A bottom bracket assembly, a power battery box assembly and a vehicle

Abstract

The application relates to the technical field of vehicles, in particular to a bottom support assembly, a power battery box assembly and a vehicle. The bottom support assembly comprises a support frame unit, a guide column unit and a lock unit. The support frame unit comprises a support cross beam, a support longitudinal beam, a reinforcing cross beam and a reinforcing longitudinal beam, the reinforcing cross beam comprises a first cross beam and a second cross beam, the first cross beam and the second cross beam are spaced apart in the width direction of the support frame unit, and the guide column unit extends in the height direction of the support frame unit. The lock unit comprises a lock tongue part and a sliding driving part, the included angle between the extension direction of the guide column unit and the extension direction of the telescopic rod of the sliding driving part is an acute angle, and the projection of the first cross beam in the length direction of the first cross beam is arranged in a staggered mode with the sliding driving part. The power battery box assembly comprises the bottom support assembly, a battery box frame and a power battery. The vehicle comprises the power battery box assembly. The application can solve the problem that the bottom support assembly is prone to being stuck during the locking and unlocking processes.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more specifically, to a base assembly, a power battery pack assembly, and a vehicle. Background Technology

[0002] As a core component replacing the engine and fuel tank in traditional gasoline vehicles, the power battery provides continuous power to the drive motor, electronic control system, and vehicle electrical equipment (such as air conditioning and steering system), which is the fundamental prerequisite for vehicle starting and driving. The power battery installation method in new energy vehicles typically involves fixing the power battery in a battery box frame, and then fixing the battery box frame to a base bracket assembly on the vehicle. The base bracket assembly contains a sliding drive component, such as a cylinder, which pushes a locking tongue to move horizontally. The locking tongue presses the battery box frame firmly against the base bracket in the base bracket assembly, thus securing the power battery.

[0003] However, when the vehicle is driven on bumpy roads for a long time, the locking tongue is subjected to a large torque and is prone to bending and deformation, which can damage the piston rod of the sliding drive component and cause the bottom support assembly to get stuck when locking and unlocking. Utility Model Content

[0004] To address the issue of jamming during locking and unlocking of the base support assembly, this application provides a base support assembly, a power battery pack assembly, and a vehicle.

[0005] In a first aspect, this application provides a base support assembly, comprising:

[0006] A support frame unit includes a support crossbeam, a support longitudinal beam, a reinforcing crossbeam, and a reinforcing longitudinal beam. Two support crossbeams and two support longitudinal beams are arranged in parallel. The support crossbeams are perpendicular to and fixedly connected to the support longitudinal beams. Both the support crossbeams and the reinforcing crossbeams extend along the length of the support frame unit. Both the support longitudinal beams and the reinforcing longitudinal beams extend along the width of the support frame unit. The reinforcing crossbeams are fixedly connected between two support longitudinal beams and between two support crossbeams. Each reinforcing crossbeam includes a first crossbeam and a second crossbeam. The first crossbeam and the second crossbeam are spaced apart in the width direction of the support frame unit. The first crossbeam and the second crossbeam are parallel. The reinforcing longitudinal beams are fixedly connected between the first crossbeam and the second crossbeam.

[0007] A guide column unit extends along the height direction of the support frame unit; the guide column unit is fixedly connected to one of the support beams.

[0008] A locking unit includes a locking tongue and a sliding drive unit; the locking tongue is rotatably disposed within the guide post unit; the sliding drive unit is used to drive the locking tongue to extend or retract from the guide post unit; the telescopic rod of the sliding drive unit forms an acute angle with the extension direction of the guide post unit; at least a portion of the sliding drive unit is located outside the guide post unit; the projection of the second crossbeam along its own length direction partially overlaps with the sliding drive unit; the projection of the first crossbeam along its own length direction is offset from the sliding drive unit; the locking unit is housed between the first crossbeam and the support crossbeam closest to the first crossbeam.

[0009] In some embodiments, the base assembly further includes a battery swapping connector; the battery swapping connector is fixedly connected to the support frame unit; two reinforcing crossbeams and two reinforcing longitudinal beams are respectively provided; the distance between the second crossbeams of the two reinforcing crossbeams is greater than the distance between the first crossbeams of the two reinforcing crossbeams; the battery swapping connector is located between the second crossbeams of the two reinforcing crossbeams; the battery swapping connector is located between the two reinforcing longitudinal beams.

[0010] In some embodiments, each corner where the supporting crossbeam and the supporting longitudinal beam are connected is provided with a guide post unit and a locking unit; each corner where the supporting crossbeam and the reinforcing longitudinal beam are connected is provided with a guide post unit and a locking unit.

[0011] In some embodiments, the guide post unit includes a first positioning plate, a second positioning plate, a third positioning plate, a first guide plate, and a second guide plate; the first positioning plate is parallel to the third positioning plate; the second positioning plate is perpendicular to and fixedly connected to both the first and third positioning plates; one end of the first guide plate is fixedly connected to the first positioning plate; the end of the first guide plate away from the first positioning plate is inclined toward the third positioning plate; one end of the second guide plate is fixedly connected to the second positioning plate; the end of the second guide plate away from the second positioning plate is inclined toward the first guide plate; the first guide plate, the second guide plate, and the third positioning plate are sequentially fixedly connected.

[0012] In some embodiments, the guide post unit further includes a pad; the pad is fixedly connected to the side of the first positioning plate facing the third positioning plate; the sliding drive part is rotatably connected to the pad, and the distance between the locking tongue and the third positioning plate is smaller than the distance between the locking tongue and the first positioning plate.

[0013] In some embodiments, the guide post unit further includes a first extension plate and a second extension plate; the first extension plate is welded to the side of the pad facing the third positioning plate; the second extension plate is detachably connected to the side of the third positioning plate facing the pad; and the sliding drive unit is rotatably connected between the first extension plate and the second extension plate.

[0014] In some embodiments, the second positioning plate has a clearance opening at its end near the second guide plate; the locking tongue can extend or retract from the clearance opening; the first positioning plate has a receiving opening; the guide post unit further includes a stainless steel plate; the stainless steel plate wraps around the outer surfaces of the first guide plate, the second guide plate, the first positioning plate, and the second positioning plate; the clearance opening and the receiving opening penetrate the stainless steel plate;

[0015] The locking tongue includes a fixed base, a rotating element, and a first bolt; the rotating element is movably connected to the fixed base; the fixed base is fixed to the guide post unit by the first bolt; part of the first bolt is located on the first positioning plate, and part of the first bolt is located on the third positioning plate; the first bolt on the first positioning plate is located inside the receiving opening.

[0016] In some embodiments, the guide post unit further includes at least one spring steel plate; at least one of the spring steel plates is detachably connected to the outer surface of the second positioning plate; the spring steel plate is convex toward the outer side of the guide post unit.

[0017] Secondly, this application provides a power battery box assembly, including a base support assembly, a battery box frame, and a power battery according to any embodiment of the first aspect; the power battery is fixed in the battery box frame; the battery box frame abuts against the support frame unit of the base support assembly; and the locking unit of the base support assembly presses the battery box frame onto the support frame unit.

[0018] Thirdly, this application provides a vehicle that includes the power battery pack assembly described in the second aspect.

[0019] To address the issue of jamming during locking and unlocking of the base assembly, this application offers the following advantages:

[0020] By setting the piston rod of the sliding drive unit to form an acute angle with the extension direction of the guide column unit, and offsetting the positions of the first and second crossbeams along the direction of the support frame unit, the purpose of reinforcing the crossbeams to avoid obstructing the sliding drive unit is achieved. Thus, when the vehicle is traveling on bumpy roads, the vibration force of the battery box frame on the locking tongue is vertically upward, resulting in a smaller angle between the vibration force and the piston rod of the sliding drive unit. This effectively reduces the vibration torque borne by the sliding drive unit, lowers the probability of deformation of the sliding drive unit, and consequently reduces the probability of jamming during locking and unlocking of the base assembly. Attached Figure Description

[0021] Figure 1 A schematic diagram of the base assembly of Embodiment 1 is shown;

[0022] Figure 2 It shows Figure 1 Top view of the base component;

[0023] Figure 3 It shows Figure 1 A schematic diagram of the guide post unit and locking unit of the base support assembly;

[0024] Figure 4 It shows Figure 3 A front view of the guide post unit and locking unit in the middle;

[0025] Figure 5 It shows Figure 3 Another structural schematic diagram of the guide post unit and locking unit in the middle;

[0026] Figure 6 It shows Figure 3 A schematic diagram of the guide column unit and locking unit after omitting the stainless steel plate;

[0027] Figure 7 A front view of the locking unit of Embodiment 1 is shown;

[0028] Figure 8 It shows Figure 7 A structural schematic diagram of the locking unit from another perspective;

[0029] Figure 9 It shows Figure 7 A schematic diagram of the structure of the fixing base of the locking unit in the middle;

[0030] Figure 10 It shows Figure 7 A schematic diagram of the rotating element of the locking unit in the diagram.

[0031] Figure label:

[0032] 10. Support frame unit; 11. Support crossbeam; 12. Support longitudinal beam; 13. Reinforcing crossbeam; 131. First crossbeam; 132. Second crossbeam; 14. Reinforcing longitudinal beam; 20. Guide column unit; 21. First positioning plate; 211. Pad plate; 212. First extension plate; 213. Second extension plate; 214. Receiving opening; 22. Second positioning plate; 221. Clearance opening; 222. Spring steel plate; 23. Third positioning plate; 24. First guide plate; 25. Second guide plate; 26. Stainless steel plate; 30. Locking unit; 31. Lock tongue; 311. Fixed base; 3111. Arc-shaped slide groove; 312. Rotating element; 3121. First rotating plate; 3122. First rotating shaft; 3123. Second rotating plate; 3124. Second rotating shaft; 3125. Pressing block; 3126. Third rotating shaft; 313. First bolt; 32. Sliding drive unit; 321. Sliding cylinder; 322. Fourth rotating shaft. Detailed Implementation

[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, and are not intended to imply any limitation on the scope of the disclosure.

[0034] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based 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 terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. 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 a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, 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 or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0035] The typical installation method for power batteries in new energy vehicles involves fixing the power battery in a battery box frame, and then fixing the battery box frame to a base bracket assembly on the vehicle. The base bracket assembly has a sliding drive component, such as a cylinder, which pushes a locking tongue to move horizontally. The locking tongue presses the battery box frame firmly against the base bracket in the base bracket assembly, thus securing the power battery.

[0036] However, when the vehicle is driven on bumpy roads for a long time, the locking tongue is subjected to a large torque and is prone to bending and deformation, which can damage the piston rod of the sliding drive component and cause the bottom support assembly to get stuck when locking and unlocking.

[0037] To address the issue of jamming during unlocking and locking of the base support assembly, this application provides a base support assembly, a power battery pack assembly, and a vehicle.

[0038] Example 1:

[0039] Reference Figure 1 This embodiment provides a base support assembly, including a support frame unit 10, a guide column unit 20, and a locking unit 30. The support frame unit 10 includes a support crossbeam 11, a support longitudinal beam 12, a reinforcing crossbeam 13, and a reinforcing longitudinal beam 14. Two support crossbeams 11 and two support longitudinal beams 12 are arranged in parallel. The support crossbeams 11 and 12 are perpendicular to and fixedly connected. The two support crossbeams 11 and 12 are fixedly connected to form a rectangular frame. Both the support crossbeams 11 and 13 extend along the length of the support frame unit 10, and both the support longitudinal beams 12 and 14 extend along the width of the support frame unit 10. The reinforcing crossbeam 13 is fixedly connected between the two support longitudinal beams 12, and the reinforcing longitudinal beam 14 is fixedly connected between the two support crossbeams 11.

[0040] Reference Figure 2 Specifically, the reinforcing crossbeam 13 includes a first crossbeam 131 and a second crossbeam 132. The first crossbeam 131 and the second crossbeam 132 are spaced apart in the width direction of the support frame unit 10. The first crossbeam 131 and the second crossbeam 132 are parallel, and the reinforcing longitudinal beam 14 is fixedly connected between the first crossbeam 131 and the second crossbeam 132. Figure 2 As shown, the reinforcing beam 13 is not a continuous beam; there is a gap between the first beam 131 and the second beam 132. The locking unit 30 is housed between the first beam 131 and the support beam 11 that is closest to the first beam 131. A straight line passing through the midpoint of the support beam 12 and parallel to the support beam 11 serves as a dividing line. On each side of this dividing line, the first beam 131 is further away from the support beam 11 than the second beam 132.

[0041] Reference Figure 1 The guide column unit 20 extends along the height direction of the support frame unit 10, and the guide column unit 20 is fixedly connected to one of the support beams 11. The fixed connection can be welding or bolting, etc.

[0042] Reference Figure 2 , Figure 3 and Figure 4The locking unit 30 includes a locking tongue 31 and a sliding drive 32. The locking tongue 31 is rotatably disposed within the guide post unit 20. The sliding drive 32 drives the locking tongue 31 to extend or retract from the guide post unit 20. The piston rod of the sliding drive 32 forms an acute angle with the extension direction of the guide post unit 20. At least a portion of the sliding drive 32 is located outside the guide post unit 20. The projection of the second crossbeam 132 along its own length direction partially overlaps with the sliding drive 32, while the projection of the first crossbeam 131 along its own length direction is offset from the sliding drive 32. The piston rod of the sliding drive 32 forms an acute angle with the height direction of the support frame unit 10, therefore the position of the sliding drive 32 overlaps with the extension direction of the second crossbeam 132. By positioning the first crossbeam 131 further away from the supporting crossbeam 11, a larger accommodating space is obtained within the support frame unit 10. This avoids the sliding drive unit 32 colliding with the first crossbeam 131 when driving the locking tongue 31, thus preventing locking jamming and ensuring the safe and stable operation of the locking unit 30.

[0043] By setting the piston rod orientation of the sliding drive unit 32 to an acute angle with the extension direction of the guide column unit 20, when the vehicle is driving on bumpy roads, the vibration force of the battery box frame on the latch is vertically upward, making the angle between the vibration force and the piston rod orientation of the sliding drive unit 32 smaller. This effectively reduces the vibration torque borne by the sliding drive unit 32, reduces the probability of deformation of the sliding drive unit 32, and thus reduces the probability of the bottom support assembly getting stuck during locking and unlocking.

[0044] Reference Figure 2 The base assembly also includes a battery swapping connector, which is fixedly connected to the support frame unit 10. There are two reinforcing crossbeams 13 and two reinforcing longitudinal beams 14. The distance between the second crossbeams 132 of the two reinforcing crossbeams 13 is greater than the distance between the first crossbeams 131 of the two reinforcing crossbeams 13. The battery swapping connector is located between the second crossbeams 132 of the two reinforcing crossbeams 13 and between the two reinforcing longitudinal beams 14.

[0045] Reference Figure 2 Each corner where the supporting crossbeam 11 and the supporting longitudinal beam 12 are connected is provided with a guide column unit 20 and a locking unit 30. Each corner where the supporting crossbeam 11 and the reinforcing longitudinal beam 14 are connected is provided with a guide column unit 20 and a locking unit 30.

[0046] Reference Figure 5 and Figure 6The guide column unit 20 includes a first positioning plate 21, a second positioning plate 22, a third positioning plate 23, a first guide plate 24, and a second guide plate 25. The first positioning plate 21 is parallel to the third positioning plate 23, and the second positioning plate 22 is perpendicular to and fixedly connected to the first positioning plate 21 and the third positioning plate 23, respectively. The first positioning plate 21, the second positioning plate 22, and the third positioning plate 23 are all along the support frame unit 10 (refer to...). Figure 1 The height direction is set. One end of the first guide plate 24 is fixedly connected to the first positioning plate 21, and the end of the first guide plate 24 away from the first positioning plate 21 is inclined towards the third positioning plate 23. One end of the second guide plate 25 is fixedly connected to the second positioning plate 22, and the end of the second guide plate 25 away from the second positioning plate 22 is inclined towards the first guide plate 24. The first guide plate 24, the second guide plate 25, and the third positioning plate 23 are fixedly connected in sequence. When installing the battery box frame on the base assembly, the first guide plate 24 and the second guide plate 25 can play a guiding role, which facilitates the rapid positioning of the battery box frame and the support frame unit 10.

[0047] Reference Figure 5 The guide post unit 20 also includes a pad 211, which is fixedly connected to the side of the first positioning plate 21 facing the third positioning plate 23. The sliding drive part 32 is rotatably connected to the pad 211, and the distance between the latch part 31 and the third positioning plate 23 is smaller than the distance between the latch part 31 and the first positioning plate 21. Since the first guide plate 24 and the second guide plate 25 are both inclined, they will compress the internal space of the guide post unit 20. In this application, the latch part 31 is positioned close to the third positioning plate 23, so that the internal space of the guide post unit 20 can be fully utilized.

[0048] Reference Figure 5 The guide post unit 20 also includes a first extension plate 212 and a second extension plate 213. The first extension plate 212 is welded to the side of the pad 211 facing the third positioning plate 23, and the second extension plate 213 is detachably connected to the side of the third positioning plate 23 facing the pad 211. The sliding drive unit 32 is rotatably connected between the first extension plate 212 and the second extension plate 213. Since both sides of the guide post unit 20 need to play a guiding role, the locking parts used for the detachable connection, such as bolts, will protrude to the outside of the guide post unit 20. It is necessary to maintain a certain distance between the guide post unit 20 and the support beam 11 or support longitudinal beam 12 to accommodate the bolts. This will prevent the guide post unit 20 from playing a good guiding role. Therefore, in order to achieve a better guiding role, the guide post unit 20 is designed to be close to the support beam 11 and support longitudinal beam 12 by combining welding and detachable connection.

[0049] Reference Figure 5 and Figure 6The second positioning plate 22 has a clearance opening 221 at the end near the second guide plate 25. The locking tongue can extend or retract from the clearance opening 221. The guide post unit 20 also includes a stainless steel plate 26. The stainless steel plate 26 wraps around the outer surfaces of the first guide plate 24, the second guide plate 25, the first positioning plate 21, and the second positioning plate 22. The first positioning plate 21 has a receiving opening 214. The clearance opening 221 and the receiving opening 214 penetrate the stainless steel plate 26.

[0050] Reference Figure 5 , Figure 6 and Figure 7 The locking tongue portion 31 includes a fixed base 311, a rotating element 312, and a first bolt 313. The rotating element 312 is movably connected to the fixed base 311. The fixed base 311 is fixed to the guide post unit 20 by the first bolt 313. Part of the first bolt 313 is located on the first positioning plate 21, and part of the first bolt 313 is located on the third positioning plate 23. The first bolt 313 on the first positioning plate 21 is located within the receiving opening 214. The fixed base 311 is connected to the first extension plate 212 and the second extension plate 213 respectively in the support frame unit 10 (see reference). Figure 1 The base plate 311 and the second extension plate 212 are positioned at different heights. When the base plate assembly is fixed to the vehicle, the base plate 311 is higher than the first extension plate 212 and the second extension plate 213, and the base plate 311 is higher than the support crossbeam 11 and the support longitudinal beam 12. Therefore, the first bolt 313 will not interfere with the support bolts and the support longitudinal beam 12. Using the first bolt 313 for detachable connection can improve the convenience of maintenance and the speed of installation. At the same time, the receiving opening 214 can accommodate the first bolt 313, thereby preventing the first bolt 313 from protruding to the outside of the stainless steel plate 26 and thus avoiding adverse effects on the guiding function of the guide column unit 20.

[0051] Reference Figure 8 , Figure 9 and Figure 10Specifically, the rotating element 312 includes a first rotating plate 3121, a first rotating shaft 3122, a second rotating plate 3123, a second rotating shaft 3124, a clamping block 3125, and a third rotating shaft 3126. The first rotating plate 3121 is rotatably connected to the fixed base 311 via the first rotating shaft 3122. The second rotating plate 3123 is rotatably connected to the fixed base 311 via the second rotating shaft 3124. The fixed base 311 has an arc-shaped sliding groove 3111; the second rotating shaft 3124 passes through the arc-shaped sliding groove 3111. The second rotating shaft 3124 can roll along the arc-shaped trajectory of the arc-shaped sliding groove 3111. The first rotating plate 3121, the second rotating plate 3123, and the clamping block 3125 are rotatably connected via the third rotating shaft 3126. The first rotating shaft 3122 is parallel to the third rotating shaft 3126 and has a gap, and the second rotating shaft 3124 is parallel to the third rotating shaft 3126 and has a gap. The first rotating shaft 3122 and the second rotating shaft 3124 can be in both overlapping and misaligned states. The radius of the arc-shaped groove 3111 is smaller than the distance between the first rotating shaft 3122 and the second rotating shaft 3124, and the arc-shaped groove 3111 is concave towards the third rotating shaft 3126. The sliding drive unit 32 includes a sliding cylinder 321 and a fourth rotating shaft 322. The piston rod of the sliding cylinder 321 is rotatably connected to the second rotating plate 3123 via the fourth rotating shaft 322. The distance from the fourth rotating shaft 322 to the third rotating shaft 3126 is greater than the distance from the second rotating shaft 3124 to the third rotating shaft 3126.

[0052] The locking unit 30 works as follows: When the locking unit 30 is in the fully unlocked state, the axis of the first rotating shaft 3122 coincides with the axis of the second rotating shaft 3124. At this time, the sliding cylinder 321 pushes the second rotating plate 3123 to rotate around the first rotating shaft 3122 via the fourth rotating shaft 322. The second rotating plate 3123 drives the first rotating plate 3121 to rotate synchronously around the first rotating shaft 3122 via the third rotating shaft 3126. When the axis of the first rotating shaft 3122 coincides with the axis of the second rotating shaft 3124, the first rotating plate 3121 and the second rotating plate 3123 can swing rapidly.

[0053] When the clamping block 3125 swings rapidly to abut against the battery box frame, the piston rod of the sliding cylinder 321 continues to extend, causing the second rotating shaft 3124 to roll along an arc, so that the axis of the second rotating shaft 3124 separates from that of the first rotating shaft 3122. At this time, the clamping block 3125 slowly presses down. Since the distance from the fourth rotating shaft 322 to the third rotating shaft 3126 is greater than the distance from the second rotating shaft 3124 to the third rotating shaft 3126, according to the principle of energy conservation, the moving distance of the piston rod of the sliding cylinder 321 is much greater than the moving distance of the clamping block 3125 pressing down, thus amplifying the force. Therefore, the sliding cylinder 321 only needs to use a small force to achieve a large clamping force of the clamping block 3125 on the battery box frame.

[0054] Reference Figure 6 The guide post unit 20 also includes at least one spring steel plate 222, at least one spring steel plate 222 is detachably connected to the outer surface of the second positioning plate 22, and the spring steel plate 222 is convex toward the outer side of the guide post unit 20.

[0055] Reference Figure 2 and Figure 6 Specifically, in the guide column unit 20 located at the connection inflection point between the supporting crossbeam 11 and the supporting longitudinal beam 12, the guide column unit 20 includes two spring steel plates 222. One spring steel plate 222 is detachably connected to the outer surface of the second positioning plate 22 by bolts, and the other spring steel plate 222 is detachably connected to the outer surface of the first positioning plate 21 by bolts. Furthermore, the bolts on the spring steel plates 222 are all embedded within the spring steel plates 222 to avoid affecting the guiding function of the guide column unit 20. In the guide column unit 20 located at the connection inflection point between the supporting crossbeam 11 and the reinforcing longitudinal beam 14, the guide column unit 20 includes one spring steel plate 222, which is detachably connected to the outer surface of the second positioning plate 22 by bolts. Thus, by providing spring steel plates 222 only towards the edge of the support frame unit 10, the number of spring steel plates 222 positioning the battery box frame is reduced, avoiding over-positioning.

[0056] Example 2:

[0057] Embodiment 2 provides a power battery box assembly, including the base support assembly, battery box frame and power battery as in Embodiment 1. The power battery is fixed in the battery box frame, the battery box frame abuts against the support frame unit 10 of the base support assembly, and the locking unit 30 of the base support assembly presses the battery box frame onto the support frame unit 10.

[0058] Example 3:

[0059] Example 3 provides a vehicle including the power battery pack assembly of Example 2. A supporting crossbeam 11 extends along the width direction of the vehicle, and a supporting longitudinal beam 12 extends along the length direction of the vehicle, i.e., the driving direction. The piston rod of the sliding drive component is inclined upwards. The battery swapping connector establishes a stable power transmission channel and data interaction channel between the power battery and the vehicle body, ensuring both efficient and fast battery swapping while ensuring the safe transmission of high-voltage and low-voltage signals.

[0060] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A base support assembly, characterized in that, The base assembly includes: A support frame unit includes a support crossbeam, a support longitudinal beam, a reinforcing crossbeam, and a reinforcing longitudinal beam. Two support crossbeams and two support longitudinal beams are arranged in parallel. The support crossbeams are perpendicular to and fixedly connected to the support longitudinal beams. Both the support crossbeams and the reinforcing crossbeams extend along the length of the support frame unit. Both the support longitudinal beams and the reinforcing longitudinal beams extend along the width of the support frame unit. The reinforcing crossbeams are fixedly connected between two support longitudinal beams and between two support crossbeams. Each reinforcing crossbeam includes a first crossbeam and a second crossbeam. The first crossbeam and the second crossbeam are spaced apart in the width direction of the support frame unit. The first crossbeam and the second crossbeam are parallel. The reinforcing longitudinal beams are fixedly connected between the first crossbeam and the second crossbeam. A guide column unit extends along the height direction of the support frame unit; the guide column unit is fixedly connected to one of the support beams. A locking unit includes a locking tongue and a sliding drive unit; the locking tongue is rotatably disposed within the guide post unit; the sliding drive unit is used to drive the locking tongue to extend or retract from the guide post unit; the telescopic rod of the sliding drive unit forms an acute angle with the extension direction of the guide post unit; at least a portion of the sliding drive unit is located outside the guide post unit; the projection of the second crossbeam along its own length direction partially overlaps with the sliding drive unit; the projection of the first crossbeam along its own length direction is offset from the sliding drive unit; the locking unit is housed between the first crossbeam and the support crossbeam closest to the first crossbeam.

2. A base support assembly according to claim 1, characterized in that, The base assembly also includes a battery swapping connector; the battery swapping connector is fixedly connected to the support frame unit; two reinforcing crossbeams and two reinforcing longitudinal beams are respectively provided; the distance between the second crossbeams of the two reinforcing crossbeams is greater than the distance between the first crossbeams of the two reinforcing crossbeams; the battery swapping connector is located between the second crossbeams of the two reinforcing crossbeams; the battery swapping connector is located between the two reinforcing longitudinal beams.

3. A base support assembly according to claim 2, characterized in that, Each corner where the supporting crossbeam and the supporting longitudinal beam are connected is provided with a guide post unit and a locking unit; each corner where the supporting crossbeam and the reinforcing longitudinal beam are connected is provided with a guide post unit and a locking unit.

4. A base support assembly according to claim 1, characterized in that, The guide post unit includes a first positioning plate, a second positioning plate, a third positioning plate, a first guide plate, and a second guide plate; the first positioning plate is parallel to the third positioning plate; the second positioning plate is perpendicular to and fixedly connected to both the first and third positioning plates; one end of the first guide plate is fixedly connected to the first positioning plate; the end of the first guide plate away from the first positioning plate is inclined toward the third positioning plate; one end of the second guide plate is fixedly connected to the second positioning plate; the end of the second guide plate away from the second positioning plate is inclined toward the first guide plate; the first guide plate, the second guide plate, and the third positioning plate are sequentially fixedly connected.

5. A base support assembly according to claim 4, characterized in that, The guide post unit also includes a pad; the pad is fixedly connected to the side of the first positioning plate facing the third positioning plate; the sliding drive part is rotatably connected to the pad, and the distance between the locking tongue and the third positioning plate is smaller than the distance between the locking tongue and the first positioning plate.

6. A base support assembly according to claim 5, characterized in that, The guide post unit further includes a first extension plate and a second extension plate; the first extension plate is welded to the side of the pad facing the third positioning plate; the second extension plate is detachably connected to the side of the third positioning plate facing the pad; the sliding drive unit is rotatably connected between the first extension plate and the second extension plate.

7. A base support assembly according to claim 4, characterized in that, The second positioning plate has a clearance opening at its end near the second guide plate; the locking tongue can extend or retract from the clearance opening; the first positioning plate has a receiving opening; the guide post unit also includes a stainless steel plate; the stainless steel plate wraps around the outer surfaces of the first guide plate, the second guide plate, the first positioning plate, and the second positioning plate; the clearance opening and the receiving opening penetrate the stainless steel plate; The locking tongue includes a fixed base, a rotating element, and a first bolt; the rotating element is movably connected to the fixed base; the fixed base is fixed to the guide post unit by the first bolt; part of the first bolt is located on the first positioning plate, and part of the first bolt is located on the third positioning plate; the first bolt on the first positioning plate is located inside the receiving opening.

8. A base support assembly according to claim 7, characterized in that, The guide post unit further includes at least one spring steel plate; at least one of the spring steel plates is detachably connected to the outer surface of the second positioning plate; the spring steel plate is convex towards the outer side of the guide post unit.

9. A power battery pack assembly, characterized in that, The power battery box assembly includes a base support assembly, a battery box frame, and a power battery as described in any one of claims 1-8; the power battery is fixed in the battery box frame; the battery box frame abuts against the support frame unit of the base support assembly; and the locking unit of the base support assembly presses the battery box frame onto the support frame unit.

10. A vehicle, characterized in that, The vehicle includes the power battery pack assembly as described in claim 9.

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