Flame-retardant power cable connector

Abstract

This invention discloses a flame-retardant power cable connector, belonging to the field of cable connection technology, and suitable for connecting lightweight high-temperature energy storage cables. The connector includes a single-core electrical connection module, a single-core sealing module, and a single-core sealing module. The single-core electrical connection module uses a silver-plated copper connector with a tapered hole and contraction joint to achieve low-resistance, high-stability crimping of the battery core's metal conductor. The single-core sealing module uses a triple progressive sealing process—mechanical compression, glue injection curing, and thermoplastic encapsulation—to independently and deeply seal the insulation layer of each connected battery core, effectively blocking moisture. The single-core sealing module uses a pre-tightening outer sealing kit to seal the entire cable joint, and is equipped with a pre-tightening mechanism that adapts to changes in cable tension, preventing seal failure due to thermal expansion and contraction or external forces. This invention solves the problems of halogen-containing flame-retardant cable joints being susceptible to moisture corrosion and having insufficient sealing reliability, significantly improving the long-term electrical safety and service life of the connection point.

Description

Technical Field

[0001] This invention relates to the field of cable connection technology, and in particular to a flame-retardant power cable connector. Background Technology

[0002] With the rapid development of the new energy industry, especially the large-scale application of energy storage systems, lightweight high-temperature resistant energy storage cables have been widely used. These cables are typically compact in design, lightweight, and can operate stably in high-temperature environments to meet the high energy density and demanding operating conditions required by energy storage devices. To ensure safety, halogen-containing flame retardants are often added to their insulation layer to improve the flame-retardant properties of the material.

[0003] However, in engineering practice, the connection joints of the aforementioned halogen-containing flame-retardant cables have become a weak link in long-term reliability. Because cable connection operations can damage the integrity of the insulation layer, if the joint is not properly sealed, moisture from the external environment can easily penetrate. This moisture reacts chemically with the halogens in the cable material upon heating, generating highly corrosive acids. These acids not only corrode the metal conductors of the cable core, leading to increased contact resistance, localized overheating, and even malfunctions, but also continuously erode the insulation material itself, accelerating its aging and seriously threatening the electrical safety and service life of the entire cable system. Furthermore, the thermal expansion and contraction caused by changes in ambient temperature during cable operation, as well as external mechanical stresses caused by installation tension and wind loads, can cause traditional statically sealed joints to gradually loosen, further exacerbating seal failure and corrosion risks. This places extremely high demands on the long-term sealing stability and environmental adaptability of the connection technology.

[0004] In summary, existing technologies lack a comprehensive solution for connecting lightweight, high-temperature resistant, halogen-containing flame-retardant energy storage cables that can fundamentally block moisture intrusion and adapt to changes in external mechanical stress to maintain a durable and reliable seal. Therefore, this invention provides a highly targeted, multi-layered sealing flame-retardant power cable connector with dynamic compensation capabilities. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a flame-retardant power cable connector, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the embodiments of this application provide the following technical solution: This invention provides a flame-retardant power cable connector for connecting two lightweight high-temperature energy storage cables, including a single-core electrical connection module, a single-core sealing module, and a single-seal module. The single-core electrical connection module is used to tightly and electrically connect the metal conductors of corresponding single cores in the two cables; the single-core sealing module is used to seal the insulation layer of each core after being connected by the single-core electrical connection module; the single-seal module is used to seal the outermost insulation layer of the two cables as a whole; after the cable as a whole is pre-tightened, the sealing connection point can adaptively tighten; the single-core electrical connection module, the single-core sealing module, and the single-seal module are installed sequentially and together constitute a multi-seal electrical connection structure from the inside out.

[0007] During connection, the single-core sealing module first performs a triple progressive sealing operation on the outside of the metal connection point of the single core, which consists of mechanical compression sealing, glue injection curing sealing and thermoplastic sealing. Then, the single-core sealing module performs a pre-tightening dynamic sealing operation on the sealing connection point of the entire cable.

[0008] According to an advantageous embodiment, the single-core electrical connection module includes a metal female connector and a metal female connector. One end of the metal female connector is provided with a stepped circular hole, and the other end is provided with a conical hole communicating with it. The diameter of the stepped circular hole is adapted to the outer diameter of a single battery cell. The outer wall of the metal female connector is conical and stepped with uniformly spaced contraction slits. Its conical end is used to mate with the conical hole of the metal female connector. When the metal female connector is screwed into the conical hole, its conical section is squeezed and contracts towards the center to compress the internal battery cell conductor.

[0009] According to an advantageous embodiment, the single-core sealing module includes a central sealing sleeve, a conical sealing sleeve, and a cylindrical sealing sleeve. The central sealing sleeve is fitted over the outside of the single-core electrical connection module. One end of its inner wall is conical, and the other end of its inner wall is beveled. Its interior is stepped to accommodate the single-core electrical connection module. The conical sealing sleeve has uniformly distributed shrinkage grooves on its conical outer wall, which are threadedly engaged with the conical end of the central sealing sleeve. The cylindrical sealing sleeve is threadedly engaged with the beveled section of the central sealing sleeve, and a sealing gasket is provided at the connection between the two.

[0010] The outer wall of the middle sealing sleeve and the cylindrical sealing sleeve are both provided with material receiving cavities, and the middle sealing sleeve is provided with an injection port communicating with the material receiving cavity for injecting sealant.

[0011] According to an advantageous embodiment, the single-core sealing module further includes a thermoplastic sleeve, which is fitted over the assembled outer surface of the central sealing sleeve, the conical sealing sleeve, and the cylindrical sealing sleeve; wherein the inner wall of the thermoplastic sleeve is pre-coated with hot melt adhesive to achieve zero-gap sealing through heat shrinkage.

[0012] According to an advantageous embodiment, the single-core sealing module includes an outer isolation sealing sleeve, an annular washer, a sealing inner connector sleeve, and a compression sleeve. The outer isolation sealing sleeve is fitted onto the joint of the two cables, with symmetrical annular grooves on the outer walls at both ends and symmetrical internal thread mounting slots with oblique cross-sections on the inner walls at both ends. The annular washer is disposed within the annular grooves. The sealing inner connector sleeve is movably fitted onto both ends of the outer isolation sealing sleeve, with its inner wall abutting against the side wall of the annular washer. The compression sleeve is threadedly connected to the sealing inner connector sleeve, with a rectangular slot on one side wall for threaded connection with the internal thread mounting slot at the end of the outer isolation sealing sleeve, and an annular compression groove on its inner wall to compress the outermost insulation layer of the cable.

[0013] According to an advantageous embodiment, the single-seal module further includes a pre-tightening element for applying an adaptive pre-tightening force to the cable sealing connection point. The pre-tightening element includes a pre-tightening collar, multiple pre-tightening wedges, multiple L-shaped pullers, a threaded ring, a pre-tightening claw, and through holes. The inner diameter of the pre-tightening collar is adapted to the outer diameter of the cable. Multiple pre-tightening wedges are radially slidably disposed within the pre-tightening collar. Multiple L-shaped pullers are slidably disposed along the axial direction of the pre-tightening collar and correspond one-to-one with the pre-tightening wedges and are inclinedly engaged. The threaded ring is threadedly connected to the outer wall of the pre-tightening collar and connected to the horizontal section of the L-shaped puller. A spring is sleeved on the L-shaped puller between the threaded ring and the pre-tightening collar. The pre-tightening claw is snapped and fixed to the outer wall of the inner sealing connector sleeve. Through holes are provided at the end of the horizontal section of the L-shaped puller and a plurality of through holes are also uniformly provided at one end of the pre-tightening claw. The end of the L-shaped puller and the end of the pre-tightening claw are fixedly connected by a pin passing through the corresponding through hole.

[0014] According to an advantageous embodiment, the sealing gasket is made of silicone rubber.

[0015] According to an advantageous embodiment, the annular gasket is made of silicone rubber.

[0016] According to an advantageous embodiment, the metal female head and the metal female head are made of corrosion-resistant copper with silver-plated outer walls.

[0017] Compared with existing technologies, the flame-retardant power cable connector provided by this invention has the following beneficial effects: 1. This invention adopts a layered and progressive sealing strategy, combining physical compression, chemical filling, and overall wrapping to form three mutually synergistic sealing barriers. The first level uses a single-core electrical connection module with a silver-plated corrosion-resistant copper metal female head and metal female head to achieve a self-tightening structure, which reduces electrochemical corrosion from the source while achieving a stable electrical connection. The second level uses a single-core sealing module that integrates mechanical compression sealing, glue injection curing sealing, and thermoplastic sleeve overall thermoplastic sealing, eliminating the microscopic gaps between the insulation layer and the sealing element, achieving "zero gap" enclosure of the single core connection point, effectively preventing moisture intrusion and reaction with halogens. The third level uses a single-core sealing module to complete the final protection of the entire cable joint through an overall outer layer sealing and pre-tightening structure. This system systematically and actively disrupts the reaction chain of "moisture + halogen → corrosive acid", fundamentally solving the technical problem of joint corrosion in halogen-containing flame-retardant cables during long-term use.

[0018] 2. This invention integrates an innovative adaptive pre-tightening component into a single sealing module when connecting cables. The adaptive pre-tightening component dynamically converts the axial tension caused by temperature changes in the cable (such as reduced sag and increased tension at low temperatures) into radial clamping force on the cable insulation layer through the cooperation of the pre-tightening claw and the inclined surface of the L-shaped pull member. This achieves a dynamic compensation effect where the sealing pressure adaptively increases with the increase of external mechanical stress, keeping the connection point in a stable mechanical environment. This solves the problem of sealing pressure attenuation and reliability reduction in traditional joints under thermal cycling or vibration conditions, and significantly improves the long-term sealing reliability and service life of cable connections in complex service environments. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the flame-retardant power cable connector after the cable is connected.

[0020] Figure 2 For the present invention Figure 1 A sectional view at the front view position.

[0021] Figure 3 For the present invention Figure 2 A magnified view of section A in the image.

[0022] Figure 4 For the present invention Figure 2 A magnified view of section B in the image.

[0023] Figure 5 This is a three-dimensional structural diagram of the metal sub-head of the present invention.

[0024] The attached diagram shows the following labels: 1. Single-core electrical connection module; 2. Single-core sealing module; 3. Single-seal module; 11. Metal female head; 12. Metal female head; 111. Stepped round hole; 112. Conical hole; 21. Middle sealing sleeve; 22. Conical sealing sleeve; 23. Cylindrical sealing sleeve; 24. Sealing gasket; 25. Thermoplastic sleeve; 211. Material cavity; 212. Injection port; 31. Outer isolation sealing sleeve; 32. Sealing inner connector sleeve; 33. Compression sleeve; 34. Pre-tightening component; 311. Internal threaded mounting groove; 312. Annular gasket; 331. Rectangular groove; 332. Annular compression groove; 341. Pre-tightening collar; 342. Pre-tightening wedge; 343. L-shaped puller; 344. Threaded ring; 345. Through hole; 346. Pre-tightening claw; 347. Pin. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail.

[0026] Please refer to the following: Figure 1 and Figure 2 A flame-retardant power cable connector is mainly used for connecting lightweight high-temperature energy storage cables. It includes a single-core electrical connection module 1, a single-core sealing module 2, and a single-core sealing module 3. The single-core electrical connection module 1 is used to tightly connect the metal layers of a single core in two cables. The single-core sealing module 2 is used to seal the insulation layers of the two cores connected by the single-core electrical connection module 1. The single-core sealing module 3 is used to seal the outermost insulation layers of the two cables. After pre-tightening, the sealing connection point of the connected cable can adaptively pre-tighten.

[0027] Specifically, when connecting the lightweight high-temperature energy storage cable using the aforementioned cable connector, firstly, peel off one centimeter of the outermost insulation layer of all the cells at the connection points of the two cables. Then, connect all the corresponding cells one-to-one using the single-core electrical connection module 1 to ensure the conductivity of the connected cells. After completion, use the single-core sealing module 2 to perform secondary internal sealing on each connected cell. Finally, use the single-core sealing module 3 to pre-tighten the insulation layer at the connection point of the two cables. If the cable shakes under external force, the single-core sealing module 3 will pre-tighten the cable connection point to ensure that the sealing system at the connection point will not fail due to shaking.

[0028] To achieve a reliable and corrosion-resistant electrical connection between the conductors of the cable core, refer to... Figure 1 and Figure 4 and Figure 5The single-core electrical connection module 1 includes a metal female connector 11 and a metal female connector 12. One end of the metal female connector 11 is provided with a stepped circular hole 111, and the other end is provided with a tapered hole 112 with a gradually changing diameter. The tapered hole 112 is connected to the stepped circular hole 111. The diameter of the stepped circular hole 111 is the same as the outer diameter of a single battery cell. The outer wall of the metal female connector 12 is a stepped tapered structure. The outer wall of the metal female connector 12 is uniformly provided with shrinkage slits. The tapered end of the metal female connector 12 mates with the tapered hole 112 of the metal female connector 11. During the process of inserting the metal female connector 12 into the tapered hole 112, the tapered section of the metal female connector 12 shrinks towards the center.

[0029] Before connecting the two battery cores, it is necessary to ensure that the cut surface of the cable bundle at the joint is dry and free of oxide layer, and that the connection point of the battery cores is clean. Then, a metal female head 11 is fitted onto the outer wall of the insulation layer of one battery core, and a metal female head 12 is fitted onto the outer wall of the insulation layer of the other battery core. During connection, the conical outer wall section of the metal female head 12 is screwed into the conical hole 112 of the metal female head 11. As it is screwed in, the conical outer wall section of the metal female head 12 gradually moves towards the axis due to the contraction joint, thereby pressing and locking the metal conductor of the internal battery core through the inner wall of the metal female head 12, forming a low-resistance, high-stability electrical connection. This prevents poor contact and overheating caused by the cable shaking due to external forces or other conditions in the later stages. Furthermore, both the metal female head 11 and the metal female head 12 that press the two battery cores together are made of corrosion-resistant copper material with silver-plated outer walls. The silver plating layer greatly improves the corrosion resistance and conductivity of the joint, reducing the risk of overheating caused by oxidation and corrosion at the contact point from the source.

[0030] To improve the sealing effect after electrical connection of individual battery cells and prevent moisture intrusion caused by environmental factors, this embodiment constructs a triple progressive sealing barrier for each individual battery cell. For details, please refer to [link / reference needed]. Figure 2 and Figure 4 The single-core sealing module 2 includes a central sealing sleeve 21, a conical sealing sleeve 22, and a cylindrical sealing sleeve 23. The central sealing sleeve 21 is sleeved on the outside of the single-core electrical connection module 1. One end of the central sealing sleeve 21 has a conical inner wall and the other end has a bevel. The outer wall of the conical section of the conical sealing sleeve 22 has uniformly arranged shrinkage grooves. The conical sealing sleeve 22 is threadedly engaged with the conical end of the central sealing sleeve 21. The cylindrical sealing sleeve 23 is threadedly engaged with the beveled section of the central sealing sleeve 21. A sealing gasket 24 is also provided at the connection between the cylindrical sealing sleeve 23 and the central sealing sleeve 21.

[0031] Before installing the single-core electrical connection module 1, the middle sealing sleeve 21 and the conical sealing sleeve 22 need to be pre-fitted onto the outer wall of the battery cell located on the side of the metal female head 11, and the cylindrical sealing sleeve 23 needs to be fitted onto the outer wall of the battery cell located on the side of the metal female head 12. When connecting the single-core sealing module 2, adjust the position of the middle sealing sleeve 21 to ensure that the single-core electrical connection module 1 is completely located inside the middle sealing sleeve 21, and that both ends of the middle sealing sleeve 21 are located at the insulation layer of the battery cell. Then, the conical sealing sleeve 22 is screwed to engage with the conical inner wall of the middle sealing sleeve 21. During the screwing process, the conical sealing sleeve 22 has a tapered opening on its outer wall. The shrinking groove, whose outer wall shrinks as a whole, compresses the insulation layer of the outer wall of the battery cell. After completion, the cylindrical sealing sleeve 23 on the opposite side is screwed on. The cylindrical sealing sleeve 23 and the bevel section of the middle sealing sleeve 21 are threaded together. The cylindrical sealing sleeve 23 compresses the insulation layer of the outer wall of the battery cell. At the same time, during the screwing of the cylindrical sealing sleeve 23, the sealing gasket 24 on its outer wall abuts against the bevel of the middle sealing sleeve 21. The sealing gasket 24 seals the connection position to prevent moisture intrusion. The sealing gasket 24 is made of silicone rubber, which has excellent elasticity and heat resistance.

[0032] See Figure 4 The inner sealing sleeve 21 is stepped, and the single-core electrical connection module 1 cooperates with the stepped part of the inner sealing sleeve 21. The outer wall of the inner sealing sleeve 21 is symmetrically provided with two material receiving cavities 211 of different sizes. The material receiving cavity 211 is provided with a material injection port 212. The cylindrical sealing sleeve 23 is also provided with a material receiving cavity 211, and the material receiving cavity 211 on the cylindrical sealing sleeve 23 is configured to cooperate with one of the material receiving cavities 211 on the inner sealing sleeve 21.

[0033] To further prevent moisture from seeping into the insulation layer of the cable due to temperature-induced shrinkage, which could cause moisture to react with the halogens inside the insulation layer after heating and form a corrosive acid, sealant is injected at the injection port 212. The injected sealant fills the material cavity 211 and any possible micro-gaps. After the sealant cures, it forms an impenetrable solid sealing layer, effectively preventing moisture from seeping into the gaps caused by the thermal expansion and contraction of the insulation layer.

[0034] It should be noted that if the cable connector at this location needs to be inspected and maintained later, the sealant can be softened by heating, and then the middle sealing sleeve 21 and other connecting parts can be removed by manual pulling.

[0035] See Figure 4The single-core sealing module 2 also includes a thermoplastic sleeve 25 fitted onto the outer wall of the assembled central sealing sleeve 21, conical sealing sleeve 22, and cylindrical sealing sleeve 23. When the thermoplastic sleeve 25 further seals the assembly of the central sealing sleeve 21, conical sealing sleeve 22, and cylindrical sealing sleeve 23, hot melt adhesive needs to be pre-coated onto the inner wall of the thermoplastic sleeve 25. When heated, the thermoplastic sleeve 25 shrinks to achieve a zero-gap seal, which not only completely blocks the intrusion of external moisture but also prevents the diffusion of trace amounts of acidic gas that may be generated inside the cable due to overheating, fundamentally destroying the reaction conditions that cause corrosion.

[0036] During the sealing connection of a single battery cell, the single-core sealing module 2 achieves the first layer of mechanical compression sealing between the connected battery cells through the middle sealing sleeve 21, the conical sealing sleeve 22, and the cylindrical sealing sleeve 23. At the same time, the gap between the middle sealing sleeve 21 and the insulation layer of the outer wall of the battery cell is reserved for filling with sealant to achieve the second layer of injection curing sealing. Finally, the thermoplastic sleeve 25 achieves the third layer of overall thermoplastic sealing of the middle sealing sleeve 21, the conical sealing sleeve 22, and the cylindrical sealing sleeve 23 outside the connected single battery cell, which fully prevents moisture intrusion.

[0037] To further seal all individual cells at the joint of the two cables and improve the connection strength of the sealed joint, refer to... Figure 2 and Figure 3 The single-wire sealing module 3 includes an outer isolation sealing sleeve 31 fitted onto the interface of two cables. The outer walls of both ends of the outer isolation sealing sleeve 31 are symmetrically provided with annular grooves, and the inner walls of both ends of the outer isolation sealing sleeve 31 are symmetrically provided with internal thread mounting slots 311, the cross-section of which is beveled. An annular washer 312 is provided inside the annular groove. Sealing inner connector sleeves 32 are movably fitted onto both ends of the outer isolation sealing sleeve 31. The vertical inner... The wall abuts against the vertical side wall of the annular washer 312. The inner thread of the sealing inner connector sleeve 32 is connected to the compression sleeve 33. One side wall of the compression sleeve 33 is provided with a rectangular slot 331, and the rectangular slot 331 of the compression sleeve 33 is threadedly connected to the internal threaded mounting slot 311 at the end of the outer isolation sealing sleeve 31. The inner wall of the compression sleeve 33 is uniformly provided with annular compression grooves 332, and the compression sleeve 33 is pressed tightly against the outer wall of the outermost insulation layer of the cable through the annular compression grooves 332.

[0038] Specifically, during installation, before installing the single-core electrical connection module 1, a compression sleeve 33, an annular washer 312, and a sealing inner connector sleeve 32 need to be fitted onto the outside of both cables. An outer isolation sealing sleeve 31 is also fitted onto the outside of any one of the cables. During sealing, the annular washer 312 is moved and secured within the annular groove. Then, the sealing inner connector sleeve 32 and the compression sleeve 33 press the outer insulation layer of the cable. During the tightening of the compression sleeve 33 and the sealing inner connector sleeve 32, the two work together to compress the annular washer 312, causing it to deform. The annular washer 312 is made of silicone rubber. The deformation of the annular washer 312 further seals the connection point, improving its sealing performance. The outer isolation sealing sleeve 31, the sealing inner connector sleeve 32, and the compression sleeve 33 further seal the entire outer layer of the cable joint.

[0039] To address the issue of loosening and failure of the sealing connection points at cable joints caused by the thermal expansion and contraction of the outermost insulation layer due to temperature changes, please refer to... Figure 1 and Figure 3 The single-core sealing module 3 further includes a pre-tightening member 34 disposed on the outermost layer of the cable. The pre-tightening member 34 includes a pre-tightening collar 341 adapted to the outer diameter of the cable. Several pre-tightening wedges 342 are slidably disposed inside the pre-tightening collar 341, moving radially therein. Several L-shaped pull members 343, corresponding one-to-one with the pre-tightening wedges 342, are also evenly slidably disposed on the pre-tightening collar 341. The L-shaped pull members 343 slide along the axial direction of the pre-tightening collar 341, and engage with the inclined surfaces of the pre-tightening wedges 342. A threaded ring 344 is threaded on the outer wall of the horizontal section of the pre-tightening collar 341. A spring is sleeved on the outer wall of the L-shaped pull member 343 between the threaded ring 344 and the pre-tightening collar 341. A vertical through hole 345 is provided at the end of the horizontal section of the L-shaped pull member 343. The pre-tightening member 34 also includes a pre-tightening claw 346 that is snapped and fixed to the outer wall of the sealing inner connector sleeve 32. The other end of the pre-tightening claw 346 is also evenly provided with through holes 345. The pre-tightening claw 346 and the L-shaped pull member 343 are fixed by a pin 347 that passes through the corresponding through hole 345.

[0040] As the temperature changes from high to low, the sag of the cable connecting the two power poles decreases due to the temperature change, resulting in an increase in the overall tensile force on the cable between the two power poles. If the connection point of the two cables is located between the two power poles, the increased tensile force will reduce the sealing strength of the cable connection point. To ensure the sealing strength of the connection point, the pre-tightening member 34 can adaptively pre-tighten the sealing connection point. Specifically, when the sag of the cable between the two power poles decreases, the increased tensile force is directly transmitted to the L-shaped pull member 343 through the pre-tightening claw 346. The L-shaped puller 343 engages with the inclined surface of the pre-tightening wedge 342 to press against the pre-tightening wedge 342, causing it to tend to move towards the cable axis. As a result, multiple pre-tightening wedges 342 on the inner periphery of the pre-tightening collar 341 work together to press the insulation layer outside the cable connection point. After pressing, the cable connection point is in a relatively stable stress state. During the process of increased cable tension caused by the external environment, the dynamic pre-tightening of the cable insulation layer away from the connection point can effectively ensure the sealing strength of the cable connection point, prevent the sealing structure from failing due to loosening, and ensure long-term sealing reliability.

[0041] By using a single sealing module 3 to re-tighten and seal all the sealed connections of the cable cores, the connection strength and sealing performance at the cable sealing connection points are ensured to be unaffected by temperature changes. This further avoids moisture intrusion caused by loose cable joints and corrosion caused by halogen reactions in the insulation layer at the cable cross-section.

[0042] It should be noted that this cable connector, from single-core processing to overall encapsulation, incorporates modular structural designs (such as pre-fitting, thread tightening, and the 212 injection port design) with ease of on-site installation in mind. This modular design reduces the reliance on the experience of wiring personnel, enabling high-quality sealing through standardized operating procedures and minimizing human error. Simultaneously, the clear hierarchical structure facilitates future testing and maintenance, resulting in a connection performance far superior to existing cable connectors. Therefore, this technology not only represents a breakthrough in performance but also offers significant advantages in terms of ease of use, reliability, and maintainability in engineering applications, facilitating standardized promotion.

[0043] The specific assembly process for connecting two cables using this cable connector is as follows: First, peel off about 1 cm of the outermost insulation layer of each core at the ends of the two cables to be connected to expose the internal conductors. Then, keep the cable end faces clean, dry, and free from oxidation. Finally, perform the following steps in sequence: Primary conductive connection operation: Reliably connect all the corresponding core conductors through the single-core electrical connection module 1.

[0044] Secondary internal sealing process: Each connected cell is individually and deeply sealed using the single-core sealing module 2.

[0045] Overall pre-tightening sealing operation: Finally, the entire joint of the two cables is sealed with a single sealing module 3, and an adaptive pre-tightening force is applied near the sealing connection point using the tension of the cables themselves.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A flame-retardant power cable connector for connecting two energy storage cables, characterized in that, include: A single-core electrical connection module is used to tightly electrically connect the metal conductors of corresponding single cores in two cables; A single-core sealing module is used to seal the insulation layer of each battery cell after it has been connected by the single-core electrical connection module. A single sealing module is used to seal the outermost insulation layer of two cables; after the connection is made, the sealing connection point of the cable can automatically adjust to the pre-tightening position. The single-core electrical connection module, the single-core sealing module, and the single-seal module are installed sequentially and together form a multi-seal electrical connection structure from the inside out. The single-core electrical connection module includes: The metal female connector has a stepped circular hole at one end and a conical hole communicating with it at the other end. The diameter of the stepped circular hole is adapted to the outer diameter of a single battery cell. The metal female head has a tapered stepped outer wall with uniformly spaced shrinkage slits, and its tapered end is used to mate with the tapered hole of the metal female head. When the metal tip is screwed into the conical hole, its conical section is squeezed and contracts toward the center to press the internal battery core conductor; The single-core sealing module includes: The central sealing sleeve is fitted outside the single-core electrical connection module. One end of its inner wall is conical, and the other end of its inner wall is beveled. Its interior is stepped to accommodate the single-core electrical connection module. A conical sealing sleeve has uniformly arranged shrinkage grooves on its conical outer wall, which are threadedly engaged with the conical end of the middle sealing sleeve. A cylindrical sealing sleeve is threaded to the bevel section of the middle sealing sleeve, and a sealing gasket is provided at the connection between the two. The outer wall of the middle sealing sleeve and the cylindrical sealing sleeve are both provided with material cavities, and the middle sealing sleeve is provided with an injection port that communicates with the material cavities for injecting sealant. During connection, the single-core sealing module first performs a triple progressive sealing operation on the outside of the metal connection point of the single core, which consists of mechanical compression sealing, glue injection curing sealing and thermoplastic sealing. Then, the single-core sealing module performs a pre-tightening dynamic sealing operation on the sealing connection point of the entire cable.

2. The flame-retardant power cable connector according to claim 1, characterized in that: The single-core sealing module also includes: A thermoplastic sleeve is fitted over the assembled outer portion of the central sealing sleeve, the conical sealing sleeve, and the cylindrical sealing sleeve. The inner wall of the thermoplastic sleeve is pre-coated with hot melt adhesive, which achieves a zero-gap seal through heat shrinkage.

3. A flame-retardant power cable connector according to claim 1, characterized in that: The single sealing module includes: The outer isolation sealing sleeve is fitted onto the joint of the two cables. Symmetrical annular grooves are provided on the outer walls at both ends, and symmetrical internal thread mounting slots with oblique cross-sections are provided on the inner walls at both ends. An annular washer is disposed within the annular groove; The inner sealing sleeve is movably fitted at both ends of the outer isolation sealing sleeve, and its inner wall abuts against the side wall of the annular gasket. A compression sleeve is threadedly connected to the inner sealing connector. One end of the sleeve has a rectangular groove for threaded connection with the inner thread mounting groove at the end of the outer isolation sealing sleeve. The inner wall of the sleeve has an annular compression groove to compress the outermost insulation layer of the cable.

4. A flame-retardant power cable connector according to claim 3, characterized in that: The single-seal module also includes: Preload elements, used to apply adaptive preload force at cable sealing connection points, include: Pre-tightening collar, the inner diameter of which is adapted to the outer diameter of the cable; Multiple pre-tightening wedges are slidably disposed within the pre-tightening collar along the radial direction; Multiple L-shaped pull members are slidably arranged along the axis of the pre-tightening collar and correspond one-to-one with the pre-tightening wedges and are engaged with inclined surfaces. A threaded ring is threaded to the outer wall of the pre-tightening sleeve and connected to the horizontal section of the L-shaped pull member. A spring is sleeved on the L-shaped pull member between the threaded ring and the pre-tightening sleeve. Pre-tightening claws are engaged and fixed to the outer wall of the inner sealing connector sleeve; Through holes are provided at the end of the horizontal section of the L-shaped pull member and at one end of the pre-tightening claw. The end of the L-shaped pull member and the end of the pre-tightening claw are fixedly connected by a pin passing through the corresponding through hole.

5. A flame-retardant power cable connector according to claim 1, characterized in that, The sealing gasket is made of silicone rubber.

6. A flame-retardant power cable connector according to claim 3, characterized in that, The annular gasket is made of silicone rubber.

7. A flame-retardant power cable connector according to claim 1, characterized in that, The metal female head and the metal female head are made of corrosion-resistant copper with silver-plated outer walls.

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