An electrical connection strip structure and an electrical connection structure

Abstract

The application discloses an electric connection strip structure and an electric connection structure. The electric connection strip structure is used for overlapping with other conductive strip structures and connecting the electric connection strip structure and the other conductive strip structures through bolts. The electric connection strip structure comprises a connection strip body and a reinforcing column. The reinforcing column penetrates through the connection strip body along the thickness direction of the connection strip body and is connected with the connection strip body. The reinforcing column is provided with bolts which are connected with the bolts. The mechanical strength of the reinforcing column is higher than that of the connection strip body. The thickness of the reinforcing column is greater than or equal to that of the connection strip body. The application ensures the connection stability between two conductive strips.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, and in particular to an electrical connection bus structure and an electrical connection structure. Background Technology

[0002] With the development of new energy technologies, product categories that use battery packs as the primary power source have emerged in various industries, most notably the automotive industry, where the global adoption of new energy vehicles is unstoppable. Battery packs, as power supply components, are receiving increasing attention.

[0003] As the charging power of battery packs increases, the current within the pack also increases, requiring higher durability in the internal electrical connection structure. Current battery packs typically use copper busbar-to-copper or copper busbar-to-aluminum busbar connections for these connections. While copper busbar-to-copper connections offer high durability, their increased weight limits the overall weight reduction of the battery pack. Using copper busbar-to-aluminum busbar connections allows for greater weight reduction, but the lower strength of aluminum busbars makes them susceptible to creep under temperature and vibration, potentially causing the connecting bolts between the two busbars to loosen and ultimately leading to electrical connection failure. Summary of the Invention

[0004] The main objective of this invention is to provide an electrical connection busbar structure and an electrical connection structure, which aims to improve the technical problem in the prior art where connection failure occurs when two conductive busbars are connected due to insufficient material strength of one of the electrical connection busbars.

[0005] The embodiments of the present invention first propose an electrical connection bus structure for overlapping with other conductive bus structures and connected by bolts, comprising:

[0006] Connect the main body of the connector;

[0007] A reinforcing column extends through the connecting strip body along its thickness direction and is connected to the connecting strip body. The reinforcing column has a pre-drilled through hole for connection with the bolt. The mechanical strength of the reinforcing column is higher than that of the connecting strip body, and the thickness of the reinforcing column is greater than or equal to the thickness of the connecting strip body.

[0008] An embodiment of the present invention further proposes an electrical connection structure, comprising:

[0009] The first connecting row structure includes a first connecting row;

[0010] The second connecting bar structure is the electrical connecting bar structure described above, including a second connecting bar and a reinforcing column. The second connecting bar is the connecting bar body of the electrical connecting bar structure described above, and the second connecting bar overlaps with the first connecting bar.

[0011] A bolt, which is connected to the through hole and penetrates the first connecting row along the thickness direction of the second connecting row;

[0012] A nut is attached to one end of the bolt and, together with the bolt, connects the first connecting row to the second connecting row.

[0013] In some embodiments of the present invention, the second connecting bar is made of the first material, the reinforcing column is made of the second material, and the first electrical connecting bar is made of the second material. Both the second material and the first material are conductive materials.

[0014] In some embodiments of the present invention, the first material is aluminum and the second material is copper.

[0015] In some embodiments of the present invention, the first connecting bar is also the above-described electrical connecting bar structure. The first connecting bar structure includes a first connecting bar and a first reinforcing post. The second connecting bar structure includes a second connecting bar and a second reinforcing post. The first connecting bar overlaps with the second connecting bar. The first reinforcing post and the second reinforcing post are aligned. The bolt passes through the first reinforcing post and the second reinforcing post and cooperates with the nut to connect the first connecting bar and the second connecting bar.

[0016] In some embodiments of the present invention, one end of the reinforcing post near the first connecting row protrudes from the side surface of the second connecting row near the first connecting row and is connected to the first connecting row, and the first connecting row and the second connecting row overlap around the reinforcing post.

[0017] In some embodiments of the present invention, the end of the reinforcing post away from the first connecting row protrudes from the second connecting row and is connected to the bolt.

[0018] In some embodiments of the present invention, the distance L1 between the end of the reinforcing column near the first connecting row and the side surface of the second connecting row near the first connecting row is 0.2mm-0.4mm; and / or

[0019] The distance L2 between the end of the reinforcing column away from the first connecting row and the side surface of the second connecting row away from the first connecting row is 0.2mm-0.4mm.

[0020] In some embodiments of the present invention, the distance between the end of the reinforcing column near the first connecting row and the side surface of the second connecting row near the first connecting row is a first distance, and the distance between the end of the reinforcing column away from the first connecting row and the side surface of the second connecting row away from the first connecting row is a second distance, wherein the first distance and the second distance are equal.

[0021] In some embodiments of the present invention, the surface of the first connecting bar is covered with an inert metal layer;

[0022] And / or, the surface of the second connecting row is covered with an inert metal layer;

[0023] And / or, the surface of the reinforcing column is covered with an inert metal layer.

[0024] Embodiments of the present invention provide an electrical connector structure and an electrical connection structure. The electrical connector structure includes a connector body and a reinforcing column. The connector body and the reinforcing column are made of two different materials. The mechanical strength of the reinforcing column is greater than that of the connector body. At the same time, the bolt passes through the reinforcing column to connect with other conductive bars. That is, at the connection between the bolt and the electrical connector, a structure with higher mechanical strength is used to replace the original connector body, thereby improving the connection stability between the bolt and the electrical connector structure and preventing situations such as bolt loosening or twisting due to insufficient strength of the electrical connector itself. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the electrical connection bus structure according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of an electrical connection structure according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the electrical connection structure according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram showing the positional relationship between the second connecting row, the first connecting row, and the reinforcing column in one embodiment of the present invention.

[0030] Reference numerals: 10, first connecting row; 20, second connecting row; 21, connecting row body; 30, reinforcing column; 40, bolt; 50, nut. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0035] like Figure 1As shown, the present invention provides an electrical connector structure for overlapping with other conductive busbar structures and connected by bolts 40. The electrical connector structure includes a connector body 21 and a reinforcing post 30. The reinforcing post 30 extends through the connector body 21 along its thickness direction and is connected to it. The reinforcing post 30 has pre-drilled bolt holes for connection with the bolts 40. The mechanical strength of the reinforcing post 30 is greater than that of the connector body, and the thickness of the reinforcing post 30 is greater than or equal to the thickness of the connector body.

[0036] It should be noted that mechanical strength refers to the ability of metallic or non-metallic materials to resist deformation and failure under load. That is, mechanical strength can be increased by structural design or by changing materials.

[0037] The end of the reinforcing column 30 along its thickness direction is flush with or protrudes from the end face of the connecting strip body 21, so that the reinforcing column can bear the pressure generated when the bolts and nuts are tightened instead of the connecting strip body.

[0038] Generally, the reinforcing column 30 and the connecting strip body 21 are fitted with a shaft hole, that is, the connecting strip body 21 is provided with a connecting hole that mates with the reinforcing column 30. This connecting hole and the reinforcing column 30 are connected with an interference fit, or the reinforcing column 30 and the connecting strip body 21 are connected by welding. In other words, the reinforcing column 30 and the connecting strip body 21 are fixedly connected.

[0039] The bolt holes are arranged along the thickness of the connecting strip body 21, that is, they penetrate the reinforcing column 30 along the thickness direction of the reinforcing column 30 to form through holes connecting the two ends of the reinforcing column 30.

[0040] That is, the pressure on the connecting row structure in the vertical direction at the bolt connection is borne by the reinforcing column 30, which has stronger mechanical strength and a thickness greater than or equal to that of the connecting row body 21, thereby avoiding bolt loosening due to insufficient mechanical strength of the connecting row body 21.

[0041] For example, in some embodiments, the electrical connector structure includes a connector body 21 and a reinforcing post 30, both of which are made of conductive material. The connector body 21 and the reinforcing post 30 are made of two different materials: the connector body 21 is made of a first material, and the reinforcing post 30 is made of a second material. The Brinell hardness of the second material is greater than that of the first material. Simultaneously, the bolt 40 passes through the reinforcing post 30 to connect with other conductive connectors. That is, at the connection point between the bolt 40 and the electrical connector, a material with higher hardness is used instead of the original connector body 21, improving the connection stability between the bolt 40 and the electrical connector structure and preventing situations such as bolt 40 unraveling or twisting due to insufficient strength of the electrical connector itself.

[0042] If the main body 21 of the connecting strip is made of aluminum (Britt hardness 60-150) and the reinforcing column 30 is made of copper (Britt hardness 235-878), when the electrical connecting strip is connected to other connecting structures by bolts 40, since the bolts 40 are connected to the reinforcing column 30, the reinforcing column 30 made of copper has stronger resistance to external factors than the connection between the bolts 40 and aluminum, and the connection between copper and bolts 40 is more stable.

[0043] In some embodiments, the reinforcing column 30 may be made of insulation, such as the connecting bar body 21 being made of aluminum and the reinforcing column 30 being made of ceramic. Its main function is to prevent the connection between the aluminum bar and the bolt 40 from deforming due to environmental factors (including but not limited to temperature, vibration, etc.).

[0044] like Figure 2-3 As shown, the present invention also provides an electrical connection structure, including a first connecting bar structure, a second connecting bar structure, a bolt 40, and a nut 50. The first connecting bar structure includes a first connecting bar 10. The second connecting bar structure is the aforementioned electrical connecting bar structure, comprising a second connecting bar 20 and a reinforcing post 30. The second connecting bar 20 is the connecting bar body 21 in the above embodiment. That is, the second connecting bar structure has a connecting bar body 21 made of a first material and a reinforcing post 30 made of a second material. The first connecting bar 10 is stacked on one side of the second connecting bar 20 and overlaps with it. The bolt 40 penetrates the first connecting bar 10 along the thickness direction of the second connecting bar 20. The nut 50 is connected to one end of the bolt 40 and cooperates with the bolt 40 to connect the first connecting bar 10 and the second connecting bar 20.

[0045] It should be noted that during the use of this electrical connection structure, the first connecting bar 10 is connected to object A, the second connecting bar 20 is connected to object B, and the first connecting bar 10 and the second connecting bar 20 are connected to realize the electrical connection between object A and object B.

[0046] Since the electrical connection structure adopts the electrical connection bus structure of the above embodiment, it has at least some or all of the beneficial effects of the above electrical connection bus structure, which will not be described in detail here.

[0047] In some embodiments, the first connecting row 10 and the second connecting row 20 can be straight plate structures or curved plate structures. The first connecting row 10 and the second connecting row 20 can also be irregular plate structures, which can be partially curved and partially straight.

[0048] It is understandable that the first connecting bar 10 and the second connecting bar 20 are connected by partial overlap of the board surfaces, thereby realizing the transfer of current from the first connecting bar 10 to the second connecting bar 20.

[0049] In some embodiments, a plurality of reinforcing columns 30 are provided in the overlapping area of ​​the second connecting row 20 and the first connecting row 10, so that the first connecting row 10 and the second connecting row 20 can be connected by a plurality of bolts 40, thereby achieving connection stability of the first connecting row 10 and the second connecting row 20.

[0050] It is understandable that by setting multiple bolts 40 in the overlapping area of ​​the second connecting row 20 and the first connecting row 10, it is possible to avoid excessive stress concentration in the overlapping area of ​​the first connecting row 10 and the second connecting row 20 due to setting only one bolt 40, so that the stress distribution in the overlapping area is uniform and the deformation of the busbar surface in the overlapping area is avoided due to excessive stress concentration.

[0051] In some embodiments, the second connecting bar 20 is made of a first material, the reinforcing column 30 is made of a second material, and the first connecting bar 10 is made of a second material. Both the second material and the first material are conductive materials.

[0052] It should be noted that both the first and second materials are elemental metals, such as silver, copper, gold, aluminum, and nickel. Considering factors such as cost and conductivity, the electrical connection structures inside a battery pack generally use copper or aluminum. Furthermore, in embodiments not specifically described, the first connection bar 10 is a single plate-like structure made of a single material.

[0053] It is understandable that the two connecting busbars of the electrical connection structure are made of two different materials. Specifically, the first connecting busbar 10 can be made of a material with high structural strength, such as copper, while the second connecting busbar 20 can be made of a lighter material, such as aluminum. A reinforcing post 30 is provided in the lighter second connecting busbar 20. The reinforcing post 30 is made of the same material as the first connecting busbar 10, such as copper, which has high structural strength. Bolts 40 pass through the reinforcing post 30 and the first connecting busbar 10, and are secured to the first connecting busbar 10 and the second connecting busbar 20 with nuts.

[0054] That is, by setting a conductive copper pillar with higher structural strength in the aluminum busbar, the bolt 40 passes through the conductive copper pillar instead of directly passing through the aluminum busbar. Since the reinforcing pillar 30 is made of copper, which has higher structural strength than aluminum, the contact portion between the bolt 40 and the reinforcing pillar 30 will not creep, unlike when the bolt 40 directly passes through the aluminum busbar. This prevents the bolt 40 from twisting out, improves the connection stability of the first connecting busbar 10 and the second connecting busbar 20, and ensures the durability of the electrical connection structure. At the same time, using an aluminum busbar and a copper busbar for connection is lighter than using two copper busbars. In other words, the electrical connection structure of the present invention can balance lightweight design and high structural strength, ensuring the durability of the electrical connection structure.

[0055] Meanwhile, since the reinforcing column 30 uses the same conductive material as the first connecting row 10, it can reduce the situation where galvanic cell reactions easily occur due to the potential difference between different conductive materials, and avoid corrosion at the connection position caused by galvanic cell reactions.

[0056] In some embodiments, the first connecting bar 10 is a copper bar, the connecting bar body 21 of the second connecting bar 20 is made of aluminum, and the reinforcing column 30 is made of copper.

[0057] That is, in this electrical connection structure, while the current of the first connection bar 10 is transmitted through the second connection bar 20 which is in direct contact with the first connection bar 10, the current of the first connection bar 10 is also transmitted to the second connection bar 20 through the reinforcing column 30.

[0058] In some embodiments, the first connecting bar 10 is a copper bar, the second connecting bar of the second connecting bar 20 is made of aluminum, and the first reinforcing column is made of ceramic.

[0059] That is, the copper busbar of the first connecting busbar 10 contacts the aluminum busbar to transmit current.

[0060] In some embodiments, the first connecting bar 10 is also the electrical connecting bar structure in the above embodiments. The first connecting bar structure includes the first connecting bar 10 and the first reinforcing column. The second connecting bar structure includes the second connecting bar 20 and the second reinforcing column. The first connecting bar 10 and the second connecting bar 20 overlap. The first reinforcing column and the second reinforcing column are aligned. The bolt 40 passes through the first reinforcing column and the second reinforcing column and connects the first connecting bar 10 and the second connecting bar 20.

[0061] That is, the first connecting row 10 and the second connecting row 20 are both made of the first material, the first reinforcing column and the second reinforcing column are made of the second material, the first reinforcing column is installed through the first connecting row 10, and the second reinforcing column is installed through the second connecting row 20.

[0062] When the first connecting row 10 is connected to the second connecting row 20, the first reinforcing column and the second reinforcing column are aligned and set, and the bolt 40 passes through the first reinforcing column and the second reinforcing column and cooperates with the nut 50 to connect the first connecting row 10 and the second connecting row 20.

[0063] In some embodiments, the first connecting row 10 and the second connecting row 20 may be made of aluminum, and the first reinforcing column and the second reinforcing column may be made of copper.

[0064] In some embodiments, the thickness of the reinforcing post 30 is the same as the thickness of the second connecting row 20, and the end faces of the reinforcing post 30 are flush with the side faces of the second connecting row 20. That is, by making the thickness of the reinforcing post 30 the same as that of the second connecting row 20, the strength of each connection position of the second connecting row 20 with the bolt 40 in the thickness direction is strengthened.

[0065] In some embodiments, one end of the reinforcing post 30 near the first connecting row 10 protrudes from the side surface of the second connecting row 20 near the first connecting row 10 and is connected to the first connecting row 10, with the first connecting row 10 and the second connecting row 20 overlapping around the reinforcing post.

[0066] It should be noted that the thickness of the reinforcing post 30 is greater than the thickness of the second connecting strip 20, and one end of the reinforcing post 30 is flush with or protrudes from the side of the second connecting strip 20 away from the first connecting strip 10; simultaneously, the end of the reinforcing post 30 closest to the first connecting strip 10 protrudes from the surface of the second connecting strip 20 closest to the first connecting strip 10 and connects to the first connecting strip 10. That is, the reinforcing post 30 connects to the first connecting strip 10 preferentially compared to the second connecting strip 20, avoiding pressure on the second connecting strip 20 and thus protecting the second connecting strip 20. At the same time, the first connecting strip 10 and the second connecting strip 20 overlap around the reinforcing post 30. That is, while the reinforcing post bears part of the pressure applied by the first connecting strip 10, by controlling the height of the reinforcing post 30 protruding from the second connecting strip within a certain range, the first connecting strip 10 and the second connecting strip 20 can still overlap around the reinforcing post 30 by the clamping force, thereby forming a current transmission path.

[0067] In some embodiments, the distance L1 between the end of the reinforcing post 30 near the first connecting row 10 and the side surface of the second connecting row 20 near the first connecting row 10 is 0.2mm-0.4mm.

[0068] It should be noted that the distance between the end of the reinforcing post 30 near the first connecting row 10 and the second connecting row 20 refers to the distance between the end face of the reinforcing post 30 near the end of the first connecting row 10 and one side surface of the second connecting row 20.

[0069] It is understandable that the end of the reinforcing post 30 near the first connecting row 10 protrudes from the second connecting row 20 by 0.2mm-0.4mm. This ensures that the reinforcing post 30 is subjected to the pressure of the first connecting row 10 before the second connecting row 20, and also allows the surface of the first connecting row 10 to contact the second connecting row 20 for electrical conduction after the reinforcing post 30 and the first connecting row 10 come into contact.

[0070] In some embodiments, the distance L1 between the end of the reinforcing post 30 near the first connecting row 10 and the side surface of the second connecting row 20 near the first connecting row 10 is 0.3 mm.

[0071] In some embodiments, the end of the reinforcing post 30 away from the first connecting row 10 protrudes from the second connecting row 20 and is connected to the bolt 40.

[0072] It is understandable that the end of the reinforcing column 30 away from the first connecting row 10 protrudes from the second connecting row 20 and is connected to the bolt 40. That is, the end of the reinforcing column 30 is connected to the bolt 40 before the second connecting row 20, so as to bear the clamping force between the bolt 40 and the nut 50 when the bolt 40 and the nut 50 are tightened, and to avoid the second connecting row 20 being subjected to the clamping force between the bolt 40 and the nut 50.

[0073] In some embodiments, the distance L2 between the end of the reinforcing post 30 away from the first connecting row 10 and the side surface of the second connecting row 20 away from the first connecting row 10 is 0.2mm-0.4mm.

[0074] In some embodiments, the distance between the end of the reinforcing post 30 away from the first connecting row 10 and the side surface of the second connecting row 20 away from the first connecting row 10 is L20.3mm.

[0075] In some embodiments, the distance between the end of the reinforcing post 30 near the first connecting row 10 and the side surface of the second connecting row 20 near the first connecting row 10 is the first distance, and the distance between the end of the reinforcing post 30 away from the first connecting row 10 and the side surface of the second connecting row 20 away from the first connecting row 10 is the second distance, and the first distance and the second distance are equal.

[0076] In some embodiments, the second connecting row 20 is provided with a first through hole, and the reinforcing post 30 is inserted into the first through hole and has an interference fit with the first through hole.

[0077] It is understandable that the outer side of the reinforcing post 30 is in complete contact with the wall of the first through hole on the second connecting row 20, so that the current on the first connecting row 10 can be transmitted from the first connecting row 10 to the second connecting row 20 through direct contact, or it can be transmitted from the first connecting row 10 to the reinforcing post 30, and then from the reinforcing post 30 to the second connecting row 20.

[0078] In some embodiments, the surface of the first connection row 10 is covered with an inert metal plating.

[0079] It is understandable that covering the first connecting bar 10 with an inert metal plating layer can protect the first connecting bar 10 from chemical changes caused by external environmental factors, such as oxidation.

[0080] In some embodiments, the surface of the reinforcing post 30 is covered with an inert metal plating.

[0081] Similarly, the inert metal plating on the surface of the reinforcing column 30 is also to protect the reinforcing column 30 from external environmental factors.

[0082] In some embodiments, the surfaces of the reinforcing column 30 and the first connecting row 10 are both covered with an inert metal plating.

[0083] In some embodiments, the surface of the second connecting row 20 is also covered with an inert metal plating.

[0084] In some embodiments, the inert metal used in the inert metal plating includes, but is not limited to, nickel, tin, or silver.

[0085] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An electrical connection structure, characterized in that, include: The first connecting row structure includes a first connecting row; The second connecting bar structure is an electrical connecting bar structure, which is used to overlap with other conductive bar structures and connect to other conductive bar structures via bolts. It includes a connecting bar body and a reinforcing post. The reinforcing post extends through the connecting bar body along its thickness direction and is connected to the connecting bar body. The reinforcing post has a pre-drilled through hole for connection with the bolt. The mechanical strength of the reinforcing post is higher than that of the connecting bar body, and the thickness of the reinforcing post is greater than or equal to the thickness of the connecting bar body. The reinforcing post can withstand the pressure generated when the bolts and nuts are tightened, replacing the connecting bar body. The second connecting bar structure includes a second connecting bar and a reinforcing post. The second connecting bar is the connecting bar body and overlaps with the first connecting bar. A bolt, which is connected to the through hole and penetrates the first connecting row along the thickness direction of the second connecting row; A nut, which is attached to one end of the bolt and works with the bolt to connect the first connecting row to the second connecting row; The end of the reinforcing column near the first connecting row protrudes from the side surface of the second connecting row near the first connecting row and is connected to the first connecting row, and the first connecting row and the second connecting row overlap around the reinforcing column; The reinforcing post protrudes from the outer periphery of the portion of the second connecting row near the first connecting row and fits into the first connecting row.

2. The electrical connection structure according to claim 1, characterized in that, The second connecting bar is made of the first material, the reinforcing column is made of the second material, and the first connecting bar is made of the second material. Both the second material and the first material are conductive materials.

3. The electrical connection structure according to claim 2, characterized in that, The first material is aluminum, and the second material is copper.

4. The electrical connection structure according to claim 1, characterized in that, The first connecting bar structure is an electrical connecting bar structure. The first connecting bar includes a first connecting bar and a first reinforcing column. The second connecting bar includes a second connecting bar and a second reinforcing column. The first connecting bar and the second connecting bar overlap. The first reinforcing column and the second reinforcing column are aligned. The bolt passes through the first reinforcing column and the second reinforcing column and, together with the nut, connects the first connecting bar and the second connecting bar.

5. The electrical connection structure according to claim 1, characterized in that, The end of the reinforcing column away from the first connecting row protrudes from the second connecting row and is connected to the bolt.

6. The electrical connection structure according to claim 5, characterized in that, The distance between the end of the reinforcing column near the first connecting bar and the surface of the second connecting bar near the first connecting bar is 0.2mm-0.4mm; and / or The distance between the end of the reinforcing column away from the first connecting row and the side surface of the second connecting row away from the first connecting row is 0.2mm-0.4mm.

7. The electrical connection structure according to claim 5, characterized in that, The distance between the end of the reinforcing column near the first connecting row and the side surface of the second connecting row near the first connecting row is the first distance, and the distance between the end of the reinforcing column away from the first connecting row and the side surface of the second connecting row away from the first connecting row is the second distance, and the first distance and the second distance are equal.

8. The electrical connection structure according to claim 1, characterized in that, The surface of the first connecting row is covered with an inert metal layer; And / or, the surface of the second connecting row is covered with an inert metal layer; And / or, the surface of the reinforcing column is covered with an inert metal layer.

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