Isolation type water-cooling large-current direct-current charging device and using method of isolation type water-cooling large-current direct-current charging device

Abstract

The invention relates to the technical field of new energy automobiles, in particular to an isolated water-cooling large-current direct-current charging device and a using method of the device, the isolated water-cooling large-current direct-current charging device comprises a charging plug body, the charging plug body comprises a charging shell, the charging shell is made of a high-strength insulating material, one end of the charging shell is provided with a cable inlet, and the other end of the charging shell is provided with a cable outlet; the other end is provided with a plug contact; the interior of the charging housing is provided with an isolation cavity, and the internal space is divided into a water cooling module and an electrical connection region by the isolation cavity. The water cooling module surrounds the two sides of the electrical connection area to form an isolated water cooling structure, and a water cooling device is installed in the water cooling module. A clamping device is arranged at the cable inlet, and a protective cover is arranged at the outlet of the plug contact piece and used for protecting the contact piece; a locking device for locking the charging socket is arranged on the charging shell, the plug adopts an isolated water cooling structure, heat is effectively taken away through the water cooling module, the heat dissipation efficiency is improved, the safety and stability of charging are improved, and the requirement of large-current direct-current charging is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicles, and particularly relates to a use method of an isolated water-cooled large-current direct-current charging device. BACKGROUND

[0002] With the rapid development of the electric vehicle industry, the demand for large-current direct-current charging technology is increasing. Large-current direct-current charging can achieve fast charging, greatly shorten the charging time of electric vehicles, and improve the convenience of use. However, a large amount of heat is generated during the large-current charging process, which will cause serious damage to the charging equipment and electric vehicles if not effectively dissipated.

[0003] Traditional charging plugs have many limitations in terms of heat dissipation. Most ordinary charging plugs use natural cooling or air cooling. During large-current charging, the natural cooling efficiency is low, and it is difficult to quickly remove heat, resulting in a sharp rise in internal temperature of the plug, affecting the performance and life of electrical components, and even causing safety hazards. Although the air cooling method improves the heat dissipation effect to some extent, it requires additional fans and other equipment, increasing the size and cost of the charging plug, and the noise and dust accumulation problems caused by the operation of the fan cannot be ignored.

[0004] At the same time, electrical insulation and safety protection are crucial during large-current transmission. The structural design of traditional charging plugs cannot provide reliable insulation and isolation in a large-current environment. Once insulation failure occurs, it is easy to cause safety accidents such as short circuit and electric shock, threatening personnel and equipment safety.

[0005] In addition, the fixation and protection of the cable also face challenges during large-current charging. The electromagnetic force and heat generated when large current passes through the cable can cause the cable to loosen and wear, affecting the stability and safety of charging. Moreover, the locking mechanism of the charging plug and the charging socket is not stable enough, and may loosen or disconnect during the charging process due to external forces, interrupting the charging process and even damaging the charging equipment.

[0006] Therefore, it is of great practical significance to develop an isolated water-cooled large-current direct-current charging plug with efficient heat dissipation, reliable insulation and isolation, stable cable fixation, and reliable locking function. SUMMARY

[0007] To solve the problems existing in the prior art, the present application provides an isolated water-cooled large-current direct-current charging device. The plug adopts an isolated water-cooled structure, effectively removes heat through a water-cooled module, and improves the heat dissipation efficiency. The charging shell made of high-strength insulating material enhances the insulation performance. The optimized cable clamping device ensures stable cable connection. The unique locking device ensures that the plug and the socket are tightly connected during charging, thereby improving the safety and stability of charging and meeting the demand for large-current direct-current charging.

[0008] In order to achieve the above-mentioned purpose, the application provides an isolated water-cooled large-current DC charging device, which comprises a charging plug body, the charging plug body comprises a charging shell, the charging shell is made of high-strength insulating material, one end of the charging shell is provided with a cable inlet, and the other end is provided with a plug contact; the charging shell is internally provided with an isolation cavity, the isolation cavity divides the internal space into a water-cooled module and an electrical connection area; the water-cooled module is arranged on both sides of the electrical connection area to form an isolated water-cooled structure, and the water-cooled module is internally provided with a water-cooled device; the cable inlet is provided with a clamping device, and the outlet of the plug contact is provided with a protective cover for protecting the contact; and the charging shell is further provided with a locking device for locking with a charging socket.

[0009] As a further improvement of the application, in order to be able to dissipate heat in time through the water-cooled device when the main charging contact is working, ensure the stable operation of the water-cooled device, and improve the working performance and service life of the main charging contact, the isolation cavity adopts a double-wall structure, the inside of the isolation cavity is provided with a charging fixed module, the charging fixed module is provided with a secondary terminal mounting hole on the upper and lower sides, the two sides of the charging fixed module are provided with a main terminal mounting groove, the secondary terminal mounting hole and the main terminal mounting groove are matched with a secondary charging contact and a main charging contact, the main charging contact is matched with the water-cooled device, and the main terminal mounting groove is matched with a ring-shaped bearing plate for bearing and protecting the water-cooled device.

[0010] As a further improvement of the application, in order to realize the independence of the water-cooled device and the cable connection area, prevent the water-cooled liquid from leaking and affecting the cable connection, and improve the reliability and safety of the entire charging plug, the rear end of the main charging contact is provided with a sealing ring, the sealing ring is matched with a partition plate, the partition plate divides the terminal area of the main charging contact into a water-cooled installation module and a cable connection module, the water-cooled device is arranged in the water-cooled installation module, and the cable connection module comprises a cable bundling box.

[0011] As a further improvement of the application, in order to continuously and effectively take away the heat generated in the charging process, further enhance the water-cooling effect, and ensure that the temperature of the charging plug is controlled within a reasonable range when working under large current, the water-cooled device comprises a first liquid cooling box arranged on the other side of the partition plate, a liquid cooling water flow channel is arranged in the first liquid cooling box from top to bottom, a liquid cooling water inlet pipeline and a liquid cooling water conveying pipeline are arranged at the terminal of the liquid cooling box, the liquid cooling water flow channel, the liquid cooling water inlet pipeline and the liquid cooling water conveying pipeline constitute a water-cooling cycle, the liquid cooling water conveying pipeline is further connected with a second liquid cooling box, and one side of the second liquid cooling box is also provided with a cable bundling box.

[0012] As a further improvement of the application, in order to improve the overall structure and stability, reduce the connection gap between the components, reduce the risk of failure caused by loose connection, better fix the cable, increase the friction between the cable and the fixing module, prevent the cable from sliding, ensure the stability of the cable during charging, the clamping device is integrally formed with the charging shell, the clamping device includes a cable fixing module connected with the charging shell and a cable limiting module connected with the cable fixing module, the cable fixing module is arranged in a ring structure, and the cable fixing module is provided with multiple layers of annular protrusions.

[0013] As a further improvement of the application, in order to be able to limit the cable from multiple directions, prevent the cable from moving in horizontal and vertical directions, and improve the reliability of cable fixation, the cable limiting module includes a cable protection shell, the four corners of the cable protection shell are fixedly connected with the cable fixing module through bolts, and the cable protection shell further includes a cable limiting assembly, the cable limiting assembly is composed of two arc-shaped arc limiting units, the upper and lower ends of the arc limiting unit are connected through fixed bolts, the inside of the arc limiting unit is provided with a limiting protrusion, the limiting protrusion is arranged on both sides, and is located on one side of the arc limiting unit and the cable fixing module and the outward side of the arc limiting unit.

[0014] As a further improvement of the application, in order to be able to more accurately control the position of the cable, prevent displacement of the cable caused by shaking during charging, further improve the stability of cable fixation, and at the same time play a guiding role when installing the cable, make the cable more easily enter the limiting position, and at the same time when the cable is subjected to external force, the inclined surface structure can better disperse stress and reduce damage to the cable, a limiting arc plate is arranged between the two limiting protrusions, the limiting protrusions in the arc limiting unit are arranged at the upper and lower middle ends, respectively, a plurality of limiting blocks are arranged on the limiting arc plate and are located on the upper and lower sides of the limiting protrusions and between the two limiting protrusions, and the limiting blocks located on the upper and lower sides of the limiting protrusions are arranged in opposite inclined surface structures.

[0015] As a further improvement of the application, in order to be able to provide stable support and guidance during locking and unlocking, ensure the accurate action of the lock strip, and improve the convenience and reliability of the locking device, the locking device includes a locking protection shell arranged on the upper part of the charging shell and a pressing shell, the pressing shell is connected with a lock strip, the lock strip is connected with the pressing shell through a bolt, a connecting block is arranged below the connection between the pressing shell and the lock strip, a telescopic column is arranged inside the connecting block below the pressing shell, the telescopic column is arranged in cooperation with the lock strip, and a reset spring is arranged at the end of the lock strip.

[0016] As a further improvement of the present application, in order to be able to cut off or turn on the current in time during the locking or unlocking process, avoid the generation of electric arc when the connection is unstable, protect the safety of the operator, and at the same time protect the charging equipment, one side of the lock strip is provided with a linkage block, the lower side of the linkage block is provided with a current interrupter, one side of the top of the current interrupter is provided with a lifting switch, the other side of the current interrupter is provided with a connecting rib plate, the connecting rib plate extends towards one side of the lifting switch, and the lifting switch, the connecting rib plate and the linkage block are cooperatively arranged.

[0017] An advantage of the present application is that: Charging contact and water cooling cooperation: The main charging contact is cooperatively arranged with the water cooling device, and the main terminal installation groove is cooperatively arranged with an annular bearing plate for bearing and protecting the water cooling device. When a large current passes through the main charging contact, a large amount of heat will be generated, and the water cooling device can timely take away the heat to prevent the main charging contact from being damaged or having performance degradation due to overheating. The annular bearing plate ensures the stable installation of the water cooling device, so that it can continuously and effectively play a role, thereby prolonging the service life of the main charging contact and the water cooling device.

[0018] Sealing and separation ensure water cooling and electrical safety: The rear end of the main charging contact is provided with a sealing ring, and a separation plate is cooperatively arranged to divide the end region into a water cooling installation module and a cable connection module. The sealing ring prevents the water cooling liquid from leaking into the cable connection area, avoiding electrical faults such as short circuit caused by liquid leakage. The separation plate further clearly defines the functional division of the two modules, so that the water cooling device and the cable connection do not interfere with each other, ensuring the water cooling effect and electrical safety of the entire charging plug.

[0019] Water cooling circulation system: The water cooling device includes a first liquid cooling box, which is internally provided with a liquid cooling water flow channel and constitutes a water cooling circulation through a liquid cooling water inlet pipeline and a liquid cooling water delivery pipeline. The liquid cooling water continuously flows in the water cooling circulation, can continuously and effectively absorb the heat generated during the charging process, and take the heat out of the charging plug, so as to ensure that the temperature inside the charging plug is always maintained within a reasonable range, and the charging process is stably carried out.

[0020] Second liquid cooling box enhances heat dissipation effect: The liquid cooling water delivery pipeline is also connected with a second liquid cooling box, which further expands the heat dissipation area of the water cooling and enhances the heat dissipation effect. Especially during large current charging, the temperature inside the charging plug can be reduced more quickly and effectively, and the safety and efficiency of the charging are improved. At the same time, the second liquid cooling box is also provided with a cable bundling box, so that the water cooling device and the cable connection module are organically combined, and the overall structure is more compact and reasonable.

[0021] The cable limiting module has multi-level limiting precision fixing: the arc-shaped limiting unit is internally provided with limiting protrusions, and a limiting arc plate is arranged between the two limiting protrusions, and a plurality of limiting blocks are arranged on the limiting arc plate. This multi-level limiting structure can more accurately control the position of the cable, prevent the movement of the cable in the horizontal and vertical directions, and improve the reliability of the cable fixing. At the same time, the limiting blocks on the upper and lower sides of the limiting protrusions are arranged in a relative inclined surface structure, which can guide the installation of the cable, make the cable more easily enter the limiting position, and the inclined surface structure can better disperse the stress and reduce the damage to the cable when the cable is subjected to external force.

[0022] Locking device operation and safety protection: the locking device includes a locking protection shell and a pressing shell, and the pressing shell is connected with a lock strip through bolts, which is simple in structure and convenient to operate. A connecting block is arranged below the connection between the pressing shell and the lock strip, and a telescopic column is arranged inside the connecting block below the pressing shell. The telescopic column is arranged in cooperation with the lock strip, which can provide stable support and guidance during locking and unlocking to ensure the accurate action of the lock strip. A reset spring is arranged at the end of the lock strip, which can automatically reset the lock strip after unlocking, facilitating the next locking operation and improving the convenience of the locking device.

[0023] Linkage and current interruption ensure operation safety: a linkage block is arranged on one side of the lock strip, and a current interrupter is arranged below the linkage block. When the lock strip operates, the current interrupter is driven to work through the linkage block, realizing the current on-off control during the locking and unlocking of the charging plug and the socket. A lifting switch is arranged on one side of the top of the current interrupter, and a connecting rib plate is arranged on the other side. The connecting rib plate extends towards the side of the lifting switch. The lifting switch, the connecting rib plate and the linkage block are arranged in cooperation, which can cut off or connect the current in time during the locking or unlocking process, avoiding the generation of electric arc when the connection is unstable, ensuring the safety of the operator and protecting the charging equipment.

[0024] The application also provides a use method of the isolated water-cooled large-current direct-current charging device, characterized in that the use method comprises the following steps: Step one: open the protective cover at the outlet of the plug contact of the charging plug, carefully align the plug contact of the charging plug with the corresponding interface of the charging socket, and slowly insert to ensure that the plug contact is completely and accurately connected with the socket interface; Step two: operate the locking device, press the pressing shell downward, and the lock strip connected with the pressing shell moves downward. The lock strip is connected with the pressing shell through bolts. During the pressing process, the telescopic column in the connecting block acts in cooperation with the lock strip to ensure the stable descent of the lock strip. Step three: when the lock strip moves to the appropriate position, the reset spring at the end of the lock strip acts to firmly lock the lock strip with the corresponding locking structure on the charging socket, ensuring that the charging plug and the charging socket will not be separated during the charging process. Step four: During the locking process, the linkage block on one side of the locking strip moves; the current interrupter is arranged below the linkage block, when the linkage block moves to a specific position, the lifting switch at the top of the current interrupter is triggered, through the action of the connecting rib plate, the current interrupter is in the normal conduction state, allowing current to pass through the charging circuit for charging operation; Step five: When the charging starts, the water cooling system is started, the cooling liquid enters the liquid cooling water inlet pipeline into the liquid cooling water flow channel of the first liquid cooling box, and the heating components such as the main charging contact are cooled, and the cooling liquid after absorbing heat flows to the second liquid cooling box through the liquid cooling water conveying pipeline, and is further cooled or circulated back to the cooling source in the second liquid cooling box, forming a continuous water cooling cycle, ensuring that the temperature inside the plug is within a safe range during charging; Step six: Under the condition that the locking is firm and the water cooling system is normal, the large current passes through the cable line in the cable connection module, is transmitted to the charging socket through the main charging contact and the secondary charging contact, and direct current charging is performed for the equipment; Step seven: When the charging is completed, first press the lifting switch at the top of the current interrupter, through the action of the connecting rib plate and the linkage block, the current interrupter cuts off the charging circuit and stops the current transmission; Step eight: Press the lower pressing shell downward to overcome the elastic force of the reset spring at the end of the locking strip, so that the locking strip moves upward and releases the locking state with the charging socket; Step nine: Slowly pull out the charging plug from the charging socket, and cover the protective cover at the outlet of the plug contact after pulling out the charging plug to protect the contact from the influence of the external environment.

[0025] Another beneficial effect of the present application is: Precise docking guarantee: In step one, it is clearly required to carefully align the plug contact of the charging plug with the corresponding interface of the charging socket and slowly insert it to ensure complete and accurate docking. This precise docking operation effectively avoids electric sparks caused by poor contact, greatly reduces the risk of electrical fire caused by contact problems, and ensures the safety of the operator and the equipment.

[0026] Reliable locking mechanism: Steps two to three operate the locking device, and the lower pressing shell, the locking strip, the reset spring and other components cooperate to firmly lock the charging plug and the charging socket. This reliable locking structure ensures that the charging plug will not be accidentally separated due to external force during charging, preventing the risk of electric shock caused by plug falling off, and providing stable safety protection for the charging process.

[0027] Current blocking protection: Steps four and seven set up the current blocking device and its triggering mechanism. During the locking process, the linkage block moves to trigger the current blocking device to be in the normal conduction state; after the charging is completed, the lifting switch is pressed to cut off the charging circuit. This design enables precise control of the on-off of the current, and when the charging is completed or an abnormal situation occurs, the current can be quickly cut off to avoid safety accidents caused by continuous current flow.

[0028] Efficient water-cooled heat dissipation: Step five describes the operation process of the water-cooling system in detail. The cooling liquid enters from the liquid cooling water inlet pipeline, flows through the first liquid cooling box and the second liquid cooling box in turn, cools the heating components such as the main charging contact, and forms a continuous water-cooling cycle. This efficient heat dissipation method can timely remove the heat generated during charging, effectively reduce the internal temperature of the plug, prevent the charging efficiency from being reduced and the equipment from being damaged due to overheating, and ensure the stability and efficiency of the large-current direct-current charging.

[0029] Stable current transmission: Step six points out that under the condition that the locking is firm and the water-cooling system is normally running, the large current can be stably transmitted to the charging socket through the cable line in the cable connection module, through the main charging contact and the secondary charging contact. Reliable locking structure and water-cooling system provide a stable physical environment and suitable temperature conditions for current transmission, reduce interference and loss in the current transmission process, and ensure the smooth progress of the charging process.

[0030] When the charging plug is in operation, the protective cover at the outlet of the plug contact is opened, the charging plug is held by hand, the plug contact is carefully aligned with the corresponding interface of the charging socket, and the plug contact is inserted slowly and smoothly to ensure that the plug contact and the socket interface are completely and accurately connected, and to avoid poor contact or damage to the components due to inaccurate connection. The lower pressing shell is pressed downward by hand, and the connected locking strip is moved downward synchronously. The locking strip is connected to the lower pressing shell by a bolt, and in the pressing process, the extension column in the connecting block cooperates with the locking strip to ensure that the locking strip descends smoothly and prevents jamming or deviation.

[0031] When the locking strip moves to the appropriate position, the reset spring at the end of the locking strip starts to work, and the spring force makes the locking strip firmly locked with the corresponding locking structure on the charging socket, ensuring that the charging plug and the charging socket will not be separated due to external force during the charging process, and ensuring the safety and stability of the charging process. During the locking process, the linkage block on one side of the locking strip moves with the movement of the locking strip. The linkage block is provided below the locking strip, and when the linkage block moves to a specific position, it triggers the lifting switch at the top of the current blocking device, and through the action of the connecting rib plate, the current blocking device is in the normal conduction state, allowing the current to pass through the charging circuit and preparing for subsequent charging operation.

[0032] When the charging starts, the water cooling system is started. The cooling liquid enters the liquid cooling water flow channel of the first liquid cooling box from the liquid cooling water inlet pipeline, cools the heat generating components such as the main charging contact, and the cooling liquid after absorbing heat flows to the second liquid cooling box through the liquid cooling water delivery pipeline, is further cooled or circulated back to the cooling source in the second liquid cooling box, forms a continuous water cooling cycle, effectively reduces the internal temperature of the plug, and ensures that the internal temperature of the plug is always within a safe range during the charging process. In the case of firm locking and normal operation of the water cooling system, a large current passes through the cable line in the cable connection module, is transmitted to the charging socket through the main charging contact and the secondary charging contact, and direct current charging is performed on the equipment. After the charging is completed, the lifting switch at the top of the current breaker is pressed down first, the current breaker cuts off the charging circuit through the action of the connecting rib plate and the linkage block, the current transmission is stopped, and the operation safety is ensured.

[0033] The lower shell is pressed downward again, the locking strip is moved upward against the elastic force of the reset spring at the end of the locking strip, and the locking state with the charging socket is released. The charging plug is slowly pulled out of the charging socket, and the protective cover at the outlet of the plug contact is covered in time after being pulled out, so that the contact is protected from the influence of the external environment and the service life of the plug is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to facilitate the understanding of those skilled in the art, the present application will be further described below in conjunction with the drawings: Figure 1 The structure diagram of the present application.

[0035] Figure 2 The internal structure diagram of the present application.

[0036] Figure 3 The internal structure side view of the present application.

[0037] Figure 4 The structure diagram of the charging fixing module.

[0038] Figure 5 The side view structure diagram of the charging fixing module.

[0039] Figure 6 The structure diagram of the main terminal installation groove.

[0040] Figure 7 The connection structure diagram of the charging fixing module and the cable.

[0041] Figure 8 The structure diagram of the first liquid cooling box.

[0042] Figure 9 The structure diagram of the clamping device.

[0043] Figure 10 The structure diagram of the cable fixing module.

[0044] Figure 11 The structure diagram of the cable limiting module.

[0045] Figure 12 The structure diagram of the locking device.

[0046] Figure 13 The internal structure diagram of the locking device.

[0047] Wherein, 1 charging shell, 2 cable inlet, 3 plug contact, 4 isolation cavity, 5 water cooling module, 6 electrical connection area, 7 water cooling device, 8 clamping device, 9 locking device, 10 charging fixed module, 11 secondary terminal mounting hole, 12 main terminal mounting groove, 13 secondary charging contact, 14 main charging contact, 15 annular bearing plate, 16 sealing ring, 17 partition plate, 18 water cooling installation module, 19 cable connection module, 20 cable cable tie box, 21 first liquid cooling box, 22 liquid cooling water flow channel, 23 liquid cooling water inlet pipeline, 24 liquid cooling water conveying pipeline, 25 second liquid cooling box, 26 cable fixing module, 27 cable limiting module, 28 annular protrusion, 29 cable protection shell, 30 cable limiting assembly, 31 arc limiting unit, 32 limiting protrusion, 33 limiting arc plate, 34 limiting block, 35 locking protection shell, 36 pressing shell, 37 lock strip, 38 connecting block, 39 telescopic column, 40 reset spring, 41 linkage block, 42 current breaker, 43 lifting switch, 44 connecting rib plate. DETAILED DESCRIPTION

[0048] In order to make the person skilled in the art better understand the technical scheme in the present application, the following will combine the attached drawings to Figures 1-13 Further description of the present application, the following examples are only used to more clearly illustrate the technical scheme of the present application, and cannot limit the protection scope of the present application.

[0049] As Figures 1-13 shown in a kind of isolated water-cooled large current DC charging device, including charging plug body, the charging plug body includes charging shell 1, the charging shell 1 is made of high-strength insulating material, one end of the charging shell 1 is equipped with cable inlet 2, the other end is equipped with plug contact 3;Charging shell 1 inside is equipped with isolation cavity 4, isolation cavity 4 will internal space be divided into water cooling module 5 and electrical connection area 6;Water cooling module 5 is around on both sides of electrical connection area 6, forms isolated water-cooled structure, water cooling module 5 is installed with water cooling device 7;Cable inlet 2 is equipped with clamping device 8, plug contact 3 outlet is equipped with protective cover, for protecting contact piece;Charging shell 1 is also equipped with locking device 9 for being locked with charging socket.

[0050] The isolation cavity 4 adopts a double-wall structure, the inside of the isolation cavity 4 is provided with a charging fixed module 10, the upper and lower sides of the charging fixed module 10 are provided with a secondary terminal mounting hole 11, the two sides of the charging fixed module 10 are provided with a main terminal mounting groove 12, the secondary terminal mounting hole 11 and the main terminal mounting groove 12 are matched with a secondary charging contact 13 and a main charging contact 14, the main charging contact 14 is matched with a water cooling device 7, the main terminal mounting groove 12 is matched with an annular bearing plate 15 for bearing and protecting the water cooling device 7.

[0051] The rear end of the main charging contact 14 is provided with a sealing ring 16, the sealing ring 16 is matched with a partition plate 17, the partition plate 17 divides the end region of the main charging contact 14 into a water cooling installation module 18 and a cable connection module 19, the water cooling device 7 is arranged in the water cooling installation module 18, the cable connection module 19 includes a cable bundling box 20, and the cable connection module 19 connects the main charging contact 14 with a plurality of cable lines.

[0052] The water cooling device 7 includes a first liquid cooling box 21 arranged on the other side of the partition plate 17, a liquid cooling water channel 22 is arranged in the first liquid cooling box 21 from top to bottom, a liquid cooling water inlet pipe 23 and a liquid cooling water delivery pipe 24 are arranged at the end of the liquid cooling box, the liquid cooling water channel 22, the liquid cooling water inlet pipe 23 and the liquid cooling water delivery pipe 24 constitute a water cooling cycle, the liquid cooling water delivery pipe 24 is further connected with a second liquid cooling box 25, and one side of the second liquid cooling box 25 is also provided with a cable bundling box 20.

[0053] The clamping device 8 is integrally formed with the charging shell 1, the clamping device 8 includes a cable fixing module 26 connected with the charging shell 1 and a cable limiting module 27 connected with the cable fixing module 26, the cable fixing module 26 is arranged in a ring structure, and a plurality of layers of annular protrusions 28 are arranged in the cable fixing module 26.

[0054] The cable limiting module 27 includes a cable protection shell 29, four corners of the cable protection shell 29 are fixedly connected with the cable fixing module 26 through bolts, the cable protection shell 29 further includes a cable limiting assembly 30, the cable limiting assembly 30 is composed of two arc-shaped arc limiting units 31, the upper and lower ends of the arc limiting unit 31 are connected through fixed bolts, a limiting protrusion 32 is arranged in the arc limiting unit 31, the limiting protrusions 32 are arranged on the two sides, and are located on one side of the arc limiting unit 31 and the cable fixing module 26 and the side of the arc limiting unit 31 facing outward.

[0055] The limiting protrusions 32 in the arc-shaped limiting unit 31 are respectively arranged at the upper middle and lower middle ends, and a plurality of limiting blocks 34 are arranged on the limiting arc plate 33, which are respectively located on the upper and lower sides of the limiting protrusions 32 and between the two limiting protrusions 32. The limiting blocks 34 on the upper and lower sides of the limiting protrusions 32 are arranged in opposite inclined surface structures.

[0056] The locking device 9 includes a locking protection shell 35 arranged on the upper part of the charging shell 1 and a pressing shell 36. The pressing shell 36 is connected with a lock strip 37. The lock strip 37 is connected with the pressing shell 36 through a bolt. A connecting block 38 is arranged below the connection position of the pressing shell 36 and the lock strip 37. A telescopic column 39 is arranged inside the connecting block 38 below the pressing shell 36. The telescopic column 39 is arranged in cooperation with the lock strip 37. A reset spring 40 is arranged at the end of the lock strip 37.

[0057] One side of the lock strip 37 is provided with a linkage block 41. A current interrupter 42 is arranged below the linkage block 41. A lifting switch 43 is arranged at one side of the top of the current interrupter 42. A connecting rib plate 44 is arranged at the other side of the current interrupter 42. The connecting rib plate 44 extends to one side of the lifting switch 43. The lifting switch 43, the connecting rib plate 44 and the linkage block 41 are arranged in cooperation.

[0058] A use method of the isolated water-cooled large-current direct-current charging device, the use method comprising the following steps: Step one: open the protective cover at the outlet of the plug contact 3 of the charging plug, carefully align the plug contact 3 of the charging plug with the corresponding interface of the charging socket, and slowly insert to ensure that the plug contact 3 is completely and accurately connected with the socket interface; Step two: operate the locking device 9, press the pressing shell 36 downward, and the lock strip 37 connected with the pressing shell 36 moves downward. The lock strip 37 is connected with the pressing shell 36 through a bolt. During the pressing process, the telescopic column 39 in the connecting block 38 acts in cooperation with the lock strip 37 to ensure that the lock strip 37 stably descends; Step three: when the lock strip 37 moves to the appropriate position, the reset spring 40 at the end of the lock strip 37 acts to firmly lock the lock strip 37 with the corresponding locking structure on the charging socket, so as to ensure that the charging plug and the charging socket will not be separated during the charging process; Step four: during the locking process, the linkage block 41 arranged on one side of the lock strip 37 moves. The current interrupter 42 is arranged below the linkage block 41. When the linkage block 41 moves to a specific position, the lifting switch 43 at the top of the current interrupter 42 is triggered. Through the action of the connecting rib plate 44, the current interrupter 42 is in a normal conduction state, allowing the current to pass through the charging circuit for charging operation. Step five: when the charging starts, the water cooling system is started, the cooling liquid enters the liquid cooling water flow channel 22 of the first liquid cooling box 21 from the liquid cooling water inlet pipeline 23, and the heat generated by the main charging contact 14 and other heat generating components is absorbed, and the cooling liquid flows to the second liquid cooling box 25 through the liquid cooling water conveying pipeline 24, and is further cooled or circulated back to the cooling source in the second liquid cooling box 25, so that a continuous water cooling cycle is formed, and the temperature inside the plug is ensured to be within a safe range during the charging process; Step six: under the condition that the locking is firm and the water cooling system is normally operated, a large current passes through the cable line in the cable connection module 19, is transmitted to the charging socket through the main charging contact 14 and the secondary charging contact 13, and direct current charging is performed on the equipment; Step seven: when the charging is completed, the lifting switch 43 at the top of the current breaker 42 is pressed first, the current breaker 42 is cut off through the action of the connecting rib plate 44 and the linkage block 41, and the current transmission is stopped; Step eight: the lower pressing shell 36 is pressed downward, the locking strip 37 is moved upward against the elastic force of the reset spring 40 at the end of the locking strip 37, and the locking state with the charging socket is released; Step nine: the charging plug is slowly pulled out of the charging socket, and after the charging plug is pulled out, the protective cover at the outlet of the plug contact 3 is covered in time to protect the contact from the influence of the external environment.

[0059] When the charging plug is used, the protective cover at the outlet of the plug contact 3 is opened, the charging plug is held by hand, the plug contact 3 is carefully aligned with the corresponding interface of the charging socket, and the plug contact 3 is inserted in a slow and smooth manner to ensure that the plug contact 3 is completely and accurately connected with the socket interface, so that poor contact or damaged components caused by inaccurate connection are avoided. The lower pressing shell 36 is pressed downward by hand, and the connected locking strip 37 is moved downward synchronously. The locking strip 37 is connected with the lower pressing shell 36 through a bolt, and in the pressing process, the extension column 39 in the connecting block 38 cooperates with the locking strip 37 to ensure that the locking strip 37 descends stably and prevents jamming or deviation.

[0060] When the locking strip 37 moves to the appropriate position, the reset spring 40 at the end of the locking strip 37 starts to work, the locking strip 37 is firmly locked with the corresponding locking structure on the charging socket by the elastic force of the spring, and the charging plug and the charging socket are prevented from being separated due to external force during the charging process, so that the safety and stability of the charging process are ensured. During the locking process, the linkage block 41 on one side of the locking strip 37 moves with the locking strip 37. The current breaker 42 is arranged below the linkage block 41, and when the linkage block 41 moves to a specific position, the lifting switch 43 at the top of the current breaker 42 is triggered, the current breaker 42 is in a normal conduction state through the action of the connecting rib plate 44, and the current is allowed to pass through the charging circuit, so that the subsequent charging operation is prepared.

[0061] When the charging starts, the water cooling system is started. The cooling liquid enters the liquid cooling water inlet pipeline 23 into the liquid cooling water flow channel 22 of the first liquid cooling box 21, and cools the heat generating components such as the main charging contact 14, and the cooling liquid after absorbing heat flows to the second liquid cooling box 25 through the liquid cooling water conveying pipeline 24, and is further cooled or circulated back to the cooling source in the second liquid cooling box 25, forming a continuous water cooling cycle, effectively reducing the internal temperature of the plug, and ensuring that the internal temperature of the plug is always within a safe range during the charging process. In the case of firm locking and normal operation of the water cooling system, a large current passes through the cable line in the cable connection module 19, is transmitted to the charging socket through the main charging contact 14 and the secondary charging contact 13, and direct current charging is performed on the equipment. After the charging is completed, the lifting switch 43 at the top of the current breaker 42 is pressed down first, the current breaker 42 is cut off through the action of the connecting rib plate 44 and the linkage block 41, the current transmission is stopped, and the operation safety is ensured.

[0062] The lower shell 36 is pressed downward again, the locking strip 37 is moved upward to overcome the elastic force of the reset spring 40 at the end of the locking strip 37, and the locking state with the charging socket is released. The charging plug is slowly pulled out of the charging socket, and the protective cover at the outlet of the plug contact 3 is covered in time after being pulled out, so that the contact is protected from the external environment and the service life of the plug is prolonged.

[0063] The application is not limited to the above-mentioned embodiments, and on the basis of the technical solutions disclosed in the application, some technical features can be replaced and deformed by those skilled in the art without creative labor according to the disclosed technical content, and these replacements and deformations are within the protection scope of the application.

Claims

1. An isolated water-cooled high-current DC charging device, comprising a charging plug body, characterized in that: The charging plug body comprises a charging shell (1), the charging shell (1) being made of a high-strength insulating material, a cable inlet (2) being provided at one end of the charging shell (1), and a plug contact (3) being provided at the other end; an isolation cavity (4) being provided inside the charging shell (1), the isolation cavity (4) dividing the internal space into a water cooling module (5) and an electrical connection area (6); the water cooling module (5) surrounding both sides of the electrical connection area (6) to form an isolated water cooling structure, a water cooling device (7) being installed inside the water cooling module (5); a clamping device (8) being provided at the cable inlet (2), and a protective cover being provided at the outlet of the plug contact (3) for protecting the contact; and a locking device (9) for locking with the charging socket being further provided on the charging shell (1).

2. The isolated water-cooled high-current DC charging device according to claim 1, characterized in that: The isolation cavity (4) adopts a double-wall structure, and a charging fixing module (10) is provided inside the isolation cavity (4). Secondary terminal mounting holes (11) are provided on the upper and lower sides of the charging fixing module (10), and main terminal mounting grooves (12) are provided on both sides of the charging fixing module (10). Secondary charging contacts (13) and main charging contacts (14) are provided in conjunction with the secondary terminal mounting holes (11) and the main terminal mounting grooves (12). The main charging contacts (14) are provided in conjunction with the water cooling device (7), and the main terminal mounting grooves (12) are provided in conjunction with an annular bearing plate (15) for supporting and protecting the water cooling device (7).

3. The isolated water-cooled high-current DC charging device according to claim 1, characterized in that: A sealing ring (16) is provided at the rear end of the main charging contact (14), and a partition plate (17) is provided in conjunction with the sealing ring (16). The partition plate (17) divides the end area of ​​the main charging contact (14) into a water-cooling installation module (18) and a cable connection module (19). The water-cooling device (7) is provided inside the water-cooling installation module (18). The cable connection module (19) includes a cable harness box (20). The cable connection module (19) connects the main charging contact (14) to a plurality of cables.

4. The isolated water-cooled high-current DC charging device according to claim 3, characterized in that: The water cooling device (7) includes a first liquid cooling box (21) arranged on the other side of the partition plate (17), a liquid cooling water flow channel (22) is arranged from top to bottom inside the first liquid cooling box (21), a liquid cooling water inlet pipeline (23) and a liquid cooling water delivery pipeline (24) are arranged at the end of the liquid cooling box, the liquid cooling water flow channel (22) and the liquid cooling water inlet pipeline (23) and the liquid cooling water delivery pipeline (24) form a water cooling cycle, the liquid cooling water delivery pipeline (24) is also connected to a second liquid cooling box (25), and a cable harness box (20) is also arranged on one side of the second liquid cooling box (25).

5. The isolated water-cooled high-current DC charging device according to claim 1, characterized in that: The clamping device (8) is integrally formed with the charging housing (1), and the clamping device (8) comprises a cable fixing module (26) connected to the charging housing (1) and a cable limiting module (27) connected to the cable fixing module (26). The cable fixing module (26) is arranged in an annular structure, and a plurality of layers of annular protrusions (28) are arranged inside the cable fixing module (26).

6. The isolated water-cooled high-current DC charging device according to claim 5, characterized in that: The cable limiting module (27) includes a cable protection shell (29), the four corners of which are fixedly connected to the cable fixing module (26) by bolts. The cable protection shell (29) also includes a cable limiting assembly (30), which is composed of two arc-shaped arc limiting units (31). The upper and lower ends of the arc limiting units (31) are connected by fixing bolts. A limiting protrusion (32) is provided inside the arc limiting unit (31), and the limiting protrusion (32) is provided on both sides, located on one side of the arc limiting unit (31) and the cable fixing module (26) and on the side of the arc limiting unit (31) facing outward.

7. The isolated water-cooled high-current DC charging device according to claim 6, characterized in that: A limiting arc plate (33) is provided between the limiting protrusions (32) on both sides. The limiting protrusions (32) in the arc-shaped limiting unit (31) are respectively provided at the middle upper and middle lower ends. A plurality of groups of limiting blocks (34) are provided on the limiting arc plate (33), which are respectively located on the upper and lower sides of the limiting protrusion (32) and between the two groups of limiting protrusions (32). The limiting blocks (34) located on the upper and lower sides of the limiting protrusion (32) are provided in a relative inclined surface structure.

8. The isolated water-cooled high-current DC charging device according to claim 1, characterized in that: The locking device (9) includes a locking protection shell (35) and a downward pressing shell (36) arranged on the upper part of the charging shell (1); the downward pressing shell (36) is connected to a locking strip (37); the locking strip (37) is connected to the downward pressing shell (36) by bolts; a connecting block (38) is provided below the connection between the downward pressing shell (36) and the locking strip (37); a telescopic column (39) is provided inside the connecting block (38) below the downward pressing shell (36); the telescopic column (39) is provided in cooperation with the locking strip (37); a return spring (40) is provided at the end of the locking strip (37).

9. The isolated water-cooled high-current DC charging device according to claim 8, characterized in that: A linkage block (41) is provided on one side of the locking strip (37), a current blocker (42) is provided below the linkage block (41), a lifting switch (43) is provided on one side of the top of the current blocker (42), and a connecting rib plate (44) is provided on the other side of the current blocker (42), the connecting rib plate (44) extends toward one side of the lifting switch (43), and the lifting switch (43), the connecting rib plate (44) and the linkage block (41) are arranged in coordination.

10. A method for using an isolated water-cooled high-current DC charging device, characterized in that: The method of use comprises the following steps: Step 1: Open the protective cover at the outlet of the charging plug contact (3), carefully align the charging plug contact (3) with the corresponding interface of the charging socket, and slowly insert it to ensure that the plug contact (3) is completely and accurately connected with the socket interface; Step 2: Operate the locking device (9) to press the pressing housing (36) downward, and the locking strip (37) connected to the pressing housing (36) moves downward accordingly. The locking strip (37) is connected to the pressing housing (36) by bolts. During the pressing process, the telescopic column (39) inside the connecting block (38) cooperates with the locking strip (37) to ensure that the locking strip (37) descends smoothly. Step 3: When the locking strip (37) moves to a suitable position, the return spring (40) at the end of the locking strip (37) takes effect, so that the locking strip (37) is firmly locked with the corresponding locking structure on the charging socket, ensuring that the charging plug and the charging socket will not separate during the charging process; Step 4: During the locking process, the linkage block (41) provided on one side of the lock bar (37) moves accordingly; a current breaker (42) is provided below the linkage block (41); when the linkage block (41) moves to a specific position, the lifting switch (43) on the top of the current breaker (42) is triggered, and the current breaker (42) is placed in a normal conducting state through the action of the connecting rib (44), allowing current to pass through the charging circuit for charging operation; Step 5: When charging starts, the water cooling system is started, and the coolant enters the liquid cooling water flow channel (22) of the first liquid cooling box (21) from the liquid cooling water inlet pipe (23) to cool the main charging contact (14) and other heat-generating components. The coolant after absorbing heat flows to the second liquid cooling box (25) through the liquid cooling water delivery pipe (24), where it further dissipates heat or circulates back to the cooling source, forming a continuous water cooling cycle to ensure that the temperature inside the plug is within a safe range during the charging process; Step 6: When the lock is secure and the water cooling system is operating normally, a large current is transmitted through the cable in the cable connection module (19) and transmitted to the charging socket via the primary charging contact (14) and the secondary charging contact (13) to perform DC charging for the device; Step 7: When charging is completed, first press the lifting switch (43) on the top of the current breaker (42), and through the action of the connecting rib plate (44) and the linkage block (41), the current breaker (42) cuts off the charging circuit and stops the current transmission; Step 8: Press the pressing shell (36) downward to overcome the elastic force of the return spring (40) at the end of the locking strip (37), so that the locking strip (37) moves upward to release the locking state with the charging socket; Step 9: Slowly pull out the charging plug from the charging socket. After pulling out the charging plug, promptly cover the protective cover at the outlet of the plug contact (3) to protect the contact from the external environment.

Images