High-power direct-current charging gun

Abstract

The invention relates to the technical field of charging guns, in particular to a high-power direct-current charging gun which comprises a high-voltage cable, a heat dissipation assembly, a shell and a pressurization assembly, and the top of the shell is fixedly provided with a grab handle; a barrel is fixedly mounted on the right side of the shell, and a plug is fixedly mounted on the right side of the barrel; and a high-voltage cable is fixedly mounted on the left side of the shell. According to the charging gun, the diversion pipe and the heat conduction cylinder are filled with the heat conduction agent, paraffin is changed from a solid phase to a liquid phase to absorb heat after being heated according to the phase change principle of the paraffin in the heat conduction agent, and the charging gun has excellent flame retardant property, so that the heat conduction agent absorbs a large amount of heat from the interior of the charging gun; the liquid heat conduction agent is driven by heat to circularly flow in the flow guide pipe and the heat conduction cylinder, so that heat dissipation of the charging gun is promoted, and in a conventional state, the solid heat conduction agent is stable in property and free of liquid leakage, so that the safety of the charging gun after frequent use is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of charging guns, and in particular to a high-power direct current charging gun. Background Art

[0002] With the popularity of electric vehicles, high-power DC charging guns have become key equipment for charging new energy vehicles. However, during high-current fast charging, the charging gun will generate a lot of heat, which poses a severe test to its performance and life. Although the existing heat dissipation technology is widely used and low-cost, its heat dissipation efficiency is limited and it is difficult to meet the heat dissipation requirements of future high-power charging modules. Therefore, we propose a high-power DC charging gun.

[0003] The prior art also has the following defects during use:

[0004] 1. The high-power DC charging gun in the prior art adopts liquid cooling to dissipate heat. During the heat dissipation process, the heat is transferred by the flow of liquid to dissipate heat for the charging gun. The heat-conducting liquid used in liquid cooling is also in liquid state under normal conditions. The charging gun needs to be bent frequently during use, so it is easy to leak. This not only affects the heat dissipation effect of the charging gun, but also easily causes leakage, affecting the safety of the charging gun working under high voltage.

[0005] 2. In the heat dissipation process of the high-power DC charging gun in the prior art, the flow speed of the medium used for heat dissipation is limited, which will lead to less than ideal heat dissipation efficiency. When the ambient temperature is at a high temperature, the temperature of the charging gun will rise sharply when the high-voltage current is passed through the charging gun. In order to ensure the safety of the charging gun, the traditional charging gun will choose to reduce the current output power to alleviate the heat dissipation, which will affect the current transmission efficiency of the charging gun.

[0006] In view of this, we propose a high-power DC charging gun to solve the existing problems. Summary of the invention

[0007] The purpose of the present invention is to provide a high-power DC charging gun to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solution: a high-power DC charging gun, comprising a high-voltage cable, a heat dissipation component, a housing and a booster component, wherein a handle is fixedly installed on the top of the housing;

[0009] A cylinder is fixedly installed on the right side of the shell, and a plug-in head is fixedly installed on the right side of the cylinder;

[0010] A high-voltage cable is fixedly installed on the left side of the housing;

[0011] A heat dissipation component is fixedly installed at the bottom of the shell, and the heat dissipation component includes a mounting box, and the front and back of the mounting box are both provided with heat dissipation holes, and the bottom of the mounting box is provided with a plurality of air inlet holes, and the bottom of the mounting box is provided with two inclined surfaces, and a flow guide tube is fixedly installed inside the mounting box, and the two ends of the flow guide tube extend out of the mounting box and are provided with heat-conducting cylinders, and the inner side of the heat-conducting cylinder is fixedly installed with a mounting cylinder, and the mounting cylinder is respectively fixedly connected to the high-voltage cable and the inner wall of the shell, and the interior of the heat-conducting cylinder and the flow guide tube is filled with a heat-conducting agent, and the filling amount of the heat-conducting agent accounts for 80% of the total volume of the heat-conducting cylinder and the flow guide tube, and the heat-conducting agent includes expanded graphite and paraffin, and the ratio of expanded graphite to paraffin is 1:11.5;

[0012] A plurality of groups of boosting components are fixedly installed on the front side of the guide pipe.

[0013] Preferably, the boost assembly includes a boost cylinder, a boost pipe is fixedly installed at one end of the boost cylinder, and the boost pipe and the guide pipe are installed in parallel relative to each other, an inlet pipe is fixedly installed on the bottom of the boost pipe close to the side of the boost cylinder, and a junction pipe is fixedly installed on the bottom of the boost pipe away from the inlet pipe, an angle of 45 degrees is set between the inlet pipe and the junction pipe and the guide pipe, a spiral coil is fixedly installed on the inside of the boost cylinder away from the boost pipe, and a permanent magnet is movably installed inside the boost cylinder, a sealing sleeve is fixedly installed on the outside of the permanent magnet, and the permanent magnet fits against the inner wall of the boost cylinder.

[0014] Preferably, a heat dissipation fan is fixedly installed on one side of the interior of the installation box, and the heat dissipation fan is aligned with the heat dissipation port inside the installation box.

[0015] Preferably, the heat-conducting tube is a hollow cylindrical structure, and a heat-conducting cavity is provided in the heat-conducting tube, and the heat-conducting cavity is communicated with the interior of the flow-conducting tube.

[0016] Preferably, a buckle is installed on the top of the cylinder through a pin, and anti-slip grooves are provided on one side of the top of the buckle.

[0017] Preferably, a spring is fixedly installed on the left side of the bottom of the buckle, and the spring is fixedly connected to the top of the cylinder.

[0018] Preferably, the high-voltage cable passes through the shell and the cylinder, and the high-voltage cable is electrically connected to the plug head.

[0019] Preferably, the high-voltage cable comprises a battery core and an insulating sleeve, the battery core is electrically connected to the plug head, and the insulating sleeve is fixedly connected to the shell and the mounting tube.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention fills the flow tube and the heat-conducting cylinder with a heat-conducting agent. Through the phase change principle of paraffin in the heat-conducting agent, the paraffin changes from a solid state to a liquid state after being heated and begins to absorb heat. The paraffin has excellent flame retardant properties, so that the heat-conducting agent absorbs a large amount of heat from the inside of the charging gun, and relies on the heat to drive the liquid heat-conducting agent to circulate in the flow tube and the heat-conducting cylinder, thereby promoting the heat dissipation of the charging gun. In normal conditions, the solid heat-conducting agent has stable properties and does not leak, thereby ensuring the safety of the charging gun after frequent use.

[0022] 2. The present invention installs a booster assembly on one side of the flow guide tube, and frequently transmits energy to the heat conductor in the flow guide tube through the booster assembly, thereby utilizing pulse energy to promote the rapid flow of the heat conductor inside the flow guide tube, thereby facilitating the improvement of the overall heat dissipation efficiency of the device, so that the charging gun can maintain a relatively high output power when working in a high temperature and high pressure environment, thereby ensuring the transmission efficiency of the charging gun for current. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a first overall three-dimensional structure of the present invention;

[0024] Figure 2 It is a second overall three-dimensional schematic diagram of the present invention;

[0025] Figure 3 It is a front structural schematic diagram of the present invention;

[0026] Figure 4 It is a schematic diagram of a first partial three-dimensional structure of the present invention;

[0027] Figure 5 It is a schematic diagram of a second partial three-dimensional structure of the present invention;

[0028] Figure 6 It is a partial front cross-sectional structural schematic diagram of the present invention;

[0029] Figure 7 It is a schematic diagram of a first partial three-dimensional structure of a booster assembly of the present invention;

[0030] Figure 8 It is a schematic diagram of a second partial three-dimensional structure of the boosting assembly of the present invention;

[0031] Fig. 9 It is a schematic diagram of the front cross-sectional structure of the booster assembly of the present invention.

[0032] In the figure: 1. high-voltage cable; 2. heat dissipation component; 201. installation cylinder; 202. guide tube; 203. heat dissipation fan; 204. installation box; 205. heat-conducting cylinder; 3. cylinder body; 301. buckle; 302. plug-in head; 4. shell; 401. handle; 5. booster component; 501. inlet pipe; 502. conduit; 503. booster pipe; 504. booster cylinder; 505. permanent magnet; 506. spiral coil. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] like Figure 1 - Fig. 9 As shown, a high-power DC charging gun proposed in the present invention includes a high-voltage cable 1, a heat dissipation component 2, a shell 4 and a boost component 5. A handle 401 is fixedly installed on the top of the shell 4. The shell 4 is used to provide an installation position for surrounding components and provide protection for the connection position between the cylinder 3 and the high-voltage cable 1 to ensure the safety and stability of the device during current transmission. The handle 401 provides a hand-held position for the device, so as to facilitate holding and plugging the device;

[0035] The right side of the housing 4 is fixedly mounted with a barrel 3, and the right side of the barrel 3 is fixedly mounted with a plug head 302. The barrel 3 can provide a location for installing the plug head 302 and the high-voltage cable 1, and protect the connection position between the plug head 302 and the high-voltage cable 1, thereby preventing leakage during current transmission, thereby ensuring the safety of the device;

[0036] A high-voltage cable 1 is fixedly installed on the left side of the housing 4. The high-voltage cable 1 can be connected to an external power source to transmit current, so that after the plug 302 is connected to the charging port of the new energy vehicle to form a path, the current is transmitted from the charging pile to the internal circuit of the new energy vehicle;

[0037] The bottom of the shell 4 is fixedly installed with a heat dissipation component 2, and the heat dissipation component 2 includes a mounting box 204, and the front and back of the mounting box 204 are provided with heat dissipation holes, and the bottom of the mounting box 204 is provided with a plurality of air inlet holes, and the bottom of the mounting box 204 is provided with two inclined surfaces, and the interior of the mounting box 204 is fixedly installed with a guide tube 202, and the two ends of the guide tube 202 extend out of the mounting box 204 and are provided with a heat conduction tube 205, and the inner side of the heat conduction tube 205 is fixedly installed with a mounting tube 201, and the mounting tube 201 is respectively fixedly connected to the high-voltage cable 1 and the inner wall of the shell 4, and the heat conduction tube 202 is fixedly connected to the inner wall of the shell 4. The interior of the heat-conducting tube 205 and the flow tube 202 is filled with a thermal conductive agent, and the filling amount of the thermal conductive agent accounts for 80% of the total volume of the heat-conducting tube 205 and the flow tube 202. The thermal conductive agent includes expanded graphite and paraffin, and the ratio of expanded graphite to paraffin is 1:11.5. The heat dissipation component 2 can assist in the heat dissipation of the device, thereby improving the overall heat dissipation effect of the device, so that the charging gun can maintain a longer operation time at a higher power state, so as to improve the current transmission efficiency of the charging gun. The installation box 204 can provide an installation position for the internal components, and the flow tube 202 can guide the thermal conductive agent inside The heat in the heat conducting agent flows through the heat conducting agent, and the heat conducting agent is promoted to circulate after rapid heat dissipation, so as to continuously transfer the heat inside the device. The heat conducting cylinder 205 can be connected with the flow guide tube 202, so that the heat conducting agent surrounds the outside of the high-voltage cable 1, absorbs the heat inside the high-voltage cable 1, expands the heat conduction area of ​​the device, and improves the heat dissipation efficiency. The installation cylinder 201 can be fixedly connected with the high-voltage cable 1, so that the heat conducting cylinder 205 can stably dissipate heat for the high-voltage cable 1. The paraffin in the heat conducting agent is a phase change material. The temperature of the paraffin is within the range of 50 to 90 degrees Celsius. It can undergo phase change, from solid to liquid to absorb heat, and under normal conditions, it can release heat in a solid state. Paraffin has excellent heat storage performance. After being mixed with expanded graphite, the thermal conductor is a phase change energy storage material with flame retardant properties. It has both the flame retardant properties of expanded graphite and the heat storage properties of paraffin. Compared with traditional liquid cooling heat dissipation materials, it can absorb more heat in the same time, thereby greatly improving the heat dissipation efficiency of the charging gun. In addition, when an abnormal short circuit occurs inside the charging gun, it can have a certain flame retardant effect on the high-voltage cable 1, thereby improving the safety of the charging gun during use.

[0038] A plurality of booster assemblies 5 are fixedly mounted on the front of the flow guide tube 202. The booster assemblies 5 can pulse-push the heat conductor, thereby promoting the heat conductor to circulate inside the flow guide tube 202 and the heat-conducting tube 205 and improving the heat conduction efficiency of the heat conductor.

[0039] Furthermore, the boosting assembly 5 includes a boosting cylinder 504, a boosting pipe 503 is fixedly installed at one end of the boosting cylinder 504, and the boosting pipe 503 is installed relatively parallel to the guide pipe 202, an inlet pipe 501 is fixedly installed on the bottom of the boosting pipe 503 close to the side of the boosting cylinder 504, and a manifold 502 is fixedly installed on the bottom of the boosting pipe 503 away from the inlet pipe 501, and the inlet pipe 501 and the manifold 502 are both arranged at an angle of 45 degrees with the guide pipe 202, a spiral coil 506 is fixedly installed on the side of the inside of the boosting cylinder 504 away from the boosting pipe 503, and the boosting cylinder 504 A permanent magnet 505 is movably installed inside, a sealing sleeve is fixedly installed outside the permanent magnet 505, and the permanent magnet 505 is fitted with the inner wall of the boost tube 504. The boost tube 504 can provide a mounting position for the surrounding components. The boost tube 503 can connect the inlet tube 501 and the manifold 502. When the permanent magnet 505 moves, the permanent magnet 505 pushes the heat conductor inside the boost tube 503 to accelerate the flow speed of the heat conductor inside the inlet tube 501 and the manifold 502, and then the accelerated heat conductor flows back to the inside of the guide tube 202, thereby achieving the heat conduction inside the guide tube 202. The heat transfer efficiency of the heat transfer agent is accelerated by the inlet pipe 501, so as to accelerate the heat transfer agent in the flow pipe 202 and the heat transfer tube 205, thereby improving the heat dissipation efficiency of the device as a whole. The inlet pipe 501 can make the heat transfer agent in the flow pipe 202 enter the inside of the booster pipe 503, so as to accelerate the heat transfer agent in the booster tube 504, so as to accelerate the heat transfer agent in the flow pipe 202 and promote the rapid flow of the heat transfer agent. The confluence pipe 502 can guide the accelerated heat transfer agent to merge into the heat transfer agent in the flow pipe 202, thereby promoting the heat transfer agent in the flow pipe 202 to be discharged quickly. The permanent magnet 505 can move inside the boost cylinder 504 to promote the rapid movement of the thermal conductor. The permanent magnet 505 can reciprocate at high speed inside the boost cylinder 504 to promote the accelerated movement of the thermal conductor, so as to increase the flow rate of the thermal conductor. The spiral coil 506 can generate an electromagnetic field after being energized, thereby generating an electromagnet, and by changing the direction of the current, the magnetic pole can be changed rapidly, and then the electromagnetic field generated by the spiral coil 506 is used to drive the permanent magnet 505 to reciprocate, thereby promoting the thermal conductor to flow rapidly inside the guide tube 202.

[0040] Furthermore, a heat dissipation fan 203 is fixedly installed on one side of the interior of the installation box 204, and the heat dissipation fan 203 is consistent with the heat dissipation port inside the installation box 204. The heat dissipation fan 203 adopts the FDL-4C type. After the heat dissipation fan 203 is powered on, it can blow air into the interior of the installation box 204, so as to use the airflow to promote the heat dissipation of the internal components of the installation box 204, so as to dissipate the heat of the guide tube 202, discharge the heat from the interior of the installation box 204, and then make the heat conductive agent inside the guide tube 202 cool down and flow back to the heat conductive tube 205, so as to continuously transfer the heat inside the device.

[0041] Furthermore, the heat-conducting tube 205 is a hollow cylindrical structure, and a heat-conducting cavity is opened in the heat-conducting tube 205, and the heat-conducting cavity is connected to the interior of the flow guide tube 202. The heat-conducting tube 205 can guide the heat-conducting agent to flow inside, so that after the heat is absorbed by the heat-conducting agent, the heat is discharged from the shell 4 through the liquid heat-conducting agent after phase change, thereby achieving heat dissipation for the shell 4 and the high-voltage cable 1.

[0042] Furthermore, a buckle 301 is installed on the top of the cylinder 3 through a pin shaft, and an anti-slip pattern is provided on one side of the top of the buckle 301. The buckle 301 can be engaged with the charging port of the new energy vehicle, and then after the plug head 302 is connected, the plug head 302 is limited and fixed to ensure the stability of the plug head 302 during operation.

[0043] Furthermore, a spring is fixedly installed on the left side of the bottom of the buckle 301 , and the spring is fixedly connected to the top of the cylinder 3 .

[0044] Furthermore, the high-voltage cable 1 passes through the shell 4 and the cylinder 3 , and the high-voltage cable 1 is electrically connected to the plug connector 302 .

[0045] Furthermore, the high-voltage cable 1 includes a battery core and an insulating sleeve, the battery core is electrically connected to the plug head 302, the insulating sleeve is fixedly connected to the shell 4 and the mounting tube 201, the battery core is used to transmit current, and the insulating sleeve is used to protect the battery core to reduce the probability of leakage during operation of the device.

[0046] Working principle: After the device is assembled, the device is powered on through the external power supply of the high-voltage cable 1. When the charging gun is in use, the device is moved to the vicinity of the charging port by holding the handle 401, and the plug head 302 is aligned with the charging port, and the plug head 302 is inserted into the charging port, and the buckle 301 is engaged with the charging port, and the plug head 302 is connected to the internal circuit of the charging port, so that the high-voltage cable 1 is connected to the internal circuit of the charging port to transmit the current;

[0047] When the high-voltage cable 1 generates heat during transmission, the heat generated by the high-voltage cable 1 continuously heats the heat-conducting tube 205. When the temperature rises to above 50 degrees Celsius, the solid heat-conducting agent inside the heat-conducting tube 205 changes into a liquid state, and the temperature difference on both sides of the flow guide tube 202 promotes the heat-conducting agent to flow inside the flow guide tube 202. After absorbing the heat, the heat-conducting agent flows from the heat-conducting tube 205 to the installation box 204, and transfers the heat to the flow guide tube 202. The heat-dissipating fan 203 blows air into the interior of the installation box 204 to dissipate the heat from the guide tube 202, so that the heat is discharged. After the temperature is lowered, the heat-conducting agent The agent then flows back to the heat-conducting cylinder 205 through the flow guide tube 202. When the heat-conducting agent flows inside the flow guide tube 202, the spiral coil 506 generates an electromagnetic field after being energized, and continuously changes the magnetic poles of the magnetic field by adjusting the direction of the current, so as to cause the permanent magnet 505 to move back and forth inside the boosting cylinder 504, thereby promoting the heat-conducting agent inside the boosting tube 503 to flow faster. The accelerated heat-conducting agent enters the flow guide tube 202 through the manifold 502, thereby accelerating the flow of the heat-conducting agent inside the flow guide tube 202, improving the thermal conductivity of the device, and preventing the heat-conducting agent from becoming semi-solid after cooling and causing blockage of the flow guide tube 202.

[0048] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A high-power DC charging gun, comprising a high-voltage cable (1), a heat dissipation component (2), a housing (4) and a boost component (5), characterized in that: A handle (401) is fixedly mounted on the top of the housing (4); A cylinder (3) is fixedly mounted on the right side of the shell (4), and a plug connector (302) is fixedly mounted on the right side of the cylinder (3); A high-voltage cable (1) is fixedly installed on the left side of the housing (4); A heat dissipation component (2) is fixedly mounted on the bottom of the shell (4), the heat dissipation component (2) comprises a mounting box (204), the front and back sides of the mounting box (204) are both provided with heat dissipation holes, a plurality of air inlet holes are opened at the bottom of the mounting box (204), and two inclined surfaces are provided at the bottom of the mounting box (204), a flow guide tube (202) is fixedly mounted inside the mounting box (204), and both ends of the flow guide tube (202) extend out of the mounting box (204) and are provided with flow guide tubes. A heat cylinder (205), wherein a mounting cylinder (201) is fixedly mounted on the inner side of the heat-conducting cylinder (205), and the mounting cylinder (201) is fixedly connected to the inner wall of the high-voltage cable (1) and the housing (4), respectively; the interior of the heat-conducting cylinder (205) and the flow-conducting tube (202) are filled with a heat-conducting agent, and the filling amount of the heat-conducting agent accounts for 80% of the total volume of the heat-conducting cylinder (205) and the flow-conducting tube (202); the heat-conducting agent comprises expanded graphite and paraffin, and the ratio of the expanded graphite to the paraffin is 1:11.5; A plurality of groups of booster components (5) are fixedly mounted on the front side of the flow guide pipe (202).

2. A high-power DC charging gun according to claim 1, characterized in that: The boosting assembly (5) comprises a boosting cylinder (504), a boosting pipe (503) is fixedly mounted on one end of the boosting cylinder (504), and the boosting pipe (503) is mounted relatively parallel to the flow guide pipe (202), an inlet pipe (501) is fixedly mounted on the bottom of the boosting pipe (503) close to the boosting cylinder (504), and a converging pipe (502) is fixedly mounted on the bottom of the boosting pipe (503) away from the inlet pipe (501). The inlet pipe (501) and the conduit (502) are both provided with an angle of 45 degrees with the guide pipe (202); a spiral coil (506) is fixedly installed on the side of the boost cylinder (504) away from the boost pipe (503); a permanent magnet (505) is movably installed inside the boost cylinder (504); a sealing sleeve is fixedly installed on the outside of the permanent magnet (505); and the permanent magnet (505) is in contact with the inner wall of the boost cylinder (504).

3. A high-power DC charging gun according to claim 1, characterized in that: A heat dissipation fan (203) is fixedly installed on one side of the interior of the installation box (204), and the heat dissipation fan (203) is aligned with the heat dissipation port inside the installation box (204).

4. A high-power DC charging gun according to claim 1, characterized in that: The heat-conducting tube (205) is a hollow cylindrical structure, and a heat-conducting cavity is provided inside the heat-conducting tube (205), and the heat-conducting cavity is communicated with the interior of the flow-conducting tube (202).

5. A high-power DC charging gun according to claim 1, characterized in that: A buckle (301) is installed on the top of the cylinder (3) via a pin shaft, and one side of the top of the buckle (301) is provided with anti-slip grooves.

6. A high-power DC charging gun according to claim 5, characterized in that: A spring is fixedly mounted on the left side of the bottom of the buckle (301), and the spring is fixedly connected to the top of the cylinder (3).

7. A high-power DC charging gun according to claim 1, characterized in that: The high-voltage cable (1) passes through the shell (4) and the cylinder (3), and the high-voltage cable (1) is electrically connected to the plug head (302).

8. A high-power DC charging gun according to claim 7, characterized in that: The high-voltage cable (1) comprises a battery core and an insulating sleeve, the battery core is electrically connected to a plug head (302), and the insulating sleeve is fixedly connected to a housing (4) and a mounting tube (201).

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