Connecting device, battery pack cooling system and vehicle

Abstract

The utility model relates to the technical field of connecting devices, in particular to a connecting device, a battery pack cooling system and a vehicle, and aims to solve the problem that miniaturization and light weight of an existing quick-change connecting device are difficult to realize. In order to achieve the purpose, the connecting device comprises a first plate, a second plate, a third plate and a fourth plate, the first connecting pipe penetrates through the first hole; the second plate piece is connected with the first connecting pipe and located on the first side of the first plate piece; the two ends of the first elastic component are connected with the first plate and the second plate correspondingly. And the first end of the moving piece is fixedly connected with the second plate piece, and the second end of the moving piece penetrates through the second hole. Compared with the prior art that a moving part moves downwards and an enough distance needs to be reserved between the lower end of the moving part and the battery pack end, the battery pack fixing device does not need to reserve an enough distance, so that the size of parts can be reduced, miniaturization and light weight are realized, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of connection devices, and specifically provides a connection device, a battery pack cooling system and a vehicle. Background Art

[0002] The cooling system of the vehicle battery pack includes a water pipe and a quick-change connection device. The water pipe is usually divided into two parts, one part is located near the battery pack, and the other part is located in other locations of the vehicle (outside the battery pack installation location). The water pipe flows through the battery pack to absorb heat, and then returns to the pipes in other locations of the vehicle to dissipate heat and cool down. Then it flows back to the pipes near the battery pack to cool the battery pack through the flowing cooling liquid. In order to facilitate the assembly of the whole vehicle, the water pipe near the battery pack is installed to the bottom of the vehicle together with the battery pack, and a quick-change connection device is used to connect the two parts of the pipe. The quick-change connection device generally includes a vehicle-end connection device fixedly connected to the bottom of the vehicle and a pack-end connection device fixedly connected to the battery pack.

[0003] Furthermore, in the actual production process, there are production errors between parts of the same type, and errors occur when different types of parts are assembled together. In order to absorb the tolerances and not affect the assembly, the existing technology sets a Z-direction spring and a bolt on the vehicle-end connection device. The bolt plays a guiding and connecting role, and the Z-direction spring is compressed to achieve Z-direction floating. However, during installation, the battery pack moves upward, and the lower end of the bolt moves downward relative to the battery pack. This requires that there is a certain distance between the pack-end connection device and the lower end of the bolt to allow the bolt to move, which results in an increase in the size of the part, making it difficult to achieve miniaturization and lightweighting of the part.

[0004] Accordingly, this field requires a new technical solution to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the above technical problem, that is, to solve the problem that existing quick-change connection devices are difficult to achieve miniaturization and lightweight.

[0006] In a first aspect, the utility model provides a connecting device, which includes: a first plate, a first hole and a second hole are provided on the first plate; a first connecting tube, the first connecting tube passes through the first hole; a second plate, the second plate is connected to the first connecting tube and is located on the first side of the first plate; a first elastic member, the two ends of the first elastic member are respectively connected to the first plate and the second plate; a movable member, the first end of the movable member is fixedly connected to the second plate, and the second end of the movable member passes through the second hole.

[0007] In a preferred technical solution of the above-mentioned connecting device, the first elastic member is arranged around the moving part.

[0008] In the preferred technical solution of the above-mentioned connecting device, the connecting device also includes a protective cover, the two ends of which are respectively connected to the first plate and the second plate, and the first elastic component is arranged in the protective cover. When the moving part moves, the first elastic component and the protective cover can both be deformed.

[0009] In a preferred technical solution of the above-mentioned connecting device, a limiting portion is provided on the movable member, and the limiting portion is configured to limit the distance that the movable member moves toward the first side of the first plate.

[0010] In the preferred technical solution of the above-mentioned connecting device, the movable part is a bolt, the limiting part is the head of the bolt, the head of the bolt is arranged on the second side of the first plate, and the rod of the bolt passes through the first plate and is fixedly connected to the second plate.

[0011] In the preferred technical solution of the above-mentioned connecting device, the connecting device also includes a plurality of correcting components, a plurality of through holes are arranged circumferentially on the first plate, the correcting components are arranged in the through holes, and are arranged to be able to move a preset amplitude along the radial direction of the through holes.

[0012] In the preferred technical solution of the above-mentioned connecting device, the correction component includes a floating member and a second elastic component, the two ends of the floating member are respectively arranged at the two ends of the through hole, the middle part of the floating member is arranged in the through hole, and the second elastic component is arranged in the through hole, and is arranged so that when the floating member moves along the radial direction of the through hole, the second elastic component is deformed.

[0013] In a preferred technical solution of the above-mentioned connecting device, the connecting device further includes a second connecting pipe, and the second connecting pipe is connected to the first connecting pipe in a detachable manner.

[0014] In a second aspect, the present invention further provides a battery pack cooling system, which includes a connecting device according to any one of the above-mentioned preferred technical solutions.

[0015] In a third aspect, the present invention also provides a vehicle, comprising the battery pack cooling system described in the above preferred technical solution.

[0016] When the above technical solution is adopted, the connecting device of the present invention includes: a first plate, a first hole and a second hole are provided on the first plate; a first connecting tube, the first connecting tube passes through the first hole; a second plate, the second plate is connected to the first connecting tube and is located on a first side of the first plate; a first elastic member, the two ends of the first elastic member are respectively connected to the first plate and the second plate; a movable member, one end of the movable member is fixedly connected to the second plate, and the other end of the movable member passes through the second hole. Based on the above structural arrangement, the movable member can move up and down relative to the second hole. When the connecting device at the battery pack end is connected to the connecting device of the present invention, the connecting device at the battery pack end squeezes the first connecting tube to move upward. During the upward movement, the first connecting tube drives the movable member to move upward. The distance between the lower end of the movable member and the connecting device at the battery pack end remains unchanged. Compared with the prior art in which the movable member moves downward, sufficient distance needs to be reserved between the lower end of the movable member and the battery pack end. However, the present invention does not require sufficient distance, which can reduce the size of the parts, achieve miniaturization and lightweight, and save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0018] Figure 1 It is a structural diagram of a connecting device in the prior art;

[0019] Figure 2 It is a structural diagram of the connecting device of the utility model;

[0020] Figure 3 This is a structural diagram of the connection device of the present invention from another perspective (dividing line A is the outer contour dividing line of the vehicle-end connection device and the package-end connection device);

[0021] Figure 4 This is a cross-sectional view of the first elastic member and the moving member of the connecting device of the present invention;

[0022] Figure 5 This is a cross-sectional view of the deviation-correcting component and the through hole of the connecting device of the present invention;

[0023] Reference numerals:

[0024] 1. First plate; 11. First hole; 12. Second hole; 13. Through hole; 14. Groove; 2. First connecting tube; 3. Second plate; 31. Fixed hole; 4. Moving part; 41. Head; 42. Rod; 5. Nut; 6. Second connecting tube; 7. Protective cover; 8. First elastic member; 9. Correction assembly; 91. Floating part; 911. First end; 912. Middle part; 913. Second end; 92. Second elastic member; 93. Mounting hole; 10. Upper plate; 101. Upper plate hole; 20. Upper connecting tube; 30. Lower plate; 40. Bolt; 401. End; 50. Nut; 60. Lower connecting tube; 70. Dust cover. DETAILED DESCRIPTION

[0025] The following describes preferred embodiments of the present invention with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely intended to illustrate the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art may adjust these embodiments as needed to suit specific applications.

[0026] It should be noted that in the description of this utility model, terms such as "upper," "lower," "front," "back," "left," and "right" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "connected," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed or detachable connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] See first Figure 1 , Figure 1 It is a connection device that can realize quick disassembly and quick replacement in the prior art, which includes an upper plate 10, an upper connecting pipe 20 passing through the upper plate hole 101 of the upper plate 10, and a lower plate 30 located below the upper plate 10. The upper plate 10 and the lower plate 30 are relatively parallel. The lower plate 30 is fixedly connected to the upper connecting pipe 20. A spring is provided between the upper plate 10 and the lower plate 30, and the spring is located inside the dust cover 70. Figure 1Not shown in the figure, the bolt 40 passes through the lower plate 30, the spring, and the upper plate 10 from bottom to top, and the upper end of the bolt 40 is fixed to the upper plate 10 by the nut 50. The upper end of the bolt 40 is fixedly connected to the upper plate 10 and cannot be moved.

[0029] Figure 1 The connection device shown in can be divided into a vehicle-end connection device and a package-end connection device. The boundary between the vehicle-end connection device and the package-end connection device can be referred to Figure 1The dividing line A in the figure is the dividing line of the connection interface between the outer contour of the upper connecting tube 20 and the outer contour of the lower connecting tube 60. The vehicle-end connecting device is above the dividing line A, and the package-end connecting device is below the dividing line A. The division of the dividing line A only represents the components shown on the outside, and does not mean that the internal components are also divided according to the dividing line A as belonging to the vehicle-end connecting device or the package-end connecting device. The vehicle-end connecting device is fixedly connected to the bottom of the vehicle, and the package-end connecting device is fixedly connected to the battery pack. When the battery pack is replaced and installed, the battery pack and the package-end connecting device need to be installed together. During the upward installation of the battery pack, the package-end connecting device will squeeze the upper connecting tube 20 upward. Since the upper plate 10 cannot move in the up and down directions, the upper connecting The tube 20 will move upward relative to the upper plate 10, and the lower plate 30 is fixedly connected to the upper connecting tube 20. The lower plate 30 will also move upward with the upper connecting tube 20. Since the nut 50 fixes the upper part of the bolt 40, the upper part of the bolt 40 cannot move. Therefore, in the process of the gradual upward movement of the package end connecting device, the lower end of the bolt 40 and the upper end of the package end connecting device are closer, that is, the lower end of the bolt moves downward relative to the package end connecting device. Under ideal conditions, during installation, the package end connecting device first contacts the vehicle end connecting device upward. At this time, the distance between the lower end face of the lower plate 30 and the upper end face of the end 401 is 0 mm, and then the battery pack continues to be installed upward to the ideal position. When the battery pack is in place, the spring is deformed. At this time The upper end surface of the end 401 of the bolt 40 is at a certain distance of 5mm (assumed distance) from the lower end surface of the lower plate 30. Assuming that the tolerance of the vehicle-end connecting device and the package-end connecting device is -5mm, that is, the size of the parts of the vehicle-end connecting device or the package-end connecting device is too small, and the absolute value of the total tolerance is exactly the same as the assumed distance. When the battery pack is installed in place, the package-end connecting device contacts the vehicle-end connecting device and will not move upward any further. The spring is not compressed. Assuming that the tolerance of the vehicle-end connecting device and the package-end connecting device is +5mm, that is, the size of the parts is too large, the package-end connecting device will contact the vehicle-end connecting device 5mm in advance, and the battery pack needs to move upward 10mm before it can be installed in place. That is, after the battery pack is installed in place, the spring It will be compressed by 10mm, and at this time, the upper end face of the end 401 of the bolt 40 is 10mm away from the lower end face of the lower plate 30; to avoid collision or contact between the lower end of the bolt 40 and the upper end face of the package end connecting device, when the package end connecting device and the vehicle end connecting device just come into contact (when the distance between the lower end face of the lower plate 30 and the upper end face of the end 401 is 0mm), the distance between the lower end face of the lower plate 30 and the upper end face of the package end connecting device is required to be more than 10mm. In short, sufficient distance must be left between the lower plate 30 and the package end connecting device, that is, there must be sufficient gap between the lower end of the bolt 40 and the package end connecting device. Since sufficient gap needs to be left, this has caused the parts to require larger sizes to meet the requirements to a certain extent, wasting costs.

[0030] In order to solve the above problems, the utility model provides a connecting device, such as Figures 2 to 4 As shown, the connecting device includes a first plate 1, a first hole 11 and a second hole 12 are provided on the first plate 1, a first connecting tube 2, the first connecting tube 2 passes through the first hole 11, and the first connecting tube 2 can move back and forth in the first hole 11 along the axis of the first hole 11; a second plate 3, the second plate 3 is connected to the first connecting tube 2, the second plate 3 is located on the first side of the first plate 1; the first side is at the bottom, a first elastic member 8, the two ends of the first elastic member 8 are respectively connected to the first plate 1 and the second plate 3; a moving member 4, one end of the moving member 4 is fixedly connected to the second plate 3, the other end of the moving member 4 passes through the second hole 12, and the moving member 4 can move relative to the second hole 12.

[0031] Specifically, the lower end of the movable part 4 is fixedly connected to the second plate 3, the upper end of the movable part 4 passes through the second hole 12, and the second plate 3 is fixedly connected to the first connecting tube 2. When the package end connecting device squeezes the first connecting tube 2 upward, the first connecting tube 2 will drive the second plate 3 to move upward, that is, the distance between the second plate 3 and the first plate 1 is reduced, and the first elastic member 8 is compressed. The lower end of the movable part 4 of the utility model is fixedly connected to the second plate 3, so the lower end of the movable part 4 will move upward with the second plate 3, and the upper end of the movable part 4 can move freely. Compared with the prior art, in the process of upward installation of the package end connecting device of the utility model, the distance between the upper end face of the package end connecting device and the lower end face of the movable part 4 is unchanged, and there is no need to reserve sufficient gap. In other words, the utility model reduces the size of the components, making the components lighter and more miniaturized, saving costs.

[0032] See next Figure 4 ,like Figure 4As shown, the first elastic member 8 is provided with around moving member 4. Specifically, the first elastic member 8 is a spring, and the spring is provided with around moving member 4, and moving member 4 can avoid spring from irregular deformation, moving member 4 is arranged on the inner circle of spring, and the inner circle of spring and the peripheral distance gap of moving member 4 are less, make spring only can produce the deformation that is compressed or stretched up and down, avoid deformation or tilting to produce deformation on its left and right directions, that is to say moving member 4 can play the effect of guiding, avoid spring from irregular deformation, certainly, this is only a kind of preferred arrangement mode, in other embodiments, the first elastic member 8 can also be not provided with around moving member 4, the first elastic member 8 and moving member 4 are left and right or are arranged side by side before and after; It can also be that the first elastic member 8 is a plurality of springs, and a plurality of springs are provided with around moving member 4 one week; It can also be that the first elastic member 8 is a leaf spring, and the leaf spring of sheet is vertically arranged, connects the first plate 1 and the second plate 3 respectively up and down, the first elastic member 8 can also be the sheet plate with elasticity, is vertically arranged, connects the first plate 1 and the second plate 3 respectively up and down, and those skilled in the art can set voluntarily according to actual conditions.

[0033] Furthermore, in this preferred embodiment, the connecting device further includes a protective cover 7, the ends of which are respectively connected to the first plate 1 and the second plate 3. A first elastic member 8 is disposed within the protective cover 7. During the movement of the movable member 4, both the first elastic member 8 and the protective cover 7 are capable of deforming. The provision of the protective cover 7 prevents dust and other debris from entering the interior of the first elastic member 8, thereby preventing it from affecting installation.

[0034] like Figure 4 As shown, a groove 14 is provided under the first plate 1, and the upper ends of the protective cover 7 and the first elastic member 8 are extended into the groove 14, and the groove 14 is connected to the second hole 12, but this is only a preferred setting method. It is also possible that the groove 14 is not provided under the first plate 1, and the protective cover 7 and the first elastic member 8 are both connected to the lower surface of the first plate 1. Those skilled in the art can set it according to actual conditions.

[0035] Continue reading Figure 4 ,like Figure 4 As shown, in this preferred embodiment, a limiting portion is provided on the moving member 4, and the limiting portion is configured to limit the distance that the moving member 4 moves toward the first side of the first plate 1, that is, Figure 4In the embodiment, the downward movement distance of the movable member 4 is limited. Specifically, the movable member 4 is a bolt, and the limiting portion is the head 41 of the bolt. The head 41 of the bolt is located on the second side of the first plate 1, that is, above the first plate 1. The rod 42 of the bolt passes through the first plate 1 and is fixedly connected to the second plate 3. The second plate 3 is provided with a fixing hole 31, and the fixing hole 31 is provided with an internal thread. The rod 42 is provided with an external thread. The second plate 3 and the rod 42 are connected by threads. A part of the rod 42 is located below the fixing hole 31 and is threadedly connected to the nut 5. Of course, the fixing hole 31 can also be omitted, and the lower part of the rod 42 can be directly welded to the second plate 3.

[0036] It should be noted that the present invention does not impose any limitation on the specific positions of the first side and the second side of the first plate 1 , as long as the first side and the second side are opposite to each other.

[0037] In other embodiments, the movable member 4 is merely a rod-shaped structure, which can move relative to the first hole 11. A limiting block is provided above the movable member 4, and the limiting portion is a limiting block. The movable member 4 can be fixedly connected to the second plate 3 by threads, or it can be connected by welding. Those skilled in the art can set it according to actual conditions.

[0038] See next Figure 2 and Figure 5 The connecting device also includes a plurality of correcting components 9. A plurality of through holes 13 are provided circumferentially of the first plate 1. The correcting components 9 are arranged in the through holes 13 and are configured to be able to move a preset amplitude along the radial direction of the through holes 13.

[0039] Specifically, if Figure 5As shown, the correction component 9 includes a floating member 91 and a second elastic member 92. The two ends of the floating member 91 are respectively located at the two ends of the through hole 13. The floating member 91 includes a first end 911 and a second end 913 located above and below, and a middle portion 912 located between the first end 911 and the second end 913. The middle portion of the floating member 91 is located in the through hole 13. The second elastic member 92 is located in the through hole 13. The second elastic member 92 is configured to deform when the floating member 91 moves in the radial direction of the through hole 13. The second elastic member 92 is a spring and surrounds the middle portion. 912 is set, the second elastic member 92 is thin at both ends and thick in the middle. When the floating member moves left and right, the spring is thicker in the middle and will be squeezed and deformed. In the actual installation process, the floating member 91 is fixed to the bottom of the vehicle by passing fasteners through the mounting hole 93. That is to say, multiple floating members 91 will not move left and right or front and back, and the first plate 1 will move left and right or front and back to absorb errors during installation. The movement of the first plate 1 will move the vehicle-end connecting device and the package-end connecting device left and right or front and back together, allowing errors caused by battery pack installation.

[0040] In other instances, the second elastic member 92 comprises a plurality of cylindrical springs, the axes of the cylindrical springs being arranged horizontally left and right, and the plurality of cylindrical springs being arranged around the middle portion 912, with one end of the cylindrical spring being connected to the inner wall of the through hole 13, and the other end being connected to the middle portion 912.

[0041] Furthermore, the connecting device also includes a second connecting tube 6, which is connected to the first connecting tube 2 in a detachable manner. The two second connecting tubes 6 are connected to the pipeline near the battery pack, and the two first connecting tubes 2 are connected to the pipelines at other positions of the vehicle. After the first connecting tube 2 and the second connecting tube 6 are both connected, the cooling fluid can circulate, that is, it flows through the pipeline near the battery pack to absorb heat, and then returns to the pipeline at other positions of the vehicle to dissipate heat and cool down, and then flows back to the pipeline near the battery pack; the second connecting tube 6 belongs to the pack end connecting device described above, and the second connecting tube 6 is fixedly connected to the battery pack (not shown in the figure) by a fixing component.

[0042] Figure 2 In the figure, the number of the first connecting tube 2, the second connecting tube 6, the first elastic member 8, the protective cover 7 and the moving part 4 are all two, but this is not restrictive, and those skilled in the art can set the specific value of the number according to actual conditions.

[0043] In a second aspect, the present invention further claims protection for a battery pack cooling system, which includes the connecting device described in any one of the above embodiments.

[0044] In a third aspect, the present invention also claims protection for a vehicle, which includes the battery pack cooling system described in the above example.

[0045] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A connecting device, characterized in that: The connecting device comprises: a first plate, wherein the first plate is provided with a first hole and a second hole; a first connecting pipe, the first connecting pipe passing through the first hole; a second plate connected to the first connecting pipe and located on a first side of the first plate; a first elastic member, wherein two ends of the first elastic member are respectively connected to the first plate member and the second plate member; A moving member, wherein a first end of the moving member is fixedly connected to the second plate member, and a second end of the moving member passes through the second hole.

2. The connecting device according to claim 1, characterized in that The first elastic member is disposed around the moving part.

3. The connecting device according to claim 1, characterized in that The connecting device further comprises a protective cover, Two ends of the protective cover are respectively connected to the first plate and the second plate. The first elastic component is arranged in the protective cover. When the moving part moves, the first elastic component and the protective cover can both be deformed.

4. The connecting device according to claim 1, characterized in that A limiting portion is provided on the moving member, and the limiting portion is configured to limit a distance that the moving member moves toward the first side of the first plate.

5. The connecting device according to claim 4, characterized in that The moving member is a bolt, the limiting portion is the head of the bolt, the head of the bolt is arranged on the second side of the first plate, and the rod of the bolt passes through the first plate and is fixedly connected to the second plate.

6. The connection device according to claim 1, characterized in that The connecting device further includes a plurality of deviation-correcting components, and a plurality of through holes are provided in the circumference of the first plate. The deviation-correcting component is arranged in the through hole and is configured to be able to move with a preset amplitude along the radial direction of the through hole.

7. The connection device according to claim 6, characterized in that The deviation-correcting assembly includes a floating member and a second elastic member. The two ends of the floating member are respectively arranged at the two ends of the through hole, and the middle part of the floating member is arranged in the through hole. The second elastic member is disposed in the through hole and is configured to deform when the floating member moves along a radial direction of the through hole.

8. The connecting device according to any one of claims 1 to 7, characterized in that The connecting device further includes a second connecting pipe, and the second connecting pipe is connected to the first connecting pipe in a detachable manner.

9. A battery pack cooling system, characterized in that: The battery pack cooling system includes the connecting device according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle includes the battery pack cooling system described in claim 9.

Images