Two-core charging device of electric automobile and assembling method thereof

Abstract

The invention relates to the technical field of new energy automobile power connectors, and discloses a two-core charging device of an electric automobile and an assembling method of the two-core charging device. Comprising a metal protective shell, a transverse mounting cavity, a vertical mounting cavity, a lining limiting piece, a limiting nut, a conversion terminal, a plugging terminal, an expansion type limiting mechanism, a cable and a tail cover, according to the invention, the expansion type limiting mechanism for hooping and positioning the cable inner core and the conversion terminal is additionally arranged on the lining limiting piece, so that the expansion type limiting mechanism can be driven to perform rear-section type sudden expansion in the process of inserting the cable tail cover into the protective shell; therefore, the expansion type limiting mechanism can stably limit and fix the cable inner core and the conversion terminal when the cable inner core and the conversion terminal are in a handover state, the situation that the inner core and the conversion terminal break in the use process is prevented, the conversion terminal and the cable do not need to be connected in advance, the production cost is reduced, and the economic benefit is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power connectors for new energy vehicles, and more specifically, to a two-core charging device for an electric vehicle and an assembly method thereof. Background Art

[0002] An electrical connector is a device used for electrical connection, and its main function is to provide reliable electrical connection and transmit current and signals. In the prior art, with the continuous development and application of high-power electronic equipment in the field of new energy vehicles, the demand for high-performance connectors is also growing continuously.

[0003] When assembling an existing charging connector, it is necessary to electrically connect the cable and the socket terminal through the adapter terminal, and the socket terminal and the adapter terminal are limited and fixed by nuts, while the adapter terminal and the cable need to be connected by ultrasonic welding, crimping, etc. to improve the firmness and reliability of the connection. However, no matter which connection method is used, pre-processing is required before assembly, and corresponding manual or mechanical automation processes need to be added for processing, which is not only time-consuming but also costly. Summary of the invention

[0004] The purpose of the present invention is to provide a two-core charging device for an electric vehicle and an assembly method thereof in order to solve the above-mentioned problem.

[0005] The present invention provides a two-core charging device for an electric vehicle, comprising a metal protective shell, a transverse mounting cavity and a vertical mounting cavity arranged in the metal protective shell, a liner stopper inserted in the transverse mounting cavity, a stopper nut and a transfer terminal detachably connected to the liner stopper, a plug-in terminal inserted in the vertical mounting cavity, an expansion stopper mechanism connected to the liner stopper, a cable inserted in the transverse mounting cavity, and a tail cover connected to the cable, wherein the transverse mounting cavity and the vertical mounting cavity are connected, an inner core at one end of the cable contacts the transfer terminal, and one end of the plug-in terminal passes through the transfer terminal and is threadedly connected to the stopper nut; The expansion type limit mechanism comprises a telescopic liquid storage component connected to the open end of the liner limiter, an energy storage switch component arranged inside the liner limiter, and an expansion component connected to the inner wall of the liner limiter; When the tail cover is inserted into the metal protective housing, pressure is applied to the telescopic liquid storage assembly to cause it to deform; When the telescopic liquid storage component is deformed to a set state, the internal air pressure controls the energy storage switch component to be in a first position state. When the energy storage switch component is in the first position state, the internal space of the telescopic liquid storage component is connected to the internal space of the expansion component. The expansion assembly is used to limit and fix the junction area between the inner core at one end of the cable and the transfer terminal.

[0006] As a further optimization scheme of the present invention, the plug-in terminal includes a socket terminal, a screw connecting part connected to the closed end of the socket terminal, a limiting rod connected to the screw connecting part, and a rotating spring contact connected to the inner wall of the socket terminal, one end of the screw connecting part passes through the adapter terminal and is threadedly connected to the limiting nut, and the adapter terminal is located between the limiting nut and the socket terminal.

[0007] As a further optimization scheme of the present invention, the lining limit piece is provided with a limit hole matching the limit nut, and the adapter terminal is provided with an avoidance hole for one end of the screw connecting part to pass through, and the diameter of the avoidance hole is larger than the diameter of one end of the plug-in terminal.

[0008] As a further optimization scheme of the present invention, the telescopic liquid storage assembly includes a first U-shaped connecting frame plate connected to the open end of the lining limiter, a second U-shaped connecting frame plate arranged parallel to the first U-shaped connecting frame plate, a first U-shaped corrugated tube and a second U-shaped corrugated tube connected between the first U-shaped connecting frame plate and the second U-shaped connecting frame plate, a guide support rod connected to the second U-shaped connecting frame plate, a hollow slider connected to the other end of the guide support rod, and a liquid guide hole provided on the first U-shaped connecting frame plate, a sealed liquid storage chamber is formed between the first U-shaped connecting frame plate, the first U-shaped corrugated tube, the second U-shaped corrugated tube and the second U-shaped connecting frame plate, the liquid guide hole is connected to the sealed liquid storage chamber, a liquid guide channel is provided on the open end surface of the lining limiter, the liquid guide channel is connected to the sealed liquid storage chamber through the liquid guide hole, one end of the guide support rod passes through the liquid guide hole and extends into the liquid guide channel, and the hollow slider is slidably connected to the inner wall of the liquid guide channel.

[0009] As a further optimization scheme of the present invention, the energy storage switch assembly includes a spring connected to the inner wall of the liquid conducting channel, a piston member connected to the other end of the spring, and a first branch channel arranged inside the lining limit member. The expansion assembly is connected to the liquid conducting channel through the first branch channel, and the piston member is in close contact with the inner wall of the liquid conducting channel. When the piston member moves to the first branch channel and the area between the piston member and the first U-shaped connecting frame plate is connected to the first branch channel, the piston member is in a first position state.

[0010] As a further optimization scheme of the present invention, the expansion assembly includes an expandable bladder connected to the inner wall of the liner limiter and a connecting terminal connected to the expandable bladder, and the connecting terminal of the expandable bladder is connected to the first branch channel.

[0011] As a further optimization scheme of the present invention, a circulating temperature regulating mechanism is provided on the metal protective shell, and when the internal air pressure of the expansion assembly and the telescopic liquid storage assembly reaches a set pressure value, the energy storage switch assembly is in the second position state; When the energy storage switch assembly is in the second position, the internal spaces of the circulating temperature regulating mechanism, the expansion assembly and the telescopic liquid storage assembly are interconnected.

[0012] As a further optimization scheme of the present invention, the circulating temperature control mechanism includes a circulating circulation component arranged on the inner wall of the metal protective shell and a heat dissipation component connected to the outer wall of the metal protective shell, and one end of the heat dissipation component penetrates the metal protective shell and extends into the interior of the circulating circulation component.

[0013] As a further optimization scheme of the present invention, the circulating flow component includes a plurality of third branch channels and an annular inner circulation channel provided in the metal protective shell, the plurality of third branch channels are all connected to the annular inner circulation channel, the inner lining limiter is provided with a plurality of second branch channels connected to the third branch channels, and the third branch channels are connected to the liquid guide channel through the second branch channels; The heat dissipation assembly comprises a heat sink connected to the outer wall of the metal protective shell and a plurality of heat conducting members connected to the heat sink. The other end of the heat conducting member penetrates the metal protective shell and extends into the annular inner circulation channel.

[0014] A method for assembling a two-core charging device for an electric vehicle is used to assemble a two-core charging device for an electric vehicle as described above, and specifically comprises the following steps: Step 100: Install the limit nut and the adapter terminal on the lining limit piece in sequence and match them with the corresponding limit grooves on the lining limit piece; Step 200: insert the liner limiter equipped with the limit nut and the adapter terminal from the transverse installation cavity of the metal protective housing; Step 300: insert the plug-in terminal from the vertical installation cavity of the metal protective housing, and rotate the plug-in terminal until the plug-in terminal is stably connected to the limit nut; Step 400: insert the cable into the vertical installation cavity of the metal protective shell until the tail cover on the cable is snap-fitted with the metal protective shell.

[0015] The beneficial effects of the present invention are as follows: an expansion limit mechanism is added to the lining limit piece to tightly position the cable inner core and the adapter terminal, and the expansion limit mechanism can be driven to perform a rear-stage sudden expansion through the process of inserting the tail cover of the cable into the protective shell, so that the expansion limit mechanism can stably limit and fix the cable inner core and the adapter terminal when they are in a connecting state, thereby preventing the inner core and the adapter terminal from being disconnected during use, and there is no need to pre-connect the adapter terminal and the cable, thereby reducing production costs and improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 The present invention Figure 1 sectional view of Figure 3 The present invention Figure 2 A magnified view of point A in FIG. Figure 4 The present invention Figure 2 Magnified view of point B in FIG.

[0017] In the figure: 1. Metal protective shell; 201. Socket terminal; 202. Screw connection part; 203. Limit rod; 204. Rotary spring contact; 3. Limit nut; 4. Liner limiter; 5. Cable; 501. Tail cover; 6. Expansion limit mechanism; 601. First U-shaped connecting frame plate; 6010. Liquid guide hole; 602. First U-shaped bellows; 603. Second U-shaped bellows; 604. Second U-shaped connecting frame plate; 605. Liquid guide channel; 606. Guide support rod; 607. Hollow slider; 608. Spring; 609. Piston; 610. First branch channel; 611. Expansion capsule; 7. Circulation temperature control mechanism; 701. Second branch channel; 702. Third branch channel; 703. Annular inner circulation channel; 704. Heat sink; 705. Heat conductor; 8. Adapter terminal. DETAILED DESCRIPTION

[0018] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only intended to enable those skilled in the art to better understand and implement the subject matter described herein. In addition, the features described relative to some examples may also be combined in other examples.

[0019] like Figure 1-Figure 4 As shown, a two-core charging device for an electric vehicle comprises a metal protective shell 1, a horizontal mounting cavity and a vertical mounting cavity arranged in the metal protective shell 1, a liner stopper 4 inserted in the horizontal mounting cavity, a stopper nut 3 and a transfer terminal 8 detachably connected to the liner stopper 4, a plug-in terminal inserted in the vertical mounting cavity, an expansion stopper mechanism 6 connected to the liner stopper 4, a cable 5 inserted in the horizontal mounting cavity, and a tail cover 501 connected to the cable 5, wherein the horizontal mounting cavity and the vertical mounting cavity are connected, an inner core of one end of the cable 5 contacts the transfer terminal 8, and one end of the plug-in terminal passes through the transfer terminal 8 and is threadedly connected to the stopper nut 3; The expansion type limiting mechanism 6 comprises a telescopic liquid storage component connected to the open end of the lining limiting member 4, an energy storage switch component arranged inside the lining limiting member 4, and an expansion component connected to the inner wall of the lining limiting member 4; When the tail cover 501 is inserted into the metal protective housing 1, pressure is applied to the telescopic liquid storage assembly and causes it to deform; When the telescopic liquid storage component is deformed to a set state, the internal air pressure controls the energy storage switch component to be in a first position state. When the energy storage switch component is in the first position state, the internal space of the telescopic liquid storage component is connected to the internal space of the expansion component. The expansion assembly is used to limit and fix the junction area between the inner core at one end of the cable 5 and the transfer terminal 8.

[0020] It should be noted that when assembling the two-core charging device of the electric vehicle as described above, the following steps are specifically included: Install the limiting nut 3 and the transfer terminal 8 onto the lining limiting member 4 in sequence and match them with the corresponding limiting grooves on the lining limiting member 4; Insert the liner stopper 4 equipped with the stopper nut 3 and the transfer terminal 8 from the transverse installation cavity of the metal protective housing 1; Insert the plug-in terminal from the vertical installation cavity of the metal protective housing 1, and rotate the plug-in terminal until the plug-in terminal is stably connected to the limit nut 3; Insert the cable 5 into the vertical installation cavity of the metal protective housing 1 until the tail cover 501 on the cable 5 is snap-fitted with the metal protective housing 1. It should be noted that, in the process of the tail cover 501 being clamped with the metal protective shell 1, the end of the tail cover 501 first contacts the movable end of the telescopic liquid storage component and gradually squeezes its movable end, the telescopic liquid outlet component is gradually compressed, and its internal volume becomes smaller, the internal liquid is compressed and moves to the energy storage switch component, and the energy storage switch component gradually changes its own shape and is compressed as the pressure increases, until the energy storage switch component no longer closes the liquid inlet end of the expansion component, at this time, the compressed liquid is instantly released into the expansion component, so that the expansion component can expand and deform rapidly and perform a tight clamp-type pressure limit on the junction of the inner core at one end of the cable 5 and the adapter terminal 8, so that the inner core and the adapter terminal 8 can always be in a close contact state, and through this energy storage switch component, time and space can be provided for the insertion of the cable 5, and the expansion limit can be instantly released when the inner core reaches the specified position.

[0021] In one embodiment of the present invention, Figure 2 As shown, the plug-in terminal includes a socket terminal 201, a screw connection part 202 connected to the closed end of the socket terminal 201, a limiting rod 203 connected to the screw connection part 202, and a spring contact 204 connected to the inner wall of the socket terminal 201. One end of the screw connection part 202 passes through the adapter terminal 8 and is threadedly connected to the limiting nut 3. The adapter terminal 8 is located between the limiting nut 3 and the socket terminal 201.

[0022] The lining limiter 4 is provided with a limit hole matching the limit nut 3, and the adapter terminal 8 is provided with an avoidance hole for one end of the screw connection part 202 to pass through, and the diameter of the avoidance hole is larger than the diameter of one end of the plug terminal.

[0023] It should be noted that, as mentioned above, after the lining limit piece 4 equipped with the limit nut 3 and the adapter terminal 8 is inserted from the horizontal mounting cavity of the metal protective shell 1, the plug terminal can be inserted from the vertical mounting cavity of the metal protective shell 1. The specific process is to align the screw connection part 202 on the jack terminal 201 with the avoidance hole on the adapter terminal 8 through which the screw connection part 202 can pass, and insert it. As the screw connection part 202 passes through the avoidance hole, the screw connection part 202 begins to contact the limit nut 3. At this time, by rotating the jack terminal 201, the screw connection part 202 can be driven to screw into the limit nut 3 until the screw connection part 202 stops when the limit nut 3 is stably threaded. At this time, the jack terminal 201 is stably connected to the limit nut 3, and the adapter terminal 8 is located between the jack terminal 201 and the limit nut 3, which can effectively prevent the limit nut 3 and the jack terminal 201 from being separated from the lining limit piece 4.

[0024] In one embodiment of the present invention, Figure 2-Figure 3 As shown, the telescopic liquid storage assembly includes a first U-shaped connecting frame plate 601 connected to the open end of the liner limiter 4, a second U-shaped connecting frame plate 604 arranged in parallel with the first U-shaped connecting frame plate 601, a first U-shaped corrugated pipe 602 and a second U-shaped corrugated pipe 603 connected between the first U-shaped connecting frame plate 601 and the second U-shaped connecting frame plate 604, a guide support rod 606 connected to the second U-shaped connecting frame plate 604, a hollow slider 607 connected to the other end of the guide support rod 606, and a A sealed liquid storage chamber is formed between the liquid guide hole 6010, the first U-shaped connecting frame plate 601, the first U-shaped corrugated tube 602, the second U-shaped corrugated tube 603 and the second U-shaped connecting frame plate 604. The liquid guide hole 6010 is connected with the sealed liquid storage chamber. A liquid guide channel 605 is provided on the opening end surface of the lining limiter 4. The liquid guide channel 605 is connected with the sealed liquid storage chamber through the liquid guide hole 6010. One end of the guide support rod 606 passes through the liquid guide hole 6010 and extends into the liquid guide channel 605. The hollow slider 607 is slidably connected to the inner wall of the liquid guide channel 605.

[0025] It should be noted that, as mentioned above, as the tail cover 501 is gradually inserted into the metal protective shell 1, the tail cover 501 first contacts the second U-shaped connecting frame plate 604 and continuously pushes it toward the first U-shaped connecting frame plate 601. As the second U-shaped connecting frame plate 604 moves, the volume of the sealed liquid storage chamber formed between the first U-shaped connecting frame plate 601, the first U-shaped bellows 602, the second U-shaped bellows 603 and the second U-shaped connecting frame plate 604 is continuously compressed, and a positive pressure is generated inside the chamber. The positive pressure drives the liquid to flow toward the energy storage switch assembly. Because the energy storage switch assembly has a certain pressure resistance, when the hydraulic pressure reaches the set value, the energy storage switch assembly will open the liquid inlet end of the expansion assembly, so that the expansion assembly can be filled with liquid and expanded.

[0026] In one embodiment of the present invention, Figure 2 and Figure 4 As shown, the energy storage switch assembly includes a spring 608 connected to the inner wall of the liquid conducting channel 605, a piston member 609 connected to the other end of the spring 608, and a first branch channel 610 arranged inside the lining limit member 4. The expansion assembly is connected to the liquid conducting channel 605 through the first branch channel 610, and the piston member 609 is in close contact with the inner wall of the liquid conducting channel 605. When the piston member 609 moves to the first branch channel 610 and the area between the piston member 609 and the first U-shaped connecting frame plate 601 is connected to the first branch channel 610, the piston member 609 is in the first position state.

[0027] It should be noted that, as described above, when the liquid is driven by the positive pressure and flows into the liquid guide channel 605, the liquid begins to push the piston 609 to move toward the spring 608. However, since the spring 608 is deformed by the force, as the hydraulic pressure gradually increases, the spring 608 begins to stably deform and shorten until the piston 609 moves to the first branch channel 610. When the piston 609 no longer blocks the first branch channel 610, the liquid is instantly filled into the expandable bladder 611 under the action of the hydraulic pressure, so that the expandable bladder 611 can quickly Rapid expansion, at this time, the pressure on the spring 608 will instantly drop a certain value, and it will reset part of the distance, but with the continuous movement of the second U-shaped connecting frame plate 604, the piston member 609 can always be subjected to sufficient pressure again, and finally the piston member 609 is in a position where it no longer blocks the first branch channel 610. At this time, the pressures in the sealed liquid storage chamber, the liquid guiding channel 605, the first branch channel 610 and the expandable bladder 611 are the same, and the piston member 609 is in a stable position.

[0028] In one embodiment of the present invention, Figure 2 and Figure 4As shown, the expansion assembly includes an expandable bladder 611 connected to the inner wall of the liner stopper 4 and a connecting terminal connected to the expandable bladder 611 , and the connecting terminal of the expandable bladder 611 is connected to the first branch channel 610 .

[0029] It should be noted that, as mentioned above, when the pressures in the sealed liquid storage chamber, the liquid guiding channel 605, the first branch channel 610 and the expandable bladder 611 are the same, the expandable bladder 611 can expand and deform and stably tighten the inner core of the cable 5 and the adapter terminal 8, so that the inner core of the cable 5 and the adapter terminal 8 can always remain in a stable connection state.

[0030] In one embodiment of the present invention, Figure 2 and Figure 4 As shown, a circulating temperature regulating mechanism 7 is provided on the metal protective housing 1. When the internal air pressure of the expansion assembly and the telescopic liquid storage assembly reaches a set pressure value, the energy storage switch assembly is in the second position state; When the energy storage switch assembly is in the second position, the internal spaces of the circulating temperature regulating mechanism 7, the expansion assembly and the telescopic liquid storage assembly are interconnected.

[0031] The circulating temperature control mechanism 7 includes a circulating circulation component arranged on the inner wall of the metal protective shell 1 and a heat dissipation component connected to the outer wall of the metal protective shell 1. One end of the heat dissipation component penetrates the metal protective shell 1 and extends into the inside of the circulating circulation component.

[0032] The circulating flow component includes a plurality of third branch channels 702 and an annular inner circulation channel 703 provided in the metal protective shell 1, the plurality of third branch channels 702 are all connected to the annular inner circulation channel 703, the lining stopper 4 is provided with a plurality of second branch channels 701 connected to the third branch channels 702, and the third branch channels 702 are connected to the liquid guide channel 605 through the second branch channels 701; The heat dissipation assembly includes a heat sink 704 connected to the outer wall of the metal protective shell 1 and a plurality of heat conducting members 705 connected to the heat sink 704 . The other end of the heat conducting member 705 penetrates the metal protective shell 1 and extends into the annular inner circulation channel 703 .

[0033] It should be noted that, during the process of power-on, the inner core and the adapter terminal 8 will generate heat energy, which will be transferred to the liquid through the expandable bladder 611. The liquid will expand due to heat, which will cause the pressure in the sealed liquid storage chamber, the liquid guiding channel 605, the first branch channel 610 and the expandable bladder 611 to increase again. Excessive pressure may cause the connection between the tail cover 501 and the metal protective shell 1 to be subjected to greater force. Whether it is a snap-on connection or a threaded connection, it will have a certain impact on the connection structure. For example, if the thread is over-extruded for a long time, in order to reduce the impact of heat energy on the connection structure, a circulating temperature control mechanism 7 is added. When the liquid is heated, the liquid When the pressure increases, the piston member 609 will be further squeezed toward the spring 608. As the piston member 609 moves to the second branch channel 701 and the second branch channel 701 is opened, the heated liquid enters the second branch channel 701 under the action of the hydraulic pressure, and flows through the third branch channel 702 and the heat sink 704 in sequence. After the liquid enters the heat sink 704, it begins to contact the heat sink 704, and transfers the heat energy to the heat conductor 705 through the heat sink 704 for heat dissipation, thereby effectively improving the heat dissipation and cooling efficiency of the liquid, and can achieve the effect of reducing the hydraulic pressure, thereby reducing the long-term impact of the excessive hydraulic pressure caused by the heating of the liquid on the connection structure.

[0034] The present embodiment is described above, but the present embodiment is not limited to the above-mentioned specific implementation manner. The above-mentioned specific implementation manner is merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, which are all within the protection of the present embodiment.

Claims

1. A two-core charging device for an electric vehicle, characterized in that: The invention comprises a metal protective shell (1), a transverse mounting cavity and a vertical mounting cavity provided in the metal protective shell (1), a liner stopper (4) inserted in the transverse mounting cavity, a stopper nut (3) and a transfer terminal (8) detachably connected to the liner stopper (4), a plug-in terminal inserted in the vertical mounting cavity, an expansion stopper mechanism (6) connected to the liner stopper (4), a cable (5) inserted in the transverse mounting cavity, and a tail cover (501) connected to the cable (5), wherein the transverse mounting cavity and the vertical mounting cavity are connected, an inner core of one end of the cable (5) contacts the transfer terminal (8), and one end of the plug-in terminal passes through the transfer terminal (8) and is threadedly connected to the stopper nut (3); The expansion type limiting mechanism (6) comprises a telescopic liquid storage component connected to the open end of the lining limiting member (4), an energy storage switch component arranged inside the lining limiting member (4), and an expansion component connected to the inner wall of the lining limiting member (4); When the tail cover (501) is inserted into the metal protective housing (1), pressure is applied to the telescopic liquid storage assembly to cause it to deform; When the telescopic liquid storage component is deformed to a set state, the internal air pressure controls the energy storage switch component to be in a first position state. When the energy storage switch component is in the first position state, the internal space of the telescopic liquid storage component is connected to the internal space of the expansion component. The expansion assembly is used to limit and fix the junction area between the inner core at one end of the cable (5) and the transfer terminal (8).

2. A two-core charging device for an electric vehicle according to claim 1, characterized in that: The plug-in terminal comprises a socket terminal (201), a screw connecting portion (202) connected to the closed end of the socket terminal (201), a limiting rod (203) connected to the screw connecting portion (202), and a rotating spring contact piece (204) connected to the inner wall of the socket terminal (201); one end of the screw connecting portion (202) passes through a transfer terminal (8) and is threadedly connected to a limiting nut (3); and the transfer terminal (8) is located between the limiting nut (3) and the socket terminal (201).

3. A two-core charging device for an electric vehicle according to claim 2, characterized in that: The lining limiter (4) is provided with a limit hole matching the limit nut (3), and the adapter terminal (8) is provided with an avoidance hole for one end of the screw connection part (202) to pass through, and the diameter of the avoidance hole is larger than the diameter of one end of the plug terminal.

4. A two-core charging device for an electric vehicle according to claim 3, characterized in that: The telescopic liquid storage assembly comprises a first U-shaped connecting frame plate (601) connected to the open end of the inner liner stopper (4), a second U-shaped connecting frame plate (604) arranged parallel to the first U-shaped connecting frame plate (601), a first U-shaped corrugated pipe (602) and a second U-shaped corrugated pipe (603) connected between the first U-shaped connecting frame plate (601) and the second U-shaped connecting frame plate (604), a guide support rod (606) connected to the second U-shaped connecting frame plate (604), a hollow slider (607) connected to the other end of the guide support rod (606), and a liquid guide hole (6010) provided on the first U-shaped connecting frame plate (601). ), a sealed liquid storage chamber is formed between the first U-shaped connecting frame plate (601), the first U-shaped corrugated tube (602), the second U-shaped corrugated tube (603) and the second U-shaped connecting frame plate (604); the liquid guide hole (6010) is connected to the sealed liquid storage chamber; a liquid guide channel (605) is provided on the open end surface of the lining limiter (4); the liquid guide channel (605) is connected to the sealed liquid storage chamber through the liquid guide hole (6010); one end of the guide support rod (606) passes through the liquid guide hole (6010) and extends into the liquid guide channel (605); and the hollow slider (607) is slidably connected to the inner wall of the liquid guide channel (605).

5. A two-core charging device for an electric vehicle according to claim 4, characterized in that: The energy storage switch assembly comprises a spring (608) connected to the inner wall of the liquid conducting channel (605), a piston member (609) connected to the other end of the spring (608), and a first branch channel (610) provided inside the lining stop member (4); the expansion assembly is connected to the liquid conducting channel (605) via the first branch channel (610); the piston member (609) is in close contact with the inner wall of the liquid conducting channel (605); when the piston member (609) moves to the first branch channel (610) and the area between the piston member (609) and the first U-shaped connecting frame plate (601) is connected to the first branch channel (610), the piston member (609) is in a first position state.

6. A two-core charging device for an electric vehicle according to claim 5, characterized in that: The expansion assembly comprises an expandable bladder (611) connected to the inner wall of the liner stopper (4) and a connection terminal connected to the expandable bladder (611), and the connection terminal of the expandable bladder (611) is in communication with the first branch channel (610).

7. A two-core charging device for an electric vehicle according to claim 6, characterized in that: The metal protective housing (1) is provided with a circulating temperature regulating mechanism (7), and when the internal air pressure of the expansion component and the telescopic liquid storage component reaches a set pressure value, the energy storage switch component is in a second position state; When the energy storage switch assembly is in the second position state, the internal spaces of the circulating temperature regulating mechanism (7), the expansion assembly and the telescopic liquid storage assembly are interconnected.

8. A two-core charging device for an electric vehicle according to claim 7, characterized in that: The circulating temperature control mechanism (7) comprises a circulating circulation component arranged on the inner wall of the metal protective shell (1) and a heat dissipation component connected to the outer wall of the metal protective shell (1); one end of the heat dissipation component passes through the metal protective shell (1) and extends into the interior of the circulating circulation component.

9. A two-core charging device for an electric vehicle according to claim 8, characterized in that: The circulating flow component comprises a plurality of third branch channels (702) and an annular inner circulation channel (703) arranged in the metal protective shell (1); the plurality of third branch channels (702) are all connected to the annular inner circulation channel (703); the inner lining stopper (4) is provided with a plurality of second branch channels (701) connected to the third branch channels (702); the third branch channels (702) are connected to the liquid guide channel (605) via the second branch channels (701); The heat dissipation assembly comprises a heat sink (704) connected to the outer wall of the metal protective shell (1) and a plurality of heat conducting members (705) connected to the heat sink (704); the other end of the heat conducting member (705) penetrates the metal protective shell (1) and extends into the annular inner circulation channel (703).

10. A method for assembling a two-core charging device for an electric vehicle, characterized in that: A two-core charging device for assembling an electric vehicle as claimed in any one of claims 1 to 9 specifically comprises the following steps: Step 100: sequentially install the limiting nut (3) and the adapter terminal (8) on the lining limiting member (4) and match them with the corresponding limiting grooves on the lining limiting member (4); Step 200: inserting the liner limiter (4) equipped with the limit nut (3) and the adapter terminal (8) from the transverse installation cavity of the metal protective housing (1); Step 300: insert the plug-in terminal from the vertical installation cavity of the metal protective housing (1), and rotate the plug-in terminal until the plug-in terminal is stably connected to the limit nut (3); Step 400: insert the cable (5) into the vertical installation cavity of the metal protective housing (1) until the tail cover (501) on the cable (5) is snap-fitted with the metal protective housing (1).

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