Double-pole double-throw switch

Abstract

The embodiment of the invention provides a double-pole-double-throw switch, and relates to the technical field of switching devices. The double-pole-double-throw switch comprises a base, a moving contact structure and a static contact group, wherein the moving contact structure is rotatably arranged on the base; the static contact group comprises two first static contacts and two second static contacts, and the two first static contacts and the two second static contacts are used for being arranged in a loop; the moving contact structure is used for rotating relative to the base under the action of external force so as to connect and conduct the two first static contacts and the two second static contacts respectively, so that loops are connected in parallel to form a first voltage platform; or, one of the first static contacts and one of the second static contacts are connected and conducted, so that the loops are connected in series to form a second voltage platform. The double-pole-double-throw switch can be switched to different voltage platforms according to different charging scenes, so that the architecture of a charging system is simplified, the charging efficiency is improved, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of switch electric appliances, in particular to a double-pole double-throw switch. BACKGROUND

[0002] With the rapid development of the electric vehicle industry, charging efficiency and charging facility compatibility have become key technical bottlenecks restricting its market popularization. At present, based on innovative battery voltage dynamic reconstruction technology, high-efficiency charging solutions across voltage platforms have been realized. Taking the application of 800V high-voltage platform electric vehicles on 400V charging facilities as an example, compared with traditional 400V systems, 800V systems can halve the working current while maintaining the same performance indicators, thereby effectively reducing power loss and improving charging rate.

[0003] In the prior art, a boost converter is usually used to achieve high-efficiency charging across different voltage platforms, such as boosting 400V voltage to 800V to achieve compatibility charging. However, this solution has high system cost, and the charging rate is limited by the power capacity of the boost converter. While using a boost conversion scheme based on a traction inverter, the cost is reduced to some extent, but additional hardware modules need to be installed, resulting in complex system architecture and affecting charging efficiency. SUMMARY

[0004] The purpose of the present application is to provide a double-pole double-throw switch that can switch to different voltage platforms according to different charging scenarios, thereby simplifying the charging system architecture, improving charging efficiency, and reducing cost.

[0005] Embodiments of the present application are implemented as follows: An embodiment of the present application provides a double-pole double-throw switch for switching series or parallel connection of a circuit, the double-pole double-throw switch comprising: a base; a movable contact structure rotatably arranged on the base; and a stationary contact group comprising two first stationary contacts and two second stationary contacts, the two first stationary contacts and the two second stationary contacts being arranged on the base and configured to be arranged in the circuit; wherein the movable contact structure is configured to rotate relative to the base under the action of an external force to connect and conduct the two first stationary contacts and the two second stationary contacts respectively, so that the circuit is connected in parallel to form a first voltage platform, or to connect and conduct one of the first stationary contacts and one of the second stationary contacts, so that the circuit is connected in series to form a second voltage platform.

[0006] In an optional embodiment, the movable contact structure comprises a movable contact support, a first movable contact group, and a second movable contact group, the movable contact support is rotatably arranged on the base, the first movable contact group and the second movable contact group are arranged on the movable contact support, and the first movable contact group and the second movable contact group are arranged in a spaced manner; The movable contact support is configured to rotate relative to the base under an external force to connect and conduct two first static contacts by the first movable contact group, and to connect and conduct two second static contacts by the second movable contact group, or to connect and conduct one of the first static contacts and one of the second static contacts by the first movable contact group or the second movable contact group.

[0007] In an optional embodiment, the movable contact support comprises a first rotating plate, a connecting shaft, and a second rotating plate connected in sequence, the first rotating plate and the second rotating plate are arranged in a spaced manner, and a slot is formed between the first rotating plate, the connecting shaft, and the second rotating plate; one end of two first static contacts and one end of two second static contacts are arranged in the slot; The first movable contact group and the second movable contact group are arranged on one side of the first rotating plate close to the slot; and / or, The first movable contact group and the second movable contact group are arranged on one side of the second rotating plate close to the slot.

[0008] In an optional embodiment, the first rotating plate is provided with a first mounting slot and a second mounting slot, the first mounting slot and the second mounting slot are arranged in a spaced manner and are in communication with the slot, the first movable contact group is arranged in the first mounting slot, and the second movable contact group is arranged in the second mounting slot; and / or, The second rotating plate is provided with a third mounting slot and a fourth mounting slot, the third mounting slot and the fourth mounting slot are arranged in a spaced manner and are in communication with the slot, the first movable contact group is arranged in the third mounting slot, and the second movable contact group is arranged in the fourth mounting slot.

[0009] In an optional embodiment, the first movable contact group comprises a first movable contact and a first elastic contact finger, the first movable contact is arranged on the movable contact support and is configured to contact the first static contact or the second static contact, the first elastic contact finger is arranged on the movable contact support and abuts against the first movable contact, and is configured to apply a pre-pressure to the first movable contact; and / or, The second moving contact group includes a second moving contact and a second elastic contact finger. The second moving contact is disposed on the moving contact support and is used to contact the second stationary contact or the first stationary contact. The second elastic contact finger is disposed on the moving contact support and abuts against the second moving contact, and is used to apply pre-pressure to the second moving contact.

[0010] In an optional embodiment, the two first stationary contacts are arranged perpendicularly to each other, and the two second stationary contacts are arranged perpendicularly to each other; and / or, One of the first stationary contacts and one of the second stationary contacts are symmetrically arranged, and another of the first stationary contacts and another of the second stationary contacts are symmetrically arranged.

[0011] In an optional embodiment, the top of the base is provided with a receiving groove, and the moving contact structure is rotatably disposed in the receiving groove.

[0012] In an optional embodiment, one of the bottom wall of the receiving groove and the moving contact structure is provided with a rotating boss, and the other of the bottom wall of the receiving groove and the moving contact structure is provided with a rotating groove, and the rotating boss is disposed in the rotating groove.

[0013] In an optional embodiment, the side of the rotating boss is provided with a first limiting protrusion, and the side wall of the rotating groove is provided with a second limiting protrusion. The first limiting protrusion is used to abut against and cooperate with the second limiting protrusion.

[0014] In an optional embodiment, the double-pole double-throw switch further includes a wear-resistant bushing, which is embedded in the rotating groove and sleeved on the rotating boss.

[0015] In an optional embodiment, the side of the base has two first sockets and two second sockets; Two first stationary contacts are respectively inserted into two first sockets; two second stationary contacts are respectively inserted into two second sockets.

[0016] In an optional embodiment, the side of the base includes a first side, a second side, and a third side connected in sequence, with the first side and the third side disposed opposite to each other; One of the first sockets is located on the first side, one of the second sockets is located on the third side, and another first socket and another second socket are both located on the second side, with the other first socket and the other second socket spaced apart.

[0017] In an optional embodiment, the double-pole double-throw switch further comprises a driving device and a linkage mechanism, both of which are arranged on the base, and the driving device, the linkage mechanism and the movable contact structure are sequentially connected, and the driving device is configured to drive the movable contact structure to rotate relative to the base.

[0018] In an optional embodiment, the linkage mechanism comprises a first fixed plate, a linkage frame and at least two linkage assemblies, the first fixed plate is arranged on the base, the linkage frame is arranged through the first fixed plate, and both ends of the linkage frame are connected with the driving device and the movable contact structure respectively; the at least two linkage assemblies are rotatably connected to the linkage frame, and the at least two linkage assemblies are arranged at intervals.

[0019] In an optional embodiment, the linkage assembly comprises a linkage rod, a first limiting plate, a second limiting plate, a limiting column and an elastic member, the linkage rod is rotatably connected to the linkage frame, the first limiting plate is fixedly arranged on one end of the linkage rod close to the linkage frame, and the second limiting plate is slidably arranged on one end of the linkage rod away from the linkage frame; the limiting column is fixedly arranged on one end of the linkage rod away from the linkage frame and located on a side of the second limiting plate away from the first limiting plate; and the elastic member is sleeved on the linkage rod, and both ends of the elastic member abut against the first limiting plate and the second limiting plate.

[0020] In an optional embodiment, the first fixed plate is provided with a first arc-shaped hole and a second arc-shaped hole, a side of the movable contact structure close to the first fixed plate is provided with a first arc-shaped groove and a second arc-shaped groove, the first arc-shaped groove is arranged correspondingly to the first arc-shaped hole, and the second arc-shaped groove is arranged correspondingly to the second arc-shaped hole; a side of the linkage frame close to the movable contact structure is provided with a first rotation shaft and a second rotation shaft, the first rotation shaft is arranged through the first arc-shaped hole and arranged in the first arc-shaped groove, and the second rotation shaft is arranged through the second arc-shaped hole and arranged in the second arc-shaped groove.

[0021] In an optional embodiment, the first fixed plate is provided with a first arc-shaped hole and a second arc-shaped hole, a side of the movable contact structure close to the first fixed plate is provided with a first arc-shaped groove and a second arc-shaped groove, the first arc-shaped groove is arranged correspondingly to the first arc-shaped hole, and the second arc-shaped groove is arranged correspondingly to the second arc-shaped hole; the second static contact is provided with a second insertion end, the second insertion end is configured to contact the movable contact structure, and the second insertion end is a frustoconical structure.

[0022] In an optional embodiment, the taper angle of the frustoconical structure is 15°-25°.

[0023] The beneficial effects of the embodiments of the present application include: The double-pole double-throw switch provided by the embodiments can connect and conduct two first static contacts and two second static contacts by driving the movable contact structure to rotate relative to the base by an external force in a low-voltage charging scenario, so as to realize parallel connection of the loop and form a first voltage platform, which can be understood as a relatively low-voltage charging platform. Thus, the vehicle can be adapted to a low-voltage charger, and the maximum current can be obtained. In a high-voltage charging scenario, the movable contact structure is also driven to rotate relative to the base by an external force, one of the first static contacts and one of the second static contacts are connected and conducted, the loop is connected in series, and a second voltage platform is formed, which can be understood as a relatively high-voltage charging platform, so as to improve the charging speed of the vehicle. Therefore, the double-pole double-throw switch can change the series-parallel connection mode of the circuit according to different charging scenarios, realize switching of different voltage platforms for charging, and does not need to use a boost converter or a traction inverter, so as to simplify the charging system architecture, improve the charging efficiency, and reduce the cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0025] Figure 1 The structural schematic diagram of the double-pole double-throw switch provided by the embodiments of the present application is shown in the figure. Figure 2 The exploded view of the double-pole double-throw switch provided by the embodiments of the present application is shown in the figure. Figure 3 The partial structural schematic diagram of the double-pole double-throw switch provided by the embodiments of the present application is shown in the figure. Figure 4 The circuit connection schematic diagram of the double-pole double-throw switch provided by the embodiments of the present application for realizing parallel connection of the loop is shown in the figure. Figure 5 The circuit connection schematic diagram of the double-pole double-throw switch provided by the embodiments of the present application for realizing series connection of the loop is shown in the figure. Figure 6 The structural schematic diagram of the first perspective view of the movable contact structure provided by the embodiments of the present application is shown in the figure. Figure 7 The structural schematic diagram of the second perspective view of the movable contact structure provided by the embodiments of the present application is shown in the figure. Figure 8 The structural schematic diagram of the first movable contact group and the second movable contact group provided by the embodiments of the present application is shown in the figure. Figure 9 A third perspective view of the movable contact structure according to an embodiment of the present application is shown in FIG. 8. Figure 10 A perspective view of the base according to an embodiment of the present application is shown in FIG. 9. Figure 11 A perspective view of the first and second stationary contacts according to an embodiment of the present application is shown in FIG. 10. Figure 12 A first perspective view of the linkage mechanism according to an embodiment of the present application is shown in FIG. 11. Figure 13 A second perspective view of the linkage mechanism according to an embodiment of the present application is shown in FIG. 12. Figure 14 A perspective view of the driving device according to an embodiment of the present application is shown in FIG. 13.

[0026] Figure legend: 100 - double-pole double-throw switch; 10 - base; 11 - accommodating groove; 12 - rotating boss; 121 - first limiting protrusion; 13 - first insertion hole; 14 - second insertion hole; 15 - first side; 16 - second side; 17 - third side; 18 - partition; 20 - movable contact structure; 21 - movable contact support; 211 - first rotating plate; 2111 - first mounting groove; 2112 - second mounting groove; 212 - second rotating plate; 2121 - third mounting groove; 2122 - fourth mounting groove; 213 - connecting shaft; 214 - insertion slot; 22 - first movable contact group; 221 - first movable contact; 222 - first elastic contact finger; 23 - second movable contact group; 231 - second movable contact; 232 - second elastic contact finger; 24 - rotating groove; 241 - second limiting protrusion; 25 - first arc-shaped groove; 26 - second arc-shaped groove; 30 - stationary contact group; 31 - first stationary contact; 311 - first insertion end; 32 - second stationary contact; 321 - second insertion end; 40 - driving device; 41 - second fixed plate; 42 - third fixed plate; 43 - second connecting column; 44 - motor; 45 - transmission mechanism; 451 - clamping slot; 50 - linkage mechanism; 51 - first fixed plate; 511 - first arc-shaped hole; 512 - second arc-shaped hole; 52 - linkage frame; 521 - first rotating shaft; 522 - second rotating shaft; 523 - clamping protrusion; 53 - linkage assembly; 531 - first limiting plate; 532 - second limiting plate; 533 - linkage rod; 534 - limiting column; 535 - elastic member; 54 - first connecting column; 60 - housing; 61 - middle cover; 62 - upper cover. DETAILED DESCRIPTION

[0027] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative work fall within the scope of protection of the present application.

[0029] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] As described in the background, the prior art generally adopts a boost converter to achieve efficient charging across different voltage platforms, such as boosting 400V voltage to 800V to achieve compatible charging. However, this solution has a high system cost, and the charging rate is limited by the power capacity of the boost converter. Another solution is to use a boost conversion based on a traction inverter, which reduces the cost to some extent, but requires additional hardware modules, resulting in a complex system architecture and affecting charging efficiency.

[0034] Based on this, please refer to Figures 1-14 Embodiments of the present application provide a double-pole double-throw switch 100 that can effectively improve the above-mentioned technical problems, which is used to switch the series or parallel connection of the circuit, and can switch to different voltage platforms according to different charging scenarios, thereby simplifying the charging system architecture, improving the charging efficiency, and reducing the cost. The double-pole double-throw switch 100 will be described in detail below.

[0035] Please refer to Figures 1-3 , Figure 1 The structural schematic diagram of the double-pole double-throw switch 100 provided by the present embodiment is shown in Figure 2 The exploded view of the double-pole double-throw switch 100 provided by the present embodiment is shown in Figure 3 The partial structural schematic diagram of the double-pole double-throw switch 100 provided by the present embodiment is shown in

[0036] In combination with Figures 1-3 The double-pole double-throw switch 100 includes a base 10, a movable contact structure 20, and a static contact group 30. The movable contact structure 20 is rotatably arranged on the base 10. The static contact group 30 includes two first static contacts 31 and two second static contacts 32, both of which are arranged on the base 10 and are used to be arranged in the circuit. The movable contact structure 20 is used to rotate relative to the base 10 under the action of an external force to connect and conduct the two first static contacts 31 and the two second static contacts 32 respectively, so that the circuit is in parallel to form a first voltage platform; or, connect and conduct one of the first static contacts 31 and one of the second static contacts 32, so that the circuit is in series to form a second voltage platform.

[0037] Specifically, please refer to Figure 4 and Figure 5 , Figure 4 The circuit connection schematic diagram of the double-pole double-throw switch 100 provided by the present embodiment for switching to realize parallel connection of the circuit is shown in Figure 5A circuit connection schematic diagram for realizing circuit series connection by switching of the double-pole double-throw switch 100 provided in this embodiment is shown in FIG. 1. It should be noted that this embodiment takes a 400V voltage charging platform (first voltage platform) and an 800V voltage charging platform (second voltage platform) as examples to describe the switching working principle of the double-pole double-throw switch 100. It can be understood that the value of the first voltage platform is less than that of the second voltage platform. Of course, in other embodiments, the first voltage platform and the second voltage platform can also be charging platforms with other voltage values.

[0038] In combination with Figures 1-5 , in a low-voltage charging scenario, the two first static contacts 31 are connected and conducted and the two second static contacts 32 are connected and conducted by driving the movable contact structure 20 to rotate a certain angle relative to the base 10 under the action of external force, so as to realize parallel connection of the loop to form a first voltage platform, which can be understood as a relatively low-voltage charging platform. Thus, the vehicle can be adapted to a low-voltage charger and maximum current can be obtained. For example, in Figure 4 , the double-pole double-throw switch 100 can connect the contact A1 and the contact A2 in the loop, and at the same time connect the contact B1 and the contact B2, so as to realize parallel connection of the two 400V battery packs, i.e., the first voltage platform is a 400V voltage platform. In a high-voltage charging scenario, one of the first static contacts 31 and one of the second static contacts 32 are connected and conducted by driving the movable contact structure 20 to rotate a certain angle relative to the base 10 under the action of external force, so as to realize series connection of the loop to form a second voltage platform, which can be understood as a relatively high-voltage charging platform, thereby improving the charging speed of the vehicle. For example, in Figure 5 , the double-pole double-throw switch 100 can connect the contact A1 and the contact B1 in the loop, so as to realize series connection of the two 400V battery packs, i.e., the second voltage platform is an 800V voltage platform.

[0039] Therefore, the double-pole double-throw switch 100 can change the series-parallel connection mode of the circuit according to different charging scenarios, realize switching of different voltage platforms for charging, and does not need to use a boost converter or a traction inverter, thereby simplifying the charging system architecture, improving the charging efficiency, and reducing the cost.

[0040] Please refer to Figure 6 and Figure 7 , Figure 6 A structure schematic diagram of the first perspective of the movable contact structure 20 provided in this embodiment is shown in FIG. 2. Figure 7 A structure schematic diagram of the second perspective of the movable contact structure 20 provided in this embodiment is shown in FIG. 3.

[0041] In combination with Figure 2 , Figure 6 and Figure 7Specifically, the movable contact structure 20 comprises a movable contact support 21, a first movable contact group 22 and a second movable contact group 23. The movable contact support 21 is rotatably arranged on the base 10. The first movable contact group 22 and the second movable contact group 23 are arranged on the movable contact support 21, and the first movable contact group 22 and the second movable contact group 23 are arranged at intervals. The movable contact support 21 is used to rotate relative to the base 10 under the action of an external force, so as to connect and conduct two first static contacts 31 through the first movable contact group 22, and simultaneously connect and conduct two second static contacts 32 through the second movable contact group 23; or connect and conduct one of the first static contacts 31 and one of the second static contacts 32 through the first movable contact group 22 or the second movable contact group 23.

[0042] It should be noted that when the movable contact support 21 is rotated to a certain angle, the first movable contact group 22 can be in contact with two first static contacts 31 at the same time, and the second movable contact group 23 can be in contact with two second static contacts 32 at the same time, so as to realize parallel connection of the circuit. When it is needed to switch to a series charging mode, the movable contact support 21 can be further rotated counterclockwise by a certain angle, so that the first movable contact group 22 is in contact with one of the first static contacts 31 and one of the second static contacts 32 at the same time. Of course, the movable contact support 21 can also be further rotated clockwise by a certain angle, so that the second movable contact group 23 is in contact with one of the first static contacts 31 and one of the second static contacts 32 at the same time, so as to realize series connection of the circuit.

[0043] Specifically, the movable contact support 21 comprises a first rotating plate 211, a connecting shaft 213 and a second rotating plate 212 connected in sequence. The first rotating plate 211 and the second rotating plate 212 are arranged at intervals, and a slot 214 is formed between the first rotating plate 211, the connecting shaft 213 and the second rotating plate 212. One end of the two first static contacts 31 and one end of the two second static contacts 32 are arranged in the slot 214.

[0044] By arranging the slot 214, the installation stability of the first static contacts 31 and the second static contacts 32 can be improved, and the subsequent charging effect can be ensured.

[0045] In the embodiment, the first movable contact group 22 and the second movable contact group 23 are arranged on one side of the first rotating plate 211 close to the slot 214. The first movable contact group 22 and the second movable contact group 23 are arranged on one side of the second rotating plate 212 close to the slot 214.

[0046] That is to say, in the embodiment, the number of the first moving contact group 22 and the second moving contact group 23 is two, which are respectively arranged on the first rotating plate 211 and the second rotating plate 212, so that in the low-voltage charging scene, two first moving contact groups 22 can simultaneously clamp two first static contacts 31, and two second moving contact groups 23 can simultaneously clamp two second static contacts 32; or in the high-voltage charging scene, two first moving contact groups 22 can simultaneously clamp one first static contact 31 and one second static contact 32, or two second moving contact groups 23 can simultaneously clamp one first static contact 31 and one second static contact 32. Thus, the contact stability between the moving and static contacts is improved, the high short-time withstand capability of the double-pole double-throw switch 100 is ensured, and the charging efficiency is further improved.

[0047] Further, in order to facilitate the installation and disassembly of the first moving contact group 22 and the second moving contact group 23 and improve the assembly and maintenance efficiency, in the embodiment, the first rotating plate 211 is provided with a first mounting groove 2111 and a second mounting groove 2112, the first mounting groove 2111 and the second mounting groove 2112 are arranged at intervals and are both in communication with the insertion groove 214, the first moving contact group 22 is arranged in the first mounting groove 2111, and the second moving contact group 23 is arranged in the second mounting groove 2112.

[0048] Similarly, the second rotating plate 212 is provided with a third mounting groove 2121 and a fourth mounting groove 2122, the third mounting groove 2121 and the fourth mounting groove 2122 are arranged at intervals and are both in communication with the insertion groove 214, the first moving contact group 22 is arranged in the third mounting groove 2121, and the second moving contact group 23 is arranged in the fourth mounting groove 2122.

[0049] It should be noted that in other embodiments, the number of the first moving contact group 22 and the second moving contact group 23 can also be one, that is, the first moving contact group 22 and the second moving contact group 23 can be arranged only on the first rotating plate 211 or only on the first rotating plate 211.

[0050] Please refer to Figure 8 , Figure 8 The structure schematic diagram of the first moving contact group 22 and the second moving contact group 23 provided in the embodiment is shown in FIG. 2, which is combined with Figures 6-8 Specifically, the first moving contact group 22 includes a first moving contact 221 and a first elastic contact finger 222, the first moving contact 221 is arranged on the moving contact support 21 and used to contact the first static contact 31 or the second static contact 32, and the first elastic contact finger 222 is arranged on the moving contact support 21 and abuts against the first moving contact 221 and used to apply a pre-pressure to the first moving contact 221. Through the elastic force of the first elastic contact finger 222, the first moving contact 221 and the first static contact 31 or the second static contact 32 can be stably clamped, and the stability in the subsequent charging process is improved.

[0051] Similarly, the second moving contact group 23 includes a second moving contact 231 and a second elastic contact finger 232. The second moving contact 231 is arranged on the moving contact support 21 and is used to contact the second stationary contact 32 or the first stationary contact 31. The second elastic contact finger 232 is arranged on the moving contact support 21 and is in abutment with the second moving contact 231 and is used to apply a pre-pressing force to the second moving contact 231. It can be easily understood that, through the elastic force of the second elastic contact finger 232, the second moving contact 231 can also be stably clamped with the first stationary contact 31 or the second stationary contact 32, thereby improving the stability in the subsequent charging process.

[0052] It should be noted that, in the embodiment, the first elastic contact finger 222 and the second elastic contact finger 232 are both in an arch bridge type structure, that is, the two ends thereof are in abutment with the moving contact and the middle part thereof is arched, which can better apply a pre-pressing force to the moving contact.

[0053] Optionally, the first elastic contact finger 222 and the second elastic contact finger 232 are both silver-plated copper alloy contact fingers, which have the characteristics of high conductivity, anti-oxidation, and good tensile strength and hardness.

[0054] Please refer to Figure 9 , Figure 9 for a third perspective view of the structure of the moving contact structure 20 provided in the embodiment, in combination with Figures 6-9 , a part of the first moving contact 221 and a part of the second moving contact 231 are located in the insertion groove 214, which can better contact and cooperate with the first stationary contact 31 or the second stationary contact 32.

[0055] Further, in the embodiment, the part of the first moving contact 221 and the second moving contact 231 located in the insertion groove 214 is in a quadrangular pyramid structure, that is, the opposite two sides thereof are both provided with inclined guide surfaces, which can provide a guide function for the insertion end of the first stationary contact 31 and the second stationary contact 32 in the process of rotation, thereby improving the smoothness of the double-pole double-throw switch 100 in the process of switching the circuit.

[0056] In combination with Figure 3 , Figure 6 and Figure 7 , in the embodiment, the two first stationary contacts 31 are arranged perpendicular to each other, and the two second stationary contacts 32 are arranged perpendicular to each other. Through this perpendicular arrangement, the two first stationary contacts 31 can better abut and cooperate with the two ends of the first moving contact 221, and the two second stationary contacts 32 can better abut and cooperate with the two ends of the second moving contact 231, so that the switching process is smooth and stable, thereby improving the charging stability.

[0057] Further, one of the first static contacts 31 is symmetrically arranged with one of the second static contacts 32, and the other first static contact 31 is symmetrically arranged with the other second static contact 32. By arranging the symmetric static contacts, the embodiment can ensure that the contact area of one of the first static contacts 31 and one of the second static contacts 32 with the corresponding first moving contact 221 and second moving contact 231 is substantially the same, and also can ensure that the contact area of the other first static contact 31 and the other second static contact 32 with the two ends of the first moving contact 221 or the two ends of the second moving contact 231 is substantially the same, thereby further improving the stability during the charging process.

[0058] Please refer to Figure 10 , Figure 10 The structural schematic view of the base 10 provided in the embodiment is shown in FIG. 1, and the base 10 is combined with Figure 2 and Figure 10 The top of the base 10 is provided with a receiving groove 11, and the moving contact structure 20 is rotatably arranged in the receiving groove 11. In combination with Figure 9 and Figure 10 In the embodiment, the moving contact support 21 is rotatably arranged in the receiving groove 11. By arranging the receiving groove 11, the stability of the moving contact structure 20 during rotation can be improved.

[0059] In combination with Figure 7 and Figure 10 In order to further improve the rotation stability and facilitate the assembly of the moving contact structure 20 and the base 10, one of the bottom wall of the receiving groove 11 and the moving contact structure 20 is provided with a rotation boss 12, and the other of the bottom wall of the receiving groove 11 and the moving contact structure 20 is provided with a rotation groove 24, and the rotation boss 12 is arranged in the rotation groove 24.

[0060] It should be noted that in the embodiment, the bottom wall of the receiving groove 11 is provided with the rotation boss 12, and the bottom of the second rotation plate 212 of the moving contact structure 20 is provided with the rotation groove 24; of course, in other embodiments, the bottom wall of the receiving groove 11 can be provided with the rotation groove 24, and the second rotation plate 212 of the moving contact structure 20 can be provided with the rotation boss 12.

[0061] In order to limit the rotation angle of the moving contact structure 20, in the embodiment, the side of the rotation boss 12 is provided with a first limiting protrusion 121, and the side wall of the rotation groove 24 is provided with a second limiting protrusion 241, and the first limiting protrusion 121 is used for abutting and cooperating with the second limiting protrusion 241.

[0062] It is easy to understand that the stable rotation of the movable contact structure 20 and the switching of the circuit in series and parallel can be realized by the different abutting of the first limiting protrusion 121 and the second limiting protrusion 241. For example, by rotating the movable contact structure 20 clockwise, one end of the first limiting protrusion 121 and one end of the second limiting protrusion 241 abut, at this time the movable contact structure 20 connects two first static contacts 31 to conduct, and connects two second static contacts 32 to conduct, realizing parallel connection. Conversely, by rotating the movable contact structure 20 counterclockwise, the other end of the first limiting protrusion 121 and the other end of the second limiting protrusion 241 abut, at this time the movable contact structure 20 can connect one first static contact 31 and one second static contact 32 to conduct, realizing series connection.

[0063] It should be noted that the number of the first limiting protrusion 121 and the second limiting protrusion 241 can be multiple, and the multiple first limiting protrusions 121 and the multiple second limiting protrusions 241 are one-to-one corresponding. For example, in the embodiment, the number of the first limiting protrusion 121 and the second limiting protrusion 241 is two, the two first limiting protrusions 121 are arranged at intervals, and the two second limiting protrusions 241 are arranged at intervals; of course, in other embodiments, the number of the first limiting protrusion 121 and the second limiting protrusion 241 can be one, three, four, etc.

[0064] Optionally, in order to improve the wear resistance, the double-pole double-throw switch 100 can further include a wear-resistant bushing, which is embedded in the rotating groove 24 and sleeved on the rotating boss 12.

[0065] Please continue to combine Figure 2 and Figure 10 In order to further improve the stability of the first static contact 31 and the second static contact 32, two first insertion holes 13 and two second insertion holes 14 are arranged on the side of the base 10, and in the embodiment, the two first insertion holes 13 and the two second insertion holes 14 are in communication with the accommodating groove 11. The two first static contacts 31 are respectively arranged in the two first insertion holes 13, and in the embodiment, one end of the two first static contacts 31 is located in the accommodating groove 11; the two second static contacts 32 are respectively arranged in the two second insertion holes 14, and in the embodiment, one end of the two second static contacts 32 is located in the accommodating groove 11.

[0066] Specifically in the embodiment, the side of the base 10 comprises a first side 15, a second side 16 and a third side 17 connected in sequence, and the first side 15 is opposite to the third side 17. One of the first insertion holes 13 is arranged on the first side 15, one of the second insertion holes 14 is arranged on the third side 17, and the other first insertion hole 13 and the other second insertion hole 14 are both arranged on the second side 16, and the other first insertion hole 13 and the other second insertion hole 14 are arranged in a spaced manner.

[0067] It can be understood that through the rotation of the movable contact support 21, the first movable contact group 22 or the second movable contact group 23 is in contact with the first fixed contact 31 and the second fixed contact 32 located on the second side 16 at the same time, so as to realize the switching of the circuit to the series state. Through this arrangement, the rotation angle of the movable contact support 21 can be reduced, that is, the switching time of the circuit is shortened, and the charging efficiency is improved to a certain extent.

[0068] In order to better separate the first fixed contact 31 and the second fixed contact 32 and reduce the mutual influence between the lines, in the embodiment, the base 10 is also provided with a partition plate 18, which is arranged on the second side 16 and located between the first insertion hole 13 and the second insertion hole 14.

[0069] Please refer to Figure 11 , Figure 11 The structure diagram of the first fixed contact 31 and the second fixed contact 32 provided in the embodiment, combined with Figure 2 and Figure 11 , the first fixed contact 31 is provided with a first insertion end 311, which is used for contacting the movable contact structure 20, and the first insertion end 311 is a frustum structure; specifically in the embodiment, the first insertion end 311 is used for contacting the first movable contact 221 or the second movable contact 231.

[0070] Similarly, the second fixed contact 32 is provided with a second insertion end 321, which is used for contacting the movable contact structure 20, and the second insertion end 321 is a frustum structure; specifically in the embodiment, the second insertion end 321 is used for contacting the first movable contact 221 or the second movable contact 231.

[0071] By setting the first insertion end 311 and the second insertion end 321 as a frustum structure, the first fixed contact 31 and the second fixed contact 32 can be more conveniently inserted into the first insertion hole 13 and the second insertion hole 14 and inserted into the insertion slot 214.

[0072] Optionally, the taper angle θ of the frustum structure is 15°-25°, for example, the taper angle θ can be 15°, 20° or 25°, etc. Within this range, the insertion assembly effect of the first fixed contact 31 and the second fixed contact 32 is better.

[0073] Please continue to combine Figure 2 and Figure 3 The double-pole double-throw switch 100 further comprises a driving device 40, which is arranged on the base 10 and connected with the movable contact structure 20, and is used to drive the movable contact structure 20 to rotate relative to the base 10.

[0074] That is to say, the embodiment realizes the automatic switching of the series-parallel state in the circuit by arranging the driving device 40 to drive the movable contact structure 20 to rotate, and the switching efficiency can be improved. Of course, in other embodiments, the movable contact structure 20 can also be manually rotated by artificial manual operation, for example, an operator connects a rotating handle or other mechanical structure with the movable contact structure 20 to realize the rotation of the movable contact structure 20.

[0075] Further, in order to better drive the movable contact structure 20 to rotate, the double-pole double-throw switch 100 further comprises a linkage mechanism 50, which is arranged on the base 10, and the driving device 40, the linkage mechanism 50 and the movable contact structure 20 are sequentially connected.

[0076] Specifically, please refer to Figure 12 , Figure 12 the first perspective view of the linkage mechanism 50 provided in the embodiment, combined with Figure 2 and Figure 12 The linkage mechanism 50 comprises a first fixed plate 51, a linkage frame 52 and at least two linkage assemblies 53. The first fixed plate 51 is arranged on the base 10, the linkage frame 52 is arranged through the first fixed plate 51, and the two ends of the linkage frame 52 are respectively connected with the driving device 40 and the movable contact structure 20. The at least two linkage assemblies 53 are rotatably connected to the linkage frame 52, and the at least two linkage assemblies 53 are arranged at intervals.

[0077] That is to say, since the linkage assembly 53 is rotationally matched with the linkage frame 52, when the driving device 40 drives the linkage frame 52 to rotate, the linkage assembly 53 is also driven to rotate, at this time, the linkage assembly 53 can provide instantaneous torsional force for the linkage frame 52, so as to improve the rotation speed of the linkage frame 52 and the movable contact structure 20, thereby improving the speed of circuit switching and further improving the charging efficiency.

[0078] It should be noted that in the embodiment, the number of linkage assemblies 53 is two, the two linkage assemblies 53 are oppositely arranged and form a linkage structure similar to a "Z" type with the linkage frame 52, which can provide torsional force on both sides to ensure the stability of the instantaneous rotation process. Of course, in other embodiments, the number of linkage assemblies 53 can also be three or four, etc.

[0079] Please continue to combine Figure 12Specifically, the linkage assembly 53 comprises a linkage rod 533, a first limiting plate 531, a second limiting plate 532, a limiting column 534 and an elastic member 535. The linkage rod 533 is rotatably connected to the linkage frame 52. The first limiting plate 531 is fixedly arranged at one end of the linkage rod 533 close to the linkage frame 52. The second limiting plate 532 is slidably arranged at one end of the linkage rod 533 away from the linkage frame 52. The limiting column 534 is fixedly arranged at one end of the linkage rod 533 away from the linkage frame 52 and located at a side of the second limiting plate 532 away from the first limiting plate 531. The elastic member 535 is sleeved on the linkage rod 533, and two ends of the elastic member 535 abut against the first limiting plate 531 and the second limiting plate 532.

[0080] That is, by sliding the second limiting plate 532 on the linkage rod 533 and cooperating with the elasticity, in the case of instantaneous rotation, the second limiting plate 532 can compress the elastic member 535, and by the action of the elasticity, the linkage rod 533 can drive the linkage frame 52 to exert a torsional force, so as to increase the rotation speed of the linkage frame 52 and the movable contact structure 20.

[0081] Further, please refer to Figure 13 , Figure 13 the second perspective view of the linkage mechanism 50 provided in the embodiment, in combination with Figure 2 , Figure 12 and Figure 13 , the first fixed plate 51 is provided with a first arc-shaped hole 511 and a second arc-shaped hole 512. The side of the movable contact structure 20 close to the first fixed plate 51 is provided with a first arc-shaped groove 25 and a second arc-shaped groove 26. The first arc-shaped groove 25 is arranged in correspondence with the first arc-shaped hole 511, and the second arc-shaped groove 26 is arranged in correspondence with the second arc-shaped hole 512. The side of the linkage frame 52 close to the movable contact structure 20 is provided with a first rotation shaft 521 and a second rotation shaft 522. The first rotation shaft 521 is arranged in the first arc-shaped hole 511 and in the first arc-shaped groove 25. The second rotation shaft 522 is arranged in the second arc-shaped hole 512 and in the second arc-shaped groove 26.

[0082] It is easy to understand that by arranging the first arc-shaped hole 511 and the first arc-shaped groove 25, and the second arc-shaped hole 512 and the second arc-shaped groove 26, the rotation of the first rotation shaft 521 and the second rotation shaft 522 can be guided and limited, so as to control the rotation angle of the movable contact structure 20.

[0083] Please refer to Figure 14 , Figure 14 the structural schematic view of the driving device 40 provided in the embodiment, in combination with Figure 2 , Figure 12 and Figure 14The linkage mechanism 50 further comprises a first connecting column 54 arranged on the first fixed plate 51. The driving device 40 comprises a second fixed plate 41, a third fixed plate 42, a second connecting column 43, a motor 44 and a transmission mechanism 45. The second fixed plate 41, the third fixed plate 42 and the first fixed plate 51 are arranged in sequence and at intervals. The two ends of the first connecting column 54 are connected to the first fixed plate 51 and the third fixed plate 42 respectively. The two ends of the second connecting column 43 are connected to the second fixed plate 41 and the third fixed plate 42 respectively. The transmission mechanism 45 is arranged between the second fixed plate 41 and the third fixed plate 42, and one end of the transmission mechanism 45 is arranged through the third fixed plate 42 and connected to the linkage frame 52. The motor 44 is arranged through the third fixed plate 42 and connected to the transmission mechanism 45.

[0084] Further, in order to facilitate the installation and disassembly of the transmission mechanism 45 and the linkage frame 52, the linkage frame 52 is further provided with a clamping protrusion 523, and one end of the transmission mechanism 45 is provided with a clamping groove 451, and the clamping protrusion 523 is arranged in the clamping groove 451.

[0085] Please continue to combine Figure 1 and Figure 2 In order to protect the internal components of the double-pole double-throw switch 100, the double-pole double-throw switch 100 further comprises a shell 60 connected to the base 10, and the driving device 40 and the linkage mechanism 50 are arranged in the shell 60.

[0086] Specifically, the shell 60 comprises a middle cover 61 and an upper cover 62, the upper cover 62, the middle cover 61 and the base 10 are connected in sequence, the middle cover 61 is provided with a partition piece for further separating the internal components of the double-pole double-throw switch 100, the linkage mechanism 50 is located between the partition piece of the middle cover 61 and the base 10, and the transmission mechanism 45, the second fixed plate 41 and the third fixed plate 42 are located between the partition piece of the middle cover 61 and the upper cover 62.

[0087] In summary, the embodiment of the present application provides a double-pole double-throw switch 100 for switching the series or parallel connection of a circuit, which comprises a base 10, a movable contact structure 20 and a static contact group 30. The movable contact structure 20 is rotatably arranged on the base 10. The static contact group 30 comprises two first static contacts 31 and two second static contacts 32, both of which are arranged on the base 10 and used for arranging in the circuit. The movable contact structure 20 is used to rotate relative to the base 10 under the action of an external force to connect and conduct the two first static contacts 31 and the two second static contacts 32 respectively, so that the circuit is connected in parallel to form a first voltage platform; or, to connect and conduct one of the first static contacts 31 and one of the second static contacts 32, so that the circuit is connected in series to form a second voltage platform.

[0088] That is, in the low-voltage charging scenario, the two first static contacts 31 are connected in conduction and the two second static contacts 32 are connected in conduction by driving the movable contact structure 20 to rotate a certain angle relative to the base 10 through external force, to realize the parallel connection of the circuit to form a first voltage platform, which can be understood as a relatively low-voltage charging platform; so that the vehicle can be adapted to a low-voltage charger and obtain the maximum current. In the high-voltage charging scenario, one of the first static contacts 31 and one of the second static contacts 32 are connected in conduction by driving the movable contact structure 20 to rotate a certain angle relative to the base 10 through external force, to realize the series connection of the circuit to form a second voltage platform, which can be understood as a relatively high-voltage charging platform, so as to improve the charging speed of the vehicle. The double-pole double-throw switch 100 can change the series-parallel connection mode of the circuit according to different charging scenarios, realize switching of different voltage platforms for charging, and does not need to use a boost converter or a traction inverter, so as to simplify the charging system architecture, improve the charging efficiency, and reduce the cost.

[0089] The above merely describes specific embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A double pole double throw switch characterised in that, A double-pole double-throw switch (100) for switching a circuit in series or in parallel, comprising: a base (10); a movable contact structure (20) rotatably arranged on the base (10); and a stationary contact group (30) comprising two first stationary contacts (31) and two second stationary contacts (32), both of the two first stationary contacts (31) and the two second stationary contacts (32) are arranged on the base (10) and are used for arranging in the circuit; wherein the movable contact structure (20) is used for rotating relative to the base (10) under the action of an external force to connect and conduct the two first stationary contacts (31) and the two second stationary contacts (32) respectively, so that the circuit is in parallel to form a first voltage platform; or, connect and conduct one of the first stationary contacts (31) and one of the second stationary contacts (32), so that the circuit is in series to form a second voltage platform.

2. The double-pole double-throw switch of claim 1, wherein, The movable contact structure (20) comprises a movable contact support (21), a first movable contact group (22) and a second movable contact group (23), the movable contact support (21) is rotatably arranged on the base (10), and the first movable contact group (22) and the second movable contact group (23) are arranged on the movable contact support (21) and are arranged in a spaced manner; wherein the movable contact support (21) is used for rotating relative to the base (10) under the action of an external force to connect and conduct the two first stationary contacts (31) by the first movable contact group (22) and connect and conduct the two second stationary contacts (32) by the second movable contact group (23); or, connect and conduct one of the first stationary contacts (31) and one of the second stationary contacts (32) by the first movable contact group (22) or the second movable contact group (23).

3. The double-pole double-throw switch of claim 2, wherein, The movable contact support (21) comprises a first rotating plate (211), a connecting shaft (213) and a second rotating plate (212) connected in sequence, the first rotating plate (211) and the second rotating plate (212) are arranged in a spaced manner, and a slot (214) is formed between the first rotating plate (211), the connecting shaft (213) and the second rotating plate (212); one end of the two first stationary contacts (31) and one end of the two second stationary contacts (32) are arranged in the slot (214); the first movable contact group (22) and the second movable contact group (23) are arranged on one side of the first rotating plate (211) close to the slot (214); and / or, the first movable contact group (22) and the second movable contact group (23) are arranged on one side of the second rotating plate (212) close to the slot (214).

4. The double-pole double-throw switch of claim 2, wherein, The first moving contact group (22) comprises a first moving contact (221) and a first elastic contact finger (222), the first moving contact (221) is arranged on the moving contact support (21) and is used for contacting the first fixed contact (31) or the second fixed contact (32); the first elastic contact finger (222) is arranged on the moving contact support (21) and abuts against the first moving contact (221) and is used for applying a pre-pressure to the first moving contact (221); and / or, The second moving contact group (23) comprises a second moving contact (231) and a second elastic contact finger (232), the second moving contact (231) is arranged on the moving contact support (21) and is used for contacting the second fixed contact (32) or the first fixed contact (31); the second elastic contact finger (232) is arranged on the moving contact support (21) and abuts against the second moving contact (231) and is used for applying a pre-pressure to the second moving contact (231).

5. The double-pole double-throw switch of claim 1, wherein, The two first fixed contacts (31) are arranged perpendicularly to each other, and the two second fixed contacts (32) are arranged perpendicularly to each other; and / or, One of the first fixed contacts (31) is symmetrically arranged with one of the second fixed contacts (32), and the other of the first fixed contacts (31) is symmetrically arranged with the other of the second fixed contacts (32).

6. The double-pole double-throw switch of claim 1, wherein, The top of the base (10) is provided with a containing groove (11), and the moving contact structure (20) is rotatably arranged in the containing groove (11).

7. The double-pole double-throw switch of claim 6, wherein, The bottom wall of the containing groove (11) is provided with a rotating boss (12) and the other of the moving contact structure (20) is provided with a rotating groove (24), and the rotating boss (12) is arranged in the rotating groove (24).

8. The double-pole double-throw switch of claim 1, wherein, The side of the base (10) is provided with two first insertion holes (13) and two second insertion holes (14); The two first fixed contacts (31) are respectively arranged in the two first insertion holes (13), and the two second fixed contacts (32) are respectively arranged in the two second insertion holes (14).

9. The double-pole double-throw switch of claim 8, wherein, The side of the base (10) comprises a first side (15), a second side (16) and a third side (17) which are sequentially connected, and the first side (15) is arranged opposite to the third side (17); One of the first insertion holes (13) is arranged on the first side (15), one of the second insertion holes (14) is arranged on the third side (17), and the other of the first insertion holes (13) and the other of the second insertion holes (14) are both arranged on the second side (16), and the other of the first insertion holes (13) and the other of the second insertion holes (14) are arranged in a spaced manner.

10. The double-pole double-throw switch of claim 1, wherein, The double-pole double-throw switch (100) further comprises a driving device (40) and a linkage mechanism (50), both of which are arranged on the base (10), and the driving device (40), the linkage mechanism (50) and the movable contact structure (20) are sequentially connected, and the driving device (40) is used for driving the movable contact structure (20) to rotate relative to the base (10).

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