Charging connection device

Abstract

The present invention provides a charging connection device, which includes a first connection end and a second connection end. The first connection end includes a plurality of copper busbar assemblies, and each copper busbar assembly includes a flexible copper busbar. The second connection end includes a plurality of rigid copper busbars, and a first surface of the rigid copper busbar is a curved surface. The first connection end and the second connection end are conductively connected by overlapping each flexible copper busbar on the first surface of a corresponding rigid copper busbar. The charging connection device of the present invention has reliable connection, a large contact area, the copper busbars are not easily damaged and oxidized, the operation and maintenance cost is low, the structure is simple, the processability is good, the manufacturing cost is low, and it has the self-adaptive ability of position deviation with multiple degrees of freedom, which can simplify the design of the self-adaptive structure.

Description

Technical Field

[0001] The present invention relates to the technical field of pantographs, and particularly relates to a charging connection device. Background Art

[0002] Pantographs have been widely used in the charging field of electric vehicles. With the development of intelligent charging technology, continuous adaptive improvements have been made to pantographs.

[0003] Currently, the copper bars of common pantographs mainly include simple copper bars and copper bars embedded with elastic conductive elements. The disadvantage of simple copper bars is that they are in rigid contact with the on-vehicle copper bar plane, which is essentially point contact and line contact, with relatively small current-carrying capacity and easy oxidation. The disadvantage of copper bars embedded with elastic conductive elements is that impact will occur during contact, resulting in peeling or failure of the elastic conductive elements, reducing efficiency and increasing operation and maintenance costs. In addition, the current adaptive scheme for the pantograph copper bar and the on-vehicle copper bar is relatively complex, requiring three additional rotational degrees of freedom to adapt to the deviation of different positions of the on-vehicle copper plate. The transmission path is long and the effect is poor. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a charging connection device, which has reliable connection, large contact area, the copper bar is not easily damaged and oxidized, low operation and maintenance costs, simple structure, good processability, low manufacturing cost, and has the ability to adapt to position deviation with multiple degrees of freedom itself, and can simplify the adaptive structure design.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A charging connection device includes a first connection end and a second connection end. The first connection end includes a plurality of copper bar assemblies, and each copper bar assembly includes a flexible copper bar. The second connection end includes a plurality of rigid copper bars. The first surface of the rigid copper bar is a curved surface, and the first connection end and the second connection end are conductively connected by overlapping each flexible copper bar on the first surface of a corresponding rigid copper bar.

[0007] The flexible copper bar includes a strip-shaped flexible conductive element and a plurality of copper blocks arranged at intervals along the length direction of the strip-shaped flexible conductive element.

[0008] The cross-section of the rigid copper bar corresponding to the first surface has an arc shape, and the flexible copper bar and the rigid copper bar are cross-overlapped.

[0009] The copper bar assembly further includes a rigid support, a first insulating member, and a second insulating member. One end of the rigid support is fixedly connected to and spaced from one end of the flexible copper bar through the first insulating member, and the other end of the rigid support is fixedly connected to and spaced from the other end of the flexible copper bar through the second insulating member.

[0010] Both the first insulating member and the second insulating member include a first connecting plate, a second connecting plate, and a limiting plate. The lower end of the first connecting plate is arc-shaped. The upper end of the second connecting plate is fitted and spliced with the lower end of the first connecting plate. The limiting plate is arranged on one side of the first connecting plate and the second connecting plate, and is rotatably connected to the first connecting plate through a first pin and rotatably connected to the second connecting plate through a second pin.

[0011] The first connection end further includes a rigid fixing frame for connecting a plurality of the copper busbar assemblies.

[0012] The first connection end further includes a plurality of guiding and limiting rods and a plurality of crimping holding springs corresponding to the plurality of copper busbar assemblies. Among them, the rigid fixing frame is connected to the rigid support members of the plurality of copper busbar assemblies one by one through the plurality of guiding and limiting rods, and the plurality of crimping holding springs are sleeved on the plurality of guiding and limiting rods one by one.

[0013] The first connection end further includes a movable assembly connected to the rigid fixing frame for realizing the up-and-down displacement of the plurality of copper busbar assemblies.

[0014] The movable assembly includes a double parallelogram mechanism, a power mechanism, and a gear set. The double parallelogram mechanism includes a first parallelogram movable frame and a second parallelogram movable frame arranged up and down. The bottom side of the first parallelogram movable frame is connected and fixed to the top side of the second parallelogram movable frame. The bottom side of the second parallelogram movable frame is connected to the rigid fixing frame. The gear set is arranged at the corner where any one group of the first parallelogram movable frame and the second parallelogram movable frame are connected. The corners of the first parallelogram movable frame and the second parallelogram movable frame except the corner where the gear set is arranged are all movably connected. The power mechanism is arranged on any two adjacent sides of any one parallelogram movable frame.

[0015] The first connection end is arranged on the charging device, and the second connection end is arranged on the device to be charged.

[0016] Advantages of the present invention:

[0017] The charging connection device of the present invention, its first connection end includes a plurality of copper busbar assemblies, the copper busbar assemblies include flexible copper busbars, its second connection end includes a plurality of rigid copper busbars, the first surface of the rigid copper busbar is a curved surface, and by overlapping each flexible copper busbar on the first surface of a corresponding rigid copper busbar, the electrical connection between the first connection end and the second connection end is realized. Thus, the connection is reliable, the contact area is large, the copper busbars are not easily damaged and oxidized, the operation and maintenance cost is low, the structure is simple, the processability is good, the manufacturing cost is low, and it has the self-adaptive ability of position deviation with multiple degrees of freedom, which can simplify the self-adaptive structure design. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the copper busbar overlapping structure in the charging connection device according to an embodiment of the present invention;

[0019] Figure 2 Schematic diagram of the structure of the flexible copper busbar according to an embodiment of the present invention;

[0020] Figure 3 Schematic diagram of the structure of the rigid copper busbar according to an embodiment of the present invention;

[0021] Figure 4 Schematic diagram of the copper busbar overlapping when the flexible copper busbar is not pressed according to an embodiment of the present invention;

[0022] Figure 5 Schematic diagram of the copper busbar overlapping when the flexible copper busbar is pressed according to an embodiment of the present invention;

[0023] Figure 6 Schematic diagram of the structure of the copper busbar assembly according to an embodiment of the present invention;

[0024] Figure 7 Schematic diagram of the structure of the first and second insulating parts according to an embodiment of the present invention;

[0025] Figure 8 Schematic diagram of the first connection end and its connection with the second connection end according to an embodiment of the present invention;

[0026] Figure 9 Schematic diagram of the first connection end and its connection with the second connection end according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0028] AsFigures 1 to 9 As shown in the figure, the charging connection device of the embodiment of the present invention includes a first connection end and a second connection end. The first connection end includes a plurality of copper busbar assemblies 1, and the copper busbar assembly 1 includes a flexible copper busbar 2. The second connection end includes a plurality of rigid copper busbars 3. The first surface of the rigid copper busbar 3 is a curved surface. The first connection end and the second connection end are conductively connected by overlapping each flexible copper busbar 2 on the first surface of a corresponding rigid copper busbar 3.

[0029] In an embodiment of the present invention, the first connection end may be disposed on a charging device, such as a charging pile, and the second connection end may be disposed on a device to be charged, such as a vehicle. The present invention can be understood and implemented based on the connection between the first connection end of the charging pile and the second connection end of the vehicle to realize the charging of the vehicle by the charging pile.

[0030] In an embodiment of the present invention, as Figure 2 shown, the flexible copper busbar 2 includes a strip-shaped flexible conductive element 4 and a plurality of copper blocks 5 arranged at intervals along the length direction of the strip-shaped flexible conductive element 4. In an embodiment of the present invention, the flexible conductive element may be a copper braid or a flat cable or a copper sheet, etc. The connection form between the copper block 5 and the strip-shaped flexible conductive element 4 is not limited and may be welding or crimping, etc. It should be understood that if the copper block 5 is welded to the strip-shaped flexible conductive element 4, only a plurality of copper blocks 5 may be welded on the surface in contact with the rigid copper busbar 3. If the copper block 5 is crimped to the strip-shaped flexible conductive element 4, a plurality of copper blocks 5 may be crimped on both surfaces. In the embodiment of the present invention, the size of the copper block can be customized according to the magnitude of the charging current, which not only ensures normal conduction but also avoids waste.

[0031] In an embodiment of the present invention, as Figure 1 , Figures 3 to 5 shown, the side of the cross-section of the rigid copper busbar 3 corresponding to the first surface is arc-shaped, and the flexible copper busbar 2 and the rigid copper busbar 3 are cross-lapped. When the flexible copper busbar 2 and the rigid copper busbar 3 are overlapped, as Figure 5 shown, under the action of the downward pressure, the flexible copper busbar 2 will deform and closely adhere to the first surface of the rigid copper busbar 3. Since the first surface is a curved surface, the contact area is increased, the current-carrying capacity is increased, and it is not easily damaged, greatly reducing the operation and maintenance and manufacturing costs. And when there are angular and displacement deviations of the rigid copper busbar 3, because the flexible copper busbar 2 is flexible and the surface of the rigid copper busbar 3 it contacts is a curved surface, the flexible copper busbar 2 itself has two rotational degrees of freedom, so as to adapt to the above deviations. The two rotational degrees of freedom are, as Figure 5 shown, when the flexible copper busbar 2 and the rigid copper busbar 3 are perpendicularly crossed, the flexible copper busbar 2 can rotate in a plane parallel to the length direction of the flexible copper busbar 2 and perpendicular to the length direction of the rigid copper busbar 3, and can also rotate in a plane parallel to the length direction of the flexible copper busbar 2 and parallel to the length direction of the rigid copper busbar 3.

[0032] In other embodiments of the present invention, the side of the cross-section of the rigid copper bar 3 corresponding to the first face may also be other special shapes such as polygons, as long as it can ensure better contact between the flexible copper bar 2 and the rigid copper bar 3 and enable the flexible copper bar 2 to have multiple rotational degrees of freedom itself.

[0033] In one embodiment of the present invention, as Figure 6 shown, the copper bar assembly 1 may further include a rigid support member 6, a first insulating member 7 and a second insulating member 8. One end of the rigid support member 6 is fixedly connected and spaced apart from one end of the flexible copper bar 2 through the first insulating member 7, and the other end of the rigid support member 6 is fixedly connected and spaced apart from the other end of the flexible copper bar 2 through the second insulating member 8. The rigid support member 6 and the two insulating members can ensure the rigidity and safety of the flexible copper bar 2 during the pressing process. The structural shapes of the rigid support member 6 and the two insulating members are not limited, and they can be special-shaped parts, profile parts or standard parts, etc. The material of the rigid support member 6 can be selected from conductive or insulating and rigid materials, such as aluminum profiles, and the insulating members are made of insulating materials.

[0034] In one embodiment of the present invention, as Figure 7 shown, both the first insulating member and the second insulating member may include a first connecting plate 9, a second connecting plate 10 and a limiting plate 11. The lower end of the first connecting plate 9 is arc-shaped, the upper end of the second connecting plate 10 is fitted and spliced with the lower end of the first connecting plate 9, and the limiting plate 11 is arranged on one side of the first connecting plate 9 and the second connecting plate 10, and is rotatably connected to the first connecting plate 9 through a first pin 12 and rotatably connected to the second connecting plate 10 through a second pin 13. Through the above structure of the insulating member, the first connecting plate and the second connecting plate can rotate relative to each other. For example, Figure 7 shown, the second connecting plate 10 can rotate relative to the first connecting plate 9 with the first pin 12 as the rotation center. Thus, the flexible copper bar 2 is increased by one rotational degree of freedom.

[0035] In one embodiment of the present invention, as Figure 8 shown, the first connection end may further include a rigid fixing frame 14, and the rigid fixing frame 14 is used to connect a plurality of copper bar assemblies 1. Figure 8 Taking the connection of four copper bar assemblies as an example, in a specific embodiment, the flexible copper bar 2 is at the charging pile end, herein called the male end copper bar, and the rigid copper bar 3 is at the vehicle end, herein called the female end copper bar. The four groups of flexible copper bars 2 and rigid copper bars 3 are respectively used as the positive terminal, negative terminal, signal terminal and grounding terminal. As Figure 8As shown, the first connection end may further include a plurality of guiding and limiting rods 15 and a plurality of crimping and holding springs 16 corresponding to the plurality of copper busbar assemblies 1. Among them, the rigid fixing frame 14 is connected to the rigid support members 6 of the plurality of copper busbar assemblies 1 one-to-one through the plurality of guiding and limiting rods 15, and the plurality of crimping and holding springs 16 are sleeved on the plurality of guiding and limiting rods 15 one-to-one. By providing the guiding and limiting rods 15 and the crimping and holding springs 16, the corresponding copper busbar assemblies 1 can be displaced vertically, and the horizontal displacement is restricted. When the corresponding rigid copper busbar 3 is displaced vertically, the vertical displacement of the rigid copper busbar 3 is compensated by the crimping and holding spring above the copper busbar assembly 1, so that the flexible copper busbar 2 is closely attached to the rigid copper busbar 3, preventing arcing between the two copper busbars and ensuring reliable contact of the copper busbars.

[0036] In an embodiment of the present invention, as Figure 9 shown, the first connection end further includes a movable assembly. The movable assembly is connected to the rigid fixing frame 14 and is used to realize the vertical displacement of the plurality of copper busbar assemblies 1. Specifically, the movable assembly includes a double parallelogram mechanism, a power mechanism 17 and a gear set. The double parallelogram mechanism includes a first parallelogram movable frame 18 and a second parallelogram movable frame 19 arranged up and down. One side of the bottom of the first parallelogram movable frame 18 is connected and fixed to one side of the top of the second parallelogram movable frame 19. One side of the bottom of the second parallelogram movable frame 19 is connected to the rigid fixing frame 14. The gear set is arranged at the corner where any group of the first parallelogram movable frame 18 and the second parallelogram movable frame 19 are connected. The gear set includes a first gear 20 and a second gear 21 that are meshed with each other. For example, as Figure 9 shown, the first gear 20 may be arranged at the lower right corner of the first parallelogram movable frame, and the second gear 21 may be arranged at the upper right corner of the second parallelogram movable frame. The corners of the first parallelogram movable frame 18 and the second parallelogram movable frame 19 except the corners where the gear set is arranged are movably connected. The power mechanism 17 is arranged on any two adjacent sides of any parallelogram movable frame. For example, as Figure 9 shown, the power mechanism 17 is arranged on the top side and the right side of the first parallelogram movable frame 18. The power mechanism 17 can be a self-driven telescopic rod. By stretching and pulling the two adjacent sides of the parallelogram movable frame connected at both ends, the deformation of the parallelogram movable frame is realized, and the other parallelogram movable frame is driven to deform synchronously through the gear set. In an embodiment of the present invention, the shapes and sizes of the first parallelogram movable frame 18 and the second parallelogram movable frame 19 are the same, and the specifications of the first gear 20 and the second gear 21 are the same. By providing the above-mentioned double parallelogram mechanism and gear set, the contact surface of the flexible copper busbar 2 can always be parallel to the ground, and it can be ensured that during the operation of the double parallelogram, the quadrilaterals operate synchronously, so that the copper busbar assembly 1 has no displacement in the horizontal direction, effectively ensuring the service life of the copper busbar, and the structure is simple and reliable.

[0037] It should be noted that in the embodiments of the present invention, there are multiple copper row assemblies 1 at the first connection end, that is, the rigid fixing frame 14 is connected to multiple copper row assemblies 1. Based on the respective structures of the above copper row assemblies 1, and their connection structures and cooperation relationships with components such as the rigid fixing frame 14, each flexible copper row 2 can individually adapt to the corresponding rigid copper row 3.

[0038] In one embodiment of the present invention, as Figure 1 and Figure 3 shown, the second connection end may further include a third insulating member 22 and a fourth insulating member 23. Both ends of the rigid copper row 3 are insulated from the device to be charged through the third insulating member 22 and the fourth insulating member 23 respectively.

[0039] In summary, for the charging connection device according to the embodiments of the present invention, its first connection end includes multiple copper row assemblies, the copper row assemblies include flexible copper rows, its second connection end includes multiple rigid copper rows, the first surface of the rigid copper row is a curved surface, and the first connection end and the second connection end are conductively connected by overlapping each flexible copper row on the first surface of a corresponding rigid copper row. Thus, the connection is reliable, the contact area is large, the copper rows are not easily damaged and oxidized, the operation and maintenance cost is low, the structure is simple, the processability is good, the manufacturing cost is low, and it has the position deviation self-adaptive ability with multiple degrees of freedom itself, which can simplify the self-adaptive structure design.

[0040] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "multiple" is two or more, unless otherwise specifically defined.

[0041] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the horizontal height of the first feature is less than that of the second feature.

[0043] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "exemplifications", "specific exemplifications", or "some exemplifications", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or exemplification are included in at least one embodiment or exemplification of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or exemplification. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or exemplifications. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or exemplifications described in this specification and the features of different embodiments or exemplifications.

[0044] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A charging connection device, characterized in that, It includes a first connection end and a second connection end. The first connection end includes a plurality of copper busbar assemblies, and each copper busbar assembly includes a flexible copper busbar. The second connection end includes a plurality of rigid copper busbars, and the first surface of the rigid copper busbar is a curved surface. The first connection end and the second connection end are conductively connected by overlapping each flexible copper busbar on the first surface of a corresponding rigid copper busbar. The copper busbar assembly further includes a rigid support, a first insulating member, and a second insulating member. One end of the rigid support is fixedly connected to and spaced from one end of the flexible copper busbar through the first insulating member, and the other end of the rigid support is fixedly connected to and spaced from the other end of the flexible copper busbar through the second insulating member. Both the first insulating member and the second insulating member include a first connecting plate, a second connecting plate, and a limiting plate. The lower end of the first connecting plate is arc-shaped, the upper end of the second connecting plate is fitted and spliced with the lower end of the first connecting plate, and the limiting plate is arranged on one side surface of the first connecting plate and the second connecting plate and is rotatably connected to the first connecting plate through a first pin and rotatably connected to the second connecting plate through a second pin.

2. The charging connection device according to claim 1, characterized in that, The flexible copper busbar includes a strip-shaped flexible conductive element and a plurality of copper blocks arranged at intervals along the length direction of the strip-shaped flexible conductive element.

3. The charging connection device according to claim 2, wherein The side of the cross-section of the rigid copper busbar corresponding to the first surface is arc-shaped, and the flexible copper busbar and the rigid copper busbar are cross-lapped.

4. The charging connection device according to any one of claims 1-3, characterized in that, The first connection end further includes a rigid fixing frame for connecting a plurality of the copper busbar assemblies.

5. The charging connection device according to claim 4, wherein, The first connection end further includes a plurality of guiding and limiting rods and a plurality of crimping and holding springs corresponding to the plurality of copper busbar assemblies. Among them, the rigid fixing frame is connected to the rigid supports of the plurality of copper busbar assemblies one by one through the plurality of guiding and limiting rods, and the plurality of crimping and holding springs are sleeved on the plurality of guiding and limiting rods one by one.

6. The charging connection device according to claim 5, wherein The first connection end further includes a movable assembly connected to the rigid fixing frame, and the movable assembly is used to realize the up and down displacement of the plurality of copper busbar assemblies.

7. The charging connection device according to claim 6, characterized in that, The movable assembly includes a double parallelogram mechanism, a power mechanism, and a gear set. The double parallelogram mechanism includes a first parallelogram movable frame and a second parallelogram movable frame arranged up and down. One bottom side of the first parallelogram movable frame is connected and fixed to the top side of the second parallelogram movable frame. One bottom side of the second parallelogram movable frame is connected to the rigid fixing frame. The gear set is arranged at the corner where any group of the first parallelogram movable frame and the second parallelogram movable frame are connected. The corners of the first parallelogram movable frame and the second parallelogram movable frame except the corners where the gear set is arranged are all movably connected, and the power mechanism is arranged on any two adjacent sides of any parallelogram movable frame.

8. The charging connection device according to claim 1, wherein The first connection end is arranged on a charging device, and the second connection end is arranged on a device to be charged.

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