Battery cluster frame grounding device of new energy locomotive

Abstract

The utility model discloses a new energy locomotive's battery cluster frame grounding device, including frame, lead through mechanism, equipotential mechanism and grounding mechanism, be equipped with the containing cavity for placing battery package on the frame, the lead through mechanism includes lead through bolt, the lead through bolt is welded on the frame, the lead through bolt is located in the containing cavity, the battery package is connected with the lead through bolt electricity, the equipotential mechanism includes equipotential bolt, the equipotential bolt is connected in the side of frame, and the equipotential bolt on adjacent frame is connected electricity, the grounding mechanism includes ground bolt and ground row, the ground bolt is connected in the top or bottom of frame, and the ground bolt is connected with the ground row on the locomotive electricity, the beneficial effect of the utility model is: equipotential mechanism passes through equipotential bolt and cross frame conductive connection, solved the electric conduction interruption problem of the multiple frame splicing.

Description

Technical Field

[0001] This utility model relates to the field of new energy locomotives, specifically to a battery cluster grounding device for new energy locomotives. Background Technology

[0002] On a battery-powered locomotive, multiple battery boxes are typically mounted on a metal frame, which is then fixed to the locomotive body. Reliable grounding is crucial for ensuring system safety.

[0003] Chinese utility model patent CN220553606U discloses a battery pack grounding structure, including a frame body for placing the battery pack and the battery pack. The frame body has a mounting surface. The battery pack is inserted into the frame body along the normal direction of the mounting surface. The frame body has a fixing member on the mounting surface to prevent the battery pack from falling out. The fixing member is fixedly connected to the frame body and the battery pack and is electrically connected. The frame body has a first preset fitting position for fitting the fixing member. The frame body is made of conductive material. The frame body is coated with an insulating coating outside the first preset fitting position. The battery pack includes a lower part of the battery pack. The lower part of the battery pack has a second preset fitting position for fitting the fixing member. The lower part of the battery pack is coated with an insulating coating outside the second preset fitting position. The fixing member is fixedly connected to the frame body and the battery pack by fasteners. The fixing member includes a back side and other surfaces. The back side faces away from the battery pack and the frame body. The fixing member is coated with an insulating coating on the other surfaces except the back side. The fixing member is respectively set on the left and right sides of the battery pack. The top or bottom of the frame body is grounded through a wire.

[0004] The aforementioned technologies have the following drawbacks: if the locomotive is large and a large number of battery packs are required, the cluster frame needs to be spliced ​​together from multiple frames, and the conductivity between adjacent frames is difficult to guarantee. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a battery cluster grounding device for new energy locomotives, which solves the technical problem that the conductivity of multi-frame splicing is difficult to guarantee in the prior art.

[0006] To achieve the above technical objectives, the present invention provides a battery cluster rack grounding device for a new energy locomotive, comprising a frame, wherein the frame is provided with a receiving cavity for placing a battery pack. A conducting mechanism, comprising a conducting bolt, the conducting bolt being welded to a frame and located within a receiving cavity, wherein the battery pack is electrically connected to the conducting bolt; An equipotential bonding mechanism, comprising equipotential bolts connected to the side of a frame, with adjacent equipotential bolts on the frame electrically connected; and... The grounding mechanism includes a grounding bolt and a grounding busbar. The grounding bolt is threaded to the top or bottom of the frame and is electrically connected to the grounding busbar on the locomotive.

[0007] In some embodiments, the frame includes a plurality of carbon steel beams connected end to end in sequence.

[0008] In some embodiments, the surface of the carbon steel beam is treated with a conductive coating.

[0009] In some embodiments, the grounding device further includes a conductor, a conductor ring, and a fixing assembly. The two conductor rings are respectively fixedly connected to both ends of the conductor. The two conductor rings are respectively detachably connected to the battery pack and the conductive bolt, the two equipotential bolts, and the grounding bolt and the grounding busbar through the fixing assembly.

[0010] In some embodiments, the guide ring is wavy.

[0011] In some embodiments, the fixing component includes studs and nuts, with a plurality of studs respectively connected to the battery pack, conductive bolts, equipotential bolts, grounding bolts and grounding busbars, a guide ring sleeved on the studs, and the nut threadedly connected to the studs and pressed against the guide ring.

[0012] In some embodiments, the grounding device further includes a conductive layer disposed on the contact surface of the conductive ring.

[0013] In some embodiments, the grounding device further includes an anti-loosening mechanism, which includes a spring washer fitted onto a stud, a nut abutting against the spring washer, and the spring washer abutting against a guide ring.

[0014] In some embodiments, the anti-loosening mechanism further includes a first toothed ring and a second toothed ring, the first toothed ring being sleeved on the stud, the spring washer abutting against the first toothed ring, and the second toothed ring being fixedly connected to the guide ring, with the first toothed ring and the second toothed ring meshing with each other.

[0015] In some embodiments, the conductor includes a wire body and an insulating layer, the insulating layer including a braided tube and a heat-shrinkable tube, both of which are sleeved on the wire body, the braided tube being located in the middle of the wire body and the heat-shrinkable tube being located at the end of the wire body.

[0016] Compared with the prior art, the beneficial effects of this utility model include: the equipotential mechanism is electrically connected to the cross-frame through equipotential bolts, which solves the problem of electrical interruption at the splicing point of multiple frames. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the grounding device provided by this utility model; Figure 2 This utility model provides Figure 1 Enlarged view of the local structure at point A; Figure 3 This is a schematic diagram of the overall structure of the conductor provided by this utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Frame; 11. Receiving cavity; 12. Carbon steel beam; 2. Battery pack; 3. Conducting mechanism; 31. Conducting bolt; 4. Equipotential mechanism; 41. Equipotential bolt; 5. Grounding mechanism; 51. Grounding bolt; 52. Grounding busbar; 6. Wire; 61. Conductor ring; 62. Fixing assembly; 621. Stud; 622. Nut; 63. Wire body; 64. Insulation layer; 641. Braided tubing; 642. Heat shrink tubing; 7. Anti-loosening mechanism; 71. Spring washer; 72. First toothed ring; 73. Second toothed ring. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0020] This utility model provides a battery cluster grounding device for a new energy locomotive, the structure of which is as follows: Figure 1 - Figure 3 As shown, it includes a frame 1, a conductive mechanism 3, an equipotential mechanism 4, and a grounding mechanism 5.

[0021] The frame 1 is provided with a receiving cavity 11 for placing the battery pack 2.

[0022] The conduction mechanism 3 includes a conduction bolt 31, which is welded to the frame 1 and located in the receiving cavity 11. The battery pack 2 is electrically connected to the conduction bolt 31.

[0023] The equipotential mechanism 4 includes an equipotential bolt 41, which is connected to the side of the frame 1 and is electrically connected to adjacent equipotential bolts 41 on the frame 1.

[0024] The grounding mechanism 5 includes a grounding bolt 51 and a grounding busbar 52. The grounding bolt 51 is threaded to the top or bottom of the frame 1 and is electrically connected to the grounding busbar 52 on the locomotive.

[0025] In use, frame 1 serves as the grounding core carrier. The conductive bolt 31 in its cavity 11 forms a rigid mechanical contact with frame 1 through a threaded connection. The battery pack 2 shell directly abuts against the conductive bolt 31. The equipotential bolt 41 on the side of frame 1 serves as a cross-frame conductive node. Adjacent frames 1 achieve direct electrical connection of the equipotential bolt 41 through conductive connectors. The grounding bolt 51 at the top or bottom of each frame 1 serves as the main grounding node and is connected to the locomotive main grounding busbar 52 through wires 6 or conductive busbars.

[0026] In this invention, the equipotential mechanism 4 is electrically connected to the cross-frame via equipotential bolts 41, which solves the problem of electrical interruption at the splicing point of the multi-frame 1.

[0027] To improve the strength of frame 1, please refer to... Figure 1 In a preferred embodiment, the frame 1 includes a plurality of carbon steel beams 12, which are connected end to end in sequence.

[0028] When in use, carbon steel beam 12 has better bending and impact resistance than lightweight materials such as aluminum alloy, providing a stable installation reference for the conduction mechanism 3 and the equipotential mechanism 4, and avoiding the grounding bolt 51 from loosening and poor conductive contact due to the deformation of the frame 1.

[0029] To improve the electrical conductivity of carbon steel beam 12, please refer to... Figure 1 In a preferred embodiment, the surface of the carbon steel beam 12 is treated with an electrical conductive coating.

[0030] When in use, the carbon steel beam 12 usually has oxide scale on its surface when it leaves the factory, which will form a conductive layer. The conductive treatment can completely remove the insulation layer 64, and the frame 1 as a whole forms a continuous low-resistance conductor, ensuring that the leakage current of the battery pack 2 is conducted unimpeded along the carbon steel beam 12 to the equipotential bolt 41 and the grounding bolt 51, eliminating conductive breaks.

[0031] To form a complete grounding network, please refer to... Figure 2 In a preferred embodiment, the grounding device further includes a conductor 6, a conductor ring 61, and a fixing component 62. The two conductor rings 61 are respectively fixedly connected to both ends of the conductor 6. The two conductor rings 61 are respectively detachably connected to the battery pack 2 and the conductive bolt 31, the two equipotential bolts 41, and the grounding bolt 51 and the grounding busbar 52 through the fixing component 62.

[0032] During operation, leakage current is transmitted to frame 1 through battery pack 2, conductor ring 61, wire 6, and conductive bolt 31. Within frame 1, current is conducted through carbon steel beam 12 to equipotential bolt 41, and then through conductor ring 61, wire 6, and adjacent frame 1 equipotential bolts 41 to achieve current balancing across multiple frames 1. Finally, all current is safely discharged through grounding bolt 51, conductor ring 61, wire 6, and locomotive grounding busbar 52 of frame 1. The detachable design of the fixing component 62 ensures that each connection point can be independently installed and removed, while the flexible fit between wire 6 and conductor ring 61 ensures the continuity of the conductive path under vibration conditions, forming a segmented, detachable grounding network.

[0033] To improve conductivity stability, please refer to... Figure 2 In a preferred embodiment, the guide ring 61 is wavy.

[0034] When in use, the wavy guide ring 61 makes contact with the connection end, not as a line contact or small surface contact as a traditional flat ring, but as a multi-point dispersed surface contact formed by multiple wave peaks. Even if there are tiny scratches or oxide spots on the surface of the connection end, the multiple wave peaks of the wavy structure can still avoid the defect area and form an effective conductive path, avoiding the sudden increase in resistance caused by single-point contact failure and improving the conductivity stability.

[0035] To secure the guide ring 61, please refer to... Figure 2 In a preferred embodiment, the fixing component 62 includes studs 621 and nuts 622. A plurality of studs 621 are respectively connected to the battery pack 2, the conductive bolt 31, the equipotential bolt 41, the grounding bolt 51, and the grounding busbar 52. The guide ring 61 is sleeved on the studs 621, and the nut 622 is threadedly connected to the studs 621 and pressed against the guide ring 61.

[0036] In use, studs 621 are welded to the grounding protrusion of battery pack 2, the head of conductive bolt 31, equipotential bolt 41, grounding bolt 51, and the pre-set holes of grounding busbar 52. A wavy guide ring 61 is axially fitted onto the stud 621, with a clearance fit between the inner diameter of the guide ring 61 and the outer diameter of the stud 621. After fitting, the wavy crest of the guide ring 61 naturally conforms to the surface of the connecting body. Nuts 622 are tightened axially along the stud 621. The surface of the guide ring 61 is closely fitted with the trough of the wave-shaped structure. The axial pressure causes the peak of the guide ring 61 to undergo compression deformation, forming a continuous elastic preload. After tightening, the nut 622 and the thread of the stud 621 form a friction self-lock. Combined with the elastic reaction force of the guide ring 61, it can resist the loosening of the threads caused by the high-frequency vibration of the locomotive. The fixing component 62 achieves detachable installation of each connection point through the synergy of the stud 621 positioning, the guide ring 61 adaptation, and the nut 622 tightening.

[0037] To improve conductivity, please refer to... Figure 2 In a preferred embodiment, the grounding device further includes a conductive layer disposed on the contact surface of the conductive ring 61.

[0038] When in use, the conductive layer is made of silver-based conductive paste, which can accurately fill the gap between the conductive ring 61 and the connection end. When the crest of the wavy structure of the conductive ring 61 contacts the connection end, the conductive layer can eliminate the contact gap caused by surface roughness, thereby increasing the actual conductive area compared to when there is no conductive layer and further reducing the contact resistance.

[0039] To reduce the possibility of guide ring 61 becoming loose, please refer to... Figure 2 In a preferred embodiment, the grounding device further includes an anti-loosening mechanism 7, which includes a spring washer 71. The spring washer 71 is sleeved on the stud 621, the nut 622 abuts against the spring washer 71, and the spring washer 71 abuts against the guide ring 61.

[0040] In use, the spring washer 71 is made of spring steel and is sleeved on the stud 621 and clamped between the nut 622 and the guide ring 61. When the nut 622 is tightened, axial compression deformation will be generated, forming a continuous elastic reaction force. Under high-frequency vibration or impact load of the locomotive, the nut 622 is prone to slight axial loosening due to vibration. The elastic force of the spring washer 71 can compensate for the loosening gap in real time, maintain the clamping force of the nut 622 on the guide ring 61, and avoid the problem of reduced clamping force in the traditional washerless structure.

[0041] To further reduce the possibility of guide ring 61 becoming loose, please refer to... Figure 2 In a preferred embodiment, the anti-loosening mechanism 7 further includes a first toothed ring 72 and a second toothed ring 73. The first toothed ring 72 is sleeved on the stud 621, the spring washer 71 abuts against the first toothed ring 72, and the second toothed ring 73 is fixedly connected to the guide ring 61. The first toothed ring 72 and the second toothed ring 73 mesh with each other.

[0042] When tightening the nut 622, the elastic force of the spring washer 71 pushes the first toothed ring 72 axially against the second toothed ring 73, and the teeth interlock, restricting the relative circumferential rotation of the first toothed ring 72 and the second toothed ring 73, completely blocking the tendency of the nut 622 to loosen due to vibration.

[0043] To reduce the possibility of short circuit in line 63, please refer to Figure 3 In a preferred embodiment, the conductor 6 includes a conductor 63 and an insulation layer 64. The insulation layer 64 includes a braided tube 641 and a heat-shrinkable tube 642. Both the braided tube 641 and the heat-shrinkable tube 642 are sleeved on the conductor 63. The braided tube 641 is located in the middle of the conductor 63, and the heat-shrinkable tube 642 is located at the end of the conductor 63.

[0044] In use, the braided tubing 641 exhibits excellent ductility and bending fatigue resistance, allowing it to adapt to the high-frequency vibration of the cable 63 during locomotive operation or bending during installation, thus avoiding cracking caused by excessive rigidity in traditional single heat shrink tubing 642. The connection point between the cable 63 end and the guide ring 61 is prone to exposure due to damage to the insulation layer 64. The heat shrink tubing 642 can form a dense insulation layer 64, which provides higher insulation strength than the braided tubing 641, effectively preventing short circuits caused by contact with other metal components of the locomotive.

[0045] To better understand this utility model, the following is combined with... Figure 1 - Figure 3 The working principle of a battery cluster grounding device for a new energy locomotive is described in detail below: The frame 1 serves as the core carrier for grounding. The conductive bolt 31 in its cavity 11 forms a rigid mechanical contact with the frame 1 through a threaded connection. The battery pack 2 shell directly abuts against the conductive bolt 31. The equipotential bolt 41 on the side of the frame 1 serves as a cross-frame conductive node. Adjacent frames 1 are directly electrically connected to the equipotential bolt 41 through conductive connectors. The grounding bolt 51 at the top or bottom of each frame 1 serves as the main grounding node and is connected to the locomotive's main grounding busbar 52 through a conductor 6 or conductive busbar.

[0046] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A battery cluster grounding device for a new energy locomotive, characterized in that, include: A frame having a receiving cavity for placing a battery pack; A conducting mechanism, comprising a conducting bolt, the conducting bolt being welded to a frame and located within a receiving cavity, wherein the battery pack is electrically connected to the conducting bolt; An equipotential bonding mechanism, comprising equipotential bolts connected to the side of a frame, with adjacent equipotential bolts on the frame electrically connected; and... The grounding mechanism includes a grounding bolt and a grounding busbar. The grounding bolt is threaded to the top or bottom of the frame and is electrically connected to the grounding busbar on the locomotive.

2. The battery cluster grounding device for new energy locomotives according to claim 1, characterized in that, The frame comprises multiple carbon steel beams, which are connected end to end in sequence.

3. The battery cluster grounding device for new energy locomotives according to claim 2, characterized in that, The surface of the carbon steel beam is treated with an electrical conductive coating.

4. The battery cluster grounding device for new energy locomotives according to claim 1, characterized in that, The grounding device also includes a conductor, a conductor ring, and a fixing component. The two conductor rings are respectively fixedly connected to both ends of the conductor. The two conductor rings are respectively detachably connected to the battery pack and the conductive bolt, the two equipotential bolts, and the grounding bolt and the grounding busbar through the fixing component.

5. The battery cluster grounding device for new energy locomotives according to claim 4, characterized in that, The guide ring is wavy.

6. The battery cluster grounding device for new energy locomotives according to claim 4, characterized in that, The fixing component includes studs and nuts. Multiple studs are respectively connected to the battery pack, conductive bolts, equipotential bolts, grounding bolts, and grounding busbars. The guide ring is sleeved on the studs, and the nut is threaded onto the studs and pressed against the guide ring.

7. The battery cluster grounding device for new energy locomotives according to claim 4, characterized in that, The grounding device further includes a conductive layer disposed on the contact surface of the conductive ring.

8. The battery cluster grounding device for new energy locomotives according to claim 6, characterized in that, The grounding device further includes an anti-loosening mechanism, which includes a spring washer fitted onto the stud, the nut abutting against the spring washer, and the spring washer abutting against the guide ring.

9. The battery cluster grounding device for a new energy locomotive according to claim 8, characterized in that, The anti-loosening mechanism further includes a first toothed ring and a second toothed ring. The first toothed ring is sleeved on the stud, the spring washer abuts against the first toothed ring, and the second toothed ring is fixedly connected to the guide ring. The first toothed ring and the second toothed ring mesh with each other.

10. The battery cluster grounding device for a new energy locomotive according to claim 4, characterized in that, The conductor includes a wire body and an insulation layer. The insulation layer includes a braided tube and a heat-shrinkable tube. Both the braided tube and the heat-shrinkable tube are sleeved on the wire body. The braided tube is located in the middle of the wire body, and the heat-shrinkable tube is located at the end of the wire body.

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