Intelligent overheating protection device for electric vehicle charging pile

Abstract

The invention discloses an electric vehicle charging pile intelligent overheating protection device which comprises a connecting plate fixedly installed on a charging pile and further comprises a traction assembly, and the traction assembly is used for pulling a charging part and separating the charging part from a vehicle when charging is abnormal and overheated. The traction assembly comprises two guide rods, a traction plate, two baffles, two supporting springs and two sets of locking mechanisms, a through hole is formed in the side wall of the traction plate, the charging component can penetrate through the through hole, and a guide hole is formed in the side wall of the connecting plate. By arranging the traction assembly, when abnormal overheating occurs in the charging process, the locking mechanism in the traction assembly can fix the charging component, then the traction assembly continuously pulls the fixed charging component, the charging component can be rapidly separated from the vehicle in a short time, and the risk of short-circuit accidents can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of overheat protection of charging piles, and in particular to an intelligent overheat protection device for an electric vehicle charging pile. Background Art

[0002] At present, electric vehicles generally need to go to charging piles and connect to charging piles through charging components with connecting wires. With the popularity of electric vehicles, the demand for charging piles is growing. However, during the charging process, the charging piles may overheat due to long-term operation or other reasons, which will not only affect the normal service life of the charging piles, but also may cause safety accidents, posing a threat to the charging safety of electric vehicles.

[0003] At present, if abnormal overheating occurs during the charging process, the charging circuit is generally disconnected through the temperature-sensing control element on the charging pile or charging component to prevent dangerous accidents. At this time, the charging component is still connected between the charging pile and the vehicle. When the charging circuit is disconnected, although the current path is cut off, if the circuit design inside the charging pile is not reasonable or a fault occurs, residual charge may accumulate in the charging component. If a conductive object touches the charging port of the vehicle at this time, a short circuit may occur. For example, in a humid environment, moisture may enter the charging port, and the residual charge will form a short-circuit path through the conductor of water, generating electric sparks, and then causing a fire. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an intelligent overheating protection device for an electric vehicle charging pile.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: An intelligent overheat protection device for an electric vehicle charging pile, comprising a connection plate fixedly mounted on the charging pile, and a pulling component, wherein the pulling component is used to pull a charging component when charging is abnormally overheated, and separate the charging component from the vehicle; The pulling assembly includes two guide rods, a pulling plate, two baffles, two support springs and two sets of locking mechanisms. The side wall of the pulling plate is provided with a through hole, and the through hole can pass through the charging component. The side wall of the connecting plate is provided with a guide hole. One end of the guide rod is slidably arranged in the guide hole, and the other end of the guide rod slides through the pulling plate, and the baffle is fixedly connected to the end of the guide rod. The baffle is arranged at the end of the guide rod away from the connecting plate. One end of the support spring is fixedly connected to the side wall of the connecting plate, and the other end of the support spring is fixedly connected to the side wall of the pulling plate. The locking mechanism is used to fix the charging component when the pulling assembly pulls the charging component.

[0006] Preferably, the locking mechanism includes a locking screw, a limit rod, a locking nut, a sleeve, a connecting rod, a locking rod and a fixed plate. A transmission groove is opened on the side wall of the pulling plate. The locking screw is rotatably arranged in the transmission groove. The limit rod is fixedly connected to the inner wall of the transmission groove, and the limit rod is arranged parallel to the locking screw. The sleeve is slidably arranged on the limit rod, and the locking nut is threadedly connected to the locking screw. The locking nut and the sleeve are fixedly connected together through a connecting rod. One end of the locking rod is fixedly connected to the side wall of the connecting rod, and the other end of the locking rod is fixedly connected to the fixed plate.

[0007] Preferably, a gear is rotatably connected in the transmission groove, the locking screw is fixedly connected at the axial center position of the gear, a rack meshing with the gear is also slidably connected in the transmission groove, and the rack is fixedly connected to the side wall of the guide rod.

[0008] Preferably, a gas tank is installed at the lower end of the connecting plate, and compressed carbon dioxide is stored in the gas tank. An air duct is also fixedly connected to the side wall of the connecting plate, and an end of the air duct away from the connecting plate is connected to an annular tube, and a plurality of jet holes are provided on the circumferential inner wall of the annular tube. The gas tank is connected to the air duct through a flow guiding mechanism, and the flow guiding mechanism is used to transport the carbon dioxide in the gas tank to the air duct.

[0009] Preferably, the flow guide mechanism includes a flow guide box, a connecting pipe, a movable plug, and a push rod. The movable plug is sealingly and slidably arranged in the flow guide box. One end of the connecting pipe is communicated with the flow guide box, and the other end of the connecting pipe is communicated with the air storage tank. One end of the push rod is fixedly connected to the side wall of the movable plug, and the other end of the push rod is fixedly connected to the side wall of the guide rod. The end of the air guide pipe away from the annular pipe is communicated with the flow guide box.

[0010] Preferably, a bracket is fixedly connected to the side wall of the connecting plate, a warning bell is fixedly connected to one end of the bracket away from the connecting plate, and an impact ball is fixedly connected to one end of the guide rod away from the baffle.

[0011] Preferably, an electromagnetic coil is installed in the guide hole, a magnetic ring is fixedly connected to the side wall of the guide rod, the electromagnetic coil is used to pass an alternating current with a continuously changing current direction when the charging component is abnormally overheated, and a limit ring is fixedly connected in the guide hole.

[0012] Preferably, the axis center of the annular tube and the axis center of the through hole are located on the same straight line.

[0013] The present invention has the following beneficial effects: 1. By setting up a pulling assembly, when abnormal overheating occurs during charging, the locking mechanism in the pulling assembly can fix the charging component, and then the pulling assembly will continuously pull the fixed charging component, which can quickly separate the charging component from the vehicle in a short time, thereby reducing the risk of short-circuit accidents; 2. By setting a locking mechanism, when the guide rod in the pulling assembly pulls the pulling plate back and forth, the locking mechanism can quickly lock and fix the connecting wire part of the charging component, and the pulling assembly can repeatedly pull the charging component multiple times, so that there is no need to apply excessive pulling force to avoid damage to the charging component, and at the same time, it can ensure that the charging component is separated from the vehicle to a limited extent; 3. By setting a warning bell, the guide rod will move repeatedly during the process of the pulling component pulling the charging component, and the impact ball can continuously hit the warning bell to sound an alarm. On the one hand, it can warn people near the vehicle to stay away to avoid dangerous accidents, and on the other hand, it can notify the staff of the charging station to deal with it in time; 4. By providing an annular tube, an air duct and a flow guiding mechanism, when the charging component is abnormally overheated, the compressed carbon dioxide in the gas tank can be quickly input into the annular tube along the air duct through the flow guiding mechanism, and blown to the surroundings of the charging component through the jet holes on the inner side of the annular tube. At the same time, the pulling assembly pulls the charging component back and forth, so that the ejected carbon dioxide can be sprayed to a wider area of ​​the charging component, thereby cooling the charging component and eliminating potential dangers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front structural schematic diagram of an intelligent overheating protection device for an electric vehicle charging pile proposed by the present invention; Figure 2 This is a schematic diagram of the side structure of an intelligent overheating protection device for an electric vehicle charging pile proposed by the present invention; Figure 3 It is a schematic diagram of the internal cross-section of the pulling plate and the structure of the locking mechanism in the present invention; Figure 4 It is a schematic diagram of the connection structure of the interior of the pulling plate, the guide rod, the air storage tank, the flow guiding mechanism and the air guiding pipe in the present invention; Figure 5 It is a schematic diagram of the connection structure between the guide mechanism, the guide rod and the air guide pipe after the guide box is cut in the present invention.

[0015] In the figure: 1 charging pile, 2 connecting plate, 3 supporting spring, 4 guide rod, 5 pulling plate, 6 baffle, 7 through hole, 8 air guide pipe, 9 annular pipe, 10 jet hole, 11 gas storage tank, 12 impact ball, 13 warning bell, 14 bracket, 15 locking screw, 16 locking nut, 17 sliding sleeve, 18 connecting rod, 19 locking rod, 20 fixing plate, 21 gear, 23 guide hole, 24 electromagnetic coil, 25 magnetic ring, 26 limit ring, 27 push rod, 28 guide box, 29 moving plug, 30 connecting pipe, 31 limit rod, 32 transmission groove. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] Embodiment 1: Reference Figure 1-3 , an intelligent overheat protection device for an electric vehicle charging pile, comprising a connection plate 2 fixedly mounted on a charging pile 1, and a pulling component, the pulling component being used to pull a charging component when charging is abnormally overheated, and to separate the charging component from the vehicle; The pulling assembly includes two guide rods 4, a pulling plate 5, two baffles 6, two support springs 3 and two sets of locking mechanisms. The side wall of the pulling plate 5 is provided with a through hole 7, and the through hole 7 can pass through the charging component. The side wall of the connecting plate 2 is provided with a guide hole 23. One end of the guide rod 4 is slidably set in the guide hole 23, and the other end of the guide rod 4 slides through the pulling plate 5, and the baffle 6 is fixedly connected to the end of the guide rod 4. The baffle 6 is set at the end of the guide rod 4 away from the connecting plate 2. One end of the support spring 3 is fixedly connected to the side wall of the connecting plate 2, and the other end of the support spring 3 is fixedly connected to the side wall of the pulling plate 5. The locking mechanism is used to fix the charging component when the pulling assembly pulls the charging component.

[0018] An electromagnetic coil 24 is installed in the guide hole 23, and a magnetic ring 25 is fixedly connected to the side wall of the guide rod 4. The electromagnetic coil 24 is used to pass an alternating current with a continuously changing current direction when the charging component is abnormally overheated, and a limit ring 26 is fixedly connected in the guide hole 23. Specifically, when the charging component is abnormally heated and overheated, an alternating current with a continuously changing direction can be passed to the electromagnetic coil 24 through a control circuit through a temperature sensing control element, so that the electromagnetic coil 24 generates a magnetic field with a continuously changing magnetic pole direction.

[0019] When using the device, the charging component on the charging pile is passed through the through hole 7 and connected to the electric vehicle to be charged for charging. In the present embodiment, if abnormal overheating occurs during the charging process, the electromagnetic coil 24 is immediately fed with an alternating current with a continuously changing direction, and the electromagnetic coil 24 can continuously generate magnetic attraction and magnetic repulsion on the magnetic ring 25 on the guide rod 4, thereby pushing the magnetic ring 25 and the guide rod 4 fixedly connected to the magnetic ring 25 to move back and forth, and at the same time, the locking mechanism fixes the connecting wire portion of the charging component passing through the through hole 7, so that the connecting wire portion of the charging component is fixed together with the pulling plate 5, and when the guide rod 4 moves toward one side of the charging pile, it can drive the baffle 6 to move together, and when the baffle 6 contacts the pulling plate 5, the baffle 6 can push the pulling plate 5 to move toward the side of the charging pile 1; and when the guide rod 4 is away from the charging pile 1, the support spring 3 can push the pulling plate 5 to move back and reset, and at the same time, the guide rod 4 can also drive the baffle 6 to move back and reset.

[0020] During this process, the wire portion of the charging component fixed on the pulling plate 5 by the locking mechanism will continue to move back and forth with the pulling plate 5, completing the technical effect of pulling the charging component back and forth. In this way, on the one hand, multiple pulling can be used to separate the charging component from the vehicle, and the force of pulling the charging component each time does not need to be too large, which can reduce the damage to the charging component. On the other hand, it can also ensure that the charging component is effectively detached from the vehicle.

[0021] Embodiment 2: Compared with Example 1, refer to Figure 3 The locking mechanism in this embodiment includes a locking screw 15, a limit rod 31, a locking nut 16, a sleeve 17, a connecting rod 18, a locking rod 19 and a fixed plate 20. A transmission groove 32 is opened on the side wall of the pulling plate 5. The locking screw 15 is rotatably set in the transmission groove 32. The limit rod 31 is fixedly connected to the inner wall of the transmission groove 32, and the limit rod 31 is arranged parallel to the locking screw 15. The sleeve 17 is slidably set on the limit rod 31. The locking nut 16 is threadedly connected to the locking screw 15. The locking nut 16 and the sleeve 17 are fixedly connected together through the connecting rod 18. One end of the locking rod 19 is fixedly connected to the side wall of the connecting rod 18, and the other end of the locking rod 19 is fixedly connected to the fixed plate 20. Specifically, by setting a limit rod 31, the locking nut 16 can be limited. When the locking screw 15 rotates, since the locking nut 16 is fixed to the sliding sleeve 17 through the connecting rod 18, and the sliding sleeve 17 can only slide along the direction of the limit rod 31, the locking nut 16 will not rotate therewith, and the locking nut 16 will move along the direction of the locking screw 15 under the action of the thread.

[0022] A gear 21 is rotatably connected in the transmission groove 32 , and a locking screw 15 is fixedly connected at the axial center position of the gear 21 . A rack 22 meshing with the gear 21 is also slidably connected in the transmission groove 32 , and the rack 22 is fixedly connected to the side wall of the guide rod 4 .

[0023] In this embodiment, refer to Figure 3 When the guide rod 4 moves to the right, it can drive the rack 22 on the lower side to move right together, so that the gear 21 can be driven to rotate clockwise, and then the locking screw 15 can be driven to rotate clockwise synchronously, so that the locking nut 16 moves toward the side of the through hole 7, and the locking nut 16 can drive the fixing plate 20 to move toward the center of the through hole 7 through the connecting rod 18 and the locking rod 19, so that the fixing plates 20 on both sides of the through hole 7 can move toward each other, and the two fixing plates 20 will fix the charging component wire passing through the through hole 7, and as the guide rod 4 moves to the right, the charging component wire passing through the through hole 7 can be fixed. As the rod 4 continues to move right, the baffle 6 will be driven to contact the side wall of the pulling plate 5. At this time, the guide rod 4 can drive the pulling plate 5 to move right together through the baffle 6, so the rack 22 no longer moves relative to the pulling plate 5, so the gear 21 and the locking screw 15 no longer rotate. The locking screw 15 and the locking nut 16 can keep the connecting rod 18, the locking rod 19 and the fixing plate 20 unchanged through the self-locking effect of their own threads, so as to fix the charging component wire on the pulling plate 5 and pull the charging component as the pulling plate 5 moves.

[0024] When the guide rod 4 moves to the left, it can drive the rack 22 to move left synchronously, which can drive the gear 21 and the locking screw 15 to rotate counterclockwise, so that the locking nut 16, the connecting rod 18, the locking rod 19 and the fixing plate 20 move in the opposite direction, which can loosen the fixation of the charging component wire, thereby facilitating the next pulling of the charging component.

[0025] Embodiment three: Compared with the first and second embodiments, a gas storage tank 11 is installed at the lower end of the connecting plate 2 in this embodiment, and compressed carbon dioxide is stored in the gas storage tank 11. The side wall of the connecting plate 2 is also fixedly connected to an air guide pipe 8. The end of the air guide pipe 8 away from the connecting plate 2 is connected to an annular tube 9. A plurality of jet holes 10 are opened on the circumferential inner wall of the annular tube 9, so that the gas entering the annular tube 9 can be blown to the surroundings of the charging component through the jet holes 10.

[0026] The gas storage tank 11 is connected to the gas guide pipe 8 through the guide mechanism, and the guide mechanism is used to transport the carbon dioxide in the gas storage tank 11 to the gas guide pipe 8. The axis of the annular tube 9 is located on the same straight line as the axis of the through hole 7. When using the device, the lead wire of the charging component can pass through the annular tube 9 and enter the through hole 7.

[0027] Reference Figure 4 and Figure 5The flow guiding mechanism includes a flow guiding box 28, a connecting pipe 30, a movable plug 29, and a push rod 27. The movable plug 29 is sealed and slidably arranged in the flow guiding box 28. One end of the connecting pipe 30 is in communication with the flow guiding box 28, and the other end of the connecting pipe 30 is in communication with the gas storage tank 11. One end of the push rod 27 is fixedly connected to the side wall of the movable plug 29, and the other end of the push rod 27 is fixedly connected to the side wall of the guide rod 4. The end of the air guide tube 8 away from the annular tube 9 is in communication with the flow guiding box 28. In the initial state, the right side of the movable plug 29 is in contact with the right inner wall of the flow guiding box 28, and the movable plug 29 can prevent the gas from flowing from the connecting pipe 30 to the air guide tube 8. When the movable plug 29 moves to the left, the gas can flow to the air guide tube 8 through the connecting pipe 30.

[0028] In this embodiment, the charging component can partially pass through the annular tube 9 and then enter the through hole 7. When the guide rod 4 moves back and forth, the movable plug 29 can be driven to move back and forth synchronously by the push rod 27. When the movable plug 29 moves to the left, the movable plug 29 can no longer block the connection between the connecting tube 30 and the air guide tube 8. At this time, the compressed carbon dioxide in the gas storage tank 11 can be input into the guide box 28 through the connecting tube 30, and then enter the air guide tube 8 from the guide box 28, and finally transported to the annular tube 9, and blown out from the jet holes on the circumferential inner wall of the annular tube 9 and sprayed to the four sides of the charging component. The compressed carbon dioxide gas blown out at high speed can quickly carry and dissipate the heat of the charging component to achieve the purpose of cooling. At the same time, in combination with the charging component in Example 1 and Example 2, which is pulled and moved continuously by the pulling assembly, the various parts of the charging component will continuously pass through the inside of the annular tube 9 when moving because the position of the annular tube 9 remains unchanged. In this way, the ejected carbon dioxide gas can cover various areas of the charging component over a large area to achieve the purpose of rapid and effective cooling. Even if a flame is generated due to overheating, it can be extinguished in time to prevent potential fire hazards.

[0029] Embodiment 4: A bracket 14 is fixedly connected to the side wall of the connecting plate 2, a warning bell 13 is fixedly connected to one end of the bracket 14 away from the connecting plate 2, and a striking ball 12 is fixedly connected to one end of the guide rod 4 away from the baffle 6. Specifically, Figure 2 As shown, the warning bell 13 is specifically a hollow bell, which can make a crisp sound when hit by the impact ball 12. In this embodiment, when the guide rod 4 moves back and forth, it can also drive the impact ball 12 to continuously impact the warning bell 13. In this way, when the charging component is abnormally overheated, the warning bell 13 can vibrate and sound an alarm. On the one hand, it can drive away people near the charging pile 1 to avoid personal injury. On the other hand, it can also promptly notify the personnel in the charging station to come and deal with it in time to avoid the escalation of the accident.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An intelligent overheat protection device for an electric vehicle charging pile, comprising a connection plate (2) fixedly mounted on the charging pile (1), and a pulling component, characterized in that: The pulling assembly is used to pull the charging component when charging is abnormally overheated and separate the charging component from the vehicle; The pulling assembly comprises two guide rods (4), a pulling plate (5), two baffles (6), two support springs (3) and two sets of locking mechanisms. The side wall of the pulling plate (5) is provided with a through hole (7), and the through hole (7) can pass through the charging component. The side wall of the connecting plate (2) is provided with a guide hole (23). One end of the guide rod (4) is slidably arranged in the guide hole (23), and the other end of the guide rod (4) slides through the pulling plate (5), and the baffle (6) is fixedly connected to the end of the guide rod (4). The baffle (6) is arranged at the end of the guide rod (4) away from the connecting plate (2). One end of the support spring (3) is fixedly connected to the side wall of the connecting plate (2), and the other end of the support spring (3) is fixedly connected to the side wall of the pulling plate (5). The locking mechanism is used to fix the charging component when the pulling assembly pulls the charging component.

2. The intelligent overheat protection device for an electric vehicle charging pile according to claim 1, characterized in that: The locking mechanism comprises a locking screw (15), a limiting rod (31), a locking nut (16), a sliding sleeve (17), a connecting rod (18), a locking rod (19) and a fixing plate (20). A transmission groove (32) is provided on the side wall of the pulling plate (5). The locking screw (15) is rotatably arranged in the transmission groove (32). The limiting rod (31) is fixedly connected to the inner wall of the transmission groove (32). The limiting rod (31) is arranged parallel to the locking screw (15). The sliding sleeve (17) is slidably arranged on the limiting rod (31). The locking nut (16) is threadedly connected to the locking screw (15). The locking nut (16) and the sliding sleeve (17) are fixedly connected together through the connecting rod (18). One end of the locking rod (19) is fixedly connected to the side wall of the connecting rod (18), and the other end of the locking rod (19) is fixedly connected to the fixing plate (20).

3. The intelligent overheat protection device for an electric vehicle charging pile according to claim 2, characterized in that: A gear (21) is rotatably connected in the transmission groove (32), the locking screw (15) is fixedly connected at the axial center of the gear (21), and a rack (22) meshing with the gear (21) is also slidably connected in the transmission groove (32), and the rack (22) is fixedly connected to the side wall of the guide rod (4).

4. The intelligent overheat protection device for an electric vehicle charging pile according to claim 1, characterized in that: A gas storage tank (11) is mounted at the lower end of the connecting plate (2), wherein compressed carbon dioxide is stored in the gas storage tank (11), and an air guide pipe (8) is fixedly connected to the side wall of the connecting plate (2), wherein one end of the air guide pipe (8) away from the connecting plate (2) is connected to an annular pipe (9), wherein a plurality of air injection holes (10) are formed on the circumferential inner wall of the annular pipe (9), and the gas storage tank (11) is connected to the air guide pipe (8) via a flow guiding mechanism, wherein the flow guiding mechanism is used to transport the carbon dioxide in the gas storage tank (11) to the air guide pipe (8).

5. The intelligent overheat protection device for an electric vehicle charging pile according to claim 4, characterized in that: The flow guide mechanism comprises a flow guide box (28), a connecting pipe (30), a movable plug (29), and a push rod (27); the movable plug (29) is sealingly and slidably arranged in the flow guide box (28); one end of the connecting pipe (30) is in communication with the flow guide box (28); the other end of the connecting pipe (30) is in communication with the air storage tank (11); one end of the push rod (27) is fixedly connected to a side wall of the movable plug (29); the other end of the push rod (27) is fixedly connected to a side wall of the guide rod (4); and one end of the air guide pipe (8) away from the annular pipe (9) is in communication with the flow guide box (28).

6. The intelligent overheat protection device for an electric vehicle charging pile according to claim 1, characterized in that: A bracket (14) is fixedly connected to the side wall of the connecting plate (2), an end of the bracket (14) away from the connecting plate (2) is fixedly connected to a warning bell (13), and an end of the guide rod (4) away from the baffle (6) is fixedly connected to an impact ball (12).

7. The intelligent overheat protection device for an electric vehicle charging pile according to claim 1, characterized in that: An electromagnetic coil (24) is installed in the guide hole (23), and a magnetic ring (25) is fixedly connected to the side wall of the guide rod (4). The electromagnetic coil (24) is used to pass an alternating current with a continuously changing current direction when the charging component is abnormally overheated. A limit ring (26) is fixedly connected in the guide hole (23).

8. The intelligent overheat protection device for an electric vehicle charging pile according to claim 4, characterized in that: The axis center of the annular tube (9) and the axis center of the through hole (7) are located on the same straight line.

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