Photovoltaic energy storage power station transmission cable connecting device

Abstract

The invention discloses a photovoltaic energy storage power station transmission cable connecting device, and relates to the technical field of cable connection, the photovoltaic energy storage power station transmission cable connecting device comprises a connecting end and an inserting end, and one end of the inserting end is provided with a connecting mechanism; the connecting mechanism comprises a locking shell, a locking piece, a heat dissipation shell, a linkage piece and a cable plug connector, the locking piece is arranged in the locking shell and used for being installed with the connecting end in a matched and inserted mode, the cable plug connector is connected with the interior of the locking piece in a sleeved mode, when the inserting end and the connecting end are in physical butt joint, reliable electrical connection is achieved, and the heat dissipation effect is good. With cable connection, synchronous starting, no need of extra energy and high-efficiency heat dissipation circulation directly acting on a heat source, a heat transfer cavity which is originally mainly composed of air is instantly filled with a high-heat-conduction liquid working medium, sufficient heat exchange is carried out between the heat transfer cavity and the outer surface of a cable plug connector, heat on the cable plug connector is rapidly absorbed, and the service life of the cable plug connector is prolonged. An efficient heat transfer closed loop is completed, and the risk of initial overheating caused by contact resistance and the like is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of cable connection technology, and in particular to a cable connection device for photovoltaic energy storage power stations. Background Technology

[0002] In photovoltaic energy storage power stations, transmission cable connection devices are one of the key components ensuring the reliability of power transmission, and are widely used for connections between cables, switchgear, and transformers. Since photovoltaic power stations are often located outdoors, cable connection devices must withstand complex conditions such as prolonged exposure to sunlight, rain, temperature variations, and mechanical vibration. Their performance stability directly affects the overall operating efficiency and safety of the power station. Current cable connection device designs generally focus on achieving robust mechanical connections and environmentally sound sealing. For example, most connectors employ multi-level locking, threaded tightening, or composite claw structures to ensure the connection remains stable under external forces such as vibration and tension; simultaneously, multi-layered sealing rings and enclosed shells are used to achieve dust and water resistance.

[0003] However, the internal structure of connectors is becoming increasingly complex, often forming a multi-layered enclosed structure consisting of a locking shell, insulating bushing, sealing ring, and other components. While this compact and enclosed layout achieves good results in terms of mechanical locking and sealing, it sacrifices the heat dissipation performance of the connection points. Joule heat generated at the conductor contact points during current transmission is trapped by the dense mechanical structure and sealing materials, making it difficult for the heat to dissipate quickly and effectively. The continuous accumulation of heat inside the connector, especially under high current or high-temperature conditions, accelerates the thermal aging of the insulating material, leading to a decline in insulation performance and posing a risk of breakdown and short circuit. Summary of the Invention

[0004] The purpose of this invention is to provide a photovoltaic energy storage power station transmission cable connection device. When the plug-in end and the connection end are physically connected, a reliable electrical connection is achieved. The locking component and the locking component on the connection end perform a locking action. Along with the cable connection, a highly efficient heat dissipation cycle is simultaneously activated, requiring no additional energy and directly acting on the heat source. This causes the original air-dominated heat transfer cavity to be instantly filled with a highly thermally conductive liquid working fluid, which undergoes sufficient heat exchange with the outer surface of the cable plug-in, rapidly absorbing the heat. The carried heat is then dissipated into the surrounding environment through the large outer surface area of ​​the heat dissipation shell. The heat dissipation holes on the outer wall of the heat dissipation shell are used for gas flow to carry away the conducted heat, completing a highly efficient heat transfer closed loop. This greatly reduces the risk of initial overheating due to contact resistance and other factors.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a photovoltaic energy storage power station transmission cable connection device, comprising a connection end and a mating end, wherein a connection mechanism is provided at one end of the mating end; The connecting mechanism includes a locking housing, a locking component, a heat dissipation housing, a linkage component, and a cable plug. The locking component is disposed inside the locking housing and is used to be fitted and installed with the connecting end. The cable plug is sleeved inside the locking component. The heat dissipation housing is sleeved outside the locking housing, and a heat dissipation cavity is formed between the heat dissipation housing and the locking housing. A heat transfer cavity is formed between the locking housing and the cable plug. A sealing plate is movably disposed inside the heat dissipation cavity, which divides the heat dissipation cavity into two isolated cavities, a and b. Cavity b is filled with coolant and is interconnected with the heat transfer cavity through a flow channel. The locking housing is also provided with a linkage component, which is connected to the locking component. A locking component is installed on the connecting end, which is matched and locked with the locking component. When the insertion end and the connection end are inserted, the locking member and the snap-fit ​​member perform a locking action, and drive the sealing plate to move in the heat dissipation cavity through the linkage member, so as to squeeze the coolant in the cavity b and inject it into the heat transfer cavity for heat conduction and exchange.

[0006] Furthermore, the locking component includes an engagement groove, a moving groove, a locking block, and a return spring. The engagement groove is formed inside the locking housing, and two moving grooves are symmetrically formed on the inner wall of the engagement groove. Each moving groove is provided with a locking block, and the tail end of the locking block is connected to the groove wall of the moving groove through the return spring.

[0007] Furthermore, the engaging component includes a connecting rod, a fixed semi-circular seat, a first conical seat, a second conical seat, and a connecting hole. The connecting rod has a connecting hole inside. One end of the connecting rod is fixedly sleeved with the fixed semi-circular seat. The first conical seat is movably sleeved on the connecting rod with its conical end close to the fixed semi-circular seat. The second conical seat is movably sleeved on the connecting rod and is symmetrically arranged with the first conical seat.

[0008] Furthermore, one end of the locking block has an inclined surface that movably fits against the outer end faces of the fixed semi-arc seat, the first conical seat, and the second conical seat.

[0009] Furthermore, the linkage component includes a linkage rod, a drive rack, a linkage gear, a drive screw, and a moving plate. One end of the linkage rod is connected to the tail end of the locking block. A drive rack is provided on the outer wall of the linkage rod. The linkage gear is sleeved on the drive screw, and one end of the drive screw is fixed to one end of the heat dissipation shell.

[0010] Furthermore, the movable plate is respectively sleeved on the drive screw and the linkage rod, and one end of the movable plate is connected to the sealing plate.

[0011] Furthermore, the cable connector includes an inner ring, a connecting ring, a plug, and a spring. One end of the inner ring is connected to the locking housing, and a heat transfer fin is provided through the inner ring. One end of the heat transfer fin is connected to the outer wall of the connecting ring, and the other end of the heat transfer fin is located in the heat transfer cavity. The connecting ring is coaxially arranged inside the inner ring, and the plug is installed inside the connecting ring through the spring.

[0012] Furthermore, the heat transfer fins are provided in a plurality of units, which are arranged in a ring on the inner connecting ring.

[0013] Furthermore, one end of the connecting end is provided with a connecting groove for insertion and connection with the plug, and an outer cover ring is sleeved on the outer wall of the connecting end.

[0014] Furthermore, a sealing groove is provided inside the outer cover ring, and an abutment ring that inserts into the sealing groove is connected to one end of the locking outer shell. The abutment ring and the sealing groove are connected by a spring.

[0015] The technical effects and advantages of this invention are as follows: This invention achieves a reliable electrical connection when the plug-in end and the connecting end are physically connected. The locking component and the locking element on the connecting end perform a locking action, and the linkage component synchronously converts this into the driving force to start the heat dissipation system. After sensing the locking displacement or torque of the locking component, the linkage component drives the sealing plate to move within the heat dissipation cavity. This movement directly applies pressure to the sealed cavity b filled with coolant, precisely delivering the coolant stored therein through the flow channel to the heat transfer cavity surrounding the cable plug-in. The cable plug-in is the core area for current transmission and heat generation, and its temperature begins to rise the instant energized. The injection of coolant... This process instantly fills the air-based heat transfer cavity with a highly thermally conductive liquid working fluid, allowing for thorough heat exchange with the outer surface of the cable connector. It rapidly absorbs the heat from the connector and dissipates the heat carried by the connector through the large surface area of ​​the heat dissipation shell into the surrounding environment. The heat dissipation holes on the outer wall of the heat dissipation shell facilitate gas flow and carry away the conducted heat, completing an efficient heat transfer loop. Each successful cable connection is accompanied by a synchronously initiated, highly efficient heat dissipation cycle that requires no additional energy and directly acts on the heat source, greatly reducing the risk of initial overheating due to contact resistance and other factors. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a half-sectional view of the overall structure of the present invention; Figure 3 This is a half-sectional view of the disassembled structure of the connecting end and the mating end of the present invention; Figure 4 This is a half-sectional view of the connection mechanism structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A; Figure 6 This is a half-sectional view of the cable connector structure of the present invention; Figure 7 This is a half-sectional view of the locking housing structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point B.

[0017] In the picture: 1. Connecting end; 11. Outer cover ring; 2. Insertion end; 3. Connecting mechanism; 31. Locking housing; 311. Sealing plate; 312. Abutment ring; 32. Locking component; 321. Insertion groove; 322. Moving groove; 323. Locking block; 324. Return spring; 33. Heat dissipation housing; 34. Linkage component; 341. Linkage rod; 342. Drive rack; 343. Linkage gear; 344. Drive screw; 345. Moving plate; 35. Cable connector; 351. Inner ring; 3511. Heat transfer fins; 352. Connecting ring; 353. Plug; 354. Spring component; 4. Clamping component; 41. Connecting rod; 42. Fixed semi-circular seat; 43. First conical seat; 44. Second conical seat; 45. Connecting hole. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Reference Figure 1 - Figure 8 A photovoltaic energy storage power station transmission cable connection device is provided, including a connection end 1 and a plug-in end 2, and a connection mechanism 3 is provided at one end of the plug-in end 2; The connecting mechanism 3 includes a locking housing 31, a locking member 32, a heat dissipation housing 33, a linkage member 34, and a cable plug 35. The locking member 32 is disposed inside the locking housing 31 and is used to be fitted and installed with the connecting end 1. The cable plug 35 is sleeved inside the locking member 32. The heat dissipation housing 33 is sleeved outside the locking housing 31, and a heat dissipation cavity is formed between the heat dissipation housing 33 and the locking housing 31. A heat transfer cavity is formed between the locking housing 31 and the cable plug 35. A sealing plate 311 is movably disposed inside the heat dissipation cavity. The sealing plate 311 divides the heat dissipation cavity into cavity a and cavity b, which are isolated from each other. Cavity b is filled with coolant and is connected to the heat transfer cavity through a flow channel. Heat dissipation holes for heat dissipation are opened on the outer wall of cavity a. The locking housing 31 is also provided with a linkage 34, which is connected to the locking component 32; a locking component 4 is installed on the connecting end 1, which is matched and locked to the locking component 32. When the insertion end 2 is inserted into the connection end 1, the locking member 32 and the locking member 4 perform a locking action, and drive the sealing plate 311 to move in the heat dissipation cavity through the linkage member 34, squeezing the coolant in the cavity b and injecting it into the heat transfer cavity for heat conduction and exchange.

[0020] When the mating end 2 and the connecting end 1 are physically connected, a reliable electrical connection is achieved. The locking member 32 and the locking member 4 on the connecting end 1 perform a locking action. The linkage member 34 is simultaneously converted into the driving force to start the heat dissipation system. After sensing the locking displacement or torque of the locking member 32, the linkage member 34 drives the sealing plate 311 to move within the heat dissipation cavity. The movement directly applies pressure to the sealed cavity b filled with coolant, accurately delivering the coolant stored therein through the flow channel to the heat transfer cavity surrounding the cable plug 35. The cable plug 35 is the core area for current transmission and heat generation, and its temperature begins to rise the instant it is energized. The injection of liquid instantly fills the heat transfer cavity, which was originally mainly composed of air, with a highly thermally conductive liquid working fluid. This fluid exchanges heat fully with the outer surface of the cable connector 35, rapidly absorbing the heat from it. The heat carried is then dissipated into the surrounding environment through the large outer surface area of ​​the heat dissipation shell 33. The heat dissipation holes on the outer wall of the heat dissipation shell 33 are used for gas flow to carry away the conducted heat, completing an efficient heat transfer closed loop. Each successful cable connection is accompanied by a synchronously started, efficient heat dissipation cycle that requires no additional energy and acts directly on the heat source, greatly reducing the risk of initial overheating caused by contact resistance and other factors.

[0021] This heat dissipation system possesses self-adaptability and inherent safety. Its heat dissipation intensity is indirectly related to the electrical connection status, and its physical structure naturally prevents coolant leakage and misoperation. Since the initiation of the heat dissipation cycle is directly related to the locking degree of the locking member 32 and the engaging member 4, the heat dissipation efficiency and mechanical reliability of the connection are increased. Only when the connection is fully and correctly locked in place can the linkage member 34 drive the sealing plate 311 to reach its maximum stroke, thereby injecting sufficient coolant into the heat transfer cavity to achieve the best heat dissipation effect. In addition, the entire cooling circuit is a completely closed system in which the coolant circulates without direct contact with the external environment, effectively preventing evaporation, contamination, and leakage. The sealing design of the sealing plate 311 ensures the isolation of cavity a and cavity b, separating the driving side from the coolant side and enhancing the sealing reliability of the system. This connector, through a linkage liquid cooling heat dissipation design, transforms the mechanical connection action into the driving force for thermal management, achieving significant advantages in structural integration, functional intelligence, safety, reliability, and long service life.

[0022] It should be noted that an air inlet is connected to the outer wall of cavity b, which functions similarly to a one-way valve. When the sealing plate 311 is reset, air is drawn outward through the air inlet, and the liquid will not be drawn back.

[0023] The locking member 32 includes a mating groove 321, a moving groove 322, a locking block 323, and a return spring 324. The mating groove 321 is formed inside the locking housing 31, and two moving grooves 322 are symmetrically formed on the inner wall of the mating groove 321. Each moving groove 322 is provided with a locking block 323, and the tail end of the locking block 323 is connected to the groove wall of the moving groove 322 through the return spring 324.

[0024] The engaging component 4 includes a connecting rod 41, a fixed semi-circular seat 42, a first conical seat 43, a second conical seat 44, and a connecting hole 45. The connecting rod 41 has a connecting hole 45. One end of the connecting rod 41 is fixedly sleeved with the fixed semi-circular seat 42. The first conical seat 43 is movably sleeved on the connecting rod 41 with its conical end close to the fixed semi-circular seat 42. The second conical seat 44 is movably sleeved on the connecting rod 41 and is symmetrically arranged with the first conical seat 43.

[0025] One end of the locking block 323 has an inclined surface that movably fits against the outer end faces of the fixed semi-arc seat 42, the first conical seat 43, and the second conical seat 44.

[0026] When the mating end 2 is mated with the connecting end 1, the connecting rod 41 drives the fixed semi-arc seat 42, the first conical seat 43, and the second conical seat 44 to be inserted into the mating groove 321. The fixed semi-arc seat 42 first contacts the locking block 323, and the outer arc surface of the fixed semi-arc seat 42 contacts the locking block 323. The locking block 323 retracts under the action of the outer arc surface. When the fixed semi-arc seat 42 disengages from the locking block 323, the locking block 323 resets under the action of the spring and is locked in the groove between the fixed semi-arc seat 42 and the first conical seat 43, forming a locked state. When unlocking, the connecting rod 41 is continuously inserted into the mating groove 321, and the outer inclined surface of the first conical seat 43 contacts the locking block 323. The locking block 323 retracts under the action of the inclined surface. The locking block 323 retracts and resets when it passes the inclined surface of the second conical seat 44. When the locking block 323 moves to disengage from the second conical seat 44, the locking block 323 resets. At this time, the connecting rod 41 is pulled out, and the locking block 323 locks onto one end of the second conical seat 44. When the connecting rod 41 is pulled out, it drives the first conical seat 43 and the second conical seat 44 to move on the connecting rod 41. When the first conical seat 43 is pressed against the end face of the first conical seat 43, it is fixed by the first conical seat 43. The locking block 323 is retracted by the inclined surface of the second conical seat 44 and remains in a retracted state when it passes the first conical seat 43 and the fixed semi-arc seat 42. When the fixed semi-arc seat 42 is pulled back to disengage from the locking block 323, the insertion end 2 and the connecting end 1 are unlocked.

[0027] This device requires a continuous inward insertion preparatory action to initiate the unlocking sequence. The connecting rod 41 is continuously pushed deeper into the insertion slot 321, causing the locking block 323 to interact sequentially with the inclined surfaces of the first conical seat 43 and the second conical seat 44, completing the state reset before unlocking. Only then can separation be achieved by pulling back the connecting rod 41. This effectively prevents the significant safety hazard of direct disconnection due to accidental cable pulling. It is particularly suitable for photovoltaic energy storage power station sites with mechanical vibration, frequent personnel activity, or extremely high requirements for connection reliability. In the event of a genuine emergency disconnection, the process is direct and fast enough, requiring no tools and can be performed manually. Completed within seconds, balancing safety and emergency efficiency, the mechanism utilizes the coordinated action of the movable first and second conical seats 43 and the fixed semi-circular seat 42 to achieve adaptive compaction in the locking state and forced guidance during the unlocking process. This ensures absolute reliability and low wear in the mechanism's operation. In the locking state, the locking block 323 is engaged in the groove between the fixed semi-circular seat 42 and the first conical seat 43. At this time, under the continuous pressure of the return spring 324, the inclined surface of the locking block 323 generates a small axial thrust on the first conical seat 43. This thrust ensures that the first and second conical seats 43 and 44 are always oriented towards the fixed semi-circular seat 42. The tendency of the arc seat 42 to move closer and press together provides a dynamic clamping force that automatically compensates for minor gaps that may arise from long-term vibration or temperature changes, ensuring the continuous stability of the locking state and preventing fluctuations and increases in contact resistance. During the unlocking process, when the connecting rod 41 is retracted, the second conical seat 44 is locked by the locking block 323, while the first conical seat 43 moves with the connecting rod 41. The two quickly approach each other until their end faces are pressed together. Its outer contour is formed by the inclined surfaces of the first conical seat 43 and the second conical seat 44. This combined inclined surface provides a continuous, smooth, and forced clamping force to the locking block 323 as the connecting rod 41 continues to retract. The retractable guide ramp ensures that the locking block 323 remains retracted throughout the entire exit path until it is completely disengaged from the fixed semi-circular seat 42. This forced guidance mechanism avoids the risk that the locking block 323 may suddenly pop out in the wrong position during the exit process, causing it to jam the fixed semi-circular seat 42 again, resulting in unlocking failure or component damage. This ensures that every unlocking action can be completed smoothly and reliably, greatly improving the service life of the mechanism and the user experience. Through geometry and motion sequence, the complex locking and unlocking functions are integrated into a compact linear space, achieving extremely high space utilization and functional density.

[0028] The linkage component 34 includes a linkage rod 341, a drive rack 342, a linkage gear 343, a drive screw 344, and a movable plate 345. One end of the linkage rod 341 is connected to the tail end of the locking block 323. The drive rack 342 is provided on the outer wall of the linkage rod 341. The linkage gear 343 is sleeved on the drive screw 344, and one end of the drive screw 344 is fixed to one end of the heat sink housing 33. The movable plate 345 is sleeved on both the drive screw 344 and the linkage rod 341. One end of the movable plate 345 is connected to the sealing plate 311. During the locking process, the radial movement stroke of the locking block 323 is limited. If the sealing plate 311 is directly pushed, the stroke may be insufficient, resulting in insufficient coolant injection. In this design, when the locking block 323 retracts radially inward, it will simultaneously push the linkage rod 341 connected to it to perform linear motion, which is fixed to the linkage. The drive rack 342 on the rod 341 moves accordingly, and the drive rack 342 meshes with the linkage gear 343 sleeved on the drive screw 344, thereby converting the linear motion of the linkage rod 341 into the rotational motion of the linkage gear 343. The rotation of the linkage gear 343 further drives the drive screw 344, which is coaxial with it, to rotate. Finally, the moving plate 345, which is threadedly engaged with the drive screw 344, converts the rotational motion of the drive screw 344 into its own precise and amplified linear displacement under the guidance of the moving plate 345. The linkage 34 converts the small radial linear motion of the locking block 323 into the long stroke linear displacement required by the sealing plate 311 through the gear, rack, and screw composite transmission mechanism, thereby achieving high gain and predictable reliable transmission of mechanical signals and ensuring the precise start and stop of the heat dissipation system.

[0029] The cable connector 35 includes an inner ring 351, a connecting ring 352, a plug 353, and a spring 354. One end of the inner ring 351 is connected to the locking housing 31. A heat transfer fin 3511 is disposed through the inner ring 351. One end of the heat transfer fin 3511 is connected to the outer wall of the connecting ring 352, and the other end of the heat transfer fin 3511 is disposed in the heat transfer cavity. The connecting ring 352 is coaxially disposed inside the inner ring 351. The plug 353 is installed inside the connecting ring 352 through the spring 354. Several heat transfer fins 3511 are disposed in a ring on the inner ring 351.

[0030] The cable connector 35 establishes an efficient, multi-path heat management and stress buffering system, ensuring the thermal stability and mechanical reliability of the electrical connection point. The connector 353 is the core of current transmission and also the main heat source. The connector 353 is floatingly mounted within the connecting ring 352 via a spring element 354. This allows the connector 353 to have a certain axial floating compensation capability when mating with the connecting groove of the connecting end 1, enabling it to adapt to minor alignment deviations. The spring pressure ensures tight contact, effectively reducing contact resistance and insertion / removal wear. The connecting ring 352 serves as the carrier and heat conductor for the connector 353. The heat can be quickly conducted to the multiple heat transfer fins 3511 connected to it. These annularly arranged heat transfer fins 3511 pass through the inner ring 351, and their inner side is connected to the connecting ring 352. Their outer side is directly exposed in the heat transfer cavity filled with coolant, which greatly increases the effective contact heat exchange area with the coolant. It can quickly and evenly conduct and dissipate the Joule heat generated by the plug 353 and the connecting ring 352 into the circulating coolant, avoiding local heat accumulation. The inner ring 351 provides a framework for structural support and thermal management, and firmly integrates the entire heat dissipation system into the locking shell 31.

[0031] One end of the connecting end 1 is provided with a connecting groove for mating with the plug 353. The outer wall of the connecting end 1 is fitted with an outer cover ring 11. The connecting groove, which is specially designed for the plug 353, ensures the precise alignment and insertion depth of the electrical conductor, providing a basis for forming a low-resistance and reliable circuit connection, and realizing precise docking and preliminary protection of the electrical interface.

[0032] The outer ring 11 has a closed groove. One end of the locking housing 31 is connected to an abutment ring 312 that inserts into the closed groove. The abutment ring 312 and the closed groove are connected by a spring. When the spring is in the inserted connection state, it is in the abutment state against the abutment ring 312 and the entire connection mechanism 3. When the cable is pulled in the connection state, the spring in the abutment state can ensure that the locking block 323 and the fixed semi-arc seat 42 maintain a stable locking state, preventing the cable from being dragged and causing the connection mechanism 3 to unlock.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A photovoltaic energy storage power station transmission cable connection device, comprising a connecting end (1) and a plugging end (2), characterized in that, One end of the insertion end (2) is provided with a connecting mechanism (3); The connecting mechanism (3) includes a locking housing (31), a locking member (32), a heat dissipation housing (33), a linkage member (34), and a cable plug (35). The locking member (32) is disposed inside the locking housing (31) and is used to be fitted and installed with the connecting end (1). The cable plug (35) is sleeved inside the locking member (32). The heat dissipation housing (33) is sleeved outside the locking housing (31), and a heat dissipation cavity is formed between the heat dissipation housing (33) and the locking housing (31). A heat transfer cavity is formed between the locking housing (31) and the cable plug (35). A sealing plate (311) is movably disposed inside the heat dissipation cavity. The sealing plate (311) divides the heat dissipation cavity into cavity a and cavity b, which are isolated from each other. Cavity b is filled with coolant and is connected to the heat transfer cavity through a flow channel. The locking housing (31) is also provided with a linkage (34), which is connected to the locking component (32); A locking member (4) is installed on the connecting end (1), and the locking member (4) is matched and locked with the locking member (32); When the insertion end (2) is inserted into the connection end (1), the locking member (32) and the locking member (4) perform a locking action, and drive the sealing plate (311) to move in the heat dissipation cavity through the linkage member (34), squeezing the coolant in the cavity b and injecting it into the heat transfer cavity for heat conduction and exchange.

2. The photovoltaic energy storage power station transmission cable connection device according to claim 1, characterized in that, The locking member (32) includes a mating groove (321), a moving groove (322), a locking block (323), and a return spring (324). The mating groove (321) is opened inside the locking housing (31), and two moving grooves (322) are symmetrically opened on the inner wall of the mating groove (321). Each moving groove (322) is provided with a locking block (323), and the tail end of the locking block (323) is connected to the groove wall of the moving groove (322) through the return spring (324).

3. The photovoltaic energy storage power station transmission cable connection device according to claim 2, characterized in that, The engaging component (4) includes a connecting rod (41), a fixed semi-circular seat (42), a first conical seat (43), a second conical seat (44), and a connecting hole (45). The connecting rod (41) has a connecting hole (45) inside. One end of the connecting rod (41) is fixedly sleeved with the fixed semi-circular seat (42). The first conical seat (43) is movably sleeved on the connecting rod (41) and its conical end is close to the fixed semi-circular seat (42). The second conical seat (44) is movably sleeved on the connecting rod (41) and is symmetrically arranged with the first conical seat (43).

4. The photovoltaic energy storage power station transmission cable connection device according to claim 3, characterized in that, The locking block (323) has an inclined surface at one end that is movably fitted to the outer end face of the fixed semi-arc seat (42), the first conical seat (43), and the second conical seat (44).

5. The photovoltaic energy storage power station transmission cable connection device according to claim 1, characterized in that, The linkage component (34) includes a linkage rod (341), a drive rack (342), a linkage gear (343), a drive screw (344), and a moving plate (345). One end of the linkage rod (341) is connected to the tail end of the locking block (323). A drive rack (342) is provided on the outer wall of the linkage rod (341). The linkage gear (343) is sleeved on the drive screw (344), and one end of the drive screw (344) is fixed to one end of the heat dissipation shell (33).

6. The photovoltaic energy storage power station transmission cable connection device according to claim 5, characterized in that, The movable plate (345) is respectively sleeved on the drive screw (344) and the linkage rod (341), and one end of the movable plate (345) is connected to the sealing plate (311).

7. The photovoltaic energy storage power station transmission cable connection device according to claim 1, characterized in that, The cable connector (35) includes an inner ring (351), a connecting ring (352), a plug (353), and a spring (354). One end of the inner ring (351) is connected to the locking housing (31). A heat transfer fin (3511) is provided through the inner ring (351). One end of the heat transfer fin (3511) is connected to the outer wall of the connecting ring (352). The other end of the heat transfer fin (3511) is located in the heat transfer cavity. The connecting ring (352) is coaxially arranged inside the inner ring (351). The plug (353) is installed inside the connecting ring (352) through the spring (354).

8. The photovoltaic energy storage power station transmission cable connection device according to claim 7, characterized in that, The heat transfer fins (3511) are provided in a plurality of manner, and the plurality of heat transfer fins (3511) are arranged in a ring on the inner ring (351).

9. A photovoltaic energy storage power station transmission cable connection device according to claim 7, characterized in that, One end of the connecting end (1) is provided with a connecting groove for insertion and connection with the plug (353), and an outer cover ring (11) is sleeved on the outer wall of the connecting end (1).

10. A photovoltaic energy storage power station transmission cable connection device according to claim 9, characterized in that, The outer cover ring (11) has a closed groove, and one end of the locking shell (31) is connected to an abutment ring (312) that is inserted into the closed groove. The abutment ring (312) and the closed groove are connected by a spring.

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