (112) are separated by the longitudinal cuts (141a, 142a), thereby offsetting the contact resistance value generated when bolts are fastened to each fastening hole, so that the resistance value error can be minimized. This will be described later in FIG. 4.

[0056] The first longitudinal cut (141a) and the first widthwise cut (141b) formed in the first cut (141) may intersect each other. Here, the meaning of intersecting is that neither the first longitudinal cut (141a) nor the first widthwise cut (141b) penetrates the other, but rather a T-shaped intersection is formed at the point where three line segments are formed.

[0057] A resistor (130) may be placed between the first conductive plate (111) and the second conductive plate (112). The resistor (130) may be formed from a resistive material or a combination of materials including a resistive material. For example, the resistor (130) may be formed from an alloy of copper-nickel-manganese, copper-manganese-tin, copper-nickel, nickel-chromium-aluminum, or nickel-chromium.

[0058] The resistor (130) is a rectangular metal plate having a predetermined thickness, length, and width. The thickness of the resistor (130) may be formed to be equal to or thinner than the thickness of the conductive plates (111, 112). The length of the resistor (130) may be formed to be shorter than the length of the conductive plates (111, 112). The width of the resistor (130) may be formed to be equal to the width of the conductive plates (111, 112).

[0059] Manganin of a copper alloy can be used as a material for the resistor (130). The general composition of the manganin is 84% ​​copper, 12% manganese, and 4% nickel. In the present invention, the composition ratio of the manganin constituting the resistor (130) is not limited to the above ratio, and the ratio of copper and nickel can vary.

[0060] One of the characteristics of manganin is its resistance to temperature changes. Due to this property, manganin is used in applications requiring accurate and stable electrical measurements, such as resistors and gauges. Additionally, manganin has high electrical conductivity, making it suitable for use in electrical and electronic equipment.

[0061] The voltage detection terminal (150) may include a first voltage detection terminal (151) formed on the first conductive plate (111) and a second voltage detection terminal (152) formed on the second conductive plate (112). The voltage detection terminal (150) corresponds to a node that detects the voltage formed between the first conductive plate (111) and the second conductive plate (112). The first voltage detection terminal (151) and the second voltage detection terminal (152) may be arranged symmetrically with respect to each other with the resistor (130) in between. Additionally, the first voltage detection terminal (151) and the second voltage detection terminal (152) may be arranged near the center in the width direction of the first conductive plate (111) and the second conductive plate (112) and be arranged close to the resistor (130).

[0062] The voltage detection terminal (150) may be made of copper or a copper alloy. The voltage detection terminal (150) may be joined to the conductive plate (110) using laser welding.

[0063] The location of the incisions (141b, 142b) in the width direction is closely related to the location of the voltage detection terminal (150). The first voltage detection terminal (151) is formed on the first conductive plate (111), and the second voltage detection terminal (152) is formed on the second conductive plate (112), with the resistor (130) in between; it is preferable that the first voltage detection terminal (151) and the second voltage detection terminal (152) be formed close to the resistor (130). Additionally, it is preferable that the incision (110) is not located between the first voltage detection terminal (151) and the second voltage detection terminal (152).

[0064] Conversely, it is preferable that the widthwise cut portions (141b, 142b) be located in the longitudinal direction close to the first voltage detection terminal (151) or the second voltage detection terminal (152), except between the first voltage detection terminal (151) and the second voltage detection terminal (152). The widthwise length of the widthwise cut portions (141b, 142b) is suitable to cover or be longer than the widthwise length of the voltage detection terminal (151), and it is preferable that it not exceed 1 / 3 of the widthwise length of the conduction plate (110) in consideration of the durability of the conduction plate (110).

[0065] It is preferable that the longitudinal cut portions (141a, 142a) intersect the widthwise cut portions (141b, 142b) and, in the widthwise direction, coincide with (first embodiment) or are close to (second embodiment, third embodiment).

[0066] FIG. 2 is an exemplary diagram of a shunt resistor according to a second embodiment of the present invention.

[0067] Referring to FIGS. 1 and 2, the first conductive plate (111) and the second conductive plate (112) are divided into two parts by the longitudinal cuts (141a, 142a) for each fastening hole. Therefore, the contact resistance value generated when bolting into the fastening hole is offset through the longitudinal cuts (141a, 142a), so the resistance value error can be minimized and the flatness of the first conductive plate (111) and the second conductive plate (112) can also be maintained.

[0068] FIG. 3 is an exemplary diagram of a shunt resistor according to a third embodiment of the present invention.

[0069] Referring to FIG. 3, the voltage detection terminal (150) may be positioned on one edge in the width direction, close to the resistor (130), as one edge in the length direction of the shunt resistor (100). The width direction cut portions (141b, 142b) may be positioned parallel to the voltage detection terminal (150) at a certain distance from the voltage detection terminal (150) on the outside of the voltage detection terminal (150) with respect to the resistor (130). The length direction cut portions (141a, 142a) intersect with the width direction cut portions (141b, 142b), but do not overlap with the voltage detection terminal (150) in the length direction, and are shorter than the length of the width direction cut portions (141b, 142b). The cut portions (140) are shaped like the letter L overall.

[0070] Referring to FIGS. 1 to 3, the voltage detection terminal (150) may be positioned to have a characteristic positional relationship with the cut portion (140). For example, the edge of the voltage detection terminal (150) may be positioned close to at least one of the longitudinal cut portions 141a, 142a) and the widthwise cut portions 141b, 142b). And the center of the voltage detection terminal (150) may be positioned close to the intersection of the longitudinal cut portions 141a, 142a) and the widthwise cut portions 141b, 142b).

[0071] Referring again to FIG. 1, the arrangement relationship of the first voltage detection terminal (151), the second voltage detection terminal (152), and the cut portion (140) is as follows. First, the cut portion (140) is not arranged between the first voltage detection terminal (151) and the second voltage detection terminal (152), and the cut portion (140) is located on the outside of the first voltage detection terminal (151) and the second voltage detection terminal (152), that is, on the left side of the first voltage detection terminal (151) and on the right side of the second voltage detection terminal (152) (based on FIG. 1). Among the cut portions (140), the width-direction cut portions (141b, 142b) are arranged adjacently on the outside of the first voltage detection terminal (151) and the second voltage detection terminal (152). And the longitudinal cuts (141a, 142a) intersect the widthwise cuts (141b, 142b) in a T-shape. The first longitudinal cut (141a) is positioned between the first-1 fastening hole (121-1) and the first-2 fastening hole (121-2), and the second longitudinal cut (142a) is positioned between the second-1 fastening hole (122-1) and the second-2 fastening hole (122-2). The longitudinal cuts (141a, 142a) prevent twisting that may occur when bolts fastened to the fastening hole (120) are fastened with different pressures, thereby increasing flatness and increasing the bonding area to reduce contact resistance.

[0072] Referring again to FIG. 2, the first voltage detection terminal (151) and the second voltage detection terminal (152) are also arranged such that a width-direction cut (141b, 142b) is placed adjacently on the outer side of the first voltage detection terminal (151) and the second voltage detection terminal (152), similar to the embodiment of FIG. 1. The second embodiment is a structure in which one side of the width-direction cut (141b, 142b) is removed and only the other side is left based on the length-direction cut (141a, 142a) of the first embodiment, and the first voltage detection terminal (151) and the second voltage detection terminal (152) are also moved and arranged in the direction of the remaining side.

[0073] Referring again to FIG. 3, a width-direction cut (141b, 142b) is disposed on the outer side of the first voltage detection terminal (151) and the second voltage detection terminal (152), and a length-direction cut (141a, 142a) is formed at the end of the width-direction cut (141b, 142b) in the direction of the first voltage detection terminal (151) and the second voltage detection terminal (152). In the case of the third embodiment, the width of the shunt resistor (100) may be smaller than the width of the first embodiment or the second embodiment. In the third embodiment, where the width is relatively small, a first-1 fastening hole (121-1) and a second-1 fastening hole (122-1) are formed, and the first-2 fastening hole (122-1) and the second-2 fastening hole (122-2) may be omitted. Therefore, the longitudinal cut (141a, 142a) located between the fastening holes is relatively short.

[0074] FIG. 4 is a chart of the resistance change rate of a shunt resistor according to embodiments of the present invention.

[0075] Referring to FIG. 4, the rate of change in resistance value before and after fastening the shunt resistor with a bolt is depicted. The rate of change in resistance value is depicted separately for the conductive plate before processing and the conductive plate after processing. It can be seen that the absolute value of the rate of change in resistance value before and after fastening the bolt is smaller than before processing the conductive plate, that is, after the cutting portion (140) is formed.

[0076] FIG. 5 is a flowchart of a method for manufacturing a shunt resistor according to one embodiment of the present invention.

[0077] Referring to FIG. 5, a method for manufacturing a shunt resistor (S100) according to one embodiment of the present invention may be configured to include the steps of: joining a first plate material that is the material of a first conductive plate, a second plate material that is the material of a second conductive plate, and a third plate material that is the material of a resistor (S110); forming fastening holes in the first conductive plate and the second conductive plate and cutting the joined plates into individual pieces (S120); connecting voltage detection terminals to the first conductive plate and the second conductive plate and forming one of the cut portions in the length direction and the width direction (S130); and adjusting the resistance temperature coefficient by forming the remaining cut portion among the cut portions in the width direction and the length direction (S140).

[0078] In step S110, the first and second plates are plate-shaped materials made of copper or copper plating, rolled up on a roll, and supplied as they are unwound from the roll. The third plate is a material for a resistor, for example, a plate-shaped manganin material, and can be supplied as it is unwound while rolled up in a hole. The boundaries between the first and third plates and between the third and second plates, which are in close contact with the third plate in between, are joined using an electron beam.

[0079] In step S120, while moving the joined assembly of the first plate, the third plate, and the second plate, a mold, for example, an upper mold and a lower mold, presses the assembly from the top and bottom to form fastening holes, and the joined plate can be cut to form individual shunt resistors.

[0080] In step S130, a voltage detection terminal can be connected to the first conductive plate (111) and the second conductive plate (112) using an electron beam. The material of the voltage detection terminal may be a copper-plated or silver-plated metal. After the voltage detection terminal is connected, either a longitudinal cut (141a, 142a) or a widthwise cut (141b, 142b) may be formed in the first conductive plate (111) and the second conductive plate (112). The shape of the cut may be formed as a rectangular shape in the form of a strip. First, when the longitudinal cut (141a, 142a) is formed, the remaining widthwise cut (141b, 142b) may then be formed to adjust the target TCR value in step S140. In this case, the TCR value is adjusted according to the position and length of the remaining widthwise cut portions (141b, 142b), and the embodiments of the present invention are structures obtained through a large number of tests to obtain the optimal TCR value.

[0081] As such, according to one embodiment of the present invention, the TCR of the shunt resistor can also be easily adjusted.

[0082] In addition, the shunt resistor can be made to have a relatively small TCR.

[0083] In addition, the flatness of the shunt resistor can be maintained.

[0084] Although various preferred embodiments of the present invention have been described above with some examples, the descriptions of various embodiments described in the "Specific details for carrying out the invention" section are merely illustrative, and those skilled in the art to which the present invention pertains will understand that the present invention can be modified in various ways or equivalent embodiments can be carried out based on the above description.

[0085] In addition, since the present invention can be implemented in various other forms, the present invention is not limited by the description above. The above description is provided merely to make the disclosure of the present invention complete and to fully inform those skilled in the art of the scope of the present invention, and it should be understood that the present invention is defined only by each claim of the claims.

[0086] The present invention can be used in the field of manufacturing shunt resistors.

Claims

1. As a shunt resistor, resistor; A first conductive plate and a second conductive plate respectively connected to both ends of the resistor in the longitudinal direction; and It includes a first voltage detection terminal and a second voltage detection terminal respectively connected on the first conductive plate and the second conductive plate, and The first conductive plate includes two first fastening holes (first-1 fastening holes, first-2 fastening holes) and two first cut sections (a first cut section in the longitudinal direction and a first cut section in the width direction), and The above-mentioned second conductive plate is configured to include two second fastening holes (second-1 fastening hole, second-2 fastening hole) and two second cut sections (a second cut section in the longitudinal direction and a second cut section in the width direction). Shunt resistor.

2. In Claim 1, The first incision in the longitudinal direction and the first incision in the width direction are connected to each other, A shunt resistor configured such that the second incision in the longitudinal direction and the second incision in the width direction are connected to each other.

3. In Claim 2, The first voltage detection terminal is positioned close to the intersection point where the first incision in the longitudinal direction and the first incision in the width direction are connected to each other, and A shunt resistor wherein the second voltage detection terminal is configured to be positioned close to the intersection point where the second cut portion in the longitudinal direction and the second cut portion in the width direction are connected to each other.

4. In Claim 1, The first cut portion in the width direction is positioned between the first voltage detection terminal and the first fastening hole, and A shunt resistor, wherein the second cut portion in the width direction is configured to be positioned between the second voltage detection terminal and the second fastening hole.

5. In Claim 1, The first incision in the longitudinal direction intersects the edge in the width direction of the first conductive plate, or the first incision in the width direction intersects the edge in the longitudinal direction of the first conductive plate, and A shunt resistor configured such that the second longitudinal cut portion intersects the edge in the width direction of the second conductive plate, or the second longitudinal cut portion intersects the edge in the length direction of the second conductive plate.

6. In Claim 1, The first longitudinal cut portion is positioned between the two first fastening holes, and A shunt resistor, wherein the second longitudinal cut portion is configured to be positioned between the two second fastening holes.

7. In claim 1, the shunt resistor is, Configured symmetrically with respect to the centerline in the width direction on the above resistor, Shunt resistor.

8. A method for manufacturing a shunt resistor, A step of joining a first plate material that serves as the material for the first conductive plate, a second plate material that serves as the material for the second conductive plate, and a third plate material that serves as the material for the resistor; A step of cutting the joined plate into individual pieces while forming fastening holes in the first conductive plate and the second conductive plate; A step of connecting voltage detection terminals to the first conductive plate and the second conductive plate, and forming one of the longitudinal and widthwise cut portions; and A method configured to include a step of controlling the resistance temperature coefficient by forming the remaining cut portion among the above-mentioned width and length cut portions, Method for manufacturing a shunt resistor.

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