V2G charging pile with overheat protection function

Abstract

The application discloses a V2G charging pile with overheating protection function, and relates to the technical field of V2G charging piles.The charging pile comprises a main shell, a main control module and a charging assembly.The main shell is located on a horizontal ground, and a cavity is arranged in the main shell.The main control module is located in the cavity, and a fixed end of the main control module is fixedly connected with the inner wall of the main shell.A protection assembly is arranged in the main shell, and the protection assembly is used for providing temperature buffering.A cooling assembly is arranged on one side of the protection assembly, and the cooling assembly is located on the side of the protection assembly away from the main control module.The charging assembly is arranged on both sides of the main shell, and the charging assembly is electrically connected with the main control module.

Description

Technical Field

[0001] This invention relates to the field of V2G charging pile technology, specifically a V2G charging pile with overheat protection function. Background Technology

[0002] V2G charging piles are a type of charging pile that allows electric vehicles to transmit energy bidirectionally to the power grid. They can absorb energy from the power grid to charge electric vehicles during off-peak hours and feed the energy from the electric vehicle's energy storage unit back to the power grid during peak hours, thus playing a role in peak shaving and valley filling for the power grid.

[0003] While existing V2G charging stations cool the power supply unit during operation, the cooling coverage is wide, the cooling efficiency is low, and the energy consumption is high. Furthermore, when voltage spikes or current surges occur in the power grid, causing instantaneous voltage or current changes, local connection points can quickly generate high temperatures. The cooling unit built into the charging station cannot respond quickly enough, or it cannot control the temperature of high-temperature points as soon as the charging station starts charging, resulting in damage to the connection points caused by localized high temperatures. Summary of the Invention

[0004] The purpose of this invention is to provide a V2G charging pile with overheat protection function to solve the problems raised in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The charging pile includes a main shell, a main control module, and charging components. The main shell is located on a horizontal ground and has a cavity inside. The main control module is located in the cavity, and the fixed end of the main control module is fixedly connected to the inner wall of the main shell. The main shell has a protection component inside, which provides temperature buffer. A cooling component is located on one side of the protection component, away from the main control module. The charging components are located on both sides of the main shell and are wired to the main control module.

[0007] Specifically, charging piles are the infrastructure for charging electric vehicles. When a charging pile is working, the high voltage flowing inside causes some components to generate high temperatures. The bottom of the main casing is fixedly connected to the horizontal ground. The main casing has a cavity inside for housing the main control module. The main control module includes a power supply unit and a main control unit. After the power supply unit is powered on, some connection points will heat up rapidly, which the cooling unit built into the charging pile cannot handle quickly. Otherwise, it will not be able to control the temperature of the high-temperature points as the charging pile starts working. The protection component is used to cool and buffer the high-temperature points of the main control module and locate the high-temperature points, thereby assisting the cooling component to perform targeted local cooling, achieving efficient use of energy, reducing the working time and switching frequency of the cooling component, and improving its service life. The charging component is used to connect to the charging port of the new energy vehicle.

[0008] The protection assembly includes two upright plates and a phase change block. The left and right ends of the two upright plates are fixedly connected to the inner wall of the outer casing. Multiple baffles are provided between the two upright plates. Sealing plates are provided at the upper and lower ends of the two upright plates. The sealing plates are fixedly connected to the upright plates. The multiple baffles are fixedly connected to the upright plates. A vertical groove is formed between the two baffles. The phase change block is located in the vertical groove. A limiting component is provided on the inner wall of the vertical groove. The limiting component is used to control the position of the phase change block.

[0009] Specifically, the protection component is located inside the main housing, on the side of the main housing away from the flip door. A sealed space is formed between the two upright plates, and this sealed space is divided into multiple independent spaces by multiple baffles and sealing plates. These multiple spaces are vertical grooves and are not interconnected. The phase change block is located in the vertical groove. The phase change block is composed of paraffin wax and palmitic acid. The phase change block is normally solid. When the charging pile is working, the phase change block will absorb heat. Because the phase change block is vertical and has multiple forming planes parallel to the main control module, when the main control module generates local high temperature, the corresponding phase change block will absorb heat and change from solid to liquid. The corresponding solid phase change block will move downward due to its own weight and continue to absorb heat. The limiting component is located on both sides of the phase change block. Through its own structure and cooperation with the phase change block, it can determine and control the overall shape of the phase change block.

[0010] The limiting component includes multiple hinge plates, each with a top cover that snaps into the hinge plate. A limiting component is provided between the multiple hinge plates to prevent the hinge plates from folding inward. A detection component is provided on the side of the hinge plate closest to the baffle. A tensioning component is provided at the top of the sealing plate to straighten the hinge plates. The limiting component includes a cylinder and a semicircular block. The cylinder is located between two hinge plates and is hinged to the cylinder. Two semicircular blocks are provided on the side of the hinge plate closest to the baffle and are fixedly connected to the hinge plate.

[0011] Specifically, multiple hinge plates are located on both sides of the phase change block. Two hinge plates are connected by a limiting component, forming two upright plates on either side of the phase change block. These hinge plates restrict the position of the phase change block. Normally, the hinge plates are upright, keeping the phase change block vertical. During operation, due to localized high temperatures, the phase change block absorbs heat and changes from solid to liquid. Because the hinge plates are hinged to the cylinder, those that are on the same horizontal line as the liquid phase change block lose support. Furthermore, the weight of the solid phase change block on top of the liquid phase change block compresses the hinge plates, causing them to fold. After operation, i.e., when charging is complete, the tensioning component... The hinge plate is used to straighten the folded hinge plate. Under the influence of the external temperature and the residual temperature of the cooling component, the liquid phase change block will turn into a solid phase change block, causing the protection component to return to its original state. The detection component detects whether the hinge plate has folded, thereby indirectly determining the high temperature position. The limiting component is used to restrict the folding direction of the hinge plate, preventing it from folding inward and allowing it to fold only once towards the baffle. Folding inward reduces the space, and since the volume of the phase change block remains unchanged, the solid phase change block at the top cannot move downward. Folding inward also reduces the space, which in turn affects the folding angle of the hinge plate, ultimately affecting the detection results of the detection component.

[0012] The detection assembly includes an external plate and an electrode plate. The external plate is located on the side of the hinge plate close to the baffle. The external plate is fixedly connected to the hinge plate. There is a space inside the external plate. The electrode plate is located inside the external plate and is fixedly connected to the inside of the external plate.

[0013] Specifically, there are multiple detection components, the same number as the hinge plates. Two detection components on the same side that are close together form a group. The electrode plates in a group of detection components are electrically connected to each other. During operation, when the solid phase change block absorbs heat and turns into a liquid phase change block, the hinge plate on the same horizontal line will fold towards the side closer to the baffle. This causes the external plate, which is fixedly connected to the hinge plate, to move, and the position of the electrode plate will also change. Ultimately, this will change the distance between the two electrode plates in the same group. The closer the distance between the two electrode plates, the larger the capacitance value; the farther the distance, the smaller the capacitance value. When the capacitance value increases, it means that the solid phase change block on the corresponding horizontal line has turned into a liquid, which means that the corresponding point has generated high temperature. Then, the temperature level and range are determined by the detection results of adjacent detection components. When the capacitance value of adjacent detection components also increases, it means that the local temperature is extremely high and has affected other areas, or the high temperature range is too large.

[0014] The tensioning assembly includes a rotating motor and a rotating rod. The rotating motor is located on one side of the main housing, and its fixed end is fixedly connected to the main housing. The rotating rod is located at the top of the sealing plate, with one end rotatably connected to the inner wall of the main housing and the other end fixedly connected to the output end of the rotating motor. A pulling member is provided at the top of the top cover, and a through hole is provided on the sealing plate. One end of the pulling member is fixedly connected to the top of the top cover, and the other end of the pulling member passes through the through hole and is fixedly connected to the rotating rod.

[0015] Specifically, the rotating motor acts as a power source to control the rotation of the rotating rod. The rotation of the rotating rod causes the pulling component to move upward, which in turn causes the top cover to move. The top cover then causes the hinge plate to move, which in turn causes adjacent hinge plates to move. Ultimately, the rotating motor straightens the hinge plate, making it an upright plate to restrict the phase change block. Normally, the rotating motor is in a retracted state, restricting the movement of the tensioning component and keeping the hinge plate upright. When the charging pile is working, the rotating motor relaxes, providing movable space for the top cover and allowing the hinge plate to fold. After the charging pile is fully charged, the rotating motor operates again, pulling the tensioning component into a retracted state.

[0016] The cooling assembly includes a main thermocouple assembly, a secondary thermocouple assembly, a substrate, and a heat sink. The substrate is located inside the main housing and on the side of the upright plate away from the main control module. The main thermocouple assembly is located on one side of the substrate, and the secondary thermocouple assembly is located on the other side of the substrate. The main thermocouple assembly and the secondary thermocouple assembly are electrically connected. The heat sink is located on the side of the substrate away from the main thermocouple assembly and is fixedly connected to the inner wall of the main housing.

[0017] Specifically, the main thermocouple assembly is located on the side of the substrate closest to the upright plate, and is fixedly connected to the substrate. The auxiliary thermocouple assembly is also fixedly connected to the substrate. Both the main and auxiliary thermocouple assemblies are composed of multiple thermocouple blocks, and are electrically connected to each other, so that the thermocouple blocks in both assemblies form a closed circuit. When current passes through the circuit composed of two different conductors, a temperature difference will be generated at the connection point. One connection point will absorb heat and become the cold junction, while the other connection point will release heat and become the hot junction. The main thermocouple assembly is the cold junction, and the auxiliary thermocouple assembly is the hot junction. The substrate provides mechanical support and electrical insulation, and the heat sink is located on the side of the hot junction to dissipate heat to the surrounding environment. When the charging pile is working, the main thermocouple assembly determines whether to be energized based on the capacitance value of the electrode plate. When the capacitance value at a certain point increases, the nearby thermocouple block will be energized, and the temperature of the cold junction will decrease. When the range of capacitance value changes expands, the energization range of the thermocouple will also expand.

[0018] Phase change blocks consist of paraffin and palmitic acid.

[0019] Specifically, paraffin wax and palmitic acid are mixed in a 6:4 ratio, with a eutectic melting point of 30°C-40°C, thus adapting to the temperature generated when the main control module is working.

[0020] The charging assembly includes a charging slot and a charging gun. The charging slot is located on both sides of the housing, and the output end of the charging gun is engaged with the charging slot.

[0021] Specifically, the main housing has charging slots on both sides, and two charging guns are provided accordingly. The input end of the charging gun is electrically connected to the main control module. Due to the improved heat dissipation, the working efficiency of the charging pile can also be improved.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. In operation, due to the influence of local high temperature, the phase change block absorbs heat and changes from solid to liquid. Since the hinge plate is hinged to the cylinder and is on the same horizontal line as the liquid phase change block, the hinge plate loses support. Furthermore, the weight of the solid phase change block on top of the liquid phase change block compresses the hinge plate, causing the hinge plate to fold. The phase change block on top also moves downward, thereby continuing to cool down the high temperature point. The high temperature point is cooled and buffered to prevent rapid heating from damaging the connection point.

[0024] 2. In this invention, the folding of the hinge plate causes the corresponding external plate to move, which in turn causes the electrode plate to change position. Ultimately, this changes the distance between the two electrode plates in the same group, increases the capacitance between the two electrode plates, and indicates that the solid phase change block on the corresponding horizontal line becomes liquid, which means that the corresponding point generates high temperature.

[0025] 3. When the capacitance value at a certain point increases, the nearby thermocouple block will be energized, and the cold junction will cool down. When the range of capacitance value changes expands, the energization range of the thermocouple will also expand. Finally, the main thermocouple group and the phase change block together cool down the main control module, improving the cooling efficiency.

[0026] 4. After the work is completed, that is, after charging is finished, the rotating motor is used as a power source to control the rotation of the rotating rod, thereby driving the hinge plate to move. The hinge plate will drive the adjacent hinge plates to move, forming an upright plate to restrict the liquid phase change block. Then, under the influence of the external temperature and the residual temperature of the cooling component, the liquid phase change block will become a solid phase change block, so that the protection component returns to its original state. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the charging component of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the protective component of the present invention;

[0030] Figure 4 For the present invention Figure 3 Enlarged view of section A in the middle;

[0031] Figure 5 This is a schematic diagram of the structure of the limiting component of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the stretching component of the present invention;

[0033] Figure 7 This is a schematic diagram of the detection component of the present invention;

[0034] Figure 8 This is a schematic diagram of the cooling component of the present invention.

[0035] In the diagram: 1. Main casing; 2. Main control module; 3. Protection components; 31. Vertical plate; 32. Phase change block; 33. Baffle; 34. Sealing plate; 4. Cooling components; 41. Main thermocouple; 42. Auxiliary thermocouple; 43. Base plate; 44. Heat sink; 5. Charging components; 6. Limiting components; 61. Hinge plate; 62. Top cover; 7. Limiting components; 71. Cylinder; 72. Semicircular block; 8. Detection components; 81. External plate; 82. Electrode plate; 9. Tensioning components; 91. Rotating motor; 92. Rotating rod; 93. Pulling component. Detailed Implementation

[0036] 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.

[0037] Example: Figures 1-8 As shown, the present invention provides a V2G charging pile technical solution with overheat protection function. The charging pile includes a main shell 1, a main control module 2 and a charging component 5. The main shell 1 is located on a horizontal ground. A cavity is provided inside the main shell 1. The main control module 2 is located in the cavity. The fixed end of the main control module 2 is fixedly connected to the inner wall of the main shell 1. A protection component 3 is provided inside the main shell 1. The protection component 3 is used to provide temperature buffer. A cooling component 4 is provided on one side of the protection component 3. The cooling component 4 is located on the side of the protection component 3 away from the main control module 2. The charging component 5 is located on both sides of the main shell 1. The charging component 5 is wiredly connected to the main control module 2.

[0038] Specifically, the charging pile is the infrastructure for charging electric vehicles. When the charging pile is working, the high voltage flowing inside will cause some components to generate high temperatures. The bottom of the main shell 1 is fixedly connected to the horizontal ground. The main shell 1 has a cavity inside for housing the main control module 2. The main control module 2 includes a power supply unit and a main control unit. After the power supply unit is powered on, some connection points will heat up rapidly. As a result, the cooling unit built into the charging pile cannot cope with the temperature quickly enough. Otherwise, as the charging pile starts working, it will not be able to control the temperature of the high-temperature points. The protection component 3 is used to cool and buffer the high-temperature points of the main control module 2 and locate the high-temperature points, thereby assisting the cooling component 4 to perform localized cooling, which will improve the efficiency of energy utilization, reduce the working time and switching frequency of the cooling component 4, and improve its service life. The charging component 5 is used to connect to the charging port of the new energy vehicle.

[0039] like Figures 3-6 As shown, the protection component 3 includes a vertical plate 31 and a phase change block 32. There are two vertical plates 31. The left and right ends of the two vertical plates 31 are fixedly connected to the inner wall of the outer shell. Multiple baffles 33 are provided between the two vertical plates 31. Sealing plates 34 are provided at the upper and lower ends of the two vertical plates 31. The sealing plates 34 are fixedly connected to the vertical plates 31. Multiple baffles 33 are fixedly connected to the vertical plates 31. A vertical groove is formed between the two baffles 33. The phase change block 32 is located in the vertical groove. A limiting component 6 is provided on the inner wall of the vertical groove. The limiting component 6 is used to control the position of the phase change block 32.

[0040] Specifically, the protection component 3 is located inside the main housing 1, and on the side of the main housing 1 away from the flip door. A sealed space is formed between the two upright plates 31. This sealed space is divided into multiple independent spaces by multiple baffles 33 and sealing plates 34. These multiple spaces are vertical grooves and are not interconnected. The phase change block 32 is located in the vertical groove. The phase change block 32 is composed of a combination of paraffin wax and palmitic acid, with a 6:4 ratio of paraffin wax to palmitic acid. The eutectic melting point is 30°C-40°C, thus adapting to the temperature generated during the operation of the main control module 2. Phase change block 32 is normally in a solid state. When the charging pile is working, phase change block 32 will absorb heat. Since phase change block 32 is in a vertical state and has multiple forming planes, parallel to the main control module 2, when the main control module 2 generates local high temperature, the corresponding phase change block 32 will absorb heat and change from solid to liquid. The corresponding solid phase change block 32 will move downward due to its own weight and continue to absorb heat. The limiting component 6 is located on both sides of phase change block 32. Through its own structure and cooperation with phase change block 32, the overall shape of the phase change block 32 can be determined.

[0041] like Figures 3-6As shown, the limiting component 6 includes a hinge plate 61, and multiple hinge plates 61 are provided. A top cover 62 is provided at the top of the hinge plate 61, and the top cover 62 is snapped into the hinge plate 61. A limiting component 7 is provided between the multiple hinge plates 61. The limiting component 7 is used to prevent the hinge plates 61 from folding inward. A detection component 8 is provided on the side of the hinge plate 61 close to the baffle 33. A tension component 9 is provided at the top of the sealing plate 34. The tension component 9 is used to straighten the hinge plate 61. The limiting component 7 includes a cylinder 71 and a semicircular block 72. The cylinder 71 is located between two hinge plates 61, and the two hinge plates 61 are hinged to the cylinder 71. Two semicircular blocks 72 are provided. The two semicircular blocks 72 are located on the side of the hinge plate 61 close to the baffle 33, and the two semicircular blocks 72 are fixedly connected to the hinge plate 61.

[0042] Specifically, multiple hinge plates 61 are located on both sides of the phase change block 32. Two hinge plates 61 are connected by a limiting component 7, thus forming two upright plates on both sides of the phase change block 32. This allows the hinge plates 61 to restrict the position of the phase change block 32. Normally, the hinge plates 61 are in an upright state, keeping the phase change block 32 vertical. During operation, due to localized high temperatures, the phase change block 32 absorbs heat and changes from a solid to a liquid state. Because the hinge plates 61 are hinged to the cylinder 71, and are on the same horizontal line as the liquid phase change block 32, they lose support. Furthermore, the weight of the solid phase change block 32 on top of the liquid phase change block 32 presses against the hinge plates 61, causing them to fold. After operation, i.e., when charging is complete, the hinge plates 61 fold. The stretching component 9 is used to straighten the folded hinge plate 61. Then, under the influence of the external temperature and the residual temperature of the cooling component 4, the liquid phase change block 32 will become a solid phase change block 32, so that the protection component 3 returns to its original state. The detection component 8 detects whether the hinge plate 61 has folded, thereby indirectly determining the high temperature position. The limiting component 7 is used to limit the folding direction of the hinge plate 61, so that the hinge plate 61 cannot fold inward, but can only fold once close to the baffle 33. This prevents the solid phase change block 32 at the top from moving downward because folding inward would reduce the space and the volume of the phase change block 32 remains unchanged. Folding inward would reduce the space and thus affect the folding angle of the hinge plate 61, ultimately affecting the detection result of the detection component 8.

[0043] like Figure 7 As shown, the detection component 8 includes an outer plate 81 and an electrode plate 82. The outer plate is located on the side of the hinge plate 61 close to the baffle 33. The outer plate 81 is fixedly connected to the hinge plate 61. A space is opened inside the outer plate 81. The electrode plate 82 is located inside the outer plate 81 and is fixedly connected to the inside of the outer plate 81.

[0044] Specifically, there are multiple detection components 8, the same number as the hinge plates 61. Two detection components 8 that are close to each other on the same side are grouped together. The electrode plates 82 in a group of detection components 8 are electrically connected to each other. During operation, when the solid phase change block 32 absorbs heat and turns into a liquid phase change block 32, the hinge plate 61 on the same horizontal line will fold towards the side close to the baffle 33. This causes the external plate 81, which is fixedly connected to the hinge plate 61, to move. Consequently, the position of the electrode plates 82 will also change, ultimately causing the distance between the two electrode plates 82 in the same group to change. The closer the distance between the two electrode plates 82, the larger the capacitance value. The farther the distance, the smaller the capacitance value. When the capacitance value increases, it means that the solid phase change block 32 on the corresponding horizontal line has turned into a liquid, which means that the corresponding point has generated high temperature. Then, the temperature level and range are judged by the detection results of the adjacent detection components 8. When the capacitance value of the adjacent detection components 8 also increases, it means that the local temperature is extremely high and has affected other areas, or the high temperature range is too large.

[0045] like Figure 6 As shown, the tensioning assembly 9 includes a rotating motor 91 and a rotating rod 92. The rotating motor 91 is located on one side of the main housing 1, and the fixed end of the rotating motor 91 is fixedly connected to the main housing 1. The rotating rod 92 is located at the top of the sealing plate 34. One end of the rotating rod 92 is rotatably connected to the inner wall of the main housing 1, and the other end of the rotating rod 92 is fixedly connected to the output end of the rotating motor 91. The top of the top cover 62 is provided with a pulling member 93. A through hole is provided on the sealing plate 34. One end of the pulling member 93 is fixedly connected to the top of the top cover 62, and the other end of the pulling member 93 passes through the through hole and is fixedly connected to the rotating rod 92.

[0046] Specifically, the rotary motor 91 serves as a power source to control the rotation of the rotating rod 92. The rotation of the rotating rod 92 causes the pulling member 93 to move upward. The movement of the pulling member 93 causes the top cover 62 to move. The movement of the top cover 62 causes the hinge plate 61 to move. The movement of the hinge plate 61 causes the adjacent hinge plate 61 to move. Finally, the rotary motor 91 straightens the hinge plate 61, making it an upright plate to restrict the phase change block 32. The rotary motor 91 is normally in a retracted state to restrict the movement of the tensioning member and keep the hinge plate 61 in an upright state. When the charging pile is working, the rotary motor 91 will relax to provide movable space for the top cover 62, allowing the hinge plate 61 to fold. When the charging pile is fully charged, the rotary motor 91 will work again to pull the pulling member 93 into a retracted state.

[0047] like Figure 8As shown, the cooling component 4 includes a main thermocouple group 41, a secondary thermocouple group 42, a substrate 43, and a heat sink 44. The substrate 43 is located inside the main housing 1 and is located on the side of the upright plate 31 away from the main control module 2. The main thermocouple group 41 is provided on one side of the substrate 43, and the secondary thermocouple group 42 is provided on the other side of the substrate 43. The main thermocouple group 41 and the secondary thermocouple group 42 are electrically connected. The heat sink 44 is located on the side of the substrate 43 away from the main thermocouple group 41 and is fixedly connected to the inner wall of the main housing.

[0048] Specifically, the main thermocouple group 41 is located on the side of the substrate 43 close to the vertical plate 31. The main thermocouple 41 is fixedly connected to the substrate 43, and the auxiliary thermocouple group 42 is also fixedly connected to the substrate 43. The main thermocouple group 41 and the auxiliary thermocouple group 42 are composed of multiple thermocouple blocks, and are electrically connected to each other, so that the thermocouple blocks in both groups form a closed circuit. Therefore, when current passes through the circuit composed of two different conductors, a temperature difference will be generated at the connection point, and one connection point will absorb heat and become a cold junction. Another connection point releases heat as the hot end, where the main thermocouple group 41 is the cold end and the auxiliary thermocouple group 42 is the hot end. The substrate 43 is used to provide mechanical support and electrical insulation. The heat sink 44 is located on one side of the hot end to dissipate heat to the surrounding environment. When the charging pile is working, the main thermocouple group 41 determines whether to be energized based on the capacitance value of the electrode plate 82. When the capacitance value at a certain point increases, the nearby thermocouple block will be energized, and the temperature of the cold end will decrease. When the range of capacitance value changes expands, the energization range of the thermocouple will also expand.

[0049] like Figure 5 As shown, phase change block 32 is composed of paraffin and palmitic acid.

[0050] Specifically, paraffin wax and palmitic acid are mixed in a 6:4 ratio, with a eutectic melting point of 30°C-40°C, thus adapting to the temperature generated when the main control module is working.

[0051] like Figure 1 , Figure 2 As shown, the charging component 5 includes a charging slot and a charging gun. The charging slot is located on both sides of the housing, and the output end of the charging gun is engaged with the charging slot.

[0052] Specifically, the main housing has charging slots on both sides, and two charging guns are provided accordingly. The input end of the charging gun is electrically connected to the main control module 2. Due to the improved heat dissipation, the working efficiency of the charging pile can also be improved.

[0053] Working principle: During operation, due to localized high temperatures, the phase change block 32 absorbs heat and changes from a solid to a liquid state. Because the hinge plate 61 is hinged to the cylinder 71, and is on the same horizontal line as the liquid phase change block 32, the hinge plate 61 loses its support. Furthermore, the weight of the solid phase change block 32 on top of the liquid phase change block 32 compresses the hinge plate 61, causing it to fold. This causes the external plate 81, which is fixedly connected to the hinge plate 61, to move, leading to a change in the position of the electrode plates 82. Ultimately, this alters the distance between the two electrode plates 82 in the same group, increasing the capacitance between them. This indicates that the solid phase change block 32 on the corresponding horizontal line has become liquid, meaning that a high temperature is generated at the corresponding point. When the capacitance at a certain point increases, the thermocouple block near that point will be energized. As the cold junction temperature decreases, the range of capacitance change expands, and the current-carrying range of the thermocouple also expands. Ultimately, the main thermocouple 41 and the phase change block 32 work together to cool the main control module 2. After the operation is completed, that is, after charging is finished, the rotating motor 91 is used as a power source to control the rotation of the rotating rod 92. The rotation of the rotating rod 92 will drive the pulling member 93 to move upward. The movement of the pulling member 93 will drive the top cover 62 to move. The movement of the top cover 62 will drive the hinge plate 61 to move. The movement of the hinge plate 61 will drive the adjacent hinge plate 61 to move. Finally, the operation of the rotating motor 91 straightens the hinge plate 61, making it an upright plate to restrict the liquid phase change block 32. Then, under the influence of the external temperature and the residual temperature of the cooling component 4, the liquid phase change block 32 will become a solid phase change block 32, so that the protection component 3 returns to its original state.

[0054] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A V2G charging pile with overheat protection function, characterized in that: The charging pile comprises a main shell (1), a main control module (2) and a charging assembly (5), the main shell (1) is located on the horizontal ground, the main shell (1) is internally provided with a cavity, the main control module (2) is located in the cavity, the fixed end of the main control module (2) is fixedly connected with the inner wall of the main shell (1), the main shell (1) is internally provided with a protection assembly (3), the protection assembly (3) is used for providing temperature buffering, one side of the protection assembly (3) is provided with a cooling assembly (4), the cooling assembly (4) is located on the side, away from the main control module (2), of the protection assembly (3), the charging assembly (5) is located on both sides of the main shell (1), and the charging assembly (5) is electrically connected with the main control module (2). The protection assembly (3) comprises vertical plates (31) and phase change blocks (32), the vertical plates (31) are provided with two, the left and right ends of the two vertical plates (31) are fixedly connected with the inner wall of the outer shell, a plurality of baffle plates (33) are arranged between the two vertical plates (31), the upper and lower ends of the two vertical plates (31) are provided with sealing plates (34), the sealing plates (34) are fixedly connected with the vertical plates (31), the plurality of baffle plates (33) are fixedly connected with the vertical plates (31), vertical grooves are formed between the two baffle plates (33), the phase change blocks (32) are located in the vertical grooves, and limiting assemblies (6) are arranged on the inner walls of the vertical grooves. The limiting assemblies (6) comprise hinge plates (61) and top covers (62), the hinge plates (61) are provided with a plurality of, the top ends of the hinge plates (61) are provided with the top covers (62), the top covers (62) are clampedly connected with the hinge plates (61), one side, close to the baffle plate (33), of the hinge plate (61) is provided with a detection assembly (8), the top end of the sealing plate (34) is provided with a stretching assembly (9), and the stretching assembly (9) is used for straightening the hinge plate (61). In working, the phase change blocks (32) change from solid state to liquid state, the hinge plates (61) lose support and are folded, the detection assembly (8) also changes position, which means that the corresponding point generates high temperature, the cooling assembly (4) close to the point is electrified, and the cooling assembly (4) and the phase change blocks (32) together cool the main control module (2).

2. The V2G charging pile with overheat protection function according to claim 1, characterized in that: Limiting assemblies (7) are arranged between the plurality of hinge plates (61), the limiting assemblies (7) are used for placing the hinge plates (61) to be folded inward, the limiting assemblies (7) comprise cylinders (71) and semicircular blocks (72), the cylinders (71) are located between the two hinge plates (61), the two hinge plates (61) are hingedly connected with the cylinders (71), the semicircular blocks (72) are provided with two, the two semicircular blocks (72) are located on one side, close to the baffle plate (33), of the hinge plate (61), and the two semicircular blocks (72) are fixedly connected with the hinge plate (61).

3. The V2G charging pile with overheat protection function according to claim 2, characterized in that: The detection assembly (8) comprises an external plate (81) and an electrode plate (82), the external plate (81) is located on the side of the hinged plate (61) close to the baffle (33), the external plate (81) is fixedly connected with the hinged plate (61), and a space is formed in the internal part of the external plate (81); the electrode plate (82) is located in the internal part of the external plate (81) and is fixedly connected with the internal part of the external plate (81).

4. The V2G charging pile with overheat protection function according to claim 3, characterized in that: The stretching assembly (9) comprises a rotating motor (91) and a rotating rod (92), the rotating motor (91) is located on one side of the main shell (1), the fixed end of the rotating motor (91) is fixedly connected with the main shell (1), the rotating rod (92) is located at the top end of the sealing plate (34), one end of the rotating rod (92) is rotatably connected with the inner wall of the main shell (1), the other end of the rotating rod (92) is fixedly connected with the output end of the rotating motor (91), the top end of the hinged plate (61) is provided with a top cover (62), the top cover (62) is clampedly connected with the hinged plate (61), the top end of the top cover (62) is provided with a pulling piece (93), a through hole is formed in the sealing plate (34), one end of the pulling piece (93) is fixedly connected with the top of the top cover (62), and the other end of the pulling piece (93) penetrates through the through hole and is fixedly connected with the rotating rod (92).

5. The V2G charging pile with overheat protection function according to claim 4, characterized in that: The cooling assembly (4) comprises a main thermocouple (41) group, a secondary thermocouple (42) group, a base plate (43) and a radiator (44), the base plate (43) is located in the internal part of the main shell (1), the base plate (43) is located on the side of the vertical plate (31) away from the main control module (2), the base plate (43) is provided with the main thermocouple (41) group on one side, the base plate (43) is provided with the secondary thermocouple (42) group on the other side, the main thermocouple (41) group and the secondary thermocouple (42) group are electrically connected, and the radiator (44) is located on the side of the base plate (43) away from the main thermocouple (41) group and is fixedly connected with the inner wall of the main shell.

6. The V2G charging pile with overheat protection function according to claim 5, characterized in that: The phase change block (32) comprises paraffin and palmitic acid.

7. The V2G charging pile with overheat protection function according to claim 6, characterized in that: The charging assembly (5) comprises a charging slot and a charging gun, the charging slot is located on both sides of the outer shell, and the output end of the charging gun is matched with the charging slot.

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