A power battery pack

Abstract

This application discloses a power battery pack for use in electric vehicles, including a lock seat and a lock shaft mounted on the lock seat. The power battery pack is connected to the chassis of the electric vehicle via the lock shaft. The lock seat has a mounting hole, and the lock shaft has a shaft body passing through the mounting hole and a positioning member located outside the mounting hole. It also includes a protective member, which has a protective portion located between the positioning member and the lock seat. The protective portion has a through hole aligned with the mounting hole, and the protective portion abuts against both the positioning member and the lock seat. When the power battery pack vibrates relative to the lock seat due to the vehicle's shaking, causing the lock shaft to tend to have relative displacement with the lock seat, the positioning member abuts against the protective portion. The impact force relative to the lock seat caused by the lock shaft's vibration is transmitted to the protective portion located around the mounting hole, reducing the probability of stress concentration in the lock seat caused by the small stress transmission area between the lock shaft and the lock seat during vibration.

Description

Technical Field

[0001] This application belongs to the field of electric vehicle battery swapping technology, specifically relating to a power battery pack. Background Technology

[0002] In daily life, cars are becoming increasingly common, and the widespread use of gasoline-powered vehicles not only exacerbates the consumption of non-renewable resources but also pollutes the environment with exhaust emissions. Faced with the growing imbalance between supply and demand for traditional energy sources and the severe situation of global warming, electric vehicles (EVs) have emerged as a new energy mode of transportation. Due to their advantages such as low noise, high energy efficiency, and zero mobile exhaust emissions, EVs have become one of the strategic emerging industries that many countries prioritize. However, as EVs enter the market, driving range has become a significant factor hindering their development. Drawing inspiration from the traditional method of using refueling to extend the driving range of cars, for EVs, charging depleted battery packs or directly replacing them with fully charged ones has become a key research and development direction for increasing the driving range of EVs.

[0003] To facilitate the removal and replacement of battery packs from battery swapping vehicles, the battery pack is typically equipped with a locking axle. The bottom of the battery swapping vehicle has a lifting device adapted to the locking axle, which secures the battery pack to the bottom of the vehicle by lifting the locking axle. The cooperation between the lifting device and the locking axle improves the ease of battery pack installation and removal, contributing to increased battery pack replacement efficiency, and has become the choice for an increasing number of battery swapping vehicles. However, this approach presents the following problems: bumps and impacts experienced by the vehicle during operation are transmitted to the locking axle through the lifting device. The locking axle, subjected to the impact forces transmitted by the vehicle, experiences relative displacement with the battery pack. Furthermore, with the continuous vibration of the battery swapping vehicle, frequent impacts occur between the locking axle and the battery pack, which can easily lead to unstable connections between the locking axle and the battery pack, and generate significant noise, affecting the driving and passenger experience. Summary of the Invention

[0004] This application provides a power battery pack to solve the technical problem that the battery pack of a traditional electric vehicle is easily affected by vehicle vibration, resulting in an unstable connection with the vehicle.

[0005] The technical solution adopted in this application is as follows:

[0006] A power battery pack for use in an electric vehicle includes a lock seat and a lock shaft mounted on the lock seat, the power battery pack being attached to the chassis of the electric vehicle via the lock shaft; the lock seat has a mounting hole, the lock shaft has a shaft body passing through the mounting hole and a positioning member located outside the mounting hole; it also includes a protective member, the protective member having a protective portion located between the positioning member and the lock seat, the protective portion having a through hole aligned with the mounting hole, the protective portion abutting against the positioning member and the lock seat respectively.

[0007] The power battery pack of this application is equipped with a lock seat and a lock shaft. The lock shaft is attached to the chassis of the electric vehicle, allowing for quick removal and installation of the power battery pack from the bottom of the vehicle. This improves the battery pack replacement speed and thus the battery swapping speed of the electric vehicle. The lock seat has mounting holes through which the lock shaft passes for installation. A positioning element is provided outside the mounting holes to prevent the lock shaft from dislodging due to vehicle vibration or bumps, thus ensuring the installation stability of the power battery pack. Furthermore, the power battery pack of this application also includes a protective element with a protective section. The lock shaft passes through the mounting holes and the through-hole of the protective section, with the positioning element abutting against the protective section. In this way, when the power battery pack vibrates relative to the lock seat due to vehicle vibration, causing a tendency for relative displacement between the lock shaft and the lock seat, the positioning element abuts against the protective section. The impact force relative to the lock seat caused by the vibration of the lock shaft is transmitted to the protective section located around the mounting holes and then evenly diffused towards the lock seat through the protective section. This reduces the probability of stress concentration in the lock seat caused by the small stress transmission area between the lock shaft and the lock seat when vibration occurs, thus ensuring the service life of the lock seat and improving the connection stability between the power battery pack and the vehicle. Furthermore, because the protective part abuts against both the positioning component and the lock seat, the positioning component is restricted by the protective part and cannot move relative to the protective component or the lock seat. This avoids noise caused by relative movement between the lock shaft and the protective component or lock seat, contributing to a better driving and passenger experience.

[0008] The power battery pack described in this application also includes the following additional technical features:

[0009] The protective component also includes a protective sleeve located within the mounting hole, the protective sleeve extending along the length of the shaft and abutting against the inner wall of the mounting hole and the shaft respectively.

[0010] By installing a protective sleeve, the axle can be partially covered, increasing the contact area between the axle and the lock seat. When the axle receives vibrations and impacts transmitted from the vehicle, it tends to shift relative to the lock seat. The protective sleeve, which abuts against both the axle and the mounting hole, restricts axle displacement, increasing the connection stability between the axle and the lock seat. It also prevents noise caused by the axle colliding with the inner wall of the mounting hole, further reducing noise transmission from the vehicle's underside to the passenger compartment, thus enhancing the driving and passenger experience.

[0011] The protective sleeve is integrally formed with the protective part, and the protective sleeve is connected to the lock seat by welding.

[0012] By designing the protective sleeve as an integral part of the protective unit, the assembly of the sleeve and the unit is eliminated, reducing the difficulty of processing and assembling the protective component while improving its structural strength. Furthermore, the protective sleeve and lock seat are connected by welding, enhancing the connection stability and making the protective component and lock seat an integrated unit, thus increasing the tightness of the connection. Simultaneously, during the assembly of the power battery pack, the separate assembly of the protective component and lock seat is eliminated, increasing the assembly speed of the power battery pack.

[0013] The shaft has a first end and a second end located on two opposite sides of the shaft. The positioning member includes a first positioning member near the first end and a second positioning member located at the second end. The first positioning member is detachably connected to the shaft, and the second positioning member is fixedly connected to the shaft.

[0014] When installing the lock shaft, insert the first end of the shaft into the mounting hole, and then install the first positioning component onto the shaft to assemble the lock shaft. Making the first positioning component detachably connected to the shaft facilitates insertion into the mounting hole and avoids any interference with the shaft installation process. Conversely, making the second positioning component fixedly connected to the shaft enhances the connection strength between the second positioning component and the shaft, increasing the installation stability of the lock shaft.

[0015] The locking shaft also includes a limiting member disposed at the first end. The limiting member is detachably connected to the shaft body. When the limiting member is installed on the shaft body, the first positioning member abuts against the limiting member and the protective part respectively.

[0016] By setting a limiting member that is detachably connected to the shaft, after the shaft passes through the mounting hole and the first positioning member is installed on the shaft, the limiting member is installed on the shaft to abut against the protective part, that is, the limiting member functions to lock the position of the first positioning member. The limiting member abuts the first positioning member to keep it stable in the preset position, so that the first positioning member can cooperate with the second positioning member to lock the position of the shaft.

[0017] The limiting component includes a limiting insert shaft and a limiting seat sleeved on the shaft body. The shaft body has a limiting hole, and the limiting insert shaft is inserted into the limiting hole and abuts against the limiting seat and the first positioning component.

[0018] The limiting component is configured to include a limiting seat sleeved on the shaft and a limiting insert shaft inserted into the limiting hole, so that the limiting seat and the first positioning component have a large contact area, thereby enabling the limiting seat to provide a more stable abutting force for the first positioning component to keep it in contact with the protective part; and the setting of the limiting insert shaft and the limiting hole reduces the difficulty of disassembling and assembling the limiting component and the shaft, so that the limiting component can be easily disassembled and assembled with the shaft, thereby realizing the quick assembly of the locking shaft.

[0019] The lock base includes two opposing support plates, with a clearance opening formed between the two support plates above the lock shaft. The two support plates are respectively provided with opposing mounting holes, and the number of protective components is two, each located on one of the two support plates.

[0020] The locking shaft passes sequentially through the mounting holes on the two support plates and is fixed to them. This reduces the load-bearing pressure of a single support plate on the locking shaft and decreases the likelihood of stress concentration between the locking shaft and the support plates, thus improving the lifting stability of the power battery pack. Furthermore, the clearance opening provides lifting space for the lifting components at the bottom of the vehicle, allowing them to extend into the locking shaft and engage with it during lifting. The two protective components provide separate protection for the mounting holes on the two support plates, thus protecting both the locking shaft and the two support plates.

[0021] The support plate extends from one end to the other along the length of the power battery pack, and the support plate is provided with a plurality of mounting holes at intervals.

[0022] Multiple mounting holes are spaced apart along the extension direction of the support plate, and each mounting hole is equipped with a locking shaft. The vehicle can be lifted using multiple lifting components that engage with these locking shafts. This reduces the lifting force required by each locking shaft, thus lowering the load on individual shafts. Furthermore, the synchronized, spaced arrangement of multiple locking shafts along the length of the battery pack ensures a uniform distribution of lifting force, reducing the probability of tilting due to uneven force distribution and improving the stability of the battery pack during lifting.

[0023] The power battery pack includes multiple battery pack receiving cavities, and adjacent battery pack receiving cavities are separated by a partition beam. The partition beam includes a first roller pressing body, which is a structure integrally rolled and pressed. The support plate is a part of the first roller pressing body.

[0024] The power battery pack is configured to include multiple battery pack cavities, allowing each cavity to accommodate an independent battery pack, which helps to increase the battery pack's capacity. Separating the battery pack cavities with partition beams enhances the independence of each cavity. The partition beams include a first roll-pressed body made of one piece, with the support plate as part of the first roll-pressed body, which significantly improves the structural strength of the partition beams and the support plate, thereby enhancing the connection stability between the power battery pack and the vehicle.

[0025] The first roller press body also includes an annular support structure located at the bottom of the bearing plate, and one of the two bearing plates is connected to the annular support structure by a bottom plate bent by roller pressing.

[0026] The bottom of the load-bearing plate is equipped with a ring-shaped support structure. While ensuring the structural strength of the partition beam, the ring-shaped support structure has an internal cavity, which reduces the self-weight of the partition beam and thus reduces the load pressure on the power battery pack from the vehicle.

[0027] The power battery pack is divided into multiple battery pack housing layers by a partition plate extending in the horizontal direction, and each battery pack housing layer has multiple battery pack housing cavities; the annular support structure has a first support portion located above and a second support portion located below, the first support portion and the second support portion are staggered to form a boss between them, and the partition plate overlaps the boss.

[0028] The multiple battery pack housing layers provide more storage space for the power battery pack, while the partition plate design provides relatively independent storage space for the upper and lower battery pack housing cavities. The protrusion formed between the staggered first and second support parts of the annular support structure provides a mounting position for the partition plate, eliminating the need for separate installation components for the user to install the partition plate and helping to optimize the structural design of the power battery pack.

[0029] The separator beam also includes a second roll forming body located below the first roll forming body, the second roll forming body being an integrally roll forming structure.

[0030] The second roll forming is integrally molded and also has high structural strength, which helps to increase the overall structural strength of the separator beam and increase the connection stability between the separator beam and the main body of the power battery pack.

[0031] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0032] The power battery pack of this application is equipped with a lock seat and a lock shaft. The lock shaft is attached to the chassis of the electric vehicle, allowing for quick removal and installation of the battery pack from the bottom of the vehicle, thus improving the battery pack replacement speed and consequently the battery swapping speed of the electric vehicle. The lock seat has mounting holes through which the lock shaft passes for installation. A positioning element is provided outside the mounting holes to prevent the lock shaft from dislodging due to vehicle vibration or bumps, ensuring the installation stability of the battery pack. Furthermore, the power battery pack of this application also includes a protective element with a protective section. The lock shaft passes through the mounting holes and the through-hole of the protective section, with the positioning element abutting against the protective section. In this way, when the power battery pack vibrates relative to the lock seat due to vehicle vibration, causing a tendency for relative displacement between the lock shaft and the lock seat, the positioning element abuts against the protective section. The impact force relative to the lock seat caused by the vibration of the lock shaft is transmitted to the protective section located around the mounting holes and then evenly diffused towards the lock seat through the protective section. This reduces stress concentration in the lock seat caused by the small stress transmission area between the lock shaft and the lock seat when vibration occurs, thus ensuring the service life of the lock seat and improving the connection stability between the power battery pack and the vehicle. Furthermore, because the protective part abuts against both the positioning component and the lock seat, the positioning component is restricted by the protective part and cannot move relative to the protective component or the lock seat. This avoids noise caused by relative movement between the lock shaft and the protective component or lock seat, improving the driving and passenger experience. Attached Figure Description

[0033] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0034] Figure 1 This is a schematic diagram of the structure of a power battery pack according to one embodiment of this application;

[0035] Figure 2 This is a schematic diagram of the structure of a power battery pack in one embodiment of this application;

[0036] Figure 3 for Figure 2 Enlarged view of part A;

[0037] Figure 4 This is a cross-sectional view of a power battery pack according to one embodiment of this application;

[0038] Figure 5 for Figure 4 Enlarged view of part B;

[0039] Figure 6 for Figure 4 Enlarged view of part C.

[0040] in:

[0041] 1. Lock base; 11. Mounting holes; 12. Support plate;

[0042] 2. Locking shaft, 21. Shaft body, 211. First end, 212. Second end, 22. Positioning component, 221. First positioning component, 222. Second positioning component, 23. Limiting component, 231. Limiting insert shaft, 232. Limiting seat;

[0043] 3. Protective components, 31. Protective parts, 32. Protective sleeves;

[0044] 4. Avoidance openings;

[0045] 5. Battery pack housing cavity;

[0046] 6. First roller body;

[0047] 7. Ring-shaped support structure; 71. First support part; 72. Second support part; 73. Boss;

[0048] 8 battery pack housing layers;

[0049] 9. Second roller body;

[0050] 10. Divider. Detailed Implementation

[0051] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0052] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0053] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0054] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0056] like Figures 1 to 5 As shown, a power battery pack is used in an electric vehicle, including a lock seat 1 and a lock shaft 2 installed on the lock seat 1. The power battery pack is connected to the chassis of the electric vehicle via the lock shaft 2. The lock seat 1 is provided with a mounting hole 11. The lock shaft 2 has a shaft body 21 passing through the mounting hole 11 and a positioning member 22 located outside the mounting hole 11. It also includes a protective member 3, which has a protective part 31 located between the positioning member 22 and the lock seat 1. The protective part 31 has a through hole that aligns with the mounting hole 11. The protective part 31 abuts against the positioning member 22 and the lock seat 1 respectively.

[0057] The power battery pack of this application includes a locking seat 1, on which a locking shaft 2 is mounted. The locking shaft 2 is connected to the chassis of the electric vehicle, allowing for quick removal and installation of the power battery pack from the bottom of the vehicle, thus improving the battery pack replacement speed and consequently the battery swapping speed of the electric vehicle. The locking seat 1 has mounting holes 11 through which the locking shaft 2 passes to be installed on the locking seat 1. A positioning element 22 is provided outside the mounting holes 11 to prevent the locking shaft 2 from dislodging due to vehicle vibration or bumps, thus ensuring the installation stability of the power battery pack. Furthermore, the power battery pack of this application also includes a protective element 3 with a protective section 31. The locking shaft 2 passes sequentially through the mounting holes 11 and the through-hole of the protective section 31, with the positioning element 22 abutting against the protective section 31. In this way, when the power battery pack vibrates relative to the lock seat 1 due to the bumps and swaying of the vehicle body, causing the lock shaft 2 to tend to displace relative to the lock seat 1, the positioning member 22 abuts against the protective part 31. The impact force of the lock shaft 2 vibrating relative to the lock seat 1 is transmitted to the protective part 31 located around the mounting hole 11, and then evenly diffused to the lock seat 1 through the protective part 31. This reduces the probability of stress concentration in the lock seat 1 caused by the small stress transmission area between the lock shaft 2 and the lock seat 1 when vibration occurs, ensuring the service life of the lock seat 1 and thus helping to improve the connection stability between the power battery pack and the vehicle. Furthermore, since the protective part 31 abuts against both the positioning member 22 and the lock seat 1, the positioning member 22 is restricted by the protective part 31 and cannot displace relative to the protective member 3 and the lock seat 1. Therefore, noise caused by the relative movement of the lock shaft 2 with the protective member 3 or the lock seat 1 is avoided, which helps to improve the riding experience of the driver and passengers.

[0058] Preferably, the protective part 31 has a sheet-like structure, and the projection of the positioning member 22 toward the lock seat 1 falls on the protective part 31. That is, the projection of the protective part 31 toward the positioning member 22 covers the positioning member 22, so that the protective part 31 can achieve all-round protection for the positioning member 22.

[0059] As a preferred embodiment of this application, such as Figure 5As shown, the protective component 3 also includes a protective sleeve 32 located within the mounting hole 11. The protective sleeve 32 extends along the length of the shaft 21 and abuts against the inner wall of the mounting hole 11 and the shaft 21, respectively. By providing the protective sleeve 32, the shaft 21 can be partially covered, increasing the contact area between the shaft 21 and the lock seat 1. When the shaft 21 receives vibration and impact transmitted from the vehicle, the shaft 21 will tend to shift relative to the lock seat 1. By providing the protective sleeve 32, and with the protective sleeve 32 abutting against both the shaft 21 and the mounting hole 11, the displacement of the shaft 21 is restricted, increasing the connection stability between the shaft 21 and the lock seat 1. At the same time, it avoids noise caused by the relative collision between the shaft 21 and the inner wall of the mounting hole 11, further reducing noise transmission from the bottom of the vehicle to the driver's cabin, thereby further improving the riding experience of the driver and passengers.

[0060] In a preferred embodiment of this invention, the protective sleeve 32 and the protective part 31 are integrally formed, and the protective sleeve 32 and the lock seat 1 are connected by welding. By making the protective sleeve 32 integrally formed with the protective part 31, the operation of assembling the protective sleeve 32 and the protective part 31 is eliminated, reducing the processing and assembly difficulty of the protective component 3 and improving the structural strength of the protective component 3. Furthermore, by welding the protective sleeve 32 and the lock seat 1, the connection stability between the protective sleeve 32 and the lock seat 1 is enhanced, making the protective component 3 and the lock seat 1 integrated and increasing the tightness of the connection. Simultaneously, during the assembly of the power battery pack, the operation of connecting and assembling the protective component 3 and the lock seat 1 is eliminated, increasing the assembly speed of the power battery pack.

[0061] In this embodiment, during the assembly of the power battery pack, the protective component 3 is first inserted into the mounting hole 11 from one side until the protective part 31 abuts against the lock seat 1. Then, the protective sleeve 32 is welded to the lock seat 1. After the protective component 3 is welded, the shaft 21 is inserted into the protective sleeve 32 until the positioning component 22 abuts against the protective part 31.

[0062] As a preferred embodiment of this application, such as Figure 5As shown, the shaft 21 has a first end 211 and a second end 212 located on two opposite sides of the shaft 21. The positioning member 22 includes a first positioning member 221 near the first end 211 and a second positioning member 222 located at the second end 212. The first positioning member 221 is detachably connected to the shaft 21, and the second positioning member 222 is fixedly connected to the shaft 21. When installing the locking shaft 2, the first end 211 of the shaft 21 is inserted into the mounting hole 11, and then the first positioning member 221 is installed on the shaft 21, thus realizing the assembly of the locking shaft 2. Setting the first positioning member 221 to be detachably connected to the shaft 21 facilitates the insertion of the shaft 21 into the mounting hole 11 and avoids the first positioning member 221 affecting the installation process of the shaft 21. Setting the second positioning member 222 to be fixedly connected to the shaft 21 can enhance the connection strength between the second positioning member 222 and the shaft 21 and increase the installation stability of the locking shaft 2.

[0063] As a preferred embodiment of this implementation, such as Figure 5 As shown, the locking shaft 2 also includes a limiting member 23 located at the first end 211. The limiting member 23 is detachably connected to the shaft body 21. When the limiting member 23 is installed on the shaft body 21, the first positioning member 221 abuts against the limiting member 23 and the protective part 31 respectively. By providing the limiting member 23 detachably connected to the shaft body 21, after the shaft body 21 passes through the mounting hole 11 and the first positioning member 221 is installed on the shaft body 21, the limiting member 23 is installed on the shaft body 21 to abut against the first positioning member 221 and the protective part 31. That is, the limiting member 23 functions to lock the position of the first positioning member 221. The limiting member 23 abuts against the first positioning member 221 to keep it stable in a preset position, so that the first positioning member 221 can cooperate with the second positioning member 222 to lock the position of the shaft body 21.

[0064] Preferably, such as Figure 5 As shown, the limiting member 23 includes a limiting insert 231 and a limiting seat 232 sleeved on the shaft body 21. The shaft body 21 has a limiting hole, and the limiting insert 231 is inserted into the limiting hole and abuts against the limiting seat 232 and the first positioning member 221. By configuring the limiting member 23 to include the limiting seat 232 sleeved on the shaft body 21 and the limiting insert 231 inserted into the limiting hole, the limiting seat 232 and the first positioning member 221 have a larger contact area, thereby enabling the limiting seat 232 to provide a more stable abutting force for the first positioning member 221 to maintain its abutment against the protective part 31. The setting of the limiting insert 231 and the limiting hole reduces the difficulty of disassembling and assembling the limiting member 23 and the shaft body 21, allowing the limiting member 23 to be disassembled and assembled with the shaft body 21 more easily, thereby realizing the quick assembly of the locking shaft 2.

[0065] Furthermore, the limiting seat 232 is provided with multiple clearance grooves along its circumference, and the limiting insert shaft 231 passes through the clearance grooves and the limiting hole. By providing multiple clearance grooves, it is not necessary to precisely align the position of the limiting seat 232 when installing it. It is only necessary to ensure that one of the multiple clearance grooves aligns with the limiting hole, which helps to reduce the assembly difficulty of the limiting seat 232.

[0066] As a preferred embodiment of this application, such as Figure 3 As shown, the lock base 1 includes two opposing support plates 12, with a clearance opening 4 formed between the two support plates 12 above the lock shaft 2. The two support plates 12 each have opposing mounting holes 11. Two protective members 3 are respectively located on the two support plates 12. The lock shaft 2 passes through the mounting holes 11 on the two support plates 12 and is fixed to them, reducing the load-bearing pressure of a single support plate 12 on the lock shaft 2 and reducing the possibility of stress concentration between the lock shaft 2 and the support plates 12, thus improving the lifting stability of the power battery pack. Furthermore, the clearance opening 4 provides lifting space for the lifting components at the bottom of the vehicle, allowing the lifting components to extend into the lock shaft 2 and engage with it during lifting. The two protective members 3 provide separate protection for the mounting holes 11 on the two support plates 12, thus protecting both the lock shaft 2 and the two support plates 12.

[0067] Preferably, the lock base 1 further includes a connecting plate located on the top of the two support plates 12, the connecting plate being connected to the two support plates 12 respectively, and the connecting plate having an clearance opening 4 at the lock shaft 2.

[0068] As a preferred embodiment of this implementation, such as Figure 2 , Figure 3 As shown, the support plate 12 extends from one end to the other along the length of the power battery pack, and a plurality of mounting holes 11 are spaced apart on the support plate 12. The mounting holes 11 are multiple and spaced apart along the extension direction of the support plate 12. Each mounting hole 11 is equipped with a locking shaft 2, allowing the vehicle to lift the power battery pack by cooperating with multiple lifting components and multiple locking shafts 2. This reduces the lifting force required by each locking shaft 2, thereby reducing the load on a single locking shaft 2. Furthermore, the simultaneous and spaced arrangement of multiple locking shafts 2 along the length of the power battery pack achieves a uniform distribution of lifting force, reducing the probability of tilting caused by uneven lifting force distribution and improving the lifting stability of the power battery pack.

[0069] As a preferred example in this embodiment, such as Figure 2As shown, the power battery pack includes multiple battery pack receiving cavities 5, with adjacent battery pack receiving cavities 5 separated by a partition beam. The partition beam includes a first roller pressing body 6, which is a one-piece roller-pressed structure, and the support plate 12 is a part of the first roller pressing body 6. By configuring the power battery pack to include multiple battery pack receiving cavities 5, each cavity can individually accommodate an independent battery pack, which helps to increase the battery pack's capacity. Furthermore, separating the battery pack receiving cavities 5 with partition beams enhances the independence of each cavity. The partition beam, including the one-piece roller pressing body 6 and with the support plate 12 as part of the first roller pressing body 6, significantly improves the structural strength of the partition beam and also increases the structural strength of the support plate 12, enhancing the connection stability between the power battery pack and the vehicle.

[0070] As a preferred method in this example, such as Figure 6 As shown, the first roller press 6 also includes an annular support structure 7 located at the bottom of the support plate 12. One of the two support plates 12 is connected to the annular support structure 7 by a bottom plate bent by roller pressing. The annular support structure 7 is provided at the bottom of the support plate 12. The annular support structure 7 has a cavity inside while ensuring the structural strength of the separator beam, which reduces the self-weight of the separator beam and thus reduces the load pressure of the vehicle on the power battery pack.

[0071] Preferably, such as Figure 2 , Figure 4 , Figure 6 As shown, the power battery pack is divided into multiple battery pack housing layers 8 by a horizontally extending partition plate 10, each battery pack housing layer 8 having multiple battery pack housing cavities 5. The annular support structure 7 has a first support portion 71 located above and a second support portion 72 located below. The first support portion 71 and the second support portion 72 are staggered to form a boss 73 between them, and the partition plate 10 overlaps with the boss 73. The arrangement of multiple battery pack housing layers 8 provides more battery pack housing space for the power battery pack, and the arrangement of the partition plate 10 provides relatively independent housing space for the upper and lower battery pack housing cavities 5. The boss 73 formed between the staggered first support portion 71 and the second support portion 72 of the annular support structure 7 provides a mounting position for the partition plate 10, eliminating the need for separate installation components for user installation of the partition plate 10, and helping to optimize the structural design of the power battery pack.

[0072] Furthermore, such as Figure 6As shown, the separator beam also includes a second roll forming body 9 located below the first roll forming body 6. The second roll forming body 9 is an integrally roll-formed structure. The integrally formed second roll forming body 9 also possesses high structural strength, which helps to increase the overall structural strength of the separator beam and the connection stability between the separator beam and the main body of the power battery pack. Specifically, the power battery pack includes a base, and the second roll forming body 9 is welded to both the base and the first roll forming body 6.

[0073] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0074] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0075] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A power battery pack applied to an electric vehicle, characterized in that, The device includes a lock seat and a lock shaft mounted on the lock seat, wherein the power battery pack is connected to the chassis of an electric vehicle via the lock shaft; the lock seat has a mounting hole, and the lock shaft has a shaft body passing through the mounting hole and a positioning member located outside the mounting hole; it also includes a protective member, which has a protective portion located between the positioning member and the lock seat, the protective portion having a through hole aligned with the mounting hole, and the protective portion abutting against the positioning member and the lock seat respectively.

2. The power battery pack according to claim 1, characterized in that, The protective component also includes a protective sleeve located within the mounting hole, the protective sleeve extending along the length of the shaft and abutting against the inner wall of the mounting hole and the shaft respectively.

3. The power battery pack according to claim 2, characterized in that, The protective sleeve is integrally formed with the protective part, and the protective sleeve is connected to the lock seat by welding.

4. The power battery pack according to any one of claims 1 to 3, characterized in that, The shaft has a first end and a second end located on two opposite sides of the shaft. The positioning member includes a first positioning member near the first end and a second positioning member located at the second end. The first positioning member is detachably connected to the shaft, and the second positioning member is fixedly connected to the shaft.

5. The power battery pack according to claim 4, characterized in that, The locking shaft also includes a limiting member disposed at the first end. The limiting member is detachably connected to the shaft body. When the limiting member is installed on the shaft body, the first positioning member abuts against the limiting member and the protective part respectively.

6. The power battery pack according to claim 5, characterized in that, The limiting component includes a limiting insert shaft and a limiting seat sleeved on the shaft body. The shaft body has a limiting hole, and the limiting insert shaft is inserted into the limiting hole and abuts against the limiting seat and the first positioning component.

7. The power battery pack according to any one of claims 1 to 3, characterized in that, The lock base includes two opposing support plates, with a clearance opening formed between the two support plates above the lock shaft. The two support plates are respectively provided with opposing mounting holes. The number of protective components is two and they are respectively provided on the two support plates. Preferably, the support plate extends from one end to the other along the length of the power battery pack, and the support plate is provided with a plurality of mounting holes at intervals.

8. The power battery pack according to claim 7, characterized in that, The power battery pack includes multiple battery pack receiving cavities, and adjacent battery pack receiving cavities are separated by a partition beam. The partition beam includes a first roller pressing body, which is an integrally rolled structure, and the support plate is a part of the first roller pressing body. Preferably, the first roller press further includes an annular support structure located at the bottom of the bearing plate, and one of the two bearing plates is connected to the annular support structure by a bottom plate bent by roller pressing.

9. The power battery pack according to claim 8, characterized in that, The power battery pack is divided into multiple battery pack housing layers by a partition plate extending in the horizontal direction, and each battery pack housing layer has multiple battery pack housing cavities; the annular support structure has a first support portion located above and a second support portion located below, the first support portion and the second support portion are staggered to form a boss between them, and the partition plate overlaps the boss.

10. The power battery pack according to any one of claims 8 or 9, characterized in that, The separator beam also includes a second roll forming body located below the first roll forming body, the second roll forming body being an integrally roll forming structure.

Images