Connector and battery pack
By using threaded connections and sealing designs for conductive posts and busbars, the problems of unstable connections and excessive size of high-voltage connectors are solved, achieving stable and safe current conduction and adapting to narrow space arrangements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FARASIS ENERGY ZHEN JIANG CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-06-02
AI Technical Summary
The plug-in design of existing high-voltage connectors leads to unstable connections, high contact resistance, easy loosening, safety risks, and large size, making them unsuitable for use in confined spaces.
The system uses conductive posts and conductive busbars connected by threads, combined with sealing rings and threaded fasteners, to achieve stable fastening, reduce contact resistance, and adapt to narrow space layouts.
It provides stable fastening force, reduces contact resistance, improves safety, reduces connector size, adapts to narrow space layouts, and solves the problems of unstable connection and excessive size.
Smart Images
Figure CN224318641U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of battery equipment, and in particular to a connector and a battery pack. Background Technology
[0002] Existing high-voltage connectors are all plug-in designs, with their core components being spring-loaded copper contacts that make electrical connections. This connection structure relies primarily on the elastic deformation of the copper material to apply spring force, allowing the male and female ends of the connector to mate. However, after prolonged use, the elastic force of the material gradually diminishes, causing problems such as unstable connections, high contact resistance, and a tendency to loosen. This, in turn, leads to significant temperature rise at the electrical connection point, potentially causing safety risks such as burning, and severely impacting its usability. Utility Model Content
[0003] The main objective of this invention is to provide a connector that solves the technical problem of unstable connection in existing plug-in connectors.
[0004] To achieve the above-mentioned utility model objectives, the first aspect of this utility model proposes a connector.
[0005] A connector, comprising:
[0006] The main body has a first opening on one side and a second opening on the bottom, with the first opening communicating with the second opening;
[0007] A conductive busbar, wherein the conductive busbar is disposed within the first opening;
[0008] A conductive post is disposed within a second opening. One end of the conductive post has a first threaded hole for threaded connection with the battery pack housing. The other end of the conductive post is connected to the conductive busbar.
[0009] A first threaded fastener is provided through the main body and is used for the threaded connection with the battery pack housing.
[0010] In one embodiment, the main body includes a base and a cover, the base and the cover being detachably connected, the base having a first opening on one side, and the base having a second opening.
[0011] In one embodiment, the first threaded fastener has a second threaded hole at one end facing the cover, and a third threaded hole at the other end away from the cover, the third threaded hole being used for threaded connection with the battery pack housing.
[0012] The connector also includes a second threaded fastener. The cover has a first mounting hole, the second threaded fastener passes through the first mounting hole, and is threadedly connected to the second threaded hole.
[0013] In one embodiment, a spacer is provided inside the first threaded fastener, the spacer being located between the second threaded hole and the third threaded hole.
[0014] In one embodiment, the connector includes a third threaded fastener, one end of the conductive bar has a second mounting hole, and the other end of the conductive post passes through the second mounting hole and is threadedly connected to the third threaded fastener.
[0015] In one embodiment, the connector further includes a first sealing ring disposed between the base and the cover, and the first sealing ring is disposed around the outer edge of the base.
[0016] In one embodiment, the cover has a first recess on the side facing the base, and the base has a second recess on the side facing the cover. The first recess and the second recess are correspondingly provided, and the first recess and the second recess are adapted to the first sealing ring, and the first sealing ring is disposed between the first recess and the second recess.
[0017] In one embodiment, the connector further includes a second sealing ring disposed on the bottom surface of the base away from the cover, and the second sealing ring is disposed around the outer edge of the base.
[0018] In one embodiment, the base has a third recess on the side away from the cover, the second sealing ring is adapted to the third recess, and the second sealing ring is disposed in the third recess.
[0019] In one embodiment, the connector further includes a sealing sleeve that is fitted around the outer periphery of the conductive bar and disposed on the sidewall of the first opening.
[0020] The second aspect of this utility model provides a battery pack, including a housing and the aforementioned connector, wherein the connector is connected to the housing.
[0021] Beneficial effects:
[0022] This utility model discloses a connector comprising a body, a conductive busbar, a conductive post, and a first threaded fastener. A first opening is provided on one side of the body, and a second opening is provided at the bottom of the body, with the first and second openings communicating with each other. The conductive busbar is disposed within the first opening. The conductive post is disposed within the second opening, with one end of the conductive post having a first threaded hole for threaded connection with the battery pack housing; the other end of the conductive post is connected to the conductive busbar. The first threaded fastener passes through the body and is used for threaded connection with the battery pack housing. Compared to existing methods that rely on the elastic deformation of copper to apply elastic force, this structure provides a more stable and durable fastening force, effectively avoiding connection instability caused by the decay of material elasticity. Due to the improved connection stability, the contact between the conductive busbar and the conductive post, as well as between the connector and the battery pack housing, is tighter, reducing the resistance during current conduction and significantly lowering contact resistance, thereby improving the safety of the connector and the battery pack. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the connector structure according to an embodiment of the present invention.
[0024] Figure 2 This is a structural schematic diagram of a connector (hidden cover) according to an embodiment of the present invention.
[0025] Figure 3 This is a structural schematic diagram of the connector (hidden cover) of one embodiment of the present invention from another angle.
[0026] Figure 4 This is a cross-sectional structural schematic diagram of a connector (hidden cover) according to an embodiment of the present invention.
[0027] Figure 5 This is a schematic diagram of the base according to an embodiment of the present invention.
[0028] Figure 6 This is a structural schematic diagram of the base from another angle according to an embodiment of the present invention.
[0029] Figure 7 This is a schematic diagram of the structure of the cover body according to an embodiment of the present utility model.
[0030] Figure 8 This is a schematic diagram of the structure of a conductive column according to an embodiment of the present invention.
[0031] Figure 9 This is a schematic diagram of the structure of a conductive busbar according to an embodiment of the present invention.
[0032] Figure 10 This is a structural schematic diagram of the connector and battery pack housing according to an embodiment of the present invention.
[0033] in:
[0034] 10. Connector; 20. Housing;
[0035] 100. Main body; 110. First opening; 120. Second opening; 130. Base; 131. Second recess; 132. Third recess; 140. Cover; 141. First mounting hole; 142. First recess;
[0036] 200, Conductive busbar; 210, Second mounting hole;
[0037] 300, conductive post; 310, first threaded hole; 320, support platform; 330, first connecting part; 340, second connecting part;
[0038] 400, First threaded fastener; 410, Second threaded hole; 420, Third threaded hole; 430, Spacer;
[0039] 500. Second threaded fastener;
[0040] 600. Third threaded fastener;
[0041] 710. First sealing ring; 720. Second sealing ring;
[0042] 800, sealing sleeve.
[0043] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0044] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
[0045] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.
[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0048] In some embodiments, such as Figures 1 to 5 and Figure 10 As shown, a connector 10 includes a body 100, a conductive busbar 200, a conductive post 300, and a first threaded fastener 400. A first opening 110 is formed on one side of the body 100, and a second opening 120 is formed at the bottom of the body 100, with the first opening 110 communicating with the second opening 120. The conductive busbar 200 is disposed within the first opening 110. The conductive post 300 is disposed within the second opening 120, with one end of the conductive post 300 having a first threaded hole 310 for threaded connection with the housing 20 of the battery pack, and the other end of the conductive post 300 connected to the conductive busbar 200. The first threaded fastener 400 passes through the body 100 and is used for threaded connection with the housing 20 of the battery pack.
[0049] Compared to existing methods that rely on the elastic deformation of copper to apply elastic force, this structure provides a more stable and durable fastening force, effectively avoiding connection instability caused by the decay of material elasticity. Due to the improved connection stability, the contact between the conductive busbar 200 and the conductive post 300, as well as between the connector 10 and the battery pack housing 20, is tighter, reducing resistance during current conduction and significantly lowering contact resistance, thereby improving the safety of the connector 10 and the battery pack.
[0050] The copper contact spring-loaded connection of the connector 10 in related technologies typically cannot exceed 50 mating cycles. Furthermore, after prolonged use, the elasticity of the copper contacts weakens over time, leading to increased internal resistance, which in turn causes temperature rise and the risk of ablation. This connector 10 solves the high-temperature risk caused by unstable connections resulting from repeated mating cycles in related technologies. Through the reliability of the threaded connection, it completely resolves the limitations of traditional high-voltage connections, such as the limitation on the number of mating cycles and the risk of high temperatures, enabling unlimited assembly and disassembly.
[0051] In related technologies, the male and female connectors use a plug-in connection, resulting in a complex sealing design and a large connector 10 size. This occupies a significant amount of space when installed externally on the battery pack, hindering the design of electrical connections in confined spaces. Furthermore, the high-voltage connectors 10 in related technologies require high-voltage cables at their ends. Due to the high current in electric vehicles, these high-voltage cables have a large diameter, making bending and arrangement difficult or impossible in confined spaces. The connector 10 of this application eliminates the need for a plug-in connection, reducing its size and space requirements.
[0052] In some embodiments, the main body 100 includes a base 130 and a cover 140. A first opening 110 is formed on one side of the base 130, and a second opening 120 is formed on the base 130. When the base 130 is placed horizontally, the first opening 110 is formed along the horizontal direction of the base 130, and the second opening 120 is formed along the vertical direction of the base 130. Figure 5 and Figure 6 As shown, a second opening 120 is provided along the height direction of the base 130.
[0053] Specifically, the base 130 serves as the basic support structure for the conductive post 300 and the conductive busbar 200. The base 130 can be square in shape.
[0054] Specifically, such as Figure 7 As shown, the cover 140 can be a square structure. The cover 140 is positioned above the base 130. The cover 140 can serve as the top cover of the base 130. The cover 140 can protect and seal the internal structure of the base 130, preventing dust, impurities, etc. from entering the interior of the base 130 and affecting the normal operation of components such as the conductive busbar 200 and the conductive post 300.
[0055] Specifically, the base 130 and the cover 140 are detachably connected. The base 130 and the cover 140 can be connected by threads or snaps.
[0056] like Figure 5As shown, in some embodiments, the first threaded fastener 400 has a second threaded hole 410 at one end facing the cover 140, and a third threaded hole 420 at the other end away from the cover 140. The third threaded hole 420 is used for threaded connection with the battery pack housing 20. The connector 10 also includes a second threaded fastener 500. The cover 140 has a first mounting hole 141, and the second threaded fastener 500 passes through the first mounting hole 141 and is threadedly connected to the second threaded hole 410.
[0057] It should be noted that the third threaded hole 420 of the first threaded fastener 400 is connected to the battery pack housing 20, thereby fixing the base 130 to the battery pack housing 20. The second threaded fastener 500 is connected to the second threaded hole 410 of the first threaded fastener 400, thereby fixing the cover 140 to the base 130. This structure enhances the connection stability between the cover 140 and the base 130 and the battery pack housing 20, that is, the connection stability between the connector 10 and the battery pack. It can effectively prevent the connector 10 from separating from the battery pack due to vibration, shaking or external impact during use, ensuring the stability and safety of current conduction.
[0058] like Figure 5 As shown, specifically, a spacer 430 is provided within the first threaded fastener 400. The spacer 430 is located between the second threaded hole 410 and the third threaded hole 420. The spacer 430 ensures that the second threaded fastener 500 is threadedly engaged with the second threaded hole 410, preventing the second threaded fastener 500 from entering the third threaded hole 420. The spacer 430 also ensures that the battery pack housing 20, which mates with the third threaded hole 420, enters the second threaded hole 410.
[0059] It should be noted that the isolating element 430 needs to possess a certain degree of hardness and stability to ensure that it will not deform or be damaged when subjected to the pressure and friction generated during threaded connection, thereby continuously performing its isolating function. When the second threaded fastener 500 is screwed into the second threaded hole 410, the isolating element 430, through its position and structure, prevents the second threaded fastener 500 from extending further into the third threaded hole 420, ensuring that the second threaded fastener 500 can only be threaded within the second threaded hole 410 and will not interfere with the use of the third threaded hole 420.
[0060] Specifically, the first threaded fastener 400 is installed through the cover 140 along its height direction.
[0061] Specifically, the first threaded fastener 400 can be a nut.
[0062] Specifically, multiple first threaded fasteners 400 can be provided. These multiple first threaded fasteners 400 are disposed on the outer periphery of the base 130. The multiple first threaded fasteners 400 form a circumferential connection system around the outer periphery of the base 130, providing multiple connection points between the base 130 and the cover 140 and the battery pack housing 20. This multi-directional connection method increases the stability of the connection between the base 130 and the cover 140 and the battery pack housing 20, reducing the possibility of relative displacement and loosening caused by vibration, impact, or external forces.
[0063] Specifically, when the base 130 has a square structure, four first threaded fasteners 400 can be provided. These four threaded fasteners are positioned at the four opposite corners of the base 130. The square structure exhibits a high degree of geometric symmetry. This symmetrical arrangement ensures that the connection strength and stability of the base 130 remain consistent in all directions, thereby further improving the stability and reliability of the connection.
[0064] like Figure 2 and Figure 9 As shown, in some embodiments, the connector 10 includes a third threaded fastener 600. One end of the conductive bus 200 has a second mounting hole 210, and the other end of the conductive post 300 passes through the second mounting hole 210 and is threadedly connected to the third threaded fastener 600. The use of the third threaded fastener 600 can provide reliable mechanical fastening force, effectively resist external vibration and impact, ensure that the connection between the conductive bus 200 and the conductive post 300 remains stable, and guarantee the reliability of the electrical connection.
[0065] like Figure 8 As shown, specifically, the conductive post 300 includes a support platform 320, a first connecting portion 330, and a second connecting portion 340. The support platform 320 is connected to the inner wall of the second opening 120, so that the support platform 320 is fixedly mounted on the base 130. Both the first connecting portion 330 and the second connecting portion 340 are connected to the support platform 320. The first connecting portion 330 is positioned towards the cover 140. The second connecting portion 340 is positioned away from the cover 140. Specifically, the first connecting portion 330 of the conductive post 300 passes through the second mounting hole 210. The second connecting portion 340 is provided with a first threaded hole 310.
[0066] Specifically, the conductive post 300 can be made of copper.
[0067] Specifically, the conductive busbar 200 can be a copper busbar. As a connecting component between connectors 10, the copper busbar's routing allows for high-voltage design within confined spaces. The connector 10 of this application solves the problems caused by the difficulty of bending power cables when using conventional connectors 10, especially in connection designs within confined spaces. By using an external copper busbar, a high-voltage connection method without bending difficulties or space limitations is achieved. Furthermore, by adjusting the cross-sectional area of the copper busbar, the overcurrent requirements of the battery system can be efficiently matched without being limited by the external connection cable diameter (common diameters: 502mm, 702mm, 952mm, 1202mm, etc.).
[0068] like Figure 2 As shown, in some embodiments, the connector 10 further includes a first sealing ring 710, which is disposed between the base 130 and the cover 140, and surrounds the outer edge of the base 130. The first sealing ring 710 is used to seal the gap between the base 130 and the cover 140. The first sealing ring 710 can be made of an elastic material such as rubber, and has good elastic deformation capability. When the base 130 and the cover 140 are assembled together, a certain pressure is applied to the first sealing ring 710, causing it to undergo elastic deformation. This deformation allows the first sealing ring 710 to fit tightly against the contact surfaces of the base 130 and the cover 140, filling the gap between the base 130 and the cover 140, thereby preventing the leakage or entry of liquids, gases, or solid particles, and achieving a sealing function.
[0069] Specifically, the first sealing ring 710 has a third mounting hole, and the second threaded fastener 500 passes through the third mounting hole.
[0070] Specifically, the first sealing ring 710 and the cover 140 are integrally formed.
[0071] like Figure 5 and Figure 7 As shown, specifically, the cover 140 has a first recess 142 on the side facing the base 130, and the base 130 has a second recess 131 on the side facing the cover 140. The first recess 142 and the second recess 131 are correspondingly arranged. The first recess 142 and the second recess 131 are adapted to the first sealing ring 710, and the first sealing ring 710 is disposed between the first recess 142 and the second recess 131.
[0072] It should be noted that the first recess 142 and the second recess 131 provide a precise installation position and space for the first sealing ring 710, ensuring that the first sealing ring 710 can be correctly positioned during assembly and can fully contact the contact surfaces of the cover 140 and the base 130. Positioning the first sealing ring 710 between the first recess 142 and the second recess 131 restricts its displacement and deformation during operation, allowing it to maintain a stable seal even under external forces such as vibration and impact. The first recess 142 and the second recess 131 also prevent the first sealing ring 710 from shifting or twisting during installation and use, reducing the risk of seal failure and improving the sealing effect between the base 130 and the cover 140.
[0073] like Figure 3 As shown, in some embodiments, the connector 10 further includes a second sealing ring 720, which is disposed on the bottom surface of the base 130 away from the cover 140 and surrounds the outer edge of the base 130. The second sealing ring 720 can seal the gap between the base 130 and the battery pack housing 20. The second sealing ring 720 can be made of an elastic material such as rubber. When the base 130 and the battery pack housing 20 are assembled together, a certain pressure is applied to the second sealing ring 720, causing it to deform elastically. This deformation allows the second sealing ring 720 to fit tightly against the contact surfaces of the base 130 and the battery pack housing 20, filling the gap between the base 130 and the battery pack housing 20, thereby preventing the leakage or entry of liquids, gases, or solid particles, and achieving a sealing function.
[0074] like Figure 6 As shown, specifically, a third recess 132 is provided on the side of the base 130 away from the cover 140, and a second sealing ring 720 is adapted to the third recess 132, and the second sealing ring 720 is disposed in the third recess 132.
[0075] It should be noted that the third recess 132 provides a precise installation position and space for the second sealing ring 720, ensuring that the second sealing ring 720 can be correctly positioned during assembly and can fully contact the contact surfaces of the base 130 and the battery pack housing 20. Placing the second sealing ring 720 within the third recess 132 restricts its displacement and deformation during operation, allowing it to maintain a stable seal even under external forces such as vibration and impact.
[0076] like Figure 2As shown, in some embodiments, the connector 10 further includes a sealing sleeve 800, which is fitted around the outer periphery of the conductive busbar 200 and disposed on the sidewall of the first opening 110. The sealing sleeve 800 can be made of materials with a certain degree of elasticity and flexibility, such as rubber or silicone. The sealing sleeve 800 can form a physical barrier between the conductive busbar 200 and the external environment, preventing dust, moisture, chemicals, and other impurities from directly contacting the conductive busbar 200, avoiding problems such as corrosion and short circuits caused by impurities, and ensuring the normal operation of the conductive busbar 200.
[0077] Specifically, the sealing sleeve 800 is positioned in contact with the first sealing ring 710.
[0078] like Figure 10 As shown, in another embodiment, a battery pack includes a housing and the aforementioned connector 10, the connector 10 being connected to the housing 20.
[0079] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.
Claims
1. A connector, characterized in that, include: The main body has a first opening on one side and a second opening on the bottom, with the first opening communicating with the second opening; A conductive busbar, wherein the conductive busbar is disposed within the first opening; A conductive post is disposed within a second opening. One end of the conductive post has a first threaded hole for threaded connection with the battery pack housing. The other end of the conductive post is connected to the conductive busbar. A first threaded fastener is provided through the main body and is used for threaded connection with the casing of the battery pack.
2. The connector according to claim 1, characterized in that, The main body includes a base and a cover, the base and the cover are detachably connected, the base has a first opening on one side and a second opening on the base.
3. The connector according to claim 2, characterized in that, The first threaded fastener has a second threaded hole at one end facing the cover, and a third threaded hole at the other end away from the cover. The third threaded hole is used for threaded connection with the battery pack housing. The connector also includes a second threaded fastener. The cover has a first mounting hole, the second threaded fastener passes through the first mounting hole, and is threadedly connected to the second threaded hole.
4. The connector according to claim 3, characterized in that, The first threaded fastener has an isolation element located between the second threaded hole and the third threaded hole.
5. The connector according to claim 1, characterized in that, The connector includes a third threaded fastener. One end of the conductive bar has a second mounting hole, and the other end of the conductive post passes through the second mounting hole and is threadedly connected to the third threaded fastener.
6. The connector according to claim 2, characterized in that, The connector further includes a first sealing ring disposed between the base and the cover, and the first sealing ring is disposed around the outer edge of the base.
7. The connector according to claim 6, characterized in that, The cover has a first recess on the side facing the base, and the base has a second recess on the side facing the cover. The first recess and the second recess are correspondingly provided. The first recess and the second recess are adapted to the first sealing ring, and the first sealing ring is disposed between the first recess and the second recess.
8. The connector according to claim 2, characterized in that, The connector further includes a second sealing ring, which is disposed on the bottom surface of the base away from the cover and surrounds the outer edge of the base.
9. The connector according to claim 8, characterized in that, The base has a third recess on the side away from the cover, and the second sealing ring is adapted to the third recess and is disposed in the third recess.
10. The connector according to claim 1, characterized in that, The connector further includes a sealing sleeve, which is fitted around the outer periphery of the conductive bar and disposed on the side wall of the first opening.
11. A battery pack, characterized in that, It includes a housing and a connector as described in any one of claims 1 to 10, wherein the connector is connected to the housing.