Connection strip, connection strip assembly, battery pack and electrical device

Abstract

The utility model discloses a kind of connecting row, connecting row assembly, battery pack and electric equipment, connecting row includes: first connecting piece, the first connecting piece is defined with connecting portion;Connecting body, the connecting body is located at the connecting portion, wherein, the tensile strength of the connecting body is greater than the tensile strength of the connecting portion, the connecting body is integrally formed with the connecting portion. According to the connecting row of the utility model embodiment, by setting connecting body on connecting portion, and the tensile strength of connecting body is greater than the tensile strength of connecting portion, so as to improve the structural strength at connecting portion, integrally formed improves the reliability of connecting body and connecting portion connection, connecting row is convenient to manufacture, manufacturing cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a connector, a connector assembly, a battery pack, and an electrical device. Background Technology

[0002] The battery pack contains high-voltage aluminum busbars, connecting aluminum busbars, connecting plates, and other connecting busbars. These connecting busbars connect to the terminals of the power distribution module. Most of the terminals of the power distribution module are copper terminals. The aluminum connecting busbars have low strength and are difficult to connect directly to the copper terminals. Usually, an adapter structure is required. In related technologies, the aluminum busbars and adapter structures mostly use electromagnetic pulse welding technology. This process is cumbersome and inefficient, and there is room for improvement. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a connecting strip that is easy to manufacture and can reduce manufacturing costs.

[0004] The connecting strip according to an embodiment of the present utility model includes: a first connecting member, the first connecting member defining a connecting portion; a connecting body, the connecting body being disposed on the connecting portion, wherein the tensile strength of the connecting body is greater than the tensile strength of the connecting portion, and the connecting body and the connecting portion are integrally formed.

[0005] According to the embodiments of the present invention, the connecting strip has a connecting body on the connecting part, and the tensile strength of the connecting body is greater than that of the connecting part, thereby improving the structural strength of the connecting part. At the same time, the integral molding improves the reliability of the connection between the connecting body and the connecting part. The connecting strip is easy to manufacture and can reduce manufacturing costs. In addition, the connecting body with the connecting part can be directly connected to other connecting parts, eliminating the need for traditional adapter structures, thereby eliminating the welding process for connecting the first connecting part and the adapter structure, simplifying the manufacturing process and improving assembly efficiency.

[0006] In some embodiments, the connector and the connecting part are integrally cast and rolled, or the connector and the connecting part are formed by a composite process.

[0007] In some embodiments, the connecting part is made of aluminum and the connecting body is made of copper.

[0008] In some embodiments, the connecting portion has an avoidance groove, the connecting body is disposed in the avoidance groove and the outer surface of the connecting body is flush with the outer surface of the connecting portion.

[0009] In some embodiments, the maximum thickness of the connector is H1, the thickness of the connecting part is H2, the thickness of the connecting part is H1, and the thickness of the connector is H2, where 1 / 10H1 < H2 < H1.

[0010] In some embodiments, the connector includes a first layer and a second layer arranged along the thickness direction of the connector, the second layer being closer to the bottom of the relief groove relative to the first layer, the second layer including a plurality of spaced protrusions, and the bottom of the relief groove having a mating groove for the protrusions to engage.

[0011] In some embodiments, the thickness of the first layer is H3, the thickness of the second layer is H4, and H4 ≤ 1 / 2H3.

[0012] In some embodiments, the thickness of the connecting portion is H1, where 1mm ≤ H1 ≤ 10mm.

[0013] In some embodiments, the connecting portion has a through clearance hole, and the connecting body is disposed in the clearance hole.

[0014] In some embodiments, at least a portion of the edges of the connector are formed in an arc shape.

[0015] In some embodiments, the connector includes a first connecting segment and a second connecting segment, wherein the first connecting segment is square, the second connecting segment is connected to one side of the first connecting segment, and the outer edge of the second connecting segment is arc-shaped.

[0016] In some embodiments, the width of the first connecting segment is L1 in the width direction of the first connector, and the maximum length of the second connecting segment is L2 in the direction away from the first connecting segment, where L2 ≤ 1 / 2L1.

[0017] In some embodiments, the connector is cylindrical.

[0018] In some embodiments, the connecting portion is located at one end of the first connector in its length direction, and the connecting body is arranged at a distance from the edge of the connecting portion in the width direction of the first connector.

[0019] In some embodiments, the connector is provided with a through hole for fasteners to pass through, or the connector and the connector are provided with through holes for fasteners to pass through.

[0020] In some embodiments, the connecting bar further includes an insulating member that covers at least a portion of the first connector and exposes an end of the first connector, wherein the exposed portion of the first connector is the connecting portion.

[0021] The present invention also proposes a connecting bar assembly, including a connecting bar according to an embodiment of the present invention.

[0022] In some embodiments, a second connector is further included, which is arranged opposite to the connecting portion and is connected to the connecting body.

[0023] In some embodiments, the connector has a first through hole, the second connector has a second through hole, and the second connector is connected to the connector by a fastener passing through the first through hole and the second through hole.

[0024] The present invention also proposes a battery pack, including a connecting bar according to an embodiment of the present invention or a connecting bar assembly according to an embodiment of the present invention.

[0025] This utility model also proposes an electrical device, including a battery pack according to an embodiment of this utility model.

[0026] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is a schematic diagram of a connecting row according to some embodiments of the present utility model;

[0029] Figure 2 This is a partial schematic diagram of the connecting row according to some embodiments of the present utility model;

[0030] Figure 3 It is along Figure 2 Sectional view of line AA in the middle;

[0031] Figure 4 This is a schematic diagram of a connecting strip assembly according to some embodiments of the present utility model;

[0032] Figure 5 This is a schematic diagram of a connecting row according to other embodiments of the present invention;

[0033] Figure 6 This is a partial schematic diagram of the connecting row according to other embodiments of the present invention;

[0034] Figure 7 These are some examples along Figure 6 Sectional view of the middle BB line;

[0035] Figure 8 In other examples along Figure 6 Sectional view of the middle BB line;

[0036] Figure 9 In some other examples along Figure 6 Sectional view of the middle BB line;

[0037] Figure 10 This is a schematic diagram of a connecting strip assembly according to some embodiments of the present utility model;

[0038] Figure 11 This is a schematic diagram of an electrical device according to some embodiments of the present utility model.

[0039] Figure label:

[0040] Connector strip 100, connector strip assembly 200, battery pack 300, electrical equipment 400.

[0041] First connector 10, connecting part 11, clearance groove 111, clearance hole 112, insulating part 12.

[0042] Connector 20, first layer 201, second layer 202, first connecting segment 21, second connecting segment 22, first through hole 23.

[0043] Second connector 30,

[0044] Fastener 40. Detailed Implementation

[0045] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0046] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] The following is for reference. Figures 1-11 The present invention describes a connecting bar 100 and a connecting bar assembly 200 according to an embodiment of the present invention, wherein the connecting bar assembly 200 includes the connecting bar 100.

[0049] like Figures 1-10 As shown, according to an embodiment of the present invention, a connecting row 100 includes a first connecting member 10 and a connecting body 20. The first connecting member 10 defines a connecting portion 11, and the connecting body 20 is disposed on the connecting portion 11. The tensile strength of the connecting body 20 is greater than the tensile strength of the connecting portion 11, and the connecting body 20 and the connecting portion 11 are integrally formed.

[0050] In other words, the connecting body 20 is integrally formed on the connecting part 11 of the first connecting member 10, and the connecting body 20 has relatively high tensile strength. This not only improves the structural strength of the connecting part 11, but also simplifies the assembly process of the connecting body 20 and the connecting part 11, eliminating the need for welding and avoiding the reduction in the performance of the connecting strip 100 caused by welding. This makes the connecting strip 100 easier to manufacture and can reduce manufacturing costs. At the same time, the integral forming method can also improve the reliability of the connection between the connecting body 20 and the connecting part 11.

[0051] According to the embodiment of the present utility model, the connecting strip 100 has a connecting body 20 on the connecting part 11, and the tensile strength of the connecting body 20 is greater than that of the connecting part 11, thereby improving the structural strength of the connecting part 11. At the same time, the integral molding improves the reliability of the connection between the connecting body 20 and the connecting part 11. The connecting strip 100 is easy to manufacture and can reduce manufacturing costs.

[0052] Furthermore, the connector 11 with the connecting part 20 can be directly connected to other connectors (such as...). Figure 4 (As shown, it is directly connected to the second connector 30 via fastener 40), eliminating the need for traditional adapter structures, thereby eliminating the welding process for connecting the first connector and the adapter structure, simplifying the manufacturing process, and improving assembly efficiency.

[0053] In some embodiments, the connector 20 and the connector 11 are formed using a composite process. The composite process is to combine two materials with different properties together by physical or chemical methods to form a composite material with specific properties. The composite process can avoid defects such as welding spatter, pores, cracks and metal foreign objects, reduce the short circuit rate of the connector 100, and improve the yield of the connector 20 and the connector 11, thereby improving the performance of the connector 100 and enabling the connector 100 to effectively realize the electrical connection between the battery and the power distribution module.

[0054] In some embodiments, the connector 20 and the connecting portion 11 are integrally cast and rolled. This integral casting and rolling process allows for more precise control of material usage, improves material utilization, and increases product yield. By integrally casting the connector 20 onto the connecting portion 11, the connecting portion 11 is strengthened, meeting the manufacturing requirements for lightweight and high performance. Compared to traditional welding and riveting methods, the casting and rolling process is smaller and requires less equipment, thus improving production efficiency, saving manufacturing space, and reducing manufacturing costs.

[0055] Of course, the connector 20 and the connector 11 can also be integrally formed using other processes, such as continuous casting, integral die casting, etc.

[0056] In some embodiments, the connecting part 11 is made of aluminum and the connecting body 20 is made of copper. By setting copper on the aluminum, an aluminum connecting busbar integrated with copper is formed. Copper has a higher tensile strength than aluminum. The local composite of copper at the connection point of the aluminum busbar can effectively improve the connection strength at the connection point. The copper and aluminum are integrally cast and rolled to improve the reliability of the connection. Moreover, since copper has a lower resistivity than aluminum, it can carry a larger current, thereby reducing the possibility of local overcurrent. Under the same size and length, the resistance of copper conductor is smaller, thereby generating less heat when transmitting the same current. Therefore, the aluminum connecting busbar integrated with copper is beneficial to reduce the temperature rise during local overcurrent and reduce the risk of thermal runaway. In addition, the copper-aluminum composite is also beneficial to reduce the weight of the connecting busbar and improve the performance of the connecting busbar 100. This connecting busbar can be used as a high-voltage aluminum busbar, connecting aluminum busbar, or connecting piece in the battery pack 300 to meet the design requirements of lightweight and high performance of the battery pack 300.

[0057] In some specific examples, the forming process of the connecting strip 100 includes: casting and rolling composite according to the design requirements of the connecting strip 100; after composite, preforming is performed, and then heat-insulating and insulating materials such as mica and plastic are wrapped around the outer periphery of the first connecting member 10.

[0058] like Figure 3 , Figure 7 and Figure 9As shown, in some embodiments, the connecting portion 11 has an avoidance groove 111, the connecting body 20 is disposed in the avoidance groove 111, and the outer surface of the connecting body 20 is flush with the outer surface of the connecting portion 11. By disposing the connecting body 20 in the avoidance groove 111 of the connecting portion 11, the connecting body 20 does not protrude from the connecting portion 11, so that the formed connecting row 100 has a simple structure, and on the basis of meeting the performance requirements, it realizes light weight and cost reduction design.

[0059] As Figure 3 shown, in some embodiments, the maximum thickness of the connecting portion 11 is H1, and the thickness of the connecting body 20 is H2. The thickness direction here is the up and down direction as Figure 3 shown. Among them, if the thickness of the connecting body 20 is too small, the effect of the connecting body 20 on improving the structural strength is limited, and there is still a situation where the temperature rise during local overcurrent is too high. If the thickness of the connecting body 20 is too large, it will affect the cost and light weight, and at the same time, it is not conducive to the integral molding of the connecting body 20 in the avoidance groove 111. Therefore, the thickness of the connecting body 20 is limited to: 1 / 10H1 < H2 < H1. This can not only improve the structural strength at the connecting portion 11, but also help reduce the temperature rise during local overcurrent, and at the same time facilitate the integral molding of the two, reduce the manufacturing cost, and meet the design requirements of light weight.

[0060] In some examples, H2 ≤ 1 / 2H1. Thus, when using integral casting and rolling, the stability of the manufacturing process can be improved, and it is convenient to realize casting and rolling compounding.

[0061] As Figure 9 shown, in some embodiments, the connecting body 20 includes a first layer 201 and a second layer 202. The first layer 201 and the second layer 202 are arranged along the thickness direction of the connecting body 20. The second layer 202 is closer to the bottom of the avoidance groove 111 than the first layer 201. The second layer 202 includes a plurality of spaced convex teeth, and the bottom of the avoidance groove 111 has a mating groove for the convex teeth. This improves the roughening degree of the bonding surface between the connecting body 20 and the connecting portion 11, increases the bonding surface area, and further improves the bonding strength between the two. Among them, the shape of the convex teeth here can be triangular, square, semicircular, etc.

[0062] As Figure 9 shown, in some embodiments, the thickness of the first layer 201 is H3, and the thickness of the second layer 202 is H4. Among them, if the height of the convex teeth is too large, it is difficult to form in the process, and the manufacturing cost is high. Therefore, it is limited that: H4 ≤ 1 / 2H3. By limiting H4 within the above range, it is convenient for the integral molding of the connecting body 20.

[0063] In some embodiments, the thickness of the connecting part 11 is H1. If the thickness of the connecting part 11 is too small, it is difficult to meet the performance requirements of the connecting strip 100. If the thickness of the connecting part 11 is too large, it will increase the cost and weight. Therefore, the thickness of the connecting part 11 can be limited to: 1mm≤H1≤10mm. H1 can be any value of 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm and any value between any two. This is beneficial to the lightweighting and cost reduction of the connecting strip 100 while meeting the performance requirements of the connecting strip 100.

[0064] like Figure 8 As shown, in some embodiments, the connecting part 11 has a through clearance hole 112, and the connecting body 20 is disposed in the clearance hole 112. By disposing the connecting body 20 in the clearance hole 112 of the connecting part 11, the connecting body 20 will not protrude from the connecting part 11, making the structure of the formed connecting row 100 simple, and achieving a lightweight and cost-reducing design while meeting performance requirements.

[0065] like Figure 2 and Figure 6 As shown, in some embodiments, at least a portion of the edge of the connector 20 is formed as an arc shape, thereby increasing the surface area of ​​the joint surface between the connector 20 and the connecting portion 11, improving the joint strength between the two, and reducing the probability of the joint failure.

[0066] like Figure 2 As shown, in some embodiments, the connector 20 includes a first connecting segment 21 and a second connecting segment 22. The first connecting segment 21 is square, and the second connecting segment 22 is connected to one side of the first connecting segment 21. The outer edge of the second connecting segment 22 is arc-shaped. By designing the connector 20 as a combined structure, the strength of the connection between the connector 20 and the connecting part 11 can be increased, and the size of the connector 20 can be increased, reducing the possibility of local overcurrent, reducing the temperature rise during local overcurrent, and reducing the risk of thermal runaway.

[0067] like Figure 2 As shown, in some embodiments, in the width direction of the first connector 10 (e.g.) Figure 2 In the left-right direction (as shown), the width of the first connecting segment 21 is L1, and in the direction away from the first connecting segment 21 (such as... Figure 2 In the front-back direction shown, the maximum length of the second connecting segment 22 is L2, L2≤1 / 2L1. This improves the strength of the connection between the connecting body 20 and the connecting part 11, avoids excessive increase in process cost, and allows the formed first connecting part 10 to have better performance.

[0068] like Figure 6As shown, in some embodiments, the connector 20 is cylindrical, which increases the surface area of ​​the entire outer periphery of the connector 20 and the mating surface of the connecting part 11, thereby improving the bonding strength between the two and reducing the probability of the joint breaking and failing.

[0069] like Figure 2 and Figure 6 As shown, in some examples, the connecting portion 11 is located on the first connecting member 10 in its length direction (e.g., Figure 2 One end of the first connector 10 in the front-back direction (as shown) is in the width direction (e.g., in the front-back direction). Figure 2 In the left-right direction shown, the edges of the connector 20 and the connector 11 are arranged at intervals, as shown. Figure 2 As shown, the width of the first connecting segment 21 is L1, and the width of the connecting part 11 is L, where L1 < L. Figure 6 As shown, the connector 20 is circular with an outer diameter of D, and the width of the connector 11 is L, where D < L. This avoids excessive cost and also helps to meet the lightweight design of the connector 100.

[0070] In some embodiments, the connector 20 is provided with a through hole for fasteners 40 to pass through. After the fasteners 40 pass through the connector 20, the connector 100 can be connected to other structural components without the need for traditional welding. It is only necessary to use fasteners 40 or other methods to connect at the connection point, which can ensure the strength and service life of the connection point. At the same time, there are no defects such as welding spatter, porosity, cracks and metal foreign objects in the entire process, which improves the overall assembly qualification rate and reduces costs.

[0071] In some embodiments, the connector 20 is provided with a first through hole and the connector 11 is provided with a third through hole. The first through hole and the third through hole are connected to each other for fasteners 40 to pass through, thereby connecting the connector 100 to other structural components. Traditional welding is not required; fasteners 40 are used at the connection point. This ensures the strength and service life of the connection point. At the same time, there are no defects such as welding spatter, porosity, cracks, and metal foreign objects in the entire process, which improves the overall assembly qualification rate and reduces costs.

[0072] In some embodiments, the connecting bar 100 further includes an insulating member 12, which covers at least a portion of the first connector 10 and exposes the end of the first connector 10, wherein the exposed portion of the first connector 10 is a connecting portion 11, that is, the connecting portion 11 is not covered by the insulating member 12, so that the first connector 10 and other components can effectively form an electrical connection.

[0073] According to the embodiment of the present utility model, the connecting strip assembly 200 improves the structural strength of the connecting part 11 by adopting the above-mentioned connecting strip 100, improves the reliability of the connection between the connecting body 20 and the connecting part 11, thereby improving the performance of the connecting strip 100. Moreover, the connecting strip 100 is easy to manufacture and can reduce manufacturing costs.

[0074] like Figure 4 and Figure 10 As shown, in some embodiments, the connecting assembly 200 further includes a second connector 30, which is arranged opposite to the connecting part 11. The second connector 30 is connected to the connecting body 20, and the connecting body 20 has relatively high tensile strength. By connecting the second connector 30 to the connecting body 20, the stability and reliability of the connection between the second connector 30 and the first connector 10 can be improved.

[0075] like Figure 4 and Figure 10 As shown, in some embodiments, the connector 20 is provided with a first through hole 23, and the second connector 30 is provided with a second through hole. The second connector 30 is connected to the connector 20 by a fastener 40 passing through the first through hole 23 and the second through hole. In addition, in some examples, when the connector 20 is provided in the relief groove 111 of the connector 11, a third through hole is provided on the relief groove 111. That is, the fastener 40 passes through the first through hole, the third through hole and the second through hole in sequence, thereby connecting the connector 100 and the second connector 30. The fastener 40 can be a screw or a bolt.

[0076] The second connector 30 can be a copper busbar. Therefore, when the copper busbar is connected to the connecting busbar 100, there is no need for traditional welding. Only screws / bolts are needed at the connection point. This can ensure the strength and service life of the connection point. At the same time, there are no defects such as welding spatter, porosity, cracks and metal foreign objects in the entire process, which improves the overall assembly qualification rate and reduces costs.

[0077] The battery pack 300 according to an embodiment of the present invention includes a connecting bar 100 according to an embodiment of the present invention or a connecting bar assembly 200 according to an embodiment of the present invention. By using the connecting bar 100, the connecting bar 100 has high structural strength, and the battery pack 300 can be connected by fasteners 40, which reduces defects such as spatter, pores, cracks and metal foreign objects caused by welding, reduces the risk of short circuit of the battery in the pack, improves the pass rate of the battery pack 300, and improves the reliability of the battery pack 300.

[0078] The electrical device 400 of this embodiment includes a battery pack 300 according to this embodiment. The electrical device 400 can be a vehicle, which can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle is equipped with the battery pack 300, which can be located at the bottom, front, or rear of the vehicle. The battery pack 300 can be used to power the vehicle; for example, the battery pack 300 can serve as the vehicle's operating power source.

[0079] Electrical equipment 400 can also include, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc.

[0080] Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose special limitations on the above-mentioned electrical devices.

[0081] Other configurations and operations of the electrical equipment 400 according to embodiments of this utility model are known to those skilled in the art and will not be described in detail here. The vertical, horizontal, and front-back directions are defined as shown in the figures.

[0082] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features not in direct contact but through another feature between them. Moreover, "above," "over," and "on top" of the second feature include the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0084] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A connecting bar, characterized in that, include: A first connector, wherein the first connector defines a connecting portion; A connector, wherein the connector is disposed at the connecting portion. Wherein, the tensile strength of the connector is greater than the tensile strength of the connector portion, and the connector and the connector portion are integrally formed.

2. The connecting bar according to claim 1, characterized in that, The connector and the connecting part are integrally cast and rolled; or, the connector and the connecting part are formed by a composite process.

3. The connecting bar according to claim 1, characterized in that, The connecting part is made of aluminum, and the connecting body is made of copper.

4. The connecting bar according to claim 1, characterized in that, The connecting part has a clearance groove, the connecting body is disposed in the clearance groove and the outer surface of the connecting body is flush with the outer surface of the connecting part.

5. The connecting bar according to claim 4, characterized in that, The maximum thickness of the connecting part is H1, and the thickness of the connecting body is H2, where 1 / 10H1 < H2 < H1.

6. The connecting bar according to claim 4, characterized in that, The connector includes a first layer and a second layer arranged along the thickness direction of the connector. The second layer is closer to the bottom of the relief groove than the first layer. The second layer includes a plurality of spaced-apart protrusions. The bottom of the relief groove has a mating groove for the protrusions to engage.

7. The connecting bar according to claim 6, characterized in that, The thickness of the first layer is H3, and the thickness of the second layer is H4, where H4 ≤ 1 / 2H3.

8. The connecting bar according to claim 1, characterized in that, The thickness of the connecting part is H2, where 1mm ≤ H2 ≤ 10mm.

9. The connecting bar according to claim 1, characterized in that, The connecting part has a through clearance hole, and the connecting body is disposed in the clearance hole.

10. The connecting bar according to any one of claims 1-9, characterized in that, At least a portion of the edges of the connector are formed in an arc shape.

11. The connecting bar according to claim 10, characterized in that, The connector includes a first connecting segment and a second connecting segment. The first connecting segment is square, and the second connecting segment is connected to one side of the first connecting segment, with the outer edge of the second connecting segment being arc-shaped.

12. The connecting bar according to claim 11, characterized in that, In the width direction of the first connector, the width of the first connecting segment is L1, and in the direction away from the first connecting segment, the maximum length of the second connecting segment is L2, where L2≤1 / 2L1.

13. The connecting bar according to claim 10, characterized in that, The connector is cylindrical.

14. The connecting bar according to claim 10, characterized in that, The connecting portion is located at one end of the first connector in its length direction, and the connecting body and the edge of the connecting portion are arranged at intervals in the width direction of the first connector.

15. The connecting bar according to claim 1, characterized in that, The connector is provided with a through hole for fasteners to pass through, or the connecting part and the connector are provided with a through hole for fasteners to pass through.

16. The connecting bar according to claim 1, characterized in that, The connecting bar also includes an insulating member that covers at least a portion of the first connecting member and exposes the end of the first connecting member, wherein the exposed portion of the first connecting member is the connecting part.

17. A connecting strip assembly, characterized in that, Includes the connecting row according to any one of claims 1-16.

18. The connecting strip assembly according to claim 17, characterized in that, It also includes a second connector, which is arranged opposite to the connecting portion and is connected to the connecting body.

19. A battery pack, characterized in that, Includes a connecting bar according to any one of claims 1-16 or a connecting bar assembly according to any one of claims 17-18.

20. An electrical appliance, characterized in that, Includes the battery pack according to claim 19.

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