Battery device, electric device, and communication pipe structure

Abstract

The utility model discloses a battery device, a power utilization device and a communicating pipe structure, and relates to the technical field of batteries, the battery device comprises the communicating pipe structure, the communicating pipe structure comprises an outer layer pipe and an inner layer pipe, the outer layer pipe sleeves the outer side of the inner layer pipe, the inner surface of the outer layer pipe is bonded with the outer surface of the inner layer pipe, and the outer layer pipe is connected with the outer surface of the inner layer pipe; the outer-layer pipe is provided with a first fixing part, the inner-layer pipe is provided with a second fixing part, the first fixing part and the second fixing part are assembled in a matched mode to position the relative position of the outer-layer pipe and the inner-layer pipe, the first fixing part comprises one of a fixing hole and a fixing boss, and the second fixing part comprises one of a fixing hole and a fixing boss. The second fixing part comprises the other one of the fixing hole and the fixing boss, the fixing hole and the fixing boss are correspondingly arranged, and the fixing boss is assembled in the fixing hole. According to the battery device provided by the embodiment of the invention, the integrity and the reliability of the connecting pipe structure are good, and the reliability of the battery device can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular, to a battery device, a battery device having the battery device, and a connecting pipe structure for the battery device. Background Art

[0002] In the related art, the existing connecting pipe structure can be a double-layer pipe, and the inner and outer layers of the double-layer pipe can be bonded through the performance of the materials used. Due to the difference in material consistency and the instability of the process, the inner and outer layers of the double-layer pipe may be poorly bonded, resulting in poor reliability of the connecting pipe structure and low reliability of the battery device. Summary of the Utility Model

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present application is to provide a battery device, in which the integrity and reliability of the connecting pipe structure are good, and the reliability of the battery device can be improved.

[0004] In a first aspect, an embodiment of the present application provides a battery device, including: a connecting pipe structure, the connecting pipe structure includes an outer layer pipe and an inner layer pipe, the outer layer pipe is sleeved outside the inner layer pipe, the inner surface of the outer layer pipe and the outer surface of the inner layer pipe are bonded, the outer layer pipe has a first fixing portion, the inner layer pipe has a second fixing portion, the first fixing portion and the second fixing portion are cooperatively assembled to position the relative positions of the outer layer pipe and the inner layer pipe, the first fixing portion includes one of a fixing hole and a fixing boss, the second fixing portion includes the other of the fixing hole and the fixing boss, the fixing hole and the fixing boss are correspondingly arranged, and the fixing boss is assembled into the fixing hole.

[0005] In the above technical solution, the outer layer pipe and the inner layer pipe can be bonded and connected. The first fixing portion is configured as one of a fixing hole and a fixing boss, the second fixing portion is configured as the other of the fixing hole and the fixing boss, and the first fixing portion and the second fixing portion are cooperatively assembled, which can reduce the risk of relative position change between the outer layer pipe and the inner layer pipe, reduce the probability of the inner layer pipe moving relative to the outer layer pipe, improve the connection strength between the outer layer pipe and the inner layer pipe, enable the outer layer pipe and the inner layer pipe to be better combined, is beneficial to improving the integrity and reliability of the connecting pipe structure, makes the integrity and reliability of the connecting pipe structure good, and can improve the reliability of the battery device.

[0006] In some embodiments, both the fixing hole and the fixing boss are multiple, and the multiple fixing holes and the multiple fixing bosses correspond to each other one by one.

[0007] In the above technical solution, by providing that both the fixing hole and the fixing boss are multiple, the relative positions of the outer layer pipe and the inner layer pipe can be further defined, the connection strength between the outer layer pipe and the inner layer pipe can be further improved, and the probability of separation between the outer layer pipe and the inner layer pipe can be further reduced.

[0008] In some embodiments, a plurality of fixing holes form at least one group of fixing hole groups, each group of fixing hole groups includes a plurality of fixing holes, and the plurality of fixing holes in each group of fixing hole groups are arranged along the circumference of the connecting tube structure; a plurality of fixing bosses form at least one group of fixing boss groups, each group of fixing boss groups includes a plurality of fixing bosses, and the plurality of fixing bosses in each group of fixing boss groups are arranged along the circumference of the connecting tube structure.

[0009] In the above technical scheme, the multiple fixing holes in each group of fixing holes can be arranged along the circumference of the connecting tube structure, the multiple fixing bosses in each group of fixing bosses can be arranged along the circumference of the connecting tube structure, and the multiple fixing holes and corresponding fixing bosses can be assembled one by one along the circumference of the connecting tube structure, so as to realize the positioning and matching of the inner tube and the outer tube in the circumference of the connecting tube structure, which is more conducive to improving the stability and reliability of the connecting tube structure.

[0010] In some embodiments, multiple fixing holes form multiple fixing hole groups, multiple fixing bosses form multiple fixing boss groups, multiple fixing hole groups are arranged axially along the connecting tube structure, and multiple fixing boss groups are arranged axially along the connecting tube structure.

[0011] In the above technical solution, multiple groups of fixing holes and multiple groups of fixing bosses can be arranged one by one along the axial direction of the connecting pipe structure, which can realize the axial positioning and matching of the inner layer tube and the outer layer tube of the connecting pipe structure, and is more conducive to improving the stability and reliability of the connecting pipe structure.

[0012] In some embodiments, the shape of the fixing hole and the shape of the fixing boss are adapted to each other.

[0013] In the above technical solution, the shape of the fixing hole and the shape of the fixing boss are adapted to make the outer tube and the inner tube tightly connected, which can further improve the integrity of the connecting tube structure, further reduce the probability of separation of the outer tube and the inner tube, and further improve the reliability of the connecting tube structure.

[0014] In some embodiments, the outer tube is formed with a fixing hole, and the outer surface of the inner tube is formed with a fixing boss protruding toward the outer tube, and the cross-sectional areas of the fixing hole and the fixing boss gradually decrease from the outer tube to the inner tube.

[0015] In the above technical solution, a fixing hole is formed on the outer tube, and a fixing boss is formed on the inner tube. The fixing boss and the fixing hole are assembled together, so that the outer tube can fit tightly with the inner tube. The outer tube and the inner tube are well combined, which is more conducive to improving the integrity of the connecting tube structure and further reducing the risk of separation of the outer tube and the inner tube.

[0016] In some embodiments, the battery device further includes: a connecting portion, the connecting portion is located on a side of the outer tube away from the inner tube, the connecting portion connects at least two fixing bosses, and the connecting portion abuts against an outer surface of the outer tube.

[0017] In the above technical solution, the connecting portion is connected and fixed to the convex platform from the side of the outer tube facing away from the inner tube, which can achieve the effect of further defining the relative positions of the outer tube and the inner tube, and can further improve the stability of the connecting tube structure.

[0018] In some embodiments, the inner tube is formed with fixing holes, and the inner surface of the outer tube is formed with fixing convex platforms protruding towards the inner tube. From the direction of the outer tube to the inner tube, the cross-sectional areas of both the fixing holes and the fixing convex platforms gradually increase.

[0019] In the above technical solution, the inner tube is formed with fixing holes, and the outer tube is formed with fixing convex platforms. The fixing convex platforms and the fixing holes are fitted and assembled, so that the outer tube can be closely attached to the inner tube, and the outer tube and the inner tube are well combined, which is more conducive to improving the integrity of the connecting tube structure and further reducing the risk of separation between the outer tube and the inner tube.

[0020] In some embodiments, the battery device further includes: a connecting portion located inside the inner tube, the connecting portion connecting at least two fixing convex platforms and abutting against the inner surface of the inner tube.

[0021] In the above technical solution, the connecting portion connects the fixing convex platforms from inside the inner tube, which can achieve the effect of further defining the relative positions of the outer tube and the inner tube, and can further improve the stability of the connecting tube structure.

[0022] In some embodiments, along the axial direction of the communicating tube structure, one of a fixing edge and a covering flange is formed at the end of the outer tube, and the other of the fixing edge and the covering flange is formed at the end of the inner tube. The covering flange covers the fixing edge. The first fixing portion further includes one of the fixing edge and the covering flange, and the second fixing portion further includes the other of the fixing edge and the covering flange.

[0023] In the above technical solution, by providing the covering flange and the fixing edge, the relative positions of the outer tube and the inner tube can be further fixed, the connection strength between the outer tube and the inner tube can be further enhanced, which is more conducive to enhancing the tightness of the connection between the outer tube and the inner tube, and is more conducive to improving the integrity of the connecting tube structure.

[0024] In some embodiments, the battery device further includes: a box body, a plurality of heat exchange structures and a plurality of battery cells. The communicating tube structure, the plurality of heat exchange structures and the plurality of battery cells are all arranged inside the box body. The heat exchange structures are in heat exchange cooperation with the corresponding battery cells, and at least two heat exchange structures are communicated through the communicating tube structure.

[0025] In the above technical solution, at least two heat exchange structures are connected through a connecting pipe structure. A heat exchange medium can flow in the heat exchange structures, and the heat exchange medium can flow between the interconnected heat exchange structures, so that the heat distribution on the battery device can be made uniform, which is beneficial to improving the heat dissipation performance of the battery device, making the temperature of the battery device balanced and uniform, and is beneficial to improving the stability of the battery device.

[0026] In a second aspect, an electric device provided by an embodiment of the present application further includes the battery device of the above embodiment.

[0027] In the above technical solution, the reliability of the electric device can be improved.

[0028] In a third aspect, an embodiment of the present application further provides a connecting pipe structure, including: an outer pipe and an inner pipe. The outer pipe is sleeved outside the inner pipe, the inner surface of the outer pipe and the outer surface of the inner pipe are bonded, the outer pipe has a first fixing portion, the inner pipe has a second fixing portion, and the first fixing portion and the second fixing portion are cooperatively assembled to position the relative positions of the outer pipe and the inner pipe. The first fixing portion includes one of a fixing hole and a fixing boss, the second fixing portion includes the other of the fixing hole and the fixing boss, the fixing hole and the fixing boss are correspondingly arranged, and the fixing boss is assembled into the fixing hole.

[0029] In the above technical solution, by providing that the connecting pipe structure has a first fixing portion and a second fixing portion, the first fixing portion includes one of a fixing hole and a fixing boss, the second fixing portion includes the other of the fixing hole and the fixing boss, and the first fixing portion and the second fixing portion are cooperatively assembled, the outer pipe and the inner pipe of the connecting pipe structure can be tightly combined, which is beneficial to improving the integrity of the connecting pipe structure and can improve the reliability of the connecting pipe structure.

[0030] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

[0032] Figure 1 is a schematic diagram of an electric device provided by some embodiments of the present application;

[0033] Figure 2 is a schematic diagram of a battery device provided by some embodiments of the present application;

[0034] Figure 3 is a schematic diagram of a connecting pipe structure provided by some embodiments of the present application;

[0035] Figure 4A front view of a connecting pipe structure provided in some embodiments of the present application;

[0036] Figure 5 for Figure 4 Schematic cross-sectional view at AA in the middle;

[0037] Figure 6 A schematic diagram of an outer tube provided for some embodiments of the present application;

[0038] Figure 7 A schematic diagram of an inner tube provided in some embodiments of the present application;

[0039] Figure 8 A schematic diagram of a connection portion provided in some embodiments of the present application being located on a side of the outer tube facing away from the inner tube;

[0040] Figure 9 A front view of a connection portion provided in some embodiments of the present application, which is located on a side of the outer tube facing away from the inner tube;

[0041] Figure 10 for Figure 9 A schematic cross-sectional view of the middle BB;

[0042] Figure 11 A schematic diagram showing that a coated flange is formed at the end of the inner tube provided in some embodiments of the present application;

[0043] Figure 12 A front view of an inner tube provided in some embodiments of the present application with a coated flange formed at the end thereof;

[0044] Figure 13 for Figure 12 Schematic cross-sectional view at CC in the middle.

[0045] Reference numerals:

[0046] The electric device 100,

[0047] Battery device 110,

[0048] The connecting pipe structure 10,

[0049] Outer tube 11, first tube body 111, second tube body 112, third tube body 113, inner tube 12, fourth tube body 121, fifth tube body 122, sixth tube body 123, fixing hole 13, fixing boss 14, connecting part 15, fixing edge 16, covering flange 17, connecting structure 18,

[0050] Box 20,

[0051] Battery cell 30,

[0052] Controller 120 , electric motor 130 . DETAILED DESCRIPTION

[0053] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where 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 by referring to the accompanying drawings are exemplary only for explaining the present application and should not be construed as limiting the present application.

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts fall within the scope of protection of the present application.

[0055] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs; the terms used in the description of the present application in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the description and claims of the present application and the above drawings are intended to cover non-exclusive inclusion.

[0056] Referring to "embodiments" in the present application means that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0057] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", and "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0058] In the embodiments of the present application, the same reference numerals denote the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, and other dimensions of various components shown in the drawings in the embodiments of the present application, as well as the overall thickness, length, width, and other dimensions of the integrated device, are only for illustrative purposes and should not constitute any limitation to the present application.

[0059] In this application, "a plurality of" means two or more (including two).

[0060] In this application, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., and the embodiments of this application do not limit this. The battery cell can be in a cylindrical shape, a flat shape, a cuboid shape, or other shapes, etc., and the embodiments of this application do not limit this either. Generally, the battery cell is divided into three types according to the encapsulation method: a cylindrical battery cell, a square battery cell, and a soft-pack battery cell, and the embodiments of this application do not limit this either.

[0061] The battery device mentioned in the embodiments of this application refers to a single physical module including one or more battery cells to provide a higher voltage and capacity. For example, the battery device mentioned in this application may include a battery module or a battery pack, etc. Generally, the battery device includes a box for encapsulating a plurality of battery cells or a plurality of battery modules. The box can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

[0062] The battery cell may include a housing, an electrode assembly, and an electrolyte. The housing is used to accommodate the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode tab, a negative electrode tab, and a separator. The battery cell mainly works by the movement of metal ions between the positive electrode tab and the negative electrode tab. The positive electrode tab includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The positive electrode current collector without the coated positive electrode active material layer protrudes from the positive electrode current collector with the coated positive electrode active material layer. The positive electrode current collector without the coated positive electrode active material layer serves as the positive electrode ear. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode tab includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector without the coated negative electrode active material layer protrudes from the negative electrode current collector with the coated negative electrode active material layer. The negative electrode current collector without the coated negative electrode active material layer serves as the negative electrode ear. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current can pass through without fusing, the number of positive electrode ears is a plurality and they are stacked together, and the number of negative electrode ears is a plurality and they are stacked together.

[0063] The material of the separator can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a wound structure or a stacked structure, and the embodiments of this application are not limited thereto.

[0064] In recent years, with the continuous development of new energy vehicles, in the field of electric vehicles, the battery device, as the power source of the electric vehicle, plays an irreplaceable and important role. The battery device may include a connecting pipe structure, a box body, a plurality of heat exchange structures, and a plurality of battery cells. The connecting pipe structure can be used to connect two components that need to be connected. As an example, at least two heat exchange structures can be connected through the connecting pipe structure.

[0065] In the related art, the existing connecting pipe structure can be a double-layer pipe. The inner and outer layers of the double-layer pipe can be bonded through the performance of the materials used. Due to the consistency difference of the materials and the instability of the process, the inner and outer layers of the double-layer pipe may be poorly bonded, resulting in poor reliability of the connecting pipe structure and low reliability of the battery device.

[0066] Based on the above considerations, in order to solve the problem of low reliability of the battery device, after in-depth research, a battery device is designed, including: a connecting pipe structure, the connecting pipe structure includes an outer layer pipe and an inner layer pipe, the outer layer pipe is sleeved outside the inner layer pipe, the inner surface of the outer layer pipe and the outer surface of the inner layer pipe are bonded, the outer layer pipe has a first fixing portion, the inner layer pipe has a second fixing portion, the first fixing portion and the second fixing portion are cooperatively assembled to position the relative positions of the outer layer pipe and the inner layer pipe. The first fixing portion includes one of a fixing hole and a fixing boss, the second fixing portion includes the other of the fixing hole and the fixing boss, the fixing hole and the fixing boss are correspondingly arranged, and the fixing boss is assembled into the fixing hole.

[0067] In the battery device with this structure, the outer layer pipe and the inner layer pipe can be adhesively connected. The first fixing portion is configured as one of a fixing hole and a fixing boss, the second fixing portion is configured as the other of the fixing hole and the fixing boss, and the first fixing portion and the second fixing portion are cooperatively assembled, which can reduce the risk of relative position change between the outer layer pipe and the inner layer pipe, can reduce the probability of the inner layer pipe moving relative to the outer layer pipe, can improve the connection strength between the outer layer pipe and the inner layer pipe, the outer layer pipe and the inner layer pipe can be better combined, which is beneficial to improving the integrity and reliability of the connecting pipe structure, making the integrity and reliability of the connecting pipe structure good, and can improve the reliability of the battery device.

[0068] The battery device disclosed in the embodiments of the present application can be but is not limited to being used in power-consuming devices such as vehicles, ships, or aircraft. The power-consuming devices that can be connected to the battery device disclosed in the present application are all power-consuming devices applicable to the battery device disclosed in the embodiments of the present application, which is beneficial to expanding the application scope of the battery device.

[0069] For the convenience of description in the following embodiments, a power-consuming device 100 in some embodiments of the present application is taken as an example of a vehicle for description.

[0070] Please refer to Figure 1 , Figure 1Schematic diagram of the electrical device provided by some embodiments of the present application. The electrical device 100 may be a vehicle, and the vehicle may be a new energy vehicle, which may be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A battery device 110 may be provided inside the vehicle, and the battery device 110 may be disposed at the bottom, head, or tail of the vehicle. The battery device 110 can be used to supply power to the vehicle. For example, the battery device 110 can be used as the operating power source of the vehicle, and the battery device 110 can be used as the power source of the vehicle. The vehicle may further include a controller 120 and a motor 130. The controller 120 is used to control the battery device 110 to supply power to the motor 130. The battery device 110 is used for the working power requirements in situations such as starting, navigating, and driving of the vehicle. The battery device 110 is connected to the vehicle to realize the application of the battery device 110 in the vehicle.

[0071] Please refer to Figure 2 , Figure 2 Schematic diagram of the battery device 110 provided by some embodiments of the present application. The battery device 110 may include a box body 20 and a plurality of battery cells 30. The battery cells 30 are installed in the box body 20. Among them, the box body 20 provides an assembly space for the battery cells 30, and the box body 20 can be of various shapes, such as: a cylinder, a cuboid, etc.

[0072] In the battery device 110, the plurality of battery cells 30 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the plurality of battery cells 30. The plurality of battery cells 30 can be directly connected in series, in parallel, or in a mixed connection together, and then the whole formed by the plurality of battery cells 30 is accommodated in the box body 20; of course, the battery device 110 can also be that a plurality of battery cells 30 are first connected in series, in parallel, or in a mixed connection to form a battery module, and then a plurality of battery modules are connected in series, in parallel, or in a mixed connection to form a whole and are accommodated in the box body 20.

[0073] Among them, each battery cell 30 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 30 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0074] According to some embodiments of the present application, some embodiments of the present application provide a battery device 110, and the battery device 110 may include a communicating pipe structure 10, such as Figures 3 - 5As shown, the communicating pipe structure 10 includes an outer layer pipe 11 and an inner layer pipe 12. The outer layer pipe 11 is sleeved outside the inner layer pipe 12. The inner surface of the outer layer pipe 11 is bonded to the outer surface of the inner layer pipe 12. The outer layer pipe 11 has a first fixing portion, and the inner layer pipe 12 has a second fixing portion. The first fixing portion and the second fixing portion are cooperatively assembled to position the relative positions of the outer layer pipe 11 and the inner layer pipe 12. The first fixing portion includes one of a fixing hole 13 and a fixing boss 14, and the second fixing portion includes the other of the fixing hole 13 and the fixing boss 14. The fixing hole 13 and the fixing boss 14 are correspondingly arranged, and the fixing boss 14 is assembled into the fixing hole 13.

[0075] Among them, the battery device 110 may include a communicating pipe structure 10, and the communicating pipe structure 10 may be used to communicate two components that need to be communicated within the battery device 110. The communicating pipe structure 10 may be configured as a tubular structure with a circular cross-section. The communicating pipe structure 10 may include an outer layer pipe 11 and an inner layer pipe 12. Along the radial direction of the communicating pipe structure 10, the outer layer pipe 11 may be sleeved outside the inner layer pipe 12. The structure of the outer layer pipe 11 may be adapted to the structure of the inner layer pipe 12. The inner surface of the outer layer pipe 11 may be fitted to the outer surface of the inner layer pipe 12, and the inner surface of the outer layer pipe 11 may be bonded to the outer surface of the inner layer pipe 12. The hardness of the outer layer pipe 11 may be greater than the hardness of the inner layer pipe 12. As an example, the outer layer pipe 11 may be a plastic part, and the inner layer pipe 12 may be a rubber part. The inner layer pipe 12 and the outer layer pipe 11 may be integrally formed by injection molding, and the outer layer pipe 11 and the inner layer pipe 12 may be adhesively connected through the performance of the materials used.

[0076] The outer layer pipe 11 has a first fixing portion, and the inner layer pipe 12 has a second fixing portion. The first fixing portion and the second fixing portion may be cooperatively assembled to position the relative positions of the outer layer pipe 11 and the inner layer pipe 12, thereby reducing the risk of relative position change between the outer layer pipe 11 and the inner layer pipe 12, reducing the probability of the inner layer pipe 12 moving relative to the outer layer pipe 11, improving the connection strength between the outer layer pipe 11 and the inner layer pipe 12, enabling the outer layer pipe 11 and the inner layer pipe 12 to be better combined, and being beneficial to improving the integrity of the connecting pipe structure 10. The first fixing portion may be multiple, and the second fixing portion may be multiple. The multiple first fixing portions and the multiple second fixing portions may be correspondingly arranged one by one. Each first fixing portion has a correspondingly arranged second fixing portion, and each first fixing portion may be cooperatively assembled with the corresponding second fixing portion, thereby achieving the effect of further fixing the relative positions of the outer layer pipe 11 and the inner layer pipe 12 and improving the firmness of the connection between the outer layer pipe 11 and the inner layer pipe 12.

[0077] As an example, the first fixing part can be one of the clamping structure and the clamping groove, and the second fixing part can be the other of the clamping structure and the clamping groove. The clamping structure can be assembled into the clamping groove, so as to reduce the risk of relative position change between the outer tube 11 and the inner tube 12, and make the structure of the connecting tube structure 10 stable. As another example, both the first fixing part and the second fixing part can be constructed as magnetic attraction parts, and the first fixing part and the second fixing part can be magnetically attracted and matched with each other, so as to fix the relative positions of the outer tube 11 and the inner tube 12.

[0078] As Figure 3 shown, the first fixing part can include one of the fixing hole 13 and the fixing boss 14, and the second fixing part can include the other of the fixing hole 13 and the fixing boss 14. The fixing hole 13 and the fixing boss 14 can be arranged corresponding to each other along the arrangement direction of the outer tube 11 and the inner tube 12. The fixing boss 14 can be assembled into the corresponding fixing hole 13, and the fixing boss 14 can abut against and limit the inner wall of the corresponding fixing hole 13, so as to limit the fixing boss 14 in the corresponding fixing hole 13, thereby positioning the relative positions of the outer tube 11 and the inner tube 12, reducing the risk of relative position change between the outer tube 11 and the inner tube 12, reducing the probability of separation between the outer tube 11 and the inner tube 12, and reducing the probability of the inner tube 12 moving relative to the outer tube 11, which is beneficial to improving the integrity and reliability of the connecting tube structure 10.

[0079] In the above technical solution, the outer tube 11 and the inner tube 12 can be adhesively connected. The first fixing part is constructed as one of the fixing hole 13 and the fixing boss 14, and the second fixing part is constructed as the other of the fixing hole 13 and the fixing boss 14. The first fixing part and the second fixing part are assembled in cooperation, which can reduce the risk of relative position change between the outer tube 11 and the inner tube 12, reduce the probability of the inner tube 12 moving relative to the outer tube 11, improve the connection strength between the outer tube 11 and the inner tube 12, enable the outer tube 11 and the inner tube 12 to be better combined, be beneficial to improving the integrity and reliability of the connecting tube structure 10, make the integrity and reliability of the connecting tube structure 10 good, and improve the reliability of the battery device 110.

[0080] As an example, as Figure 6As shown in the figure, the outer tube 11 may include a first tube body 111, a second tube body 112, and a third tube body 113. The first tube body 111, the second tube body 112, and the third tube body 113 may be arranged in sequence along the axial direction of the outer tube 11. The second tube body 112 may be connected between the first tube body 111 and the third tube body 113. The first tube body 111 and the third tube body 113 may be located at both ends of the second tube body 112 respectively. The second tube body 112 may be a tubular structure with a constant cross-sectional area. Along the axial direction of the outer tube 11, in the direction from the second tube body 112 to the first tube body 111, the cross-sectional area of the first tube body 111 gradually increases. In the direction from the second tube body 112 to the third tube body 113, the cross-sectional area of the third tube body 113 gradually increases. The shapes of the first tube body 111 and the third tube body 113 may be the same. The second tube body 112 may have a central plane located in the middle of the second tube body 112 along the axial direction of the second tube body 112. The central plane may extend along the radial direction of the second tube body 112. The first tube body 111 and the third tube body 113 may be symmetrically arranged with respect to the central plane of the second tube body 112.

[0081] As Figure 7 shown in the figure, the inner tube 12 may include a fourth tube body 121, a fifth tube body 122, and a sixth tube body 123. The fourth tube body 121, the fifth tube body 122, and the sixth tube body 123 may be arranged in sequence along the axial direction of the inner tube 12. The fifth tube body 122 may be connected between the fourth tube body 121 and the sixth tube body 123. The fourth tube body 121 and the sixth tube body 123 may be located at both ends of the fifth tube body 122 respectively. The fifth tube body 122 may be a tubular structure with a constant cross-sectional area. Along the axial direction of the outer tube 11, in the direction from the fifth tube body 122 to the fourth tube body 121, the cross-sectional area of the fourth tube body 121 gradually increases. In the direction from the fifth tube body 122 to the sixth tube body 123, the cross-sectional area of the sixth tube body 123 gradually increases. The shapes of the fourth tube body 121 and the sixth tube body 123 may be the same. The fifth tube body 122 may have a central plane located in the middle of the fifth tube body 122 along the axial direction of the fifth tube body 122. The central plane may extend along the radial direction of the fifth tube body 122. The fourth tube body 121 and the sixth tube body 123 may be symmetrically arranged with respect to the central plane of the fifth tube body 122.

[0082] As Figures 3 - 7 shown in the figure, along the arrangement direction of the outer tube 11 and the inner tube 12, the first tube body 111 may be correspondingly arranged with the fourth tube body 121, and the inner surface of the first tube body 111 may be bonded to the outer surface of the fourth tube body 121. The second tube body 112 may be correspondingly arranged with the fifth tube body 122, and the inner surface of the second tube body 112 may be bonded to the outer surface of the fifth tube body 122. The third tube body 113 may be correspondingly arranged with the sixth tube body 123, and the inner surface of the third tube body 113 may be bonded to the outer surface of the sixth tube body 123.

[0083] As an example, asFigure 3 As shown, the connecting pipe structure 10 may be formed with a connecting structure 18. The connecting structure 18 may extend circumferentially along the connecting pipe structure 10. The connecting structure 18 may be provided on the outer surface of the outer layer pipe 11. The connecting structure 18 may protrude radially away from the outer layer pipe 11 along the connecting pipe structure 10. The connecting structure 18 may be provided on the central plane of the second pipe body 112. The connecting pipe structure 10 may be connected to other components in the battery device 110 through the connecting structure 18.

[0084] According to some embodiments of the present application, as Figures 3 - 5 shown, both the fixing holes 13 and the fixing bosses 14 are multiple, and the multiple fixing holes 13 and the multiple fixing bosses 14 correspond to each other one by one.

[0085] Among them, both the fixing holes 13 and the fixing bosses 14 may be multiple. The multiple fixing holes 13 and the multiple fixing bosses 14 may be arranged in a one-to-one correspondence. Each fixing boss 14 has a corresponding fixing hole 13. Each fixing boss 14 may be assembled with the corresponding fixing hole 13, so as to further define the relative positions of the outer layer pipe 11 and the inner layer pipe 12, further improve the connection strength between the outer layer pipe 11 and the inner layer pipe 12, and further reduce the probability of separation between the outer layer pipe 11 and the inner layer pipe 12.

[0086] In the above technical solution, by setting both the fixing holes 13 and the fixing bosses 14 to be multiple, the relative positions of the outer layer pipe 11 and the inner layer pipe 12 can be further defined, the connection strength between the outer layer pipe 11 and the inner layer pipe 12 can be further improved, and the probability of separation between the outer layer pipe 11 and the inner layer pipe 12 can be further reduced.

[0087] According to some embodiments of the present application, as Figure 3 shown, the multiple fixing holes 13 form at least one set of fixing hole groups. Each set of fixing hole groups includes multiple fixing holes 13. The multiple fixing holes 13 in each set of fixing hole groups are arranged circumferentially along the connecting pipe structure 10. The multiple fixing bosses 14 form at least one set of fixing boss groups. Each set of fixing boss groups includes multiple fixing bosses 14. The multiple fixing bosses 14 in each set of fixing boss groups are arranged circumferentially along the connecting pipe structure 10.

[0088] Among them, multiple fixing holes 13 can form at least one set of fixing hole groups. Each set of fixing hole groups can include multiple fixing holes 13. The multiple fixing holes 13 in each set of fixing hole groups can be arranged along the circumferential direction of the connecting pipe structure 10. The multiple fixing holes 13 can be arranged at intervals along the circumferential direction of the connecting pipe structure 10. The interval distance between any two adjacent fixing holes 13 can be the same. As an example, if the multiple fixing holes 13 are provided on the inner layer pipe 12, the multiple fixing holes 13 in each set of fixing hole groups can be arranged along the circumferential direction of the inner layer pipe 12. If the multiple fixing holes 13 are provided on the outer layer pipe 11, the multiple fixing holes 13 in each set of fixing hole groups can be arranged along the circumferential direction of the outer layer pipe 11.

[0089] Multiple fixing bosses 14 form at least one set of fixing boss groups. Each set of fixing boss groups can include multiple fixing bosses 14. The multiple fixing bosses 14 in each set of fixing boss groups can be arranged along the circumferential direction of the connecting pipe structure 10. The multiple fixing bosses 14 can be arranged at intervals along the circumferential direction of the connecting pipe structure 10. The interval distance between any two adjacent fixing bosses 14 can be the same. As an example, if the multiple fixing bosses 14 are provided on the inner layer pipe 12, the multiple fixing bosses 14 in each set of fixing boss groups can be arranged along the circumferential direction of the inner layer pipe 12. If the multiple fixing bosses 14 are provided on the outer layer pipe 11, the multiple fixing bosses 14 in each set of fixing boss groups can be arranged along the circumferential direction of the outer layer pipe 11.

[0090] The number of fixing hole groups can be the same as the number of fixing boss groups. The number of fixing holes 13 in each set of fixing hole groups can be the same as the number of fixing bosses 14 in each set of fixing boss groups. Each set of fixing hole groups and each set of fixing boss groups can be arranged corresponding to each other along the arrangement direction of the outer layer pipe 11 and the inner layer pipe 12, so that the multiple fixing holes 13 can be assembled in one-to-one correspondence with the multiple fixing bosses 14.

[0091] In the above technical solution, the multiple fixing holes 13 in each set of fixing hole groups can be arranged along the circumferential direction of the connecting pipe structure 10. The multiple fixing bosses 14 in each set of fixing boss groups can be arranged along the circumferential direction of the connecting pipe structure 10. The multiple fixing holes 13 and the corresponding fixing bosses 14 can be assembled in one-to-one correspondence along the circumferential direction of the connecting pipe structure 10, so as to realize the positioning and matching of the inner layer pipe 12 and the outer layer pipe 11 in the circumferential direction of the connecting pipe structure 10, which is more beneficial to improving the stability and reliability of the connecting pipe structure 10.

[0092] According to some embodiments of the present application, as Figure 3 shown, multiple fixing holes 13 form multiple sets of fixing hole groups, multiple fixing bosses 14 form multiple sets of fixing boss groups, and the multiple sets of fixing hole groups are arranged along the axial direction of the connecting pipe structure 10, and the multiple sets of fixing boss groups are arranged along the axial direction of the connecting pipe structure 10.

[0093] Among them, multiple fixing holes 13 form multiple groups of fixing hole groups. Each group of fixing hole groups includes multiple fixing holes 13, and the multiple groups of fixing hole groups can be arranged along the axial direction of the connecting pipe structure 10. Multiple fixing bosses 14 form multiple groups of fixing boss groups. Each group of fixing boss groups includes multiple fixing bosses 14, and the multiple groups of fixing boss groups can be arranged along the axial direction of the connecting pipe structure 10. The multiple groups of fixing hole groups and the multiple groups of fixing boss groups can be arranged in one-to-one correspondence along the axial direction of the connecting pipe structure 10. Each group of fixing hole groups has a corresponding group of fixing bosses. The number of fixing holes 13 in each group of fixing hole groups can be the same as the number of fixing bosses 14 in each group of fixing boss groups, so as to achieve the effect of one-to-one matching and assembly of the multiple fixing holes 13 and the multiple fixing bosses 14.

[0094] In the above technical solution, the multiple groups of fixing hole groups and the multiple groups of fixing boss groups can be arranged in one-to-one correspondence along the axial direction of the connecting pipe structure 10, which can realize the positioning and matching of the inner layer pipe 12 and the outer layer pipe 11 in the axial direction of the connecting pipe structure 10, and is more conducive to improving the stability and reliability of the connecting pipe structure 10.

[0095] According to some embodiments of the present application, the shape of the fixing hole 13 is adapted to the shape of the fixing boss 14.

[0096] Among them, the fixing boss 14 is assembled in the fixing hole 13. The fixing boss 14 can be in contact with and limited by the inner wall of the fixing hole 13. The shape of the fixing hole 13 can be adapted to the shape of the fixing boss 14. The adapted shape can enable the fixing boss 14 and the fixing hole 13 to achieve precise positioning during assembly, can enable the fixing boss 14 and the fixing hole 13 to achieve a tighter fit, can enable the outer layer pipe 11 and the inner layer pipe 12 to be tightly connected, can improve the integrity of the connecting pipe structure 10, further reduce the probability of separation between the outer layer pipe 11 and the inner layer pipe 12, and further improve the reliability of the connecting pipe structure 10.

[0097] In the above technical solution, the shape of the fixing hole 13 is adapted to the shape of the fixing boss 14, so that the outer layer pipe 11 and the inner layer pipe 12 are tightly connected, which can further improve the integrity of the connecting pipe structure 10, further reduce the probability of separation between the outer layer pipe 11 and the inner layer pipe 12, and further improve the reliability of the connecting pipe structure 10.

[0098] According to some embodiments of the present application, as Figure 4 shown, the outer layer pipe 11 is formed with fixing holes 13, and the outer surface of the inner layer pipe 12 is formed with fixing bosses 14 protruding towards the outer layer pipe 11. From the direction of the outer layer pipe 11 to the inner layer pipe 12, the cross-sectional areas of both the fixing holes 13 and the fixing bosses 14 gradually decrease.

[0099] Among them, the outer tube 11 can be formed with fixing holes 13, and the fixing holes 13 can penetrate the outer tube 11 along the thickness direction of the outer tube 11. A plurality of fixing holes 13 form multiple groups of fixing hole groups, and the multiple groups of fixing hole groups can be arranged along the axial direction of the outer tube 11. The multiple fixing holes 13 in each group of fixing hole groups can be arranged along the circumferential direction of the outer tube 11. The outer surface of the inner tube 12 is formed with fixing bosses 14 protruding towards the outer tube 11. A plurality of fixing bosses 14 form multiple groups of fixing boss groups, and the multiple groups of fixing boss groups can be arranged along the axial direction of the inner tube 12. The multiple fixing bosses 14 in each group of fixing boss groups can be arranged along the circumferential direction of the inner tube 12. The multiple fixing bosses 14 can be in one-to-one correspondence and mating assembly with the multiple fixing holes 13 along the arrangement direction of the outer tube 11 and the inner tube 12. The fixing bosses 14 can extend along the arrangement direction of the outer tube 11 and the inner tube 12, and the end surface of the fixing bosses 14 can be coplanar with the outer surface of the outer tube 11, so that the outer surface of the outer tube 11 is smooth and flat, which is beneficial to improving the integrity of the connecting pipe structure 10.

[0100] From the direction of the outer tube 11 to the inner tube 12, the cross-sectional areas of the fixing holes 13 and the fixing bosses 14 both gradually decrease. When the fixing bosses 14 and the corresponding fixing holes 13 are in mating assembly, the outer tube 11 and the inner tube 12 can be snap-connected, reducing the risk of relative position change between the outer tube 11 and the inner tube 12. And the inner surface of the outer tube 11 and the outer surface of the inner tube 12 are bonded, the outer tube 11 and the inner tube 12 can be closely fitted, and the outer tube 11 and the inner tube 12 are well combined, which is more beneficial to improving the integrity of the connecting pipe structure 10 and further reducing the risk of separation between the outer tube 11 and the inner tube 12.

[0101] As an example, there can be two groups of fixing hole groups and two groups of fixing boss groups. The two groups of fixing hole groups can be respectively arranged on the first tube body 111 and the third tube body 113, and the two groups of fixing boss groups can be respectively arranged on the fourth tube body 121 and the sixth tube body 123. The first tube body 111 is sleeved outside the fourth tube body 121, and the third tube body 113 is sleeved outside the sixth tube body 123. Each of the multiple fixing bosses 14 has a corresponding fixing hole 13, and the multiple fixing bosses 14 and the multiple fixing holes 13 are in one-to-one correspondence and mating assembly.

[0102] In the above technical solution, the outer tube 11 is formed with fixing holes 13, the inner tube 12 is formed with fixing bosses 14, the fixing bosses 14 and the fixing holes 13 are in mating assembly, the outer tube 11 and the inner tube 12 can be closely fitted, and the outer tube 11 and the inner tube 12 are well combined, which is more beneficial to improving the integrity of the connecting pipe structure 10 and further reducing the risk of separation between the outer tube 11 and the inner tube 12.

[0103] According to some embodiments of the present application, such as Figures 8 - 10As shown, the battery device 110 may further include: a connecting portion 15, which is located on the side of the outer layer tube 11 away from the inner layer tube 12. The connecting portion 15 connects at least two fixing bosses 14, and the connecting portion 15 abuts against the outer surface of the outer layer tube 11.

[0104] Among them, both the fixing holes 13 and the fixing bosses 14 may be multiple. The multiple fixing holes 13 may correspond to the multiple fixing bosses 14 one by one. The fixing bosses 14 may protrude towards the outer layer tube 11, and the end surface of the fixing bosses 14 may be coplanar with the outer surface of the outer layer tube 11. The connecting portion 15 may be provided on the side of the outer layer tube 11 away from the inner layer tube 12. The connecting portion 15 may be in limit fit with the outer layer tube 11, the connecting portion 15 may abut against the outer surface of the outer layer tube 11, the connecting portion 15 may be connected to the fixing bosses 14, the connecting portion 15 may be connected to at least two fixing bosses 14, the connecting portion 15 may make at least two fixing bosses 14 into an integral structure, the connecting portion 15 may connect multiple fixing bosses 14 from the side of the outer layer tube 11 away from the inner layer tube 12, which can achieve the effect of further defining the relative positions of the outer layer tube 11 and the inner layer tube 12, and can further improve the stability of the connecting tube structure 10.

[0105] As an example, the multiple fixing bosses 14 in each group of fixing boss groups may be arranged circumferentially along the connecting tube structure 10. The connecting portion 15 may be configured as an annular structure, the connecting portion 15 may extend circumferentially along the outer layer tube 11, the connecting portion 15 may be connected to the multiple fixing bosses 14 in the corresponding fixing boss group, and the connecting portion 15 may be made into an integral structure with the multiple fixing bosses 14 in the corresponding fixing boss group. The connecting portions 15 may be multiple, the multiple connecting portions 15 may be arranged axially along the outer layer tube 11, and the multiple connecting portions 15 may be arranged in one-to-one correspondence with the multiple fixing boss groups.

[0106] In the above technical solution, the connecting portion 15 connects the fixing bosses 14 from the side of the outer layer tube 11 away from the inner layer tube 12, which can achieve the effect of further defining the relative positions of the outer layer tube 11 and the inner layer tube 12, and can further improve the stability of the connecting tube structure 10.

[0107] According to some embodiments of the present application, the inner layer tube 12 is formed with fixing holes 13, and the inner surface of the outer layer tube 11 is formed with fixing bosses 14 protruding towards the inner layer tube 12. From the direction of the outer layer tube 11 to the inner layer tube 12, the cross-sectional areas of both the fixing holes 13 and the fixing bosses 14 gradually increase.

[0108] Among them, the inner layer tube 12 can be formed with fixing holes 13, and the fixing holes 13 can penetrate through the inner layer tube 12 along the thickness direction of the inner layer tube 12. A plurality of fixing holes 13 form multiple groups of fixing hole groups, and the multiple groups of fixing hole groups can be arranged along the axial direction of the inner layer tube 12. The multiple fixing holes 13 in each group of fixing hole groups can be arranged along the circumferential direction of the inner layer tube 12. The inner surface of the outer layer tube 11 is formed with fixing bosses 14 protruding towards the inner layer tube 12. A plurality of fixing bosses 14 form multiple groups of fixing boss groups, and the multiple groups of fixing boss groups can be arranged along the axial direction of the outer layer tube 11. The multiple fixing bosses 14 in each group of fixing boss groups can be arranged along the circumferential direction of the outer layer tube 11. The multiple fixing bosses 14 can be in one-to-one correspondence and mating assembly with the multiple fixing holes 13 along the arrangement direction of the outer layer tube 11 and the inner layer tube 12. The fixing bosses 14 can extend along the arrangement direction of the inner layer tube 12 and the outer layer tube 11, and the end surfaces of the fixing bosses 14 can be coplanar with the inner surface of the inner layer tube 12, so that the inner surface of the inner layer tube 12 is smooth and flat, which is beneficial to improving the integrity of the connecting tube structure 10.

[0109] From the direction of the outer layer tube 11 to the inner layer tube 12, the cross-sectional areas of the fixing holes 13 and the fixing bosses 14 both gradually increase. When the fixing bosses 14 and the corresponding fixing holes 13 are in mating assembly, the inner layer tube 12 and the outer layer tube 11 can be snap-connected, thereby reducing the risk of the relative positions of the outer layer tube 11 and the inner layer tube 12 changing. And the outer surface of the inner layer tube 12 and the inner surface of the outer layer tube 11 are bonded, the inner layer tube 12 can be closely attached to the outer layer tube 11, and the inner layer tube 12 and the outer layer tube 11 are well combined, which is more beneficial to improving the integrity of the connecting tube structure 10 and further reducing the risk of the inner layer tube 12 and the outer layer tube 11 separating.

[0110] As an example, there can be two groups of fixing hole groups and two groups of fixing boss groups. The two groups of fixing hole groups can be respectively arranged on the fourth tube body 121 and the sixth tube body 123, and the two groups of fixing boss groups can be respectively arranged on the first tube body 111 and the third tube body 113. The first tube body 111 is sleeved outside the fourth tube body 121, and the third tube body 113 is sleeved outside the sixth tube body 123. Each of the multiple fixing bosses 14 has a corresponding fixing hole 13, and the multiple fixing bosses 14 and the multiple fixing holes 13 are in one-to-one correspondence and mating assembly.

[0111] In the above technical solution, the inner layer tube 12 is formed with fixing holes 13, the outer layer tube 11 is formed with fixing bosses 14, the fixing bosses 14 and the fixing holes 13 are in mating assembly, the outer layer tube 11 can be closely attached to the inner layer tube 12, and the outer layer tube 11 and the inner layer tube 12 are well combined, which is more beneficial to improving the integrity of the connecting tube structure 10 and further reducing the risk of the outer layer tube 11 and the inner layer tube 12 separating.

[0112] According to some embodiments of the present application, the battery device 110 may further include: a connecting portion 15 located inside the inner layer tube 12. The connecting portion 15 connects at least two fixing bosses 14 and abuts against the inner surface of the inner layer tube 12.

[0113] Wherein, both the fixing holes 13 and the fixing bosses 14 may be multiple. The multiple fixing holes 13 may correspond to the multiple fixing bosses 14 one by one. The fixing bosses 14 may protrude towards the inner layer tube 12. The end face of the fixing boss 14 may be coplanar with the inner surface of the inner layer tube 12. The connecting portion 15 may be located inside the inner layer tube 12. The connecting portion 15 may be provided on the side of the inner layer tube 12 facing away from the outer layer tube 11. The connecting portion 15 may be in limit fit with the inner layer tube 12. The connecting portion 15 may abut against the inner surface of the inner layer tube 12. The connecting portion 15 may be connected to the fixing boss 14. The connecting portion 15 may be connected to at least two fixing bosses 14. The connecting portion 15 may make at least two fixing bosses 14 form an integral structure. The connecting portion 15 may connect multiple fixing bosses 14 from the side of the inner layer tube 12 facing away from the outer layer tube 11, which can achieve the effect of further defining the relative positions of the outer layer tube 11 and the inner layer tube 12, and can further improve the stability of the connecting tube structure 10.

[0114] As an example, the multiple fixing bosses 14 in each group of fixing boss groups may be arranged circumferentially along the connecting tube structure 10. The connecting portion 15 may be constructed as an annular structure. The connecting portion 15 may extend circumferentially along the inner layer tube 12. The connecting portion 15 may be connected to the multiple fixing bosses 14 in the corresponding fixing boss group, and the connecting portion 15 may form an integral structure with the multiple fixing bosses 14 in the corresponding fixing boss group. There may be multiple connecting portions 15. The multiple connecting portions 15 may be arranged axially along the inner layer tube 12. The multiple connecting portions 15 may be provided corresponding to the multiple fixing boss groups one by one.

[0115] In the above technical solution, the connecting portion 15 connects the fixing boss 14 from inside the inner layer tube 12, which can achieve the effect of further defining the relative positions of the outer layer tube 11 and the inner layer tube 12, and can further improve the stability of the connecting tube structure 10.

[0116] According to some embodiments of the present application, as Figures 11 - 13 shown, along the axial direction of the connecting tube structure 10, one of a fixing edge 16 and a covering flange 17 is formed at the end of the outer layer tube 11, and the other of the fixing edge 16 and the covering flange 17 is formed at the end of the inner layer tube 12. The covering flange 17 covers the fixing edge 16. The first fixing portion further includes one of the fixing edge 16 and the covering flange 17, and the second fixing portion further includes the other of the fixing edge 16 and the covering flange 17 constructed as the second fixing portion.

[0117] Among them, along the axial direction of the connecting tube structure 10, the end of the outer tube 11 is formed with one of the fixed edge 16 and the covering flange 17, and the end of the inner tube 12 is formed with the other of the fixed edge 16 and the covering flange 17. The covering flange 17 can cover the fixed edge 16, and the covering flange 17 can be limitedly abutted with the fixed edge 16, thereby further defining the relative position of the outer tube 11 and the inner tube 12. The first fixing part also includes one of the fixed edge 16 and the covering flange 17, and the second fixing part also includes the other of the fixed edge 16 and the covering flange 17. The first fixing part and the second fixing part are assembled in cooperation, thereby positioning the relative position of the outer tube 11 and the inner tube 12, and reducing the risk of the relative position change of the outer tube 11 and the inner tube 12.

[0118] The first fixing portion may include one of the fixing hole 13 and the fixing boss 14 and one of the fixing edge 16 and the covering flange 17, and the second fixing portion may include the other of the fixing hole 13 and the fixing boss 14 and the other of the fixing edge 16 and the covering flange 17. The fixing edge 16, the covering flange 17, the fixing hole 13 and the fixing boss 14 may be used together to define the relative position of the outer layer tube 11 and the inner layer tube 12, thereby achieving the effect of further fixing the relative position of the outer layer tube 11 and the inner layer tube 12.

[0119] like Figure 13 As shown, the present application takes the example in which a fixed edge 16 is formed at the end of the outer tube 11 and a covering flange 17 is formed at the end of the inner tube 12. The covering flange 17 is covered on the fixed edge 16. The covering flange 17 can extend to the side of the outer tube 11 away from the inner tube 12. At least a portion of the covering flange 17 can be abutted and limited against the outer surface of the outer tube 11, thereby fixing the relative positions of the outer tube 11 and the inner tube 12.

[0120] In the above technical solution, by setting the covering flange 17 and the fixed edge 16, the relative position of the outer tube 11 and the inner tube 12 can be further fixed, and the connection strength between the outer tube 11 and the inner tube 12 can be further strengthened, which is more conducive to enhancing the tightness of the connection between the outer tube 11 and the inner tube 12, and is more conducive to improving the integrity of the connecting tube structure 10.

[0121] According to some embodiments of the present application, Figure 2 and Figure 3 As shown, the battery device 110 may also include: a box body 20, multiple heat exchange structures and multiple battery cells 30, the connecting pipe structure 10, multiple heat exchange structures and multiple battery cells 30 are all arranged in the box body 20, the heat exchange structure cooperates with the corresponding battery cells 30 for heat exchange, and at least two heat exchange structures are connected through the connecting pipe structure 10.

[0122] Among them, the connecting pipe structure 10, multiple heat exchange structures, and multiple battery monomers 30 are all arranged inside the box body 20. As an example, the multiple battery monomers 30 can be directly fixedly connected to the box body 20. As another example, the multiple battery monomers 30 can be bundled by cable ties to form a battery module, and the battery module can be fixedly connected to the box body 20. The heat exchange structure is arranged inside the box body 20. The heat exchange structure can be in contact with at least one battery monomer 30, and the heat exchange structure can cooperate with the corresponding battery monomer 30 in heat exchange, so as to achieve the effect of adjusting the temperature of the corresponding battery monomer 30. The connecting pipe structure 10 can be connected to the heat exchange structure. At least two heat exchange structures can be connected through the connecting pipe structure 10. A heat exchange medium can flow inside the heat exchange structure, and the heat exchange medium can flow between the interconnected heat exchange structures, so that the heat on the battery device 110 is more evenly distributed, and the probability of local overheating of the battery device 110 can be reduced.

[0123] In the above technical solution, at least two heat exchange structures are connected through the connecting pipe structure 10. A heat exchange medium can flow inside the heat exchange structure, and the heat exchange medium can flow between the interconnected heat exchange structures, so that the heat distribution on the battery device 110 can be made uniform, which is beneficial to improving the heat dissipation performance of the battery device 110, making the temperature of the battery device 110 balanced and uniform, and is beneficial to improving the stability of the battery device 110.

[0124] According to some embodiments of the present application, as Figure 1 shown, the present application also provides an electrical device 100, including the battery device 110 of any of the above solutions.

[0125] Among them, the electrical device 100 can be any of the devices using the battery device 110 described above. Using the battery device 110 in the above embodiments can improve the reliability of the electrical device 100.

[0126] According to some embodiments of the present application, the present application embodiment also provides a connecting pipe structure 10. The connecting pipe structure 10 can include: an outer layer pipe 11 and an inner layer pipe 12. The outer layer pipe 11 is sleeved outside the inner layer pipe 12. The inner surface of the outer layer pipe 11 is bonded to the outer surface of the inner layer pipe 12. The outer layer pipe 11 has a first fixing portion, and the inner layer pipe 12 has a second fixing portion. The first fixing portion and the second fixing portion are cooperatively assembled to position the relative positions of the outer layer pipe 11 and the inner layer pipe 12. The first fixing portion includes one of a fixing hole 13 and a fixing boss 14, and the second fixing portion includes the other of the fixing hole 13 and the fixing boss 14. The fixing hole 13 and the fixing boss 14 are correspondingly arranged, and the fixing boss 14 is assembled into the fixing hole 13.

[0127] Among them, the connecting pipe structure 10 can be used to connect two adjacent components. The connecting pipe structure 10 can be configured as a tubular structure with a circular cross-section. As an example, the connecting pipe structure 10 can be used inside the battery device 110, and the connecting pipe structure can be used to connect multiple heat exchange structures inside the battery device 110. The connecting pipe structure 10 can include an outer layer pipe 11 and an inner layer pipe 12. Along the radial direction of the connecting pipe structure 10, the outer layer pipe 11 can be sleeved outside the inner layer pipe 12. The structure of the outer layer pipe 11 can be adapted to the structure of the inner layer pipe 12. The inner surface of the outer layer pipe 11 can be attached to the outer surface of the inner layer pipe 12, and the inner surface of the outer layer pipe 11 can be bonded to the outer surface of the inner layer pipe 12. The outer layer pipe 11 has a first fixing portion, and the inner layer pipe 12 has a second fixing portion. The first fixing portion can be assembled with the second fixing portion to position the relative positions of the outer layer pipe 11 and the inner layer pipe 12, thereby reducing the risk of change in the relative positions of the outer layer pipe 11 and the inner layer pipe 12, reducing the probability of the inner layer pipe 12 moving relative to the outer layer pipe 11, improving the connection strength between the outer layer pipe 11 and the inner layer pipe 12, enabling the outer layer pipe 11 and the inner layer pipe 12 to be better combined, and being beneficial to improving the integrity of the connecting pipe structure 10.

[0128] There can be multiple first fixing portions and multiple second fixing portions. The multiple first fixing portions and the multiple second fixing portions can be arranged in one-to-one correspondence. Each first fixing portion has a corresponding second fixing portion, and each first fixing portion can be assembled with the corresponding second fixing portion, thereby achieving the effect of further fixing the relative positions of the outer layer pipe 11 and the inner layer pipe 12, and improving the firmness of the connection between the outer layer pipe 11 and the inner layer pipe 12.

[0129] As Figure 3 shown, the first fixing portion can include one of a fixing hole 13 and a fixing boss 14, and the second fixing portion can include the other of the fixing hole 13 and the fixing boss 14. The fixing hole 13 and the fixing boss 14 can be arranged corresponding to each other along the arrangement direction of the outer layer pipe 11 and the inner layer pipe 12. The fixing boss 14 can be assembled into the corresponding fixing hole 13, and the fixing boss 14 can be abutted and limited against the inner wall of the corresponding fixing hole 13, thereby limiting the fixing boss 14 in the corresponding fixing hole 13, positioning the relative positions of the outer layer pipe 11 and the inner layer pipe 12, reducing the risk of change in the relative positions of the outer layer pipe 11 and the inner layer pipe 12, reducing the probability of separation between the outer layer pipe 11 and the inner layer pipe 12, reducing the probability of the inner layer pipe 12 moving relative to the outer layer pipe 11, and being beneficial to improving the integrity and reliability of the connecting pipe structure 10.

[0130] In the above technical solution, by providing that the connecting pipe structure 10 has a first fixing part and a second fixing part, where the first fixing part includes one of the fixing hole 13 and the fixing boss 14, and the second fixing part includes the other of the fixing hole 13 and the fixing boss 14, and the first fixing part and the second fixing part are assembled in cooperation, the outer layer pipe 11 and the inner layer pipe 12 of the connecting pipe structure 10 can be tightly combined, which is beneficial to improving the integrity of the connecting pipe structure 10 and can improve the reliability of the connecting pipe structure 10.

[0131] According to some embodiments of the present application, as Figures 3 - 13 shown, the present application provides a communicating pipe structure 10, which includes an outer layer pipe 11 and an inner layer pipe 12. The outer layer pipe 11 is sleeved outside the inner layer pipe 12, and the inner surface of the outer layer pipe 11 and the outer surface of the inner layer pipe 12 are bonded. The outer layer pipe 11 has a fixing hole 13, and the inner layer pipe 12 has a fixing boss 14, and the fixing boss 14 protrudes towards the outer layer pipe 11. In the direction from the outer layer pipe 11 to the inner layer pipe 12, the cross-sectional areas of both the fixing hole 13 and the fixing boss 14 gradually decrease, and the shape of the fixing hole 13 is adapted to the shape of the fixing boss 14. Both the fixing hole 13 and the fixing boss 14 are multiple, and the multiple fixing holes 13 and the multiple fixing bosses 14 correspond one by one. The multiple fixing holes 13 form two groups of fixing hole groups, and the two groups of fixing hole groups are arranged along the axial direction of the outer layer pipe 11. The two groups of fixing hole groups are respectively arranged on the first pipe body 111 and the third pipe body 113. Each group of fixing hole groups includes multiple fixing holes 13, and the multiple fixing holes 13 in each group of fixing hole groups are arranged along the circumferential direction of the outer layer pipe 11. The multiple fixing bosses 14 form two groups of fixing boss groups, and the two groups of fixing boss groups are arranged along the axial direction of the inner layer pipe 12. The two groups of fixing boss groups are respectively arranged on the fourth pipe body 121 and the sixth pipe body 123. Each group of fixing boss groups includes multiple fixing bosses 14, and the multiple fixing bosses 14 in each group of fixing boss groups are arranged along the circumferential direction of the inner layer pipe 12.

[0132] On the side of the outer layer pipe 11 facing away from the inner layer pipe 12, there are two connecting parts 15, which are respectively arranged on the first pipe body 111 and the third pipe body 113. Each connecting part 15 connects the multiple fixing bosses 14 in the corresponding fixing boss group. The connecting part 15 is configured as an annular shape, extends along the circumferential direction of the outer layer pipe 11, and abuts against the outer surface of the outer layer pipe 11. Along the axial direction of the communicating pipe structure 10, at the end of the outer layer pipe 11, there is a fixing edge 16, and at the end of the inner layer pipe 12, there is a covering flanging 17, and the covering flanging 17 covers the fixing edge 16.

[0133] The present application also provides a battery device 110, as Figure 2As shown, the battery device 110 further includes a box body 20, a plurality of heat exchange structures, and a plurality of battery cells 30. The communication pipe structure 10, the plurality of heat exchange structures, and the plurality of battery cells 30 are all disposed within the box body 20. The heat exchange structures are in heat exchange cooperation with the corresponding battery cells 30, and the plurality of heat exchange structures are all connected through the communication pipe structure 10.

[0134] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0135] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: A connecting pipe structure, the connecting pipe structure comprising an outer tube and an inner tube, the outer tube is sleeved outside the inner tube, the inner surface of the outer tube is bonded to the outer surface of the inner tube, the outer tube has a first fixing portion, the inner tube has a second fixing portion, the first fixing portion and the second fixing portion are assembled to locate the relative position of the outer tube and the inner tube; The first fixing portion includes one of a fixing hole and a fixing boss, and the second fixing portion includes the other of the fixing hole and the fixing boss. The fixing hole and the fixing boss are correspondingly arranged, and the fixing boss is assembled in the fixing hole.

2. The battery device according to claim 1, characterized in that: There are multiple fixing holes and multiple fixing bosses, and the multiple fixing holes correspond to the multiple fixing bosses one by one.

3. The battery device according to claim 2, characterized in that: The plurality of fixing holes form at least one group of fixing hole groups, each group of the fixing hole groups includes the plurality of fixing holes, and the plurality of fixing holes in each group of the fixing hole groups are arranged along the circumferential direction of the connecting tube structure; the plurality of fixing bosses form at least one group of fixing boss groups, each group of the fixing boss groups includes the plurality of fixing bosses, and the plurality of fixing bosses in each group of the fixing boss groups are arranged along the circumferential direction of the connecting tube structure.

4. The battery device according to claim 3, characterized in that: The plurality of fixing holes form a plurality of fixing hole groups, the plurality of fixing bosses form a plurality of fixing boss groups, the plurality of fixing hole groups are arranged along the axial direction of the connecting tube structure, and the plurality of fixing boss groups are arranged along the axial direction of the connecting tube structure.

5. The battery device according to claim 1, characterized in that: The shape of the fixing hole matches the shape of the fixing boss.

6. The battery device according to any one of claims 2 to 4, characterized in that: The outer tube is formed with the fixing hole, and the outer surface of the inner tube is formed with the fixing boss protruding toward the outer tube. From the outer tube to the inner tube, the cross-sectional areas of the fixing hole and the fixing boss gradually decrease.

7. The battery device according to claim 6, characterized in that: Also includes: A connecting portion, the connecting portion is located on a side of the outer tube away from the inner tube, the connecting portion connects at least two of the fixing bosses, and the connecting portion abuts against an outer surface of the outer tube.

8. The battery device according to any one of claims 2 to 4, characterized in that: The inner tube is formed with the fixing hole, and the inner surface of the outer tube is formed with the fixing boss protruding toward the inner tube. From the outer tube to the inner tube, the cross-sectional areas of the fixing hole and the fixing boss gradually increase.

9. The battery device according to claim 8, characterized in that: Also includes: A connecting portion, wherein the connecting portion is located inside the inner tube, the connecting portion connects at least two of the fixing bosses, and the connecting portion abuts against an inner surface of the inner tube.

10. The battery device according to any one of claims 1 to 5, characterized in that: Along the axial direction of the connecting tube structure, the end of the outer tube is formed with one of the fixed edge and the covering flange, the end of the inner tube is formed with the other of the fixed edge and the covering flange, the covering flange is covered on the fixed edge, the first fixing part also includes one of the fixed edge and the covering flange, and the second fixing part also includes the other of the fixed edge and the covering flange.

11. The battery device according to any one of claims 1 to 5, characterized in that: Also includes: Box; Multiple heat exchange structures and multiple battery cells, the connecting pipe structure, multiple heat exchange structures and multiple battery cells are all arranged in the box body, the heat exchange structure cooperates with the corresponding battery cells for heat exchange, and at least two of the heat exchange structures are connected through the connecting pipe structure.

12. An electrical device, characterized in that: Comprising a battery device according to any one of claims 1-11.

13. A connecting pipe structure, characterized in that: include: An outer tube and an inner tube, wherein the outer tube is sleeved on the outer side of the inner tube, the inner surface of the outer tube is bonded to the outer surface of the inner tube, the outer tube has a first fixing portion, and the inner tube has a second fixing portion, the first fixing portion and the second fixing portion are assembled to locate the relative position of the outer tube and the inner tube; The first fixing portion includes one of a fixing hole and a fixing boss, and the second fixing portion includes the other of the fixing hole and the fixing boss. The fixing hole and the fixing boss are correspondingly arranged, and the fixing boss is assembled in the fixing hole.

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