Battery and vehicle bottom system assembly protection structure

Abstract

The invention provides a battery and vehicle bottom system assembly protection structure, and relates to the field of new energy vehicles. The battery and vehicle bottom system assembly protection structure comprises a battery pack and a bottom protection plate which are mounted at the bottom of the new energy vehicle. The battery pack is provided with a first side face and a second side face which are opposite in a first horizontal direction and a second horizontal direction which are perpendicular to each other, and at least one first side face is provided with a first sliding groove body which extends in the first horizontal direction and is provided with a sliding channel. The bottom protection plate comprises a first protection part and two second protection parts at the two ends so as to jointly enclose the battery pack. The second protection part is provided with a sliding buckle, and the sliding buckle can slide in the sliding channel in the second horizontal direction, so that the first protection part can abut against or be separated from the second side face in the second horizontal direction. When the sliding buckle slides into the channel and the first protection part abuts against the second side face, the bottom protection plate connecting hole is aligned with the electric car bottom support screw joint hole.

Description

Battery and underbody system assembly protection structure Technical Field

[0001] This invention belongs to the field of new energy vehicle technology, and in particular relates to a protective structure for a battery and vehicle underbody system assembly. Background Technology

[0002] During the operation of new energy vehicles, the area around the battery pack is subject to external mechanical damage such as impacts from road debris and scratches from obstacles. Therefore, it is necessary to protect the battery pack and the surrounding area.

[0003] In existing underbody systems for new energy vehicles, protective plates are typically fixed by bolts directly to the bottom of the vehicle or the outside of the battery pack. However, this type of fixing structure has significant drawbacks in actual assembly: during assembly, precise alignment of the protective plate with the mounting holes on the mounting reference surface (bottom of the new energy vehicle or battery pack shell) is required. This not only demands a high level of skill from the assembly personnel but also results in long assembly times per unit, low assembly efficiency, and difficulty in meeting the pace requirements of large-scale production.

[0004] Furthermore, since the core function of the bottom guard plate is protection rather than load-bearing, existing bottom guard plates generally adopt a thin and lightweight structural design based on the requirements of lightweighting and cost control. However, this thin and lightweight design will result in insufficient rigidity of the guard plate itself, and it is prone to slight deformation during assembly and alignment, which will aggravate the problem of misalignment of the mounting holes. This not only further reduces assembly efficiency, but may also cause uneven bolt tightening stress due to forced alignment of the holes, affecting the connection reliability of the protective structure. Summary of the Invention

[0005] In view of this, the present invention provides a battery and underbody system assembly protection structure, which aims to solve the problems of low assembly efficiency and inaccurate alignment in the prior art battery and underbody system assembly protection structures.

[0006] The technical solution of the present invention is implemented as follows: An embodiment of the present invention provides a battery and vehicle underbody system assembly protection structure, the battery and vehicle underbody system assembly protection structure including a battery pack and a bottom guard plate. The battery pack is used to install on the bottom of a new energy vehicle. The battery pack has two opposing first sides in a first horizontal direction and two opposing second sides in a second horizontal direction. At least one of the two first sides is provided with a first sliding groove extending along the first horizontal direction, and a sliding channel is formed within the first sliding groove. The first horizontal direction is perpendicular to the second horizontal direction. The bottom guard plate includes a first protective part and two second protective parts correspondingly connected to both ends of the first protective part. The first protective part and the two second protective parts together surround the battery pack. The second protective part is provided with a sliding buckle, which can slide along the second horizontal direction and connect to the sliding channel, so that the first protective part abuts against or disengages from the second side in the second horizontal direction. Wherein, when the sliding buckle is slidably connected to the sliding channel and the first protective part abuts against the second side, the connecting hole of the bottom guard plate can be aligned with the screw hole of the vehicle underbody bracket.

[0007] In one embodiment, the first slide body includes a first upper stop and a first lower stop extending along the second horizontal direction, the first upper stop and the first lower stop being spaced apart in the height direction on the first side; wherein, the sliding channel is formed between the first upper stop and the first lower stop; the sliding buckle protrudes relative to the second protective part in the first horizontal direction.

[0008] In one embodiment, the first lower stop bar has an installation channel communicating with the sliding channel. The installation channel extends through the first lower stop bar in the height direction, so that the sliding buckle enters the sliding channel in the height direction through the installation channel.

[0009] In one embodiment, the first upper stop bar and the first lower stop bar are respectively formed with flanges facing into the sliding channel.

[0010] In one embodiment, the sliding buckle includes: a main body portion connected to the second protective portion and protruding from the second protective portion in the first direction; an upper hook portion protruding from the upper end face of the main body portion to abut against the upper side of the sliding channel in the height direction and hooking into the flange of the first upper stop bar in the first horizontal direction; and a lower hook portion protruding from the lower end face of the main body portion to abut against the lower side of the sliding channel in the height direction and hooking into the flange of the first lower stop bar in the second horizontal direction.

[0011] In one embodiment, the sliding buckle is integrally formed; the edge region of the second protective part is integrally formed with an upwardly extending first stamped protrusion, one edge of the first stamped protrusion is open, and the main body of the sliding buckle is fixedly connected to the open edge of the first stamped protrusion.

[0012] In one embodiment, the second side is provided with a second groove extending along the first horizontal direction; when the first protective part abuts against the second side, the edge of the first protective part is fitted into the second groove to position the bottom protective plate around the battery pack.

[0013] In one embodiment, the second slide body includes a second upper stop and a second lower stop that are spaced apart in the height direction; the edge region of the first protective part is integrally formed with an upwardly extending second stamped protrusion, one edge of the second stamped protrusion being open; wherein, when the first protective part abuts against the second side surface, the second stamped protrusion is embedded in the region between the second upper stop and the second lower stop, and the open edge of the second stamped protrusion abuts against the second side surface.

[0014] In one embodiment, a clearance notch is formed at the junction of the first protective part and the second protective part to avoid the top corner of the battery pack.

[0015] This invention also relates to a new energy vehicle; the new energy vehicle includes a battery and underbody system assembly protection structure and a vehicle body, the battery and underbody system assembly protection structure includes a battery pack and a bottom guard plate, the battery pack is used to be installed on the bottom of the new energy vehicle; the battery pack has two first sides opposite each other in a first horizontal direction, and two second sides opposite each other in a second horizontal direction, and at least one of the two first sides is provided with a first groove extending along the first horizontal direction, the first groove forming a sliding channel; the first horizontal direction is perpendicular to the second horizontal direction; the bottom guard plate includes a first protective part and corresponding connections to both ends of the first protective part. The first protective part and the two second protective parts together surround the battery pack; the second protective part is provided with a sliding buckle, which can be slidably connected to the sliding channel along the second horizontal direction, so that the first protective part abuts against or disengages from the second side along the second horizontal direction; wherein, when the sliding buckle is slidably connected to the sliding channel and the first protective part abuts against the second side, the connecting hole of the bottom guard plate can be aligned with the screw hole of the tram bottom bracket; the first protective part and / or the second protective part are provided with connecting holes; the bottom bracket of the vehicle body is provided with screw holes adapted to the connecting holes.

[0016] The battery and underbody system protection structure provided by this invention achieves sliding installation and pre-fixation of the underbody plate relative to the battery pack along a second horizontal direction by setting a first sliding groove extending along a first horizontal direction on the first side of the battery pack and setting a sliding buckle that slides and engages with the first sliding groove on the second protective part of the underbody plate. This sliding assembly design greatly reduces the difficulty of precise hole alignment during assembly compared to the traditional direct bolt fastening method. The operator only needs to align the sliding buckle with the entrance of the sliding channel and push the underbody plate to slide. Under the guidance of the sliding buckle and the sliding channel, the underbody plate will automatically adjust to the correct position, ensuring that the first protective part abuts against the second side of the battery pack. At the same time, the connecting holes on the underbody plate are accurately aligned with the screw holes of the new energy vehicle's bottom bracket, thereby significantly improving assembly efficiency, reducing the skill requirements of the operator, and making it more suitable for the pace of mass production. In addition, for the underbody plate with a thin design, even if slight deformation occurs during assembly, the smooth sliding of the sliding buckle in the sliding channel can effectively correct its small positional deviation, ensuring the accuracy of hole alignment. Meanwhile, based on the sliding fit disassembly method and combined with the avoidance characteristics of the C-shaped structure, the bottom guard plate can be quickly inspected and replaced without additional disassembly of related components, making disassembly very convenient. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 is an overall structural diagram of the battery and vehicle undercarriage system assembly protection structure provided by the present invention; Figure 2 is a first exploded view of the battery and vehicle undercarriage system assembly protection structure provided by the present invention; Figure 3 is a second exploded view of the battery and vehicle undercarriage system assembly protection structure provided by the present invention; Figure 4 is an enlarged view of point A in Figure 3; Figure 5 is a structural schematic diagram of the buckle provided by the present invention.

[0019] Explanation of reference numerals in the attached drawings: 100, Battery and underbody system assembly protection structure; 1, Battery pack; 11, First side; 12, Second side; 2, Underbody protection plate; 21, First protective part; 211, Second stamped protrusion; 22, Second protective part; 221, First stamped protrusion; 23, Clearance notch; 24, Connecting hole; 3, First sliding groove; 30, Sliding channel; 31, First upper stop bar; 32, First lower stop bar; 320, Mounting channel; 4, Sliding buckle; 41, Main body; 42, Upper hook part; 43, Lower hook part; 5, Second sliding groove; 51, Second upper stop bar; 52, Second lower stop bar. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] In existing protective structures for new energy vehicle batteries and underbody systems, the protective plates are mostly fixed by bolts directly to the bottom of the new energy vehicle or the outside of the battery pack. However, this type of fixing structure has significant drawbacks in actual assembly: during assembly, the protective plate needs to be precisely aligned with the mounting holes on the mounting reference surface (the bottom of the new energy vehicle or the outer shell of the battery pack). This not only requires a high level of skill from the assembly personnel but also results in long assembly times per unit, low assembly efficiency, and difficulty in meeting the pace requirements of large-scale production.

[0024] Furthermore, since the core function of the bottom guard plate is protection rather than load-bearing, existing bottom guard plates generally adopt a thin and lightweight structural design based on the requirements of lightweighting and cost control. However, this thin and lightweight design will result in insufficient rigidity of the guard plate itself, and it is prone to slight deformation during assembly and alignment, which will aggravate the problem of misalignment of the mounting holes. This not only further reduces assembly efficiency, but may also cause uneven bolt tightening stress due to forced alignment of the holes, affecting the connection reliability of the protective structure.

[0025] In view of this, the present invention provides a battery and underbody system assembly protection structure, which aims to solve the problems of low assembly efficiency and inconvenient disassembly of the existing battery and underbody system assembly protection structure.

[0026] Please refer to Figures 1 and 2. The battery and underbody system assembly protection structure 100 includes a battery pack 1 and an underbody protection plate 2.

[0027] The battery pack 1 is used for installation on the bottom of a new energy vehicle. It has two first sides 11 opposite each other in a first horizontal direction and two second sides 12 opposite each other in a second horizontal direction. When the battery pack 1 is installed on the bottom of the vehicle, the two first sides 11 and the two second sides 12 together constitute the outer periphery of the battery pack 1. The first horizontal direction and the second horizontal direction are perpendicular to each other, for example, they can correspond to the lateral and longitudinal directions of the new energy vehicle, respectively. The first horizontal direction is represented by dashed line a in Figure 2, and the second horizontal direction is represented by dashed line b in Figure 2. To achieve sliding engagement with the underbody protection plate 2, at least one of the two first sides 11 is provided with a first groove 3 extending along the first horizontal direction. Of course, providing the first groove 3 on both first sides 11 can improve the stability of the underbody protection plate 2 after installation more than providing it on only one side.

[0028] The first chute 3 has a sliding channel 30 inside for the bottom guard plate 2 to slide. The sliding channel 30 extends along the first horizontal direction and provides a guide path for the sliding of the bottom guard plate 2.

[0029] The bottom protective plate 2, as a component that directly contacts the outside world and provides protection for the battery pack 1 and its periphery, includes a first protective part 21 and two second protective parts 22 corresponding to the two ends of the first protective part 21. The first protective part 21 and the two second protective parts 22 together surround the outer periphery of the battery pack 1, forming a circumferential protection for the bottom and sides of the battery pack 1. Specifically, the two second protective parts 22 are respectively provided for the two first side surfaces 11 of the battery pack 1. Each second protective part 22 is provided with a sliding buckle 4 adapted to the first sliding groove body 3. The sliding buckle 4 can slide along the second horizontal direction and is connected to the sliding channel 30 of the first sliding groove body 3. Through the cooperation of the sliding buckle 4 and the sliding channel 30, the bottom protective plate 2 as a whole can slide relative to the battery pack 1 along the second horizontal direction, thereby enabling the first protective part 21 to abut against or detach from the second side surface 12 of the battery pack 1 along the second horizontal direction.

[0030] Since the sliding buckle 4 of the bottom guard plate 2 can be slidably connected to the sliding channel 30 of the first sliding groove body 3 of the battery pack 1 along the second horizontal direction, during assembly, the operator can first align the sliding buckle 4 of the bottom guard plate 2 with the entrance of the sliding channel 30. If the entrance is downward, the bottom guard plate 2 can be lifted from below so that the sliding buckle 4 is initially aligned with the entrance of the sliding channel 30 in the height direction. Then, the bottom guard plate 2 is pushed to move along the second horizontal direction so that the sliding buckle 4 can smoothly slide into the sliding channel 30 and slide along its extension direction. If the entrance is horizontal, the sliding buckle 4 can be directly pushed into the sliding channel 30 in the horizontal direction. When the sliding buckle 4 is slidably connected to the sliding channel 30 and the first protective part 21 abuts against the second side 12 of the battery pack 1, the bottom guard plate 2 and the battery pack 1 form a stable pre-fixed state. At the same time, the connecting hole 24 on the bottom guard plate 2 can be aligned with the pre-set screw hole of the tram bottom bracket so that the bottom guard plate 2 can be finally fixed to the bottom of the tram by bolts and other fasteners, completing the entire assembly process.

[0031] Even though the bottom guard plate 2 adopts a thin and light structure design, slight deformation may occur during the assembly and alignment process. However, due to the precise guiding effect provided by the cooperation between the sliding buckle 4 and the sliding channel 30, the sliding of the sliding buckle 4 in the sliding channel 30 can automatically correct the slight positional deviation of the bottom guard plate 2 caused by deformation, ensuring that when the first protective part 21 abuts against the second side 12, the connecting hole 24 of the bottom guard plate 2 and the screw hole of the tram bottom bracket can be accurately aligned.

[0032] Furthermore, because the bottom cover plate 2 has a C-shaped structure, the battery pack 1 can be accommodated between the opening side and the enclosed area of ​​the C-shaped structure during installation. This structural design not only allows operators to visually observe the relative position of the bottom cover plate 2 and the battery pack 1 and adjust the alignment angle of the sliding buckle 4 and the first sliding groove 3, but also improves the convenience of installation. Simultaneously, due to the open-type avoidance characteristic of the C-shaped structure, when the bottom cover plate 2 needs maintenance or replacement, it is only necessary to first remove the bolts used for final fixing, and then push the bottom cover plate 2 in the opposite direction along the second horizontal direction to allow the sliding buckle 4 to disengage from the sliding channel 30 of the first sliding groove 3, achieving rapid separation of the bottom cover plate 2 and the battery pack 1 without the need for additional disassembly of other related components. This effectively solves the problem of inconvenient disassembly of existing modular connection structures and significantly reduces the labor cost and operational difficulty of later maintenance. It should be added that protective paint can be sprayed onto the bottom of the battery pack 1.

[0033] In summary, the battery and underbody system assembly protection structure 100 provided in this embodiment of the invention achieves sliding installation and pre-fixation of the underbody plate 2 relative to the battery pack 1 along the second horizontal direction by setting a first sliding groove 3 extending along the first horizontal direction on the first side 11 of the battery pack 1 and setting a sliding buckle 4 that slides and engages with the first sliding groove 3 on the second protective part 22 of the underbody plate 2. This sliding assembly design, compared with the traditional direct bolt fastening method, greatly reduces the difficulty of accurately aligning the holes during the assembly process. The operator only needs to align the sliding buckle 4 with the entrance of the sliding channel 30 and push the underbody plate 2 to slide. Under the guidance of the sliding buckle 4 and the sliding channel 30, the underbody plate 2 will automatically adjust to the correct position, ensuring that the first protective part 21 abuts against the second side 12 of the battery pack 1, and at the same time, accurately aligning the connecting hole 24 on the underbody plate 2 with the screw hole of the new energy vehicle bottom bracket. This significantly improves assembly efficiency, reduces the skill requirements of the operator, and is more suitable for the pace of mass production. Furthermore, for the thin and lightweight bottom plate 2, even if slight deformation occurs during assembly, the smooth sliding of the sliding buckle 4 within the sliding channel 30 can effectively correct minor positional deviations, ensuring the accuracy of hole alignment. Simultaneously, based on the sliding fit disassembly method, combined with the avoidance characteristics of the C-shaped structure, the bottom plate 2 can be quickly inspected and replaced without additional disassembly of related components, making disassembly extremely convenient.

[0034] In some embodiments, please refer to Figures 3 and 4. In order to improve the stability of the engagement between the sliding buckle 4 and the sliding channel 30, the first sliding groove body 3 includes a first upper stop bar 31 and a first lower stop bar 32 extending along the second horizontal direction, respectively. The first upper stop bar 31 and the first lower stop bar 32 are spaced apart in the height direction on the first side 11. The sliding channel 30 is formed between the first upper stop bar 31 and the first lower stop bar 32. Correspondingly, the sliding buckle 4 protrudes from the second protective part 22 in the first horizontal direction. This protruding structure can be accurately embedded in the sliding channel 30 between the first upper stop bar 31 and the first lower stop bar 32, so as to realize the limiting sliding engagement between the sliding buckle 4 and the sliding channel 30 and prevent the bottom guard plate 2 from moving up and down during sliding or use.

[0035] Since the first upper baffle 31 and the first lower baffle 32 together constitute a limiting structure for the protective plate in the vertical direction, and the first protective part 21 abuts against the second side 12 to form a limiting function for the bottom protective plate 2 in the horizontal direction, through this multi-directional limiting and synergistic effect, the bottom protective plate 2 can be stably positioned on the outside of the battery pack 1 before the screws are installed, effectively avoiding displacement caused by slight vibration of the new energy vehicle or accidental contact by the operator, thereby ensuring the precise alignment of the subsequent connecting hole 24 with the screw hole of the bottom bracket of the new energy vehicle, and improving the convenience and accuracy of the assembly process.

[0036] In some embodiments, please continue to refer to Figures 3 and 4. In order to improve the convenience of the operator, the first lower stop bar 32 is provided with an installation channel 320 communicating with the sliding channel 30. The installation channel 320 passes through the first lower stop bar 32 in the height direction so that the sliding buckle 4 enters the sliding channel 30 in the height direction through the installation channel 320.

[0037] In actual assembly scenarios, the installation channel 320 provides a more flexible operating method for the initial positioning of the bottom guard plate 2. For example, when the battery pack 1 is pre-installed on the bottom of the new energy vehicle and the bottom space is limited, the operator can first align the bottom guard plate 2 with the installation channel 320 from below the battery pack 1, so that the sliding buckle 4 passes through the installation channel 320 along the height direction (i.e., the vertical direction) until the sliding buckle 4 is completely inserted into the sliding channel 30 between the first upper stop bar 31 and the first lower stop bar 32. At this time, the inner wall of the installation channel 320 can guide the sliding buckle 4 during its entry, reducing the difficulty of aligning the sliding buckle 4 with the entrance of the sliding channel 30. Once the sliding buckle 4 enters the sliding channel 30, the operator can push the bottom guard plate 2 to slide along the second horizontal direction, so that the sliding buckle 4 moves smoothly within the sliding channel 30 until the first protective part 21 abuts against the second side 12 of the battery pack 1, completing the pre-fixation. Compared to the sliding channel 30 which only has a horizontal entrance, this design with an installation channel 320 can significantly reduce installation steps and operation time, especially in situations where the space at the bottom of new energy vehicles is small and horizontal operation is inconvenient, thus further improving assembly efficiency.

[0038] In some embodiments, please continue to refer to Figures 3 and 4, the first upper stop bar 31 and the first lower stop bar 32 are respectively formed with flanges facing into the sliding channel 30.

[0039] The flange can limit the position of the slide buckle 4 in the first horizontal direction when the slide buckle 4 slides along the sliding channel 30, preventing the slide buckle 4 from detaching from the side of the sliding channel 30. Specifically, the flange extends a certain length into the sliding channel 30, so that the lateral width of the sliding channel 30 is slightly smaller than the lateral dimension of the slide buckle 4. When the slide buckle 4 is embedded in the sliding channel 30, the flange engages with the upper and lower surfaces or side edges of the slide buckle 4, effectively limiting the wobbling or displacement of the slide buckle 4 in the first horizontal direction, ensuring that the bottom guard plate 2 maintains a stable posture during the sliding process, and avoiding assembly jamming or protection failure caused by misalignment of the slide buckle 4.

[0040] The flanges of the first upper baffle 31 and the first lower baffle 32 can limit the bottom guard plate 2 in the first horizontal direction. The main body of the first upper baffle 31 and the first lower baffle 32 can limit the bottom guard plate 2 in the height direction. The first protective part 21 abuts against the second side 12 of the battery pack 1 and forms a limit in the second horizontal direction. The three work together to enable the bottom guard plate 2 to achieve multi-dimensional stable positioning in the pre-fixed state, which is more conducive to the final fixation of the bottom guard plate 2 to the bottom of the new energy vehicle by bolts and other fasteners.

[0041] In some embodiments, please refer to Figures 3, 4 and 5. In order to enhance the stability of the engagement between the sliding buckle 4 and the first sliding groove body 3, the sliding buckle 4 includes a main body 41, a lower hooking part 43 and an upper hooking part 42. The main body 41 is connected to the second protective part 22 and protrudes from the second protective part 22 in a first direction. The upper hooking part 42 protrudes from the upper end face of the main body 41 to abut against the upper side of the sliding channel 30 in the height direction and hooks into the flange of the first upper stop bar 31 in the first horizontal direction. The lower hooking part 43 protrudes from the lower end face of the main body 41 to abut against the lower side of the sliding channel 30 in the height direction and hooks into the flange of the first lower stop bar 32 in the second horizontal direction.

[0042] This structural design achieves multi-dimensional limiting and fixing through the double hooking cooperation of the lower hooking part 43 and the upper hooking part 42: in the height direction, the upper hooking part 42 abuts against the upper side of the sliding channel 30 and the lower hooking part 43 abuts against the lower side of the sliding channel 30, forming a two-way limiting of the sliding buckle 4, reducing the space for the bottom guard plate 2 to move in the height direction; in the horizontal direction, the upper hooking part 42 hooks the flange of the first upper stop bar 31 and the lower hooking part 43 hooks the flange of the first lower stop bar 32, forming hooking and fixing in the first horizontal direction and the second horizontal direction respectively, limiting the displacement of the sliding buckle 4 on the horizontal plane and preventing it from accidentally detaching along the sliding channel 30. Meanwhile, this hook-and-loop structure, while ensuring the stability of the fit, does not affect the normal sliding of the sliding buckle 4 along the extension direction of the sliding channel 30. This ensures that the bottom guard plate 2 can move smoothly to the predetermined position during assembly, and also provides a stable support and positioning for the bottom guard plate 2 after assembly. This makes the pre-fixed state of the bottom guard plate 2 before bolt tightening more reliable, further reducing the positioning difficulty during bolt tightening. During the operation of new energy vehicles, even when encountering complex road conditions, this double hook-and-loop structure can firmly restrict the sliding buckle 4 within the sliding channel 30, ensuring the stable protection of the battery pack 1 by the bottom guard plate 2, and greatly improving the vibration resistance and service life of the protective structure.

[0043] In some embodiments, please refer to Figures 3 and 4. In order to simplify the production process, reduce manufacturing costs, and improve the structural strength of the slide buckle 4 and the reliability of its connection with the second protective part 22 of the bottom guard plate 2, the slide buckle 4 is integrally formed. The edge region of the second protective part 22 is integrally formed with an upwardly extending first stamped protrusion 221. One edge of the first stamped protrusion 221 is open. The main body 41 of the slide buckle 4 is fixedly connected to the open edge of the first stamped protrusion 221.

[0044] Specifically, the slide buckle 4 adopts a one-piece molding process, such as one-piece metal stamping or one-piece engineering plastic injection molding. The stamped first stamped protrusion 221 can form a three-dimensional support structure, which can effectively enhance the structural rigidity of the edge area of ​​the second protective part 22 and provide a stable installation base for the slide buckle 4.

[0045] From a mechanical perspective, the second protective part 22 is typically a flat plate structure, with relatively low bending and torsional stiffness at its edges. If the sliding buckle 4 is directly installed on the edge of the plate, it is prone to local bending deformation when subjected to lateral thrust or vertical load. This can cause changes in the fit clearance between the sliding buckle 4 and the sliding groove of the battery pack 1, affecting the sliding guidance accuracy and even leading to jamming or abnormal wear. The first stamped protrusion 221, through a stamping process, forms an upward-extending three-dimensional structure, transforming the original planar force-bearing system into a three-dimensional force-bearing system. On one hand, the protrusion increases the moment of inertia of the cross-section at the edge of the second protective part 22, significantly improving the bending and torsional stiffness of this area, effectively resisting the lateral and vertical loads transmitted by the sliding buckle 4 and reducing local deformation. On the other hand, the three-dimensional support structure can distribute the load borne by the sliding buckle 4 to a larger area of ​​the second protective part 22, avoiding structural damage caused by concentrated loads in a localized area. This provides a stable mechanical support foundation for the sliding buckle 4, ensuring that the fit accuracy between the sliding buckle 4 and the sliding groove remains stable over a long period.

[0046] In some embodiments, please refer to Figures 3 and 4. In order to enhance the connection stability and positioning accuracy between the bottom guard plate 2 and the battery pack 1, the second side 12 is provided with a second sliding groove 5 extending along the first horizontal direction. When the first protective part 21 abuts against the second side 12, the edge of the first protective part 21 is fitted into the second sliding groove 5 to position the bottom guard plate 2 on the periphery of the battery pack 1.

[0047] Specifically, the second sliding groove 5 extends along the first horizontal direction, and its interior forms a fitting groove that matches the edge of the first protective part 21. When the bottom guard plate 2 slides along the second horizontal direction until the first protective part 21 abuts against the second side 12 of the battery pack 1, the edge of the first protective part 21 can be precisely embedded in the fitting groove of the second sliding groove 5. This fitting structure not only further limits the bottom guard plate 2 in the second horizontal direction, preventing the bottom guard plate 2 from shifting along the second horizontal direction due to vibration and other factors during the operation of the new energy vehicle, but also provides auxiliary positioning and guiding functions in the first horizontal and height directions, making the overall position of the bottom guard plate 2 more accurate and stable after it abuts against the second side 12. This helps to ensure that the connecting hole 24 on the bottom guard plate 2 and the pre-set screw hole of the bottom bracket of the new energy vehicle can always maintain precise alignment, further reducing the difficulty of bolt tightening and improving the reliability of assembly. Meanwhile, the fit between the edge of the first protective part 21 and the second sliding groove body 5 increases the contact area and connection points between the bottom protective plate 2 and the battery pack 1, making the bottom protective plate 2 provide tighter protection for the side of the battery pack 1 and better resisting collisions or impacts from the side.

[0048] In some embodiments, please refer to Figures 3 and 4. In order to further improve the stability of the bottom guard plate 2 and the battery pack 1, strengthen the limiting effect of the first protective part 21 after it abuts against the second side 12, and reduce the movement of the bottom guard plate 2 in the height direction, a second sliding groove 5 extending in the first horizontal direction is also provided on the second side 12 of the battery pack 1. The second sliding groove 5 includes a second upper baffle 51 and a second lower baffle 52 spaced apart in the height direction. The edge region of the first protective part 21 is integrally formed with an upwardly extending second stamped protrusion 211, and one edge of the second stamped protrusion 211 is open. In the state where the first protective part 21 abuts against the second side 12, the second stamped protrusion 211 is embedded in the area between the second upper baffle 51 and the second lower baffle 52, and the open edge of the second stamped protrusion 211 abuts against the second side 12.

[0049] Since the second upper stop 51 and the second lower stop 52 of the second slide body 5 form a limiting space along the height direction, when the second stamped protrusion 211 is embedded in this space, the second upper stop 51 can block and limit the upper end of the second stamped protrusion 211, and the second lower stop 52 can support and limit the lower end of the second stamped protrusion 211, thereby accurately limiting the first protective part 21 in the height direction and reducing the possibility of the bottom guard plate 2 moving along the height direction. At the same time, the open edge of the second stamped protrusion 211 abuts against the second side 12 of the battery pack 1, which can further enhance the fit between the first protective part 21 and the second side 12, reduce the gap between them, and avoid collision noise caused by vibration during the operation of new energy vehicles. In addition, the second stamped protrusion 211 is integrally stamped with the first protective part 21, which also has the advantages of simplifying the production process and improving the structural strength. It can evenly transfer the load borne by the first protective part 21 to the second sliding groove 5, realize the distributed bearing of the load, and further improve the overall stability and service life of the protective structure.

[0050] In some embodiments, please refer to FIG3, in order to avoid interference when the bottom protective plate 2 is assembled with the battery pack 1, and to enable the first protective part 21 and the second protective part 22 to accurately surround the outer periphery of the battery pack 1, while improving the smoothness of the assembly process, an avoidance notch 23 is formed at the junction of the first protective part 21 and the second protective part 22 to avoid the top corner of the battery pack 1.

[0051] Specifically, the top corner of the battery pack 1 is the intersection area of ​​the first side 11 and the second side 12, which is a three-dimensional turning structure. Since the first protective part 21 and the two second protective parts 22 of the bottom guard plate 2 together form a surrounding protective structure, if the junction of the first protective part 21 and the second protective part 22 is a right angle or acute angle structure, it is very easy to cause mechanical interference with the top corner of the battery pack 1, which will prevent the bottom guard plate 2 from sliding smoothly to the preset assembly position, and may even cause paint scratches or structural wear at the junction of the top corner of the battery pack 1 or the bottom guard plate 2.

[0052] When the bottom guard plate 2 is slidably assembled relative to the battery pack 1 along the second horizontal direction, the avoidance notch 23 can accurately avoid the top corner of the battery pack 1, effectively eliminating the risk of assembly interference, and ensuring that the bottom guard plate 2 can be smoothly moved to the preset position where the first protective part 21 abuts against the second side 12 and the sliding buckle 4 is stably embedded in the first sliding groove 3.

[0053] In some embodiments, please refer to Figures 1 and 2. In order to achieve a stable fixation between the bottom guard plate 2 and the bottom of the tram and to ensure the reliability of the protective structure for long-term use, the first protective part 21 and / or the second protective part 22 are provided with connecting holes 24. The connecting holes 24 are used to align with the screw holes of the tram bottom bracket.

[0054] The overall assembly method and principle are as follows: First, the bottom guard plate 2 is slidably engaged with the first sliding groove 3 of the first side 11 of the battery pack 1 via the sliding buckle 4, so that the sliding buckle 4 is embedded in the sliding channel 30 and slides along the second horizontal direction until the first protective part 21 abuts against the second side 12 of the battery pack 1. At this time, the edge of the first protective part 21 (or the second stamped protrusion 211) is embedded in the second sliding groove 5 of the second side 12, completing the pre-fixation of the bottom guard plate 2 and the battery pack 1. Subsequently, the connecting holes 24 on the first protective part 21 and / or the second protective part 22 are aligned with the pre-set screw holes of the tram bottom bracket. By using fasteners such as bolts to pass through the connecting holes 24 and the screw holes, the bottom guard plate 2 is firmly locked to the bottom of the tram, finally forming an all-round wrapping protection of the battery pack 1 by the bottom guard plate 2. This assembly process makes full use of the guiding and positioning function of the sliding buckle 4 and the sliding channel 30, the stable support of the multi-directional limiting structure, and the docking design of the connecting holes 24, realizing efficient assembly from pre-fixation to final fastening.

[0055] The present invention also provides a new energy vehicle. Please refer to Figures 1 to 5. The new energy vehicle includes a vehicle body and a battery and underbody system assembly protection structure 100. The first protective part 21 and / or the second protective part 22 are provided with connection holes 24, and the bottom bracket of the vehicle body is provided with screw holes adapted to the connection holes 24.

[0056] In new energy vehicles, the bottom guard plate 2 of the battery and underbody system assembly protection structure 100 is screwed and fixed to the bottom bracket through the connecting holes 24. This ensures that the bottom guard plate 2 is securely installed at the bottom of the vehicle body, thereby providing reliable external protection for the battery pack 1. This effectively resists impacts from road debris and protrusions during driving, as well as erosion from water, mud, and other impurities, ensuring the safe operation of the battery pack 1. As a key protective component of the new energy vehicle's battery system, the rationality of the battery and underbody system assembly protection structure 100's design directly affects the safety, reliability, and assembly efficiency of the new energy vehicle. In the above embodiments, through a series of structural optimizations such as the limiting sliding cooperation between the sliding buckle 4 and the sliding channel 30, the multi-directional limiting synergy, the convenient design of the installation channel 320, the anti-detachment structure of the flange and the hook, the structural reinforcement of the stamped protrusion, the auxiliary positioning of the second sliding groove 5, the anti-interference design of the avoidance notch 23, and the fastening connection of the connecting hole 24, the overall performance of the battery and vehicle underbody system assembly protection structure 100 is improved from multiple dimensions such as assembly convenience, positioning accuracy, connection stability, structural strength, and protection reliability. This provides comprehensive and highly reliable protection for the new energy vehicle battery pack 1, and also provides convenient conditions for the large-scale production and maintenance of new energy vehicles.

[0057] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A protective structure for a battery and underbody system assembly, used in new energy vehicles, characterized in that, include: A battery pack is used to install on the bottom of a new energy vehicle. The battery pack has two first sides opposite each other in a first horizontal direction and two second sides opposite each other in a second horizontal direction. At least one of the two first sides is provided with a first groove extending in the first horizontal direction, and a sliding channel is formed in the first groove. The first horizontal direction is perpendicular to the second horizontal direction. A bottom guard plate includes a first protective part and two second protective parts corresponding to the two ends of the first protective part. The first protective part and the two second protective parts together surround the battery pack. The second protective part is provided with a sliding buckle, which can be slidably connected to the sliding channel in the second horizontal direction, so that the first protective part abuts against or disengages from the second side in the second horizontal direction. In the state where the sliding buckle is slidably connected to the sliding channel and the first protective part abuts against the second side, the connecting hole of the bottom guard plate can be aligned with the screw hole of the vehicle bottom bracket.

2. The battery and underbody system protection structure according to claim 1, characterized in that, The first slide body includes a first upper stop and a first lower stop extending along the second horizontal direction, the first upper stop and the first lower stop being spaced apart in the height direction on the first side; wherein, the sliding channel is formed between the first upper stop and the first lower stop; the sliding buckle protrudes relative to the second protective part in the first horizontal direction.

3. The battery and underbody system protection structure according to claim 2, characterized in that, The first lower stop bar has an installation channel that communicates with the sliding channel. The installation channel extends through the first lower stop bar along the height direction, so that the sliding buckle enters the sliding channel along the height direction through the installation channel.

4. The battery and underbody system protection structure according to claim 2, characterized in that, The first upper stop bar and the first lower stop bar are respectively formed with flanges facing into the sliding channel.

5. The battery and underbody system assembly protection structure according to claim 4, characterized in that, The sliding buckle includes: a main body connected to the second protective part and protruding from the second protective part in the first direction; an upper hooking part protruding from the upper end face of the main body to abut against the upper side of the sliding channel in the height direction and hooking into the flange of the first upper stop bar in the first horizontal direction; and a lower hooking part protruding from the lower end face of the main body to abut against the lower side of the sliding channel in the height direction and hooking into the flange of the first lower stop bar in the second horizontal direction.

6. The battery and underbody system protection structure according to claim 5, characterized in that, The sliding buckle is integrally formed; the edge region of the second protective part is integrally formed with an upwardly extending first stamped protrusion, one edge of the first stamped protrusion is open, and the main body of the sliding buckle is fixedly connected to the open edge of the first stamped protrusion.

7. The battery and underbody system protection structure according to claim 1, characterized in that, The second side is provided with a second groove extending along the first horizontal direction; when the first protective part abuts against the second side, the edge of the first protective part is fitted into the second groove to position the bottom protective plate around the battery pack.

8. The battery and underbody system protection structure according to claim 7, characterized in that, The second slide body includes a second upper stop and a second lower stop that are spaced apart in the height direction; the edge region of the first protective part is integrally formed with an upwardly extending second stamped protrusion, one edge of the second stamped protrusion being open; wherein, when the first protective part abuts against the second side, the second stamped protrusion is embedded in the region between the second upper stop and the second lower stop, and the open edge of the second stamped protrusion abuts against the second side.

9. The battery and underbody system protection structure according to claim 1, characterized in that, At the junction of the first protective part and the second protective part, a clearance notch is formed to avoid the top corner of the battery pack.

10. A new energy vehicle, characterized in that, include: The battery and vehicle underbody system assembly protection structure as described in any one of claims 1 to 9; the first protective part and / or the second protective part are provided with connecting holes, the vehicle body, and the bottom bracket of the vehicle body is provided with screw holes adapted to the connecting holes.

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