Power battery pack

Abstract

The utility model discloses a power battery pack which is applied to an electric vehicle and comprises a lock seat and a lock shaft mounted on the lock seat, and the power battery pack is hung on a chassis of the electric vehicle through the lock shaft; the lock seat is provided with a mounting hole, and the lock shaft is provided with a shaft body penetrating through the mounting hole and a positioning piece located on the outer side of the mounting hole. The lock further comprises a protection piece, the protection piece is provided with a protection part located between the positioning piece and the lock seat, the protection part is provided with a penetrating hole aligned to the mounting hole, and the protection part abuts against the positioning piece and the lock seat. When the power battery pack vibrates relative to the lock seat along with jolting and shaking of a vehicle body and causes the lock shaft to have a trend of relative displacement with the lock seat, the positioning piece abuts against the protection part, and impact force caused by vibration of the lock shaft relative to the lock seat can be transmitted to the protection part located around the mounting hole. And the occurrence probability of the stress concentration phenomenon of the lock bracket caused by small stress transfer area between the lock shaft and the lock bracket when the lock shaft vibrates is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electric vehicle battery swap, and particularly relates to a power battery pack. BACKGROUND

[0002] In daily life, more and more cars have been used, and the use of a large number of fuel vehicles not only increases the use of some non-renewable resources, but also pollutes the environment by exhaust emission. In the face of the increasingly unbalanced supply and demand of traditional energy and the severe situation of global warming, electric vehicles as a new energy transportation tool have emerged as the times require. Electric vehicles have become one of the emerging industries supported by various countries due to the advantages of low noise, high energy utilization rate, no mobile exhaust emission and the like. With the entry of electric vehicles into the market, the cruising range has become an important influencing factor hindering the development of electric vehicles. By learning from the way that traditional vehicles realize cruising range by refueling, for electric vehicles, charging the battery pack with insufficient power or directly disassembling the battery pack with insufficient power to replace the battery pack with sufficient power has become a key research and development direction for increasing the cruising range of electric vehicles.

[0003] In order to facilitate the disassembly and replacement of the battery pack from the battery swap vehicle, the battery pack is usually provided with a lock shaft, and the bottom of the battery swap vehicle is provided with a lifting piece matched with the lock shaft. The lifting piece fixes the battery pack to the bottom of the battery swap vehicle by lifting the lock shaft. Through the cooperation of the lifting piece and the lock shaft, the convenience of disassembly and assembly of the battery pack is improved, which helps to improve the replacement efficiency of the battery pack and has become the choice of more and more battery swap vehicles. However, there are the following problems: the bumps and impacts received by the vehicle during driving will be transmitted to the lock shaft through the lifting piece, the lock shaft will be relatively displaced with the battery pack due to the impact force transmitted by the vehicle, and with the continuous vibration of the battery swap vehicle, the lock shaft and the battery pack will be frequently impacted, which will easily lead to unstable connection between the lock shaft and the battery pack, and a large amount of noise will be generated, affecting the riding experience of the driver and passengers. CONTENT OF THE UTILITY MODEL

[0004] The 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 and is not stably connected with the vehicle.

[0005] The technical scheme adopted by the application is as follows:

[0006] A power battery pack applied to an electric vehicle, comprising a lock seat and a lock shaft installed on the lock seat, and the power battery pack is hung on the chassis of the electric vehicle through the lock shaft; the lock seat is provided with a mounting hole, the lock shaft has a shaft body penetrating through the mounting hole and a positioning piece located outside the mounting hole; and the application further comprises a protective piece, the protective piece has a protective part located between the positioning piece and the lock seat, the protective part is provided with a penetrating hole matched with the mounting hole, and the protective part is in abutment with the positioning piece and the lock seat respectively.

[0007] The power battery pack of the present application is provided with a lock seat, a lock shaft is arranged on the lock seat, and the lock shaft is hung on the chassis of the electric vehicle, so that the power battery pack can be quickly disassembled and installed from the bottom of the vehicle, which helps to improve the replacement speed of the power battery pack and thus the battery replacement speed of the electric vehicle. The lock seat is provided with a mounting hole, the lock shaft is arranged in the mounting hole to be installed on the lock seat, and a positioning member is arranged outside the mounting hole to prevent the lock shaft from being pulled out of the mounting hole due to the vibration and bumping of the vehicle, thereby helping to ensure the stability of the installation of the power battery pack. On this basis, the power battery pack of the present application is also provided with a protection member having a protection part, the lock shaft is arranged in the mounting hole and the through hole of the protection part in sequence, and the positioning member abuts against the protection part. In this way, when the power battery pack shakes relative to the lock seat due to the bumping of the vehicle body and tends to have a relative displacement between the lock shaft and the lock seat, the positioning member abuts against the protection part, and the impact force of the lock shaft when it shakes will be transmitted to the protection part around the mounting hole and evenly spread to the lock seat through the protection part. The probability of the stress concentration phenomenon of the lock seat due to the small stress transmission area between the lock shaft and the lock seat when the lock shaft shakes is reduced, which provides protection for the service life of the lock seat, thereby helping to improve the connection stability of the power battery pack and the vehicle. Furthermore, since the protection part abuts against the positioning member and the lock seat respectively, the positioning member is limited by the protection part and cannot displace relative to the protection member and the lock seat, so the noise caused by the relative movement of the lock shaft and the protection member or the lock seat is avoided, which helps to improve the riding experience of the driver and passengers.

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

[0009] The protection member further includes a protection sleeve located in the mounting hole, the protection sleeve extends along the length direction of the shaft body and abuts against the inner wall of the mounting hole and the shaft body respectively.

[0010] By arranging the protection sleeve, the shaft body can be wrapped and covered to some extent, the contact area between the shaft body and the lock seat is increased, and when the shaft body receives the vibration and impact transmitted from the vehicle, the shaft body will tend to displace relative to the lock seat. By arranging the protection sleeve and abutting the protection sleeve against the shaft body and the mounting hole respectively, the displacement of the shaft body is limited, the connection stability of the shaft body and the lock seat is improved, and the noise caused by the relative collision between the shaft body and the inner wall of the mounting hole is avoided, which further reduces the transmission of noise from the bottom of the vehicle to the vehicle cabin and thus further improves the riding experience of the driver and passengers.

[0011] The protection sleeve and the protection part are integrally formed, and the protection sleeve and the lock seat are connected 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 part is provided with a limiting seat sleeved on the shaft body and a limiting pin shaft inserted into the limiting hole, so that the limiting seat has a larger contact area with the first positioning part, thereby enabling the limiting seat to provide a more stable abutting force for the first positioning part to keep abutting with the protection part; and the limiting pin shaft and the limiting hole reduce the disassembly and assembly difficulty of the limiting part and the shaft body, so that the limiting part can be easily disassembled and assembled with the shaft body, thereby realizing quick assembly of the lock shaft.

[0019] The lock seat comprises two pairs of bearing plates arranged in position, and an avoiding opening is formed between the two bearing plates above the lock shaft; the two bearing plates are respectively provided with opposite mounting holes; and the protection parts are two in number and are arranged on the two bearing plates.

[0020] The lock shaft is sequentially arranged through the mounting holes on the two bearing plates and is fixed on the two bearing plates, thereby reducing the bearing pressure of a single bearing plate on the lock shaft and reducing the possibility of stress concentration between the lock shaft and the bearing plate, which helps to improve the lifting stability of the power battery pack. In addition, the avoiding opening provides a lifting space for the lifting part at the bottom of the vehicle, and the lifting part can extend into the lock shaft through the avoiding opening and realize lifting cooperation with the lock shaft; and the two protection parts can respectively protect the mounting holes of the two bearing plates and protect the lock shaft and the two bearing plates.

[0021] The bearing plate extends from one end to the other end along the length direction of the power battery pack, and a plurality of mounting holes are arranged on the bearing plate at intervals.

[0022] The number of mounting holes is set to be multiple and arranged at intervals in the extension direction of the bearing plate, and a lock shaft is arranged at each mounting hole; the vehicle can cooperate with multiple lock shafts through multiple lifting parts to realize lifting of the power battery pack. In this way, on the one hand, the lifting force required to be borne by each lock shaft is reduced, thereby reducing the bearing pressure of a single lock shaft; on the other hand, multiple lock shafts are arranged at intervals along the length direction of the power battery pack, thereby realizing uniform distribution of the lifting force of the power battery pack, reducing the probability of tilting of the power battery pack caused by uneven distribution of the lifting force, and helping to improve the lifting stability of the power battery pack.

[0023] The power battery pack comprises a plurality of battery pack accommodating cavities, and two adjacent battery pack accommodating cavities are separated by a partition beam; the partition beam comprises a first roller-pressed body, the first roller-pressed body is integrally roller-pressed, and the bearing plate is part of the first roller-pressed body.

[0024] The power battery pack is provided with a plurality of battery pack accommodating cavities, so that each accommodating cavity can accommodate an independent battery pack, thereby improving the electric capacity of the power battery pack; the battery pack accommodating cavities are separated by a separation beam, thereby improving the independence of each battery pack accommodating cavity; the separation beam comprises a first roller-pressed body formed by integral roller pressing, and the bearing plate is part of the first roller-pressed body, thereby greatly improving the structural strength of the separation beam and the bearing plate, and enhancing the connection stability of the power battery pack and the vehicle.

[0025] The first roller-pressed body further comprises a ring-shaped support structure at the bottom of the bearing plate, and one of the two bearing plates is connected to the ring-shaped support structure through a roller-pressed and bent bottom plate.

[0026] The bottom of the bearing plate is provided with a ring-shaped support structure, which has a cavity inside on the basis of ensuring the structural strength of the separation beam, thereby reducing the self-weight of the separation beam and the load pressure of the vehicle on the power battery pack.

[0027] The power battery pack is separated into a plurality of battery pack accommodating layers by a separation plate extending in the horizontal direction, each battery pack accommodating layer has a plurality of battery pack accommodating cavities; the ring-shaped support structure has a first support portion at the top and a second support portion at the bottom, the first support portion and the second support portion are arranged in a staggered manner to form a boss therebetween, and the separation plate is lapped on the boss.

[0028] The plurality of battery pack accommodating layers provide more battery pack accommodating space for the power battery pack, and the separation plate provides relatively independent accommodating space for the battery pack accommodating cavities of the upper and lower layers. The boss formed between the first support portion and the second support portion of the ring-shaped support structure arranged in a staggered manner provides a mounting position for the separation plate, thereby saving the operation of separately arranging a mounting member for mounting the separation plate, and helping to optimize the structural design of the power battery pack.

[0029] The separation beam further comprises a second roller-pressed body below the first roller-pressed body, and the second roller-pressed body is an integrally roller-pressed structure.

[0030] The second roller-pressed body is integrally formed and also has high structural strength, thereby helping to increase the overall structural strength of the separation beam and the connection stability of the separation beam and the main body of the power battery pack.

[0031] Thanks to the above technical solutions, the application has the following beneficial effects:

[0032] The power battery pack of the application is provided with a lock seat, a lock shaft is arranged on the lock seat, the lock shaft is hung on the chassis of the electric vehicle, so that the battery pack can be quickly disassembled and installed from the bottom of the vehicle, which helps to improve the replacement speed of the battery pack and the battery replacement speed of the electric vehicle. The lock seat is provided with a mounting hole, the lock shaft is arranged in the mounting hole to be mounted on the lock seat, and a positioning member is arranged outside the mounting hole to prevent the lock shaft from being pulled out of the mounting hole due to the vibration and bumping of the vehicle, which helps to ensure the stability of the installation of the battery pack. On this basis, the power battery pack of the application is also provided with a protection member having a protection part, the lock shaft is arranged in the mounting hole and the through hole of the protection part in sequence and the positioning member abuts against the protection part. In this way, when the power battery pack shakes relative to the lock seat due to the bumping of the vehicle body and tends to have a relative displacement between the lock shaft and the lock seat, the positioning member abuts against the protection part, the impact force of the lock shaft when shaking relative to the lock seat is transmitted to the protection part around the mounting hole, and is uniformly diffused to the lock seat through the protection part. The stress concentration phenomenon of the lock seat caused by the small stress transmission area of the lock shaft when shaking is reduced, which provides protection for the service life of the lock seat, thereby helping to improve the connection stability of the power battery pack and the vehicle. Furthermore, since the protection part abuts against the positioning member and the lock seat respectively, the positioning member is limited by the protection part and cannot displace relative to the protection member and the lock seat, so that the noise caused by the relative movement of the lock shaft and the protection member or the lock seat is avoided, which helps to improve the riding experience of the driver and the passengers. BRIEF DESCRIPTION OF DRAWINGS

[0033] The drawings described herein are used to provide further understanding of the application, constitute a part of the application, the illustrative embodiments of the application and the description thereof are used to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0034] Figure 1 It is a structure schematic view of the power battery pack in an embodiment of the application;

[0035] Figure 2 It is a structure schematic view of part of the structure of the power battery pack in an embodiment of the application;

[0036] Figure 3 It is Figure 2 A enlarged view of part A;

[0037] Figure 4 It is a sectional view of the power battery pack in an embodiment of the application;

[0038] Figure 5 It is Figure 4 A enlarged view of part B;

[0039] Figure 6 It is Figure 4 A enlarged view of part C.

[0040] Wherein:

[0041] 1 lock seat, 11 mounting hole, 12 bearing plate;

[0042] 2 lock shaft, 21 shaft body, 211 first end, 212 second end, 22 positioning piece, 221 first positioning piece, 222 second positioning piece, 23 limiting piece, 231 limiting shaft, 232 limiting seat;

[0043] 3 protection piece, 31 protection part, 32 protection sleeve;

[0044] 4 avoidance port;

[0045] 5 battery pack containing cavity;

[0046] 6 first roller body;

[0047] 7 annular support structure, 71 first support part, 72 second support part, 73 boss;

[0048] 8 battery pack containing layer;

[0049] 9 second roller body;

[0050] 10 partition plate. DETAILED DESCRIPTION

[0051] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0052] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment can be combined with each other without conflict.

[0053] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation of the present application.

[0054] In this application, unless specifically defined otherwise, the terms "mounting", "connection", "connecting", "fixed", and the like should be construed broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection, and can also be communication; can be direct connection, or indirect connection through intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0055] In this application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0056] As shown in Figures 1 to 5 A power battery pack applied to an electric vehicle includes a lock seat 1 and a lock shaft 2 mounted on the lock seat 1, and the power battery pack is hung on the chassis of the electric vehicle through the lock shaft 2; the lock seat 1 is provided with a mounting hole 11, the lock shaft 2 has a shaft body 21 penetrating the mounting hole 11 and a positioning member 22 located outside the mounting hole 11; further comprising a protective member 3, the protective member 3 has a protective part 31 located between the positioning member 22 and the lock seat 1, the protective part 31 is provided with a penetrating hole aligned with the mounting hole 11, and the protective part 31 abuts with the positioning member 22 and the lock seat 1 respectively.

[0057] The power battery pack of the present application is provided with a lock seat 1, the lock seat 1 is provided with a lock shaft 2, the lock shaft 2 is hung on the chassis of the electric vehicle, so that the power battery pack can be quickly disassembled and installed from the bottom of the vehicle, which helps to improve the replacement speed of the power battery pack, thereby improving the battery replacement speed of the electric vehicle. The lock seat 1 is provided with a mounting hole 11, the lock shaft 2 is arranged in the mounting hole 11 to be installed on the lock seat 1, and a positioning piece 22 is arranged outside the mounting hole 11, which prevents the lock shaft 2 from being affected by the vibration and bumping of the vehicle and being pulled out of the mounting hole 11, and helps to ensure the installation stability of the power battery pack. On this basis, the power battery pack of the present application is also provided with a protection piece 3 having a protection part 31, the lock shaft 2 is arranged in the mounting hole 11 and the through hole of the protection part 31 in sequence, and the positioning piece 22 abuts against the protection part 31. In this way, when the power battery pack shakes relative to the lock seat 1 due to the bumping of the vehicle body and tends to have a relative displacement between the lock shaft 2 and the lock seat 1, the positioning piece 22 abuts against the protection part 31, and the impact force of the lock shaft 2 when it shakes relative to the lock seat 1 will be transmitted to the protection part 31 around the mounting hole 11 and evenly spread to the lock seat 1 through the protection part 31. The probability of the stress concentration phenomenon of the lock seat 1 caused by the small stress transmission area between the lock shaft 2 and the lock seat 1 when the lock shaft 2 shakes is reduced, which provides protection for the service life of the lock seat 1, thereby helping to improve the connection stability of the power battery pack and the vehicle. Furthermore, since the protection part 31 abuts against the positioning piece 22 and the lock seat 1 respectively, the positioning piece 22 is limited by the protection part 31 and cannot displace relative to the protection piece 3 and the lock seat 1, so the noise caused by the relative movement of the lock shaft 2 and the protection piece 3 or the lock seat 1 is avoided, which helps to improve the riding experience of the driver and the passengers.

[0058] Preferably, the protection part 31 is in a sheet structure, and the projection of the positioning piece 22 towards the lock seat 1 falls on the protection part 31. That is, the projection of the protection part 31 towards the positioning piece 22 covers the positioning piece 22, so that the protection part 31 can realize all-around protection of the positioning piece 22.

[0059] As a preferred embodiment of the present application, as Figure 5As shown, the protective piece 3 further comprises a protective sleeve 32 located in the mounting hole 11, which extends along the length direction of the shaft body 21 and abuts against the inner wall of the mounting hole 11 and the shaft body 21 respectively. By arranging the protective sleeve 32, the shaft body 21 can be wrapped and covered to some extent, thereby increasing the contact area between the shaft body 21 and the lock seat 1. When the shaft body 21 receives the vibration impact transmitted from the vehicle, the shaft body 21 will have a tendency to displace relative to the lock seat 1. By arranging the protective sleeve 32 and abutting the protective sleeve 32 against the shaft body 21 and the mounting hole 11 respectively, the displacement of the shaft body 21 is limited, the connection stability between the shaft body 21 and the lock seat 1 is increased, and the noise caused by the relative collision between the shaft body 21 and the inner wall of the mounting hole 11 is avoided, further reducing the noise transmission from the bottom of the vehicle to the vehicle cab, thereby further improving the riding experience of the driver and passengers.

[0060] As a preferred embodiment of the present embodiment, the protective sleeve 32 is integrally formed with the protective part 31, and the protective sleeve 32 is connected with the lock seat 1 by welding. Arranging the protective sleeve 32 to be integrally formed with the protective part 31 saves the operation of assembling the protective sleeve 32 and the protective part 31, reduces the processing and assembling difficulty of the protective piece 3, and improves the structural strength of the protective piece 3. In addition, arranging the protective sleeve 32 and the lock seat 1 to be connected by welding enhances the connection stability between the protective sleeve 32 and the lock seat 1, integrates the protective piece 3 with the lock seat 1, and increases the connection tightness between the protective piece 3 and the lock seat 1. At the same time, during the assembly of the power battery pack, the operation of connecting and assembling the protective piece 3 and the lock seat 1 is saved, and the assembly rate of the power battery pack is improved.

[0061] In the present embodiment, during the assembly of the power battery pack, the protective piece 3 is first inserted into the mounting hole 11 from one side of the mounting hole 11 until the protective part 31 abuts against the lock seat 1, and then the protective sleeve 32 is welded with the lock seat 1. After the welding of the protective piece 3 is completed, the shaft body 21 is inserted into the protective sleeve 32 until the positioning piece 22 abuts against the protective part 31.

[0062] As a preferred embodiment of the present application, Figure 5As shown, the shaft body 21 has a first end portion 211 and a second end portion 212 located at opposite sides of the shaft body 21, the positioning member 22 includes a first positioning member 221 close to the first end portion 211 and a second positioning member 222 located at the second end portion 212, the first positioning member 221 is detachably connected with the shaft body 21, and the second positioning member 222 is fixedly connected with the shaft body 21. When installing the lock shaft 2, the first end portion 211 of the shaft body 21 is inserted into the mounting hole 11, and then the first positioning member 221 is installed on the shaft body 21, so that the lock shaft 2 is assembled. The first positioning member 221 is detachably connected with the shaft body 21, which facilitates the insertion of the shaft body 21 into the mounting hole 11 and avoids the influence of the first positioning member 221 on the installation process of the shaft body 21. The second positioning member 222 is fixedly connected with the shaft body 21, which can enhance the connection strength of the second positioning member 222 and the shaft body 21 and increase the installation stability of the lock shaft 2.

[0063] As a preferred embodiment of the present embodiment, as shown in Figure 5 The lock shaft 2 further includes a limiting member 23 arranged at the first end portion 211, the limiting member 23 is detachably connected with the shaft body 21, and 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 portion 31, respectively. By arranging the limiting member 23 which is detachably connected with 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 the first positioning member 221 against the protective portion 31, that is, the limiting member 23 functions to lock the position of the first positioning member 221. The limiting member 23 stably positions the first positioning member 221 at a predetermined 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, as shown in Figure 5 The limiting member 23 includes a limiting plug shaft 231 and a limiting seat 232 sleeved on the shaft body 21, the shaft body 21 is provided with a limiting hole, and the limiting plug shaft 231 is inserted into the limiting hole and abuts the limiting seat 232 against the first positioning member 221. By arranging the limiting member 23 including the limiting seat 232 sleeved on the shaft body 21 and the limiting plug shaft 231 inserted into the limiting hole, the limiting seat 232 has a larger contact area with the first positioning member 221, so that the limiting seat 232 can provide a more stable abutting force for the first positioning member 221 to keep abutting against the protective portion 31; and the arrangement of the limiting plug shaft 231 and the limiting hole reduces the disassembly difficulty of the limiting member 23 and the shaft body 21, so that the limiting member 23 can be easily disassembled from the shaft body 21, thereby realizing the rapid assembly of the lock shaft 2.

[0065] Further, the limiting seat 232 is provided with a plurality of avoiding grooves along the circumference thereof, and the limiting insertion shaft 231 passes through the limiting hole through the avoiding grooves. By providing a plurality of avoiding grooves, when installing the limiting seat 232, it is not necessary to accurately position the limiting seat 232, and only one of the plurality of avoiding grooves needs to be aligned with the limiting hole, which helps to reduce the assembly difficulty of the limiting seat 232.

[0066] As a preferred embodiment of the present application, as shown in Figure 3 The lock seat 1 includes two pairs of bearing plates 12 arranged in position, and the two bearing plates 12 form an avoiding opening 4 above the lock shaft 2. The two bearing plates 12 are respectively provided with oppositely arranged mounting holes 11, and the protective member 3 is provided in two numbers and arranged on the two bearing plates 12. The lock shaft 2 passes through the mounting holes 11 on the two bearing plates 12 in sequence and is fixed to the two bearing plates 12, which reduces the bearing pressure of a single bearing plate 12 on the lock shaft 2 and reduces the possibility of stress concentration between the lock shaft 2 and the bearing plate 12, thereby improving the lifting stability of the power battery pack. In addition, the avoiding opening 4 provides a lifting space for the lifting member at the bottom of the vehicle, and the lifting member can extend into the lock shaft 2 through the avoiding opening 4 and realize lifting cooperation with the lock shaft 2. The protective member 3 is provided in two numbers, which can respectively protect the mounting holes 11 of the two bearing plates 12 and play a protective role for the lock shaft 2 and the two bearing plates 12.

[0067] Preferably, the lock seat 1 further includes a connecting plate located at the top of the two bearing plates 12, and the connecting plate is connected to the two bearing plates 12 respectively. The connecting plate is provided with an avoiding opening 4 corresponding to the lock shaft 2.

[0068] As a preferred embodiment of the present embodiment, as shown in Figure 2 , Figure 3 The bearing plate 12 extends from one end to the other end along the length direction of the power battery pack, and a plurality of mounting holes 11 are arranged at intervals on the bearing plate 12. The number of mounting holes 11 is set to be multiple and arranged at intervals in the extension direction of the bearing plate 12, and each mounting hole 11 is provided with a lock shaft 2. The vehicle can cooperate with the plurality of lock shafts 2 through the plurality of lifting members to realize the lifting of the power battery pack. In this way, on the one hand, the lifting force required to be borne by each lock shaft 2 is reduced, thereby reducing the bearing pressure of a single lock shaft 2; on the other hand, the plurality of lock shafts 2 are arranged at intervals along the length direction of the power battery pack, which realizes the uniform distribution of the lifting force of the power battery pack, reduces the probability of the inclination of the power battery pack caused by the uneven distribution of the lifting force, and helps to improve the lifting stability of the power battery pack.

[0069] As a preferred example of the present embodiment, as shown in Figure 2As shown, the power battery pack comprises a plurality of battery pack accommodating cavities 5, and two adjacent battery pack accommodating cavities 5 are separated by a partition beam, and the partition beam comprises a first roll-pressed body 6 which is integrally roll-pressed, and the bearing plate 12 is part of the first roll-pressed body 6. The power battery pack is provided with a plurality of battery pack accommodating cavities 5, so that each accommodating cavity can accommodate an independent battery pack, which helps to improve the capacity of the power battery pack. The battery pack accommodating cavities 5 are separated by the partition beam, which improves the independence of each battery pack accommodating cavity 5. The partition beam comprises a first roll-pressed body 6 which is integrally roll-pressed, and the bearing plate 12 is part of the first roll-pressed body 6, which greatly improves the structural strength of the partition beam and also increases the structural strength of the bearing plate 12, thereby enhancing the connection stability of the power battery pack and the vehicle.

[0070] As a preferred mode of the present example, as shown in Figure 6 As shown, the first roll-pressed body 6 further comprises a ring-shaped support structure 7 at the bottom of the bearing plate 12, and one of the two bearing plates 12 is connected to the ring-shaped support structure 7 by a roll-bent bottom plate. The bearing plate 12 is provided with a ring-shaped support structure 7 at the bottom, and the ring-shaped support structure 7 has a cavity inside to ensure the structural strength of the partition beam, thereby reducing the self-weight of the partition beam and the load pressure of the vehicle on the power battery pack.

[0071] Preferably, as shown in Figure 2 、 Figure 4 、 Figure 6 As shown, the power battery pack is separated into a plurality of battery pack accommodating layers 8 by a partition plate 10 extending in the horizontal direction, and each battery pack accommodating layer 8 has a plurality of battery pack accommodating cavities 5. The ring-shaped support structure 7 has a first support portion 71 located above and a second support portion 72 located below, and the first support portion 71 and the second support portion 72 are arranged in a staggered manner to form a boss 73 therebetween, and the partition plate 10 is lapped on the boss 73. The plurality of battery pack accommodating layers 8 provides more battery pack accommodating space for the power battery pack, and the partition plate 10 provides relatively independent accommodating space for the upper and lower battery pack accommodating cavities 5. The boss 73 formed between the first support portion 71 and the second support portion 72 of the ring-shaped support structure 7 provides a mounting position for the partition plate 10, which eliminates the need for separate mounting members for mounting the partition plate 10, thereby optimizing the structural design of the power battery pack.

[0072] Further, as shown in Figure 6As shown, the partition beam further comprises a second roller body 9 located below the first roller body 6, and the second roller body 9 is integrally roller formed. The second roller body 9 is integrally formed, and also has high structural strength, which helps to increase the overall structural strength of the partition beam and the connection stability of the partition beam and the power battery pack body. Specifically, the power battery pack comprises a base, and the second roller body 9 and the first roller body 6 are connected to the base by welding respectively.

[0073] The places not described in the application can be realized by using or referring to the existing technology.

[0074] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each of the embodiments mainly describes the differences from other embodiments.

[0075] The above only describes the embodiments of the application and is not intended to limit the application. The application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the scope of the claims of the application.

Claims

1. A power battery pack for use in electric vehicles, 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, and the number of protective components is two, each located on one of the two support plates.

8. The power battery pack according to claim 7, characterized in that, 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.

9. The power battery pack according to claim 8, 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 a structure integrally rolled and pressed. The support plate is a part of the first roller pressing body.

10. The power battery pack according to claim 9, characterized in that, 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.

11. The power battery pack according to claim 10, 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.

12. The power battery pack according to any one of claims 9 to 11, 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.

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