A high temperature superconducting stacked tape crimping fixture and clamping method

Abstract

The application relates to a strip clamp, in particular to a high-temperature superconducting stacked strip pressing clamp and clamping method, which is used for clamping of high-temperature superconducting stacked strips and comprises an insulating sliding rail, a clamp module, a conductive base and a conductive sheet. A sliding groove is arranged on one side surface of the conductive base. One end of the conductive sheet is inserted into the sliding groove and is in sliding cooperation with the sliding groove, and the other end of the conductive sheet is in contact with one high-temperature superconducting strip in the high-temperature superconducting stacked strip and forms a contact section. The insulating sliding rail is installed on the conductive base, and the insulating sliding rail is arranged beside the sliding groove. The clamp module is slidably arranged in the insulating sliding rail, and the clamp module is clamped to the contact section of the conductive sheet and the high-temperature superconducting strip. Compared with the prior art, the application solves the problem that the current natural distribution is difficult to realize due to poor contact when the existing high-temperature superconducting stacked strip is subjected to direct current test. The scheme realizes independent contact and fixation of each high-temperature superconducting strip in the high-temperature superconducting stacked strip, and improves the pressing contact.

Description

Technical Field

[0001] This invention relates to a strip clamp, specifically to a crimping clamp and clamping method for high-temperature superconducting stacked strips. Background Technology

[0002] High-temperature superconducting materials, possessing both zero resistance and perfect diamagnetism, have demonstrated enormous application potential in key fields such as power, medicine, and transportation since their discovery. After entering the practical application stage, second-generation high-temperature superconducting (2G HTS) tapes have gradually become the core direction of superconducting conductor research and industrialization. REBCO high-temperature superconducting tape, as a type of second-generation high-temperature superconducting (HTS) conductor, has a core functional layer composed of rare-earth barium copper oxide (REBa2Cu3O4). 7-x Composed of rare-earth barium copper oxide (REBCO) coatings, REBCO conductors possess high current-carrying capacity and high magnetic field stability. Mass production and commercialization are now largely achieved, and they are being actively explored in engineering applications such as power equipment and high-field magnets. Among various high-temperature superconducting materials, REBCO conductors stand out due to their high critical current density (Jc), low AC loss, and excellent mechanical strength at liquid nitrogen temperatures (77 K), gradually becoming the dominant material for second-generation high-temperature superconducting technology. Leveraging these advantages, REBCO conductors have been widely used in cutting-edge fields such as power transmission, magnetic resonance imaging (MRI), high-field magnet manufacturing, and magnetic levitation transportation.

[0003] In conventional single-strip DC testing of second-generation high-temperature superconducting (REBCO) tapes, two copper plates are typically pressed together, current is drawn through the plates, and the voltage is measured using the four-lead method. This approach ensures a unique current distribution and stable measurement for a single tape. REBCO tape stacking is an effective structure for increasing current-carrying capacity. Unlike single tapes, stacked REBCO tapes are affected not only by their own field but also by the magnetic fields of adjacent stacked tapes. When multiple tapes are stacked in parallel and still share the upper and lower copper plates for current drawing, it is often difficult to guarantee a sufficient and stable contact interface for each tape. Factors such as differences in contact resistance between the tape and plate ends, interconnections between tapes, the "interlayer resistance barrier" formed by the transition resistance and the internal metal layers of the tape, and differences in inter-strip inductance during charging can disrupt the natural current density distribution in the stacked structure. This can lead to voltage fluctuations in each tape, an underestimation of the equivalent critical current, and even the risk of heating at localized overcurrent points, affecting the reliability of the test results. Furthermore, even small differences in end contact resistance caused by poor crimping contact can dominate the current distribution under low-speed current conditions, and it is difficult to distribute the current naturally even in a "parallel" structure. Improving the end design to reduce and homogenize the contact resistance is the key to achieving current distribution.

[0004] Existing solutions for stacked, cable-like REBCO tapes primarily mitigate uneven current shunting by improving end-capping structures. For example, twisted stacked tape conductors are directly welded to copper terminals. While this improves electrical contact, welding is a destructive process, easily causing thermal damage to the superconducting layer or baseband, and making samples unusable for repeated testing and comparative experiments. Furthermore, the different contact paths between each tape and terminal result in highly asymmetrical contact resistance, affecting natural current shunting. To address this, end-capping techniques such as "interlaced copper sheets" have been proposed, but these still represent permanent welded structures for the entire terminal, preventing independent, repeatable clamping and rapid assembly / disassembly of each tape. Some experiments have used end copper plates to clamp the stacked tapes and feed power from one side to study current shunting behavior under the most unfavorable conditions; the results clearly observed strong non-uniform current shunting and voltage differences in the end region, but no suitable clamping structure was proposed.

[0005] Chinese Patent Application No. 201910175209.4, Patent Title: "A High-Temperature Superconducting Magnet and Magnetic Field Measurement Device Based on REBCO", includes a magnet formed by stacking ReBCO tapes into a block-like structure and a fastening device; the fastening device is used to fasten the magnet; the ReBCO is a superconducting material with the chemical formula (Re)Ba2Cu3O7, where Re represents a rare earth element; the fastening device is also equipped with a positioning element that can be changed in position, which can easily and quickly adapt to superconducting magnets of various sizes and shapes. However, this solution is for fixing and measuring a block-like magnet formed by stacking REBCO, and does not involve isopathic current diversion.

[0006] Chinese Patent Application No. 202310637076.4, Patent Title: "Adjustable Fastening Structure for Multiplexing Measurement of Superconducting Stacked Structures", includes: a base, a stacked strip clamping structure rotatably mounted on the base, an adjustable tilting structure movably mounted on the base and connected at one end to the stacked strip clamping structure, and a strip support structure penetrating the strip clamping structure; the stacked strip clamping structure adjusts the tilt angle through the adjustable tilting structure, the strip support structure provides vertical support force to the superconducting strip, the stacked strip clamping structure provides clamping force to the upper and lower surfaces of the stacked strip, and the strip clamping structure is provided with measurement terminals that contact the superconducting stacked strip. However, this solution only adjusts the tilt angle of the strip through the adjustable tilting structure, avoiding solder loss on the strip and ensuring uniform force on the strip, but does not involve equal-path current diversion.

[0007] Chinese Patent Application No.: 202011135680.X, Patent Title: "High-Temperature Superconducting Tape Clamp and High-Temperature Superconducting Tape Cable Winding Clamp". This high-temperature superconducting tape clamp includes: a clamp base; a splicing assembly; and a rotating assembly, which is mounted on the clamp base and has a first position and a second position relative to the clamp base. However, this solution only designs a clamp for fixing high-temperature superconducting tape in a cable, focusing on the uniformity of the high-temperature superconducting tape distribution on the sidewall of the cable core, without addressing equal-path current drainage.

[0008] Therefore, it is necessary to develop a crimping fixture that can independently clamp each strip, independently contact and apply force, and achieve equal-path flow at the ends for DC testing of high-temperature superconducting stacked strips. Summary of the Invention

[0009] The purpose of this invention is to provide a crimping fixture and clamping method for high-temperature superconducting stacked tapes to solve at least one of the aforementioned problems, thereby addressing the issue in the prior art where poor contact makes it difficult to achieve natural current distribution (uniform current distribution) during DC testing of high-temperature superconducting stacked tapes. This solution achieves independent contact and fixation of each high-temperature superconducting tape in the high-temperature superconducting stacked tapes, improving the crimping contact.

[0010] The objective of this invention is achieved through the following technical solution: The first aspect of this invention discloses a crimping fixture for high-temperature superconducting stacked strips, used for clamping high-temperature superconducting stacked strips, comprising an insulating slide rail, a clamping module, a conductive substrate, and a conductive sheet; A groove is formed on one side surface of the conductive substrate; One end of the conductive sheet is inserted into the groove and slides in fit with the groove, while the other end of the conductive sheet contacts one of the high-temperature superconducting tapes in the high-temperature superconducting stacked tapes and forms a contact segment. The insulated slide rail is mounted on a conductive substrate and is located on the side of the slide groove; The clamp module is slidably disposed within the insulated slide rail, and the clamp module clamps the contact section between the conductive sheet and the high-temperature superconducting tape; The high-temperature superconducting stacked tape is clamped by making several conductive sheets in independent contact with each high-temperature superconducting tape in the stack, and by using several clamping modules to independently press the independently contacting conductive sheets and high-temperature superconducting tapes.

[0011] Preferably, the groove formed on the conductive substrate is a dovetail groove, and the conductive sheet inserted into one end of the groove has a wedge-shaped structure.

[0012] Preferably, the dovetail angle of the dovetail groove is controlled at 55~60° (standard angle).

[0013] Preferably, the conductive base and the conductive sheet are made of the same conductive material.

[0014] Preferably, the conductive base is a conductive copper block, and the conductive sheet is a conductive copper sheet.

[0015] Preferably, the central axis of the insulating slide rail is parallel to the central axis of the sliding groove formed on the conductive base, and the opening direction of the insulating slide rail is the same as the opening direction of the sliding groove formed on the conductive base.

[0016] Preferably, the clamp module includes a knob, a pressing block and a supporting element; The supporting element is slidably connected with the insulating slide rail; A groove body is formed at the bottom of the supporting element, for accommodating the contact section between the conductive sheet and the high-temperature superconducting strip; A cavity is formed in the middle of the supporting element, the cavity is communicated with the groove body, and the pressing block is arranged in the cavity; The top of the supporting element is in threaded connection with the knob, the bottom end of the knob is fixedly connected with the pressing block, and the knob moves perpendicularly to the plane where the contact section is located.

[0017] Preferably, the movement direction of the knob is parallel to the central axis of the insulating slide rail.

[0018] Preferably, the supporting element is of a C-shaped structure, a U-shaped structure or a "匚"-shaped structure, the upper plate of the supporting element is used for threaded connection with the knob, and the lower plate of the supporting element is used for supporting the contact section.

[0019] Preferably, the upper plate and the lower plate of the supporting element are each extended with a sliding section, and the sliding connection between the sliding sections and the insulating slide rail realizes the sliding arrangement of the clamp module in the insulating slide rail.

[0020] Preferably, the spacing between adjacent conductive sheets is slidably adjusted according to actual test requirements, and is usually controlled to be 20mm~30mm, so as to avoid local overheating caused by too small spacing or decrease in operation stability caused by too large spacing.

[0021] Preferably, the distance of the overlapping contact between the conductive sheet and the high-temperature superconducting strip needs to be >1cm, so as to prevent the phenomena of poor contact and uneven local stress between the conductive sheet and the high-temperature superconducting strip.

[0022] Preferably, the fitting clearance between the sliding groove and the conductive sheet is ≤0.1mm, so as to ensure smooth movement of the conductive sheet.

[0023] In a second aspect, the present invention discloses a clamping method for the crimping fixture of the high-temperature superconducting stacked strip according to any one of the above, comprising the following steps: S1: Install conductive sheets, not less than the number of high-temperature superconducting tapes in the high-temperature superconducting stacked tapes, into the grooves of the conductive substrate; S2: Install a clamping module, which is no less than the number of high-temperature superconducting strips in the high-temperature superconducting stacked strips, into an insulated slide rail; S3: The high-temperature superconducting tapes are stacked and contacted one by one with the conductive sheets, and then clamped and fixed one by one by the clamping module. S4: Connect the conductive substrate to the test circuit to perform stacking tests on high-temperature superconducting stacked tapes.

[0024] The working principle of this invention is as follows: The combined use of conductive substrate and conductive sheet, as well as the direct contact (overlapping) between conductive sheet and high-temperature superconducting tape, achieves a slidingly adjustable and reliable connection. The combined use of the insulated slide rail and the clamp module, as well as the clamp module clamping the contact part between the conductive sheet and the high-temperature superconducting tape, further achieves full press-fit contact; Both the conductive sheet and the clamping module are determined according to the quantity of high-temperature superconducting tape, so that the high-temperature superconducting tape can be connected to the conductive substrate one by one, achieving the effect of equal path current diversion.

[0025] Compared with the prior art, the present invention has the following beneficial effects: To enable the fixed detection of high-temperature superconducting stacked tapes formed by multiple stacked high-temperature superconducting tapes in practical applications, and to avoid current measurement errors caused by poor contact, the high-temperature superconducting tape crimping clamp proposed in this solution has high practical value.

[0026] This fixture module enables natural current distribution across multiple high-temperature superconducting strips: by inserting multiple independent conductive plates into the dovetail grooves of the conductive substrate, each plate corresponds to a high-temperature superconducting strip, achieving unified current diversion and equal-path current supply to each strip. This significantly reduces current shunting deviations caused by inconsistent end contacts, thus ensuring natural current distribution across each high-temperature superconducting strip. Furthermore, the fixed clamping of a single high-temperature superconducting strip avoids measurement errors caused by displacement during multi-strip stacking tests; the insulated slide rail design allows the fixture module to move up and down along the rail and be fixed at any position, and the sliding design of the conductive plates in the dovetail grooves allows for flexible adjustment of the high-temperature superconducting strip spacing as needed; the knob-type locking structure allows for quick operation without additional tools, facilitating rapid assembly, disassembly, and debugging by experimental personnel, significantly improving experimental efficiency.

[0027] Existing welded or integral pressure plate solutions are often one-time or semi-fixed structures with poor adjustability and reusability. The "conductive substrate (copper block) + independent conductive sheet (copper sheet) + insulated slide rail + clamp module" proposed in this invention is a modular combination structure. It can increase or decrease the number of clamp modules and conductive sheets according to the amount of strip, can be reused in multiple experiments, and the spacing can be adjusted according to experimental testing requirements, thereby reducing experimental costs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a crimping fixture for high-temperature superconducting stacked tapes; In the figure: 1-Insulated slide rail; 2-Clamping module; 3-High temperature superconducting tape; 4-Conductive substrate; 5-Conductive sheet. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0030] To facilitate understanding of the present invention, it will be described in detail below with reference to the accompanying drawings and specific embodiments. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be more thorough and complete.

[0031] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0034] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0035] To enable those skilled in the art to understand the features and effects of this invention, the terms and expressions used in the specification and claims are explained and defined in general below. Unless otherwise specified, all technical and scientific terms used herein have the ordinary meaning understood by those skilled in the art regarding this invention, and in the event of any conflict, the definitions in this specification shall prevail.

[0036] The theories or mechanisms described and disclosed herein, whether right or wrong, should not in any way limit the scope of the invention, that is, the contents of the invention can be implemented without being limited by any particular theory or mechanism.

[0037] The present invention uses the terms "a," "an," "a," or similar expressions to describe the components and technical features described herein. Such descriptions are merely for convenience and to provide a general meaning regarding the scope of the invention. Therefore, such descriptions should be understood to include one or at least one, and the singular includes the plural, unless clearly otherwise indicated.

[0038] In this article, "or a combination thereof" means "or any combination thereof", and "any one", "any kind", "any one" means "any one", "any kind", "any one".

[0039] In this document, the terms “comprising,” “including,” “having,” “containing,” or any other similar terms are open-ended transitional phrases, intended to encompass non-exclusive inclusions. For example, a composition or article containing plural elements is not limited to those listed herein, but may also include other elements not explicitly listed but typically inherent to the composition or article. Furthermore, unless explicitly stated otherwise, the term “or” refers to an inclusive “or,” not an exclusive “or.” For example, the condition “A or B” is satisfied in any of the following cases: A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); A and B are both true (or exist). Furthermore, in this article, the interpretation of the terms “contains,” “includes,” “has,” and “contains” should be regarded as having specifically revealed and simultaneously covering closed conjunctions such as “composed of,” “composed of,” and “remaining as,” as well as conjunctions such as “essentially composed of,” “mainly composed of,” “mainly composed of,” “basically containing,” “basically composed of,” “basically composed of,” and “essentially containing.”

[0040] Example 1 A crimping fixture for high-temperature superconducting stacked tapes, such as Figure 1 As shown, the clamping mechanism for high-temperature superconducting stacked strips includes an insulating slide rail 1, a clamping module 2, a conductive substrate 4, and a conductive sheet 5. A groove is formed on one side surface of the conductive substrate 4; One end of the conductive sheet 5 is inserted into the groove and slides in cooperation with the groove, and the other end of the conductive sheet 5 contacts a high-temperature superconducting strip 3 in the high-temperature superconducting stacked strip and forms a contact segment; The insulating slide rail 1 is mounted on the conductive substrate 4, and the insulating slide rail 1 is located on the side of the slide groove; The clamp module 2 is slidably disposed within the insulating slide rail 1, and the clamp module 2 clamps the contact section between the conductive sheet 5 and the high-temperature superconducting tape 3; The high-temperature superconducting stacked tape is clamped by making several conductive sheets 5 in independent contact with each high-temperature superconducting tape 3 in the high-temperature superconducting stacked tape, and by making several clamping modules 2 independently press the independently contacting conductive sheets 5 and high-temperature superconducting tape 3.

[0041] More specifically, in this embodiment: This scheme, based on the measurement of multiple stacked high-temperature superconducting tapes 3 forming a high-temperature superconducting stacked tape, ensures the fixation of each high-temperature superconducting tape 3 and improves the press-fit contact. It solves the measurement error problem encountered in multiple stacked superconducting tapes, which is difficult to achieve natural current distribution (uniform current distribution) due to poor press-fit contact, simplifies the operation process, and enhances experimental flexibility.

[0042] The crimping fixture specifically includes an insulating slide rail 1, a fixture module 2, a conductive substrate 4, and a conductive sheet 5. In this embodiment, the conductive substrate 4 is a conductive copper block, and the conductive sheet 5 is a copper sheet.

[0043] Dovetail grooves are formed inside vertically arranged conductive copper blocks to accommodate multiple copper strips (the number of copper strips is no less than the number of high-temperature superconducting tapes 3, and usually the two can be controlled to be the same). The dovetail grooves ensure tight, low-resistance contact between the copper strips (the insertion ends have a wedge-shaped structure) and the conductive copper blocks, and provide stable geometric positioning. The conductive copper blocks serve as the main current source, further connected to an external power supply or test circuit to achieve unified current supply to each high-temperature superconducting tape 3. Multiple copper strips are spaced apart along the axial direction of the dovetail grooves, with wedge-shaped sections embedded inside the mother copper block, and the protruding long strips of copper strips used to support individual tapes.

[0044] In the above, the spacing between adjacent copper sheets of the conductive sheet 5 is not particularly required and can be adjusted according to actual conditions, generally controlled at 20mm~30mm, to avoid local overheating caused by too small a spacing and decreased operational stability caused by too large a spacing. At the same time, the contact (overlapping) distance between the conductive sheet 5 and the high-temperature superconducting tape 3 should be greater than 1cm to prevent poor contact and uneven local stress between the two; and the fit clearance of the dovetail groove should be ≤0.1mm to ensure smooth movement of the conductive sheet 5; the dovetail angle is 55°~60° (standard angle).

[0045] A vertical insulating slide rail 1 is arranged on the same side wall surface of the copper block where the dovetail groove is opened, at the side of the dovetail groove. The insulating slide rail 1 is used for installing the clamp modules 2 (the number of the clamp modules 2 is not less than the number of the high-temperature superconducting strips 3, and usually the two can be controlled to have the same number). The axes of the dovetail groove and the insulating slide rail 1 are parallel to each other, and the opening directions of the two are the same. Each clamp module 2 is composed of a screw knob, a pressing block and a supporting element: the supporting element has a "C"-shaped structure, the upper plate thereof is in threaded connection with the screw knob, the lower plate thereof can carry and support the copper sheet and the high-temperature superconducting strip 3, and the supporting element can move up and down along the slide rail; the pressing block is fixedly connected to the bottom end of the screw knob, and can press down the pressing block by tightening the screw knob at the contact position between the corresponding copper sheet and the high-temperature superconducting strip 3, so as to realize the pressing and fixing of the copper sheet and the high-temperature superconducting strip 3 between the pressing block and the supporting element, so that the copper sheet and the high-temperature superconducting strip 3 are in full contact. The slidable and adjustable arrangement of the clamp module 2 on the insulating slide rail 1 ensures free adjustment of the position of the clamp module 2, and the knob-type tightening and loosening structure is simple to operate, and can be quickly disassembled and assembled without additional tools. In addition, the screw knob in the clamp module 2 can specifically adopt an expansion screw structure, which is matched with an expandable outward-expanding sleeve; thus, during the tightening process of the screw knob, the extrusion of the screw body on the sleeve will cause the sleeve to expand outward, and the outward-expanding part will further extrude the supporting element of the clamp module 2 toward the insulating slide rail 1, so that the supporting element and the insulating slide rail 1 can realize the locking and fixing of the clamp module 2 on the insulating slide rail 1 through the friction force generated and gradually increased by extrusion.

[0046] Compared with the prior art, the significant difference of the present solution lies in that: the combined structure of "copper block + dovetail groove + independent copper sheet + insulating slide rail 1, clamp module 2" is adopted, which can not only ensure the independent stress of each high-temperature superconducting strip 3 and the full contact with the conductive copper sheet, but also realize the rapid adjustment and repeated positioning of the spacing between the high-temperature superconducting strips 3 by adjusting the positions of the clamp module 2 on the insulating slide rail 1 and the copper sheet in the dovetail groove, thereby realizing the flexibility of experimental operations.

[0047] Description of method steps: (1) Insert the wedge-shaped insertion end of the copper sheet into the long dovetail groove of the copper block; (2) Put the clamp module 2 with the screw knob into the side insulating slide rail 1, make it correspond to the copper sheet one by one, and wait for clamping; (3) Place each high-temperature superconducting strip 3 to be tested on the copper sheet one by one, and press down the pressing block with the screw knob of the clamp module 2, so as to clamp and fix the copper sheet and the high-temperature superconducting strip 3; (4) Place the test part of the high-temperature superconducting strip 3 on the test bench for stacking test; (5) After the test, if it is necessary to replace the high temperature superconducting tape 3 or to retest, the screw knob can be loosened and the high temperature superconducting tape 3 to be replaced can be taken out to replace it and adjust its position and sequence.

[0048] Example 2 A high-temperature superconducting stacked strip crimping fixture is basically the same as that in Example 1, except that the support element adopts a C-shaped structure.

[0049] Example 3 A high-temperature superconducting stacked strip crimping fixture is basically the same as that in Example 1, except that the support element adopts a U-shaped structure.

[0050] Example 4 A crimping fixture for high-temperature superconducting stacked strips, used for clamping high-temperature superconducting stacked strips, includes an insulating slide rail 1, a clamping module 2, a conductive substrate 4, and a conductive sheet 5; A groove is formed on one side surface of the conductive substrate 4; One end of the conductive sheet 5 is inserted into the groove and slides in cooperation with the groove, and the other end of the conductive sheet 5 contacts a high-temperature superconducting strip 3 in the high-temperature superconducting stacked strip and forms a contact segment; The insulating slide rail 1 is mounted on the conductive substrate 4, and the insulating slide rail 1 is located on the side of the slide groove; The clamp module 2 is slidably disposed within the insulating slide rail 1, and the clamp module 2 clamps the contact section between the conductive sheet 5 and the high-temperature superconducting tape 3; The high-temperature superconducting stacked tape is clamped by making several conductive sheets 5 in independent contact with each high-temperature superconducting tape 3 in the high-temperature superconducting stacked tape, and by making several clamping modules 2 independently press the independently contacting conductive sheets 5 and high-temperature superconducting tape 3.

[0051] A clamping method for a crimping fixture for high-temperature superconducting stacked tapes as described above includes the following steps: S1: Install conductive sheets 5, which are no less than the number of high-temperature superconducting strips 3 in the high-temperature superconducting stacked strips, into the grooves of the conductive substrate 4; S2: Install a clamping module 2, which is no less than the number of high-temperature superconducting strips 3 in the high-temperature superconducting stacked strips, into the insulating slide rail 1; S3: The high-temperature superconducting tape 3 is stacked and contacted with the conductive sheet 5 one by one, and then clamped and fixed one by one by the clamping module 2. S4: Connect the conductive substrate 4 to the test circuit to perform a stacking test on the high-temperature superconducting stacked tape.

[0052] In some embodiments, the sliding groove formed on the conductive base 4 is a dovetail groove, and the end of the conductive sheet 5 inserted into the sliding groove has a wedge-shaped structure.

[0053] In some embodiments, the conductive base 4 and the conductive sheet 5 are made of the same conductive material.

[0054] In some embodiments, the conductive base 4 is a conductive copper block, and the conductive sheet 5 is a conductive copper sheet.

[0055] In some embodiments, the central axis of the insulating slide rail 1 is parallel to the central axis of the sliding groove formed on the conductive base 4, and the opening direction of the insulating slide rail 1 is the same as the opening direction of the sliding groove formed on the conductive base 4.

[0056] In some embodiments, the clamp module 2 includes a knob, a pressing block and a supporting element; The supporting element is slidably connected to the insulating slide rail 1; The bottom of the supporting element is provided with a groove body for accommodating the contact section between the conductive sheet 5 and the high-temperature superconducting strip 3; The middle part of the supporting element is provided with a cavity, the cavity is communicated with the groove body, and the pressing block is arranged in the cavity; The top of the supporting element is in threaded connection with the knob, the bottom end of the knob is fixedly connected with the pressing block, and the knob moves perpendicularly to the plane where the contact section is located.

[0057] Further, in some embodiments, the movement direction of the knob is parallel to the central axis of the insulating slide rail 1.

[0058] Further, in some embodiments, the supporting element is of a C-shaped structure, a U-shaped structure or a "匚"-shaped structure, the upper plate of the supporting element is used for threaded connection with the knob, and the lower plate of the supporting element is used for supporting the contact section.

[0059] Further, in some embodiments, the upper plate and the lower plate of the supporting element are each extended with a sliding section, and the sliding arrangement of the clamp module 2 in the insulating slide rail 1 is realized through the sliding connection between the sliding sections and the insulating slide rail 1.

[0060] In summary, this solution proposes a novel crimping fixture for the testing of stacked multiple high-temperature superconducting tapes 3. This fixture securely clamps each high-temperature superconducting tape 3, preventing measurement errors caused by displacement during testing. Each high-temperature superconducting tape 3 can achieve full crimping contact with an independent copper sheet, avoiding the defects of existing technologies that rely solely on the upper and lower copper sheets to crimp the entire stacked tape, leading to poor contact and unrepeatable testing, or the destructive defects caused by welding. This significantly improves the repeatability, convenience, and reliability of the testing device. The dovetail groove and insulated slide rail 1 facilitate the handling, adjustment, and replacement of individual high-temperature superconducting tapes 3, solving the problem of individual adjustment of defective tapes in practical applications and enhancing experimental flexibility.

[0061] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A crimping clamp for high-temperature superconducting stacked tapes, used for clamping high-temperature superconducting stacked tapes, characterized in that, comprising an insulating slide rail (1), a fixture module (2), a conductive base body (4) and a conductive sheet (5); A sliding groove is formed on one side surface of the conductive base body (4); one end of the conductive sheet (5) is inserted into the sliding groove and is in sliding fit with the sliding groove, and the other end of the conductive sheet (5) is in contact with one high-temperature superconducting strip (3) in the high-temperature superconducting stacked strip to form a contact section; the insulating slide rail (1) is mounted on the conductive base body (4), and the insulating slide rail (1) is arranged beside the sliding groove; the fixture module (2) is slidably arranged in the insulating slide rail (1), and the fixture module (2) clamps the contact section between the conductive sheet (5) and the high-temperature superconducting strip (3); The high-temperature superconducting stacked strip is clamped through independent contact of a plurality of conductive sheets (5) with each high-temperature superconducting strip (3) in the high-temperature superconducting stacked strip, and independent crimping of the independently contacted conductive sheets (5) and high-temperature superconducting strips (3) by a plurality of fixture modules (2).

2. The crimping fixture for high-temperature superconducting stacked tapes according to claim 1, characterized in that, The sliding groove formed on the conductive base body (4) is a dovetail groove, and the end of the conductive sheet (5) inserted into the sliding groove is of a wedge-shaped structure.

3. The crimping fixture for high-temperature superconducting stacked tapes according to claim 1, characterized in that, The conductive base body (4) and the conductive sheet (5) are made of the same conductive material.

4. The crimping fixture for high-temperature superconducting stacked tapes according to claim 1, characterized in that, The conductive base body (4) is a conductive copper block, and the conductive sheet (5) is a conductive copper sheet.

5. The crimping fixture for high-temperature superconducting stacked strips according to claim 1, characterized in that, The central axis of the insulating slide rail (1) is parallel to the central axis of the sliding groove formed on the conductive base body (4), and the opening direction of the insulating slide rail (1) is the same as the opening direction of the sliding groove formed on the conductive base body (4).

6. The crimping fixture for high-temperature superconducting stacked strips according to claim 1, characterized in that, The fixture module (2) includes a knob, a pressing block and a supporting element; The supporting element is slidably connected with the insulating slide rail (1); A groove body is formed at the bottom of the supporting element, for accommodating the contact section between the conductive sheet (5) and the high-temperature superconducting strip (3); A cavity is formed in the middle of the supporting element, the cavity is communicated with the groove body, and the pressing block is arranged in the cavity; The top of the supporting element is in threaded connection with the knob, the bottom end of the knob is fixedly connected with the pressing block, and the knob moves perpendicularly to the plane where the contact section is located.

7. A crimping fixture for high-temperature superconducting stacked strips according to claim 6, characterized in that, The movement direction of the knob is parallel to the central axis of the insulating slide rail (1).

8. A crimping fixture for high-temperature superconducting stacked strips according to claim 6, characterized in that, The supporting element is of a C-shaped structure, a U-shaped structure or a "C"-shaped structure, the upper plate of the supporting element is used for threaded connection with the knob, and the lower plate of the supporting element is used for supporting the contact section.

9. A crimping fixture for high-temperature superconducting stacked strips according to claim 8, characterized in that, The upper plate and the lower plate of the supporting element are respectively extended with sliding sections, and the sliding arrangement of the fixture module (2) in the insulating slide rail (1) is realized through the sliding connection of the sliding sections with the insulating slide rail (1).

10. A clamping method for a crimping fixture for high-temperature superconducting stacked strips as described in any one of claims 1 to 9, characterized in that, comprising the following steps: S1: Install no less than the number of conductive sheets (5) corresponding to the number of high-temperature superconducting strips (3) in the high-temperature superconducting stacked strip into the sliding grooves of the conductive base body (4); S2: Install no less than the number of fixture modules (2) corresponding to the number of high-temperature superconducting strips (3) in the high-temperature superconducting stacked strip into the insulating slide rail (1); S3: Stack and contact each high-temperature superconducting strip (3) with the conductive sheet (5) one by one, and clamp and fix them one by one through the fixture module (2); S4: Connect the conductive substrate (4) to the test circuit to perform a stacking test of the high-temperature superconducting stacked tape.

Images