A battery box frame

Abstract

The present invention discloses a battery box frame, which includes a frame body, a support plate, and an elastic member. The interior of the frame body has a cavity for accommodating the battery box. The support plate is located in the cavity and is rotatably connected to the inner wall of the frame body. One end of the elastic member is connected to the support plate, and the other end of the elastic member is connected to the frame body. The elastic member can drive the support plate to rotate and remain in a horizontal position for supporting the battery box. According to the battery box frame of the present invention, the frame body can accommodate the battery box, the elastic member connects the support plate and the frame body, and the elastic member drives the support plate to rotate to the horizontal position. Thus, the support plate can provide support for the battery box accommodated in the frame body. By appropriately designing the shape and size of the frame body, it can be installed at the bottom of the vehicle, thereby realizing bottom battery swapping.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery devices, and particularly relates to a battery box frame that can be used for pure electric heavy-duty trucks in a battery swapping scenario. Background Art

[0002] The use scenario of heavy-duty truck battery swapping is becoming more and more common. However, at present, most battery boxes are installed in a back-mounted manner. Specifically, as Figure 1 shown, the battery box 1002 is located at the back of the cab 1001 and is fixed to the frame crossbeam 1004 through the bottom fixing device 1003.

[0003] When the vehicle adopts this back-mounted battery box, it is fixed only by a few separate fixing points, that is, fixed through the bottom fixing device 1003. This solution has disadvantages such as poor stability due to the low position of the bottom fixing device 1003, the large weight and height of the battery system, which is not conducive to the high-speed long-distance driving of the vehicle and cannot meet the operation under complex road conditions. At the same time, for the back-mounted battery box, the battery swapping station needs to be equipped with relatively high hoisting equipment for battery replacement, resulting in a large occupation of the height space of the battery swapping station and high costs. Summary of the Invention

[0004] In view of the above problems, the present invention discloses a battery box frame for pure electric heavy-duty trucks in a battery swapping scenario to overcome or at least partially solve the above problems.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A battery box frame includes a frame body, a support plate, and an elastic member. The interior of the frame body has a cavity for accommodating the battery box. The support plate is located in the cavity and is rotatably connected to the inner wall of the frame body. One end of the elastic member is connected to the support plate, and the other end of the elastic member is connected to the frame body. The elastic member can drive the support plate to rotate and remain in a horizontal position for supporting the battery box.

[0007] Optionally, the battery box frame has a locking member, and the battery box is provided with a locking pin; the locking member is connected to the frame body, and the locking pin can be fixedly connected to the locking member.

[0008] Optionally, the locking member has a first locking piece, a second locking piece and a clamping groove. The first locking piece and the second locking piece can rotate relative to each other. The first locking piece has a first protrusion, the second locking piece has a second protrusion, a second groove and a third groove. The clamping groove is located between the first locking piece and the second locking piece. The first protrusion can engage with the third groove to close the bottom of the clamping groove. The first protrusion can abut against the second protrusion to open the bottom of the clamping groove. The first protrusion can engage with the second groove to close the bottom of the clamping groove.

[0009] Optionally, the battery box body frame further includes a linkage member. The linkage member is connected to the first locking piece and the second locking piece to drive the first locking piece to rotate and drive the second locking piece to rotate.

[0010] Optionally, the linkage member is a cross bar.

[0011] Optionally, the battery box body frame has a plurality of the locking members. The locking members are arranged on the inner wall of the frame body, and a plurality of locking members located on the same inner wall are sequentially connected by the linkage member.

[0012] Optionally, the locking member further has a first torsion spring and a second torsion spring. The first torsion spring is connected to the first locking piece, the second torsion spring is connected to the second locking piece, and the first torsion spring and the second torsion spring respectively drive the first locking piece and the second locking piece to rotate to close the bottom of the clamping groove.

[0013] Optionally, the battery box body frame further includes a guiding member having a guiding hole. The battery box body is provided with a guiding pin. The guiding pin can reciprocate vertically through the guiding hole.

[0014] Optionally, the locking member further has a housing. The first locking piece and the second locking piece are located inside the housing and are respectively rotatably connected to the housing.

[0015] Optionally, it further includes a mounting plate. The mounting plate is located on the outer wall of the frame body and is connected to the vehicle frame cross beam.

[0016] According to the battery box frame of the present invention, the frame body can accommodate the battery box. The elastic member connects the support plate and the frame body, and the elastic member can drive the support plate to rotate to a horizontal position. Thus, the support plate can provide support for the battery box accommodated in the frame body. In this way, the battery box frame can be installed at the bottom of the vehicle, so that the battery located in the battery box can be installed and fixed at the bottom of the vehicle, improving the fixing stability of the battery. At the same time, bottom battery swapping can be realized, reducing the height space requirements of the swapping station and the swapping cost. Description of the Drawings

[0017] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0018] Figure 1 is a schematic structural diagram of the rear-mounted battery box in the background art of the present invention;

[0019] Figure 2 is a schematic structural diagram of the battery box frame in an embodiment of the present invention;

[0020] Figure 3 is a schematic structural diagram of the battery box in an embodiment of the present invention;

[0021] Figure 4a is a schematic external structural diagram of the connection between the locking member and the linkage member in an embodiment of the present invention;

[0022] Figure 4b is a schematic internal structural diagram of the locking member when the locking pin is disengaged from the card slot and the locking member is in the locked state in an embodiment of the present invention;

[0023] Figure 4c is a schematic internal structural diagram of the locking member when the locking member is in the unlocked state in an embodiment of the present invention;

[0024] Figure 4d is a schematic internal structural diagram of the locking member when the locking pin is located in the card slot and the locking member is in the locked state in an embodiment of the present invention;

[0025] Figure 5 is a schematic structural diagram of the connection between the battery box frame, the battery box and the vehicle frame cross beam in an embodiment of the present invention;

[0026] Figure 6 is a schematic structural diagram of the battery box installed at the bottom of a heavy truck in an embodiment of the present invention. Detailed Embodiments

[0027] To make the objectives, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention in combination with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0028] The following will, with reference to the drawings, detail the technical solutions provided by the embodiments of the present invention.

[0029] Combined Figures 2 to 5 As shown, the battery box frame in this embodiment includes a frame body 1, a support plate 7, and an elastic member 8. There is a cavity inside the frame body 1 for accommodating the battery box 12. The support plate 7 is located near the lower end of the cavity and is rotatably connected to the inner wall of the frame body 1, and can be rotated to a horizontal position perpendicular to the inner wall and a vertical position parallel to the inner wall. One end of the elastic member 8 is connected to the support plate 7, and the other end of the elastic member 8 is connected to the frame body 1. The elastic member 8 can drive the support plate 7 to rotate to the horizontal position.

[0030] When installing the battery box 12 into the cavity of the frame body 1, first, drive the support plate 7 to slowly rotate close to the inner wall of the frame body 1 against the acting force of the elastic member 8, that is, rotate the support plate 7 to the vertical position, so that the opening size at the lower end of the cavity is increased to be able to pass through the battery box 12. Then, lift the battery box 12 from below the support plate 7 towards the cavity of the frame body 1, so that the battery box 12 enters the cavity inside the frame body 1. Then, after the battery box 12 completely enters the cavity of the frame body 1, release the acting force on the support plate 7, and it will rotate reversely to the horizontal position under the restoring force of the elastic member 8, and form a support for the battery box 12 in the vertical direction, thereby completing the installation of the battery box 12 and the frame body 1.

[0031] In this embodiment, the elastic member 8 is selected as a spring, and the elastic member 8 is arranged above the support plate 7. Of course, in other embodiments, according to design requirements, the elastic member 8 can also adopt other structural forms, such as a torsion spring. At this time, the torsion spring can be arranged below the support plate 7, and by rotating the support plate 7 downward to overcome the acting force of the torsion spring, the support plate 7 is rotated to the vertical position.

[0032] Combined Figure 2 and Figure 3As shown, in this embodiment, in addition to the frame body 1, the support plate 7, and the elastic member 8, the battery box body 12 frame further includes a mounting plate 2, mounting screws 3, a guiding member 4, a linkage member 5, a locking member 6, and a pin 9.

[0033] The frame body 1 is composed of a top beam 101, a middle beam 102, a bottom beam 103, connecting ribs 104, and spaced vertical beams 105. Among them, the top beam 101, the middle beam 102, and the bottom beam 103 are arranged in parallel in the horizontal direction, and the spaced vertical beams 105 connect the top beam 101, the middle beam 102, and the bottom beam 103 in the vertical direction to form the frame body 1. The connecting ribs 104 connect the two opposite top beams 101 in the horizontal direction to improve the structural strength of the entire frame body 1. The spaced vertical beams 105 and the middle beam 102 can also strengthen the strength of the frame body 1.

[0034] The mounting plate 2 is located outside the frame body 1, and mounting holes are provided on the mounting plate 2. In this embodiment, the mounting holes are threaded holes, and the mounting screws 3 are threadedly connected to the mounting holes.

[0035] The guiding member 4, the linkage member 5, and the locking member 6 are arranged on the inner wall of the middle beam 102. Among them, the guiding member 4 is provided with a guiding hole 401 in the vertical direction for positioning and guiding the disassembly and assembly process of the battery box body 12. The linkage member 5 is connected to the locking member 6 for driving the locking member 6 to install and fix the battery box body 12 to realize the connection between the battery box body 12 and the frame body 1. In this embodiment, the support plate 7 is located near the bottom beam 103. Therefore, one end of the elastic member 8 is connected to the support plate 7, and the other end is connected to the inner wall of the bottom beam 103.

[0036] The pin 9 penetrates through the bottom beam 103, and both ends of the support plate 7 are movably connected to the bottom beam 103 through the pin 9. Here, the pins 9 at both ends of the same support plate 7 are on the same horizontal line. The cap end of the pin 9 abuts against the outer wall of the bottom beam 103. The pin 9 penetrates through the bottom beam 103 and is inserted into the support plate 7. Here, the depth of the pin 9 inserted into the support plate 7 can be appropriately set. The support plate 7 can perform reciprocating flipping in the vertical direction around the pin 9.

[0037] Figure 3It is a schematic structural diagram of the battery box body 12 in an embodiment of the present invention. The battery box body 12 has an upper cover 1205 and a lower box body 1206, and the upper cover 1205 is threadedly connected to the lower box body 1206. A locking pin 1202, a guiding pin 1204, an auxiliary hole 1203 and a carrier 1201 are provided on the outer periphery of the lower box body 1206. The carrier 1201 is horizontally arranged at a position slightly above the middle of the side surfaces around the lower box body 1206. The locking pin 1202, the guiding pin 1204 and the auxiliary hole 1203 are arranged on the carrier 1201, wherein the locking pin 1202 is horizontally arranged, and the guiding pin 1204 and the auxiliary hole 1203 are vertically arranged.

[0038] The locking pin 1202 can move with the battery box body 12 to form a connection or disconnection with the locking member 6, so as to be used for the disassembly and assembly connection between the battery box body 12 and the frame body 1. The guiding pin 1204 is vertically arranged and can move in and out of the guiding hole 401 as the battery box body 12 moves, so as to form positioning and guiding for the battery box body 12 in the vertical direction. The auxiliary hole 1203 cooperates with the auxiliary member of the lifting mechanism to drive the linkage member 5 to move back and forth.

[0039] Figure 4a It is a schematic external structure diagram of the connection between the locking member 6 and the linkage member 5 in an embodiment of the present invention. As Figure 4a shown, the locking member 6 has a housing 605 and a cover 606 that can be snap-connected. Among them, two holes are horizontally aligned on the housing 605 of the locking member 6. One end of the linkage member 5 is outside the locking member 6, and the other end passes through the hole provided in the housing 605 and is located inside the locking member 6.

[0040] Figure 4b It is a schematic internal structure diagram of the locking member 6 when the locking pin 1202 disengages from the card slot 601 and the locking member 6 is in the locked state. The locking member 6 further has a first locking member 602, a second locking member 603, a support member 604 and a card slot 601. The linkage member 5 has a first linkage member 501 and a second linkage member 502. The first locking member 602 and the second locking member 603 are respectively rotatably connected to the housing 605. The first locking member 602 has a first protrusion 6021 and a first groove 6022. The second locking member 603 has a second protrusion 6031, a second groove 6032 and a third groove 6033, and the second protrusion 6031 is located between the second groove 6032 and the third groove 6033. The support member 604 is connected to the second locking member 603 and can rotate synchronously with the second locking member 603. The card slot 601 is located between the first locking member 602, the second locking member 603 and the support member 604, and with the relative rotation of the first locking member 602 and the second locking member 603, its bottom is opened or closed, so as to form a closed state or an open state.

[0041] Combined with Figure 4b As shown, by horizontally moving the linkage member 5, the first locking member 602 and the second locking member 603 are driven to rotate relative to each other until the first protrusion 6021 engages with the second groove 6032. At this time, the bottom of the support member 604 and the first locking member 602 are closed, causing the card slot 601 to form a closed state.

[0042] Combined with Figure 4c As shown, by horizontally moving the linkage member 5, the first locking member 602 and the second locking member 603 are driven to rotate relative to each other until the first protrusion 6021 abuts against the second protrusion 6031. At this time, the bottom of the support member 604 and the first locking member 602 are offset, causing the bottom of the card slot 601 to be offset, thereby forming an open state.

[0043] Combined with Figure 4d As shown, by horizontally moving the linkage member 5, the first locking member 602 and the second locking member 603 are driven to rotate relative to each other until the first protrusion 6021 engages with the third groove 6033. At this time, the second protrusion 6031 is exactly located in the first groove 6022, and the bottom of the support member 604 and the first locking member 602 are closed, causing the bottom of the card slot 601 to be closed, forming a closed state again, and fixing the locking pin 1202 inside the card slot 601.

[0044] Preferably, in this embodiment, a first torsion spring is provided between the first locking member 602 and the housing 605, and a second torsion spring is provided between the second locking member 603 and the housing 605. Among them, the first torsion spring can drive the first locking member 602 to rotate clockwise relative to the housing 605 as shown in Figure 4b shown, that is, the first linkage member 501 is moved to the right; the second torsion spring can drive the second locking member 603 to rotate counterclockwise relative to the housing as shown in Figure 4b shown, that is, the second linkage member 502 is moved to the left.

[0045] At this time, by setting the first torsion spring and the second torsion spring, a pre-tightening force for rotating the first locking member 602 and the second locking member 603 is respectively formed. In this way, only a single-direction force needs to be applied to drive the first linkage member 501 and the second linkage member 502. By overcoming the pre-tightening force generated by the first torsion spring and the second torsion spring, the relative rotation drive of the first locking member 602 and the second locking member 603 is realized. At the same time, with the help of the pre-tightening force generated by the first torsion spring and the second torsion spring, the first locking member 602 and the second locking member 603 can also be kept in the card slot closed state, that is, the connection state between the locking member 6 and the battery box 12 is maintained, thereby improving the operation convenience of the locking member 6.

[0046] Figure 5It is a schematic structural diagram of the installation layout of the battery box frame, the battery box 12, and the vehicle frame cross member 11 in an embodiment of the present invention. Combining Figure 2 and Figure 5 as shown, wherein, the battery box 12 is installed inside the frame main body 1 of the battery box frame. The mounting plate 2 and the frame main body 1 are of an integral structure, and there are a total of four mounting plates 2 at both ends of the frame main body 1. Threaded holes are provided on the vehicle frame cross member 11, and the mounting screws 3 are screwed into the mounting holes on the mounting plate 2 and the threaded holes on the vehicle frame cross member 11, thereby performing threaded connection.

[0047] Figure 6 It is a schematic structural diagram of the battery box 12 installed at the bottom of a heavy truck in an embodiment of the present invention. As Figure 6 shown, the installed battery box 12 is horizontally stored in the battery box frame. The battery box frame is connected to the vehicle frame cross member 11, and the battery box 12 is located below the driver's cab 13.

[0048] Next, combining Figures 2 to 5 the following will specifically describe the installation method of the present invention.

[0049] When installing the battery box 12, first, with the help of a lifting mechanism, such as a hydraulic cylinder, hold the battery box 12 vertically. Then, with the help of an auxiliary mechanism provided on the lifting mechanism, such as a long rod with a gripper at the top, pass through the auxiliary hole 1203 and connect with the first linkage member 501, and push the first linkage member 501 to the left as Figure 4b shown, so as to drive the first locking member 602 to rotate counterclockwise against the pre-tightening force of the first torsion spring. At the same time, the first protrusion 6021 forms a driving force on the second protrusion 6031 to overcome the pre-tightening force of the second torsion spring on the second locking member 603, so that the first protrusion 6021 and the second protrusion 6031 rotate to the mutually abutting position, that is, the internal state of the locking member 6 changes from Figure 4b to Figure 4c , and the card slot 601 changes from the closed state to the open state. Then, adjust the position of the lifting mechanism so that the guide pin 1204 and the guide hole 401 are aligned vertically.

[0050] Next, drive the support plate 7 to rotate towards the inner wall of the bottom beam 103 against the acting force of the elastic member 8, so that the opening size at the lower end of the frame body 1 becomes larger. The rotation of the support plate 7 can be driven by the jack posts provided on the lifting mechanism, or an additional ejector rod can be used to independently drive the support plate 7. Then, drive the lifting mechanism to lift the battery box body 12 vertically into the cavity of the frame body 1. At the same time, the guide pin 1204 enters the guide hole 401 for positioning, and the locking pin 1202 enters the card slot 601. Next, drive the first linkage member 501 to continue moving leftward by means of the auxiliary mechanism provided on the lifting mechanism, so as to drive the first locking member 602 to continue rotating counterclockwise against the pre-tightening force of the first torsion spring, so that the first protrusion 6021 meshes with the third groove 6033, that is, the internal state of the locking member 6 changes from Figure 4c to Figure 4d , so that the card slot 601 changes from the open state to the closed state, and the locking pin 1202 is restricted in the card slot 601 under the pre-tightening forces of the first torsion spring and the second torsion spring. Next, release the acting force on the support plate 7, so that it rotates reversely to the horizontal position under the acting force of the elastic member 8, forming a vertical support for the battery box body 12, and completing the fixed connection between the battery box body 12 and the frame body 1. Finally, retract the lifting mechanism, thus completing the installation of the battery box body 12 and the battery box frame.

[0051] When removing the battery box body 12, first, use the lifting mechanism to lift the battery box body 12 vertically, so that the locking pin 1202 moves slightly upward vertically in the card slot 601, thereby lifting the battery box body 12 upward by a certain distance. Then, drive the support plate 7 to rotate towards the inner wall of the bottom beam 103 against the acting force of the elastic member 8 to the vertical direction, and once again make the opening size at the lower end of the frame body 1 larger. Then, by means of the auxiliary mechanism provided on the lifting mechanism, such as a long rod with a gripper at the top, pass through the auxiliary hole 1203 to connect with the second linkage member 502 and push the second linkage member 502 to the right as shown in Figure 4d , so as to drive the second locking member 603 to rotate clockwise against the pre-tightening force of the second torsion spring, and at the same time, the second protrusion 6031 forms a driving force on the first protrusion 6021 to overcome the pre-tightening force of the first torsion spring on the first locking member 602, so that the first protrusion 6021 and the second protrusion 6031 rotate to the position where they abut against each other, that is, the internal state of the locking member 6 changes from Figure 4d to Figure 4c , so that the card slot 601 changes from the closed state to the open state.

[0052] Next, the lifting mechanism lifts the battery box body 12 downward, so that the locking pin 1202 disengages from the card slot 601, and the guiding pin 1204 also separates from the guiding hole 401 until the entire battery box body 12 leaves the battery box body frame. Then, along Figure 4c as shown, continue to push the second linkage member 502 to the right to drive the second locking member 603 to continue to rotate clockwise against the pre-tightening force of the second torsion spring, so that the first protrusion 6021 meshes with the second groove 6032, and the locking member 6 is restored to Figure 4b the position state. Finally, release the acting force on the support plate 7, so that it reversely rotates to the horizontal position under the drive of the elastic member 8.

[0053] Here, the first linkage member 501 and the second linkage member 502 are preferably cross bars. And preferably, the plurality of locking members 6 disposed on the inner walls of the same middle beam 102 of the frame body 1 are alternately connected by the first linkage member 501 and the second linkage member 502, whereby the plurality of locking members 6 located on the inner walls of the same middle beam 102 of the frame body 1 can be locked and unlocked simultaneously.

[0054] In addition, although there is no particular limitation, in the specific embodiment of the present invention, among the four inner walls of the middle beam 102 of the frame body 1, each surface has 3 guiding holes 401, and among the two opposite surfaces of the inner wall of the middle beam 102 of the frame body 1, each surface has 5 locking members 6. The number of guiding pins 1204 and locking pins 1202 matches the number of guiding holes 401 and locking members 6.

[0055] In addition, in this embodiment, the pre-tightening force formed between the first locking member 602 and the second locking member 603 and the housing 605 is realized by means of a torsion spring. Of course, in other embodiments, other structures may also be adopted. For example, springs are provided between the outer side wall of the first locking member 602 and the inner wall of the housing 605 and between the outer side wall of the second locking member 603 and the inner wall of the housing 605. Even, it can also be realized by a magnetic drive method. For example, the inner parts of the first locking member 602 and the second locking member 603 are made of magnetically attracting materials, or magnetically attracting materials are coated on the inner parts of the first locking member 602 and the second locking member 603.

[0056] In addition, the present invention may not be provided with the support member 604, but integrate the support member 604 with the second locking member 603, that is, appropriately set the shape of the second locking member 603 so that its bottom has a part for support.

[0057] In addition, it is preferable that the height of the frame body 1 is less than the length and width of the frame body 1, which can reduce the center of gravity height of the battery box frame and improve the safety during long-distance transportation. In addition, the locking member 6 may not have a housing 605, but the first locking member 602 and the second locking member 603 are directly rotatably connected to the inner wall of the middle beam 102 by, for example, screws.

[0058] Furthermore, the mounting plate 2 of the battery box frame on which the battery box 12 is mounted is threadedly connected to the vehicle frame cross beam 11 by mounting screws 3, whereby the battery box frame on which the battery box 12 is mounted can be fixed to the vehicle frame cross beam 11. In this embodiment, two mounting plates 2 are respectively mounted on two opposite side surfaces of the frame body 1. The mounting plate 2 has mounting holes, and the mounting holes are threaded holes. The vehicle frame cross beam 11 also has matching threaded holes. The mounting screws 3 are threadedly connected to the mounting holes on the mounting plate 2 and the threaded holes on the vehicle frame cross beam 11. In addition, the vehicle frame cross beam 11 is in two split sections, which are respectively connected to both ends of the battery box frame. In addition, the present invention is also applicable to vehicles other than heavy trucks that require battery swapping, such as sedans.

[0059] The advantages of the present invention are as follows: Since the overall structure is located below the vehicle chassis and does not occupy the space behind the cab, the freight volume can be increased. The battery box frame matches the bottom battery swapping operation scenario of the battery box, saving the height space of the battery swapping station, reducing costs, and being more beneficial to the site selection and construction of the battery swapping station. Moreover, guiding and supporting structures are arranged around the battery box frame, and there are more locking devices. Compared with the existing bottom fixing method of the battery box, it is more stable and reliable. In addition, the locking of the locking member is achieved by pulling the linkage member in the same direction, and the unlocking of the locking member is also achieved by pulling the linkage member in the same direction. Therefore, unlocking and locking can be completed immediately without adjusting the position of the lifting mechanism separately, and the operation is simple and not prone to errors.

[0060] The above are only the embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, expansions, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A battery box frame, characterized in that, It includes a frame body, a support plate, and an elastic member. The interior of the frame body has a cavity for accommodating a battery box. The support plate is located in the cavity and is rotatably connected to the inner wall of the frame body. One end of the elastic member is connected to the support plate, and the other end is connected to the frame body. The elastic member can drive the support plate to rotate and maintain it in a horizontal position for supporting the battery box. The battery box frame has a locking member, and the battery box is provided with a locking pin. The locking member is connected to the frame body, and the locking pin can be fixedly connected to the locking member. The locking member has a first locking piece, a second locking piece, and a card slot. The first locking piece and the second locking piece can rotate relative to each other. The first locking piece has a first protrusion, the second locking piece has a second protrusion, a second groove, and a third groove. The card slot is located between the first locking piece and the second locking piece. The first protrusion can engage with the third groove to close the bottom of the card slot. The first protrusion can abut against the second protrusion to open the bottom of the card slot. The first protrusion can engage with the second groove to close the bottom of the card slot. The battery box frame further includes a guiding member having a guiding hole, and the battery box is provided with a guiding pin. The guiding pin can reciprocate vertically through the guiding hole.

2. The battery box frame according to claim 1, wherein, The battery box frame further includes a linkage member. The linkage member is connected to the first locking piece and the second locking piece to drive the first locking piece to rotate and drive the second locking piece to rotate.

3. The battery box frame according to claim 2, wherein The linkage member is a cross bar.

4. The battery box frame according to claim 3, characterized in that, The battery box frame has a plurality of the locking members. The locking members are arranged on the inner wall of the frame body, and the plurality of locking members on the same inner wall are sequentially connected by the linkage member.

5. The battery box frame according to claim 1, characterized in that, The locking member further has a first torsion spring and a second torsion spring. The first torsion spring is connected to the first locking piece, and the second torsion spring is connected to the second locking piece. The first torsion spring and the second torsion spring respectively drive the first locking piece and the second locking piece to rotate to close the bottom of the card slot.

6. The battery box frame according to claim 1, characterized in that, The locking member further has a housing. The first locking piece and the second locking piece are located inside the housing and are respectively rotatably connected to the housing.

7. The battery box frame according to any one of claims 1 to 6, characterized in that, It further includes a mounting plate. The mounting plate is located on the outer wall of the frame body and is connected to the vehicle frame cross beam.

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