Battery box locking device and battery box system

Abstract

The present invention relates to the field of vehicle battery boxes, and in particular, to a battery box locking device and a battery box system. The battery box locking device includes a bottom bracket and a locking assembly, the locking assembly includes a sliding drive unit, a transmission unit, a fixed frame and a clamping unit, and the first sliding guide module provided on the fixed frame includes a first guide section and a second guide section connected to each other. The sliding drive unit can drive the transmission unit to slide. The clamping unit is rotatably connected to the fixed frame via a rotating shaft, a second sliding guide module is provided on the clamping unit, and the transmission unit is slidably connected to the clamping unit via the second sliding guide module. The battery box system includes a battery box locking device and a battery box assembly, the battery box assembly includes a battery box body and a base, and the base is clamped between the clamping unit in the battery box locking device and the bottom bracket. In this way, the problem of poor locking effect of the battery box is solved.

Description

Technical Field

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

[0002] As electric vehicles become increasingly popular, battery swap stations play an indispensable role as the main facilities to ensure their endurance. Battery swap stations can directly replace the battery box of a car to replenish energy for the car as quickly as possible. In this process, the lock tongue on the bottom bracket is the key structure connecting the battery box and the electric car. The lock tongue achieves precise docking with the base of the battery box through a precise mechanical structure, and uses the force generated by components such as springs to press the battery box. This design not only enhances the connection strength between the battery box and the electric car, but also ensures the stability and safety of the battery box during driving.

[0003] However, as electric vehicles are used for a long time and inevitably vibrate and bump during driving, the locking tongue's pressing force on the battery box gradually weakens, which can cause safety hazards such as the battery box falling off. In order to meet this challenge, the design of the locking tongue must fully consider its durability and adaptability to ensure that it can maintain stable performance under various complex road conditions, such as vibration, impact, and acceleration changes, and effectively prevent the battery box from accidentally falling off or loosening during driving. Summary of the invention

[0004] In order to solve the problem of poor locking effect of a battery box, the present invention provides a battery box locking device and a battery box system.

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

[0006] The battery box locking device comprises a bottom bracket and a locking assembly, and the locking assembly comprises a sliding drive unit, a transmission unit, a fixing frame and a pressing unit;

[0007] The sliding drive unit is rotatably connected to the bottom bracket, and the transmission unit is detachably connected to the sliding drive unit; the fixed frame is detachably connected to the bottom bracket, and a first sliding guide module is arranged on the fixed frame, the first sliding guide module includes a first guide section and a second guide section, the first guide section and the second guide section are connected, the transmission unit is slidably connected to the fixed frame through the first sliding guide module, and the sliding drive unit drives the transmission unit to slide;

[0008] A rotating shaft is detachably connected between the clamping unit and the fixing frame, and the clamping unit is rotatably connected to the fixing frame via the rotating shaft; the first guide section is in an arc shape with the rotating shaft as the center, and the distance from the second guide section to the rotating shaft gradually increases in a direction away from the first guide section;

[0009] The clamping unit is provided with a second sliding guide module, the second sliding guide module is arranged in a straight line, the distance from the rotating shaft to the second sliding guide module gradually changes along the length direction of the second sliding guide module, and the transmission unit is slidably connected to the clamping unit through the second sliding guide module;

[0010] In the projection of the locking assembly on the reference section, when the transmission unit is located at the connection position between the first guide section and the second guide section, the second guide section extends along the direction of the second sliding guide module away from the first guide section, and the reference section is perpendicular to the rotating axis.

[0011] In some embodiments, the clamping unit includes a locking tongue and a rotating block, the locking tongue is fixedly connected to the rotating block, one end of the rotating block is rotatably connected to the bottom bracket through the rotating shaft, and the second sliding guide module is a sliding groove and is provided on the rotating block;

[0012] The bottom bracket has a supporting surface, and when the bottom bracket is fixed on the vehicle, the supporting surface is arranged upward; the second guide section is located on a side of the first guide section close to the locking tongue, and when the transmission unit moves from the first guide section toward the second guide section, the locking tongue rotates toward the supporting surface.

[0013] In some embodiments, an extension line of the second sliding guide module intersects the axis of the rotating shaft at right angles.

[0014] In some embodiments, the second guide segment is arranged in a straight line.

[0015] In some embodiments, the first sliding guide module further includes a transition guide segment, wherein the transition guide segment is connected between the first guide segment and the second guide segment, the transition guide segment is tangent to the first guide segment, and the transition guide segment is tangent to the second guide segment.

[0016] In some embodiments, in the projection of the locking assembly on the reference section, when the transmission unit is located at the end of the second guide segment away from the first guide segment, the angle between the length direction of the second sliding guide module and the length direction of the second guide segment is 0°~8°.

[0017] In some embodiments, the second guide segment is arc-shaped, the arc concave direction of the second guide segment is opposite to the arc concave direction of the first guide segment, and the arc radius of the second guide segment is larger than the arc radius of the first guide segment; when the transmission unit is located at the end of the second guide segment away from the first guide segment, the angle between the tangent of the second guide segment passing through the position of the transmission unit and the second sliding guide module is 0°~8°.

[0018] In some embodiments, the first sliding guide module also includes a third guide segment, the second guide segment is located between the first guide segment and the third guide segment, the third guide segment is connected to the second guide segment, and during the sliding of the transmission unit along the third guide segment, the third guide segment is parallel to the second sliding guide module, and the distance from the rotating shaft to the third guide segment gradually increases in the direction away from the second guide segment.

[0019] In some embodiments, the locking components are provided in multiple groups, and the multiple groups of locking components are distributed around the bottom bracket.

[0020] In a second aspect, the present invention provides a battery box system, the battery box system comprising any one of the battery box locking devices in the first aspect, the battery box system comprising:

[0021] A battery box assembly, the battery box assembly includes a battery box body and a base, the base is detachably connected to the battery box body, and when the battery box assembly is locked on the vehicle by the battery box locking device, the base is pressed between the pressing unit in the battery box locking device and the bottom bracket.

[0022] In order to solve the problem of poor locking effect of the battery box, the present invention has the following advantages:

[0023] 1. The design of the first sliding guide module on the locking assembly divides the locking steps of the battery box into two stages. In the first stage, the rapid swing of the transmission unit in the first guide section accelerates the overall locking speed. In the second stage, during the sliding process of the transmission unit in the second guide section, the force arm that drives the clamping unit to rotate gradually becomes longer, thereby slowing down the rotation amplitude of the clamping unit and increasing the degree of clamping of the clamping part on the battery box base.

[0024] 2. After the transmission unit slides to the second guide section, the angle between the telescopic direction of the sliding drive unit and the second sliding guide module is reduced, so that when the transmission unit is subjected to the vibration force of the clamping unit, the component of the vibration force along the telescopic direction of the sliding drive unit is smaller, so that the transmission unit is not easily disturbed by the vibration and produces an unlocking tendency, thereby improving the stability of the clamping unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a battery box locking assembly according to a first embodiment is shown;

[0026] Figure 2 A schematic cross-sectional view of a battery box locking assembly according to a first embodiment is shown;

[0027] Figure 3 A schematic diagram of a sliding drive unit and a pressing unit of the first embodiment is shown;

[0028] Figure 4 A schematic diagram of a battery box locking assembly according to a second embodiment is shown;

[0029] Figure 5 A schematic diagram of a first sliding guide module of a third embodiment is shown;

[0030] Figure 6 A schematic diagram of a battery box locking device according to a first embodiment is shown;

[0031] Figure 7 A schematic diagram of a battery box system of the first embodiment is shown.

[0032] Figure numerals: 10 bottom bracket; 20 locking assembly; 21 sliding drive unit; 22 transmission unit; 23 fixing frame; 24 clamping unit; 241 locking tongue; 242 rotating block; 25 first sliding guide module; 251 first guide section; 252 second guide section; 253 transition guide section; 254 third guide section; 26 rotating shaft; 27 second sliding guide module; 30 supporting surface; 40 battery box body; 50 base. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] During battery replacement in an electric vehicle, the locking mechanism is used to firmly connect the battery box to the vehicle body, wherein the locking tongue 241 structure is the key to this mechanism, which achieves the locking effect by tightly pressing the battery box base 50. However, with the vibration and bumps during the driving of the vehicle, the battery box base 50 will continuously exert force on the locking tongue 241, which may cause the pressing mechanism of the locking tongue 241 to deform, weakening its original pressing efficiency, and ultimately endangering the driving safety of the vehicle.

[0036] This embodiment discloses a battery box locking device, such as Figure 6 As shown, it may include:

[0037] The bottom bracket 10 and the locking assembly 20. The bottom bracket 10 can be adapted to the shape of the bottom surface of the battery box to support and fix the position of the battery box on the vehicle. Figure 1As shown, the locking assembly 20 may include a sliding drive unit 21 , a transmission unit 22 , a fixing frame 23 and a pressing unit 24 .

[0038] like Figure 1 As shown, the sliding drive unit 21 can be a cylinder, and the end of the sliding drive unit 21 away from the piston rod can be rotatably connected to the bottom bracket 10, and the piston rod of the sliding drive unit 21 can be detachably connected to the transmission unit 22. The fixed frame 23 can be detachably connected to the bottom bracket 10, and the end of the fixed frame 23 that cooperates with the battery box can play a guiding role. The end of the fixed frame 23 away from the bottom bracket 10 has a wedge surface, so that in the process of placing the battery box on the bottom bracket 10, the wedge surface can play a guiding role so that the battery box is accurately positioned on the bottom bracket 10. A first sliding guide module 25 can be provided on the fixed frame 23, and the first sliding guide module 25 is in the shape of a strip hole. The first sliding guide module 25 may include a first guide section 251 and a second guide section 252, and the first guide section 251 and the second guide section 252 are connected together. The transmission unit 22 can be slidably connected to the fixed frame 23 through the first sliding guide module 25, and the sliding drive unit 21 drives the transmission unit 22 to slide.

[0039] A rotating shaft 26 is detachably connected between the pressing unit 24 and the fixing frame 23, and the pressing unit 24 can be rotatably connected to the fixing frame 23 via the rotating shaft 26. The first guide section 251 can be in an arc shape with the rotating shaft 26 as the center, and the distance from the second guide section 252 to the rotating shaft 26 gradually increases in the direction away from the first guide section 251. Therefore, when the transmission unit 22 slides along the first guide section 251, the rotation speed of the transmission unit 22 around the rotating shaft 26 is relatively fast. When the transmission unit 22 slides along the second guide section 252, the rotation angle of the transmission unit 22 relative to the rotating shaft 26 changes relatively slowly.

[0040] The clamping unit 24 may be provided with a second sliding guide module 27, which may be arranged in a straight line, and the distance from the rotating shaft 26 to the second sliding guide module 27 gradually changes along the length direction of the second sliding guide module 27. The transmission unit 22 is slidably connected to the clamping unit 24 through the second sliding guide module 27. After the base 50 of the battery box abuts against the bottom bracket 10, the transmission unit 22 drives the clamping unit 24 to rotate toward the base 50 of the battery box during the movement from the first guide section 251 toward the second guide section 252. Under the guidance of the first guide section 251, the transmission unit 22 drives the clamping unit 24 to rotate rapidly toward the bottom bracket 10, and the base 50 of the battery box can be initially and rapidly clamped.

[0041] After the initial compression, the transmission unit 22 can continue to slide under the guidance of the second guide segment 252 and the second sliding guide module 27. The plane perpendicular to the rotation axis 26 is the reference section. Since the distance from the second guide segment 252 to the rotation axis 26 gradually increases in the direction away from the first guide segment 251, and in the projection of the locking assembly 20 on the reference section, when the transmission unit 22 is located at the connection position of the first guide segment 251 and the second guide segment 252, the second guide segment 252 extends along the direction of the second sliding guide module 27 away from the first guide segment 251.

[0042] Thus, during the sliding process of the transmission unit 22 along the second guide section 252, the transmission unit 22 continues to drive the clamping unit 24 to rotate. While the transmission unit 22 drives the clamping unit 24 to rotate, the transmission unit 22 also slides along the second sliding guide module 27 relative to the clamping unit 24, thereby slowing down the rotation speed of the clamping unit 24. However, the distance between the transmission unit 22 and the rotating shaft 26 increases, that is, the force arm of the transmission unit 22 driving the clamping unit 24 to rotate gradually lengthens, thereby achieving the effect of slowing down the rotation amplitude of the driving clamping unit 24 and improving the degree of clamping of the clamping unit 24 on the battery box base 50. At the same time, as the clamping unit 24 slides in the first sliding guide module 25, the angle between the telescopic direction of the sliding drive unit 21 and the second sliding guide module 27 gradually decreases, so that when the transmission unit 22 is subjected to the vibration force of the clamping unit 24, the component force of the vibration force along the telescopic direction of the sliding drive unit 21 is small, so that the transmission unit 22 is not easily disturbed by the vibration and produces an unlocking trend.

[0043] Therefore, the present invention achieves the effect of quickly pressing the battery box base 50 by the pressing unit 24, and at the same time has a high pressing force and high stability and is not easy to loosen.

[0044] In the first embodiment, if Figure 3 As shown, the clamping unit 24 may include a locking tongue 241 and a rotating block 242, and the locking tongue 241 and the rotating block 242 may be fixedly connected. It should be understood that the integral molding of the locking tongue 241 and the rotating block 242 may also be understood as a way of fixed connection. One end of the rotating block 242 is rotatably connected to the bottom bracket 10 through the rotating shaft 26, and the second sliding guide module 27 is a rounded rectangular slot and is provided on the rotating block 242. When the clamping unit 24 starts to move under the action of the sliding drive unit 21, the clamping unit 24 rotates around the rotating shaft 26 located at the lower end of the rotating block 242, and the transmission unit 22 slides in the second sliding guide module 27. In the process of the transmission unit 22 sliding along the second sliding guide module 27 and away from the rotating shaft 26, the locking tongue 241 will gradually press the battery box base 50.

[0045] like Figure 6As shown, the bottom bracket 10 has a support surface 30, and when the bottom bracket 10 is fixed on the vehicle, the support surface 30 is arranged upward. When the pressing unit 24 is locked, the battery box base 50 is located between the locking tongue 241 and the support surface 30, and the support surface 30 can withstand the pressing force generated when the pressing unit 24 is locked. Figure 1 As shown, the second guide section 252 is located on the side of the first guide section 251 close to the locking tongue 241. When the transmission unit 22 moves from the first guide section 251 toward the second guide section 252, the transmission unit 22 also slides along the second sliding guide module 27 away from the rotating shaft 26, and the locking tongue 241 rotates toward the direction of the supporting surface 30 with the rotating shaft 26 as the axis. This is also the process of locking the clamping unit 24.

[0046] In the first embodiment, if Figure 2 As shown, as a preferred embodiment, the extension line of the second sliding guide module 27 can intersect perpendicularly with the axis of the rotating shaft 26. In the rapid swinging stage of the transmission unit 22 in the first guide section 251, since the driving force of the transmission unit 22 on the clamping unit 24 is perpendicular to the length direction of the second sliding guide module 27, the driving force is perpendicular to the line connecting the transmission unit 22 and the rotating shaft 26, so that the driving force of the transmission unit 22 on the clamping unit 24 can be completely converted into the rotational torque of the clamping unit 24, thereby improving the swinging effect on the clamping unit 24.

[0047] In the first embodiment, if Figure 1 As shown, when the transmission unit 22 slides in the second guide section 252 in a direction away from the rotating shaft 26, the force arm of the transmission unit 22 driving the clamping unit 24 to rotate gradually lengthens, and the clamping force of the clamping unit 24 on the battery box base 50 also gradually increases. At the same time, because the angle between the telescopic direction of the sliding drive unit 21 and the second sliding guide module 27 gradually decreases, when the transmission unit 22 is subjected to the vibration force of the clamping unit 24, the component force of the vibration force along the telescopic direction of the sliding drive unit 21 is small, and the transmission unit 22 is not easily disturbed by the vibration and produces an unlocking tendency. In addition, as a preferred embodiment, the second guide section 252 can be set in a straight line, and the straight line shape is easier to process.

[0048] In the first embodiment, if Figure 1 As shown, the first sliding guide module 25 may further include a transition guide segment 253, which may be connected between the first guide segment 251 and the second guide segment 252. The transition guide segment 253 may be arranged in an arc shape, with one end tangent to the first guide segment 251 and the other end tangent to the second guide segment 252. The arrangement of the transition guide segment 253 may make the process of the transmission unit 22 sliding from the first guide segment 251 to the second guide segment 252 more continuous and stable, and less prone to jamming.

[0049] In the first embodiment, if Figure 1 As shown, in the projection of the locking assembly 20 on the reference section, when the transmission unit 22 is located at the end of the second guide section 252 away from the first guide section 251, there is an angle a1 between the length direction of the second sliding guide module 27 and the length direction of the second guide section 252. The value of a1 is 0°~8°, which can meet the self-locking condition of the battery box locking device. The force acting on the locking assembly 20 generated by the bumps of the car will be transmitted to the second guide section 252 located on the bottom bracket 10 through the transmission unit 22. One of its components is perpendicular to the second guide section 252 to generate friction to hinder the transmission part from sliding down to achieve self-locking, and the other downward component is helpful for unlocking. If the angle a1 is too small, it will be inconvenient to unlock, and if it is too large, it will lead to insufficient self-locking force. In this embodiment, the value of a1 is set to 0°~8°, which is helpful for unlocking under the condition that sufficient self-locking force can be achieved.

[0050] In the second embodiment, if Figure 4 As shown, the second guide section 252 can also be arc-shaped, and the arc concave direction of the second guide section 252 can be opposite to the arc concave direction of the first guide section 251, and the arc radius of the second guide section 252 can be greater than the arc radius of the first guide section 251. The arc-shaped setting of the second guide section 252 can make the transition from the first guide section 251 to the second guide section 252 smoother and more stable. When the transmission unit 22 is located at the end of the second guide section 252 away from the first guide section 251, the tangent of the second guide section 252 passing through the position of the transmission unit 22 and the second sliding guide module 27 have an angle a2. The value of a2 is 0°~8°, which can meet the self-locking condition of the battery box locking device. The force acting on the locking assembly 20 generated by the bump of the car will be transmitted to the second guide section 252 located on the bottom bracket 10 through the transmission unit 22, and one of its components is perpendicular to the second guide section 252 to generate friction to hinder the transmission part from sliding down to achieve self-locking, and the other downward component is helpful for unlocking. If the angle a1 is too small, it is not easy to unlock, and if it is too large, the self-locking force will be insufficient. In this embodiment, the value of a2 is set to 0°~8°, which is helpful for unlocking under the condition that sufficient self-locking force can be achieved.

[0051] In the third embodiment, if Figure 5 Combination Figure 1As shown, the first sliding guide module 25 may also include a third guide section 254, the second guide section 252 is located between the first guide section 251 and the third guide section 254, the third guide section 254 is connected with the second guide section 252, the third guide section 254 is parallel to the second sliding guide module 27, and the distance from the rotating shaft 26 to the third guide section 254 gradually increases in the direction away from the second guide section 252. When the transmission unit 22 slides away from the second guide section 252 along the length direction of the third guide section 254, on the one hand, the force arm that the transmission unit 22 drives the clamping unit 24 to rotate can be lengthened, thereby increasing the clamping force. On the other hand, the angle between the piston rod of the sliding drive unit and the sliding guide unit continues to decrease. When the battery box vibrates, the shaking force of the clamping unit 24 borne by the transmission unit 22 is perpendicular to the length direction of the sliding guide unit. Since the angle between the piston rod of the sliding drive unit and the sliding guide unit is reduced in the telescopic direction, the shaking force is close to the piston rod of the sliding drive unit, which makes the piston rod not easy to loosen, and the stability of the battery box after locking can be improved.

[0052] In the first embodiment, if Figure 6 As shown, multiple groups of locking assemblies 20 can be provided, and the multiple groups of locking assemblies 20 can be distributed around the bottom bracket 10, so that the battery box base 50 is evenly stressed and the stability is enhanced.

[0053] In this embodiment, a battery box system is provided. The battery box system includes any battery box locking device of the above embodiments, such as Figure 6 and Figure 7 As shown, the battery box system may also include:

[0054] The battery box assembly may include a battery box body 40 and a base 50, wherein the base 50 is detachably connected to the battery box body 40, and when the battery box assembly is locked on the vehicle by a battery box locking device, the base 50 is pressed between the clamping unit 24 in the battery box locking device and the bottom bracket 10.

[0055] 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 locking device, characterized in that: The battery box locking device comprises a bottom bracket and a locking assembly, and the locking assembly comprises a sliding drive unit, a transmission unit, a fixing frame and a pressing unit; The sliding drive unit is rotatably connected to the bottom bracket, and the transmission unit is detachably connected to the sliding drive unit; the fixed frame is detachably connected to the bottom bracket, and a first sliding guide module is arranged on the fixed frame, the first sliding guide module includes a first guide section and a second guide section, the first guide section and the second guide section are connected, the transmission unit is slidably connected to the fixed frame through the first sliding guide module, and the sliding drive unit drives the transmission unit to slide; A rotating shaft is detachably connected between the clamping unit and the fixing frame, and the clamping unit is rotatably connected to the fixing frame via the rotating shaft; the first guide section is in an arc shape with the rotating shaft as the center, and the distance from the second guide section to the rotating shaft gradually increases in a direction away from the first guide section; The clamping unit is provided with a second sliding guide module, the second sliding guide module is arranged in a straight line, the distance from the rotating shaft to the second sliding guide module gradually changes along the length direction of the second sliding guide module, and the transmission unit is slidably connected to the clamping unit through the second sliding guide module; In the projection of the locking assembly on the reference section, when the transmission unit is located at the connection position between the first guide section and the second guide section, the second guide section extends along the direction of the second sliding guide module away from the first guide section; the reference section is perpendicular to the rotating axis.

2. A battery box locking device according to claim 1, characterized in that: The clamping unit comprises a locking tongue and a rotating block, wherein the locking tongue is fixedly connected to the rotating block, one end of the rotating block is rotatably connected to the bottom bracket via the rotating shaft, and the second sliding guide module is a sliding groove and is provided on the rotating block; The bottom bracket has a supporting surface, and when the bottom bracket is fixed on the vehicle, the supporting surface is arranged upward; the second guide section is located on a side of the first guide section close to the locking tongue, and when the transmission unit moves from the first guide section toward the second guide section, the locking tongue rotates toward the supporting surface.

3. A battery box locking device according to claim 1, characterized in that: An extension line of the second sliding guide module intersects the axis of the rotating shaft perpendicularly.

4. A battery box locking device according to claim 1, characterized in that: The second guide section is arranged in a straight line.

5. A battery box locking device according to claim 4, characterized in that: The first sliding guide module further includes a transition guide segment, which is connected between the first guide segment and the second guide segment, the transition guide segment is tangent to the first guide segment, and the transition guide segment is tangent to the second guide segment.

6. A battery box locking device according to claim 4, characterized in that: In the projection of the locking assembly on the reference section, when the transmission unit is located at the end of the second guide segment away from the first guide segment, the angle between the length direction of the second sliding guide module and the length direction of the second guide segment is 0°~8°.

7. A battery box locking device according to claim 1, characterized in that: The second guide section is arc-shaped, the arc concave direction of the second guide section is opposite to the arc concave direction of the first guide section, and the arc radius of the second guide section is larger than the arc radius of the first guide section; when the transmission unit is located at the end of the second guide section away from the first guide section, the angle between the tangent of the second guide section passing through the position of the transmission unit and the second sliding guide module is 0°~8°.

8. A battery box locking device according to claim 1, characterized in that: The first sliding guide module also includes a third guide segment, the second guide segment is located between the first guide segment and the third guide segment, the third guide segment is connected to the second guide segment, and during the sliding of the transmission unit along the third guide segment, the third guide segment is parallel to the second sliding guide module, and the distance from the rotating shaft to the third guide segment gradually increases in the direction away from the second guide segment.

9. A battery box locking device according to claim 1, characterized in that: The locking components are provided in multiple groups, and the multiple groups of locking components are distributed around the bottom bracket.

10. A battery box system, characterized in that: The battery box system comprises: The battery box locking device according to any one of claims 1 to 9; A battery box assembly, the battery box assembly includes a battery box body and a base, the base is detachably connected to the battery box body, and when the battery box assembly is locked on the vehicle by the battery box locking device, the base is pressed between the pressing unit in the battery box locking device and the bottom bracket.

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