A battery car charging protection device

Abstract

The application discloses a battery car charging protection device, which comprises a shell, a partition plate fixed in the shell to divide the shell into two layers, a charger module integrated on the bottom layer of the shell, output and input electric wires respectively connected with the charger module and passing through two ends of the bottom layer of the shell, and a charging connector connected with the free end of the output electric wire; the upper layer of the shell is provided with a pulling mechanism capable of automatically detecting when the charging pile fails to supply power or the battery car is fully charged, and automatically pulling out the charging connector from the charging port on the battery car; the battery car charging protection device can automatically detect the charging state of the charger and the running state of the charging pile, and automatically pull out the charging connector from the charging port of the battery car when the charging pile fails to supply power due to failure or the charger is fully charged, so as to avoid problems such as damage to the battery life of the battery car, long-time power-on heating of the charger, possible short circuit and spontaneous combustion, and play a role in protecting the charger and the battery of the battery car.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle charging technology, and more specifically, to an electric vehicle charging protection device. Background Technology

[0002] An electric bicycle charger is a charging device specifically designed for the batteries of electric bicycles. A charger typically includes a housing and a charging module integrated within the housing. The charging module generally includes an input filtering module, a high-voltage conversion module, an output rectification module, an intelligent control and protection module, a heat dissipation module, and output wires that connect to the mains power grid and input wires that connect to the electric bicycle's charging port. The output and input wires are each equipped with a power plug and a charging plug, respectively.

[0003] If, during the charging process of an electric bicycle, the charging station malfunctions and cannot provide power, or the electric bicycle's battery is fully charged, the following problems may occur if the charger's charging connector is not promptly unplugged from the electric bicycle's charging port: (1) Damage to the battery life of electric vehicles: When the battery enters the "float charging" state, maintaining 100% high voltage for a long time will accelerate the loss of internal electrolyte and the shedding of active materials, resulting in battery swelling, capacity reduction, and reduced range, which may be irreversible in severe cases.

[0004] (2) Increased safety risks: The charger heats up when powered on for a long time. If the components are aging or there are voltage fluctuations, it may cause short circuits or spontaneous combustion. The risk of battery thermal runaway increases under high temperature conditions, and in extreme cases, it may lead to explosion.

[0005] (3) Damaged charger and power consumption: The continuous operation of the charger components accelerates aging and increases the failure rate; although the power consumption of float charging is low, it still causes unnecessary power waste in the long term.

[0006] Therefore, the present invention urgently needs to solve the problem of providing a battery charging protection device that can automatically detect the charging status of the charger and the operating status of the charging pile during use, and can automatically unplug the charging connector from the charging port of the electric vehicle when the charging pile fails to supply power due to a fault or the charger is fully charged, so as to avoid damage to the battery life of the electric vehicle, the charger overheating due to prolonged power supply, and the potential for short circuits or spontaneous combustion if components age or encounter voltage fluctuations. Summary of the Invention

[0007] To address the aforementioned technical problems, the purpose of this invention is to overcome the limitations of existing technologies. In cases of power outages due to charging pile malfunctions or when the electric vehicle is fully charged, the charging module remains connected to the electric vehicle's charging port, thus preventing damage to the battery life, overheating of the charger due to prolonged power supply, potential short circuits or spontaneous combustion due to component aging or voltage fluctuations, and increased risk of battery thermal runaway at high temperatures, which could lead to explosions and damage to the charger and power consumption in extreme cases. This invention provides an electric vehicle charging protection device that automatically detects the charging status of the charger and the operating status of the charging pile during use. When the charging pile fails to supply power due to a malfunction or the charger is fully charged, it automatically disconnects the charging connector from the electric vehicle's charging port, preventing damage to the battery life, overheating of the charger due to prolonged power supply, and potential short circuits or spontaneous combustion due to component aging or voltage fluctuations.

[0008] To achieve the above objectives, the present invention provides a battery charging protection device, comprising: a housing, a partition horizontally fixed inside the housing to divide it into upper and lower layers, a charger module integrated on the bottom layer of the housing, an output wire and an input wire respectively connected to the charger module and passing through both ends of the bottom layer of the housing, and a charging connector connected to the free end of the output wire. The upper layer of the housing is equipped with a pull mechanism that can automatically detect when the charging pile is out of power or when the electric vehicle is fully charged, and can automatically pull the charging connector out of the charging port on the electric vehicle.

[0009] Preferably, the pulling mechanism includes: a moving plate, a driver, and a pulling rope; wherein, A movable plate is horizontally and movably arranged on the upper layer of the housing. Pull ropes are fixedly arranged parallel to each other on both sides of the charging connector of the output wire. The other ends of the two pull ropes pass through the upper layer of the housing from the end of the housing and are fixed on the movable plate. A driver for driving the movable plate to move is horizontally fixed on the partition near the pull ropes.

[0010] Preferably, the actuator includes: a drive housing, a drive piston, and a drive rod; wherein, The drive housing is horizontally fixed to the partition plate. A drive piston is horizontally and movably arranged inside the drive housing. A drive rod is horizontally fixed on the drive piston, which can pass horizontally through the end of the drive housing and be fixed to the moving plate. A first spring is sleeved on the drive rod inside the drive housing. The two ends of the first spring are respectively fixed on the drive housing and the drive piston. An air inlet pipe and an air outlet pipe communicating with the interior are respectively fixed at intervals on the end of the drive housing near the pull rope. A miniature air pump is fixedly arranged next to the drive unit. The air outlet end of the miniature air pump is connected to the air inlet pipe. A solenoid valve is arranged on the air outlet pipe, and the free end of the air outlet pipe passes vertically through the partition plate and extends to the bottom layer of the housing.

[0011] Preferably, the pulling mechanism further includes: a photoelectric sensor, a vibration sensor, and a control chip; wherein, Two wedge-shaped blocks are fixedly and symmetrically at intervals on the top cover of the housing. Status indicator lights and photoelectric sensors are fixedly and fixedly mounted on the inclined surfaces of the two wedge blocks. The status indicator lights are electrically connected to the charging module. The vibration sensor and the control chip are fixed on the partition. The photoelectric sensor, the vibration sensor and the micro air pump are electrically connected to the control chip.

[0012] Preferably, an exhaust pipe is horizontally fixed on the bottom layer of the housing next to the charger module. The free end of the exhaust pipe is fixed on the exhaust pipe and communicates with its interior. A plurality of nozzles communicating with its interior are evenly and horizontally fixed on the exhaust pipe facing the charger module.

[0013] Preferably, a partition strip is horizontally fixedly provided on the partition plate, and two guide rods are horizontally fixedly provided at intervals on the partition strip. The movable plate has guide holes that are horizontally and at intervals for the two guide rods to pass through. The movable plate is slidably mounted on the two guide rods through the two guide holes. Each guide rod facing away from the driver is fitted with a second spring, and the two ends of each second spring are horizontally fixed to the movable plate and the partition strip, respectively.

[0014] Preferably, the partition plate has a plurality of through holes that are evenly and vertically pierced through it.

[0015] Preferably, a plurality of rubber strips are uniformly fixedly disposed on the surface of the charging connector.

[0016] Preferably, a plurality of ring-shaped retainers are fixedly arranged at equal intervals on the output wire, and the retainers located on both sides of the output wire are respectively provided with clearance holes for the two pull ropes to pass through.

[0017] Preferably, straps are symmetrically fixed on both sides of the housing.

[0018] According to the above technical solution, the beneficial effects of the electric vehicle charging protection device provided by the present invention during use are as follows: (1) During the charging process, when a power outage is detected due to a charging pile failure or the electric vehicle is fully charged, the charging connector can be pulled out of the charging port of the electric vehicle through the pull-out mechanism. In the case of a power outage due to a charging pile failure or the electric vehicle being fully charged, the charging module is prevented from still being connected to the charging port of the electric vehicle, thereby avoiding damage to the battery life of the electric vehicle, the charger overheating due to prolonged power supply, and the possibility of short circuits or spontaneous combustion if components age or encounter voltage fluctuations. The risk of battery thermal runaway increases under high temperature conditions, and in extreme cases, it may lead to explosion and damage to the charger and power consumption.

[0019] (2) Before the driver starts working, the solenoid valve on the exhaust pipe is closed. Then, the micro air pump is started to draw in external gas through the housing and into the micro air pump. The gas enters the interior of the driver housing from the bottom through the intake pipe and drives the rubber drive piston toward the moving plate. At the same time, the drive piston drives the drive rod to push the moving plate so that the two pull ropes change from a slack state to a taut state. As the moving plate continues to move, it drives the charging connector to be pulled out of the charging port of the electric vehicle. When the charging connector is pulled out, the micro air pump stops working. Then, the solenoid valve on the exhaust pipe of the driver housing opens, and the gas in the driver housing enters the bottom layer of the housing through the exhaust pipe to carry the heat generated by the charging module on the bottom layer of the housing from the top or side wall of the housing to the outside of the housing, thereby playing a certain role in heat dissipation.

[0020] (3) Select an infrared sensor as a photoelectric sensor to detect the red light emitted by the status indicator. When the infrared sensor does not detect the red light emitted by the status indicator (that is, the electric vehicle is fully charged), the infrared sensor sends the undetected red light signal to the control chip. Then the control chip sends an execution command to the micro air pump to start the pulling mechanism to pull out the charging connector.

[0021] (4) During the detection process, when the photoelectric sensor with a narrow-band green filter collects green light, the photoelectric sensor sends the detected green light signal to the control chip, and the control chip sends an execution command to the micro air pump to start the pull-out mechanism to pull out the charging connector.

[0022] (5) The vibration sensor is used to detect the vibration signal of the shell in real time to determine whether the charging pile has failed and lost power. The vibration of the shell comes from the heat dissipation module of the charging module. When the charging module is connected to the power supply of the charging pile, the cooling fan of the heat dissipation module will vibrate during operation. Therefore, when the vibration sensor can detect the vibration signal, it means that after the charging module is connected to the charging pile, there is power to provide power for the cooling fan of the heat dissipation module. When the charging pile fails to supply power due to a fault, the cooling fan will not work. At this time, there is no vibration signal in the whole device. When the vibration sensor does not detect the vibration signal, the vibration sensor sends the undetected signal to the control chip, and the control chip sends an execution command to the micro air pump to start the pull-out mechanism to pull out the charging connector.

[0023] In summary, this invention can automatically detect the charging status of the charger and the operating status of the charging pile. When the charging pile fails to supply power due to a fault or the charger is fully charged, it can automatically unplug the charging connector from the charging port of the electric vehicle, thus avoiding damage to the battery life of the electric vehicle, and preventing the charger from overheating due to prolonged power supply. If the components age or encounter voltage fluctuations, it may cause problems such as short circuits and spontaneous combustion.

[0024] Other features and advantages of the present invention will be described in detail in the following detailed description section; and all parts not covered in the present invention are the same as or can be implemented using the prior art. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a battery-powered vehicle charging protection device provided in a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of a battery-powered vehicle charging protection device provided in a preferred embodiment of the present invention. Figure 3 This is an assembly diagram of the pull-out mechanism of the housing of the electric vehicle charging protection device provided in a preferred embodiment of the present invention. Figure 4 This is a schematic diagram of the driver of the electric vehicle charging protection device provided in a preferred embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the charger module (charger) of the electric vehicle charging protection device provided in a preferred embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures 1. Housing; 2. Partition; 3. Output wire; 4. Input wire; 5. Charging connector; 6. Pulling mechanism; 601. Moving plate; 602. Driver; 6021. Drive housing; 6022. Drive piston; 6023. Drive rod; 603. Pull rope; 7. Control chip; 8. Wedge block; 9. Status indicator light; 10. Photoelectric sensor; 11. Vibration sensor; 12. Guide rod; 13. Spring No. 1; 14. Miniature air pump; 15. Air outlet pipe; 16. Exhaust pipe; 17. Spring No. 2; 18. Rubber strip; 19. Fixing device. Detailed Implementation

[0027] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0028] like Figure 1-5 As shown, the present invention provides a battery charging protection device, comprising: a housing 1, a partition 2 horizontally fixed inside the housing 1 to divide it into upper and lower layers, a charger module integrated on the bottom layer of the housing 1, an output wire 3 and an input wire 4 respectively connected to the charger module and passing through both ends of the bottom layer of the housing 1, and a charging connector 5 connected to the free end of the output wire 3. The upper layer of the housing 1 is provided with a pull mechanism 6 that can automatically detect when the charging pile is out of power or the electric vehicle is fully charged, and can automatically pull the charging connector 5 out of the charging port on the electric vehicle.

[0029] In the above scheme, the top and side walls of the housing 1 are respectively provided with heat dissipation slots and heat dissipation holes. The charging module includes: an input filtering module, a high-voltage conversion module, an output rectification module, an intelligent control and protection module, and a heat dissipation module; wherein, The input filtering module includes: fuse, common mode inductor, safety capacitor, and NTC thermistor; it is used to filter out power grid spike interference, and at the same time realize overcurrent and surge protection to prevent high voltage surges from damaging subsequent components; The high-voltage conversion module consists of a rectifier bridge, high-voltage filter capacitors, a high-frequency transformer, a switching transistor, and a PWM main control chip; it is used to convert 220V AC power into approximately 310V high-voltage DC power, and then step it down to low-voltage pulse power through a high-frequency transformer. It is the core part of the charger to achieve voltage conversion. The output rectifier module includes a fast recovery rectifier diode and a low-voltage filter capacitor, which converts low-voltage pulsed electricity into stable pure DC or pulsating DC electricity to directly charge the battery. The intelligent control and protection module uses a dedicated MCU control chip as its core, and is equipped with components such as optocouplers, sampling resistors, and operational amplifiers to achieve three-stage charging management of constant current, constant voltage, and trickle charging. It also has multiple protection functions such as overcharge, overcurrent, overheating, and short circuit. The heat dissipation module includes: a cooling fan; and aluminum alloy heat sinks covering the power components. For low-power fanless models, the heat generated during operation is quickly dissipated through the heat conduction of the housing and the internal filling with thermally conductive adhesive to prevent the components from overheating and being damaged.

[0030] The aforementioned charging module is simply a charger with the outer casing removed, which is a known existing technology.

[0031] This technical solution actually integrates the pulling mechanism 6 into the charger to protect the charger body and the battery of the electric vehicle.

[0032] During use, insert the charging connector 5 on the input cable 3 into the charging port on the electric vehicle, and insert the plug on the output cable into the socket on the charging station to connect the charging module for charging. During charging, if a power outage is detected at the charging station or the electric vehicle is fully charged, the pull-out mechanism 6 can pull the charging connector 5 out of the electric vehicle's charging port. This prevents the charging module from remaining connected to the electric vehicle's charging port in the event of a power outage or a fully charged electric vehicle, thus avoiding the following problems: (1) Damage to the battery life of electric vehicles: When the battery enters the "float charging" state, maintaining 100% high voltage for a long time will accelerate the loss of internal electrolyte and the shedding of active materials, resulting in battery swelling, capacity reduction, and reduced range, which may be irreversible in severe cases.

[0033] (2) Increased safety risks: The charger heats up when powered on for a long time. If the components are aging or there are voltage fluctuations, it may cause short circuits or spontaneous combustion. The risk of battery thermal runaway increases under high temperature conditions, and in extreme cases, it may lead to explosion.

[0034] (3) Damaged charger and power consumption: The continuous operation of the charger components accelerates aging and increases the failure rate; although the power consumption of float charging is low, it still causes unnecessary power waste in the long term.

[0035] Additionally, a pull-out mechanism 6 with the same structure can be provided at the other end of the upper layer of the housing 1, which is used to unplug the power plug at the end of the output cable 4 from the socket of the charging pile.

[0036] In a preferred embodiment of the present invention, the pulling mechanism 6 includes: a moving plate 601, a driver 602, and a pull rope 603; wherein, A movable plate 601 is horizontally and movably arranged on the upper layer of the housing 1. Pull ropes 603 are fixedly arranged parallel to each other on both sides of the charging connector 5 of the output wire 3. The other ends of the two pull ropes 603 pass through the upper layer of the housing 1 from the end of the housing 1 and are fixed on the movable plate 601. A driver 602 for driving the movable plate 601 to move is horizontally fixed on the partition 2 near the pull ropes 603.

[0037] In the above scheme, during use, as the driver 602 moves the movable plate 601 away from one end of the pull rope 603, the movable plate 601 pulls the two pull ropes 603 to change them from a slack state to a taut state. Then, as the movable plate 601 continues to move, it pulls the charging connector 3 out of the charging port of the electric vehicle. After the charging connector 3 is pulled out, the driver 602 can drive the movable plate 601 to move in the opposite direction and return to its initial position, achieving automatic reset.

[0038] In addition, the pull rope 603 can be made of flexible material or steel wire rope, etc.

[0039] In a preferred embodiment of the present invention, the actuator 602 includes: a drive housing 6021, a drive piston 6022, and a drive rod 6023; wherein, The drive housing 6021 is horizontally fixed on the partition 2. A drive piston 6022 is horizontally and movably arranged inside the drive housing 6022. A drive rod 6023 is horizontally fixed on the drive piston 6022, which can pass horizontally through the end of the drive housing 6021 and be fixed on the moving plate 601. A first spring 13 is sleeved on the drive rod 6023 inside the drive housing 6021. The two ends of the first spring 13 are respectively fixed on the drive housing 6021 and the drive piston 6022. An air inlet pipe and an air outlet pipe 15 communicating with the interior are respectively fixedly arranged at intervals on the end of the drive housing 6021 near the pull rope 603. A miniature air pump 14 is fixedly arranged on one side of the driver 602. The air outlet end of the miniature air pump 14 is connected to the air inlet pipe. A solenoid valve is arranged on the air outlet pipe 15, and the free end of the air outlet pipe 15 passes vertically through the partition 2 and extends to the bottom layer of the housing 1.

[0040] In the above scheme, before the driver 602 is working, the solenoid valve on the air outlet pipe 15 is closed. Then, the micro air pump 14 is started to draw external gas into the micro air pump 14 through the housing and enter the interior of the driver housing 6021 through the air inlet pipe. This drives the rubber-made driver piston 6022 to move toward the moving plate 601. At the same time, the driver piston 6022 drives the driver rod 6023 to push the moving plate 601 so that the two pull ropes 603 change from a slack state to a taut state. Then, as the moving plate 601 continues to move, it drives the charging connector 3 to be pulled out of the charging port of the electric vehicle. When the charging connector 3 is disconnected, the micro air pump 14 stops operating. Subsequently, the solenoid valve on the air outlet pipe 15 of the drive housing 6021 opens, and the gas inside the drive housing 6021 enters the bottom layer of the housing 1 through the air outlet pipe 15. This dissipates the heat generated by the charging module on the bottom layer of the housing 1 from the top or side wall of the housing 1 to the outside, thus providing some heat dissipation. As the gas inside the drive housing 6021 is gradually discharged, the drive piston 6022 moves in the opposite direction to its initial position under the action of the first spring 13. At the same time, the drive rod 6023 pulls the moving plate 601 back to its initial state.

[0041] In addition, the miniature air pump 14 can be a miniature booster air pump from Foshan Yurui Electronic Technology Co., Ltd., or a miniature 030 air pump with a working DC 3V-3.7V (DC 3V-3.7V) can be used as an air pump.

[0042] In a preferred embodiment of the present invention, the pulling mechanism further includes: a photoelectric sensor 10, a vibration sensor 11, and a control chip 7; wherein, Two wedge-shaped blocks 8 are fixedly and symmetrically at intervals on the top cover of the housing 1. Status indicator lights 9 and photoelectric sensors 10 are fixedly and symmetrically on the inclined surfaces of the two wedge blocks 8. The status indicator lights 9 are electrically connected to the charging module. Vibration sensor 11 and control chip 7 are fixed on the partition 2. The photoelectric sensor 10, vibration sensor 11 and micro air pump 14 are electrically connected to the control chip 7.

[0043] In the above scheme, a status indicator light 9 and a photoelectric sensor 10 are fixedly installed on the opposing surfaces of the two wedge-shaped blocks 8, so that the photoelectric sensor 10 can receive the light emitted by the status indicator light 9. As is well known, the status indicator light 9 on the charging module (charger) emits red light during charging, and changes from red to green when fully charged.

[0044] Therefore, an infrared sensor is selected as the photoelectric sensor 10 to detect the red light emitted by the status indicator 9. When the infrared sensor does not detect the red light emitted by the status indicator 9 (that is, the electric vehicle is fully charged), the infrared sensor 10 sends the undetected red light signal to the control chip 7. The control chip 7 then sends an execution command to the micro air pump 14. At this time, the micro air pump 14 works and injects gas into the drive housing 6021 of the driver 602 through the air intake pipe. It also drives the piston 6022 in the drive housing 6021 to push the drive rod 6023 to drive the moving plate 601 to pull the two pull ropes 603 to pull the charging connector 3 out of the charging port of the electric vehicle.

[0045] In addition to the above solutions, a narrow-band green filter (center wavelength of about 525nm) can be installed in front of the photoelectric sensor 10 to allow only green light to pass through and be converted into an electrical signal.

[0046] During the detection process, when the photoelectric sensor 10 with a narrow-band green filter collects green light, the photoelectric sensor 10 sends the detected green light signal to the control chip 7. The control chip 7 then sends an execution command to the miniature air pump 14. At this time, the miniature air pump 14 operates and injects gas into the drive housing 6021 of the driver 602 through the air intake pipe. It also drives the piston 6022 in the drive housing 6021 to push the drive rod 6023, thereby causing the moving plate 601 to pull the two pull ropes 603 to pull the charging connector 3 out of the charging port of the electric vehicle.

[0047] In addition, the vibration sensor 11 is used to detect the vibration signal of the housing 1 in real time to determine whether the charging pile has malfunctioned and lost power. The vibration of the housing 1 comes from the heat dissipation module of the charging module. When the charging module is connected to the power of the charging pile, the cooling fan of the heat dissipation module will vibrate during operation. Therefore, when the vibration sensor 11 can detect the vibration signal, it means that after the charging module is connected to the charging pile, there is power to provide power for the cooling fan of the heat dissipation module. When the charging pile cannot supply power due to malfunction, the cooling fan will not work. At this time, there is no vibration signal in the entire device. When the vibration sensor 11 does not detect the vibration signal, the vibration sensor 11 sends the undetected signal to the control chip 7. The control chip 7 sends an execution command to the micro air pump 14. At this time, the micro air pump 14 works and injects gas into the drive housing 6021 of the driver 602 through the air intake pipe. It drives the piston 6022 in the drive housing 6021 to push the drive rod 6023 to drive the moving plate 601 to pull the two pull ropes 603 to pull the charging connector 3 out of the charging port of the electric vehicle.

[0048] The upper layer of the housing 1 is also provided with a replaceable battery, which is used to power the micro air pump 14, various sensors and control chip 7.

[0049] In a preferred embodiment of the present invention, an exhaust pipe 16 is horizontally fixedly arranged on the bottom layer of the housing 1 located next to the charger module. The free end of the exhaust pipe 15 is fixed on the exhaust pipe 16 and communicates with its interior. A plurality of nozzles communicating with its interior are uniformly and horizontally fixedly arranged on the exhaust pipe 16 facing the charger module.

[0050] In the above scheme, through several nozzles on the exhaust pipe 16, the gas discharged from the drive housing 6021 through the exhaust pipe 15 can be evenly sprayed onto the charging module, which can accelerate the internal air flow at the bottom of the housing 1, thereby facilitating the rapid discharge of the heat generated by the charging module through the top or side wall of the housing 1, thus playing a certain role.

[0051] Alternatively, a miniature electric cylinder or a miniature servo electric cylinder can be used to replace the actuator 602 and the miniature air pump 14. When the actuator 602 is replaced by a miniature electric cylinder or a miniature servo electric cylinder, the miniature air pump 14, the air inlet pipe, the air outlet pipe 15, and the exhaust pipe 16 can be omitted.

[0052] In a preferred embodiment of the present invention, a partition strip is horizontally fixedly arranged on the partition plate 2, and two guide rods 12 are horizontally fixedly arranged at intervals on the partition strip. The movable plate 601 is provided with guide holes at intervals and horizontally penetrating for the two guide rods 12 to pass through. The movable plate 601 is slidably mounted on the two guide rods 12 through the two guide holes. Each guide rod 12 facing away from the driver 602 is fitted with a second spring 17, and the two ends of each second spring 17 are horizontally fixed to the movable plate 601 and the partition strip, respectively.

[0053] In the above scheme, the two guide rods 12 serve as guides so that the moving plate 601 can move horizontally and linearly at the upper end of the partition 2 under the action of the driver 602.

[0054] When the actuator 602 drives the moving plate 601 away from one end of the charging connector 5 to pull the charging connector 5 out of the charging port of the electric vehicle, it compresses the two second springs 17 on the two guide rods 12 to keep them in a compressed state. When the drive rod 6023 of the actuator 602 resets, the two second springs 17 assist the first spring 13 in driving the drive rod 6023 to push the drive piston 6022 to reset.

[0055] In a preferred embodiment of the present invention, the partition 2 has a plurality of through holes that are uniformly and vertically pierced.

[0056] In the above scheme, the heat generated by the charging module during operation can be dissipated from the top of the housing 1 through the partition 2, or it can be dissipated from the side wall of the housing.

[0057] In a preferred embodiment of the present invention, a plurality of rubber strips 18 are uniformly fixedly disposed on the surface of the charging connector 5.

[0058] In the above solution, when the charging connector 5 is pulled out of the charging port of the electric vehicle, the falling charging connector 5 is prevented from colliding with the electric vehicle, thereby protecting the charging connector 5.

[0059] In a preferred embodiment of the present invention, a plurality of ring-shaped fasteners 19 are fixedly arranged at equal intervals on the output wire 3, and the fasteners 19 located on both sides of the output wire 3 are respectively provided with clearance holes for the two pull ropes 603 to pass through.

[0060] In the above scheme, the fixing device 19 can effectively bring the two pull ropes 603 close to the input cable 3 so that they become entangled and knotted.

[0061] In a preferred embodiment of the present invention, straps are symmetrically fixed on both sides of the housing 1.

[0062] In the above scheme, during the charging process, the casing 1 can be tied to the front of the vehicle or the seat with two straps to prevent the charger (charging protection device) from falling to the ground and being damaged when the charger connector 5 is pulled out of the charging port of the electric vehicle or the power plug of the charger is pulled out of the charging pile socket by the pulling mechanism 6 after the charging is completed.

[0063] In summary, the electric vehicle charging protection device provided by this invention overcomes the problems in the prior art where the charging module remains connected to the charging port of the electric vehicle even when the charging pile malfunctions and the electric vehicle is fully charged. This avoids damage to the battery life of the electric vehicle, overheating of the charger due to prolonged power supply, potential short circuits or spontaneous combustion due to component aging or voltage fluctuations, increased risk of battery thermal runaway under high temperature conditions, and in extreme cases, explosions, damage to the charger, and power consumption.

[0064] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0065] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0066] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A battery-powered vehicle charging protection device, characterized in that, include: The housing (1), the partition (2) horizontally fixed inside the housing (1) to divide it into upper and lower layers, the charger module integrated on the bottom layer of the housing (1), the output wire (3) and the input wire (4) respectively connected to the charger module and passing through the two ends of the bottom layer of the housing (1), and the charging connector (5) connected to the free end of the output wire (3). The upper layer of the housing (1) is provided with a pull mechanism (6) that can automatically detect when the charging pile is out of power or the electric vehicle is fully charged, and can automatically pull the charging connector (5) out of the charging port on the electric vehicle.

2. The electric vehicle charging protection device according to claim 1, characterized in that, The pulling mechanism (6) includes: a moving plate (601), a driver (602), and a pull rope (603); wherein, A movable plate (601) is horizontally and movably provided on the upper layer of the housing (1). Pull ropes (603) are fixedly provided in parallel on both sides of the charging connector (5) of the output wire (3). The other ends of the two pull ropes (603) pass through the upper layer of the housing (1) from the end of the housing (1) and are fixed on the movable plate (601). A driver (602) for driving the movable plate (601) to move is horizontally fixed on the partition (2) near the pull ropes (603).

3. The electric vehicle charging protection device according to claim 2, characterized in that, The actuator (602) includes: a drive housing (6021), a drive piston (6022), and a drive rod (6023); wherein, The drive housing (6021) is horizontally fixed on the partition plate (2), and a drive piston (6022) is horizontally and movably arranged inside it. A drive rod (6023) is horizontally fixed on the drive piston (6022) and can pass horizontally through the end of the drive housing (6021) and be fixed on the moving plate (601). A first spring (13) is sleeved on the drive rod (6023) located inside the drive housing (6021). The two ends of the first spring (13) are respectively fixed on the drive housing. On the drive housing (6021) and drive piston (6022), at the end of the drive housing (6021) near the pull rope (603), an air inlet pipe and an air outlet pipe (15) communicating with the interior are respectively spaced apart and fixedly provided. A miniature air pump (14) is fixedly provided on one side of the drive unit (602). The air outlet end of the miniature air pump (14) is connected to the air inlet pipe. A solenoid valve is provided on the air outlet pipe (15), and the free end of the air outlet pipe (15) passes vertically through the partition (2) and extends to the bottom layer of the housing (1).

4. The electric vehicle charging protection device according to claim 3, characterized in that, The pulling mechanism further includes: a photoelectric sensor (10), a vibration sensor (11), and a control chip (7); wherein, Two wedge-shaped blocks (8) are fixedly and symmetrically at intervals on the top cover of the housing (1). A status indicator (9) and a photoelectric sensor (10) are fixedly and used together on the inclined surfaces of the two wedge-shaped blocks (8). The status indicator (9) is electrically connected to the charging module. The vibration sensor (11) and the control chip (7) are fixed on the partition (2). The photoelectric sensor (10), the vibration sensor (11) and the micro air pump (14) are electrically connected to the control chip (7).

5. The electric vehicle charging protection device according to claim 4, characterized in that, An exhaust pipe (16) is horizontally fixed on the bottom layer of the housing (1) located next to the charger module. The free end of the exhaust pipe (15) is fixed on the exhaust pipe (16) and communicates with its interior. Several nozzles communicating with its interior are evenly and horizontally fixed on the exhaust pipe (16) facing the charger module.

6. The electric vehicle charging protection device according to claim 5, characterized in that, A partition strip is horizontally fixed on the partition plate (2). Two guide rods (12) are horizontally fixed on the partition strip at intervals. The moving plate (601) has guide holes at intervals and horizontally through which the two guide rods (12) pass. The moving plate (601) is slidably mounted on the two guide rods (12) through the two guide holes. Each guide rod (12) facing away from the driver (602) is fitted with a second spring (17). The two ends of each second spring (17) are horizontally fixed on the moving plate (601) and the partition strip, respectively.

7. The electric vehicle charging protection device according to claim 6, characterized in that, The partition (2) has several through holes that are evenly and vertically pierced.

8. The electric vehicle charging protection device according to claim 1, characterized in that, Several rubber strips (18) are uniformly fixed on the surface of the charging connector (5).

9. The electric vehicle charging protection device according to claim 1, characterized in that, The output wire (3) is fixedly provided with several ring-shaped fasteners (19) at equal intervals, and the fasteners (19) located on both sides of the output wire (3) are respectively provided with clearance holes for the two pull ropes (603) to pass through.

10. The electric vehicle charging protection device according to claim 1, characterized in that, The shell (1) is symmetrically fixed with straps on both sides.

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