New energy automobile charging pile with temperature monitoring function

Abstract

The invention relates to the technical field of new energy automobile charging pile monitoring, in particular to a new energy automobile charging pile with a temperature monitoring function, which comprises a charging pile body and a charging gun body arranged on the charging pile body, a protective cover is arranged at the end part of the charging gun body, and a pressing plate is arranged in the protective cover. Two groups of DC terminals and other various auxiliary terminals are symmetrically arranged on the pressing plate; clamping plates are symmetrically arranged on the two sides of the pressing plate, DC clamping grooves are formed in the clamping plates, the DC terminal is clamped in the DC clamping grooves, a limiting assembly is arranged at the tail end of the DC terminal, a conductive assembly is arranged in the limiting assembly, a stretching assembly is arranged at the tail end of the conductive assembly, and the stretching assembly is in butt joint with a cable; by constructing a non-electric-control mechanical protection mechanism integrating efficient heat conduction, low-impedance multi-contact electric conduction and arc prevention physical isolation, the problem that an electronic temperature control single point at a core power terminal of an existing charging pile fails is solved, and the bottlenecks of slow thermal response and poor electric conduction performance in a traditional mechanical redundancy scheme are broken through.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle charging pile monitoring technology, and more specifically, to a new energy vehicle charging pile with temperature monitoring. Background Technology

[0002] A search revealed a self-protected new energy vehicle charging pile disclosed in publication number CN116001618A, comprising a support frame and a charging pile body. The charging pile body is fixedly connected to the top of the support frame, a support column is fixedly connected to the top of the charging pile body, and an air intake box is fixedly connected to the top of the support column. Inert gas storage boxes are symmetrically fixedly connected to both sides of the charging pile body. The beneficial effect of this invention is that by setting up a heat dissipation mechanism, targeted heat dissipation can be achieved around the charging pile body. Four temperature sensors detect the temperature of the air at the bottom and around the outer perimeter of the charging pile body. When the temperature on one side is too high, the PLC controller activates the cooling fan on that side. Then, the air below enters the air outlet channel through the air intake filter and is discharged from the air outlet grille, thus cooling the side of the charging pile body with air, reducing the risk of overheating, malfunction, or fire, and further protecting itself.

[0003] The aforementioned patents still have shortcomings in practical use. Although existing new energy vehicle charging piles have generally integrated temperature sensors such as NTC to construct a temperature monitoring and automatic cut-off protection system based on electronic signals, significant limitations still exist in practical applications. Current technologies mostly rely on overall temperature control of the charging gun or pile body, neglecting the core high heat flux density area of ​​the DC positive and negative (DC+ / DC-) power terminals. Simply relying on the electronic link of "sensor perception + controller logic power-off" will lead to complete paralysis of the protection mechanism if the control unit malfunctions, communication fails, or software fails, making it difficult to cope with the increasingly frequent risks of charging thermal runaway.

[0004] Therefore, it is urgent to introduce a non-electrically controlled mechanical redundancy protection mechanism to build an independent "physical firewall" outside the electronic defense line, ensuring that forced power-off can still be achieved through purely mechanical means when the electronic system fails. However, existing mechanical protection schemes still have the following problems: First, the thermal coupling efficiency is low, and there is a lack of efficient heat conduction path between the temperature sensing element and the heating terminal, resulting in a response lag; second, there is a compromise in conductivity performance. Since the mechanical tripping mechanism is often connected in series in the main current circuit, it is often limited by special temperature sensing materials or discontinuous contact structures, which often leads to increased contact resistance and reduced conductivity, thereby causing new heating hazards.

[0005] Based on this, the present invention discloses a new energy vehicle charging pile with temperature monitoring. Summary of the Invention

[0006] To address the single-point failure risk at the core power terminals (DC+ / DC-) of charging piles relying solely on electronic temperature control systems, as mentioned in the background technology, and the dual bottlenecks of thermal coupling hysteresis and low conductivity in existing mechanical redundancy solutions, there is an urgent need to construct a non-electrically controlled mechanical overheat protection mechanism that combines efficient heat conduction paths with low impedance current carrying characteristics to provide reliable physical power-off protection in the event of electronic system failure. This invention provides a new energy vehicle charging pile with temperature monitoring, comprising a charging pile body and a charging gun body mounted on the charging pile body. A protective cover is provided at the end of the charging gun body, and a pressure plate is provided inside the protective cover. Two sets of DC terminals and other auxiliary terminals are symmetrically arranged on the pressure plate. A clamping plate is symmetrically arranged on both sides of the pressure plate, forming a DC clamping slot within the clamping plate. The DC terminals are clamped in the DC clamping slot. A limit component is provided at the end of the DC terminal, and a conductive component is provided within the limit component. A tensioning component is provided at the end of the conductive component, and the tensioning component is connected to the cable.

[0007] To facilitate the installation and connection of the mechanical redundancy protection device while meeting the requirements for both conductivity and power failure protection, this invention employs the following method: after installing the DC terminal, the entire mechanical redundancy protection device is directly connected to the card plate, and then the conductive components are directly connected to the end of the DC terminal, and finally fixed by the connection assembly.

[0008] Based on this, traditional mechanical redundancy protection has the problem of compromising conductivity. Mechanical tripping mechanisms are often connected in series in the main current circuit. Due to the limitations of special temperature-sensing materials or discontinuous contact structures, this often leads to increased contact resistance and reduced conductivity. Therefore, this invention adopts a separate design for the tripping component and the conductive component. In order to facilitate tripping, the conductive component is divided into several small parts for separate conduction, which can both increase conductivity and meet the tripping power-off requirements. As a further improvement to this technical solution, the limiting component includes a limiting ring slidably disposed on the card plate, and the conductive component includes a fixed disk electrically connected to the end of the DC terminal. The fixed disk has several conductive grooves, and the limiting ring has a conductive plate. The conductive plate has conductive terminals that correspond one-to-one with the conductive grooves. The fixed disk is fixed in the center of the docking ring. The conductive grooves and conductive terminals are both tapered. The end of the conductive groove is adapted to the inner diameter of the end of the DC terminal. Several conductive clips are circumferentially fixed in the front end of the conductive groove. The ends of the conductive clips are L-shaped, and the ends of the several conductive clips form a lotus-shaped structure. The inner diameter formed by the lotus-shaped structure ends is smaller than the outer diameter of the front end of the conductive terminal.

[0009] In another solution, since traditional power failure protection may result in electric arcs or sparks after disconnection, this invention uses a gasket added at the connection point for protection after power failure. In another solution, for the tripping mechanism, the traditional tripping mechanism has low thermal coupling efficiency and lacks an efficient heat conduction path between the temperature sensing element and the heating terminal, resulting in a delayed response. Therefore, this invention adopts a method of fully contacting the entire temperature sensing element with the DC terminal and using the deformation memory characteristics of the temperature sensing element to trigger the tripping. As a further improvement to this technical solution, a trip spring is provided inside the card plate. One side of the trip spring is attached to the surface of the DC terminal, and the other side of the trip spring is engaged with the limiting ring. The trip spring includes a fixed spring fixed in the card plate, a heat-conducting spring fixedly connected to the bottom of the fixed spring in the DC card slot, the heat-conducting spring being adapted to the structure of the DC card slot, and there is an included angle between the heat-conducting spring and the fixed spring; a deformable spring fixedly connected to the top of the fixed spring in the movable slot, and a fixed wedge adapted to the limiting wedge being fixedly connected to the end of the deformable spring; In addition, the trip spring is made of nickel-titanium alloy and has deformation memory properties; In the initial state, the angle between the deformable spring and the fixed spring is greater than 30°; When the temperature rises to the preset temperature of 63-67°C, the angle between the deformable spring and the fixed spring decreases to within 15°; and at this time, the fixed wedge and the limiting wedge disengage.

[0010] As a further improvement to this technical solution, a return spring is provided inside the conductive sleeve, the front end of the conductive cone plate is connected to the conductive disk through the return spring, and a bolt is threadedly connected to the end of the conductive cone plate, with several protrusions fixedly connected to the bottom of the bolt; in the initial state, the return spring is in a stretched state. It should be noted that when the conductive terminal is disconnected from the insulating curtain, the limiting wedge is in contact with the end of the receiving groove, the front end of the sliding rod is in contact with the end of the sliding groove, the reset spring returns to the unstretched state, and the front end of the conductive cone plate is in contact with the front end of the limiting groove.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this new energy vehicle charging pile with temperature monitoring, a split multi-contact conductive structure is set up in conjunction with lotus-shaped elastic clips to decouple the conduction function of the main current circuit from the mechanical tripping action. Multi-point contact is achieved by using conical connectors and circumferentially arrayed conductive grooves, and the contact area is increased by lotus-shaped clips within each point. In this way, while meeting the requirements for rapid separation and power-off, the contact resistance is significantly reduced, avoiding the problem of low conductivity caused by discontinuous contact or series connection of special temperature-sensing materials in traditional mechanical protection. Thus, the unity of low impedance current carrying and high reliability conductivity is achieved.

[0012] 2. In this new energy vehicle charging pile with temperature monitoring, a linkage mechanism between a self-resetting insulating curtain and a reset ring is set up. At the moment the conductive terminal is pulled out and the power is cut off, the elastic reset characteristics of the insulating curtain petals are used to quickly fill the contact gap and form a physical isolation barrier. This structure effectively increases the electrical gap between the break points, preventing the generation of electric arcs or sparks due to the air breakdown caused by the break distance being too close. It solves the problem that existing solutions still have the risk of secondary short circuits or fires after emergency power cut-off, thereby greatly improving the safety and fire resistance of the mechanical power cut-off process.

[0013] 3. In this new energy vehicle charging pile with temperature monitoring, by setting a direct conduction path between the fitted thermal conductive spring and the shape memory alloy deformation spring, and using thermal conductive silicone grease to fill the interface gaps, the heat from the heating terminal can be transferred to the temperature sensing element without lag, triggering it to undergo memory deformation at a lower temperature threshold (63-67℃) to release the locking mechanism; this purely mechanical thermal coupling method eliminates the dependence on the electronic control unit, overcomes the risk of thermal response lag and single-point failure of the electronic system in the prior art, and thus can still provide timely and reliable physical redundancy protection when the electronic temperature control fails. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the charging gun body of the present invention; Figure 3 This is a schematic diagram of the internal structure of the protective cover of the present invention; Figure 4 This is a schematic diagram of the structure of the pressure plate of the present invention; Figure 5 This is a schematic diagram of the docking assembly of the present invention; Figure 6 This is a schematic diagram of the limiting component of the present invention; Figure 7 This is a cross-sectional view of the pressure plate of the present invention; Figure 8 for Figure 7 Enlarged view of the structure at point A in the middle; Figure 9 This is a schematic diagram of the structure of the heat-conducting spring sheet of the present invention; Figure 10 This is a schematic diagram of the structure of the insulating sheet of the present invention; Figure 11 This is a cross-sectional view of the docking ring of the present invention; Figure 12 for Figure 11 Enlarged view of the structure at point B; Figure 13 This is a cross-sectional view of the conductive sleeve of the present invention; Figure 14 This is one of the schematic diagrams showing the working state of the mechanical redundancy protection mechanism of the present invention; Figure 15 for Figure 14 Enlarged view of the structure at point C; Figure 16 The second schematic diagram shows the working state of the mechanical redundancy protection mechanism of the present invention.

[0015] The meanings of the labels in the diagram are as follows: 1. Charging pile body; 2. Charging gun body; 3. Protective cover; 4. Pressure plate; 5. DC terminal; 6. Docking assembly; 7. Limiting assembly; 8. Conductive assembly; 9. Tensioning assembly; 41. Card slot; 42. Card plate; 43. DC card slot; 61. Docking ring; 62. Docking clamp; 63. Docking groove; 64. Docking block; 71. Limiting ring; 72. Connecting rod; 73. Limiting wedge; 74. Tripping spring; 75. Receiving groove; 76. Fixing groove; 77. Movable groove; 78. Sliding rod; 79. Sliding channel; 741. Fixed spring; 742. Heat-conducting spring; 743. Deformation spring; 744. Fixed wedge; 81. Fixed plate; 82. Tapered connector; 83. Insulating sheet; 84. Insulating curtain; 85. Conductive groove; 86. Conductive clamp; 87. Conductive disc; 88. Conductive terminal; 841. Curtain petals; 842. Reset ring; 91. Conductive sleeve; 92. Limiting groove; 93. Conductive cone plate; 94. Return spring; 95. Bolt; 96. Protrusion. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Existing charging piles rely solely on electronic temperature control systems, which pose a single-point failure risk at the core power terminals (DC+ / DC-). Furthermore, existing mechanical redundancy solutions face the dual bottlenecks of thermal coupling hysteresis and low conductivity efficiency. There is an urgent need to construct a non-electrically controlled mechanical overheat protection mechanism that combines efficient heat conduction paths with low impedance current carrying characteristics, in order to provide reliable physical power-off protection in the event of electronic system failure.

[0018] Therefore, this invention provides a new energy vehicle charging pile with temperature monitoring, see [link to relevant documentation]. Figures 1-5As shown, it includes a charging pile body 1 and a charging gun body 2 mounted on the charging pile body 1. A protective cover 3 is provided at the end of the charging gun body 2. A pressure plate 4 is provided inside the protective cover 3. Two sets of DC terminals 5 and other auxiliary terminals are symmetrically arranged on the pressure plate 4. A clamping plate 42 is symmetrically arranged on both sides of the pressure plate 4. A DC slot 43 is formed in the clamping plate 42. The DC terminal 5 is clamped in the DC slot 43. A limiting component 7 is provided at the end of the DC terminal 5. A conductive component 8 is provided inside the limiting component 7. A tensioning component 9 is provided at the end of the conductive component 8. The tensioning component 9 is connected to the cable.

[0019] During operation, the two sets of DC terminals 5 and various auxiliary terminals are respectively inserted into the corresponding slots 41 and DC slots 43 on the pressure plate 4. Then, the entire mechanical redundancy protection device is inserted into the end of the DC terminal 5 and the end of the pressure plate 42. After that, the limit component 7 is pressed to complete the installation of the conductive related components and the tripping component. Then, the cable is connected to the tension component 9 and the entire mechanical redundancy protection device is tightened so that the tripping component is in a stretched state.

[0020] For details, see Figures 4-8 As shown, in order to facilitate the installation and docking of the mechanical redundancy protection device and meet the requirements of both conductivity and power failure protection, this invention adopts the following approach: after installing the DC terminal 5, the entire mechanical redundancy protection device is directly docked onto the card plate 42, and then the conductive components are directly docked into the end of the DC terminal 5, and then fixed by the docking assembly 6. Specifically, the mechanical redundancy protection device includes the docking assembly 6, which includes a docking ring 61. A plurality of docking heads 62 are fixed on one side of the front end of the docking ring 61. The end of the card plate 42 is provided with docking grooves 63 that correspond one-to-one with the docking heads 62. A docking block 64 adapted to the docking heads 62 is fixed in the docking groove 63.

[0021] During operation, push the docking ring 61 forward so that the docking clips 62 on the docking ring 61 are aligned with the corresponding docking slots 63 and inserted. Figure 6 As can be seen, docking is completed when the notch on the docking head 62 is engaged with the docking block 64 in the docking groove 63, thus completing the assembly of the docking component 6. This is simple and convenient, and it also fixes the entire docking component 6 on the card plate 42.

[0022] Further, see Figure 5 , Figure 6 and Figures 10-12As shown, traditional mechanical redundancy protection suffers from compromises in conductivity. Mechanical tripping mechanisms are often connected in series in the main current circuit, which, limited by special temperature-sensing materials or discontinuous contact structures, often leads to increased contact resistance and reduced conductivity. Therefore, this invention adopts a separate design for the tripping component and the conductive component. To facilitate tripping, the conductive component is divided into several small parts for separate conductivity, thus increasing conductivity while meeting the tripping and power-off requirements. Specifically, regarding the conductive component, firstly, the limiting assembly 7 includes a limiting ring 71 slidably disposed on the locking plate 42, and the conductive assembly 8 includes a fixed disk 81 electrically connected to the end of the DC terminal 5. The fixed disk 81 is fixedly connected within the docking ring 61. A tapered connector 82 is fixedly connected to the front end of 81. The tapered connector 82 has a tapered structure, and the outer diameter of the end of the tapered connector 82 is adapted to the inner diameter of the end of the DC terminal 5. A plurality of conductive grooves 85 are opened in the fixed plate 81, and a conductive plate 87 is provided in the limiting ring 71. A conductive terminal 88 corresponding to the conductive groove 85 is provided on the conductive plate 87. Both the conductive groove 85 and the conductive terminal 88 have a tapered structure. The end of the conductive groove 85 is adapted to the inner diameter of the end of the DC terminal 5. A plurality of conductive clips 86 are circumferentially fixed in the front end of the conductive groove 85. The ends of the conductive clips 86 have an L-shaped structure, and the ends of the conductive clips 86 form a lotus-shaped structure. The inner diameter formed by the end of the lotus-shaped structure is smaller than the outer diameter of the front end of the conductive terminal 88.

[0023] During operation, since the fixed plate 81 is fixedly connected to and concentrically connected to the docking ring 61, installing the docking ring 61 is equivalent to installing the fixed plate 81 and its related structures. In other words, as the docking ring 61 and the clamping plate 42 complete their docking, the tapered connector 82 is inserted into the end of the DC terminal 5. Due to its tapered and petal-shaped structure, it can be compressed and inserted into the end of the DC terminal 5, increasing its stability and conductivity, resulting in more uniform contact points. The fixed plate 81 contains several tapered conductive grooves 85 arranged in a circular array. Figure 11 and Figure 12 It can be seen that this multi-point design results in higher conductivity and prevents the risk of single-point failure. Secondly, the discontinuous contact structure of the traditional main current circuit is prone to high contact resistance, resulting in low conductivity. However, taking a single contact on the fixed plate 81 as an example, its interior is designed with a conical structure, and several lotus-shaped conductive clips 86 are added. When the conductive terminal 88 is inserted into the conductive groove 85, the conical and lotus-shaped structures increase the stability of the conductive terminal 88 and the conductivity of the contact. In other words, the design of multiple contacts and single contact with multiple contact surfaces solves the above-mentioned problems of the traditional method. At the same time, the multiple contacts are relatively small, so as not to affect the subsequent tripping and power-off process.

[0024] Furthermore, see Figures 10-12As shown, since traditional power failure protection may result in electric arcs or sparks after disconnection, this invention uses a gasket added at the connection point after power failure for protection. Specifically, an insulating sheet 83 is fixedly connected to the end of the mating ring 61. The insulating sheet 83 is provided with a plurality of insulating curtains 84 that correspond one-to-one with and are adapted to the conductive grooves 85. The insulating curtains 84 include a plurality of curtain petals 841 arranged in a circumferential manner. The plurality of curtain petals 841 are tightly fitted together to form a circular sheet. A reset ring 842 is fixedly provided on the edge of the curtain petal 841. The distance from the top of the conductive clip 86 to the curtain petal 841 is greater than the radius of the insulating curtain 84.

[0025] During operation, when the tripping and power-off process is completed, due to the limitations of traditional methods, including this invention, to facilitate subsequent power restoration and due to the limited internal space of the product, the disconnection points are often close together. Furthermore, given the development of the new energy vehicle industry, it is essential to enhance the safety of power-off operations. Therefore, to prevent the potential for air breakdown and the generation of electric arcs or sparks after power failure, an insulating sheet 83 is added to ensure an insulating layer after disconnection. However, in this invention, the insulating sheet 83 is not merely a single insulating layer; by creating corresponding insulating curtains 84, each contact point—that is, the connection point between the conductive groove 85 and the conductive terminal 88—is equipped with an insulating layer. The corresponding insulating curtain 84 is used for isolation. That is, when the conductive terminal 88 is inserted, the curtain petal 841 will be pressed into the conductive groove 85. Then, the end of the conductive terminal 88 conducts electricity through several conductive clips 86 and the inner wall of the conductive groove 85. When the conductive terminal 88 is pulled out, the curtain petal 841 will self-restore into a disc shape to block the opening of the conductive groove 85. Secondly, the addition of the reset ring 842 can increase the self-restoreability of the curtain petal 841. After the curtain petal 841 is squeezed into the conductive groove 85, the redundant design of the edge increases the restoreability of the curtain petal 841, ensuring that it can quickly restore to a disc shape after the conductive terminal 88 is pulled out.

[0026] Furthermore, refer to Figures 4-9 and Figure 11 , Figure 13 As shown, for the tripping mechanism, the traditional tripping mechanism has low thermal coupling efficiency and lacks an efficient heat conduction path between the temperature sensing element and the heating terminal, resulting in a delayed response. Therefore, this invention adopts a method of fully contacting the entire temperature sensing element with the DC terminal 5, and triggering the tripping by utilizing the deformation memory characteristics of the temperature sensing element. Specifically, a tripping spring 74 is provided in the card plate 42. One side of the tripping spring 74 is attached to the surface of the DC terminal 5, and the other side of the tripping spring 74 is engaged with the limiting ring 71. Several sliding rods 78 are fixedly provided circumferentially on the limiting ring 71. The end of the docking ring 61 is provided with a sliding groove 79 that corresponds to and matches the sliding rods 78 one by one. The sliding rods 78 are slidably connected in the sliding groove 79. Two sets of docking rods 72 are symmetrically fixed on the limiting ring 71. The front end of the docking rod 72 is fixedly connected to the limiting wedge block 73. The clamping plate 42 is symmetrically provided with slots corresponding to the limiting wedge block 73. The slots are the receiving slot 75 and the fixing slot 76 opened sequentially along the sliding direction of the limiting wedge block 73. The clamping plate 42 is also provided with a movable slot 77. The receiving slot 75, the fixing slot 76 and the movable slot 77 are interconnected. The trip spring 74 includes a fixed spring 741 fixed in the card plate 42. The bottom of the fixed spring 741 is fixedly connected to a heat-conducting spring 742 in the DC card slot 43. The heat-conducting spring 742 is adapted to the structure of the DC card slot 43, and there is an included angle between the heat-conducting spring 742 and the fixed spring 741. The top of the fixed spring 741 is fixedly connected to a deformable spring 743 in the movable slot 77. The end of the deformable spring 743 is fixedly connected to a fixed wedge 744 adapted to the limiting wedge 73. In addition, the trip spring 74 is made of nickel-titanium alloy and has deformation memory properties; In the initial state, the angle between the deformable spring 743 and the fixed spring 741 is greater than 30°; When the temperature rises to the preset temperature of 63-67℃, the angle between the deformable spring 743 and the fixed spring 741 decreases to within 15°; and at this time, the fixed wedge 744 and the limiting wedge 73 disengage.

[0027] Secondly, the tensioning assembly 9 includes a conductive sleeve 91 fixedly connected to the end of the conductive disk 87. The conductive sleeve 91 has several circumferentially oriented limiting grooves 92. The conductive cone plate 93 is slidably connected to the conductive sleeve 91 through the limiting grooves 92. A return spring 94 is provided inside the conductive sleeve 91. The front end of the conductive cone plate 93 is connected to the conductive disk 87 through the return spring 94. A bolt 95 is threadedly connected to the end of the conductive cone plate 93. Several protrusions 96 are fixedly connected to the bottom of the bolt 95. In the initial state, the return spring 94 is in a stretched state, and the length of the limiting groove 92, the length of the sliding groove 79, and the distance from the fixed wedge block 744 to the end of the receiving groove 75 are adapted to the length of the conductive terminal 88. It should be noted that when the conductive terminal 88 is separated from the insulating curtain 84, the limiting wedge 73 is attached to the end of the receiving groove 75, the front end of the slide rod 78 is attached to the end of the slide groove 79, the return spring 94 returns to the unstretched state, and the front end of the conductive cone plate 93 is attached to the front end of the limiting groove 92.

[0028] Therefore, the overall process is as follows: Phase 1: The temperature of DC terminal 5 rises, and the deformed spring 743 recovers its deformation. Second stage: The limiting ring 71 moves back and resets through the conductive cone plate 93, causing several conductive terminals 88 to move back and cut off the electrical connection between the conductive terminals 88 and the fixed plate 81.

[0029] It should be added that since the preset temperature of NTC sensors is generally around 95°C, the electronic power-off protection will only be triggered when this temperature is reached. Considering that the mechanical redundancy protection device uses mechanical heat conduction and deformation to cut off power, there is a certain lag. However, this invention has minimized the lag as much as possible, and the materials used are also relatively fast in terms of heat conduction. However, in order to avoid too much lag, the preset temperature is set between 63-67°C to trigger the mechanical redundancy protection device to work, which can further avoid lag. In specific operation, when the docking ring 61 drives the fixed plate 81 to complete the docking of the end of the DC terminal 5 and the end of the card plate 42, that is, when the docking card head 62 is inserted into the docking groove 63 and the tapered connector 82 is inserted into the DC terminal 5, the entire limiting ring 71 is pushed. Since the conductive plate 87 is fixedly connected to the limiting ring 71, it will drive the conductive terminal 88 forward, pass through the insulating curtain 84, and enter the conductive groove 85. During this process, the limiting ring 71 slides in the sliding groove 79 through the slide rod 78. In other words, the limiting ring 71 does not... It is possible for it to detach because the limiting ring 71 is limited to slide within the slide groove 79 by the slide rod 78, and the sliding distance is limited. Its sliding distance is precisely between the conductive clips 86 where the conductive terminal 88 is fully inserted into the conductive groove 85. Secondly, when the limiting ring 71 slides forward within the slide groove 79 via the slide rod 78, the connecting rods 72 at both ends of the limiting ring 71 also drive the limiting wedges 73 to advance on the clamping plate 42. Because the connecting rods 72 have a certain degree of toughness, the front limiting wedges 73 always move on the surface of the clamping plate 42. (Refer to...) Figure 8 As shown, until the limiting wedge 73 is engaged in the receiving groove 75, the limiting ring 71 advances to complete the first step. The next step is to continue advancing the limiting ring 71 so that the limiting wedge 73 passes over the fixed wedge 744 and is engaged in the fixed groove 76, thus completing the limiting of the limiting wedge 73 by the fixed wedge 744, and thus completing the limiting of the limiting ring 71. At this time, the conductive terminal 88 also completes the conductive connection between the conductive clip 86 and the conductive groove 85. Secondly, when the DC terminal 5 is inserted into the DC slot 43, a layer of thermal grease is applied to the inner side of the thermally conductive spring 742. Since there is an angle between the thermally conductive spring 742 and the fixing spring 741, and the thermally conductive spring 742 is compatible with the structure of the DC slot 43, the DC terminal 5 will squeeze the thermally conductive spring 742 when it is inserted, so that the DC terminal 5 can be completely pressed against the thermally conductive spring 742 before being inserted into the DC slot 43. This can greatly improve the subsequent heat conduction efficiency and reduce the heat conduction response lag. Next, the cable end is wound around the bolt 95, and then the bolt 95 is inserted into the end of the conductive cone plate 93 and rotated. Since there are several protrusions 96 below the bolt 95, the cable end will be wound around when the bolt 95 is rotated, thereby tightening the conductive cone plate 93 and causing the conductive cone plate 93 to move away from the conductive disk 87. This causes the return spring 94 to be in a stretched state until the various limiting blocks around the front end of the conductive cone plate 93 move to the rear end of the limiting groove 92 and stop. At this point, the task is completed as follows: Figure 15 The overall installation of the conductive and tripping components is shown.

[0030] See Figure 16 As shown in the process, when overheating occurs, the temperature is first transferred to the entire thermally conductive spring 742 through the thermally conductive silicone. Since the trip spring 74 is a single unit, the temperature is quickly transferred to the deformable spring 743, causing the deformable spring 743 to deform into a preset state, that is, to restore the memory state. This causes the angle between the deformable spring 743 and the fixed spring 741 to change from greater than 30° to less than 30°. Figure 8 As can be seen, the downward displacement of the deformable spring 743 causes the fixed wedge 744 to move downward, thereby releasing the restriction on the limiting wedge 73. Subsequently, the entire limiting ring 71 and its fixed conductive disk 87 move backward under the elastic force of the return spring 94, thereby causing the conductive terminal 88 to be pulled out from the conductive groove 85 to complete the power cut-off, until the slide rod 78 reaches the end of the slide groove 79, the front end of the conductive cone plate 93 reaches the front end of the limiting groove 92, and the limiting wedge 73 also reaches the end of the receiving groove 75. Thus, because the limiting wedge 73 is released from restriction, it moves backward under the elastic force of the conductive cone plate 93 to complete the power cut-off protection. After the crisis is resolved, after the tripping spring 74 cools down, it is necessary to manually restore the position of the limiting ring 71, so that the limiting wedge 73 can be re-engaged into the fixed groove 76, and the corresponding conductive terminal 88 can be re-inserted into the conductive groove 85 to complete the restoration of conductivity.

[0031] In summary, this effectively addresses the single-point failure risk at the core power terminals (DC+ / DC-) of existing charging piles that rely solely on electronic temperature control systems. Furthermore, existing mechanical redundancy solutions face dual bottlenecks of thermal coupling hysteresis and low conductivity efficiency. Therefore, it is urgent to construct a non-electrically controlled mechanical overheat protection mechanism that combines efficient heat conduction paths with low impedance current carrying characteristics to provide reliable physical power-off protection in the event of electronic system failure.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A new energy vehicle charging pile with temperature monitoring, comprising a pressure plate (4) and various terminals disposed thereon, characterized in that: A clamping plate (42) is symmetrically arranged on both sides of the pressure plate (4). A DC slot (43) is formed in the clamping plate (42). A DC terminal (5) is arranged in the DC slot (43). A limit component (7) is arranged at the end of the DC terminal (5). A conductive component (8) is arranged in the limit component (7). A tension component (9) is arranged at the end of the conductive component (8). The tension component (9) is connected to the cable. The limiting component (7) includes a limiting ring (71) that is slidably disposed on the card plate (42). A trip spring (74) is disposed inside the card plate (42). One side of the trip spring (74) is attached to the surface of the DC terminal (5), and the other side of the trip spring (74) is engaged with the limiting ring (71). The conductive component (8) includes a fixed disk (81) electrically connected to the end of the DC terminal (5). The fixed disk (81) has several conductive grooves (85) inside. A conductive disk (87) is provided inside the limiting ring (71). The conductive disk (87) has conductive terminals (88) that correspond one-to-one with the conductive grooves (85). The stretching assembly (9) includes a conductive cone plate (93) that is elastically connected to the end of the conductive disk (87); First stage: The temperature of DC terminal (5) rises, and the trip spring (74) returns to its original shape; Second stage: The limiting ring (71) moves back and resets through the conductive cone plate (93), causing several conductive terminals (88) to move back and cut off the electrical connection between the conductive terminals (88) and the fixed plate (81).

2. The new energy vehicle charging pile with temperature monitoring according to claim 1, characterized in that: It also includes a charging pile body (1) and a charging gun body (2) set on the charging pile body (1). A protective cover (3) is provided at the end of the charging gun body (2), and a pressure plate (4) is set inside the protective cover (3).

3. The new energy vehicle charging pile with temperature monitoring according to claim 1, characterized in that: The front end of the fixed plate (81) is fixedly connected to a tapered connector (82). The tapered connector (82) has a tapered structure, and the outer diameter of the end of the tapered connector (82) is adapted to the inner diameter of the end of the DC terminal (5).

4. The new energy vehicle charging pile with temperature monitoring according to claim 1, characterized in that: The fixing disk (81) is disposed in the docking assembly (6). The docking assembly (6) includes a docking ring (61). The fixing disk (81) is fixedly connected in the docking ring (61). A plurality of docking heads (62) are fixedly provided on one side of the front end of the docking ring (61). The end of the card plate (42) is provided with docking grooves (63) that correspond one-to-one with the docking heads (62). A docking block (64) that is adapted to the docking heads (62) is fixedly provided in the docking groove (63).

5. The new energy vehicle charging pile with temperature monitoring according to claim 4, characterized in that: Both the conductive groove (85) and the conductive terminal (88) are tapered. The end of the conductive groove (85) is adapted to the inner diameter of the end of the DC terminal (5). Several conductive clips (86) are circumferentially fixed in the front end of the conductive groove (85). The end of the conductive clips (86) is L-shaped, and the ends of the several conductive clips (86) form a lotus-shaped structure. The inner diameter formed by the end of the lotus-shaped structure is smaller than the outer diameter of the front end of the conductive terminal (88).

6. The new energy vehicle charging pile with temperature monitoring according to claim 5, characterized in that: An insulating sheet (83) is fixedly connected to the end of the docking ring (61). The insulating sheet (83) is provided with a plurality of insulating curtains (84) that correspond one-to-one with and are adapted to the conductive grooves (85). The insulating curtains (84) include a plurality of curtain petals (841) arranged in a circumferential manner. The plurality of curtain petals (841) are tightly fitted together to form a circular piece. A reset ring (842) is fixedly provided on the edge of the curtain petal (841). The distance from the top of the conductive clip (86) to the curtain petal (841) is greater than the radius of the insulating curtain (84).

7. The new energy vehicle charging pile with temperature monitoring according to claim 6, characterized in that: The limiting ring (71) is fixed with a plurality of sliding rods (78) in a circumferential direction. The end of the docking ring (61) is provided with a sliding groove (79) that corresponds to and is adapted to the sliding rods (78). The sliding rods (78) are slidably connected in the sliding groove (79). Two sets of connecting rods (72) are symmetrically fixed on the limiting ring (71). The front end of the connecting rod (72) is fixedly connected to the limiting wedge (73). The card plate (42) is symmetrically provided with slots corresponding to the limiting wedge (73). The slots are a receiving slot (75) and a fixing slot (76) opened sequentially along the sliding direction of the limiting wedge (73). The card plate (42) is also provided with a movable slot (77). The receiving slot (75), the fixing slot (76) and the movable slot (77) are interconnected. The release spring (74) includes a fixed spring (741) fixed in the card plate (42), the bottom of the fixed spring (741) is fixedly connected to a heat-conducting spring (742) in the DC card slot (43), the heat-conducting spring (742) is adapted to the structure of the DC card slot (43), and there is an included angle between the heat-conducting spring (742) and the fixed spring (741); the top of the fixed spring (741) is fixedly connected to a deformable spring (743) in the movable groove (77), and the end of the deformable spring (743) is fixedly connected to a fixed wedge (744) adapted to the limiting wedge (73).

8. The new energy vehicle charging pile with temperature monitoring according to claim 7, characterized in that: The trip spring (74) is made of nickel-titanium alloy and has deformation memory properties; In the initial state, the angle between the deformable spring sheet (743) and the fixed spring sheet (741) is greater than 30°; When the temperature rises to the preset temperature of 63-67°C, the angle between the deformable spring sheet (743) and the fixed spring sheet (741) decreases to within 15°; and at this time, the fixed wedge block (744) and the limiting wedge block (73) disengage.

9. The new energy vehicle charging pile with temperature monitoring according to claim 8, characterized in that: The stretching assembly (9) includes a conductive sleeve (91) fixedly connected to the end of the conductive disk (87). The conductive sleeve (91) has several circumferentially oriented limiting grooves (92). The conductive cone plate (93) is slidably connected to the conductive sleeve (91) through the limiting grooves (92). A return spring (94) is provided inside the conductive sleeve (91). The front end of the conductive cone plate (93) is connected to the conductive disk (87) through the return spring (94). A bolt (95) is threadedly connected to the end of the conductive cone plate (93). Several protrusions (96) are fixedly connected to the bottom of the bolt (95).

10. The new energy vehicle charging pile with temperature monitoring according to claim 9, characterized in that: In the initial state, the reset spring (94) is in a stretched state, and the length of the limiting groove (92), the length of the sliding groove (79), and the distance from the fixed wedge (744) to the end of the receiving groove (75) are adapted to the length of the conductive terminal (88); When the conductive terminal (88) is disconnected from the insulating curtain (84), the limiting wedge (73) is attached to the end of the receiving groove (75), the front end of the sliding rod (78) is attached to the end of the sliding groove (79), the reset spring (94) returns to the unstretched state, and the front end of the conductive cone plate (93) is attached to the front end of the limiting groove (92).

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