Power battery pack bottom protection device and vehicle
By designing a bottom protection device for the power battery pack to prevent ice formation and physical damage, the safety issue of the power battery pack in low-temperature environments has been solved, achieving improvements in both safety and convenience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG GEELY HLDG GRP CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-06-05
AI Technical Summary
The power battery pack located at the bottom of the vehicle is susceptible to ice cover and physical damage in low winter temperatures, which can affect the accuracy and safety of battery swapping and pose a safety risk.
Design a bottom protection device for a power battery pack, including a front bracket, a rear bracket, a bottom protective plate, and side baffles, which are fixed by buckles to prevent foreign objects from entering and protect the bottom of the battery pack from ice formation and physical damage.
It reduces the difficulty of battery swapping in winter, improves the safety of battery swapping, prevents impact damage to the bottom of the battery pack, ensures the safety of the battery pack, and enhances passenger safety. It has a simple structure, low cost, and is easy to disassemble and assemble.
Smart Images
Figure CN224323841U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vehicle body parts technology, specifically to a bottom protection device for a power battery pack and a vehicle. Background Technology
[0002] Currently, most new energy vehicles design their power battery packs at the bottom of the vehicle body to make reasonable use of the vehicle body space and to avoid the power battery pack from being collided with the vehicle in the event of an accident. However, this design has led to multiple potential risks in actual operation.
[0003] In low-temperature winter conditions, water, snow, or mud splashed from the ground onto the bottom of the battery pack when vehicles are driving. These liquids freeze and accumulate rapidly on the battery pack surface due to the low temperature, forming an ice layer. This phenomenon poses a significant challenge to the operation of battery swapping vehicles. Specifically, the ice layer causes the bottom surface of the battery pack to become uneven, directly affecting the gripping accuracy of the robotic arm at the swapping station and the stability of the battery pack during transport within the battery compartment. Simultaneously, the ice layer covers the battery pack's locking structure (each battery pack typically has multiple locking bodies), easily causing the unlocking gun to fail to unlock the locks. If one locking body unlocks successfully while the other is jammed by the ice, the battery pack may tilt or become stuck due to uneven force, potentially leading to a minor interruption of the swapping process or, in severe cases, damage to mechanical components or a battery pack falling off the vehicle.
[0004] Furthermore, the risk of physical damage to the bottom of the battery pack should not be ignored. Sprays of debris (such as gravel and sand) generated by tires rolling over the road surface at high speeds, and the contact between the chassis and the ground when the vehicle travels over bumpy or potholed roads, can all cause impacts to the bottom of the battery pack. Such damage may lead to deformation of the battery pack casing, peeling of the protective coating, and in extreme cases, even puncture of the cell casing, causing short circuits or electrolyte leakage, potentially triggering thermal runaway and ultimately seriously affecting vehicle safety and passenger safety. Utility Model Content
[0005] In view of this, the purpose of this application is to provide a bottom protection device for a power battery pack and a vehicle to solve at least one of the above-mentioned technical problems.
[0006] In a first aspect, this application provides a bottom protection device for a power battery pack, comprising: a front bracket assembly, including a front bracket and a plurality of front latches, the front bracket being installed on the bottom of the vehicle body extending along the width direction and disposed on the front side of the power battery pack, the plurality of front latches being installed on the front bracket; a rear bracket assembly, including a rear bracket and a plurality of rear latches, the rear bracket being installed on the bottom of the vehicle body extending along the width direction and disposed on the rear side of the power battery pack, the plurality of rear latches being installed on the rear bracket; a bottom guard plate assembly, including a bottom guard plate and a plurality of latches, the bottom guard plate being detachably installed on the front bracket and the rear bracket for providing safety protection for the bottom of the power battery pack, the plurality of latches being installed on the bottom guard plate and cooperating with the plurality of front latches and the plurality of rear latches to fix the bottom guard plate; and a side panel, disposed on the bottom guard plate and connected to the front bracket and the rear bracket for preventing foreign objects from entering the gap between the bottom guard plate and the bottom of the power battery pack.
[0007] In conjunction with the first aspect, in some optional embodiments, the front bracket includes a front guide rail, two front body connecting parts, and a front side guard connecting part. The front guide rail extends along the width direction of the vehicle body and has a front guide groove on its side corresponding to the rear direction of the vehicle body. The front guide groove extends along the width direction of the vehicle body and has an open end and a closed end. The front guide groove is for the front edge of the underbody protection plate to be inserted and installed. The two front body connecting parts are respectively connected to the two ends of the top surface of the front guide rail and are used to connect with the vehicle body. The front side guard connecting part is located at the closed end of the front guide groove and is used to connect the front end of the side guard plate.
[0008] In conjunction with the first aspect, in some alternative embodiments, the front bracket also includes a front baffle portion, which is vertically connected to the top surface of the front guide rail portion and extends along the width direction of the vehicle body, for blocking airflow and foreign objects from entering the bottom of the vehicle body.
[0009] In conjunction with the first aspect, in some optional embodiments, the rear bracket includes a rear guide rail, two rear body connecting parts, and a rear side panel connecting part. The rear guide rail extends along the width direction of the vehicle body and has a rear guide groove on its side corresponding to the front direction of the vehicle body. The rear guide groove extends along the width direction of the vehicle body and has an open end and a closed end. The rear guide groove is for the rear edge of the underbody protection plate to be inserted and installed. The two rear body connecting parts are respectively connected to the two ends of the top surface of the rear guide rail and are used to connect with the vehicle body. The rear side panel connecting part is located at the closed end of the rear guide groove and is used to connect to the rear end of the side panel.
[0010] In conjunction with the first aspect, in some alternative embodiments, the rear bracket also includes a rear baffle portion, which is vertically connected to the top surface of the rear guide rail portion and extends along the width direction of the vehicle body, for blocking airflow and foreign objects from entering the bottom of the vehicle body.
[0011] In conjunction with the first aspect, in some optional embodiments, the underbody protection plate includes an underbody protection plate body and a side baffle portion. The underbody protection plate body is a rectangular plate with its front edge and rear edge inserted into a front guide groove opened on the front bracket and a rear guide groove opened on the rear bracket, respectively, along the width direction of the vehicle body. The side baffle portion is perpendicular to the underbody protection plate body and extends along one edge of the underbody protection plate body in the corresponding length direction of the vehicle body. The side baffle portion is used to prevent foreign objects from entering the gap between the underbody protection plate body and the bottom of the power battery pack.
[0012] In conjunction with the first aspect, in some alternative embodiments, the two ends of the side baffle portion respectively block the ends of the front guide groove and the rear guide groove to prevent foreign objects from entering the front guide groove and the rear guide groove.
[0013] In conjunction with the first aspect, in some alternative embodiments, the side panel extends along the opposite edge of the body length of the underbody body, and the side panel is provided with a clearance portion for avoiding the power battery pack and / or structures on the vehicle body.
[0014] Secondly, this application provides a vehicle, including a vehicle body, a power battery pack, and a bottom protection device for the power battery pack in any of the embodiments of the first aspect described above. The power battery pack is installed at the bottom of the vehicle body, and the bottom protection device for the power battery pack is installed at the bottom of the vehicle body to provide safety protection for the bottom of the power battery pack.
[0015] In conjunction with the second aspect, some optional embodiments also include a pad, which is disposed in the gap between the underbody protection plate and the bottom of the power battery pack to prevent the underbody protection plate from contacting the bottom of the power battery pack and to avoid resonance and abnormal noise between the underbody protection plate and the power battery pack during vehicle operation.
[0016] Based on the above technical solutions, the power battery pack bottom protection device and vehicle provided in this application can prevent water stains, snow or mud from freezing on the bottom surface of the power battery pack in low winter conditions, thus reducing the difficulty of battery swapping and improving the safety of battery swapping operations. It can also prevent the bottom of the power battery pack from being damaged by impacts, scratches or other physical damage, effectively ensuring the safety of the power battery pack, reducing the safety risks of the vehicle, and improving the safety of passengers. It has the characteristics of simple structure, low manufacturing cost, easy disassembly and assembly, and strong versatility. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of a bottom protection device for a power battery pack provided in an embodiment of this application.
[0019] Figure 2 This is a schematic diagram of the bottom structure of a power battery pack bottom protection device provided in an embodiment of this application.
[0020] Figure 3 This is an exploded structural diagram of a bottom protection device for a power battery pack provided in an embodiment of this application.
[0021] Figure 4 This is a schematic diagram of a front support assembly provided in an embodiment of this application.
[0022] Figure 5 This is a schematic diagram of a rear support assembly provided in an embodiment of this application.
[0023] Figure 6 This is a schematic diagram of the bottom structure of a bottom guard plate assembly provided in an embodiment of this application.
[0024] Figure 7 This is a schematic diagram of the structure of a side baffle provided in an embodiment of this application.
[0025] Figure 8 This is a schematic diagram of a power battery pack bottom protection device installed on the bottom of a vehicle body, as provided in an embodiment of this application.
[0026] Reference numerals: 1. Vehicle body; 100. Bottom protection device for power battery pack; 10. Front bracket assembly; 11. Front bracket; 111. Front guide rail; 1111. Front guide groove; 112. Front body connecting part; 1121. First profile; 1122. First connecting plate; 113. Front baffle part; 114. Front side baffle connecting part; 12. Front latch; 20. Rear bracket assembly; 21. Rear bracket; 211. Rear guide rail; 211 1. Rear guide groove; 212. Rear body connecting part; 2121. Second profile; 2122. Third profile; 2123. Second connecting plate; 2124. Reinforcing plate; 213. Rear baffle part; 214. Rear side baffle connecting part; 22. Rear latch; 30. Underbody protection plate assembly; 31. Underbody protection plate; 311. Underbody protection plate body; 312. Side baffle part; 32. Latlock; 40. Side baffle; 41. Clearance part; 42. Reinforcing plate part. Detailed Implementation
[0027] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of this application, and not all of them. Based on the description of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.
[0028] In the description of this application, unless otherwise expressly specified and limited, the terms "connection," "setup," "installation," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0029] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “center,” “top,” “bottom,” “inner,” “outer,” “vertical,” “horizontal,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, 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. Therefore, they should not be construed as limitations on this application.
[0030] The terms “first,” “second,” “third,” etc., are used only to distinguish elements with similar properties, and do not indicate or imply relative importance or a specific order, unless otherwise explicitly stated or limited.
[0031] The terms “comprising,” “including,” “having,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0032] The term "multiple" means two or more (including two).
[0033] The term "and / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone.
[0034] The terms "an embodiment," "as an example," and "in one implementation" refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which may be included in at least one embodiment or example of this application. These illustrative expressions do not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Where there is no conflict, the embodiments and features described in these embodiments can be combined in a suitable manner.
[0035] Figure 1 This is a schematic diagram of the structure of a bottom protection device 100 for a power battery pack provided in an embodiment of this application. Figure 2 This is a schematic diagram of the bottom structure of a power battery pack bottom protection device 100 provided in an embodiment of this application. Figure 3 This is an exploded structural diagram of a bottom protection device 100 for a power battery pack provided in an embodiment of this application, as shown below. Figures 1 to 3 As shown in the figure, this application provides a bottom protection device 100 for a power battery pack, including a front bracket assembly 10, a rear bracket assembly 20, a bottom protection plate assembly 30, and a side baffle 40.
[0036] The front bracket assembly 10 includes a front bracket 11 and multiple front latches 12. The front bracket 11 is installed along the width direction of the vehicle body at the bottom of the vehicle body and is located on the front side of the power battery pack. The multiple front latches 12 are installed on the front bracket 11. The rear bracket assembly 20 includes a rear bracket 21 and multiple rear latches 22. The rear bracket 21 is installed along the width direction of the vehicle body at the bottom of the vehicle body and is located on the rear side of the power battery pack. The multiple rear latches 22 are installed on the rear bracket 21. The underbody protection assembly 30 includes an underbody protection plate 31 and multiple latches 32. The underbody protection plate 31 is detachably installed on the front bracket 11 and the rear bracket 21 to provide safety protection for the bottom of the power battery pack. The multiple latches 32 are installed on the underbody protection plate 31 and cooperate with the multiple front latches 12 and the multiple rear latches 22 to fix the underbody protection plate 31 and prevent the underbody protection plate 31 from falling off the front bracket 11 and the rear bracket 21. The side baffle 40 is connected to the front bracket 11 and the rear bracket 21 to prevent foreign objects (such as dust, rainwater, sand, etc.) from entering the gap between the bottom guard plate 31 and the bottom of the power battery pack. The following is a detailed description of each component.
[0037] The structure of the front bracket 11, as an example, is as follows: Figure 3 and Figure 4As shown, the front bracket 11 includes a front guide rail portion 111, two front body connecting portions 112, a front baffle portion 113, and a front side baffle connecting portion 114. The front guide rail portion 111 extends along the width direction of the vehicle body and has a front guide groove 1111 on its side corresponding to the rear direction of the vehicle body. The front guide groove 1111 extends along the width direction of the vehicle body and has one open end and the other closed end. The front guide groove 1111 is for the front edge of the underbody protection plate 31 to be inserted and installed. The two front body connecting portions 112 are distributed at both ends of the top surface of the front guide rail portion 111. The bottom of each front body connecting portion 112 is connected to the front guide rail portion 111, and the top of the front body connecting portion 112 is used to connect to the vehicle body by fasteners. The front baffle portion 113 is vertically connected to the top surface of the front guide rail portion 111 and extends along the width direction of the vehicle body. The front baffle portion 113 is used to block airflow from entering the bottom of the vehicle body, reduce the vibration of the underbody protection plate 31 caused by airflow, and prevent foreign objects from entering the bottom of the vehicle body. The front side baffle connecting part 114 is connected to the front guide rail part 111 and is provided at the closed end of the front guide groove 1111. The front side baffle connecting part 114 is connected to the front end of the side baffle 40 by fasteners.
[0038] The various parts of the front bracket 11 can be made of low-carbon steel profiles and plates and welded together, which can reduce processing costs and effectively ensure structural strength.
[0039] Each front body connecting part 112 includes a first profile 1121 and a first connecting plate 1122. The first profile 1121 is vertically disposed on the top surface of the front guide rail part 111, the bottom of the first profile 1121 is welded to the front guide rail part 111, and the top of the first profile 1121 is welded to the first connecting plate 1122. The first connecting plate 1122 is horizontally arranged and extends along the length of the vehicle body. The first connecting plate 1122 has a plurality of first connecting holes, which are used to connect to the pre-reserved process holes at the bottom of the vehicle body through T-bolts and nuts.
[0040] The arrangement of the front latch 12, as an example, is as follows: Figure 4 As shown, there are two front latches 12, which are distributed at both ends of the bottom surface of the front guide rail 111. Each front latch 12 is connected to the front guide rail 111 by a fastener.
[0041] The structure of the rear bracket 21, as an example, is as follows: Figure 3 and Figure 5As shown, the rear bracket 21 includes a rear guide rail portion 211, two rear body connecting portions 212, a rear baffle portion 213, and a rear side baffle connecting portion 214. The rear guide rail portion 211 extends along the width direction of the vehicle body and has a rear guide groove 2111 on its side corresponding to the front direction of the vehicle body. The rear guide groove 2111 extends along the width direction of the vehicle body and has one open end and the other closed end. The rear guide groove 2111 is for the rear edge of the underbody protection plate 31 to be inserted and installed. The two rear body connecting portions 212 are distributed at both ends of the top surface of the rear guide rail portion 211. The bottom of each rear body connecting portion 212 is connected to the rear guide rail portion 211, and the top of the rear body connecting portion 212 is used to connect to the vehicle body by fasteners. The rear baffle portion 213 is vertically connected to the top surface of the rear guide rail portion 211 and extends along the width direction of the vehicle body. The rear baffle portion 213 is used to block airflow from entering the bottom of the vehicle body, reduce the vibration of the underbody protection plate 31 caused by airflow, and prevent foreign objects from entering the bottom of the vehicle body. The rear side stop connecting part 214 is connected to the rear guide rail part 211 and is provided at the closed end of the rear guide groove 2111. The rear side stop connecting part 214 is connected to the rear end of the side baffle 40 by fasteners.
[0042] The various parts of the rear bracket 21 can be made of low-carbon steel profiles and plates, and welded together, which can reduce processing costs and effectively ensure structural strength.
[0043] Each rear vehicle body connecting part 212 includes a second profile 2121, a third profile 2122, a second connecting plate 2123, and a reinforcing plate 2124. The second profile 2121 extends along the length of the vehicle body and is disposed on the top surface of the rear guide rail part 211, with its bottom welded to the rear guide rail part 211. The third profile 2122 is vertically disposed on the top of the second profile 2121, with its bottom welded to the second profile 2121 and its top welded to the second connecting plate 2123. The second connecting plate 2123 is horizontally arranged and extends along the width of the vehicle body, and has multiple second connecting holes for connecting to pre-drilled process holes at the bottom of the vehicle body using T-bolts and nuts. The reinforcing plate 2124 is welded to the third profile 2122 and the second connecting plate 2123. The reinforcing plate 2124 is used to enhance the connection strength between the third profile 2122 and the second connecting plate 2123.
[0044] The arrangement of the rear latch 22, as an example, is as follows: Figure 5 As shown, there are two rear latches 22, which are distributed at both ends of the bottom surface of the rear guide rail 211. Each rear latch 22 is connected to the rear guide rail 211 by a fastener.
[0045] The structure of the bottom guard plate 31, as an example, is as follows: Figure 3 and Figure 6As shown, the underbody protection plate 31 includes a main body 311 and a side baffle portion 312. The main body 311 is a rectangular plate. The front edge and rear edge of the main body 311 are inserted into the front guide groove 1111 of the front bracket 11 and the rear guide groove 2111 of the rear bracket 21, respectively, along the width direction of the vehicle body. The main body 311 is provided with a plurality of reinforcing ribs, which are arranged in parallel and each reinforcing rib extends along the length direction of the vehicle body. These reinforcing ribs can increase the structural strength of the main body 311. The side baffle portion 312 is vertically connected to the bottom guard plate body 311 and extends along the side edge of the corresponding front guide groove 1111 opening end and rear guide groove 2111 opening end of the bottom guard plate body 311. The side baffle portion 312 is used to prevent foreign objects from entering the gap between the bottom guard plate body 311 and the bottom of the power battery pack. The two ends of the side baffle portion 312 also block the opening ends of the front guide groove 1111 and the rear guide groove 2111 respectively to prevent foreign objects from entering the front guide groove 1111 and the rear guide groove 2111.
[0046] The bottom guard plate 31 can be made of a single piece of aluminum alloy by stamping, which can ensure structural strength, effectively reduce weight, and facilitate mass production.
[0047] The arrangement of latch 32, as an example, is as follows: Figure 2 and Figure 6 As shown, there are four latches 32, which are respectively arranged at the four corners of the bottom surface of the bottom cover plate body 311. Each latch 32 is connected to the bottom cover plate body 311 by fasteners. Among them, the two latches 32 near the front edge of the bottom cover plate body 311 engage with the two front latches 12, and the two latches 32 near the rear edge of the bottom cover plate body 311 engage with the two rear latches 22. When the four latches 32 are engaged with the corresponding front latches 12 or rear latches 22, the bottom cover plate 31 is fixed to the front bracket 11 and the rear bracket 21; when the four latches 32 are unlocked from the corresponding front latches 12 or rear latches 22, the bottom cover plate 31 can be removed from the front bracket 11 and the rear bracket 21.
[0048] Among them, the latch 32 can be a female latch, and the front latch 12 and the rear latch 22 are mating male latches, or the latch 32 can be a male latch, and the front latch 12 and the rear latch 22 are mating female latches.
[0049] The structure of the side baffle 40, as an example, is as follows: Figure 1 and Figure 7 As shown, combined with Figure 6The side baffle 40 is vertically mounted on the bottom guard plate body 311 and extends along the side edges of the corresponding closed ends of the front guide groove 1111 and the rear guide groove 2111 of the bottom guard plate body 311. The front and rear ends of the side baffle 40 are respectively connected to the front side baffle connecting part 114 of the front bracket 11 and the rear side baffle connecting part 214 of the rear bracket 21 by fasteners. Near both ends of the side baffle 40, there is a U-shaped avoidance part 41 that bends toward the side baffle part 312. The avoidance part 41 is used to avoid the power battery pack and / or the structure on the vehicle body. Each avoidance part 41 also has a reinforcing plate part 42 at the bend to enhance the connection strength at the bend.
[0050] In low-temperature winter environments, water stains, snow, or mud from the ground can easily splash onto the bottom of the battery pack when vehicles are driving. Due to the low temperature, these liquids will quickly freeze on the surface of the battery pack and form an ice layer, directly causing the bottom surface of the power battery pack to be uneven. This affects the gripping accuracy of the robotic arm at the battery swapping station and the stability of the power battery pack during transportation within the battery compartment of the station. At the same time, the ice layer covering the locking structure of the power battery pack can easily cause the unlocking gun to fail when unlocking the lock. The bottom protection device 100 of the power battery pack can prevent water stains, snow, or mud from freezing on the bottom surface of the power battery pack and forming an ice layer. Furthermore, when swapping the vehicle, the bottom protection plate assembly 30 can be pulled out, and the ice layer on it can fall off with the bottom protection plate 31 without affecting the vehicle's battery swapping. This reduces the difficulty of swapping the vehicle due to ice formation on the bottom of the battery in winter and also improves the safety of battery swapping operations.
[0051] For the flying debris (such as gravel and sand) generated by the tires rolling over the road surface when the vehicle is traveling at high speed, and for the contact between the chassis and the ground when the vehicle passes through bumpy or potholed road sections, the bottom protection device 100 of the power battery pack can prevent the bottom of the power battery pack from being subjected to physical damage such as impact and scratch, effectively ensuring the safety of the power battery pack, reducing the safety risks of the vehicle, and improving the safety of passengers.
[0052] Figure 8 This application provides a schematic diagram of a power battery pack bottom protection device 100 installed at the bottom of a vehicle body 1, as shown in the embodiment of the present application. Figure 8 As shown in the figure, this application embodiment also provides a vehicle, which includes a vehicle body 1, a power battery pack (not shown in the figure), and the aforementioned power battery pack bottom protection device 100. The power battery pack is installed at the bottom of the vehicle body 1, and the power battery pack bottom protection device 100 is installed at the bottom of the vehicle body 1 to provide safety protection for the bottom of the power battery pack.
[0053] The installation process of the bottom protection device 100 of the power battery pack on the bottom of the vehicle body 1 is illustrated as follows:
[0054] First, install the front bracket assembly 10 at the bottom of the vehicle body 1. Specifically, first, use rivets to fix the two front latches 12 to the bottom ends of the front guide rail portion 111 of the front bracket 11, forming the front bracket assembly 10. Then, take four T-bolts and insert them into the pre-drilled process holes at the bottom of the vehicle body 1. Next, align the first connecting holes on the two front body connecting portions 112 of the front bracket 11 with the four T-bolts, and use nuts to fasten the front bracket assembly 10 to the vehicle body 1. Before assembling the nuts, flat washers and spring washers should be added to prevent the nuts from loosening due to vibrations during vehicle operation.
[0055] Next, install the rear bracket assembly 20 at the bottom of the vehicle body 1: First, use rivets to fix the two rear latches 22 to the bottom ends of the rear guide rail portion 211 of the rear bracket 21, forming the rear bracket assembly 20. Then, take four T-bolts and insert them into the pre-drilled process holes at the bottom of the vehicle body 1. After that, align the second connecting holes on the two rear body connecting portions 212 of the rear bracket 21 with the four T-bolts, and use nuts to fasten the rear bracket assembly 20 to the vehicle body 1. Before assembling the nuts, flat washers and spring washers should be added to prevent the nuts from loosening due to vibrations during vehicle operation.
[0056] Next, the underbody protection plate assembly 30 is installed on the front bracket 11 and the rear bracket 21: First, four latches 32 are fixed to the four corners of the bottom surface of the underbody protection plate body 311 of the underbody protection plate 31 using rivets to form the underbody protection plate assembly 30. Then, the front edge and rear edge of the underbody protection plate 31 are inserted into the front guide groove 1111 of the front bracket 11 and the rear guide groove 2111 of the rear bracket 21 along the width direction of the vehicle body 1, respectively. After that, the four latches 32 are engaged with the corresponding front latch 12 or rear latch 22 to complete the fixing of the underbody protection plate 3331. A pad (not shown in the figure) can be placed in the gap between the underbody protection plate 31 and the bottom of the power battery pack. The pad can prevent the underbody protection plate 31 from directly contacting the bottom of the power battery pack, and can also effectively avoid resonance and abnormal noise between the underbody protection plate 31 and the power battery pack during vehicle operation. For example, the pad is a nylon pad.
[0057] Finally, the side baffle 40 is installed on the front bracket 11 and the rear bracket 21: the two ends of the side baffle 40 are connected and secured to the front side baffle connecting part 114 of the front bracket 11 and the rear side baffle connecting part 214 of the rear bracket 21 using bolts and nuts. Flat washers and spring washers should be added before assembling the nuts to prevent vibrations during vehicle operation from causing the nuts to loosen.
[0058] When a vehicle needs a battery swap, the operation procedure for the bottom protection device 100 of the power battery pack is as follows: Before the vehicle enters the battery swapping station, the station staff unlocks the four latches 32 with the corresponding front latches 12 or rear latches 22, and then removes the bottom protection plate assembly 30 from the opening end of the front guide groove 1111 of the front bracket 11 and the rear guide groove 2111 of the rear bracket 21 (pull it out laterally), exposing the power battery pack. Then the vehicle can enter the station for normal battery swapping. After the battery swap is completed, before the vehicle leaves the station, the station staff reinstalls the removed bottom protection plate assembly 30 onto the front bracket 11 and the rear bracket 21, and then engages the four latches 32 with the corresponding front latches 12 or rear latches 22.
[0059] Although disassembling and reassembling the underbody protection assembly 30 involves some work, it greatly improves the safety of vehicle battery swapping, ensures the cleanliness of the battery swapping station, and also avoids safety hazards caused by water droplets from the power battery pack dripping onto other electrical equipment inside the battery swapping station's battery compartment.
[0060] In summary, the power battery pack bottom protection device and vehicle provided in this application embodiment can prevent water stains, snow or mud from freezing on the bottom surface of the power battery pack in low winter conditions, thus reducing the difficulty of battery swapping and improving the safety of battery swapping operations. It can also prevent the bottom of the power battery pack from being damaged by impacts, scratches or other physical damage, effectively ensuring the safety of the power battery pack, reducing the safety risks of the vehicle, and improving the safety of passengers. It has the characteristics of simple structure, low manufacturing cost, easy disassembly and assembly, and strong versatility.
[0061] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application.
Claims
1. A bottom protection device for a power battery pack, characterized in that, include: A front bracket assembly includes a front bracket and a plurality of front latches, the front bracket being mounted on the bottom of the vehicle body extending along the width direction and positioned on the front side of the power battery pack, and the plurality of front latches being mounted on the front bracket; The rear bracket assembly includes a rear bracket and a plurality of rear latches, the rear bracket being mounted on the bottom of the vehicle body extending along the width direction and located on the rear side of the power battery pack, and the plurality of rear latches being mounted on the rear bracket; The bottom protection plate assembly includes a bottom protection plate and multiple latches. The bottom protection plate is detachably mounted on the front bracket and the rear bracket for safety protection of the bottom of the power battery pack. The multiple latches are mounted on the bottom protection plate and cooperate with the multiple front latches and the multiple rear latches to fix the bottom protection plate. as well as Side baffles, connected to the front and rear brackets, are used to prevent foreign objects from entering the gap between the bottom guard plate and the bottom of the power battery pack.
2. The bottom protection device for the power battery pack according to claim 1, characterized in that, The front bracket includes a front guide rail, two front body connecting parts, and a front side guard connecting part. The front guide rail extends along the width direction of the vehicle body and has a front guide groove on its side corresponding to the rear direction of the vehicle body. The front guide groove extends along the width direction of the vehicle body and has an open end and a closed end. The front guide groove is for the front edge of the underbody protection plate to be inserted and installed. The two front body connecting parts are respectively connected to the two ends of the top surface of the front guide rail and are used to connect with the vehicle body. The front side guard connecting part is located at the closed end of the front guide groove and is used to connect the front end of the side guard plate.
3. The bottom protection device for the power battery pack according to claim 2, characterized in that, The front bracket also includes a front baffle portion, which is vertically connected to the top surface of the front guide rail portion and extends along the width direction of the vehicle body, and is used to block airflow and foreign objects from entering the bottom of the vehicle body.
4. The bottom protection device for the power battery pack according to claim 1, characterized in that, The rear bracket includes a rear guide rail, two rear body connecting parts, and a rear side panel connecting part. The rear guide rail extends along the width of the vehicle body and has a rear guide groove on its side facing the front of the vehicle. The rear guide groove extends along the width of the vehicle body and has an open end and a closed end. The rear guide groove is for the rear edge of the underbody protection plate to be inserted and installed. The two rear body connecting parts are respectively connected to the two ends of the top surface of the rear guide rail and are used to connect with the vehicle body. The rear side panel connecting part is located at the closed end of the rear guide groove and is used to connect to the rear end of the side panel.
5. The bottom protection device for the power battery pack according to claim 4, characterized in that, The rear bracket also includes a rear baffle, which is vertically connected to the top surface of the rear guide rail and extends along the width of the vehicle body to block airflow and foreign objects from entering the bottom of the vehicle body.
6. The bottom protection device for the power battery pack according to claim 1, characterized in that, The underbody protection plate includes a main body and a side baffle. The main body is a rectangular plate with its front and rear edges inserted into the front guide groove on the front bracket and the rear guide groove on the rear bracket, respectively, along the width direction of the vehicle body. The side baffle is perpendicular to the main body and extends along one edge of the main body along the corresponding length direction of the vehicle body. The side baffle is used to prevent foreign objects from entering the gap between the main body and the bottom of the power battery pack.
7. The bottom protection device for a power battery pack according to claim 6, characterized in that, The two ends of the side baffle block the ends of the front guide groove and the rear guide groove respectively, in order to prevent foreign objects from entering the front guide groove and the rear guide groove.
8. The bottom protection device for a power battery pack according to claim 6, characterized in that, The side panel extends along the other side of the body length corresponding to the bottom guard plate body, and the side panel is provided with a clearance part, which is used to avoid the power battery pack and / or the structure on the vehicle body.
9. A vehicle, characterized in that, The device includes a vehicle body, a power battery pack, and a bottom protection device for the power battery pack as described in any one of claims 1-8, wherein the power battery pack is installed at the bottom of the vehicle body, and the bottom protection device for the power battery pack is installed at the bottom of the vehicle body to provide safety protection for the bottom of the power battery pack.
10. The vehicle according to claim 9, characterized in that, It also includes a pad, which is disposed in the gap between the bottom guard plate and the bottom of the power battery pack to prevent the bottom guard plate from contacting the bottom of the power battery pack and to avoid resonance and abnormal noise between the bottom guard plate and the power battery pack when the vehicle is running.