Composite flexible cable, battery device and electric appliance

Abstract

The utility model discloses a kind of composite soft row, battery device and electrical equipment, composite soft row includes flexible connecting piece, hard connecting piece and adapter, adapter one end and flexible connecting piece electrically connected, adapter other end and hard connecting piece electrically connected.Through setting adapter respectively electrically connected flexible connecting piece and hard connecting piece, need not thin on flexible connecting piece, can promote the strength and electric performance of composite soft row.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a composite soft busbar, battery device and electrical equipment. Background Technology

[0002] With the booming development of new energy vehicles, battery pack technology is also advancing, and the requirements for the materials, performance, assembly tolerances, and costs of the components inside the pack are becoming increasingly stringent. Among these, the copper-aluminum composite flexible busbar is one of the key components for battery electrical connection. Related technologies require the pre-thinning of the flexible copper and aluminum busbars, followed by welding of the thinned areas to form the copper-aluminum composite flexible busbar. However, the thinned areas of the flexible copper busbar lack sufficient strength, affecting the strength and electrical performance of the copper-aluminum composite flexible busbar. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of this invention is to provide a composite flexible busbar. The composite flexible busbar designed according to this invention uses adapters to electrically connect flexible and rigid connectors respectively, eliminating the need for thinning of the flexible connectors and thus improving the strength and electrical performance of the composite flexible busbar.

[0004] This utility model also proposes a battery device having the above-mentioned composite soft packing.

[0005] This utility model also proposes an electrical device having the above-mentioned composite flexible busbar or battery device.

[0006] The composite flexible busbar according to this utility model includes: a flexible connector; a rigid connector; and an adapter, wherein one end of the adapter is electrically connected to the flexible connector, and the other end of the adapter is electrically connected to the rigid connector.

[0007] The composite flexible busbar of this invention provides a conductive connection between a flexible connector and a rigid connector by setting an adapter, which eliminates the need to thin the flexible connector and improves the strength and electrical performance of the composite flexible busbar.

[0008] According to some embodiments of this utility model, the material of the adapter is the same as the material of the flexible connector.

[0009] According to some embodiments of the present invention, the flexible connector includes multiple metal foil layers, the multiple metal foil layers are stacked, and the two ends of the multiple metal foil layers are respectively fixedly connected to form a first connecting portion and a second connecting portion. A deformable portion is formed between the first connecting portion and the second connecting portion. The first connecting portion is electrically connected to the adapter, and the second connecting portion is used to electrically connect to the electrical components of the battery device.

[0010] According to some embodiments of the present invention, the end face of the first connecting part is attached to the end face of the adapter and connected by welding.

[0011] According to some embodiments of the present invention, the second connecting part is provided with a first connecting hole, and the second connecting part is electrically connected to the electrical components of the battery device through the first connecting hole.

[0012] According to some embodiments of the present invention, the rigid connector is provided with a first stepped portion, and the adapter is provided with a second stepped portion. The first stepped portion and the second stepped portion overlap and are connected by welding.

[0013] According to some embodiments of the present invention, the rigid connector is provided with a second connection hole, and the rigid connector is electrically connected to the electrical components of the battery device through the second connection hole. The second connection hole is spaced apart from the first step portion.

[0014] According to some embodiments of this utility model, it further includes an insulating member, which is sleeved on the outer periphery of the adapter and the rigid connector and at least covers the connection between the adapter and the rigid connector; and / or,

[0015] The insulating component is sleeved around the outer periphery of the adapter and the flexible connector and at least covers the connection between the adapter and the flexible connector.

[0016] According to some embodiments of the present invention, along the thickness direction of the flexible connector, the orthographic projection of the insulating member on the flexible connector does not coincide with the deformed portion of the flexible connector.

[0017] According to some embodiments of the present invention, the flexible connector is constructed as a soft copper busbar, the rigid connector is constructed as a hard aluminum busbar, and the adapter is constructed as a hard copper block. The soft copper busbar, the hard copper block, and the hard aluminum busbar are sequentially welded together.

[0018] The battery device according to a second aspect embodiment of the present invention is briefly described below.

[0019] The battery device according to this utility model includes a first electrical component and a second electrical component, as well as the composite flexible busbar described in any of the above embodiments. The rigid connector is electrically connected to the first electrical component, and the flexible connector is electrically connected to the second electrical component. Because the battery device according to this utility model is equipped with the composite flexible busbar of the above embodiments, the battery device has strong current carrying capacity, reliable electrical performance, and the composite flexible busbar can absorb tolerances and vibrations, thus resulting in a long service life.

[0020] According to some embodiments of the present invention, it further includes a housing and a partition, wherein the partition divides the internal space of the housing into at least two accommodating cavities, the first electrical component and the second electrical component are respectively disposed in the two accommodating cavities, and the composite flexible strip passes through the partition.

[0021] The following is a brief description of the electrical equipment according to a third aspect embodiment of the present invention.

[0022] The electrical equipment according to this utility model includes the battery device or the composite flexible busbar as described in any of the above embodiments. Since the electrical equipment according to this utility model is equipped with the battery device or the composite flexible busbar as described in the above embodiments, the electrical equipment has reliable electrical performance and a long service life.

[0023] In summary, the composite flexible busbar of this invention provides a conductive connection between the flexible connector and the rigid connector by setting an adapter, eliminating the need to thin the flexible connector and thus improving the strength and electrical performance of the composite flexible busbar.

[0024] 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

[0025] 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:

[0026] Figure 1 This is a schematic diagram of the composite flexible busbar structure according to an embodiment of the present utility model.

[0027] Figure 2 This is a schematic diagram of the composite flexible busbar structure according to an embodiment of the present utility model.

[0028] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0029] Figure label:

[0030] 1. Composite flexible busbar; 11. Flexible connector; 111. Metal foil layer; 112. First connecting part; 113. Second connecting part; 1131. First connecting hole; 114. Deformable part; 12. Rigid connector; 121. First step part; 122. Second connecting hole; 13. Adapter; 131. Second step part; 14. Insulating part. Detailed Implementation

[0031] 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.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In this invention, unless otherwise explicitly 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 through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes 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. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In related technologies, battery devices utilize copper-aluminum composite flexible busbars, which are key components for electrical connections within the battery device. However, to increase the connection area and current-carrying capacity of dissimilar metals, it is necessary to locally thin the flexible copper and aluminum busbars beforehand, and then weld the thinned areas to form the copper-aluminum composite flexible busbar. This results in insufficient strength in the thinned areas of the flexible copper busbar, potentially causing the copper foil to fray and the connection to become unstable, leading to insufficient current-carrying capacity and affecting the strength and electrical performance of the copper-aluminum composite flexible busbar.

[0037] The following is for reference. Figures 1-3 The composite flexible busbar 1 according to an embodiment of the present invention is described.

[0038] like Figure 2 As shown, the composite flexible busbar 1 according to this utility model includes: a flexible connector 11, a rigid connector 12, and an adapter 13. One end of the adapter 13 is electrically connected to the flexible connector 11, and the other end of the adapter 13 is electrically connected to the rigid connector 12. Specifically, the flexible connector 11 can be formed by stacking metal foil layers 111 and then welding both ends together. After welding, the flexible connector 11 can swing and rotate, and its arbitrary bending and twisting characteristics can improve the quickness and practicality of electrical component installation. The rigid connector 12 can be directly stamped from a metal sheet. The flexible connector 11 and the rigid connector 12 are made of different materials. For example, the flexible connector 11 can be made of copper and the rigid connector 12 can be made of aluminum; or the flexible connector 11 can be made of aluminum and the rigid connector 12 can be made of copper, which can adapt to the conductive connection between different electrical components. By using the flexible connector 11 and the rigid connector 12, the stability of the conductive connection between electrical components can be maintained during installation, while also absorbing the installation tolerances of the electrical components and vibrations during operation, thereby improving the overall stability and safety.

[0039] The adapter 13, serving as a transition between the flexible connector 11 and the rigid connector 12, can be made of a metal with the same or similar material as the flexible connector 11. Welding the adapter 13 to the flexible connector 11 avoids the mismatch in current carrying capacity caused by direct electrical connection of dissimilar metals, and also avoids the need for thinning the flexible connector 11, ensuring the overall strength and current carrying capacity of the composite flexible busbar 1. In another embodiment, the adapter 13 can also be a metal with a different material than the flexible connector 11, such as an alloy terminal. The alloy terminal can be connected to the flexible connector 11 and the rigid connector 12 via a bolt-type design, achieving the same effect. This invention does not limit this, as long as the adapter 13 can electrically connect the flexible connector 11 and the rigid connector 12, ensuring strength and current carrying capacity.

[0040] According to this utility model, the composite flexible busbar 1 is electrically connected to the flexible connector 11 and the rigid connector 12 by setting the adapter 13. This can maintain the stability of the conductive connection between electrical components during installation, and at the same time, there is no need to thin the flexible connector 11, which can improve the overall strength and current carrying capacity of the composite flexible busbar 1.

[0041] According to some embodiments of this utility model, the material of the adapter 13 is the same as that of the flexible connector 11. Specifically, the materials of the adapter 13 and the flexible connector 11 can both be copper, or the materials of the adapter 13 and the flexible connector 11 can both be aluminum. This arrangement can avoid the mismatch of current carrying capacity caused by direct electrical connection of dissimilar metals, and can improve the current carrying capacity of the composite flexible busbar 1.

[0042] In some embodiments, the adapter 13 and the flexible connector 11 can be welded together by friction welding or ultrasonic welding. Welding together by friction welding or ultrasonic welding improves the strength and current carrying capacity of the composite flexible busbar 1.

[0043] According to some embodiments of this utility model, the flexible connector 11 includes multiple metal foil layers 111, which are stacked. The two ends of the multiple metal foil layers 111 are respectively fixedly connected to form a first connecting portion 112 and a second connecting portion 113. A deformable portion 114 is formed between the first connecting portion 112 and the second connecting portion 113. The first connecting portion 112 is electrically connected to the adapter 13, and the second connecting portion 113 is used for electrically connecting to the electrical components of the battery device. Specifically, the two ends of the multiple metal foil layers 111 can be welded together to form a block shape to form the first connecting portion 112 and the second connecting portion 113, while the middle portion of the multiple metal foil layers 111 is in a loose state to form the deformable portion 114. Thus, the flexible connector 11 has a structure with rigid ends and a soft middle, which is simple to manufacture and easy to form.

[0044] In some embodiments, the flexible connector 11 is constructed as a soft copper busbar, which is composed of multiple layers of electrolytic copper foil with a thickness of 0.1-0.3mm. The two ends of the multiple copper foils are welded together by molecular diffusion welding technology, which is simple to manufacture and easy to form.

[0045] In some embodiments, the flexible connector 11 is constructed as a soft aluminum strip, which is composed of multiple layers of aluminum foil sheets or aluminum foil strips. The two ends of the multiple layers of aluminum foil sheets or aluminum foil strips are welded together by ultrasonic welding or laser welding, which is simple to manufacture and easy to form.

[0046] In other embodiments, the flexible connector 11 includes multiple metal wire bundles, which are joined together, and the two ends of the multiple metal wire bundles are fixedly connected by welding or other means to form a first connecting part 112 and a second connecting part 113.

[0047] According to some embodiments of this utility model, the end face of the first connecting part 112 is attached to the end face of the adapter 13 and connected by welding. Specifically, the end face of the first connecting part 112 can be manufactured as a plane, and the end face of the adapter 13 can also be manufactured as a plane. The first connecting part 112 and the adapter 13 are connected by welding with their surfaces in contact, which can increase the contact area, enhance the current carrying capacity, and increase the connection stability. Of course, the end faces of the first connecting part 112 and the adapter 13 can also be manufactured as arc-shaped surfaces, curved surfaces, etc., as long as they can fit together.

[0048] According to some embodiments of the present invention, the end of the first connecting part 112 facing the adapter 13 has a protrusion, which protrudes along the width direction of the first connecting part 112. This can increase the connection area between the first connecting part 112 and the adapter 13, thereby increasing the flow area and flow capacity.

[0049] According to some embodiments of this utility model, the second connecting part 113 is provided with a first connecting hole 1131, and the second connecting part 113 is electrically connected to the electrical components of the battery device through the first connecting hole 1131. Specifically, the first connecting hole 1131 penetrates the second connecting part 113, and the electrical components of the battery device can be riveted to the first connecting hole 1131 by rivets to achieve an electrical connection. The connection method is simple and easy to manufacture.

[0050] According to some embodiments of this utility model, the rigid connector 12 is provided with a first stepped portion 121, and the adapter 13 is provided with a second stepped portion 131. The first stepped portion 121 and the second stepped portion 131 overlap and are connected by welding. Specifically, the first stepped portion 121 is formed by partially thinning the end of the rigid connector 12 near the adapter 13, and the second stepped portion 131 is formed by partially thinning the end of the adapter 13 near the rigid connector 12. Along the thickness direction of the rigid connector 12, the first stepped portion 121 and the second stepped portion 131 overlap and are connected by welding. The provision of the first stepped portion 121 and the second stepped portion 131 increases the connection area between the adapter 13 and the rigid connector 12, thereby enhancing the current carrying capacity of the composite flexible busbar 1 and also enhancing the connection strength between the adapter 13 and the rigid connector 12, thus improving the overall strength of the composite flexible busbar 1. More specifically, the adapter 13 and the rigid connector 12 are fixed by EMPT (electromagnetic pulse welding). The high-speed impact force generated by the electromagnetic pulse is used to achieve cold connection and solid-state welding of the adapter 13 and the rigid connector 12, which has the advantages of no heat-affected zone, high efficiency and environmental protection.

[0051] According to some other embodiments of the present invention, the adapter 13 and the rigid connector 12 can also be connected by end face contact, or the adapter 13 can be provided with a step, and the rigid connector 12 can be directly overlapped on the step and then welded together; or the rigid connector 12 can be provided with a step, and the adapter 13 can be directly overlapped on the step and then welded together.

[0052] According to some embodiments of this utility model, the rigid connector 12 is provided with a second connecting hole 122. The rigid connector 12 is electrically connected to the electrical components of the battery device through the second connecting hole 122. The second connecting hole 122 is spaced apart from the first stepped portion 121. Specifically, the second connecting hole 122 penetrates through the rigid connector 12. The electrical components of the battery device can be riveted to the second connecting hole 122 for conductive connection. The connection method is simple and easy to manufacture. At the same time, the second connecting hole 122 is spaced apart from the first stepped portion 121 to avoid affecting the connection area and connection strength between the rigid connector 12 and the adapter 13.

[0053] According to some embodiments of this utility model, the composite flexible busbar 1 further includes an insulating member 14. The insulating member 14 is sleeved around the outer periphery of the adapter 13 and the rigid connector 12 and at least covers the connection between the adapter 13 and the rigid connector 12. Specifically, the insulating member 14 can wrap around the outer periphery of the adapter 13 and the rigid connector 12 and cover the connection between the adapter 13 and the rigid connector 12. In this way, the insulating member 14 can not only play a role in insulation and protection, but also act as a protective layer, protecting the connection from the influence of the external environment to a certain extent, thereby improving the service life and safety of the composite flexible busbar 1.

[0054] According to some embodiments of this utility model, the insulating member 14 is sleeved on the outer periphery of the adapter 13 and the flexible connector 11 and at least covers the connection between the adapter 13 and the flexible connector 11. Specifically, the insulating member 14 can wrap around the outer periphery of the adapter 13 and the flexible connector 11 and cover the connection between the adapter 13 and the flexible connector 11. In this way, the insulating member 14 can not only play a role in insulation and protection, but also act as a protective layer, protecting the connection from the influence of the external environment to a certain extent, and improving the service life and safety of the composite flexible busbar 1.

[0055] According to some embodiments of this utility model, the insulating component 14 can be made of materials such as ceramic or PPS plastic, which have mature processes and are easy to manufacture. The insulating component 14 can also be a heat-shrink tubing, which is shrunk by heating and fitted onto the outer periphery of the adapter 13 and the rigid connector 12 or the outer periphery of the adapter 13 and the flexible connector 11.

[0056] According to some embodiments of this utility model, along the thickness direction of the flexible connector 11, the orthographic projection of the insulating member 14 on the flexible connector 11 does not coincide with the deformable portion 114 of the flexible connector 11. Specifically, the flexible connector 11 includes multiple metal foil layers 111, which are stacked. The two ends of the multiple metal foil layers 111 are respectively fixedly connected to form a first connecting portion 112 and a second connecting portion 113. A deformable portion 114 is formed between the first connecting portion 112 and the second connecting portion 113. The insulating member 14 extends along the length direction of the composite flexible busbar 1 and extends at most to the edge of the deformable portion 114 of the flexible connector 11, without covering the deformable portion 114 to avoid affecting the bending deformation of the flexible connector 11. That is, the insulating member 14 can be attached to the edge of the deformable portion 114 or spaced apart from the deformable portion 114.

[0057] According to some embodiments of this utility model, the flexible connector 11 is constructed as a soft copper busbar, the rigid connector 12 is constructed as a hard aluminum busbar, and the adapter 13 is constructed as a hard copper block. The soft copper busbar, the hard copper block, and the hard aluminum busbar are welded together in sequence. This design can adapt to some electrical connection requirements of battery devices, while providing a stable connection and strong current carrying capacity.

[0058] The battery device according to this utility model is briefly described below.

[0059] like Figure 1 As shown, the battery device according to this utility model includes a first electrical component and a second electrical component, as well as the composite flexible busbar 1 described in any of the above embodiments. A rigid connector 12 is electrically connected to the first electrical component, and a flexible connector 11 is electrically connected to the second electrical component. Because the battery device according to this utility model is equipped with the composite flexible busbar 1 of the above embodiments, the battery device has strong current handling capacity, reliable electrical performance, and the composite flexible busbar 1 can absorb tolerances and vibrations, thus resulting in a long service life for the battery device.

[0060] In some embodiments, the first electrical component and the second electrical component can be a battery pack or a power distribution component, respectively, or the first electrical component and the second electrical component can be two different battery packs. In this way, when the composite flexible busbar 1 connects the battery pack and the power distribution component, or when the composite flexible busbar 1 connects different battery packs, it can absorb the installation tolerances of the battery pack and the power distribution component, and can also absorb the vibration of the battery pack and the power distribution component during use, thereby improving the installation stability and thus improving the service life of the battery device.

[0061] According to some embodiments of this utility model, the battery device further includes a housing and a partition. The partition divides the internal space of the housing into at least two receiving cavities. The first electrical component and the second electrical component are respectively disposed in the two receiving cavities, and the composite flexible busbar 1 passes through the partition. Specifically, the housing includes a tray, and a crossbeam is provided inside the tray. The crossbeam divides the internal space of the tray into two receiving cavities, and the battery pack and the power distribution assembly can be installed in the receiving cavities respectively. Through holes are provided on the crossbeam, and the composite flexible busbar 1 passes through the through holes to electrically connect the battery pack and the power distribution assembly. This arrangement ensures the stable installation of the battery pack and the power distribution assembly, and the stable conductive connection of the composite flexible busbar 1, further improving the service life of the battery device.

[0062] According to some embodiments of the present invention, the composite flexible busbar 1 further includes an insulating member 14, which is sleeved on the outer periphery of the adapter 13 and the rigid connector 12. The outer periphery of the insulating member 14 is provided with a slot, and the composite flexible busbar 1 is snapped into the inner wall of the through hole through the slot. This can provide insulation protection between the composite flexible busbar 1 and the crossbeam, prevent the rigid connector 12 from contacting the crossbeam and causing leakage current, thus improving the safety of the battery device.

[0063] The electrical equipment according to this utility model is briefly described below.

[0064] The electrical equipment according to this utility model includes the battery device described in any of the above embodiments or the composite flexible busbar 1 described in any of the above embodiments. Therefore, the electrical equipment has reliable electrical performance and a long service life. The electrical equipment can be vehicles, aircraft, computers, ferries, etc., and is not limited thereto.

[0065] In summary, the composite flexible busbar 1 of this utility model can improve the strength and electrical performance of the composite flexible busbar 1 by setting the adapter 13 to electrically connect the flexible connector 11 and the rigid connector 12 respectively without thinning the flexible connector 11.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0067] Although embodiments of the present invention have been shown and described above, variations, modifications, substitutions and alterations can be made to the above embodiments.

Claims

1. A composite flexible busbar (1), characterized in that, For use in battery devices, the composite soft stack (1) comprises: Flexible connector (11); Rigid connector (12); The adapter (13) is electrically connected at one end to the flexible connector (11) and electrically connected at the other end to the rigid connector (12).

2. The composite flexible busbar (1) according to claim 1, characterized in that, The material of the adapter (13) is the same as that of the flexible connector (11).

3. The composite flexible busbar (1) according to claim 1, characterized in that, The flexible connector (11) includes multiple metal foil layers (111), which are stacked. The two ends of the multiple metal foil layers (111) are fixedly connected to form a first connecting part (112) and a second connecting part (113). A deformable part (114) is formed between the first connecting part (112) and the second connecting part (113). The first connecting part (112) is electrically connected to the adapter (13), and the second connecting part (113) is electrically connected to the electrical components of the battery device.

4. The composite flexible busbar (1) according to claim 3, characterized in that, The end face of the first connecting part (112) is attached to the end face of the adapter (13) and connected by welding.

5. The composite flexible busbar (1) according to claim 3, characterized in that, The second connecting part (113) is provided with a first connecting hole (1131), and the second connecting part (113) is electrically connected to the electrical components of the battery device through the first connecting hole (1131).

6. The composite flexible busbar (1) according to claim 1, characterized in that, The rigid connector (12) is provided with a first step portion (121), and the adapter (13) is provided with a second step portion (131). The first step portion (121) and the second step portion (131) overlap and are connected by welding.

7. The composite flexible busbar (1) according to claim 6, characterized in that, The rigid connector (12) is provided with a second connection hole (122). The rigid connector (12) is electrically connected to the electrical components of the battery device through the second connection hole (122). The second connection hole (122) is spaced apart from the first step portion (121).

8. The composite flexible busbar (1) according to any one of claims 1-7, characterized in that, It also includes an insulating element (14) that is fitted around the outer periphery of the adapter (13) and the rigid connector (12) and at least covers the connection between the adapter (13) and the rigid connector (12); and / or, The insulating element (14) is sleeved on the outer periphery of the adapter (13) and the flexible connector (11) and at least covers the connection between the adapter (13) and the flexible connector (11).

9. The composite flexible busbar (1) according to claim 8, characterized in that, Along the thickness direction of the flexible connector (11), the orthographic projection of the insulating member (14) on the flexible connector (11) does not coincide with the deformed portion (114) of the flexible connector (11).

10. The composite flexible busbar (1) according to any one of claims 1-7, characterized in that, The flexible connector (11) is constructed as a soft copper busbar, the rigid connector (12) is constructed as a hard aluminum busbar, and the adapter (13) is constructed as a hard copper block. The soft copper busbar, the hard copper block, and the hard aluminum busbar are welded together in sequence.

11. A battery device, characterized in that, It includes a first electrical component and a second electrical component, and a composite flexible busbar (1) according to any one of claims 1-10, wherein the rigid connector (12) is electrically connected to the first electrical component, and the flexible connector (11) is electrically connected to the second electrical component.

12. The battery device according to claim 11, characterized in that, It also includes a housing and a partition, the partition dividing the internal space of the housing into at least two accommodating cavities, the first electrical component and the second electrical component being respectively disposed in the two accommodating cavities, and the composite flexible busbar (1) passing through the partition.

13. An electrical appliance, characterized in that, Includes the battery device according to claim 11 or 12, or the composite soft pack (1) according to any one of claims 1-10.

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