Connecting structure and method for manufacturing the connecting structure

Abstract

The present invention provides a connection structure that allows for free adjustment of the connection angle between the first and second connecting members while suppressing an increase in the thickness of the connection portion between the first and second connecting members. [Solution] The connecting structure 1 comprises a first connecting member 10 including a first conductor 11 and a second connecting member 20 including a second conductor 21. The first conductor 11 includes a first base 12 and a first thin-walled portion 13, and the second conductor 21 includes a second base 22 and a second thin-walled portion 23. The thickness of the first thin-walled portion 13 is thinner than the first base 12 over the entire width direction Y of the first conductor 11, and the thickness of the second thin-walled portion 23 is thinner than the second base 22 over the entire width direction Y of the second conductor 21. The first connecting surface 13a and the second connecting surface 23a are in contact with each other, thereby connecting the first connecting surface 13a and the second connecting surface 23a.

Description

Technical Field

[0001] The present invention relates to a connection structure and a method for manufacturing the connection structure.

Background Art

[0002] In a bus bar used for an electric vehicle battery or the like, when the bus bars are connected, the conductor portions overlap, so that the thickness of the connection portion of the bus bar increases. Therefore, conventionally, it is known to form an engagement groove in the bus bar.

[0003] Patent Document 1 discloses a bus bar including a first joining member having an engagement groove recessed so that opposing surfaces opposing in a direction intersecting the stacking direction are set, and a second joining member having an engagement piece inserted into the engagement groove. The first joining member and the second joining member are ultrasonically joined between the engagement groove and the engagement piece. In Patent Document 1, an increase in the thickness of the joining portion of the bus bar is suppressed by the above configuration.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the bus bar described in Patent Document 1, the engagement piece of the second joining member is inserted into the engagement groove of the first joining member and ultrasonically joined. Therefore, the connection direction between the first joining member and the second joining member is fixed, and their connection angles cannot be freely adjusted.

[0006] This invention has been made in view of the problems of the prior art. The object of this invention is to provide a connection structure and a method for manufacturing a connection structure that allows for free adjustment of the connection angle between the first connecting member and the second connecting member while suppressing an increase in the thickness of the connection portion between the first connecting member and the second connecting member. [Means for solving the problem]

[0007] A connection structure according to an aspect of the present invention comprises a first connecting member including a first conductor and a second connecting member including a second conductor. The first conductor is a busbar. The first conductor includes a first base and a first thin-walled portion that is continuously connected to the first base on the same plane and is thinner than the first base. The second conductor includes a second base and a second thin-walled portion that is continuously connected to the second base on the same plane and is thinner than the second base. The shape of the second thin-walled portion as viewed from the longitudinal direction of the second conductor is rectangular. The first thin-walled portion is provided at the tip of the first conductor, and the thickness of the first thin-walled portion is thinner than the first base over the entire width direction of the first conductor. The second thin-walled portion is provided at the tip of the second conductor, and the thickness of the second thin-walled portion is thinner than the second base over the entire width direction of the second conductor. The first thin-walled portion has a first connecting surface that is located on a plane different from the surface of the first base. The second thin-walled portion has a second connecting surface located on a plane different from the surface of the second base portion. The first connecting member and the second connecting member are connected by contact between the first connecting surface and the second connecting surface.

[0008] A method for manufacturing a connecting structure according to another aspect of the present invention includes the steps of preparing a first connecting member including a first conductor and a second connecting member including a second conductor, and connecting the first connecting member and the second connecting member. The first conductor is a busbar. The first conductor includes a first base and a first thin-walled portion that is continuously connected to the first base on the same plane and is thinner than the first base. The second conductor includes a second base and a second thin-walled portion that is continuously connected to the second base on the same plane and is thinner than the second base. The shape of the second thin-walled portion as viewed from the longitudinal direction of the second conductor is rectangular. The first thin-walled portion is provided at the tip of the first conductor, and the thickness of the first thin-walled portion is thinner than the first base over the entire width direction of the first conductor. The second thin-walled portion is provided at the tip of the second conductor, and the thickness of the second thin-walled portion is thinner than the second base over the entire width direction of the second conductor. The first thin-walled portion has a first connecting surface located on a plane different from the surface of the first base. The second thin-walled portion has a second connecting surface located on a plane different from the surface of the second base. The connecting structure is formed when the first connecting surface and the second connecting surface come into contact, thereby connecting the first connecting member and the second connecting member. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a connection structure and a method for manufacturing a connection structure that allows for free adjustment of the connection angle between the first connecting member and the second connecting member while suppressing an increase in the thickness of the connection portion between the first connecting member and the second connecting member. [Brief explanation of the drawing]

[0010] [Figure 1] This is a perspective view showing an example of the state before connecting the first connecting member and the second connecting member. [Figure 2] This is a plan view showing an example of the state before the first connecting member and the second connecting member are connected. [Figure 3] This is a side view of the first connecting member or the second connecting member as seen from the longitudinal direction. [Figure 4] An example of the state after connecting the first connecting member and the second connecting member is shown. [Figure 5]Another example of the state after connecting the first connecting member and the second connecting member is shown. [Modes for carrying out the invention]

[0011] The following describes in detail the connecting structure and the method for manufacturing the connecting structure according to this embodiment, using the drawings. Note that the dimensional ratios in the drawings are exaggerated for illustrative purposes and may differ from the actual ratios.

[0012] [Connection structure] First, the connection structure 1 according to this embodiment will be described with reference to the drawings. Figure 1 is a perspective view showing an example of the state before the first connecting member 10 and the second connecting member 20 are connected. Figure 2 is a plan view showing an example of the state before the first connecting member 10 and the second connecting member 20 are connected. Figure 3 is a side view of the first connecting member 10 or the second connecting member 20 as seen from the length direction X. Figure 4 shows an example of the state after the first connecting member 10 and the second connecting member 20 are connected. In this specification, the length direction of the first connecting member 10, the first conductor 11, the second connecting member 20, or the second conductor 21 will be described as direction X, the width direction as direction Y, and the thickness direction as direction Z.

[0013] As shown in Figures 1 to 4, the connection structure 1 according to this embodiment comprises a first connecting member 10 and a second connecting member 20. In this embodiment, the shapes of the first connecting member 10 and the second connecting member 20 are the same, but they may be different. The first connecting member 10 includes a first conductor 11. The second connecting member 20 includes a second conductor 21. In the connection structure 1, the first connecting member 10 and the second connecting member 20 are mechanically and electrically connected.

[0014] The first conductor 11 is a busbar. The busbar may include a flat conductor with a rectangular cross-section. The busbar may be covered with an insulating coating material including an insulating material. For example, the first connecting member 10 may include the first conductor 11 which is a busbar and an insulating coating material (not shown) that covers the first conductor 11.

[0015] The second conductor 21 may be a busbar or a bundle of strands containing multiple strands. If the second conductor 21 is a busbar, it may be the same as or different from the first conductor 11. For example, the shape of the second conductor 21 may be the same as or different from the shape of the first conductor 11. Also, the material of the second conductor 21 may be the same as or different from the material of the first conductor 11. The second connecting member 20 may include the second conductor 21 which is a busbar and an insulating covering material (not shown) that covers the second conductor 21.

[0016] The second connecting member 20 is an electric wire and may include a second conductor 21 which is a bundle of strands and an insulating covering material (not shown) which covers the outer circumference of the second conductor 21. The bundle of strands may include multiple strands and may be composed of multiple strands bundled together. At the end of the bundle of strands, the multiple strands may be crimped together so that the end of the bundle of strands is formed into a plate shape. The multiple strands may include a stranded wire composed of multiple strands bundled together. Furthermore, the bundle of strands may consist of only one stranded wire, or it may be a composite stranded wire composed of multiple stranded wires bundled together.

[0017] From the viewpoint of material cost and heat generation during current flow, each of the multiple strands preferably contains copper or aluminum. The material of each strand may be, for example, copper, aluminum, or an alloy containing these metals. From the viewpoint of weight reduction, each of the multiple strands preferably is formed of aluminum or an aluminum alloy.

[0018] The insulating coating material covering the busbar may contain resin. From the viewpoint of bending properties, insulating properties, dielectric strength properties, heat resistance properties, and applicability to automobiles, it is preferable that the insulating coating material covering the busbar contains a resin containing polyamide such as polyamide 12 (PA12).

[0019] As the insulating coating material that coats a plurality of strands, a thermoplastic resin capable of ensuring electrical insulation can be used. The insulating coating material may include, for example, at least one of an olefin resin and polyvinyl chloride. The olefin resin may include, for example, at least one resin selected from the group consisting of polyethylene (PE), polypropylene (PP), an ethylene copolymer, and a propylene copolymer.

[0020] The first conductor 11 includes a first base portion 12 and a first thin portion 13. The first base portion 12 has a rectangular cross-section perpendicular to the length direction X of the first conductor 11 and extends in the length direction X of the first conductor 11. The first base portion 12 may be coated with an insulating coating material.

[0021] The first thin portion 13 is continuously connected on the same plane as the first base portion 12. The first thin portion 13 is provided at the tip of the first conductor 11. Also, the first thin portion 13 is thinner than the first base portion 12. Specifically, the thickness of the first thin portion 13 is thinner than the first base portion 12 across the entire width direction Y of the first conductor 11.

[0022] The thickness of the first thin portion 13 may be 10% or more, 20% or more, 30% or more, 40% or more, or 50% or more of the thickness of the first base portion 12. Also, the thickness of the first thin portion 13 may be 90% or less, 80% or less, 70% or less, 60% or less, or 50% or less of the thickness of the first base portion 12. The greater the thickness of the first thin portion 13, the higher the rigidity of the first thin portion 13 can be. Also, the thinner the thickness of the first thin portion 13, the thinner the thickness of the connection portion 33 when connected to the second thin portion 23 can be. When the first connecting member 10 includes an insulating coating material, the insulating coating material at the end of the first connecting member 10 is peeled off and the first thin portion​​The first base portion 12 has a first surface 12a and a second surface 12b located on the opposite side of the first surface 12a in the thickness direction Z. The first thin-walled portion 13 has a first connecting surface 13a and a first non-connecting surface 13b located on the opposite side of the first connecting surface 13a in the thickness direction Z. The first connecting surface 13a is located on a different plane from the first surface 12a of the first base portion 12. The first non-connecting surface 13b is located on the same plane as the second surface 12b of the first base portion 12. The first surface 12a and the first connecting surface 13a face the same direction. The second surface 12b and the first non-connecting surface 13b face the same direction. A step is provided between the first base portion 12 and the first thin-walled portion 13.

[0024] The second conductor 21 includes a second base portion 22 and a second thin-walled portion 23. The second base portion 22 extends in the longitudinal direction X of the second conductor 21. The second base portion 22 may be covered with an insulating coating material. The cross-section of the second base portion 22 perpendicular to the longitudinal direction X of the second conductor 21 may be rectangular or circular. The thickness of the second base portion 22 may be 70% or more, 80% or more, or 90% or more of the thickness of the first base portion 12. The thickness of the second base portion 22 may be 130% or less, 120% or less, or 110% or less of the thickness of the first base portion 12.

[0025] The second thin-walled portion 23 is continuously connected to the second base portion 22 on the same plane. The second thin-walled portion 23 is provided at the tip of the second conductor 21. The second thin-walled portion 23 is thinner than the second base portion 22. Specifically, the thickness of the second thin-walled portion 23 is thinner than that of the second base portion 22 over the entire width direction Y of the second conductor 21.

[0026] The thickness of the second thin-walled portion 23 may be 10% or more, 20% or more, 30% or more, 40% or more, or 50% or more of the thickness of the second base portion 22. Alternatively, the thickness of the second thin-walled portion 23 may be 90% or less, 80% or less, 70% or less, 60% or less, or 50% or less of the thickness of the second base portion 22. The thicker the second thin-walled portion 23, the higher its rigidity can be. Also, the thinner the second thin-walled portion 23, the thinner the connection portion 33 can be when connected to the first thin-walled portion 13. If the second connecting member 20 includes an insulating coating material, the insulating coating material at the end of the second connecting member 20 is peeled off, and the second thin-walled portion 23 is exposed.

[0027] The second base portion 22 has a first surface 22a and a second surface 22b located on the opposite side of the first surface 22a in the thickness direction Z. The second thin-walled portion 23 has a second connecting surface 23a and a second non-connecting surface 23b located on the opposite side of the second connecting surface 23a in the thickness direction Z. The second connecting surface 23a is located on a different plane from the second surface 22b of the second base portion 22. The second non-connecting surface 23b is located on the same plane as the second surface 22b of the second base portion 22. The second surface 22b and the second connecting surface 23a face the same direction. Also, the second surface 22b and the second non-connecting surface 23b face the same direction. Furthermore, a step is provided between the second base portion 22 and the second thin-walled portion 23.

[0028] In the connecting structure 1, the first connecting member 10 and the second connecting member 20 are connected by contact between the first connecting surface 13a and the second connecting surface 23a. The thickness of the connecting portion 33, where the first thin-walled portion 13 and the second thin-walled portion 23 are connected, is thinner than the combined thickness of the first base portion 12 and the second base portion 22. The thickness of the connecting portion 33 may be 50% or more, 70% or more, or 90% or more of the thickness of the first base portion 12 or the second base portion 22. The thickness of the connecting portion 33 may be 130% or less, 110% or less, or 100% or less of the thickness of the first base portion 12 or the second base portion 22.

[0029] For example, the thickness of the first base portion 12 and the thickness of the second base portion 22 are made the same. Then, if the thickness of the first thin-walled portion 13 is half that of the first base portion 12, and the thickness of the second thin-walled portion 23 is half that of the second base portion 22, the thickness of the connecting portion 33 will be the same as the thickness of the first base portion 12 or the second base portion 22. In this way, even when the first connecting member 10 and the second connecting member 20 are overlapped and connected, it is possible to suppress the thickness of the connecting portion 33 from becoming too thick.

[0030] As shown in Figure 3, the shape of the second thin-walled portion 23 as viewed from the longitudinal direction X of the second conductor 21 is rectangular. This shape facilitates the connection between the first thin-walled portion 13 of the busbar, which is the first conductor 11, and the second thin-walled portion 23.

[0031] The first thin-walled portion 13 has a first arc portion 13c. The second thin-walled portion 23 has a second arc portion 23c. Specifically, the first thin-walled portion 13 and the second thin-walled portion 23 are arc-shaped. The first arc portion 13c and the second arc portion 23c prevent the tip of the first thin-walled portion 13 from interfering with the first base portion 12 and the tip of the second thin-walled portion 23 from interfering with the second base portion 22, compared to the case where the tip is rectangular in plan view. For example, the connection angle between the first connecting member 10 and the second connecting member 20 can be easily adjusted by rotating the first thin-walled portion 13 while bringing it into contact with the first connecting surface 13a of the first thin-walled portion 13 and the second connecting surface 23a of the second thin-walled portion 23.

[0032] As described above, in the prior art, the method of connecting the first connecting member and the second connecting member was limited to ultrasonic bonding. However, according to the manufacturing method of the connecting structure 1 according to this embodiment, the first connecting member 10 and the second connecting member 20 can be connected by various methods, without being limited to this configuration. Specifically, the first connecting surface 13a and the second connecting surface 23a may be connected by welding. The welding may be pressure welding such as ultrasonic welding and resistance welding, or a combination thereof.

[0033] The length L1 of the first thin-walled portion 13 may be greater than or equal to the width D1 of the first thin-walled portion 13, and the length L2 of the second thin-walled portion 23 may be greater than or equal to the width D2 of the second thin-walled portion 23. For example, if the length L1 of the first thin-walled portion 13 is equal to the width D1 of the first thin-walled portion 13, and the length L2 of the second thin-walled portion 23 is equal to the width D2 of the second thin-walled portion 23, the range of motion R around the axis P1 of the first connecting member 10 and the second connecting member 20 can be set to -90° ≤ R ≤ 90°. Also, as shown in Figure 5, if the length L1 of the first thin-walled portion 13 is less than the width D1 of the first thin-walled portion 13, and the length L2 of the second thin-walled portion 23 is less than the width D2 of the second thin-walled portion 23, the range of motion R can be made even wider compared to the case where L = D.

[0034] [Manufacturing method for connecting structures] Next, the method for manufacturing the connecting structure 1 will be described. The method for manufacturing the connecting structure 1 includes a preparation step and a connection step.

[0035] As shown in Figures 1 to 3, in the preparation step, a first connecting member 10 including a first conductor 11 and a second connecting member 20 including a second conductor 21 are prepared.

[0036] In the connection process, the first connecting member 10 and the second connecting member 20 are connected. By connecting the first connecting member 10 and the second connecting member 20, a connection structure 1 as shown in Figure 4 or Figure 5 can be manufactured. The method of connecting the first connecting member 10 and the second connecting member 20 is not particularly limited. As described above, the first connecting surface 13a and the second connecting surface 23a may be connected by welding. The welding may be pressure welding such as ultrasonic welding and resistance welding, or a combination thereof.

[0037] As described above, the connection structure 1 according to this embodiment comprises a first connecting member 10 including a first conductor 11 and a second connecting member 20 including a second conductor 21. The first conductor 11 is a busbar. The first conductor 11 includes a first base portion 12 and a first thin-walled portion 13 that is continuously connected to the first base portion 12 on the same plane and is thinner than the first base portion 12. The second conductor 21 includes a second base portion 22 and a second thin-walled portion 23 that is continuously connected to the second base portion 22 on the same plane and is thinner than the second base portion 22. The shape of the second thin-walled portion 23 as viewed from the length direction X of the second conductor 21 is rectangular. The first thin-walled portion 13 is provided at the tip of the first conductor 11, and the thickness of the first thin-walled portion 13 is thinner than the first base portion 12 over the entire width direction Y of the first conductor 11. The second thin-walled portion 23 is provided at the tip of the second conductor 21, and the thickness of the second thin-walled portion 23 is thinner than that of the second base portion 22 over the entire width direction Y of the second conductor 21. The first thin-walled portion 13 has a first connecting surface 13a which is located on a plane different from the first surface 12a of the first base portion 12. The second thin-walled portion 23 has a second connecting surface 23a which is located on a plane different from the first surface 22a of the second base portion 22. The first connecting member 10 and the second connecting member 20 are connected by contact between the first connecting surface 13a and the second connecting surface 23a.

[0038] In the connection structure 1 according to this embodiment, the first conductor 11 includes a first thin-walled portion 13, and the second conductor 21 includes a second thin-walled portion 23. The first connecting member 10 and the second connecting member 20 are connected by contact between the first connecting surface 13a of the first thin-walled portion 13 and the second connecting surface 23a of the second thin-walled portion 23. As a result, the thickness of the connection portion 33 between the first connecting member 10 and the second connecting member 20 can be reduced.

[0039] Furthermore, in the connection structure 1 according to this embodiment, the first thin-walled portion 13 is provided at the tip of the first conductor 11, and the thickness of the first thin-walled portion 13 is thinner than that of the first base portion 12 over the entire width direction Y of the first conductor 11. Also, the second thin-walled portion 23 is provided at the tip of the second conductor 21, and the thickness of the second thin-walled portion 23 is thinner than that of the second base portion 22 over the entire width direction Y of the second conductor 21. With this configuration, the connection angle between the first connecting member 10 and the second connecting member 20 is not restricted, and the connection direction between the first connecting member 10 and the second connecting member 20 is not fixed.

[0040] Therefore, according to the connection structure 1 of this embodiment, the connection angle between the first connecting member 10 and the second connecting member 20 can be freely adjusted while suppressing an increase in the thickness of the connection portion 33 between the first connecting member 10 and the second connecting member 20.

[0041] Furthermore, appropriate adhesion is required between the busbar and the insulating coating material. If the adhesion is insufficient, wrinkles or cracks may occur in the insulating coating material when the busbar is bent, potentially compromising the insulation performance of the insulating coating material. On the other hand, if the adhesion is too high, it becomes difficult to remove the insulating coating material from the conductor. However, in the connection structure 1 according to this embodiment, bending of the busbar is not required, so sufficient adhesion is needed to ensure overall contact between the busbar and the insulating coating material without delamination, thus reducing concerns about a decrease in insulation performance. In addition, when bending the busbar using a highly flexible insulating coating material, the thickness of the insulating coating material in the bent portion may decrease, potentially compromising insulation performance and durability. However, in the connection structure 1 according to this embodiment, bending of the busbar is not required, allowing the use of a wide variety of insulating coating materials, including those with higher flexibility than conventional materials.

[0042] Furthermore, bending the busbar reduces the cross-sectional area of ​​the bent portion, which increases heat generation due to Joule heating and may reduce vibration durability. However, in the connection structure 1 according to this embodiment, it is not necessary to bend the first connecting member 10 or the second connecting member 20, thus suppressing a decrease in vibration durability.

[0043] Furthermore, according to the connection structure 1 of this embodiment, the connection angle between the first connecting member 10 and the second connecting member 20 can be freely adjusted. Therefore, a straight busbar can be manufactured, and the first connecting member 10 and the second connecting member 20 can be connected at the desired angle as needed. As a result, a straight busbar can reduce the empty space inside the transport case and reduce the package size compared to a bent busbar, thereby reducing transport costs.

[0044] The second conductor 21 may be a busbar or a bundle of strands containing multiple strands. The first conductor 11 is a busbar, and the first connecting member 10 and the second connecting member 20 can be connected even if the second conductor 21 is a busbar or a bundle of strands.

[0045] The first thin-walled portion 13 may have a first arc portion 13c, and the second thin-walled portion 23 may have a second arc portion 23c. With this configuration, interference between the tip of the first thin-walled portion 13 and the first base portion 12 can be suppressed, and interference between the tip of the second thin-walled portion 23 and the second base portion 22 can be suppressed. Therefore, the connection direction between the first connecting member 10 and the second connecting member 20 can be easily adjusted.

[0046] The first connecting surface 13a and the second connecting surface 23a may be connected by welding. In the connecting structure 1 according to this embodiment, the connection is not limited to ultrasonic welding and can be made by various methods. However, by connecting the first connecting surface 13a and the second connecting surface 23a by welding, the first connecting member 10 and the second connecting member 20 can be easily connected.

[0047] The length L1 of the first thin-walled portion 13 may be greater than or equal to the width D1 of the first thin-walled portion 13, and the length L2 of the second thin-walled portion 23 may be greater than or equal to the width D2 of the second thin-walled portion 23. With this configuration, the connection angle between the first connecting member 10 and the second connecting member 20 can be widened. Therefore, the connection angle between the first connecting member 10 and the second connecting member 20 can be adjusted even more freely.

[0048] As described above, the manufacturing method of the connection structure 1 according to this embodiment includes the steps of preparing a first connecting member 10 including a first conductor 11 and a second connecting member 20 including a second conductor 21, and connecting the first connecting member 10 and the second connecting member 20. The first conductor 11 is a busbar. The first conductor 11 includes a first base portion 12 and a first thin-walled portion 13 that is continuously connected to the first base portion 12 on the same plane and is thinner than the first base portion 12. The second conductor 21 includes a second base portion 22 and a second thin-walled portion 23 that is continuously connected to the second base portion 22 on the same plane and is thinner than the second base portion 22. The shape of the second thin-walled portion 23 as viewed from the length direction X of the second conductor 21 is rectangular. The first thin-walled portion 13 is provided at the tip of the first conductor 11, and the thickness of the first thin-walled portion 13 is thinner than the first base portion 12 over the entire width direction Y of the first conductor 11. The second thin-walled portion 23 is provided at the tip of the second conductor 21, and the thickness of the second thin-walled portion 23 is thinner than that of the second base portion 22 over the entire width direction Y of the second conductor 21. The first thin-walled portion 13 has a first connecting surface 13a which is located on a plane different from the first surface 12a of the first base portion 12. The second thin-walled portion 23 has a second connecting surface 23a which is located on a plane different from the first surface 22a of the second base portion 22. The connecting structure 1 connects the first connecting member 10 and the second connecting member 20 by contact between the first connecting surface 13a and the second connecting surface 23a.

[0049] Therefore, it is possible to manufacture a connection structure 1 that allows for free adjustment of the connection angle between the first connecting member 10 and the second connecting member 20 while suppressing an increase in the thickness of the connection portion 33 between the first connecting member 10 and the second connecting member 20.

[0050] Although this embodiment has been described above, this embodiment is not limited to these, and various modifications are possible within the scope of the gist of this embodiment. [Explanation of Symbols]

[0051] 1. Connection Structure 10 First connecting member 11 First conductor 12 1st base 12a 1st surface 13 1st thin section 13a First connection surface 13c First arc section 20 Second connecting member 21 Second Conductor 22 Second base 22a 1st surface 23 2nd thin section 23a Second connection surface 23c Second arc section

Claims

1. A first connecting member including a first conductor, A second connecting member including a second conductor, Equipped with, The first conductor is a busbar, The first conductor includes a first base and a first thin-walled portion that is continuously connected to the first base on the same plane and is thinner than the first base. The second conductor includes a second base and a second thin-walled portion that is continuously connected to the second base on the same plane and is thinner than the second base. The shape of the second thin-walled portion, as viewed from the longitudinal direction of the second conductor, is rectangular. The first thin-walled portion is provided at the tip of the first conductor, and the thickness of the first thin-walled portion is thinner than the first base portion over the entire width direction of the first conductor. The second thin-walled portion is provided at the tip of the second conductor, and the thickness of the second thin-walled portion is thinner than that of the second base portion throughout the width direction of the second conductor. The first thin-walled portion has a first connecting surface that is located on a plane different from the surface of the first base portion. The second thin-walled portion has a second connecting surface that is located on a plane different from the surface of the second base portion. A connection structure in which the first connecting surface and the second connecting surface are in contact, thereby connecting the first connecting member and the second connecting member.

2. The connection structure according to claim 1, wherein the second conductor is a busbar or a bundle of strands including a plurality of strands.

3. The connecting structure according to claim 1 or 2, wherein the first thin-walled portion has a first arc portion, and the second thin-walled portion has a second arc portion.

4. The connection structure according to claim 1 or 2, wherein the first connection surface and the second connection surface are connected by welding.

5. The connecting structure according to claim 1 or 2, wherein the length of the first thin-walled portion is greater than or equal to the width of the first thin-walled portion, and the length of the second thin-walled portion is greater than or equal to the width of the second thin-walled portion.

6. A step of preparing a first connecting member including a first conductor and a second connecting member including a second conductor, A step of connecting the first connecting member and the second connecting member, A method for manufacturing a connecting structure, including, The first conductor is a busbar, The first conductor includes a first base and a first thin-walled portion that is continuously connected to the first base on the same plane and is thinner than the first base. The second conductor includes a second base and a second thin-walled portion that is continuously connected to the second base on the same plane and is thinner than the second base. The shape of the second thin-walled portion, as viewed from the longitudinal direction of the second conductor, is rectangular. The first thin-walled portion is provided at the tip of the first conductor, and the thickness of the first thin-walled portion is thinner than the first base portion over the entire width direction of the first conductor. The second thin-walled portion is provided at the tip of the second conductor, and the thickness of the second thin-walled portion is thinner than that of the second base portion throughout the width direction of the second conductor. The first thin-walled portion has a first connecting surface that is located on a plane different from the surface of the first base portion. The second thin-walled portion has a second connecting surface that is located on a plane different from the surface of the second base portion. A method for manufacturing a connection structure, wherein the first connection member and the second connection member are connected by contact between the first connection surface and the second connection surface.

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