Charging gun for megawatt new energy automobile

Abstract

The invention discloses a charging gun for a megawatt new energy automobile, and belongs to the technical field of new energy vehicles, the charging gun comprises an end base plate, a cable base plate, a cooling cavity shell and a pump flow assembly, an end is fixedly assembled at one end of the end base plate, a columnar cavity is further formed in the end, the cable base plate is fixedly connected with the end base plate, and the cable base plate is fixedly connected with the cooling cavity shell. The cooling cavity shell is fixedly inserted into the cable bottom plate, one end of the cooling cavity shell is communicated with a liquid inlet pipe, the other end of the cooling cavity shell is communicated with one side of the columnar cavity, the conductor is assembled in the cooling cavity shell and the liquid inlet pipe, the tail end of the conductor is fixedly connected with positive and negative terminals, the positive and negative terminals are arranged in the end, and the pump flow assembly is used for inputting cooling liquid into the cooling cavity shell. The multiple cooling shell assemblies are independently arranged at one end of the cable bottom plate, the heat exchange efficiency between the cooling liquid and the terminals can be improved in the cooling liquid pumping process, meanwhile, the pump flow of the cooling liquid can be adjusted in a self-adaptive mode according to the temperature values of different terminal sides, the pump flow power consumption is reduced, and the purposes of energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicles, and specifically relates to a charging gun for megawatt-class new energy vehicles. Background Art

[0002] With the rapid development of new energy electric vehicles, the demand for charging scenarios such as electric heavy trucks, electric ships and electric aircraft has emerged. Reducing charging time and increasing cruising range have become the main factors affecting the development of the industry. The charging current required for electric heavy trucks, electric ships and electric aircraft can be designed to reach 3000A, the charging voltage can reach up to 1250V, and the charging power can reach 3.75MW.

[0003] Due to the extremely high charging power of the MCS megawatt charging system, the cable cross-section area needs to be larger and thicker. This will cause the contact temperature of several key contact points of the charging system: between the cable inside the gun and the gun head terminal, between the gun head terminal and the vehicle socket, and between the socket and the wiring harness inside the vehicle. These connection points will be relatively high, which will not only cause the equipment to malfunction due to high temperature aging, but also the high temperature will continue to reduce the service life of the equipment. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the embodiments of the present invention is to provide a charging gun for megawatt-level new energy vehicles to solve the problems in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A charging gun for megawatt-class new energy vehicles includes a terminal assembly, the terminal assembly comprising a terminal base plate, a terminal, a plug hole, and a cylindrical cavity. The terminal base plate is fixedly mounted on one end of the terminal, the terminal is provided with a plug hole, and the cylindrical cavity is further provided inside the plug hole.

[0007] A cable assembly, wherein the cable assembly includes a cable base plate and an end base plate fixedly connected;

[0008] A cooling shell assembly, comprising a cooling chamber shell, a liquid inlet pipe, a conductor, positive and negative terminals, and a drainage pipe. One end of the cooling chamber shell is fixedly plugged into the cable base plate, and the other end of the cooling chamber shell is connected to the liquid inlet pipe. The conductor is coaxially assembled in the cooling chamber shell and the liquid inlet pipe, and the ends of the conductor are also fixedly connected to the positive and negative terminals, which are arranged in the plug-in holes. A drainage pipe is also provided at one end of the cooling chamber shell, and the drainage pipe passes through the cable base plate and is connected to the columnar cavity.

[0009] A pump flow assembly, which includes a controller, a diverter tube, an injection tube and a separation chamber. The controller is fixedly mounted on one side of the cable base plate. The diverter tube is mounted on the controller. The diverter tube is provided with an injection tube and several separation chambers. One end of several of the separation chambers is connected to the injection tube, and the other end of the separation chamber is connected to the liquid inlet tube.

[0010] As a further solution of the present invention, the end head assembly also includes a partition, and a plurality of the partitions are arranged in a circumferential array in the columnar cavity to divide the columnar cavity into a plurality of independent cavities, and the drainage tube is connected to any group of cavities.

[0011] As a further solution of the present invention, a plurality of partitions arranged in a circumferential array are provided with first guide holes and second guide holes at intervals, and the first guide holes and the second guide holes are respectively provided at two ends of the cavity.

[0012] As a further solution of the present invention, the cable assembly also includes a temperature sensor and a control line. One end of several of the temperature sensors passes through the cable base and is plugged into one side of the end base, and the temperature sensor is arranged near one end of the positive and negative terminals. The other end of the temperature sensor is connected to the control line, and the control line is electrically connected to the controller.

[0013] As a further solution of the present invention, the cooling shell assembly further includes a spiral flow channel, which is fixedly disposed in the inner cavity of the cooling cavity shell, and a gap is formed between the spiral flow channel and the conductor.

[0014] As a further solution of the present invention, the pump flow assembly also includes a pump flow hole, a diverter tube and a blocking valve. Several of the pump flow holes are arranged on the cavity wall of the injection tube. One end of the diverter tube is connected to the separation cavity, and the other end of the diverter tube is connected to the liquid inlet pipe on the adjacent side. The blocking valve is slidably assembled in the separation cavity for movably blocking the pump flow hole.

[0015] As a further solution of the present invention, the pump flow assembly also includes a side port, an electrically controlled telescopic rod and an axis bracket. Several of the side ports are arranged on the cavity wall of the diversion cylinder. One end of the electrically controlled telescopic rod is rotatably assembled on the controller and electrically connected to the control line. The axis bracket is fixedly assembled on the movable shaft at the other end of the electrically controlled telescopic rod. The axis bracket passes through the side port and is rotatably connected to the blocking valve.

[0016] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art:

[0017] The present invention independently arranges a plurality of cooling shell assemblies at one end of the cable base plate, thereby increasing the heat exchange efficiency between the coolant and the terminal during the process of pumping the coolant. At the same time, the pump flow rate of the coolant can be adaptively adjusted according to the temperature values ​​on different terminal sides, thereby saving pump flow power consumption and achieving the purpose of energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a partial cross-sectional view of a charging gun for a megawatt-class new energy vehicle provided in one embodiment of the present invention.

[0019] Figure 2 This is a schematic structural diagram of a charging gun for a megawatt-class new energy vehicle provided in one embodiment of the present invention.

[0020] Figure 3 This is a structural schematic diagram of the charging gun marked A in the figure for a megawatt-class new energy vehicle provided in an embodiment of the present invention.

[0021] Figure 4 This is a schematic side structural diagram of a charging gun for a megawatt-class new energy vehicle provided in one embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the bottom structure of a charging gun for a megawatt-class new energy vehicle provided in an embodiment of the present invention.

[0023] Figure 6 This is a schematic structural diagram of the charging gun marked B in the figure for a megawatt-class new energy vehicle provided in an embodiment of the present invention.

[0024] Figure 7 This is a schematic structural diagram of a middle terminal base plate of a charging gun for a megawatt-class new energy vehicle provided in one embodiment of the present invention.

[0025] Figure 8 This is a schematic structural diagram of the first guide hole and the second guide hole in a charging gun for a megawatt-class new energy vehicle provided in an embodiment of the present invention.

[0026] Figure markings: 1-end assembly, 101-end base plate, 102-end, 103-plug hole, 104-columnar cavity, 105-partition, 106-first guide hole, 107-second guide hole, 2-cable assembly, 201-cable base plate, 202-temperature sensor, 203-control line, 3-cooling shell assembly, 301-cooling chamber shell, 302-liquid inlet pipe, 303-conductor, 304-positive and negative terminals, 305-drainage pipe, 306-discharge pipe, 4-pump flow assembly, 401-controller, 402-shunt cylinder, 403-injection pipe, 404-partition cavity, 405-pump flow hole, 406-shunt pipe, 407-blocking valve, 408-side port, 409-electrically controlled telescopic rod, 410-axis bracket. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] See also Figures 1-8 , a megawatt-class new energy vehicle charging gun in one embodiment of the present invention includes an end assembly 1, the end assembly 1 includes an end base plate 101, an end 102, a plug hole 103 and a columnar cavity 104, one end of the end base plate 101 is fixedly assembled with the end 102, the end 102 is provided with a plug hole 103, and a columnar cavity 104 is further provided inside the plug hole 103; a cable assembly 2, the cable assembly 2 includes a cable base plate 201 fixedly connected to the end base plate 101; a cooling shell assembly 3, the cooling shell assembly 3 includes a cooling chamber shell 301, a liquid inlet pipe 302, a conductor 303, positive and negative terminals 304 and a drainage pipe 305, one end of the cooling chamber shell 301 is fixedly plugged into the cable base plate 201, the other end of the cooling chamber shell 301 is connected to the liquid inlet pipe 302, the conductor 303 It is coaxially assembled in the cooling chamber shell 301 and the liquid inlet pipe 302, and the ends of the conductor 303 are also fixedly connected with positive and negative terminals 304, and the positive and negative terminals 304 are arranged in the plug hole 103. One end of the cooling chamber shell 301 is also provided with a drainage tube 305, and the drainage tube 305 passes through the cable base plate 201 and is connected to the columnar cavity 104; the pump flow component 4, the pump flow component 4 includes a controller 401, a diverter tube 402, an injection tube 403 and a separation chamber 404, the controller 401 is fixedly assembled on one side of the cable base plate 201, and the controller 401 is equipped with a diverter tube 402, and the diverter tube 402 is provided with an injection tube 403 and several separation chambers 404, one end of several of the separation chambers 404 is connected to the injection tube 403, and the other end of the separation chamber 404 is connected to the liquid inlet pipe 302.

[0029] In actual application of this embodiment, when the megawatt-class new energy vehicle charging gun is used, the main body of the charging gun head is composed of an end base plate 101 and a cable base plate 201. One end of the end base plate 101 is fixedly equipped with an end 102, and several cooling shell assemblies 3 connected to the gun head cables are fixedly plugged into the cable base plate 201, and the ends of the conductors 303 inside the cooling chamber shell 301 are connected to the positive and negative terminals 304. The positive and negative terminals 304 are positioned and assembled in the plug holes 103 on one side of the end 102. In actual operation, since local high temperatures are easily generated between the cables in the gun and the gun head terminals, the gun head terminals and the vehicle socket, and the socket and the wiring harness in the vehicle, the gun head continuously pumps coolant into the gun head through the hose on one side of the injection pipe 403. The coolant flows through the injection pipe 403 and the partition chamber 404 and then flows into the liquid inlet pipe. In 302, the liquid inlet pipe 302 is connected to the cooling chamber shell 301, and the cooling chamber shell 301 and the liquid inlet pipe 302 are both sleeved on the conductor 303, so that when the pumped coolant flows from the inner cavity of the liquid inlet pipe 302 to the inner cavity of the cooling chamber shell 301, the conductor 303 can be directly immersed in the coolant. When the coolant enters the columnar cavity 104 through the drainage pipe 305, the coolant can also continuously absorb heat from the shell on one side of the end base plate 101 during the flow process, so that the terminal plugged into the interior of the vehicle can be continuously cooled, and the flow direction of the coolant is limited to moving from the low-heat end to the high-heat end, so that the coolant can continuously absorb heat during the flow process, thereby increasing the heat exchange efficiency, making full use of the coolant, reducing the flow rate of the coolant per unit time, reducing the power consumption of the coolant pump end, and achieving the purpose of energy saving and emission reduction.

[0030] In one case of this embodiment, the terminal base plate 101 and the cable base plate 201 are connected by ultrasonic welding. Ultrasonic welding has high welding strength and can process materials with high thermal conductivity.

[0031] See also Figure 7 In a preferred embodiment of the present invention, the end head assembly 1 further includes a partition 105, and a plurality of the partitions 105 are arranged in a circumferential array in the columnar cavity 104 to divide the columnar cavity 104 into a plurality of independent cavities, and the drainage tube 305 is connected to any group of cavities.

[0032] In actual application of this embodiment, the several partitions 105 divide the columnar cavity 104 into several independent cavities, and the several cavities form an annular fluid cavity in the circumferential direction, so that the coolant pumped in through the drainage tube 305 can move through the annular flow channel, and during the movement, it is in full contact with the inner cavity wall of the plug hole 103 to achieve heat absorption on one side of the car plug port, and the end of the annular flow channel is connected to the drain pipe 306, the end of the drain pipe 306 passes through the end base plate 101 and is arranged on one side of the cable base plate 201, and a one-way check valve is provided on the drain pipe 306 to prevent the coolant from flowing back in the pipe.

[0033] In one case of this embodiment, a first guide hole 106 and a second guide hole 107 are arranged at intervals on a plurality of partitions 105 arranged in a circumferential array, and the first guide hole 106 and the second guide hole 107 are respectively arranged at both ends of the cavity, so that when the coolant flows between the plurality of cavities, the movement stroke of the coolant can be increased, so that the coolant can fully contact the inner cavity wall of the plug hole 103, thereby increasing the heat exchange efficiency.

[0034] See also Figure 4 In a preferred embodiment of the present embodiment, the cable assembly 2 further includes a temperature sensor 202 and a control line 203. One end of several of the temperature sensors 202 passes through the cable base plate 201 and is plugged into one side of the terminal base plate 101. The temperature sensor 202 is arranged near one end of the positive and negative terminals 304. The other end of the temperature sensor 202 is connected to the control line 203, and the control line 203 is electrically connected to the controller 401.

[0035] In actual application of this embodiment, the temperature sensor 202 can perform periodic temperature detection, and independently detect several terminals through several temperature sensors 202, input the detection signal into the controller 401 through the control line 203, and control the pump flow rate in the diversion cylinder 402 through the controller 401. The pump flow rate on the terminal side can be independently controlled according to the temperature detection results of several terminals. When the temperature on the terminal side is too high, the input flow rate of the coolant is increased. When the temperature on the terminal side is too low, the input flow rate of the coolant is reduced, thereby improving the utilization rate of the coolant.

[0036] See also Figure 3 In a preferred embodiment of the present invention, the cooling shell assembly 3 further includes a spiral flow channel 307 , which is fixedly disposed in the inner cavity of the cooling cavity shell 301 , and a gap is formed between the spiral flow channel 307 and the conductor 303 .

[0037] In actual application of this embodiment, the spiral flow channel 307 is arranged on the inner cavity side of the cooling cavity shell 301, which can enable the pumped coolant to move in the spiral flow channel. On the one hand, it increases the movement stroke of the coolant in the cavity, and on the other hand, it reduces the flow speed of the coolant, thereby increasing the contact time between the coolant and the conductor 303, thereby improving the heat absorption efficiency.

[0038] In one case of this embodiment, sealing rings 308 are provided at the ends of the cooling cavity shell 301 and the liquid inlet pipe 302 to limit leakage of the cooling liquid.

[0039] See also Figure 6 In a preferred embodiment of the present invention, the pump flow component 4 also includes a pump flow hole 405, a diverter tube 406 and a blocking valve 407. Several of the pump flow holes 405 are arranged on the cavity wall of the injection tube 403. One end of the diverter tube 406 is connected to the separation cavity 404, and the other end of the diverter tube 406 is connected to the liquid inlet pipe 302 on the adjacent side. The blocking valve 407 is slidably assembled in the separation cavity 404 for movably blocking the pump flow hole 405.

[0040] In actual application of this embodiment, the pump flow hole 405 is arranged on the cavity wall of the injection tube 403, and the blocking valve 407 is slidably arranged in the separation cavity 404. The blocking valve 407 and the separation cavity 404 are slidingly sealed, and when the blocking valve 407 slides along the inner wall of the separation cavity 404, it can linearly block the orifice size of one end of the pump flow hole 405. When the pump flow pressure remains unchanged, the larger the orifice diameter, the greater the flow rate, and the smaller the orifice diameter, the smaller the flow rate, thereby controlling the pump flow rate on several terminal sides.

[0041] In one case of this embodiment, the end of the blocking valve 407 is set to a chute surface so that when it blocks the opening on one side of the pump flow hole 405, it avoids interfering with the pump flow at the pipe opening on one side of the diversion pipe 406.

[0042] See also Figure 6 In a preferred embodiment of the present invention, the pump flow assembly 4 also includes a side port 408, an electrically controlled telescopic rod 409 and an axis support 410. Several of the side ports 408 are arranged on the cavity wall of the diversion cylinder 402. One end of the electrically controlled telescopic rod 409 is rotatably assembled on the controller 401 and electrically connected to the control line 203. The axis support 410 is fixedly assembled on the movable shaft at the other end of the electrically controlled telescopic rod 409. The axis support 410 passes through the side port 408 and is rotatably connected to the blocking valve 407.

[0043] In actual application of this embodiment, the side port 408 is arranged on the cavity wall of the diversion cylinder 402, and several electrically controlled telescopic rods 409 independently controlled by the controller 401 are arranged on one side of the side port 408, and the shaft bracket 410 assembled on the movable axis of the electrically controlled telescopic rod 409 passes through the side port 408 and is rotatably assembled on the blocking valve 407, so that the electrically controlled telescopic rod 409 can control the extension and contraction amount of its movable axis in the electrically controlled state, and synchronously control the sliding position of the blocking valve 407 in the separation cavity 404 to adjust the orifice size of one end of the pump flow hole 405, thereby adaptively adjusting the pump flow of the coolant according to the temperature detection result on the terminal side.

[0044] The above embodiment of the present invention provides a charging gun for megawatt-class new energy vehicles. By independently arranging a plurality of cooling shell assemblies 3 at one end of the cable base plate 201, the heat exchange efficiency between the coolant and the terminal can be increased during the pumping of the coolant. At the same time, the pump flow rate of the coolant can be adaptively adjusted according to the temperature values ​​on different terminal sides, thereby saving pump flow power consumption and achieving the purpose of energy conservation and emission reduction.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A charging gun for megawatt-class new energy vehicles, characterized in that: The megawatt-class new energy vehicle charging gun includes: The terminal assembly comprises a terminal base plate, a terminal, a plug hole and a columnar cavity, wherein the terminal is fixedly mounted on one end of the terminal base plate, the terminal is provided with a plug hole, and a columnar cavity is further provided inside the plug hole; A cable assembly, wherein the cable assembly includes a cable bottom plate and a terminal bottom plate fixedly connected; A cooling shell assembly, the cooling shell assembly comprising a cooling cavity shell, a liquid inlet pipe, a conductor, positive and negative terminals and a drainage pipe, one end of the cooling cavity shell is fixedly plugged into the cable bottom plate, the other end of the cooling cavity shell is connected with the liquid inlet pipe, the conductor is coaxially assembled in the cooling cavity shell and the liquid inlet pipe, and the end of the conductor is also fixedly connected with the positive and negative terminals, the positive and negative terminals are arranged in the plug-in hole, one end of the cooling cavity shell is also provided with a drainage pipe, the drainage pipe passes through the cable bottom plate and is connected with the columnar cavity; A pump flow assembly, the pump flow assembly includes a controller, a diverter tube, an injection tube and a separation chamber, the controller is fixedly mounted on one side of the cable base plate, the controller is equipped with a diverter tube, the diverter tube is provided with an injection tube and a plurality of separation chambers, one end of the plurality of separation chambers is connected to the injection tube, and the other end of the separation chamber is connected to the liquid inlet tube.

2. A megawatt-class new energy vehicle charging gun according to claim 1, characterized in that: The end head assembly also includes a partition, and a plurality of the partitions are arranged in a circumferential array in the columnar cavity so as to divide the columnar cavity into a plurality of independent cavities, and the drainage tube is connected to any group of cavities.

3. A megawatt-class new energy vehicle charging gun according to claim 1, characterized in that: A plurality of baffles arranged in a circumferential array are provided with first guide holes and second guide holes at intervals, and the first guide holes and the second guide holes are respectively provided at two ends of the cavity.

4. A megawatt-class new energy vehicle charging gun according to claim 1, characterized in that: The cable assembly also includes a temperature sensor and a control line. One end of several of the temperature sensors passes through the cable base plate and is plugged into one side of the terminal base plate, and the temperature sensor is arranged near one end of the positive and negative terminals. The other end of the temperature sensor is connected to the control line, and the control line is electrically connected to the controller.

5. A megawatt-class new energy vehicle charging gun according to claim 1, characterized in that: The cooling shell assembly further comprises a spiral flow channel, which is fixedly arranged in the inner cavity of the cooling cavity shell, and a clearance fit is formed between the spiral flow channel and the conductor.

6. A megawatt-class new energy vehicle charging gun according to claim 1, characterized in that: The pump flow assembly also includes a pump flow hole, a shunt tube and a blocking valve. Several of the pump flow holes are arranged on the cavity wall of the injection tube. One end of the shunt tube is connected to the separation cavity, and the other end of the shunt tube is connected to the liquid inlet pipe on the adjacent side. The blocking valve is slidably assembled in the separation cavity to flexibly block the pump flow holes.

7. A megawatt-class new energy vehicle charging gun according to claim 6, characterized in that: The pump flow assembly also includes a side port, an electrically controlled telescopic rod and an axis bracket. Several of the side ports are arranged on the cavity wall of the diversion cylinder. One end of the electrically controlled telescopic rod is rotatably assembled on the controller and electrically connected to the control line. The axis bracket is fixedly assembled on the movable shaft at the other end of the electrically controlled telescopic rod. The axis bracket passes through the side port and is rotatably connected to the blocking valve.

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