Fuse bus manufacturing method

Abstract

A fuse bus manufacturing method includes: a first configuration step (S10) of configuring a second conductor (200) of a material different from a first conductor (100) on the upper and lower sides of the first conductor (100) wound in a roll shape; a first rolling step (S20) of unwinding and continuously supplying the first conductor (100) and the second conductor (200) to a rolling mill, and continuously pressure welding the second conductor (200) on the upper and lower sides of the first conductor (100) at a predetermined interval to a predetermined thickness, so that the thickness of the second conductor (200) is greater than that of the center; and a first forming step (S30) of placing a laminated plate material obtained by rolling the first conductor (100) and the second conductor (200) in a forming machine to be compression formed, thereby forming a bus shape in which the second conductor (200) is configured at both ends and the first conductor (100) is exposed between the second conductor (200). The bus is manufactured by pressure welding the first conductor and the second conductor of different materials, and has a fuse function while reducing weight and manufacturing cost.

Description

Technical Field

[0001] This invention relates to a method for manufacturing a fusible busbar, and more specifically, to a method for manufacturing a busbar by pressure welding a first conductor and a second conductor of different materials, thereby achieving a fusible function while reducing weight and cost. Background Technology

[0002] Electrical components that use electricity receive power from batteries or generators to perform their functions. If an overcurrent flows in the power supply circuit, the electrical components will be damaged and become unusable.

[0003] To prevent this problem, a fuse is used, which is placed between the power supply unit and the electrical component receiving the power. If an over-power supply occurs, the fuse melts and disconnects before the electrical component, thereby preventing overcurrent from being supplied to the electrical component.

[0004] In other words, a fuse is a component commonly used in electronics and electrical engineering to protect mechanical devices from overcurrent in a circuit.

[0005] Basically, a fuse is a thin metal wire that melts when an overcurrent flows to block the current flow. Depending on the fusing capacity, it can also be manufactured in the form of a flat and elongated plate-shaped busbar. Recently, with the accelerated commercialization of electric vehicles, the use of high-capacity batteries for electric vehicles has increased significantly, and the use of fusible busbars has increased dramatically in order to improve the electrical stability of electric vehicles.

[0006] On the other hand, the existing fusible busbars mainly used in electric vehicles typically use copper, which has excellent conductivity at a relatively low price, as the main material to improve power supply efficiency. In order to stably provide high-capacity power supply, the fusible busbar is formed into a rod shape with a predetermined thickness, and only the fusible part located in the center is formed to be thinner so as to disconnect and cut off the current when overcurrent is supplied.

[0007] Therefore, even if existing fuse busbars use copper, which has excellent conductivity at a relatively low price, the high price of copper results in high manufacturing costs. Furthermore, copper is heavy, which makes it difficult to achieve lightweighting in vehicles that require lightweighting, such as electric vehicles.

[0008] Existing technical documents

[0009] Patent Document 0001: Korean Patent Publication No. 102019069 Summary of the Invention

[0010] Technical issues

[0011] In order to overcome the existing disadvantages mentioned above, the present invention aims to provide a method for manufacturing a fusible busbar by pressure welding a first conductor and a second conductor of different materials to manufacture the busbar, thereby achieving a fusible function while reducing weight and manufacturing costs.

[0012] In addition, the present invention aims to provide a method for manufacturing a fuse busbar in which a first conductor exposed by cutting a pressure-welded laminated sheet becomes a fuse portion that performs a fusing function.

[0013] Technical solution

[0014] To achieve the objectives described above, one embodiment of the fusing busbar manufacturing method of the present invention includes:

[0015] In the first configuration step S10, a second conductor 200, which is wound into a roll and made of a different material than the first conductor 100, is respectively configured on the upper and lower parts of both sides of the first conductor 100 that is wound into a roll.

[0016] In the first rolling step S20, the first conductor 100 and the second conductor 200 are unfolded and continuously supplied to the rolling mill. The second conductor 200 is continuously press-welded to a preset thickness at a predetermined interval on the upper and lower surfaces of the first conductor 100, so that the sides are thicker than the center.

[0017] In the first forming step S30, the laminated sheet formed by rolling the first conductor 100 and the second conductor 200 is fed into a forming machine for compression forming, thereby forming a busbar shape with the second conductor 200 at both ends and the first conductor 100 exposed between the second conductor 200.

[0018] In one embodiment, the first conductor 100 is an aluminum plate.

[0019] In one embodiment, the second conductor 200 is a copper plate.

[0020] In one embodiment, the method for manufacturing a fusible busbar of the present invention further includes: a first cutting step S40, cutting the inner end of the second conductor 200 with a predetermined width along the length direction of the rolled laminate.

[0021] In one embodiment, the method for manufacturing a fusible busbar of the present invention further includes: a first winding step S50, winding the rolled laminated sheet.

[0022] Another embodiment of the method for manufacturing the fusible busbar of the present invention includes:

[0023] In the second configuration step S60, a second conductor 200, which is wound into a roll and uses a different material from the first conductor 100, is respectively configured on the upper and lower sides of the first conductor 100 that is wound into a roll.

[0024] In the second rolling step S70, the first conductor 100 and the second conductor 200 are unfolded and continuously supplied to the rolling mill to press-weld the second conductor 200 to the upper and lower surfaces of the first conductor 100.

[0025] In the second cutting step S80, the second conductor 200 located at the upper and lower parts is cut with a predetermined width so that a portion of the first conductor 100 of the rolled laminate is exposed.

[0026] In the second forming step S90, the laminated sheet that has been cut is fed into a forming machine for compression forming, thereby forming a busbar shape with second conductors 200 at both ends and the first conductor 100 exposed between the second conductors 200.

[0027] In one embodiment, the second cutting step S80 is to continuously cut the middle portion of the second conductor 200 in the rolled laminate in the length direction so that the center of the first conductor 100 is continuously exposed.

[0028] In one embodiment, the second cutting step S80 is to cut in a direction perpendicular to the length direction of the second conductor 200 of the rolled laminate, and to repeatedly form the cut portion at predetermined intervals.

[0029] In one embodiment, the method for manufacturing a fusible busbar of the present invention further includes a second winding step S110, which involves winding the cut laminated sheet.

[0030] In one embodiment, the method for manufacturing a fusible busbar of the present invention further includes a heating step S100, in which the first conductor 100 and the second conductor 200, which are respectively configured, are unfolded and then respectively placed into a heating furnace and heated to different temperatures.

[0031] In one embodiment, the heating step S100 includes:

[0032] In the first heating process S101, the first conductor 100 is placed inside a heating furnace and heated to 350-450°C.

[0033] In the second heating process S102, the second conductor 200 is placed inside the heating furnace and heated to 750-850°C.

[0034] The reduction process S103 removes the oxide layer generated on the surface of the second conductor 200 during the second heating process S102.

[0035] In one embodiment, the reduction process S103 involves reacting carbon with the copper oxide layer on the surface of the second conductor 200 to remove the copper oxide layer.

[0036] In one embodiment, the reduction process S103 involves irradiating the surface of the oxidized second conductor 200 with a laser to remove the copper oxide layer.

[0037] The effects of the invention

[0038] According to the present invention, a fusible busbar is manufactured by pressure welding copper and aluminum materials, which significantly reduces manufacturing costs compared to existing fusible busbars made only of copper, thereby improving economic efficiency and reducing weight. This has the effect of helping to reduce battery weight when used in batteries for electric vehicles, etc.

[0039] In addition, continuous manufacturing of fusible busbars by pressure welding copper and aluminum materials can improve productivity. Attached Figure Description

[0040] Figure 1 This is an example diagram showing a fusible busbar manufactured by a preferred embodiment of the fusible busbar manufacturing method of the present invention.

[0041] Figure 2 This is a flowchart of the first embodiment of the fusing busbar manufacturing method of the present invention.

[0042] Figure 3 This is an example diagram illustrating the first rolling step of a first embodiment of the fusible busbar manufacturing method of the present invention.

[0043] Figure 4 This is a flowchart of a second embodiment of the fusing busbar manufacturing method of the present invention.

[0044] Figure 5 This is an example diagram illustrating the first cutting step of a second embodiment of the fusible busbar manufacturing method of the present invention.

[0045] Figure 6 This is a flowchart of the third embodiment of the fusing busbar manufacturing method of the present invention.

[0046] Figure 7 This is an example diagram illustrating the second rolling step of a third embodiment of the fusible busbar manufacturing method of the present invention.

[0047] Figure 8 This is an example diagram illustrating the second cutting step of a third embodiment of the fusible busbar manufacturing method of the present invention.

[0048] Figure 9 This is a flowchart of the fourth embodiment of the fusing busbar manufacturing method of the present invention.

[0049] Explanation of reference numerals in the attached figures:

[0050] A: Fuse busbar

[0051] B: Fuse section

[0052] C: Through-hole section

[0053] 100: First conductor

[0054] 200: Second conductor

[0055] S10: First Configuration Step

[0056] S20: First rolling step

[0057] S30: First molding step

[0058] S40: First cutting step

[0059] S50: First winding step

[0060] S60: Second Configuration Step

[0061] S70: Second rolling step

[0062] S80: Second cutting step

[0063] S90: Second molding step

[0064] S100: Heating Step

[0065] S101: First heating process

[0066] S102: Second heating process

[0067] S103: Reduction Process

[0068] S110: Second winding step Detailed Implementation

[0069] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art to which this invention pertains may easily carry out the invention.

[0070] The descriptions of this invention are merely examples for structural or functional illustration, and the scope of this invention is not limited to the embodiments described in this specification.

[0071] That is, various changes can be made to the embodiments, and they can have various forms. Therefore, the scope of the present invention should be understood to include equivalents that can realize the technical concept.

[0072] Furthermore, the purpose or effect proposed in this invention does not mean that a particular embodiment includes all or only that purpose or effect, and therefore the scope of the invention should not be interpreted as limited to that purpose or effect.

[0073] All terms used in the relevant description of this invention, unless otherwise defined, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0074] Terms commonly used and defined in dictionaries should be interpreted as having the same meaning as in the relevant art, unless otherwise expressly defined in this invention, and should not be interpreted in an ideal or overly formal sense.

[0075] Furthermore, terms such as "first" and "second" are used only to distinguish different components and are not restricted by the order of manufacture; the scope of rights shall not be limited by these terms.

[0076] Figure 1 This is an example diagram illustrating a fusible busbar manufactured by a preferred embodiment of the fusible busbar manufacturing method of the present invention; Figure 2 This is an example diagram illustrating the first rolling step of a first embodiment of the fusible busbar manufacturing method of the present invention; Figure 3 This is an example diagram of a fusible busbar manufactured according to the first embodiment of the fusible busbar manufacturing method of the present invention.

[0077] Reference Figures 1 to 3 Please provide an explanation.

[0078] In one embodiment, the fusing busbar manufacturing method of the present invention includes a first configuration step S10, a first rolling step S20, and a first forming step S30, wherein a fusing busbar can be manufactured by pressure welding a first conductor 100 and a second conductor 200 of different materials.

[0079] The first configuration step S10 is to configure a second conductor 200, which is wound into a roll and is made of a different material than the first conductor 100, on the upper and lower parts of both sides of the first conductor 100 that is wound into a roll.

[0080] The first conductor 100 may be made of aluminum plate, and it is stated in advance that there are no restrictions on the thickness or width of the aluminum plate.

[0081] The second conductor 200 may be a copper plate, and there is no limitation on the thickness or width of the copper plate, but the thickness is the same as that of the first conductor 100, and the width is preferably no more than 1 / 2 of the width of the first conductor 100.

[0082] The first rolling step S20 is to unfold the first conductor 100 and the second conductor 200 and continuously supply them to the rolling mill, and continuously press-weld the second conductor 200 to a preset thickness at a predetermined interval on the upper and lower surfaces of the first conductor 100 so that the two sides are thicker than the center.

[0083] The rolling mill may include rolls R, adjusting guides, and guide control tools.

[0084] The width or length is adjusted according to the adjusting guide, and the roller R rolls the joint of different metals in the length direction or the width direction.

[0085] On the other hand, the rolls R are arranged with a predetermined gap between the upper and lower parts, and preferably a gap-holding protrusion R1 that holds the gap between the second conductors 200 is arranged in the middle of the rolls R.

[0086] The adjusting guides are respectively arranged on both sides of the roll R. The adjusting guides are moved according to the control tool. The adjusting guides move from both sides of the roll R to close between the rolls R to adjust the width or length of the laminated sheet to be welded.

[0087] The guide control tool controls the movement of the adjusting guide so that the adjusting guide moves from both sides of the roll R toward the center of the roll R according to the preset specifications of the laminate.

[0088] In one embodiment, the guide control tool may use a hydraulic or pneumatic cylinder.

[0089] The first forming step S30 is to place the laminated sheet of the rolled first conductor 100 and the second conductor 200 into a forming machine for compression forming, thereby forming a busbar shape with the second conductor 200 at both ends and the first conductor 100 exposed between the second conductor 200.

[0090] That is, the first forming step S30 may include the process required for forming the busbar shape, including: a cutting process, cutting the laminated sheet according to the shape of the busbar to be manufactured; a bending process, bending the busbar with a predetermined curvature; a trimming process, removing a part of the busbar; and a punching process, forming through holes at the terminal portion of the busbar.

[0091] The forming machine is preferably a stamping machine, but it is not limited to this. It should be noted in advance that the shape of the busbar is not limited.

[0092] The fusible busbar manufactured by the fusible busbar manufacturing method of the present invention as described above is manufactured in a form in which second conductors 200 are arranged at both ends in the length direction and a first conductor 100 is exposed between the second conductors 200, thereby having conductivity. At the same time, it is made of aluminum plate with a melting point lower than that of copper, so the first conductor 100 exposed at the center of the busbar performs the function of the fusible part.

[0093] That is, the first conductor 100 exposed at the center of the busbar uses an aluminum plate with a lower melting point than the second conductor 200 made of copper, and is thinner than the two ends of the second conductor 200. As a result, the surface area and cross-sectional area are smaller than the two ends of the busbar where the second conductor 200 is disposed. Therefore, in the event of an overcurrent flowing through the busbar, the first conductor 100 located in the middle performs the function of the fuse and is melted and disconnected, thereby stably performing the fuse function to prevent overcurrent from being supplied to electrical components.

[0094] In addition, aluminum, which has excellent conductivity and fusion function, is lighter and cheaper than copper, is used as the first conductor 100, and copper is used as the second conductor 200 only at both ends in the length direction to form the electrode connection part. This makes it easy to mass-produce, reduces the use of expensive and heavier copper, saves manufacturing costs, and also reduces weight. Therefore, it has the effect of helping to reduce weight when used in batteries for electric vehicles, etc.

[0095] Figure 4 This is a flowchart of a second embodiment of the fusing busbar manufacturing method of the present invention. Figure 5 This is an example diagram illustrating the first cutting step of a second embodiment of the fusible busbar manufacturing method of the present invention.

[0096] Reference Figures 4 to 5 The description will be provided, but detailed descriptions of structures that are repeated in the above embodiments or have the same reference numerals will be omitted.

[0097] In one embodiment, the method for manufacturing a fusible busbar of the present invention may further include a first cutting step S40 of cutting the rolled laminated sheet.

[0098] In the first cutting step S40, the inner end of the second conductor 200 is cut to a predetermined width along the length direction of the laminated sheet rolled in the first rolling step S20.

[0099] That is, in the first rolling step S20, a cutting tool T is placed between the second conductors 200 welded at a predetermined distance on the upper and lower sides of the first conductor 100, and the inner end of the second conductor 200 is cut along the length direction of the laminate with a predetermined width, thereby forming a welded portion with a predetermined width and depth in the center of the laminate.

[0100] In one embodiment, the method for manufacturing a fusible busbar of the present invention may further include a first winding step S50 of winding a rolled laminated sheet.

[0101] Therefore, the rolled laminate is not only easy to transport, handle and store, but also allows for more efficient busbar forming by adjusting the supply speed of the rolled laminate.

[0102] Figure 6 This is a flowchart of the third embodiment of the fusible busbar manufacturing method of the present invention; Figure 7 This is an example diagram illustrating the second rolling step of a third embodiment of the fusible busbar manufacturing method of the present invention; Figure 8 This is an example diagram illustrating the second cutting step of a third embodiment of the fusible busbar manufacturing method of the present invention.

[0103] Reference Figures 6 to 8 The description will be provided, but detailed descriptions of structures that are repeated in the above embodiments or have the same reference numerals will be omitted.

[0104] In one embodiment, the fusing busbar manufacturing method of the present invention includes a second configuration step S60, a second rolling step S70, a second cutting step S80, and a second forming step S90. The fusing busbar can be manufactured by pressure welding a first conductor 100 and a second conductor 200 made of different materials.

[0105] The second configuration step S60 is to configure a second conductor 200, which is wound into a roll and uses a different material than the first conductor 100, on the upper and lower sides of the first conductor 100 that is wound into a roll.

[0106] The first conductor 100 may be made of aluminum plate, and there is no limitation on the thickness or width of the aluminum plate.

[0107] The second conductor 200 may be a copper plate, and there is no limitation on the thickness or width of the copper plate, but it is preferred to have the same thickness and width as the first conductor 100.

[0108] In the second rolling step S70, the first conductor 100 and the second conductor 200 are unfolded and continuously supplied to the rolling mill so that the second conductor 200 is continuously press-welded to a preset thickness on the upper and lower surfaces of the first conductor 100.

[0109] In the second cutting step S80, the second conductor 200 located at the top and bottom is cut to a predetermined width so that a portion of the first conductor 100 in the rolled laminate is exposed.

[0110] In one embodiment, the second cutting step S80 is to use a cutting tool T to continuously cut the middle portion of the second conductor 200 of the rolled laminate in the length direction, so that the center of the first conductor 100 is continuously exposed.

[0111] In one embodiment, the second cutting step S80 involves placing a cutting tool T along the width direction, which is perpendicular to the length direction of the second conductor 200 of the rolled laminate, to cut the second conductor 200 with a predetermined width, and repeatedly forming the cut portion at predetermined intervals, thereby continuously forming portions exposing the first conductor 100 at predetermined intervals.

[0112] Therefore, in the laminate, the portion of the first conductor 100 exposed by the second cutting step S80 has a thinner thickness than the portion of the first conductor 100 not exposed.

[0113] On the other hand, it should be stated in advance that when cutting the second conductor 200 with the cutting tool T to expose the first conductor 100, there is no limitation on the cutting depth or cutting width.

[0114] In the second molding step S90, the cut laminated sheet is placed into a molding machine for compression molding to form a busbar shape with second conductors 200 at both ends and the first conductor 100 exposed between the second conductors 200.

[0115] That is, the second forming step S90 may include the process required to form the busbar, including: a cutting process, cutting the laminated sheet according to the shape of the busbar to be manufactured; a bending process, bending the busbar with a predetermined curvature; a trimming process, removing a portion of the busbar; and a punching process, forming holes at the terminal portion of the busbar.

[0116] The forming machine is preferably a stamping machine, but it is not limited to this. It should be noted in advance that the shape of the busbar is not limited.

[0117] The fusible busbar manufactured by the fusible busbar manufacturing method of the present invention as described above has a configuration in which second conductors 200 are arranged at both ends in the length direction and a first conductor 100 is exposed between the second conductors 200, thereby enabling the first conductor 100, which has high conductivity and is made of an aluminum plate with a melting point lower than copper and is exposed at the center of the busbar, to perform the function of a fusible part.

[0118] Figure 9 This is a flowchart of the fourth embodiment of the fusing busbar manufacturing method of the present invention.

[0119] Reference Figure 9 The description will be provided, but detailed descriptions of structures that are repeated in the above embodiments or have the same reference numerals will be omitted.

[0120] In one embodiment, the method for manufacturing a fusible busbar of the present invention may further include a second winding step S110 of winding a cut laminated sheet.

[0121] Therefore, the wound and cut laminated sheets are not only easy to transport, handle and store, but also allow for more efficient busbar forming by adjusting the supply speed of the wound laminated sheets when using them to form busbars.

[0122] In one embodiment, the method for manufacturing a fusible busbar of the present invention may further include a heating step S100, wherein the heating step S100 is to unfold the first conductor 100 and the second conductor 200 respectively and place them into a heating furnace and heat them to different temperatures.

[0123] The heating step S100 includes a first heating process S101, a second heating process S102, and a reduction process S103, to heat the first conductor 100 and the second conductor 200 respectively.

[0124] In the first heating process S101, the first conductor 100 is placed inside the heating furnace and heated to 350-450°C.

[0125] Thus, the first heating process S101 increases the rolling rate of the first conductor 100 made of aluminum plate, thereby improving the processability during the rolling process and increasing the adhesion rate of the structure when pressure-welded with the second conductor 200.

[0126] In the second heating process S102, the second conductor 200 is placed inside the heating furnace and heated to 750-850°C.

[0127] Thus, the rolling rate of the second conductor 200 made of copper plate is increased through the second heating process S102, thereby improving the processability during the rolling step and improving the microstructure adhesion rate when pressure-welded with the first conductor 100.

[0128] On the other hand, it is well known that when two or more metals are joined, an intermetallic compound different from the joined metals is formed at the joint. This intermetallic compound reduces the conductivity of the interface, and is therefore a factor that reduces the performance or efficiency of the fusible busbar.

[0129] In addition, if the intermetallic compound layer is thick, brittle fracture is more likely to occur inside, reducing the bonding strength between different types of metals, which is a factor that reduces durability and lifespan.

[0130] Therefore, by heating the first conductor 100 and the second conductor 200 to different temperatures through the first heating process S101 and the second heating process S102 respectively, the rolling rate and the microstructure adhesion rate are improved, thereby reducing the intermetallic compounds formed when the first conductor 100 and the second conductor 200 are welded in the rolling step, preventing the conductivity from decreasing due to the intermetallic compounds, and minimizing the thickness of the intermetallic compound layer to prevent brittle fracture inside, thereby further improving the adhesion strength between the first conductor 100 and the second conductor 200.

[0131] In the reduction process S103, the oxide layer formed on the surface of the second conductor 200 in the second heating process S102 is removed.

[0132] In one embodiment, the reduction process S103 involves reacting carbon with the copper oxide layer on the surface of the second conductor 200 to remove the copper oxide layer.

[0133] In one embodiment, the reduction process S103 involves irradiating the surface of the oxidized second conductor 200 with a laser to remove the copper oxide layer.

[0134] At this time, the wavelength of the laser is preferably 1064-1070nm, and the output power of the laser is preferably 50-500W.

[0135] On the other hand, it is well known that when a copper plate is heated, a copper oxide layer is formed on the surface of the copper plate. The formed copper oxide layer is a factor that increases the mass, and not only that, it increases the resistance, but also reduces the conductivity.

[0136] Therefore, if an oxide layer is formed on the surface of the second conductor 200 made of copper plate during the second heating process S102, the oxide layer can be removed by the reduction process S103, thereby preventing the increase in weight and the reduction in conductivity due to the copper oxide layer.

[0137] The embodiments of the present invention have been described in detail above, but the scope of the present invention is not limited thereto. Various modifications and improvements made by those skilled in the art using the basic concepts defined in the claims are also included within the scope of the present invention.

Claims

1. A method for manufacturing a fusible busbar, comprising: In the first configuration step (S10), a second conductor (200) that is wound into a roll and made of a different material than the first conductor (100) is respectively configured on the upper and lower parts of both sides of the first conductor (100) that is wound into a roll. In the first rolling step (S20), the first conductor (100) and the second conductor (200) are unfolded and continuously supplied to the rolling mill. The second conductor (200) is continuously press-welded to a preset thickness on both sides of the upper and lower surfaces of the first conductor (100) at a predetermined interval, so that the sides are thicker than the center. In the first cutting step (S40), the inner end of the second conductor (200) is cut along the length of the rolled laminate with a predetermined width; In the first forming step (S30), the laminated sheet formed by rolling the first conductor (100) and the second conductor (200) is fed into a forming machine for compression forming, thereby forming a busbar shape with the second conductor (200) at both ends and the first conductor (100) exposed between the second conductors (200). The first conductor (100) is an aluminum plate, and the second conductor (200) is a copper plate.

2. A method for manufacturing a fusible busbar, comprising: In the second configuration step (S60), a second conductor (200) that is wound into a roll and uses a different material from the first conductor (100) is respectively configured on the upper and lower sides of the first conductor (100) that is wound into a roll. In the second rolling step (S70), the first conductor (100) and the second conductor (200) are unfolded and continuously supplied to the rolling mill to press-weld the second conductor (200) onto the upper and lower surfaces of the first conductor (100). In the second cutting step (S80), the second conductor (200) located at the upper and lower parts is cut with a predetermined width so that a portion of the first conductor (100) of the rolled laminate is exposed; In the second forming step (S90), the cut laminated sheet is fed into a forming machine for compression forming, thereby forming a busbar shape with second conductors (200) at both ends and the first conductor (100) exposed between the second conductors (200). The first conductor (100) is an aluminum plate, and the second conductor (200) is a copper plate.

3. The method for manufacturing a fusible busbar according to claim 1 or 2, characterized in that, Also includes: In the heating step (S100), the first conductor (100) and the second conductor (200) are unfolded and then placed into the heating furnace and heated to different temperatures.

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