A via connector and a battery box

Abstract

The utility model relates to battery box structure technical field, concretely relates to a via hole connector and battery box, include: connector casing, be equipped with the sealing groove that penetrates the connector casing on it, the sealing groove is passed for cable, wire harness sealing ring, install in the sealing groove, with the inner wall interference fit of connector casing, wire harness sealing ring baffle, install on the connector casing and be located one side of sealing groove, wire harness sealing ring baffle carries out axial location to wire harness sealing ring, wire harness locking buckle, detachably install on the connector casing and be located the other side of sealing groove, wire harness locking buckle carries out locking location to the cable part that projects sealing groove. The utility model through sealing and mechanical locking combined mode, realized the high pressure sealing, anti -loose and anti -drop and the anti -pulling ability when cable is in the battery box, effectively promoted the environmental sealing reliability, safety and the connection stability of battery box.

Description

Technical Field

[0001] This utility model relates to the field of battery box structure technology, specifically to a through-hole connector and a battery box. Background Technology

[0002] With the rapid popularization of new energy technologies, the two- and three-wheeled vehicle industry is undergoing profound changes. Lithium batteries, due to their high energy density and environmentally friendly characteristics, are gradually becoming the preferred power source for two- and three-wheeled vehicles. However, users in this field are generally price-sensitive, and the vehicles are mostly used for short-distance home travel under relatively stable operating conditions. To reduce costs and enhance market competitiveness, most lithium battery boxes on the market now use gland connectors instead of traditional high-cost connectors. This method achieves a seal by tightening the nut to compress the wiring harness.

[0003] In existing technologies, the cable outlet method for battery boxes relies on manually tightening the nuts to ensure a seal. However, in practical use, the cable outlet method has at least the following shortcomings:

[0004] 1) The tightening force of the nut will gradually decrease with the number of uses, the duration of use, or the user's disassembly and assembly;

[0005] 2) Different users have significantly different understandings of manually tightening nuts. Insufficient tightening force may fail to lock the wiring harness, easily leading to water ingress and wire slippage; over-tightening may cause the gland thread to strip, completely losing its locking function. Although there are professional torque-controlled tools that can replace manual tightening for precise control of nut tightening, users typically do not carry such tools due to their complexity, high price, or inconvenience in carrying them.

[0006] The above reasons make it difficult to guarantee the sealing reliability of the lithium battery box using the existing Gland connector cable exit method. Utility Model Content

[0007] To solve the above technical problems, this utility model provides a technical solution for a through-hole connector and a battery housing.

[0008] The technical problem solved by this utility model can be achieved by the following technical solution:

[0009] A via connector, comprising:

[0010] A connector housing with a sealing groove extending through it, the sealing groove allowing a cable to pass through;

[0011] A wire harness sealing ring is installed in the sealing groove and is interference-fitted with the inner wall of the connector housing;

[0012] A wire harness sealing ring baffle is installed on the connector housing and located on one side of the sealing groove. The wire harness sealing ring baffle axially limits the wire harness sealing ring.

[0013] A wire harness locking buckle is detachably mounted on the connector housing and located on the other side of the sealing groove. The wire harness locking buckle locks and limits the cable portion extending out of the sealing groove.

[0014] Preferably, the connector housing is provided with a locking structure, the locking structure protruding to the side opposite to the sealing groove and having an opening facing the cable;

[0015] The wire harness locking buckle is detachably fastened to the locking structure.

[0016] Preferably, the wire harness locking buckle has an opening facing the cable, and the opening of the wire harness locking buckle is provided with an inner rib of the wire harness locking buckle;

[0017] The locking structure has an inner rib of the connector housing at its opening. When the wire harness locking buckle is fastened to the locking structure, the inner rib of the wire harness locking buckle cooperates with the inner rib of the connector housing to clamp the cable.

[0018] Preferably, the locking structure includes a supporting part and a locking part. When the cable passes through the sealing groove, the supporting part supports the cable from below, and the locking part is located on the side of the cable.

[0019] Preferably, the wire harness locking buckle includes a cover portion and a locking portion. When the wire harness locking buckle is fastened to the locking structure, the cover portion covers the top of the cable, and the locking portion engages with the locking portion.

[0020] Preferably, the device further includes a housing sealing ring, which is fitted into an annular groove on the outer periphery of the sealing groove. The lower surface of the housing sealing ring is in contact with the surface of the connector housing, and the upper surface of the housing sealing ring axially protrudes from the surface of the connector housing.

[0021] Preferably, the wire harness sealing ring baffle is provided with a buckle on the side facing the connector housing, and the connector housing is provided with a slot. The buckle engages with the slot to fix the wire harness sealing ring baffle on the connector housing.

[0022] Preferably, it also includes a mounting panel, and the connector housing is mounted to the mounting panel by fastening bolts.

[0023] Preferably, both the wire harness sealing ring baffle and the mounting panel are provided with positioning through holes, and the connector housing extends a positioning post on the side facing the wire harness sealing ring baffle. The positioning post passes through the positioning through holes of the wire harness sealing ring baffle and the mounting panel in sequence to form axial constraint and circumferential positioning.

[0024] A battery housing is also provided, including the aforementioned through-hole connector.

[0025] The beneficial effects of this utility model are as follows:

[0026] Automatic sealing is achieved through the interference fit between the wire harness sealing ring and the inner wall of the connector housing, eliminating the need for manual tightening and removing the risk of seal failure or stripping caused by uneven tightening force.

[0027] The axial limiting design of the wire harness sealing ring baffle can prevent the sealing ring from shifting and ensure stability under long-term vibration conditions.

[0028] The detachable harness locking clips facilitate installation and maintenance while preventing unwanted dragging and slippage of the harness.

[0029] The through-hole connector structure in this invention reduces manufacturing costs while significantly improving the sealing reliability of the lithium battery box and the durability of the wiring harness connection through a passive sealing mechanism. Attached Figure Description

[0030] Figures 1a-1b This is an exploded view of the overall structure of the through-hole connector of this utility model;

[0031] Figure 2 This is a schematic diagram of the assembled shell sealing ring of this utility model;

[0032] Figure 3 This is a schematic diagram of the structure of the wire harness sealing ring baffle after locking.

[0033] Figure 4 This is a schematic diagram of the connector and mounting panel of this utility model after they are fixed together.

[0034] Figure 5 This is a schematic diagram of the wire harness locking buckle after engagement.

[0035] Figure 6 This is a cross-sectional view of the through-hole connector of this utility model after installation;

[0036] Figure 7 This is a side view of the wire harness locking buckle of this utility model after installation.

[0037] Explanation of reference numerals in the attached drawings: 1. Mounting panel; 2. Wire harness sealing ring baffle; 3. Wire harness sealing ring; 4. Housing sealing ring; 5. Cable; 6. Wire harness locking buckle; 7. Connector housing; 8. Fastening bolt; 11. Fastening nut; 21. Clip; 61. Cover part; 62. Snap-fit ​​part; 63. Cover connection part; 71. Positioning post; 72. Sealing groove; 73. Locking structure; 74. Mounting hole; 75. Limiting part; 76. Annular groove; 731. Support part; 732. Locking part; 733. Support connection part. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0041] Reference Figure 1a and Figure 1b This utility model provides a through-hole connector, comprising:

[0042] The connector housing 7 has a sealing groove 72 that penetrates the connector housing 7, and the sealing groove 72 allows the cable 5 to pass through;

[0043] The wire harness sealing ring 3 is installed in the sealing groove 72 and is interference-fitted with the inner wall of the connector housing 7.

[0044] The wire harness sealing ring baffle 2 is installed on the connector housing 7 and located on one side of the sealing groove 72. The wire harness sealing ring baffle 2 axially limits the wire harness sealing ring 3.

[0045] The wire harness locking buckle 6 is detachably mounted on the connector housing 7 and located on the other side of the sealing groove 72. The wire harness locking buckle 6 locks and limits the portion of the cable 5 extending out of the sealing groove 72.

[0046] Specifically, in order to overcome the problems of existing gland connectors relying on manual tightening, poor sealing reliability, and easy failure due to improper operation, in this embodiment of the utility model, static sealing is achieved by using an interference fit between the wire harness sealing ring 3 and the connector housing 7, and the wire harness sealing ring baffle 2 reliably axially presses and limits the wire harness sealing ring 3 to prevent loosening or displacement during use. At the same time, a detachable wire harness locking buckle 6 is added to complete the fastening of the cable 5. This design not only ensures a long-term stable sealing effect, but also provides a simple and reliable wire harness fixing method, significantly improving the protection level of the battery box and the user's ease of operation.

[0047] Specifically, the aforementioned through-hole connector is used in the lithium battery box of two- and three-wheeled vehicles. It is usually installed at the pre-set through-hole of the box to achieve reliable connection and sealing of cable 5 from the inside of the box to the external environment.

[0048] The sealing groove 72 is integrally molded with the connector housing 7, as shown in the reference. Figure 1a and Figure 6 The sealing groove 72 has a limiting part 75 at its bottom, which is used to accurately position the wire harness sealing ring 3 and prevent it from moving axially during assembly and use.

[0049] The sealing groove 72 is configured one-to-one with the cable 5, so that each independent cable 5 has a dedicated sealing groove 72 for covering and sealing. This design significantly improves the targeting and reliability of the sealing, and effectively avoids the risk of mutual interference or single-point sealing failure that may occur when multiple cables 5 are in the same sealing cavity.

[0050] The wire harness sealing ring 3 is preferably made of SR240UOR silicone material, which has excellent temperature resistance, insulation and weather resistance. With the help of the high elasticity of silicone material and precision structural design, the wire harness sealing ring 3 can achieve bidirectional interference seal with both the inner wall of the connector housing 7 and the outer surface of the cable 5. Its specific assembly structure parameters are shown in Table 1 below:

[0051] Table 1 Assembly Parameters

[0052]

[0053] According to the assembly parameters shown in Table 1, the wire harness sealing ring 3 achieves a double interference fit through precise dimensional design. Specifically, the outer width of the wire harness sealing ring 3 (11.90±0.10mm) is larger than the inner diameter of the connector housing 7 (11.30±0.10mm), resulting in a radial compression of 0.5 to 0.7mm; simultaneously, the inner diameter of the wire harness sealing ring 3 (5.40±0.20mm) is smaller than the diameter of the cable 5 (6.4±0.2mm), resulting in a compression of 0.8 to 1.2mm. Based on the elastic properties of the silicone material and the allowable compression ratio range of 17.46% to 32.35% (nominal value is 24.62%), the wire harness sealing ring 3 can maintain a stable seal under tolerance fluctuations, ensuring a tight fit with the cable 5 and the connector housing 7, achieving a reliable bidirectional seal, and eliminating the need for manual tightening, thus avoiding the risk of seal failure or stripping due to uneven tightening force.

[0054] The wire harness sealing ring baffle 2 is mounted on the connector housing 7 via an integrally formed fastener, as shown in the reference. Figure 2 and Figure 3 The wire harness sealing ring baffle 2 has a through hole that is precisely aligned with the sealing groove 72 so that the cable 5 can pass through.

[0055] During installation, the cable 5 should be inserted into the through hole of the wire harness sealing ring baffle 2 and aligned with the sealing groove 72 on the connector housing 7. Then, it should be fixed to the connector housing 7 with fasteners to ensure that the wire harness sealing ring baffle 2 can completely cover the wire harness sealing ring 3 in the sealing groove 72 after installation.

[0056] After installation, the wire harness sealing ring baffle 2 will apply a uniform axial clamping force to the wire harness sealing ring 3 in the groove. This pressure will firmly restrict the wire harness sealing ring 3 in the sealing groove 72, thereby effectively preventing the wire harness sealing ring 3 from loosening and shifting under vibration or external force, and ensuring the long-term reliability of the seal.

[0057] Reference Figure 1a and Figure 1b The wire harness locking buckle 6 has an opening facing the cable 5 and is detachably fastened to the locking structure 73 of the connector housing 7. The locking structure 73 protrudes on the other side away from the sealing groove 72 and has an opening that matches the wire harness locking buckle 6 and also faces the cable 5.

[0058] The wire harness locking buckle 6 and the locking structure 73 engage with each other to form a mechanical locking mechanism that surrounds the cable 5. By uniformly applying radial locking force, the axial displacement of the cable 5 under complex working conditions is effectively suppressed, thereby completing the reliable fastening of the wire harness.

[0059] In a preferred embodiment of this utility model, the connector housing 7 is made of engineering plastic.

[0060] Specifically, in this embodiment of the invention, PA6+GF30 is preferably used as the shell material. This material exhibits excellent mechanical properties; its high strength and rigidity can stably withstand the locking operation and continuous vibrations during vehicle operation. Simultaneously, PA6+GF30 has good heat resistance, adapting to the high-temperature conditions that two- and three-wheeled vehicles may encounter in outdoor environments, and its physical properties are not easily degraded. This material also possesses excellent dimensional stability, with minimal deformation under varying temperature and humidity conditions, effectively ensuring the long-term tight fit between the shell and each sealing component, eliminating the risk of sealing problems caused by creep or loosening.

[0061] Overall, the PA6+GF30 achieves lightweight construction while fully meeting the stringent requirements of via connectors for robustness, durability, and reliable sealing.

[0062] As a preferred embodiment of this utility model Figure 1a , Figure 1b and Figure 2 The wire harness sealing ring baffle 2 is an integrated structure. It has a buckle 21 on the side facing the connector housing 7. The connector housing 7 has a slot. The buckle 21 engages with the slot to fix the wire harness sealing ring baffle 2 on the connector housing 7.

[0063] Specifically, in order to facilitate the installation and disassembly of the wire harness sealing ring baffle 2, in this embodiment of the utility model, the buckle 21 is designed as a barb shape, and the groove is designed as a rectangular through hole that matches the buckle 21; during assembly, the buckle 21 passes through the groove, and its barb structure and the rectangular through hole form a mechanical interlock to achieve reliable axial positioning of the wire harness sealing ring 3.

[0064] The arrangement of the buckle 21 and the slot can be flexibly adjusted according to the specific layout of the sealing groove 72 to adapt to the installation requirements under different configurations and ensure that a stable and reliable locking force can be provided in various expansion modes.

[0065] This design not only simplifies the installation process of the wire harness sealing ring baffle 2, but also ensures the long-term sealing reliability of the wire harness sealing ring 3 under vibration conditions through a dual mechanism of rigid constraint and stress maintenance. Specifically, it is manifested in the following ways:

[0066] 1) The barbed buckle 21 on the wire harness sealing ring baffle 2 forms a rigid interlock with the slot on the connector housing 7, which directly constrains the axial degree of freedom of the wire harness sealing ring baffle 2 and the wire harness sealing ring 3, thereby resisting the displacement caused by vibration and impact.

[0067] 2) Stable axial constraint prevents stress relaxation of wire harness sealing ring baffle 2 caused by loosening, so that the silicone wire harness sealing ring 3 can continuously use its elasticity and creep characteristics to compensate for wear and micro gaps, thereby maintaining stable fit and contact pressure of the sealing interface throughout the entire life cycle.

[0068] In addition, the buckle 21 can also be made into other shapes, such as mushroom head, ball or L shape, as long as it can form an effective insertion and locking with the corresponding shaped slot (such as blind hole, pit, etc.) on the connector housing 7.

[0069] As a preferred embodiment of this utility model, refer to Figure 4 , Figure 5 and Figure 7 The locking structure 73 adopts an integral molding design, including a support part 731 and a locking part 732. When the cable 5 passes through the sealing groove 72, the support part 731 supports the cable 5 from below, and the locking part 732 is located on the side of the cable 5.

[0070] The wire harness locking buckle 6 also adopts an integrated molding design, including a cover part 61 and a locking part 62. When the wire harness locking buckle 6 is fastened on the locking structure 73, the cover part 61 covers the top of the cable 5, and the locking part 62 engages with the locking part 732.

[0071] Specifically, in order to effectively resist the axial slippage of the cable 5, in this embodiment of the utility model, both the cover part 61 and the support part 731 are semi-circular openings. When the cable 5 passes through the sealing groove 72 and the wire harness locking buckle 6 is fastened on the locking structure 73, the cover part 61 and the support part 731 respectively hug the cable 5 from the upper and lower sides. At the same time, the engaging part 62 and the locking part 732 are tightly engaged, together forming a closed locking ring around the cable 5, which evenly locks the cable 5, thereby resisting the axial pull-out force of the cable 5.

[0072] More specifically, in addition to the aforementioned semi-circular opening, the cover portion 61 and the support portion 731 can also be designed as openings of other shapes, such as U-shaped, polygonal, or other irregular structures, to accommodate cables 5 of different diameters or outer sheath materials, ensuring sufficient contact surface and clamping force while avoiding stress concentration damage to the cable 5.

[0073] As a preferred embodiment of this utility model, refer to Figure 6 The opening of the wire harness locking buckle 6 is provided with an inner rib A, and the opening of the locking structure 73 is provided with an inner rib B of the connector housing. When the wire harness locking buckle 6 is fastened on the locking structure 73, the inner rib A of the wire harness locking buckle and the inner rib B of the connector housing cooperate to clamp the cable 5.

[0074] Specifically, in order to further improve the locking and anti-slip effect of the cable 5 and adapt to vibration conditions, in this embodiment of the utility model, the inner rib A of the wire harness locking buckle and the inner rib B of the connector housing are both raised ribs. When the wire harness locking buckle 6 is fastened, the two rows of ribs form local multi-point compression on the circumference of the cable 5, thereby increasing the contact pressure and friction, and effectively preventing the cable 5 from slipping or loosening under vibration conditions.

[0075] As a preferred embodiment of this utility model, refer to Figure 2 and Figure 6 The through-hole connector also includes a housing sealing ring 4, which is made of silicone and is fitted into an annular groove 76 on the outer periphery of the sealing groove 72. The lower surface of the housing sealing ring 4 is in contact with the surface of the connector housing 7, and the upper surface of the housing sealing ring 4 protrudes axially from the surface of the connector housing 7.

[0076] Specifically, in order to further ensure the sealing performance between the housing and the external mounting structure, in this embodiment of the invention, reference is made to... Figure 6 The housing sealing ring 4 has a rectangular cross-section, with its width slightly larger than the width of the annular groove 76. After the housing sealing ring 4 is fitted into the annular groove 76, its lower surface fits against the surface of the connector housing 7, while its upper surface protrudes axially from the surface of the connector housing 7 to form a compressible seal. When the connector is finally locked to the external mounting structure, this protruding compressible seal undergoes elastic deformation under pressure, generating continuous radial and axial sealing forces, tightly filling the assembly gap between the connector housing 7 and the external structure, thereby achieving an efficient and reliable static seal.

[0077] More specifically, in practical applications, silicone material of model TYC231-40G can be selected. This material is not only soft, highly elastic, and has a high elongation, but also has excellent resistance to high and low temperatures, weather resistance, and electrical insulation properties, which can meet the long-term sealing requirements under complex working conditions.

[0078] In a preferred embodiment of this utility model, the main structure of the through-hole connector is composed of a connector housing 7, a wire harness sealing ring baffle 2, a wire harness sealing ring 3, a housing sealing ring 4, and a wire harness locking buckle 6. To achieve standardized and stable installation of this through-hole connector on the battery box, refer to... Figure 1a and Figure 4 It also includes a mounting panel 1, and the connector housing 7 is mounted on the mounting panel 1 by fastening bolts 8.

[0079] Specifically, in this embodiment of the invention, the mounting panel 1 has a through hole corresponding to the sealing groove 72 of the connector housing 7, for the cable 5 to pass through; meanwhile, referring to Figure 1b The mounting panel 1 is provided with a fastening nut 11 that matches the fastening bolt 8. During assembly, the fastening bolt 8 passes through the mounting hole 74 on the connector housing 7 and engages with the fastening nut 11, thereby reliably fixing the entire connector to the mounting panel 1.

[0080] More specifically, to further balance installation stability, sealing uniformity, and cost control, in this embodiment of the invention, the mounting holes 74 are arranged diagonally on the connector housing 7, and connected to the mounting panel 1 by two fastening bolts 8. This symmetrical, staggered layout can form a uniform clamping force on the mounting surface with a minimum number of fasteners, ensuring that the housing sealing ring 4 is smoothly compressed to establish an effective seal, significantly simplifying the assembly process, and reducing material and management costs.

[0081] During installation, first pass the cable 5 through the through hole on the mounting panel 1, then align the mounting hole 74 of the connector housing 7 with the fastening nut 11 on the mounting panel 1, and finally tighten the two fastening bolts 8 to complete the secure connection between the through-hole connector and the mounting panel 1. During this process, the housing sealing ring 4 is subjected to axial compression, and its protruding compressible sealing part undergoes elastic deformation. On the one hand, it fits tightly with the mounting panel 1 with continuous restoring force, and on the other hand, it causes the housing sealing ring 4 to expand uniformly in the circumference, fully filling the gap around the annular groove 76, thereby building multiple sealing barriers in both the axial and radial directions, achieving efficient blocking of moisture and dust.

[0082] In a preferred embodiment of this utility model, the fastening process is quantitatively designed to ensure connection strength while protecting key components.

[0083] Specifically, in this embodiment of the utility model, the fastening bolt 8 is selected from the common M4 specification, and its installation torque is controlled within the range of 2.2 N·m to 2.8 N·m. This quantitative torque design can ensure sufficient fastening strength to prevent the through-hole connector from loosening in a vibration environment, and can also avoid damage to the threads or crushing of the housing seal ring 4 due to excessive torque.

[0084] In a preferred embodiment of this utility model, to ensure precise alignment and reliable fixation between the wire harness sealing ring baffle 2 and the mounting panel 1, refer to... Figure 1b Both the wire harness sealing ring baffle 2 and the mounting panel 1 are provided with positioning through holes. The connector housing 7 extends to the side facing the wire harness sealing ring baffle 2 and is provided with a positioning post 71. The positioning post 71 passes through the positioning through holes of the wire harness sealing ring baffle 2 and the mounting panel 1 in sequence.

[0085] Specifically, in this embodiment of the invention, the number, position, and size of the positioning posts 71 are dynamically optimized based on the geometry and internal structure of the connector housing 7. For example, for a connector housing 7 that is rectangular in shape and has a sealing groove 72 in the middle, the positioning posts 71 are positioned symmetrically at the upper and lower ends of the housing, and the positions of the positioning through holes on the wire harness sealing ring baffle 2 and the mounting panel 1 correspond precisely to them, thereby achieving fast and accurate assembly and effectively resisting torsional torque during use.

[0086] This design allows for precise pre-positioning of the connector housing 7, wire harness sealing ring baffle 2, and mounting panel 1 before the fastening bolts 8 are tightened, effectively preventing circumferential rotation or lateral misalignment of the components during the final tightening process.

[0087] As a preferred embodiment of this utility model, the through-hole connector has good compatibility and scalability, and can stably adapt to various cable configurations from single-core to multi-core, ensuring reliable sealing and locking performance. The core of achieving this function lies in the systematic matching and adjustment of the core components according to the number of cables 5, specifically including key design parameters such as the number of sealing grooves 72, the number of wire harness sealing rings 3, the number of cable through holes on the wire harness sealing ring baffle 2, the number of support parts 731 in the locking structure 73, the number of cover parts 61 on the wire harness locking buckle 6, and the number of cable through holes on the mounting panel 1.

[0088] Specifically, in this embodiment of the utility model, taking a two-core cable 5 as an example, refer to... Figure 1a and Figure 1b The connector housing 7 has two parallel sealing grooves 72, each containing a wire harness sealing ring 3; the wire harness sealing ring baffle 2 has two corresponding cable through holes to achieve synchronous compression and sealing of the two wire harness sealing rings 3; see reference Figure 4 The locking structure 73 has two supporting parts 731, which are connected by an integrally formed supporting connecting part 733; the wire harness locking buckle 6 has two corresponding covering parts 61, which are connected by an integrally formed covering connecting part 63; see reference Figure 1a and Figure 1b The mounting panel 1 has two through holes that match the sealing groove 72.

[0089] Reference Figure 5 and Figure 7 After assembly, the supporting connection 733 and the cover connection 63 engage with each other, forming a solid isolation barrier between the two cables 5, ensuring reliable insulation and uniform pressure between the cables 5, thereby providing independent and reliable sealing and locking for each cable 5.

[0090] Therefore, if it is necessary to adapt to single-core cable 5, the quantity of each of the above components should be adjusted to one set; if it is necessary to expand to more cores, the quantity and layout of all the above components should be multiplied and arrayed according to the target number of cores, so that modular and flexible expansion can be achieved while maintaining the same working principle.

[0091] Furthermore, the through-hole connector boasts excellent cable material compatibility, widely adaptable to cables with various sheath materials such as silicone and cross-linked polyolefin. This feature ensures that the through-hole connector maintains stable sealing performance and mechanical reliability over a long period, even in harsh environments such as wide temperature ranges, high humidity, and chemical corrosion.

[0092] As a preferred embodiment of this utility model, refer to Figures 2 to 6 The installation process for this via connector mainly includes the following steps:

[0093] Step 1: Fit the housing sealing ring 4 into the annular groove 76 of the connector housing 7;

[0094] Step 2: Pass the cable 5 through the sealing groove 72 of the connector housing 7, the wire harness sealing ring 3, and the corresponding through hole on the wire harness sealing ring baffle 2 in sequence.

[0095] Step 3: Fix the wire harness sealing ring baffle 2 to the connector housing 7, so that the wire harness sealing ring 3 is compressed and stably positioned in the sealing groove 72;

[0096] Step 4: Use fastening bolts 8 to secure the assembled connector to the mounting panel 1.

[0097] Step 5: After adjusting the extension length of cable 5, fasten the wire harness locking buckle 6 so that it is fully engaged with the locking structure 73, and evenly tighten cable 5 to complete the installation.

[0098] In summary, this utility model provides a through-hole connector that achieves primary sealing through the interference fit between the wire harness sealing ring 3 and the connector housing 7. This, combined with the compressible sealing portion of the housing sealing ring 4, forms a double waterproof barrier. The wire harness sealing ring baffle 2 ensures the axial positioning of the wire harness sealing ring 3, preventing displacement due to vibration. Furthermore, the wire harness locking buckle 6 uses a mechanical snap-fit ​​structure instead of traditional threaded locking, eliminating the risk of seal failure caused by variations in manual tightening force. This design retains the cost advantages of gland connectors while significantly improving sealing reliability through standardized installation procedures and an adjustment-free locking mechanism. It is particularly suitable for price-sensitive applications requiring long-term stable sealing in two- and three-wheeled vehicle lithium battery applications.

[0099] This utility model also provides a battery housing, including the aforementioned through-hole connector.

[0100] Specifically, in this embodiment of the invention, the through-hole connector can be fixedly installed at a pre-set through-hole on the side wall or end cover of the battery box. One end of the cable 5 inside the connector is connected to the lithium battery pack inside the box, and the other end extends through the through-hole connector to the outside of the box for connecting to the vehicle's control system or charging interface. This through-hole connector not only provides a robust mechanical connection point and reliable through-hole sealing for the cable 5, effectively preventing external moisture, dust, and other contaminants from entering the box and ensuring the working safety and environmental isolation of the lithium battery, but its modular design also facilitates the installation and subsequent maintenance of the cable 5.

[0101] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A through-hole connector, characterized in that, include: A connector housing (7) is provided with a sealing groove (72) that penetrates the connector housing (7) and the sealing groove (72) allows the cable (5) to pass through; The wire harness sealing ring (3) is installed in the sealing groove (72) and is interference-fitted with the inner wall of the connector housing (7); A wire harness sealing ring baffle (2) is installed on the connector housing (7) and located on one side of the sealing groove (72). The wire harness sealing ring baffle (2) axially limits the wire harness sealing ring (3). A wire harness locking buckle (6) is detachably mounted on the connector housing (7) and located on the other side of the sealing groove (72). The wire harness locking buckle (6) locks and limits the portion of the cable (5) extending out of the sealing groove (72).

2. A through-hole connector according to claim 1, characterized in that, The connector housing (7) is provided with a locking structure (73), which protrudes from the other side of the sealing groove (72) and has an opening facing the cable (5); The wire harness locking buckle (6) is detachably fastened to the locking structure (73).

3. A through-hole connector according to claim 2, characterized in that, The wire harness locking buckle (6) has an opening facing the cable (5), and the opening of the wire harness locking buckle (6) is provided with a wire harness locking buckle inner rib (A); The locking structure (73) has an inner rib (B) of the connector housing at its opening. When the wire harness locking buckle (6) is fastened to the locking structure (73), the inner rib (A) of the wire harness locking buckle cooperates with the inner rib (B) of the connector housing to clamp the cable (5).

4. A through-hole connector according to claim 2, characterized in that, The locking structure (73) includes a supporting part (731) and a locking part (732). When the cable (5) passes through the sealing groove (72), the supporting part (731) supports the cable (5) from below, and the locking part (732) is located on the side of the cable (5).

5. A through-hole connector according to claim 4, characterized in that, The wire harness locking buckle (6) includes a cover portion (61) and a locking portion (62). When the wire harness locking buckle (6) is fastened to the locking structure (73), the cover portion (61) covers the top of the cable (5), and the locking portion (62) engages with the locking portion (732).

6. A through-hole connector according to claim 1, characterized in that, It also includes a housing sealing ring (4), which is fitted inside the annular groove (76) on the outer periphery of the sealing groove (72). The lower surface of the housing sealing ring (4) is in contact with the surface of the connector housing (7), and the upper surface of the housing sealing ring (4) axially protrudes from the surface of the connector housing (7).

7. A through-hole connector according to claim 1, characterized in that, The wire harness sealing ring baffle (2) has a buckle (21) on the side facing the connector housing (7), and the connector housing (7) has a slot. The buckle (21) engages with the slot to fix the wire harness sealing ring baffle (2) on the connector housing (7).

8. A through-hole connector according to claim 1, characterized in that, It also includes a mounting panel (1), on which the connector housing (7) is mounted by fastening bolts (8).

9. A through-hole connector according to claim 8, characterized in that, Both the wire harness sealing ring baffle (2) and the mounting panel (1) are provided with positioning through holes. The connector housing (7) extends to the side of the wire harness sealing ring baffle (2) and is provided with a positioning post (71). The positioning post (71) passes through the positioning through holes of the wire harness sealing ring baffle (2) and the mounting panel (1) in sequence.

10. A battery housing, characterized in that, Includes a via connector as described in any one of claims 1-9.

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