A high temperature superconducting tape edge-to-edge connection assembly and method of manufacture

Abstract

The application discloses a high-temperature superconducting tape edge-to-edge connecting assembly and a preparation method thereof. The high-temperature superconducting tape edge-to-edge connecting assembly comprises a first superconducting tape, a second superconducting tape and a tape connecting assembly. The tape connecting assembly comprises a tape connecting piece, the upper end surface of the tape connecting piece is provided with a tape connecting bridge in the length direction, and the first superconducting tape and the second superconducting tape are arranged on the two sides of the tape connecting bridge. A first tape inner solder layer is arranged between the first superconducting tape and the tape connecting bridge, and a second tape inner solder layer is arranged between the second superconducting tape and the tape connecting bridge. The tape connecting assembly further comprises a connecting pressing plate, and the first superconducting tape and the second superconducting tape are arranged between the tape connecting piece and the connecting pressing plate. In the application, the edge-to-edge connection is adopted between different superconducting tapes, the current flows transversely along the superconducting layer in the adjacent superconducting tapes in the same plane, the resistance of the superconducting tape connecting end is reduced, and the risk of losing superconducting of the superconducting tape connecting end is reduced.

Description

Technical Field

[0001] This invention belongs to the field of controlled nuclear fusion high-temperature superconducting technology, and mainly relates to a high-temperature superconducting tape edge-to-edge connection component and its preparation method. Background Technology

[0002] Controlled nuclear fusion is a controlled, sustainable nuclear fusion reaction. A device built on Earth that performs a controlled nuclear reaction, similar to the sun, is called an "artificial sun." The goal of controlled nuclear fusion is to achieve safe, continuous, and stable energy output, and its potential advantages make it one of the most ideal ultimate energy forms. Compared to nuclear fission, controlled nuclear fusion releases more energy, has abundant raw material sources, produces less radioactive waste, and is safer.

[0003] Superconducting coils are one of the core components of controlled nuclear fusion. Superconducting coils are made by winding superconducting tapes. During the winding process of superconducting tapes, different superconducting tapes are connected by superconducting connectors.

[0004] Figures 1-3 This is a common method for joining superconducting tapes. Figure 1 It is a connection method in which two superconducting tapes are stacked one on top of the other, and the current is transmitted in the vertical direction at the connection point of the two superconducting tapes (vertical arrow direction in the figure). Figure 2 This is a connection method where multiple superconducting tapes are stacked one on top of the other. The current in the topmost superconducting tape flows vertically to the next layer, and the current in the next layer flows vertically to the layer after that. The current in the bottommost superconducting tape flows vertically to the top of another multi-layer superconducting tape. The current in the two superconducting tapes at both ends is transmitted vertically through the two directly contacting superconducting tapes (vertical arrow direction in the figure), which causes the current in the two directly contacting superconducting tapes to increase sharply, increasing the risk of quenching failure. Figure 3 It is a superconducting tape bridging method, in which the current of one superconducting tape first flows vertically to the connecting bridge, the current flows laterally along the connecting bridge to the top of another superconducting tape, and the current flows vertically to the other superconducting tape. Figure 3 and Figure 1-2 Although the connection methods are slightly different, they are all surface-to-surface connections. This is because each superconducting tape is composed of multiple different materials. The superconducting tape actually includes a multi-layer structure, and the superconducting layer is only one of them. During the transmission of current in the vertical direction (vertical arrow direction in the figure), it will pass through multiple tape layers of other materials. Although the resistance of the superconducting layer is zero, the tape layers of other materials have resistance, so there is a risk of heating and loss of superconductivity. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention discloses a high-temperature superconducting tape edge-to-edge connection assembly and its preparation method. In this high-temperature superconducting tape edge-to-edge connection assembly, current flows laterally along the superconducting layer in the superconducting tape.

[0006] The technical solution of this invention is: A high-temperature superconducting tape edge-to-edge connection assembly includes a first superconducting tape, a second superconducting tape, and a tape connection assembly; the tape connection assembly includes a tape connector, and the upper end face of the tape connector is provided with a tape connection bridge along the length direction, with the first superconducting tape and the second superconducting tape respectively disposed on both sides of the tape connection bridge.

[0007] Preferably, a first inner solder layer is provided between the first superconducting strip and the strip connecting bridge; and a second inner solder layer is provided between the second superconducting strip and the strip connecting bridge.

[0008] Preferably, the strip connection assembly further includes a connecting pressure plate, with the first superconducting strip and the second superconducting strip disposed between the strip connector and the connecting pressure plate.

[0009] Preferably, a first bottom solder layer is provided between the first superconducting strip and the strip connector, and a first top solder layer is provided between the first superconducting strip and the connecting pressure plate; a second bottom solder layer is provided between the second superconducting strip and the strip connector, and a second top solder layer is provided between the second superconducting strip and the connecting pressure plate.

[0010] Preferably, the strip connector has side baffles on both sides along the length direction, and the first superconducting strip and the second superconducting strip are respectively disposed between the strip connecting bridge and the side baffles; the upper end surface of the side baffle has a side baffle groove along the length direction, and the connecting pressure plate has a pressure plate mounting protrusion that matches the side baffle groove.

[0011] Preferably, the system further includes a first adjustment mechanism and a second adjustment mechanism; the first adjustment mechanism includes a first adjustment plate and a first adjustment screw, the first adjustment plate being disposed between the first superconducting strip and the connector side baffle, and the first adjustment screw being rotatably inserted into the connector side baffle on one side of the first superconducting strip; the second adjustment mechanism includes a second adjustment plate and a second adjustment screw, the second adjustment plate being disposed between the second superconducting strip and the connector side baffle, and the second adjustment screw being rotatably inserted into the connector side baffle on one side of the second superconducting strip.

[0012] A method for fabricating an edge-to-edge connection assembly based on high-temperature superconducting tape includes the following steps: Step S1: Strip cutting: The first superconducting strip is longitudinally cut from the end along one side edge to expose the first superconducting layer; the second superconducting strip is longitudinally cut from the end along one side edge to expose the second superconducting layer. Step S2: Tinning of the strip: Tinning of a section of the first superconducting strip that is exposed above the first superconducting layer, with a tinning thickness ≥ 20 micrometers; Tinning of a section of the second superconducting strip that is exposed above the second superconducting layer, with a tinning thickness ≥ 20 micrometers; Step S3: Connector Assembly: Lay the first superconducting tape and the second superconducting tape flat on the upper surface of the tape connector, respectively. The first superconducting tape and the second superconducting tape are respectively located on both sides of the tape connecting bridge. The first superconducting tape and the second superconducting tape are on the same plane, and the exposed first superconducting layer and the exposed second superconducting layer are respectively close to the tape connecting bridge; cover the connecting pressure plate on top of the first superconducting tape and the second superconducting tape to form a superconducting connector assembly; Step S4: Vacuuming: Place the superconducting connector assembly from step S3 into the heating furnace and evacuate the heating furnace; Step S5: Heating and heat preservation: After the heating furnace is evacuated, the heating furnace is started to heat the superconducting joint connection components, and the molten solder fills the gaps in the vacuum environment; Step S6: Curing and Shaping: Return the heating furnace to normal pressure, allow the heating furnace to cool naturally to room temperature, and allow the superconducting connector assembly to cool naturally to room temperature.

[0013] Preferably, in step S3: the inner solder layer of the first strip is disposed between the first superconducting strip and the strip connecting bridge, and the inner solder layer of the second strip is disposed between the second superconducting strip and the strip connecting bridge.

[0014] Preferably, in step S3: the bottom solder layer of the first strip is disposed between the first superconducting strip and the strip connector, and the top solder layer of the first strip is disposed between the first superconducting strip and the connecting pressure plate; the bottom solder layer of the second strip is disposed between the second superconducting strip and the strip connector, and the top solder layer of the second strip is disposed between the second superconducting strip and the connecting pressure plate.

[0015] Preferably, in step S4: the superconducting connector assembly from step S3 is placed into the heating furnace, and the heating furnace is evacuated, with the pressure in the heating furnace ≤10. -3 Pa; In step S5: After the heating furnace is evacuated, the heating furnace is started to heat the superconducting joint connection assembly. The heating temperature is 200-250℃ and the heating time is 10-30 minutes. After reaching the set temperature, the temperature is maintained for 20-30 minutes.

[0016] The beneficial effects of this invention are: This invention discloses a high-temperature superconducting tape edge-to-edge connection technology, which can solve the long-standing technical problem of directly connecting micron-scale ultrathin superconducting layers with each other.

[0017] This invention differs from existing technologies where high-temperature superconducting tapes are stacked or bridged (surface-to-surface connection), resulting in current flow along a vertical direction. In this invention, different superconducting tapes are connected edge-to-edge, with current flowing laterally along the superconducting layers of adjacent superconducting tapes on the same plane. Very little current flows through other layers of the superconducting tapes, leading to minimal resistance at the connection points and virtually no heat generation. This improves current transmission efficiency, reduces energy loss at the connection points, and lowers the risk of superconducting tape connection failure. Attached Figure Description

[0018] Figure 1 It is the first connection method of superconducting tapes in the existing technology (two superconducting tapes are stacked on top of each other). Figure 2 It is the second connection method for superconducting tapes in the existing technology (multiple superconducting tapes are stacked and connected). Figure 3 It is the third connection method of superconducting tape in the existing technology (superconducting tape bridging). Figure 4 This is a front view of a structural schematic diagram of Embodiment 2 of the present invention; Figure 5 yes Figure 4 AA section view in the middle; Figure 6 This is a schematic diagram of the connection structure in Embodiment 2 of the present invention; Figure 7 This is a schematic diagram of the current flow direction in Embodiment 2 of the present invention; Figure 8 This is a cross-sectional view of multiple high-temperature superconducting tape edge-to-edge connection components in Embodiment 2 of the present invention; Figure 9 This is a front view of a structural schematic diagram of Embodiment 3 of the present invention; Figure 10 yes Figure 9 BB section view in the middle; Figure 11 This is a schematic diagram of the connection structure in Embodiment 3 of the present invention; Figure 12 This is a cross-sectional view of multiple high-temperature superconducting tape edge-to-edge connection components in Embodiment 3 of the present invention; Figure 13 This is a front view of a structural schematic diagram of Embodiment 4 of the present invention; Figure 14 yes Figure 13 CC section view in the middle; Figure 15This is a cross-sectional view of multiple high-temperature superconducting tape edge-to-edge connection components in Embodiment 4 of the present invention; Figure 16 This is a front view of a structural schematic diagram of Embodiment 5 of the present invention; Figure 17 yes Figure 16 DD section view in the middle; Figure 18 This is a cross-sectional view of multiple high-temperature superconducting tape edge-to-edge connection components in Embodiment 5 of the present invention; Figure 19 This is a cross-sectional view (with adjustment mechanism) of the edge-to-edge connection assembly of the high-temperature superconducting tape in Embodiment 6 of the present invention. Figure 20 yes Figure 19 A schematic diagram of the connection structure; Figure 21 This is a cross-sectional view (with adjustment mechanism) of the edge-to-edge connection assembly of the high-temperature superconducting tape in Embodiment 7 of the present invention. In the figure: 1-First superconducting strip, 2-Second superconducting strip, 3-Strip connector, 4-Connecting pressure plate, 5-Inner solder layer of the first strip, 6-Inner solder layer of the second strip, 7-Bottom solder layer of the first strip, 8-Top solder layer of the first strip, 9-Bottom solder layer of the second strip, 10-Top solder layer of the second strip, 11-First adjusting plate, 12-First adjusting screw, 13-Second adjusting plate, 14-Second adjusting screw; 101-First superconducting layer, 201-Second superconducting layer, 301-Strip connecting bridge, 302-Side baffle of connector, 303-Side baffle slot, 401-Pressure plate mounting protrusion. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0020] Note that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] It should be noted that the terms "front," "rear," "upper," and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "equipped with," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Example 1: A high-temperature superconducting tape edge-to-edge connection assembly includes a first superconducting tape 1, a second superconducting tape 2, and a tape connection assembly. The tape connection assembly includes a tape connector 3 and a connecting pressure plate 4, with the first superconducting tape 1 and the second superconducting tape 2 disposed between the tape connector 3 and the connecting pressure plate 4. The first superconducting tape 1 includes a first superconducting layer 101, and the second superconducting tape 2 includes a second superconducting layer 201.

[0024] In this embodiment, the first superconducting tape 1 and the second superconducting tape 2 are respectively laid on the upper end face of the tape connector 3, and the first superconducting tape 1 and the second superconducting tape 2 are in the same plane. Current is transmitted from the side wall of the second superconducting tape 2 (second superconducting layer 201) to the side wall of the first superconducting tape 1 (first superconducting layer 101), and the first superconducting layer 101 and the second superconducting layer 201 can be soldered together.

[0025] The edge-to-edge connection assembly of the high-temperature superconducting tape of this invention differs from the connection structure of existing technologies. In this invention, the current flows laterally (directly between the first superconducting layer 101 and the second superconducting layer 201), compared to the vertical current flow in existing technologies. Because the flow path has no resistance, the resistance at the superconducting tape connection point is extremely low, resulting in virtually no heat generation. This improves current transmission efficiency and eliminates the risk of energy loss and overheating / superconductor failure at the connection point.

[0026] Example 2, see Figure 4-8 A high-temperature superconducting tape edge-to-edge connection assembly includes a first superconducting tape 1, a second superconducting tape 2, and a tape connection assembly. The tape connection assembly includes a tape connector 3 and a connecting pressure plate 4, with the first superconducting tape 1 and the second superconducting tape 2 disposed between the tape connector 3 and the connecting pressure plate 4. The first superconducting tape 1 includes a first superconducting layer 101, and the second superconducting tape 2 includes a second superconducting layer 201. The tape connector 3 and the connecting pressure plate 4 are generally made of copper.

[0027] In this embodiment, a strip connecting bridge 301 is provided along the length direction on the upper end face of the strip connector 3, and a first superconducting strip 1 and a second superconducting strip 2 are respectively provided on both sides of the strip connecting bridge 301. A first strip inner welding layer 5 is provided between the side wall of the first superconducting strip 1 and the side wall of the strip connecting bridge 301. A second strip inner welding layer 6 is provided between the side wall of the second superconducting strip 2 and the side wall of the strip connecting bridge 301.

[0028] The strip connector 3 in this embodiment includes a strip connecting bridge 301, which serves for positioning and connection. The first superconducting strip 1 and the second superconducting strip 2 are respectively disposed on both sides of the strip connecting bridge 301. Due to the strip connecting bridge 301, the first superconducting strip 1 and the second superconducting strip 2 will not be deflected when they are laid.

[0029] See Figure 7 , Figure 7 This is a diagram showing the current flow. The strip connector 3 (including the strip connecting bridge 301) of this invention is made of copper. The edge-to-edge connection assembly of the high-temperature superconducting strip in this invention differs from the connection structure of existing technologies. In this invention, the current flows laterally (the current flows between the first superconducting layer 101, the strip connecting bridge 301, and the second superconducting layer 201). Compared to the vertical flow of current in existing technologies (superconducting strips stacked or bridged), the current in this invention flows from the second superconducting layer 201 of the second superconducting strip 2 through the strip connecting bridge 301 and then into the first superconducting layer 101 of the first superconducting strip 1. The first superconducting layer 101 and the second superconducting layer 201 have no resistance. The strip connecting bridge 301 is made of pure copper and has a thin cross-section, with negligible resistance. The resistance at the superconducting strip connection is extremely low, resulting in minimal heat generation. This improves current transmission efficiency and reduces energy loss and the risk of overheating and superconductivity loss at the connection point.

[0030] See Figure 8 : Figure 8 It is a connection method of multiple first superconducting tapes 1 and multiple second superconducting tapes 2, and the current transmission method of multilayer superconducting tapes is similar to... Figure 7 The current transmission method is the same for all single-layer superconducting tapes. The current flows from the second superconducting layer 201 of each second superconducting tape 2 through the tape connecting bridge 301 and then into the first superconducting layer 101 of the corresponding first superconducting tape 1. The overall current loss is small, the resistance at the superconducting tape connection is extremely small, and there is basically no heat generation.

[0031] This invention discloses a high-temperature superconducting tape edge-to-edge connection technology, which can solve the long-standing technical problem of directly connecting micron-scale ultrathin superconducting layers with each other.

[0032] Experiments revealed that at an operating temperature of 77K (-196.15 ℃), the resistance at the joint of yttrium barium copper oxide (YBCO) high-temperature superconducting tape using the existing surface-to-surface connection method is approximately 50 nanoohms; while the resistance at the joint of the edge-to-edge connection assembly of the high-temperature superconducting tape in this embodiment is approximately 5 nanoohms. The connection method of this application is significantly superior to the existing connection method.

[0033] Example 3, see Figure 9-12 Example 3 is an improvement on Example 2. The similarities will not be repeated here. The differences are: a first bottom welding layer 7 is provided between the first superconducting tape 1 and the tape connector 3, and a first top welding layer 8 is provided between the first superconducting tape 1 and the connecting pressure plate 4. A second bottom welding layer 9 is provided between the second superconducting tape 2 and the tape connector 3, and a second top welding layer 10 is provided between the second superconducting tape 2 and the connecting pressure plate 4.

[0034] Example 3 adds a welding layer to Example 2, making the connection between the first superconducting tape 1 and the tape connector 3 and the connecting pressure plate 4, and the second superconducting tape 2 and the tape connector 3 and the connecting pressure plate 4 more secure and improving the tensile strength of the connection.

[0035] Example 4, see Figure 13-15 Example 4 is an improvement on Example 2. The similarities will not be repeated here. The difference is that: Side baffles 302 are provided on both sides of the strip connector 3 along its length. The first superconducting strip 1 and the second superconducting strip 2 are respectively disposed between the strip connecting bridge 301 and the side baffles 302. A side baffle groove 303 is provided on the upper surface of the side baffle 302 along its length, and the connecting pressure plate 4 has a pressure plate mounting protrusion 401 that matches the side baffle groove 303.

[0036] In Embodiment 4, a connector side baffle 302 is added, which mainly serves for positioning and protection. Due to the presence of the connector side baffle 302, the first superconducting strip 1 and the second superconducting strip 2 can be quickly and accurately clamped into the slots formed by the strip connecting bridge 301 and the connector side baffle 302. The first superconducting strip 1 and the second superconducting strip 2 will not be deflected, reducing the gaps between the first superconducting layer 101 and the strip connecting bridge 301, and between the second superconducting layer 201 and the strip connecting bridge 301, facilitating subsequent welding and current transmission, reducing resistance and energy loss at the connection, reducing heat generation at the connection, and reducing the risk of quenching.

[0037] Example 5, see Figure 16-18Example 5 is an improvement on Example 3. The similarities will not be repeated here. The difference is that: Side baffles 302 are provided on both sides of the strip connector 3 along its length. The first superconducting strip 1 and the second superconducting strip 2 are respectively disposed between the strip connecting bridge 301 and the side baffles 302. A side baffle groove 303 is provided on the upper surface of the side baffle 302 along its length, and the connecting pressure plate 4 has a pressure plate mounting protrusion 401 that matches the side baffle groove 303.

[0038] In Embodiment 5, a side baffle 302 for the connector is added, which mainly serves the functions of positioning and protection, and has the same effect as in Embodiment 4.

[0039] Example 6, see Figures 19-20 Example 6 is an improvement on Example 4. The similarities will not be repeated. The difference is that the high-temperature superconducting tape edge-to-edge connection assembly further includes a first adjustment mechanism and a second adjustment mechanism. The first adjustment mechanism includes a first adjustment plate 11 and a first adjustment screw 12. The first adjustment plate 11 is located between the first superconducting tape 1 and the connector side baffle 302. The first adjustment screw 12 is rotatably inserted into the connector side baffle 302 on one side of the first superconducting tape 1. The second adjustment mechanism includes a second adjustment plate 13 and a second adjustment screw 14. The second adjustment plate 13 is located between the second superconducting tape 2 and the connector side baffle 302. The second adjustment screw 14 is rotatably inserted into the connector side baffle 302 on one side of the second superconducting tape 2. Because there are gaps between the first superconducting tape 1, the second superconducting tape 2, and the tape connection bridge 301, adjustments are made using the first and second adjustment mechanisms to reduce these gaps.

[0040] See Figure 20 The first superconducting tape 1 is placed in the groove on the upper end face of the tape connector between the tape connecting bridge 301 and the connector side baffle 302. A first adjusting plate 11 is positioned between the first superconducting tape 1 and the connector side baffle 302. By rotating the first adjusting screw 12, the first adjusting screw 12 pushes against the first adjusting plate 11, and the first adjusting plate 11 pushes against the first superconducting tape 1 to move towards the tape connecting bridge 301, reducing the gap between the first superconducting tape 1 and the tape connecting bridge 301. The second superconducting tape 2 is placed in the groove on the upper end face of the tape connector between the tape connecting bridge 301 and the connector side baffle 302. A second adjusting plate 13 is positioned between the second superconducting tape 2 and the connector side baffle 302. By rotating the second adjusting screw 14, the second adjusting screw 14 pushes against the second adjusting plate 13, and the second adjusting plate 13 pushes against the second superconducting tape 2 to move towards the tape connecting bridge 301, reducing the gap between the second superconducting tape 2 and the tape connecting bridge 301.

[0041] Example 7, see Figure 21Example 7 is an improvement upon Example 5. The similarities are not repeated here, but the difference is that the high-temperature superconducting tape edge-to-edge connection assembly further includes a first adjustment mechanism and a second adjustment mechanism. The first adjustment mechanism includes a first adjustment plate 11 and a first adjustment screw 12. The first adjustment plate 11 is located between the first superconducting tape 1 and the connector side baffle 302, and the first adjustment screw 12 is rotatably inserted into the connector side baffle 302 on one side of the first superconducting tape 1. The second adjustment mechanism includes a second adjustment plate 13 and a second adjustment screw 14. The second adjustment plate 13 is located between the second superconducting tape 2 and the connector side baffle 302, and the second adjustment screw 14 is rotatably inserted into the connector side baffle 302 on one side of the second superconducting tape 2. Since there are gaps between the first superconducting tape 1, the second superconducting tape 2, and the tape connecting bridge 301, adjustments are made using the first and second adjustment mechanisms to reduce these gaps.

[0042] A method for fabricating an edge-to-edge connection assembly based on high-temperature superconducting tape includes the following steps: Step S1: Strip cutting: The first superconducting strip 1 is longitudinally cut from the end along one side edge to expose the first superconducting layer 101; the second superconducting strip 2 is longitudinally cut from the end along one side edge to expose the second superconducting layer 201. Step S2: Tinning of the strip: Tinning of a section of the first superconducting strip 1 that exposes the first superconducting layer 101, with a tinning thickness ≥ 20 micrometers; Tinning of a section of the second superconducting strip 2 that exposes the second superconducting layer 201, with a tinning thickness ≥ 20 micrometers; Step S3: Connector Assembly: Lay the first superconducting tape 1 and the second superconducting tape 2 flat on the upper surface of the tape connector 3, respectively. The first superconducting tape 1 and the second superconducting tape 2 are respectively located on both sides of the tape connecting bridge 301. The first superconducting tape 1 and the second superconducting tape 2 are on the same plane. The exposed first superconducting layer 101 and the exposed second superconducting layer 201 are respectively close to the tape connecting bridge 301. Cover the connecting pressure plate 4 on top of the first superconducting tape 1 and the second superconducting tape 2 to form a superconducting connector assembly. Step S4: Vacuuming: Place the superconducting connector assembly from step S3 into the heating furnace and evacuate the heating furnace; Step S5: Heating and heat preservation: After vacuuming, start the heating furnace to heat the superconducting connector assembly, and the molten solder fills the gaps in the vacuum environment; Step S6: Curing and Shaping: Return the heating furnace to normal pressure, allow the heating furnace to cool naturally to room temperature, and allow the superconducting connector assembly to cool naturally to room temperature.

[0043] In a preferred embodiment, in step S3: a first inner strip solder layer 5 is disposed between the first superconducting strip 1 and the strip connecting bridge 301, and a second inner strip solder layer 6 is disposed between the second superconducting strip 2 and the strip connecting bridge 301. By adding the first inner strip solder layer 5 and the second inner strip solder layer 6, a completely seamless weld between the first superconducting strip 1 and the strip connecting bridge 301, and between the second superconducting strip 2 and the strip connecting bridge 301, can be ensured during vacuum welding. Both the first inner strip solder layer 5 and the second inner strip solder layer 6 can be made of solder.

[0044] In a preferred embodiment, in step S3: a first strip bottom solder layer 7 is disposed between the first superconducting strip 1 and the strip connector 3; a first strip top solder layer 8 is disposed between the first superconducting strip 1 and the connecting plate 4; a second strip bottom solder layer 9 is disposed between the second superconducting strip 2 and the strip connector 3; and a second strip top solder layer 10 is disposed between the second superconducting strip 2 and the connecting plate 4. By adding the first strip bottom solder layer 7, the first strip top solder layer 8, the second strip bottom solder layer 9, and the second strip top solder layer 10, seamless welding between the first superconducting strip 1, the second superconducting strip 2, and the strip connector 3 is ensured during vacuum welding. Similarly, the first strip bottom solder layer 7, the first strip top solder layer 8, the second strip bottom solder layer 9, and the second strip top solder layer 10 can all be soldered.

[0045] In a preferred embodiment, in step S4: the superconducting connector assembly from step S3 is placed in the heating furnace, and the heating furnace is evacuated, with the pressure inside the heating furnace ≤ 10. -3 Pa; In step S5: After the heating furnace is evacuated, the heating furnace is started to heat the superconducting joint connection assembly. The heating temperature is 200-250℃, the heating time is 10-30 minutes, and the temperature is maintained for 20-30 minutes after reaching the set temperature. In this embodiment, the heating temperature is 200℃, the heating time is 20 minutes, and the temperature is maintained for 30 minutes after reaching the set temperature.

[0046] Since both the first superconducting tape 1 and the second superconducting tape 2 are composed of multiple layers of tapes made of different materials stacked on top of each other, the first superconducting layer 101 and the second superconducting layer 201 are the thinnest layers. In order to ensure the welding effect of the superconducting connector assembly, vacuum welding is required. Solder can freely fill the gaps in a vacuum high-temperature environment to achieve the best welding effect.

[0047] Through vacuum welding, the side of the first superconducting tape 1 exposed from the first superconducting layer 101 is seamlessly welded to the tape connecting bridge 301 via solder. Similarly, the side of the second superconducting tape 2 exposed from the second superconducting layer 201 is also seamlessly welded to the tape connecting bridge 301 via solder. Current in the second superconducting layer 201 flows into the first superconducting layer 101 through the tape connecting bridge 301. Compared to existing technologies (where superconducting tapes are stacked or bridged), where current flows vertically, in this invention, current flows from the second superconducting layer 201 of the second superconducting tape 2 through the tape connecting bridge 301 back into the first superconducting layer 101 of the first superconducting tape 1. Since there is no resistance between the first and second superconducting layers 101 and 201, and the tape connecting bridge 301 is made of pure copper with a thin cross-section and negligible resistance, the resistance at the superconducting tape connection point is extremely low, resulting in minimal heat generation. This improves current transmission efficiency and reduces energy loss and the risk of overheating and superconductor failure at the connection point.

[0048] Experiments revealed that at an operating temperature of 77K (-196.15 ℃), the resistance at the joint of yttrium barium copper oxide (YBCO) high-temperature superconducting tape using the existing surface-to-surface connection method is approximately 50 nanoohms; while the resistance at the joint of the edge-to-edge connection assembly of the high-temperature superconducting tape in this embodiment is approximately 5 nanoohms. The connection method of this application is significantly superior to the existing connection method.

[0049] The embodiments described above are merely preferred embodiments of the invention. Without departing from the spirit of the invention, all modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A high-temperature superconducting tape edge-to-edge connection assembly, characterized in that: It includes a first superconducting tape, a second superconducting tape, and a tape connecting assembly; the tape connecting assembly includes a tape connector, and the upper end face of the tape connector is provided with a tape connecting bridge along the length direction, with the first superconducting tape and the second superconducting tape respectively disposed on both sides of the tape connecting bridge.

2. The high-temperature superconducting tape edge-to-edge connection assembly according to claim 1, characterized in that: A first inner solder layer is provided between the first superconducting tape and the tape connecting bridge; a second inner solder layer is provided between the second superconducting tape and the tape connecting bridge.

3. The high-temperature superconducting tape edge-to-edge connection assembly according to claim 2, characterized in that: The strip connection assembly further includes a connecting pressure plate, with the first superconducting strip and the second superconducting strip disposed between the strip connector and the connecting pressure plate.

4. The high-temperature superconducting tape edge-to-edge connection assembly according to claim 3, characterized in that: A first bottom solder layer is provided between the first superconducting strip and the strip connector, and a first top solder layer is provided between the first superconducting strip and the connecting pressure plate; a second bottom solder layer is provided between the second superconducting strip and the strip connector, and a second top solder layer is provided between the second superconducting strip and the connecting pressure plate.

5. The high-temperature superconducting tape edge-to-edge connection assembly according to any one of claims 3 or 4, characterized in that: The strip connector has side baffles on both sides along its length. The first superconducting strip and the second superconducting strip are respectively located between the strip connecting bridge and the side baffles. The upper end face of the side baffle has a side baffle slot along its length. The connecting pressure plate has a pressure plate mounting protrusion that matches the side baffle slot.

6. The high-temperature superconducting tape edge-to-edge connection assembly according to claim 5, characterized in that: It also includes a first adjustment mechanism and a second adjustment mechanism; the first adjustment mechanism includes a first adjustment plate and a first adjustment screw, the first adjustment plate is disposed between the first superconducting tape and the connector side baffle, and the first adjustment screw is rotatably inserted into the connector side baffle on one side of the first superconducting tape; the second adjustment mechanism includes a second adjustment plate and a second adjustment screw, the second adjustment plate is disposed between the second superconducting tape and the connector side baffle, and the second adjustment screw is rotatably inserted into the connector side baffle on one side of the second superconducting tape.

7. A method for preparing an edge-to-edge connection assembly of a high-temperature superconducting tape according to any one of claims 3-6, characterized in that: Includes the following steps: Step S1: Strip cutting: The first superconducting strip is longitudinally cut from the end along one side edge to expose the first superconducting layer; The second superconducting tape is longitudinally cut from one side of the end to expose the second superconducting layer. Step S2: Tinning of the strip: Tinning of a section of the first superconducting strip that is exposed above the first superconducting layer, with a tinning thickness ≥ 20 micrometers; Tinning of a section of the second superconducting strip that is exposed above the second superconducting layer, with a tinning thickness ≥ 20 micrometers; Step S3: Connector Assembly: Lay the first superconducting tape and the second superconducting tape flat on the upper surface of the tape connector, respectively. The first superconducting tape and the second superconducting tape are respectively located on both sides of the tape connecting bridge. The first superconducting tape and the second superconducting tape are on the same plane, and the exposed first superconducting layer and the exposed second superconducting layer are respectively close to the tape connecting bridge; cover the connecting pressure plate on top of the first superconducting tape and the second superconducting tape to form a superconducting connector assembly; Step S4: Vacuuming: Place the superconducting connector assembly from step S3 into the heating furnace and evacuate the heating furnace; Step S5: Heating and heat preservation: After the heating furnace is evacuated, the heating furnace is started to heat the superconducting joint connection components, and the molten solder fills the gaps in the vacuum environment; Step S6: Curing and Shaping: Return the heating furnace to normal pressure, allow the heating furnace to cool naturally to room temperature, and allow the superconducting connector assembly to cool naturally to room temperature.

8. The method for preparing the edge-to-edge connection assembly of the high-temperature superconducting tape according to claim 7, characterized in that: In step S3: the inner solder layer of the first strip is placed between the first superconducting strip and the strip connecting bridge, and the inner solder layer of the second strip is placed between the second superconducting strip and the strip connecting bridge.

9. The method for preparing the edge-to-edge connection assembly of the high-temperature superconducting tape according to claim 8, characterized in that: In step S3: the bottom solder layer of the first strip is placed between the first superconducting strip and the strip connector, and the top solder layer of the first strip is placed between the first superconducting strip and the connecting pressure plate; the bottom solder layer of the second strip is placed between the second superconducting strip and the strip connector, and the top solder layer of the second strip is placed between the second superconducting strip and the connecting pressure plate.

10. The method for preparing the edge-to-edge connection assembly of the high-temperature superconducting tape according to claim 9, characterized in that: In step S4: the superconducting connector assembly from step S3 is placed into the heating furnace, and the heating furnace is evacuated, with the pressure inside the heating furnace ≤ 10. -3 Pa; In step S5: After the heating furnace is evacuated, the heating furnace is started to heat the superconducting joint connection assembly at a temperature of 200-250℃ for 10-30 minutes. After reaching the set temperature, the temperature is maintained for 20-30 minutes.

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