Battery box system and vehicle

Abstract

The present invention relates to the field of vehicle battery replacement technology, and in particular, to a battery box system and a vehicle. The bearing assembly of the battery box system includes a base and a locking unit, and the locking unit is detachably connected to the base. The locking unit includes a driving part, a sliding part and a pressing part, the driving part drives the sliding part to slide, the pressing part is rotatably connected to the base, and the sliding part can drive the pressing part to rotate. The battery box system includes a first state and a second state. In the first state, the pressing part is disengaged from the base; in the second state, the base abuts against the base, and the pressing part is pressed on the side of the base away from the base. When vibration occurs during the driving of the vehicle, the impact force generated by the base of the battery box on the pressing part can be transmitted to the sliding part through the pressing part, and then transmitted to the base, so that the base can bear part of the impact force, and the service life of the locking unit can be guaranteed. In this way, the problem that the locking structure of the battery box system is prone to failure is solved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle battery replacement technology, and in particular to a battery box system and a vehicle. Background Art

[0002] The energy of electric vehicles comes from the battery box they carry, and when the battery runs out, the battery box needs to be replaced. Car battery replacement generally requires a battery replacement station to quickly replace the exhausted or insufficient power battery on the electric car with a fully charged battery. In the process of replacing the battery box in a car, the last step is to fix the battery box. Usually, a cylinder is used to push the lock tongue to press the base of the bottom of the battery box onto the bottom bracket of the frame. As the energy source of electric vehicles, the stability of the battery box is directly related to the safety of the vehicle during driving. The lock tongue needs to be able to withstand vibration, impact and acceleration changes under various road conditions to ensure that the battery box will not accidentally fall or loosen.

[0003] During vehicle driving, especially when encountering bumps or braking, acceleration and other working conditions, the lock tongue directly bears most of the impact force, which is easy to cause deformation and wear, thus affecting the locking effect and shortening the service life. More seriously, long-term force may cause the lock tongue to break, causing the battery box to loosen, posing a major threat to driving safety. Therefore, optimizing the lock tongue structure to reduce impact and protect the lock tongue has become a key measure to improve the locking stability of the battery box and the safety of vehicle driving. Summary of the invention

[0004] In order to solve the problem that the locking structure of a battery box system is prone to failure, the present invention provides a battery box system and a vehicle.

[0005] In a first aspect, the present invention provides a battery box system, the battery box system comprising:

[0006] The battery box system includes a battery box assembly and a bearing assembly, wherein the battery box assembly includes a box body and a base, wherein the base is detachably connected to the box body; the bearing assembly includes a bottom bracket and a locking unit, wherein the locking unit is detachably connected to the bottom bracket;

[0007] The locking unit comprises a driving part, a sliding part and a pressing part, wherein the driving part is detachably connected to the base, the sliding part is slidably connected to the base, the driving part drives the sliding part to slide, the pressing part is rotatably connected to the base, the sliding part slides toward the pressing part to drive the pressing part to rotate, and the sliding part has a first contact surface;

[0008] The battery box system includes a first state and a second state. In the first state, the pressing portion is separated from the base; in the second state, the base bracket is in contact with the base, the pressing portion is pressed on a side of the base away from the base bracket, and the first contact surface is pressed on a side of the pressing portion away from the base; the surface of the base bracket in contact with the base is a bearing surface, and a first angle is formed between the first contact surface and the bearing surface;

[0009] The sliding direction of the sliding portion has a second angle with the bearing surface; the angle between the first contact surface and the sliding direction of the sliding portion is the sum of the first angle and the second angle.

[0010] In some embodiments, the base has a pressure-bearing surface, and the pressing portion has a pressure surface on the side facing away from the sliding portion. In the second state, the pressure-bearing surface is located on the side of the base facing away from the base support, the normal of the pressure-bearing surface is inclined toward the pressing portion, and the pressing surface is in contact with the pressure-bearing surface.

[0011] In some embodiments, the pressure-bearing surface is parallel to the first contact surface.

[0012] In some embodiments, the first angle is 5°~8°, the second angle is 5°~8°, the base is detachably connected to a guide portion, the sliding portion is slidably connected to the guide portion, and the surface roughness of the sliding portion in contact with the guide portion is 0.1Ra~0.15Ra.

[0013] In some embodiments, when the base is installed on the vehicle, the vertical projection of the locking unit is located within the vertical projection of the base.

[0014] In some embodiments, the hardness of the sliding portion is less than or equal to the hardness of the pressing portion.

[0015] In some embodiments, the clamping portion has a second contact surface, and in the second state the second contact surface is in contact with the first contact surface. A positioning shaft is rotatably connected between the clamping portion and the base, and the end of the second contact surface away from the positioning shaft is the terminal end, and the first contact surface moves within the range between the positioning shaft and the terminal end.

[0016] In some embodiments, the clamping portion includes a rotating rod and a clamping block, one end of the rotating rod is rotatably connected to the base via the positioning axis, the second contact surface is located on the rotating rod, the other end of the rotating rod is rotatably connected to the clamping block via a connecting axis, the distance between the positioning axis and the connecting axis is a first distance, the distance between the end of the clamping block away from the connecting axis and the connecting axis is a second distance, the first distance is greater than the second distance, and in the second state, the sliding portion is pressed against the rotating rod, and the end of the clamping block away from the connecting axis is pressed against the base.

[0017] In some embodiments, the sliding part is detachably connected to a linkage part, the linkage part includes a connecting piece and a limiting protrusion, the connecting piece is fixedly or detachably connected to the limiting protrusion, the connecting piece is detachably connected to the sliding part, the clamping part is provided with an accommodating space for the limiting protrusion to move, and the clamping part is detachably connected to a limiting part for limiting the limiting protrusion from leaving the accommodating space.

[0018] In a second aspect, the present invention provides a vehicle, the vehicle comprising any battery box system in the first aspect, the vehicle further comprising:

[0019] The vehicle body assembly comprises a vehicle front, a vehicle frame and a driving unit, wherein the vehicle front is detachably connected to the vehicle frame, the driving unit drives the vehicle front and the vehicle frame to travel, the base is detachably connected to the vehicle frame, and the battery box assembly is locked on the vehicle frame through the load-bearing assembly.

[0020] In order to solve the problem that the locking structure of the battery box system is prone to failure, the present invention has the following advantages:

[0021] By setting the lock tongue as a combined structure of a sliding part and a pressing part, the sliding part can slide and the pressing part can rotate. When vibration occurs during the driving process of the vehicle, the impact force generated by the base of the battery box on the pressing part can be transmitted to the sliding part through the pressing part, and then transmitted to the structure of the bottom bracket, so that the bottom bracket can bear part of the impact force, which can ensure the service life of the locking unit. Since the sliding direction of the sliding part is inclined, the first contact surface of the sliding part in contact with the pressing part is also an inclined surface, and the sliding friction between the sliding part and the bottom bracket can be used to achieve self-locking while also facilitating the unlocking of the sliding block with the help of the impact force generated by the vibration. At the same time, since the first angle and the second angle are both conducive to the unlocking of the sliding part, the first angle can be set to a smaller angle, which can ensure that the component force of the pressing force of the locking unit on the base in the vertical direction is larger, thereby ensuring the pressing effect on the base and improving the stability of the battery box assembly after fixing. The present invention greatly improves the service life of the bearing assembly by improving the reliability during locking and the convenience of unlocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a battery box assembly according to an embodiment is shown;

[0023] Figure 2 A schematic diagram of a load-bearing assembly of a battery box system according to an embodiment is shown;

[0024] Figure 3 A cross-sectional schematic diagram of a locking unit in a retracted state according to an embodiment is shown;

[0025] Figure 4 A schematic cross-sectional view of a locking unit in a compressed state according to an embodiment is shown;

[0026] Figure 5 A schematic diagram of the transmission structure of a battery box system according to an embodiment is shown;

[0027] Figure 6 A schematic diagram of a pressing portion of a battery box system according to an embodiment is shown;

[0028] Figure 7 A schematic diagram of a battery box system and a vehicle according to an embodiment is shown.

[0029] Figure numerals: 10 battery box assembly; 11 box body; 12 base; 13 pressure-bearing surface; 14 pressure-bearing block; 20 bearing assembly; 21 bottom bracket; 22 locking unit; 221 driving part; 222 sliding part; 223 pressing part; 2231 rotating rod; 2232 pressing block; 2233 connecting shaft; 224 first contact surface; 225 second contact surface; 226 positioning shaft; 227 linkage part; 2271 connecting piece; 2272 limiting protrusion; 228 accommodating space; 229 limiting part; 23 bearing surface; 24 guiding part; 30 vehicle body assembly; 31 vehicle head; 32 vehicle frame; 33 driving unit. DETAILED DESCRIPTION

[0030] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0031] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0032] As the energy source of electric vehicles, the stability of the battery box is directly related to the safety of the vehicle during driving. In the process of replacing the battery box of a car, a cylinder is usually used to push the lock tongue to press the base 12 at the bottom of the battery box onto the base 21 of the frame 32. Therefore, the lock tongue needs to be able to withstand vibrations, impacts and acceleration changes under various road conditions to ensure that the battery box will not accidentally fall or loosen. During vehicle driving, especially when encountering bumps or braking, acceleration and other working conditions, the lock tongue directly bears most of the impact force, which is easy to cause deformation and wear, thereby affecting the locking effect and shortening the service life. Therefore, optimizing the lock tongue structure to reduce impact is the key to improving the locking stability of the battery box and the safety of vehicle driving.

[0033] This embodiment discloses a battery box system, such as Figure 1As shown, the battery box assembly 10 and the carrier assembly 20 may be included. The carrier assembly 20 may be located below the battery box assembly 10 and fix the battery box assembly 10. The battery box assembly 10 may include a box body 11 and a base 12. The base 12 may be detachably connected to the box body 11. The carrier assembly 20 may include a base 21 and a locking unit 22. The locking unit 22 may be detachably connected to the base 21. The locking unit 22 may be provided in multiple groups, such as Figure 2 As shown, four groups of locking units 22 may be symmetrically arranged in pairs on the two longer sides of the base 12, and two groups of locking units 22 may be symmetrically arranged in pairs on the two shorter sides of the base 12.

[0034] like Figure 3 As shown, the locking unit 22 may include a driving portion 221, a sliding portion 222 and a pressing portion 223. The driving portion 221 may be detachably connected to the base 21, the sliding portion 222 may be slidably connected to the base 21, and the driving portion 221 may be a cylinder, one end of which may be detachably connected to the sliding portion 222 and drive the sliding portion 222 to move. One end of the pressing portion 223 may be rotatably connected to the base 21, and the sliding portion 222 may slide toward the pressing portion 223 to drive the pressing portion 223 to rotate. When the sliding portion 222 slides away from the pressing portion 223, the pressing portion 223 may be driven to reset by providing a torsion spring, or a connecting structure may be provided between the sliding portion 222 and the pressing portion 223, so that the sliding portion 222 may drive the pressing portion 223 to rotate when sliding back and forth.

[0035] The battery box system may include a first state and a second state. Figure 3 As shown, in the first state, the driving portion 221 can drive the sliding portion 222 to retract toward the driving portion 221, and the pressing portion 223 rotates with the movement of the sliding portion 222 to be separated from the base 12; Figure 4 As shown, in the second state, the driving part 221 can drive the sliding part 222 to extend away from the driving part 221, the base 21 abuts against the base 12, and the pressing part 223 rotates with the sliding part 222 to be pressed against the side of the base 12 away from the base 12, and the sliding part 222 is pressed against the side of the pressing part 223 away from the base 12. At this time, the battery box base 12 is clamped to the locking unit 22. Among them, the surface where the sliding part 222 and the pressing part 223 abut is the first contact surface 224. In addition, when vibration occurs during the driving of the vehicle, the impact force generated by the base 12 on the pressing part 223 can be transmitted to the sliding part 222 through the pressing part 223. Then, it is transmitted to the structure of the base 21 through the sliding part 222, so that the base 21 bears most of the impact force, which can ensure the service life of the locking unit 22.

[0036] The surface of the bottom bracket 21 in contact with the base 12 in the second state may be a bearing surface 23. Figure 4 and Figure 5 As shown, in the second state, there is a first angle a1 between the first contact surface 224 and the bearing surface 23, and there is a second angle a2 between the sliding direction of the sliding part 222 and the bearing surface 23. The angle between the first contact surface 224 and the sliding direction of the sliding part 222 is the sum of the first angle and the second angle. The larger the angle between the first contact surface 224 and the sliding direction of the sliding part 222, the greater the component force of the impact force generated by the vibration along the direction of the sliding part 222 will be, which is conducive to unlocking the sliding block. The sum of the first angle and the second angle is controlled within a specified range, so that it can be ensured that the component force of the impact force generated by the vibration along the direction perpendicular to the sliding direction of the sliding part 222 is large, thereby ensuring that the friction force of the sliding part 222 when sliding on the bottom bracket 21 is large, and the friction between the sliding part 222 and the plane on the bottom bracket 21 that slides in contact is used to achieve self-locking.

[0037] In addition, decomposing the angle between the first resistance surface 224 and the sliding direction of the sliding part 222 into a first angle and a second angle can increase the component of the clamping force applied by the driving part 221 in the vertical direction, thereby ensuring the clamping effect of the locking unit 22 on the base 12 and improving the stability of the fixation of the battery box assembly 10.

[0038] In this embodiment, if Figure 4 As shown, the base 12 may have a pressure-bearing surface 13, and the force of the clamping part 223 used to fix the battery box acts on the pressure-bearing surface 13, and the pressure-bearing surface 13 may be made of high-strength material to reduce wear. The side of the clamping part 223 away from the sliding part 222 has a clamping surface. In the second state, the pressure-bearing surface 13 may be located on the side of the base 12 away from the bottom bracket 21, and the clamping part 223 may rotate under the drive of the sliding part 222 so that the clamping surface and the pressure-bearing surface 13 abut and fit. In addition, the normal of the pressure-bearing surface 13 may be inclined toward the clamping part 223. When the car is bumpy or braked suddenly, most of the vibration impact force can be transmitted from the clamping part 223 to the sliding part 222 and then to the bottom bracket 21, thereby improving the reliability of the overall mechanism and reducing the degree of impact force borne by the clamping part 223, thereby improving the service life of the locking unit 22.

[0039] In this embodiment, if Figure 5 As shown, the pressure-bearing surface 13 can be parallel to the first contact surface 224. Therefore, the impact force generated by the vibration can be completely transmitted to the sliding part 222 through the pressing part 223, thereby increasing the service life of the pressing part 223 as much as possible.

[0040] In this embodiment, if Figure 4As shown, this embodiment is a preferred embodiment. In order to take into account the self-locking and easy unlocking effects of the locking unit 22, as well as the pressing effect of the locking unit 22 on the base 12, the first angle a1 can be 5°~8°, and the second angle can be 5°~8°. In order to facilitate the sliding of the sliding part 222, a guide part 24 is detachably connected to the bottom bracket 21, and the guide part 24 is used to guide the sliding direction of the sliding part 222, thereby improving the stability of the sliding process of the sliding part 222. In order to achieve the above-mentioned self-locking and easy unlocking purposes, the surface roughness of the sliding part 222 in contact with the guide part 24 is 0.1Ra~0.15Ra, and the guide part 24 can be set to a relatively smooth state.

[0041] Fixing the locking unit 22 inside the base 21 can save space outside the base 21 on the vehicle.

[0042] If the hardness of the sliding part 222 is relatively large, on the one hand, when the locking action is performed, the sliding part 222 will squeeze the pressing part 223 and cause the pressing part 223 to be concave, and the concave will cause resistance to the sliding of the sliding part 222 when it is locked. On the other hand, after the sliding part 222 is locked, if the tail end of the sliding part 222 close to the driving part 221 is located in the surface area of ​​the pressing part 223, when unlocking is required, the concave on the pressing part 223 will form an obstacle in the sliding direction of the sliding part 222 when it is unlocked, thereby being not conducive to unlocking. As a preferred embodiment, this embodiment sets the hardness of the sliding part 222 to be less than or equal to the hardness of the pressing part 223, and finally achieves the purpose of easy locking and unlocking.

[0043] In this embodiment, if Figure 5 As shown, the pressing part 223 may have a second contact surface 225, which is the side of the pressing part 223 that contacts the first contact surface 224 in the second state. A positioning shaft 226 is rotatably connected between the pressing part 223 and the base 21, and the end of the second contact surface 225 away from the positioning shaft 226 is the terminal end, and the first contact surface 224 moves within the range between the positioning shaft 226 and the terminal end.

[0044] If the sliding distance of the first contact surface 224 is not restricted, the first contact surface 224 can easily slide beyond the second contact surface 225 during the locking action, so that the portion of the first contact surface 224 that exceeds the second contact surface 225 is not squeezed and deformed. When the hardness of the sliding portion 222 is lower than that of the clamping portion 223, the portion of the second contact surface 225 that is squeezed against the first contact surface 224 will be deformed and concave, which is not conducive to the sliding of the sliding portion 222 during unlocking, and is further not conducive to unlocking.

[0045] Therefore, limiting the sliding range of the first contact surface 224 can reduce the volume of the sliding portion 222 and simplify the structure on the one hand, and facilitate unlocking on the other hand.

[0046] In this embodiment, if Figure 5 and 6 As shown, the pressing part 223 may include a rotating rod 2231 and a pressing block 2232. One end of the rotating rod 2231 may be rotatably connected to the base 21 through a positioning shaft 226. The second contact surface 225 is located on the rotating rod 2231. The other end of the rotating rod 2231 may be rotatably connected to the pressing block 2232 through a connecting shaft 2233. The pressing block 2232 is U-shaped, with an arc-shaped upper end rotatably connected to the rotating rod 2231 through a connecting shaft 2233, and a flat lower end that abuts against the pressure block 14 to press the battery box assembly 10. The rotational connection between the pressing block 2232 and the rotating rod 2231 can abut against the pressure surface 13 more flexibly and stably, thereby making the fixation of the base 12 more stable. The distance between the positioning shaft 226 and the connecting shaft 2233 can be a first distance, and the distance between the end of the pressing block 2232 away from the connecting shaft 2233 and the connecting shaft 2233 can be a second distance. The first distance is greater than the second distance, which can make the pressure transmission efficiency higher and the pressing of the pressure block 14 more stable. In the second state, the sliding part 222 is pressed against the rotating rod 2231, and the end of the pressing block 2232 away from the connecting shaft 2233 is pressed against the base 12. In the locking process, the pressing block 2232 is in a free rotation state, so that when the pressing block 2232 is gradually pressed against the pressure block 14, the pressing block 2232 can adjust the angle adaptively to ensure that the pressing block 2232 and the pressure block 14 are in a surface-to-surface contact state, thereby ensuring the contact area between the pressing part 223 and the base 12, and improving the reliability of the overall structure after locking.

[0047] In this embodiment, if Figure 5 and Figure 6 As shown, the sliding part 222 is detachably connected with a linkage part 227, and the linkage part 227 may include a connecting member 2271 and a limiting protrusion 2272. One end of the connecting member 2271 may be detachably connected to the sliding part 222, and the end of the connecting member 2271 away from the sliding part 222 may be fixedly or detachably connected to the limiting protrusion 2272, wherein the fixed connection is more stable, and the detachable connection is convenient for disassembly. The pressing part 223 is provided with an accommodating space 228 for the limiting protrusion 2272 to move, and the pressing part 223 is detachably connected with a limiting part 229 that limits the limiting protrusion 2272 from being separated from the accommodating space 228. When the sliding part 222 slides back and forth, the pressing part 223 may rotate with the sliding part 222 through the linkage part 227.

[0048] In another embodiment, the linkage part 227 can be omitted, and a torsion spring is provided on the base 21 to drive the clamping part 223 to rotate in one direction, and the torsion spring drives the clamping part 223 to rotate toward the sliding part 222. The specific working principle is that in the process of locking the battery box assembly 10, the sliding part 222 slides toward the clamping part 223, and then pushes the clamping part 223 to overcome the elastic force of the torsion spring to rotate, and finally achieves the clamping of the base 12. In the process of unlocking the battery box assembly 10, the driving part 221 drives the sliding part 222 to slide away from the clamping part 223, thereby releasing the driving force of the sliding part 222 on the clamping part 223. At this time, under the action of the torsion spring, the clamping part 223 rotates toward the sliding part 222 to release the lock of the base 12.

[0049] In this embodiment, a vehicle is provided, which includes any battery box system of the above embodiments, such as Figure 7 As shown, the vehicle may also include:

[0050] The vehicle body assembly 30 may include a vehicle front 31, a vehicle frame 32 and a drive unit 33. The vehicle front 31 is detachably connected to the vehicle frame 32. The drive unit 33 can drive the vehicle front 31 and the vehicle frame 32 to travel. The base 21 is detachably connected to the vehicle frame 32. The battery box assembly 10 can be locked on the vehicle frame 32 through the load-bearing assembly 20.

[0051] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A battery box system, characterized in that: The battery box system includes a battery box assembly and a bearing assembly, wherein the battery box assembly includes a box body and a base, wherein the base is detachably connected to the box body; the bearing assembly includes a bottom bracket and a locking unit, wherein the locking unit is detachably connected to the bottom bracket; The locking unit comprises a driving part, a sliding part and a pressing part, wherein the driving part is detachably connected to the base, the sliding part is slidably connected to the base, the driving part drives the sliding part to slide, the pressing part is rotatably connected to the base, the sliding part slides toward the pressing part to drive the pressing part to rotate, and the sliding part has a first contact surface; The battery box system includes a first state and a second state. In the first state, the pressing portion is separated from the base; in the second state, the base bracket is in contact with the base, the pressing portion is pressed on a side of the base away from the base bracket, and the first contact surface is pressed on a side of the pressing portion away from the base; the surface of the base bracket in contact with the base is a bearing surface, and a first angle is formed between the first contact surface and the bearing surface; The sliding direction of the sliding portion and the bearing surface have a second angle; the angle between the first contact surface and the sliding direction of the sliding portion is the sum of the first angle and the second angle; The first angle is 5° to 8°, and the second angle is 5° to 8°; The pressing part has a second contact surface, and in the second state, the second contact surface is in contact with the first contact surface. A positioning shaft is rotatably connected between the pressing part and the base, and the end of the second contact surface away from the positioning shaft is a terminal end, and the first contact surface moves within a range between the positioning shaft and the terminal end; The pressing part comprises a rotating rod and a pressing block. One end of the rotating rod is rotatably connected to the base through the positioning shaft. The second contact surface is located on the rotating rod.

2. A battery box system according to claim 1, characterized in that: The base has a pressure-bearing surface, and the clamping portion has a pressure surface on a side away from the sliding portion. In the second state, the pressure-bearing surface is located on a side of the base away from the base support, the normal of the pressure-bearing surface is inclined toward the clamping portion, and the clamping surface is in contact with the pressure-bearing surface.

3. A battery box system according to claim 2, characterized in that: The pressure-bearing surface is parallel to the first contact surface.

4. A battery box system according to claim 1, characterized in that: The base is detachably connected with a guide portion, the sliding portion is slidably connected to the guide portion, and the surface roughness of the sliding portion in contact with the guide portion is 0.1Ra-0.15Ra.

5. A battery box system according to claim 1, characterized in that: When the base is mounted on the vehicle, a vertical projection of the locking unit is located within a vertical projection of the base.

6. A battery box system according to claim 1, characterized in that: The hardness of the sliding portion is less than or equal to the hardness of the pressing portion.

7. A battery box system according to claim 1, characterized in that: A connecting shaft is rotatably connected between the other end of the rotating rod and the clamping block, the distance between the positioning shaft and the connecting shaft is a first distance, the distance between the end of the clamping block away from the connecting shaft and the connecting shaft is a second distance, the first distance is greater than the second distance, and in the second state, the sliding portion is pressed against the rotating rod, and the end of the clamping block away from the connecting shaft is pressed against the base.

8. A battery box system according to claim 1, characterized in that: The sliding part is detachably connected to a linkage part, and the linkage part includes a connecting piece and a limiting protrusion. The connecting piece is fixedly or detachably connected to the limiting protrusion, and the connecting piece is detachably connected to the sliding part. An accommodating space for the movement of the limiting protrusion is provided inside the clamping part, and a limiting part that limits the limiting protrusion from leaving the accommodating space is detachably connected to the clamping part.

9. A vehicle, characterized in that: The vehicle comprises the battery box system and body assembly according to any one of claims 1 to 8, the body assembly comprises a front, a frame and a drive unit, the front is detachably connected to the frame, the drive unit drives the front and the frame to travel, the base is detachably connected to the frame, and the battery box assembly is locked to the frame via the load-bearing assembly.

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