High-power charging gun with air-cooling heat dissipation structure

Abstract

The invention relates to the field of charging guns, in particular to a high-power charging gun with an air cooling heat dissipation structure, which comprises a gun shell and a gun head, and is characterized in that the gun head is mounted on one side of the gun shell, and a cable is arranged on one side of the gun shell and is connected with a charging pile. The charging gun effectively solves the problems that an existing charging gun is high in pin temperature rise, low in charging efficiency and high in high-power cost, high-efficiency pin heat conduction is achieved through the pouring sealant, the ceramic sleeve and the cooling fin sleeve, natural air cooling circulation is formed through gun shell cooling air holes, the pin working temperature is remarkably reduced, a conventional cable of the same specification can bear larger current, and the service life of the charging gun is prolonged. The cost is reduced; pure physical air cooling is free of liquid cooling aging risks, and maintenance is convenient. Meanwhile, through double sealing and a multi-stage filtering structure, water and dust are prevented, a heat dissipation channel is prevented from being blocked, the ceramic sleeve fundamentally avoids the risks of electric leakage and poor insulation, the equipment reliability is greatly improved, the device is adaptive to the outdoor complex environment, the national standard requirement is met, and the application range is wide.

Description

Technical Field

[0001] This invention relates to the field of charging guns, and more specifically to a high-power charging gun with a wind-cooled heat dissipation structure. Background Technology

[0002] A new energy vehicle charging gun is a special connection device used to connect an electric vehicle to a power source and replenish the power battery. One end connects to the power grid, and the other end is inserted into the vehicle. It is responsible for safely delivering electrical energy to the vehicle's battery.

[0003] In patent application CN212708988U, published on March 16, 2021, entitled "A Motor Lock and Charging Gun for a Charging Gun," this invention discloses a motor lock and charging gun for a charging gun. The lock includes a housing, a microswitch whose input end is connected to a circuit unit inside the charging gun, a motor whose input end is connected to the output end of the microswitch, and a rotating shaft fixedly connected to the output shaft of the motor. The housing has a locking groove, and the rotating shaft has a recess. The motor lock has two working states. In the first working state, the microswitch is open, and the recess corresponds to the locking groove. In the second working state, the microswitch is closed, the recess and locking groove are misaligned, and the locking groove is blocked by the rotating shaft. This motor lock and charging gun for a charging gun ensures that the charging gun is stably connected to the car charging interface during charging, effectively preventing the charging gun from detaching from the car charging interface during charging and thus preventing damage to the charging gun or car battery, as well as other safety hazards.

[0004] In existing charging guns, including those mentioned in the patents or prior art, the high temperature of the pins during operation firstly limits the charging current, thus reducing charging efficiency. Increasing the charging current requires larger pins and higher cable specifications, which increases costs.

[0005] Therefore, it is necessary to invent a high-power charging gun with a wind-cooled heat dissipation structure to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a high-power charging gun with a wind-cooled heat dissipation structure. By using an insulated, heat-conducting, wind-cooled structure and a matching protective sealing design, it solves the problems of high temperature rise of the charging gun pins, low charging efficiency, high cost of high power, and insufficient insulation and protection performance.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a high-power charging gun with a wind-cooled heat dissipation structure, comprising a gun shell and a gun head, characterized in that: the gun head is installed on one side of the gun shell, and a cable is provided on one side of the gun shell, and the cable is connected to a charging pile; The heat dissipation assembly installed inside the gun head and gun housing includes a pin, which is fixedly connected to a cable terminal and is located inside the gun head and gun housing. A ceramic sleeve is fitted onto the pin, and potting compound is filled between the pin and the ceramic sleeve. A heat sink sleeve is fitted onto the ceramic sleeve. The protective components located on the outside of the gun casing include heat dissipation vents, which are symmetrically opened on the upper and lower sides of the inner wall of the gun casing, and each set of heat dissipation vents is located on the side and lower side of the heat sink sleeve.

[0008] In a preferred embodiment of the present invention, a pin fixing member is sleeved and fixed on the pin, and the pin fixing member is fixedly installed inside the gun head.

[0009] In a preferred embodiment of the present invention, a heat sink upper pressure plate is sleeved on the pin, and the heat sink upper pressure plate is fitted and snapped into place with the heat sink sleeve.

[0010] In a preferred embodiment of the present invention, an upper waterproof ring is fitted between the upper pressure plate of the heat sink and the heat sink sleeve, and the upper waterproof ring is fitted and sealed with the gap between the ceramic sleeve and the heat sink sleeve, and the upper waterproof ring is sleeved with the pin.

[0011] In a preferred embodiment of the present invention, the side of the heat sink sleeve away from the upper pressure plate of the heat sink is fitted and snapped with the lower pressure plate of the heat sink, and the pin is connected through the lower pressure plate of the heat sink.

[0012] As a preferred embodiment of the present invention, a lower waterproof ring is fitted between the heat sink lower pressure plate and the heat sink sleeve, and the lower waterproof ring is fitted and sealed with the gap between the ceramic sleeve and the heat sink sleeve, and the lower waterproof ring is sleeved with the pin.

[0013] As a preferred embodiment of the present invention, a plurality of filter frames are attached to the outer side of the gun shell, and a plurality of inclined through grooves are sequentially opened on one side of the filter frames, with the inclined direction of the inclined through grooves facing downwards towards the gun shell.

[0014] As a preferred embodiment of the present invention, multiple sets of filter plates are sequentially installed in the filter frame, and the filter plates and the inclined through slots are staggered.

[0015] As a preferred embodiment of the present invention, the bottom of the filter frame has multiple sets of through holes arranged in an array, and each set of filter frames covers the corresponding heat dissipation holes.

[0016] As a preferred embodiment of the present invention, each group of filter frames is sequentially connected to a rubber docking frame on one side, and the rubber docking frame is inserted into the corresponding heat dissipation hole. Each group of heat dissipation holes has a sealing groove on its inner wall, and each group of rubber docking frames is fitted with a sealing ring, and the sealing ring fits into the corresponding sealing groove.

[0017] Compared with the prior art, the technical effects and advantages provided by the present invention in the above technical solution are as follows: 1. This invention effectively solves the core pain points of existing charging guns, such as high pin operating temperature, limited charging current, and low charging efficiency. It achieves efficient heat conduction through the potting compound filling the space between the pin and the ceramic sleeve. Combined with the heat sink sleeve on the outside of the ceramic sleeve, it rapidly disperses and removes heat from the heat source. Furthermore, relying on the natural air cooling circulation channel formed by the heat dissipation vents in the gun shell, air continuously carries away the heat from the heat sink sleeve, significantly reducing the pin operating temperature. It can carry a larger charging current using conventional cables of the same specifications without increasing the pin size or customizing special cables, greatly reducing production costs while effectively improving charging efficiency. The heat dissipation structure adopts a pure physical air cooling principle, requiring no additional cooling medium, eliminating the risk of aging and failure of liquid cooling pipes, making maintenance convenient, and ensuring stable heat dissipation performance over long-term use. 2. This invention, while ensuring efficient air-cooling, constructs a comprehensive protection and safety system. The double-sealed structure formed by upper and lower waterproof rings effectively seals gaps in the heat dissipation structure, blocking the infiltration of moisture and impurities. The downward-sloping channels of the filter frame and the staggered multi-stage filter plates ensure ventilation while blocking rainwater, large particles, and filtering dust particles, preventing blockage of the heat dissipation channels and ensuring long-term stable air-cooling performance. Simultaneously, the ceramic sleeve provides electrical isolation between the pins and the heat sink sleeve, fundamentally preventing leakage and poor insulation withstand voltage caused by a charged heat sink. This significantly improves the electrical safety and structural reliability of the charging gun, making it suitable for complex outdoor working environments, compatible with conventional charging piles, compliant with national standards, and widely applicable. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the gun head structure of the present invention; Figure 3 This is a schematic diagram of the gun casing planing structure of the present invention; Figure 4 This is a schematic diagram of the overall disassembled structure of the present invention; Figure 5 This is a schematic diagram of the heat dissipation component assembly structure of the present invention; Figure 6This is a schematic diagram of the pin cutting structure of the present invention; Figure 7 This is a schematic diagram of a partial planed structure of the heat sink sleeve of the present invention; Figure 8 This is a schematic diagram of a partial planarized structure of the heat dissipation component of the present invention; Figure 9 This is a schematic diagram of the connection structure between the gun shell and the filter frame of the present invention; Figure 10 This is a schematic diagram of the cut structure of the filter frame of the present invention.

[0020] Explanation of reference numerals in the attached drawings: 001, gun casing; 101, gun head; 102, cable; 002, heat dissipation assembly; 201, pin; 202, pin fixing component; 203, upper pressure plate of heat dissipation fin; 204, heat dissipation fin sleeve; 205, ceramic sleeve; 206, upper waterproof ring; 207, lower waterproof ring; 208, lower pressure plate of heat dissipation fin; 003, protective assembly; 301, heat dissipation vent; 302, filter frame; 303, inclined through groove; 304, filter perforated plate; 305, through hole; 306, rubber mating frame; 307, sealing ring; 308, sealing groove. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] This invention provides, for example Figure 1-10 The high-power charging gun with a wind-cooled heat dissipation structure shown includes a gun shell 001 and a gun head 101. The gun head 101 is installed on one side of the gun shell 001, and a cable 102 is provided on one side of the gun shell 001, and the cable 102 is connected to the charging pile. The assembly of the gun head 101 and the gun housing 001 provides a mounting carrier for the components inside the entire charging gun, and at the same time, the electrical connection with the charging pile is realized through the cable 102, providing a basic carrier for the transmission of high-power current.

[0023] The heat dissipation assembly 002 disposed in the gun head 101 and the gun housing 001 includes a pin 201. The pin 201 is fixedly connected to the terminal of the cable 102 and is located inside the gun head 101 and the gun housing 001. A ceramic sleeve 205 is sleeved on the pin 201 and potting compound is filled between the pin 201 and the ceramic sleeve 205. A heat sink sleeve 204 is sleeved on the ceramic sleeve 205. The ceramic sleeve 205 isolates the pin 201 from the heat sink sleeve 204, preventing leakage and poor insulation and withstand voltage caused by the heat sink being energized. The potting compound ensures full contact between the pin 201 and the ceramic sleeve 205, achieving both efficient heat conduction and electrical insulation. The heat sink sleeve 204 absorbs the heat generated by the pin during operation, which can significantly reduce the pin's operating temperature, enabling the cable of the same specification to carry a larger current, improving charging efficiency and reducing production costs.

[0024] The protective component 003 located on the outside of the gun housing 001 includes heat dissipation vents 301. The heat dissipation vents 301 are symmetrically opened on the upper and lower sides of the inner wall of the gun housing 001, and each set of heat dissipation vents 301 is located on the side and lower side of the heat dissipation sleeve 204.

[0025] By allowing cold air to enter the gun body cavity and flow through the surface of the heat sink sleeve 204, heat is carried away, forming a complete air-cooling cycle to ensure that the product will not overheat or overpressure during operation.

[0026] As a preferred embodiment of the present invention, a pin fixing member 202 is sleeved and fixed on the pin 201, and the pin fixing member 202 is fixedly installed inside the gun head 101.

[0027] The pin retainer 202 can securely limit the pin 201 within the gun head 101, ensuring the stability of the pin 201 during subsequent insertion.

[0028] As a preferred embodiment of the present invention, a heat sink upper pressure plate 203 is sleeved on the pin 201, and the heat sink upper pressure plate 203 is fitted and snapped into the heat sink sleeve 204.

[0029] The heat sink sleeve 204 can be fixed by the pressure plate 203 on the heat sink, ensuring efficient heat conduction from the ceramic sleeve 205 to the heat sink sleeve 204.

[0030] As a preferred embodiment of the present invention, an upper waterproof ring 206 is attached between the upper pressure plate 203 of the heat sink and the heat sink sleeve 204, and the upper waterproof ring 206 is fitted and sealed to the gap between the ceramic sleeve 205 and the heat sink sleeve 204, and the upper waterproof ring 206 is sleeved with the pin 201.

[0031] The upper gap of the heat dissipation structure is sealed by the upper waterproof ring 206 to achieve waterproof sealing and prevent water vapor and impurities from entering the gun body and affecting the insulation performance and heat dissipation effect.

[0032] As a preferred embodiment of the present invention, the heat sink sleeve 204 is fitted and snapped with the heat sink lower pressure plate 208 on the side away from the heat sink upper pressure plate 203, and the pin 201 is connected through the heat sink lower pressure plate 208.

[0033] The heat sink sleeve 204 is fixed by the bidirectional cooperation of the lower pressure plate 208 and the upper pressure plate 203, ensuring its stable installation and preventing the heat dissipation structure from failing under vibration and impact conditions.

[0034] As a preferred embodiment of the present invention, a lower waterproof ring 207 is fitted between the heat sink lower pressure plate 208 and the heat sink sleeve 204, and the gap between the lower waterproof ring 207 and the ceramic sleeve 205 and the heat sink sleeve 204 is fitted and sealed, and the lower waterproof ring 207 is sleeved with the pin 201.

[0035] The lower waterproof ring 207 and the upper waterproof ring 206 form a double sealing structure, sealing the gap at the lower end of the heat dissipation structure, further improving waterproof and dustproof performance, and making it suitable for complex outdoor working environments.

[0036] As a preferred embodiment of the present invention, a plurality of filter frames 302 are attached to the outer side of the gun housing 001. A plurality of inclined through grooves 303 are sequentially opened on one side of the filter frame 302, and the inclined direction of the inclined through grooves 303 is towards the lower part of the gun housing 001.

[0037] By tilting the through-slot 303, it ensures ventilation while preventing rainwater and foreign objects from directly entering the gun body.

[0038] As a preferred embodiment of the present invention, a plurality of filter perforated plates 304 are sequentially installed in the filter frame 302, and the filter perforated plates 304 and the inclined through grooves 303 are staggered.

[0039] The filter plate 304 can filter dust and particulate matter from the air entering the gun body, preventing impurities from adhering and clogging the heat dissipation channels, ensuring long-term stable air-cooling performance, and reducing the difficulty of equipment maintenance.

[0040] As a preferred embodiment of the present invention, the bottom of the filter frame 302 is provided with multiple sets of through holes 305 arranged in an array, and each set of filter frames 302 covers the corresponding heat dissipation holes 301.

[0041] By covering the filter frame 302, basic protection can be provided for the heat dissipation vents 301, while ensuring smooth airflow and preventing the filter frame from becoming a ventilation obstruction.

[0042] As a preferred embodiment of the present invention, each group of filter frames 302 is sequentially connected to a rubber docking frame 306 on one side, and the rubber docking frame 306 is inserted into the corresponding heat dissipation hole 301. Each group of heat dissipation holes 301 has a sealing groove 308 on its inner wall, and each group of rubber docking frames 306 is fitted with a sealing ring 307, and the sealing ring 307 fits into the corresponding sealing groove 308.

[0043] The rubber mating frame 306 enables precise docking and quick assembly / disassembly of the filter frame 302 and the heat dissipation vent 301. The sealing ring 307 and the sealing groove 308 work together to enhance the sealing performance at the connection, preventing moisture and impurities from seeping in, while also improving the connection stability of the filter frame.

[0044] Furthermore, in the above structure, like Figure 1-10 As shown, when the charging gun connects to the vehicle's charging interface via the gun head 101 and the cable 102 connects to the charging pile to start high-power charging, the current is transmitted to the pin 201 through the terminal of the cable 102. The pin 201 generates a large amount of heat when the high current passes through it, and its operating temperature rises rapidly. At this time, the potting compound filled between the pin 201 and the ceramic sleeve 205 ensures that the heating surface of the pin 201 is fully in contact with the ceramic sleeve 205, efficiently and evenly conducting the heat generated by the pin 201 to the ceramic sleeve 205. The ceramic sleeve 205 isolates the pin 201 from the outer heat sink sleeve 204, preventing leakage and poor insulation withstand voltage caused by the heat sink being charged. At the same time, it uses its excellent thermal conductivity to quickly transfer the heat to the heat sink sleeve 204 fitted on its outside, completing the heat dissipation and dispersion of the heat source.

[0045] As the temperature of the heat sink sleeve 204 continues to rise with the operation of the pin 201, relying on the non-enclosed cavity structure of the gun housing 001, the air-cooling heat dissipation cycle is automatically started using the natural convection principle of hot air rising and cold air sinking: outside cold air enters the internal cavity of the gun housing 001 through the heat dissipation vents 301 on the bottom and sides of the gun housing 001, and the low-temperature air flows directly over the high-temperature outer surface of the heat sink sleeve 204 to complete heat exchange with the heat sink sleeve 204 and absorb the heat carried by it from the pin 201; after completing the heat exchange, the temperature of the hot air increases and the density decreases, and it naturally flows upward, and finally is discharged to the outside environment through the heat dissipation vents 301 on the top of the gun housing 001. Through this continuous air circulation channel, air is used as the cooling medium to continuously remove the heat conducted from the pin 201 to the heat sink sleeve 204, keeping the operating temperature of the pin 201 within a safe range. This ensures that the product will not experience overvoltage or overtemperature issues, while also preventing the charging current from being limited due to excessive temperature. This allows the product to carry a larger charging current under the same cable specifications, improving charging efficiency and reducing cable production costs.

[0046] During the cold air intake stage of the air-cooled circulation, outside air first comes into contact with the filter frame 302 covering the outside of the heat dissipation vent 301. It first passes through the inclined groove 303 on the downward-sloping side wall of the filter frame 302. The inclined groove structure can directly block rainwater and large particles from entering with the air, preventing liquid water from directly entering the gun body. After the initial water blocking, the air enters the interior of the filter frame 302 and flows through multiple sets of filter perforated plates 304 that are staggered with the inclined groove 303. The filter perforated plates 304 perform multi-stage interception and filtration of dust and fine particles in the air, preventing impurities from entering the gun body and adhering to the surface of the heat sink sleeve 204 to block the heat dissipation channel, thus ensuring the long-term stability of the air-cooled heat dissipation effect. The filtered and purified air passes through the through holes 305 arrayed at the bottom of the filter frame 302 to ensure smooth flow, and then through the rubber docking frame 306 that is inserted into the heat dissipation vent 301, and finally enters the internal cavity of the gun housing 001 through the heat dissipation vent 301, completing the purification and input of cold air.

[0047] Throughout the entire charging and heat dissipation process, the pin retainer 202 consistently and securely limits the pin 201, preventing it from loosening due to insertion and removal vibrations, increasing contact resistance, and causing additional heat generation. The upper pressure plate 203 and lower pressure plate 208 of the heat sink press the heat sink sleeve 204 from both ends, eliminating assembly gaps and ensuring heat conduction efficiency while preventing vibration and impact from causing displacement and failure of the heat dissipation structure. The upper waterproof ring 206 and lower waterproof ring 207 provide double sealing for the gaps at both ends of the heat dissipation structure. Combined with the sealing ring 307 on the rubber mating frame 306 and the sealing groove 308 inside the heat dissipation vent 301, this comprehensively blocks the infiltration path of water vapor and impurities, ensuring the insulation performance and structural reliability of the gun body. There is no risk of aging of liquid cooling pipes; heat dissipation is achieved solely through physical air cooling, requiring no additional cooling medium. Maintenance is simple, and it is compatible with conventional charging piles, meeting national standard usage requirements.

[0048] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-power charging gun with a wind-cooled heat dissipation structure, comprising a gun shell (001) and a gun head (101), characterized in that: The gun head (101) is installed on one side of the gun housing (001), and a cable (102) is provided on one side of the gun housing (001), and the cable (102) is connected to the charging pile; The heat dissipation assembly (002) disposed in the gun head (101) and the gun shell (001) includes a pin (201), the inside of which is fixedly connected to the terminal of the cable (102), and the pin (201) is located inside the gun head (101) and the gun shell (001). A ceramic sleeve (205) is sleeved on the pin (201), and potting compound is filled between the pin (201) and the ceramic sleeve (205). A heat sink sleeve (204) is sleeved on the ceramic sleeve (205). The protective assembly (003) located on the outside of the gun housing (001) includes heat dissipation vents (301). The heat dissipation vents (301) are symmetrically opened above and below the inner wall of the gun housing (001), and each set of heat dissipation vents (301) is located on the side and below the heat dissipation fin sleeve (204).

2. A high-power charging gun with a wind-cooled heat dissipation structure according to claim 1, characterized in that: The pin (201) is fitted with a pin fixing member (202), and the pin fixing member (202) is fixedly installed inside the gun head (101).

3. A high-power charging gun with a wind-cooled heat dissipation structure according to claim 2, characterized in that: The pin (201) is fitted with a heat sink upper pressure plate (203), and the heat sink upper pressure plate (203) is in close contact with the heat sink sleeve (204).

4. A high-power charging gun with a wind-cooled heat dissipation structure according to claim 3, characterized in that: The upper pressure plate (203) of the heat sink and the heat sink sleeve (204) are connected by an upper waterproof ring (206), and the gap between the upper waterproof ring (206) and the ceramic sleeve (205) and the heat sink sleeve (204) is sealed. The upper waterproof ring (206) is also connected to the pin (201).

5. A high-power charging gun with a wind-cooled heat dissipation structure according to claim 4, characterized in that: The heat sink sleeve (204) is attached to the heat sink lower pressure plate (208) on the side away from the heat sink upper pressure plate (203), and the pin (201) is connected through the heat sink lower pressure plate (208).

6. A high-power charging gun with a wind-cooled heat dissipation structure according to claim 5, characterized in that: The lower pressure plate (208) of the heat sink and the heat sink sleeve (204) are fitted together with a lower waterproof ring (207), and the gap between the lower waterproof ring (207) and the ceramic sleeve (205) and the heat sink sleeve (204) is sealed. The lower waterproof ring (207) is also fitted with the pin (201).

7. A high-power charging gun with a wind-cooled heat dissipation structure according to claim 1, characterized in that: Multiple sets of filter frames (302) are attached to the outside of the gun shell (001). Multiple sets of inclined through grooves (303) are sequentially opened on one side of the filter frame (302), and the inclined direction of the inclined through grooves (303) is towards the bottom of the gun shell (001).

8. A high-power charging gun with a wind-cooled heat dissipation structure according to claim 7, characterized in that: Multiple sets of filter plates (304) are installed sequentially inside the filter frame (302), and the filter plates (304) and the inclined through slots (303) are staggered.

9. A high-power charging gun with a wind-cooled heat dissipation structure according to claim 8, characterized in that: The bottom of the filter frame (302) has multiple sets of through holes (305) arranged in an array, and each set of filter frames (302) covers the corresponding heat dissipation holes (301).

10. A high-power charging gun with a wind-cooled heat dissipation structure according to claim 9, characterized in that: Each group of filter frames (302) has a rubber docking frame (306) connected to one side in sequence, and the rubber docking frame (306) is inserted into the corresponding heat dissipation hole (301). Each group of heat dissipation holes (301) has a sealing groove (308) on its inner wall, and each group of rubber docking frames (306) has a sealing ring (307) fitted and fixed on it, and the sealing ring (307) fits into the corresponding sealing groove (308).

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