Preparation method of fusing composite belt

Abstract

The invention provides a preparation method of a fusing composite belt, which comprises the following steps: providing a first metal base material, forming a first groove in a first side of the first metal base material and extending along a second direction, forming a second groove in a second side of the first metal base material and extending along the second direction, and providing a second metal base material and extending along the second direction, the melting point of the second metal base material is lower than the melting point of the first metal base material, the width of the second metal base material arranged in the first groove in the third direction is smaller than the width of the first groove in the third direction, and the second metal base material is connected in the first groove and the second groove; and second-time compounding is conducted, specifically, the first side and the second side are extruded at the same time, so that the second metal base material is in interference fit with the interior of the first groove and the interior of the second groove. According to the preparation method of the fusing composite belt, the processing efficiency of the metal composite belt can be improved while deformation and fracture of the metal composite belt are effectively prevented.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to a method for preparing a fusible composite tape. Background Art

[0002] A fuse, also known as a fuse, is an electrical appliance that uses the heat generated by itself to melt the fuse and disconnect the circuit when the current exceeds the specified value. It is a current protector made based on the principle that after the current exceeds the specified value for a period of time, the heat generated by itself melts the fuse and disconnects the circuit. Fuses are widely used in high and low voltage power distribution systems and control systems as well as electrical equipment. As a short circuit and overcurrent protector, it is one of the most commonly used protective devices. The working principle of a fuse is mainly based on the thermal effect. The fuse is equipped with metal wires (also called melting bodies) inside, which connect the circuit under normal circumstances. When current passes through the fuse, the metal wire is heated by resistance and the temperature gradually rises. If the current exceeds the rated current of the fuse, the temperature of the wire will rise to a level sufficient to melt it. When the wire melts, the circuit is cut off, thereby preventing excessive current from continuing to flow, thereby protecting the circuit and electrical equipment. In the prior art, the molten body can be made of metal composite tape. The existing composite tape manufacturing process will not only cause the composite tape to be easily deformed or even broken, but also have low processing efficiency. Therefore, a production process is needed that can effectively prevent the deformation and breakage of the metal composite tape while improving the processing efficiency of the metal composite tape. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a method for preparing a fused composite strip, which can effectively prevent the metal composite strip from being deformed and broken while improving the processing efficiency of the metal composite strip.

[0004] According to a first aspect of the present invention, a method for preparing a fusible composite tape comprises: providing a first metal substrate, wherein the first metal substrate has a first side and a second side opposite to each other along a first direction, wherein the first direction is a thickness direction of the first metal substrate; providing a first groove on the first side of the first metal substrate, wherein the first groove extends along a second direction and penetrates the first metal substrate along the second direction, wherein the second direction is a width direction of the first metal substrate, and a plurality of the first grooves are arranged at intervals along a third direction, wherein the third direction is a length direction of the first metal substrate; providing a second metal substrate, wherein the melting point of the second metal substrate is lower than the melting point of the first metal substrate, the width of the second metal substrate arranged in the first groove in the third direction is smaller than the width of the first groove in the third direction, and the width of the second metal substrate arranged in the second groove in the third direction is smaller than the width of the second groove in the third direction; performing a first composite, wherein the second metal substrate is connected in the first groove and the second groove; performing a second composite, wherein the first side and the second side are simultaneously extruded, so that the second metal substrate is interference-connected in the first groove and the second groove.

[0005] According to the method for preparing the fusion composite tape of the first embodiment of the present invention, there are at least the following beneficial effects: after the first groove and the second groove are opened on the first metal substrate and the second metal substrate is respectively arranged in the first groove and the second groove, the first side and the second side are pressed simultaneously, so that the pressure on the first side and the second side is consistent, thereby avoiding the deformation caused by the fracture of one side of the metal composite tape. At the same time, when the second metal substrate is arranged in the first groove and the second groove, the width of the second metal substrate in the third direction is smaller than the width of the first groove and the second groove in the third direction, thereby avoiding the first substrate from being squeezed in the first direction during the first composite, thereby avoiding the bending of the first metal substrate. And through the rolling during the second composite, the second metal substrate is deformed and filled in the first groove and the second groove. Through the two composites, not only will the composite tape not be deformed, but the second metal substrate can also be tightly connected to the first metal substrate.

[0006] According to some embodiments of the present invention, the thickness of the second metal substrate disposed in the first groove in the first direction is greater than the depth of the first groove in the first direction, and the thickness of the second metal substrate disposed in the second groove in the first direction is greater than the depth of the second groove in the first direction.

[0007] According to some embodiments of the present invention, the first groove corresponds to the second groove one by one, and the width of the overlapping area of ​​the projections of the first groove and the second groove in the first direction in the third direction is not less than 90% of the width of the first groove in the third direction.

[0008] According to some embodiments of the present invention, the thickness of the first metal substrate in the first direction is H, and the thickness of the first metal substrate in the overlapping area after the first groove and the second groove are formed is not less than 5%*H and not more than 90%*H.

[0009] According to some embodiments of the present invention, a spacing between adjacent first grooves in the third direction is not less than 2 mm and not more than 30 mm, and a width of the first groove in the third direction is not less than 2.5 mm and not more than 35 mm.

[0010] According to some embodiments of the present invention, after the first groove and the second groove are formed and before the second metal substrate is provided, the first metal substrate is cleaned, and the cleaning includes mechanical grinding and / or pickling.

[0011] According to some embodiments of the present invention, in the second lamination, when rolling the first side and the second side, the first metal substrate and the second metal substrate are heated to not less than 600° C. and not more than 700° C.

[0012] According to some embodiments of the present invention, a third compounding is performed after the second compounding is completed, and the third compounding is to heat the first metal substrate and the second metal substrate to a temperature not less than 580° C. and not more than 750° C. for a duration not less than 1.5 minutes.

[0013] According to some embodiments of the present invention, the material of the first metal substrate is copper or a copper alloy, and the material of the second metal substrate is silver or a silver alloy.

[0014] According to some embodiments of the present invention, the first metal substrate and the second metal substrate are cut along the third direction after the second combining.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 It is a schematic structural diagram of a first metal substrate in a method for preparing a fusible composite tape in some embodiments of the present invention; Figure 2 It is a schematic diagram of the structure of the metal composite tape after the first composite in the method for preparing the fusing composite tape in some embodiments of the present invention; Figure 3 It is a schematic diagram of the structure of the metal composite strip after the second composite in the method for preparing the fusing composite strip in some embodiments of the present invention; Figure 4 It is a schematic structural diagram of cutting in the method for preparing a fusible composite tape in some embodiments of the present invention.

[0017] Reference numerals: 1. First metal substrate; 2. Second metal substrate; 3. First groove; 4. Second groove; 5. First side; 6. Second side. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0021] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0022] Thermal cut-off metal composite tape is a special metal composite material that can quickly melt at a specific temperature, thereby playing a role in circuit protection. The following is a detailed introduction to thermal cut-off metal composite tape: Thermal cut-off metal composite tape is usually made of two or more different metals through a special process, and has the characteristic of automatically melting at a set temperature. This material combines the advantages of different metals, such as good electrical conductivity, thermal conductivity and mechanical strength, while having precise melting temperature control. The main components of thermal cut-off metal composite tape include base metal and melting metal. The base metal usually provides good mechanical support and electrical conductivity, while the melting metal has a low melting point and can quickly melt and disconnect the circuit at a specific temperature. Its structure can be layered, strip-shaped or other special shapes to adapt to different application scenarios. When the current in the circuit is too large or the temperature is too high, the melting metal part in the thermal cut-off metal composite tape will quickly heat up and reach its melting point. At this time, the melting metal will melt and disconnect the circuit, thereby preventing the current from continuing to flow and possibly causing fire or equipment damage. Thermally-fused metal composite tapes are widely used in various occasions that require circuit protection, such as electronic products, communication equipment, power supplies, automotive electronics, etc. They act as fuses in these devices, ensuring that the circuit can be quickly cut off in abnormal situations to protect the safety of equipment and personnel.

[0023] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4The method for preparing a fusion bonded tape according to the first embodiment of the present invention comprises: providing a first metal substrate 1, wherein the first metal substrate 1 has a first side 5 and a second side 6 opposite to each other along a first direction, wherein the first direction is the thickness direction of the first metal substrate 1; providing a first groove 3 on the first side 5 of the first metal substrate 1, wherein the first groove 3 extends along a second direction and penetrates the first metal substrate 1 along the second direction, wherein the second direction is the width direction of the first metal substrate 1, and a plurality of first grooves 3 are arranged at intervals along a third direction, wherein the third direction is the length direction of the first metal substrate 1; providing a second groove 4 on the second side 6 of the first metal substrate 1, wherein the second groove 4 extends along the second direction and penetrates the first metal substrate 1 along the second direction, and a plurality of first grooves 3 are arranged at intervals along the third direction; providing a second metal substrate 2, wherein the melting point of the second metal substrate 2 is lower than the melting point of the first metal substrate 1, the width of the second metal substrate 2 arranged in the first groove 3 in the third direction is smaller than the width of the first groove 3 in the third direction, and the width of the second metal substrate 2 arranged in the second groove 4 in the third direction is smaller than the width of the second groove 4 in the third direction; and performing a first composite, wherein the second metal substrate 2 is connected in the first groove 3 and the second groove 4. During the first compounding, the width of the second metal substrate 2 in the first groove 3 in the third direction is smaller than the width of the first groove 3 in the third direction, so that the second metal substrate 2 can be placed in the first groove 3 more conveniently, and will not cause pressure to the first metal substrate 1 when placed in the first groove 3, thereby avoiding the first metal substrate 1 from being squeezed and deformed when the second metal substrate 2 is placed in the first groove 3. The second metal substrate 2 can be fixed in the first groove 3 by clamping, bonding with glue, or fixing with tape. When glue is used for bonding, the glue can also be removed by heating in the subsequent processing. When the first metal substrate 1 is set in the second groove 4, it can be set by setting the second metal substrate 2 in the first groove 3.

[0024] In the second compounding, the first side 5 and the second side 6 are simultaneously extruded so that the second metal substrate 2 is interference-connected in the first groove 3 and the second groove 4. The second compounding is performed after the first compounding is completed. During the second compounding, the first side 5 and the second side 6 can be rolled or pressed simultaneously, and the second metal substrate 2 in the first groove 3 and the second groove 4 is deformed, so that the second metal substrate 2 is tightly connected in the first groove 3 and the second groove 4. When the second metal substrate 2 in the first groove 3 is extruded and deformed, it will generate extrusion force on the bottom of the first groove 3 and the two sides of the first groove 3. The second metal substrate 2 directly deforms the first metal substrate 1 when it extrudes the bottom of the first groove 3, and the pressure generated by the second metal substrate 2 on the side of the first groove 3 causes a large internal stress to appear on the first side 5 of the first metal substrate 1, so that the first metal substrate 1 forms an arc-shaped bend with the first side 5 convex outward. At the same time, the second metal substrate 2 in the second groove 4 is pressed, and when the second metal substrate 2 in the second groove 4 is deformed, the bottom of the second groove 4 is also squeezed, and the side of the second groove 4 is squeezed to form internal stress on the second side 6 of the first metal substrate 1. As a result, the pressures formed on the first side 5 and the second side 6 during the second composite can offset each other, thereby effectively avoiding deformation during the processing of the composite metal strip, and avoiding bending and fracture of one side of the first metal substrate 1. At the same time, when processing the composite metal strip, the extrusion of the metal composite strip takes the longest time. Pressing the second metal substrate 2 on both sides of the first metal substrate 1 at the same time saves a lot of processing time and improves processing efficiency.

[0025] When providing the first metal substrate 1 and the second metal substrate 2, a wound first metal substrate 1 and a wound second metal substrate 2 can be used, and the first metal substrate 1 and the second metal substrate 2 can be continuously provided by continuous unwinding.

[0026] According to some embodiments of the present invention, the thickness of the second metal substrate 2 disposed in the first groove 3 in the first direction is greater than the depth of the first groove 3 in the first direction, and the thickness of the second metal substrate 2 disposed in the second groove 4 in the first direction is greater than the depth of the second groove 4 in the first direction. Taking the first groove 3 as an example, when the thickness of the second metal substrate 2 disposed in the first groove 3 in the first direction is greater than the depth of the first groove 3 in the first direction, the second metal substrate 2 can be more conveniently fixed in the first groove 3. At the same time, during the second composite, after the second metal substrate 2 is extruded and deformed, the second metal substrate 2 can be more fully filled into the first groove 3, and it is also easier to extrude the second metal substrate 2. Further, before the second composite, on the cross section perpendicular to the second direction, the cross-sectional area of ​​the second metal substrate 2 disposed in the first groove 3 is equal to the cross-sectional area of ​​the first groove 3, so that after the second composite, the first side 5 of the first metal substrate 1 is more flat.

[0027] According to some embodiments of the present invention, the first groove 3 corresponds to the second groove 4 one by one, and the width of the overlapped area of ​​the projection of the first groove 3 and the second groove 4 in the first direction in the third direction is not less than 90% of the width of the first groove 3 in the third direction. The one-to-one correspondence between the first groove 3 and the second groove 4 can better offset the extrusion force generated during the second composite, so that the composite belt is less likely to deform. When the metal composite belt is used, the current passes through the metal composite belt along the third direction. When the current exceeds the specified range value, the temperature of the first metal substrate 1 and the second metal substrate 2 will rise, so that the second metal substrate 2 is melted first. After the second metal substrate 2 is melted, the resistance of the position where the first groove 3 and the second groove 4 are located on the first metal substrate 1 rises, so that the temperature rises rapidly, and the first metal substrate 1 melts at the same time, thereby forming the melting of the metal composite belt. Especially in the overlapped area of ​​the projection of the first groove 3 and the second groove 4 in the first direction, the resistance increases more, and the first metal substrate 1 melts faster. Therefore, the proportion occupied by the overlapped area is increased, so that the first metal substrate 1 melts faster, making the metal composite belt safer. Furthermore, the interval between adjacent first grooves 3 in the third direction is not less than 2 mm and not more than 30 mm, and the width of the first groove 3 in the third direction is not less than 2.5 mm and not more than 35 mm. Thereby improving the effectiveness of the metal composite belt. Furthermore, the thickness of the first metal substrate 1 in the first direction is H, and the thickness of the first metal substrate 1 in the overlapping area after the first groove 3 and the second groove 4 are opened is not less than 5%*H, and not more than 90%*H. Thereby, after the second metal substrate 2 is melted, the resistance of the position where the first groove 3 and the second groove 4 are located on the first metal substrate 1 increases faster, so that the first metal substrate 1 melts faster.

[0028] According to some embodiments of the present invention, after the first groove 3 and the second groove 4 are formed and before the second metal substrate 2 is provided, the first metal substrate 1 is cleaned, and the cleaning includes mechanical grinding and / or pickling. The cleaning step is used to remove impurities such as metal dust or debris on the surface of the metal composite belt to ensure the rolling composite between the first metal substrate 1 and the second metal substrate 2. At the same time, other dirt such as oil and grease on the surface of the material can also be removed, which is beneficial to ensure the production quality of the metal composite belt.

[0029] According to some embodiments of the present invention, in the second lamination, when rolling the first side 5 and the second side 6, the first metal substrate 1 and the second metal substrate 2 are heated to not less than 600° C. and not more than 700° C. By performing the second lamination at a high temperature, the first metal substrate 1 and the second metal substrate 2 can be better fused, so that the connection between the first metal substrate 1 and the second metal substrate 2 is more firmly established.

[0030] According to some embodiments of the present invention, a third composite is performed after the second composite is completed. The third composite is to heat the first metal substrate 1 and the second metal substrate 2 to a temperature not less than 580°C and not higher than 750°C, and the duration is not less than 1.5 minutes. After the second composite, a large internal stress will be generated in the composite metal strip. In order to eliminate the internal stress and make the composite metal strip less prone to damage, a third composite is performed to heat and preserve the composite metal strip to eliminate the internal stress of the composite metal strip. During the second and third composites, a protective gas can be used to prevent the first metal substrate 1 and the second metal substrate 2 from oxidation, and the protective gas can be an inert gas such as helium.

[0031] According to some embodiments of the present invention, the material of the first metal substrate 1 is copper or a copper alloy, and the material of the second metal substrate 2 is silver or a silver alloy.

[0032] Reference Figure 4 , wherein the dotted line is a cutting line, according to some embodiments of the present invention, the first metal substrate 1 and the second metal substrate 2 are cut along a third direction after the second composite. In any step after the second composite, the first metal substrate 1 and the second metal substrate 2 are cut in the third direction to form a plurality of metal composite strips, thereby further improving the processing efficiency of the metal composite strips.

[0033] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A method for preparing a fusion bonded tape, characterized in that: include: Providing a first metal substrate, wherein the first metal substrate has a first side and a second side opposite to each other along a first direction, wherein the first direction is a thickness direction of the first metal substrate; A first groove is provided on the first side of the first metal substrate, the first groove extends along a second direction and penetrates the first metal substrate along the second direction, the second direction is the width direction of the first metal substrate, and a plurality of the first grooves are arranged at intervals along a third direction, the third direction is the length direction of the first metal substrate; A second groove is formed on the second side of the first metal substrate, the second groove extends along a second direction and penetrates the first metal substrate along the second direction, and a plurality of the first grooves are arranged at intervals along a third direction; Providing a second metal substrate, wherein the melting point of the second metal substrate is lower than that of the first metal substrate, the width of the second metal substrate disposed in the first groove in the third direction is smaller than the width of the first groove in the third direction, and the width of the second metal substrate disposed in the second groove in the third direction is smaller than the width of the second groove in the third direction; The first composite step is to connect the second metal substrate in the first groove and the second groove; In the second compounding, the first side and the second side are extruded simultaneously, so that the second metal substrate is interference-connected in the first groove and the second groove.

2. The method for preparing the fusible composite tape according to claim 1, characterized in that: The thickness of the second metal substrate disposed in the first groove in the first direction is greater than the depth of the first groove in the first direction, and the thickness of the second metal substrate disposed in the second groove in the first direction is greater than the depth of the second groove in the first direction.

3. The method for preparing the fusible composite tape according to claim 1, characterized in that: The first groove corresponds to the second groove one by one, and the width of an overlapping area of ​​projections of the first groove and the second groove in the first direction in the third direction is not less than 90% of the width of the first groove in the third direction.

4. The method for preparing the fusible composite tape according to claim 3, characterized in that: The thickness of the first metal substrate in the first direction is H, and the thickness of the first metal substrate in the overlapping area after the first groove and the second groove are formed is not less than 5%*H and not more than 90%*H.

5. The method for preparing a fusible composite tape according to claim 1, characterized in that: The interval between adjacent first grooves in the third direction is not less than 2 mm and not more than 30 mm, and the width of the first groove in the third direction is not less than 2.5 mm and not more than 35 mm.

6. The method for preparing a fusible composite tape according to claim 1, characterized in that: After the first groove and the second groove are formed and before the second metal substrate is provided, the first metal substrate is cleaned, and the cleaning includes mechanical grinding and / or pickling.

7. The method for preparing a fusible composite tape according to claim 1, characterized in that: In the second lamination, the first metal substrate and the second metal substrate are heated to not less than 600° C. and not more than 700° C. when the first side and the second side are rolled.

8. The method for preparing a fusible composite tape according to claim 7, characterized in that: After the second compounding is completed, the third compounding is performed, wherein the first metal substrate and the second metal substrate are heated to a temperature not less than 580° C. and not more than 750° C. for a duration not less than 1.5 minutes.

9. The method for preparing a fusible composite tape according to claim 1, characterized in that: The material of the first metal substrate is copper or a copper alloy, and the material of the second metal substrate is silver or a silver alloy.

10. The method for preparing a fusible composite tape according to any one of claims 1 to 9, characterized in that: The first metal substrate and the second metal substrate are cut along the third direction after the second compounding.

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