Battery mounting device for electric bicycle

Abstract

The application relates to the technical field of electric bicycles, in particular to a battery mounting device for electric bicycles, which comprises a shell, a cavity is penetrated through the surface of the shell, a first connecting assembly is fixedly connected to the side surface of the shell which is perpendicular to the two openings of the cavity, a connecting groove is arranged in the opposite side wall of one side wall of the shell, the first connecting assembly on the shell is clamped into the connecting groove on another shell, and the connection of the plurality of shells in the same straight line is completed, and the first connecting assembly is movably connected with the connecting groove; the plurality of shells are connected through the first connecting assembly and can be bent to adapt to different radii of different surfaces of electric bicycles; and the plurality of shells are arranged in a straight line along the surface, can adapt to different vehicle types, and increase the installation application range of the battery mounting frame.

Description

A battery mounting device for electric bicycles Technical Field

[0001] This invention relates to the field of electric bicycle technology, specifically to a battery mounting device for electric bicycles. Background Technology

[0002] Electric bicycles are a type of bicycle that uses a battery and an electric motor to provide power when pedaling, thus relieving fatigue.

[0003] The fixed space for batteries on most electric bicycles limits the number of batteries that can be installed, resulting in a fixed range. When traveling for extended periods, the battery can easily run out, forcing riders to rely on pedals for propulsion. However, the heavy batteries become a burden, and installing multiple, bulky batteries increases the bicycle's weight, making short-distance pedaling more difficult. This forces riders to rely primarily on electric power with human assistance, significantly reducing the enjoyment of riding. Furthermore, the batteries are typically installed under the seat or in the support rod near the front wheel, where the limited space restricts the installation of more batteries.

[0004] Therefore, a new technical solution is needed to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a battery mounting device for electric bicycles. By connecting the housing in the height, thickness, and width directions, the housing can be spliced ​​with battery mounting frames of different shapes and sizes. Furthermore, the first and second connecting components also ensure that the battery mounting frames are compatible with various types of electric bicycle models, thereby enhancing the usability.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A battery mounting device for an electric bicycle includes a housing with a cavity penetrating its surface. A first connecting component is fixedly connected to one side of the housing perpendicular to the two openings of the cavity. A connecting groove is formed on the opposite side wall of one side wall of the housing. The first connecting component on the housing is engaged in the connecting groove on another housing to complete the connection of several housings on the same straight line. The first connecting component is movably connected to the connecting groove. The device also includes several locking blocks fixedly connected to one opening end face of the housing. A locking groove is formed at one end of the housing away from the locking block, which abuts against the locking block on the other housing. A stop block is provided on the inner wall of the locking groove. The stop block moves linearly relative to the locking groove. When the stop block slides into the locking groove, it abuts against the locking block on the other housing and completes the connection of several housings distributed along the opening direction of the housing. The movement trajectory of the stop block is parallel to the opening plane of the cavity and the end face of the housing near the first connecting component. A second connecting component is fixedly connected to the end face of the housing near the vehicle body. The second connecting component connects several housings to the vehicle body.

[0007] By adopting the above technical solution, several housings are connected together in the left-right direction using the first connecting component to adapt to the long and narrow shape of the electric bicycle, increasing the adaptability of the battery to be installed on the electric bicycle. At the same time, when connecting two adjacent housings, the first connecting component can rotate at its connection point, allowing several housings to bend to adapt to the surface of the vehicle body, so that the housings fit the arrangement of the vehicle body and increase the connection effect.

[0008] The invention is further configured such that: a copper contact plate is fixedly connected to each of the two inner walls of the cavity near the connecting groove and the first connecting component; several contact plates are electrically connected by wires; and the inner wall of the cavity has a through hole for the wires to pass through.

[0009] By adopting the above technical solution, the battery is inserted into the cavity and its positive and negative terminals are electrically connected to two power boards respectively. Then, several batteries are connected by wires to provide power to the motor of the electric bicycle. At the same time, the battery can be protected from direct sunlight by using a single shell to wrap the battery. When installed on the outside of the vehicle body, it can protect the battery and prevent it from being hit by external impacts.

[0010] The present invention is further configured such that: a plurality of the housings are connected in the direction of the cavity opening to form an integral body, and the plurality of cavities are connected to form a cavity for accommodating the battery, a bottom plate is detachably connected to the opening of the lower housing, and the height of the cavity is 1.25 times the height of the battery, and the thickness of the bottom plate is 0.25 times the height of the battery.

[0011] By adopting the above technical solution, when several housings are stacked along the direction of the cavity opening, the several cavities are interconnected and form a larger space to accommodate batteries. By utilizing the limitations of cavity height and battery height, the space to accommodate batteries can hold more batteries, further increasing battery reserves and increasing range.

[0012] The present invention is further configured such that: the first connecting component includes a plurality of connecting blocks, the connecting blocks are fixedly connected to the end of the housing away from the connecting groove, the connecting blocks are arranged in a ring array on the end face of the housing, and the plurality of connecting blocks have a circumferential angle of 180°, and the end faces of the connecting blocks near and away from their circumferential center are spherical, and the spherical end faces of the plurality of connecting blocks are coplanar and fit with the inner wall of the connecting groove, and the end of the connecting block away from the housing is fixedly connected to a protrusion, the inner wall of the connecting groove is provided with a sliding groove that slides with the protrusion, and the upper end of the housing is provided with two downwardly recessed grooves, the grooves are provided with threaded holes, and the two grooves are respectively located on the housing away from and near the first connecting component, and the adjacent grooves on the two housings that are close to each other are integrated into one, and a cover plate is connected thereto by bolts.

[0013] By adopting the above technical solution, when the first connecting assembly connects the two shells, the spherical structure of the connecting block and the connecting groove is used to first rotate the first connecting assembly on one shell by 180° and align it with the connecting groove on the other shell. Then, the shell and the first connecting assembly are rotated by 180° and the connecting block is slid into the connecting groove. The two shells are connected by its spherical structure. At the same time, the connection between the cover plate and the threaded hole on the groove not only connects the two adjacent shells and increases the connection strength, but also, when the bolts are loosened appropriately and there is a certain amount of room for movement between the two adjacent shells, the cover plate can restrict the rotation between the two adjacent shells, ensuring that the connecting assembly will not rotate out of the connecting groove, further increasing the connection strength. At the same time, the spherical connection method makes it possible to...

[0014] The present invention is further configured such that: the first connecting assembly further includes a protruding block, a connecting plate, and a ring strip located between the connecting block and the housing; the protruding block is fixedly connected to the end face of the housing and is cylindrical, and its bottom surface is fixedly connected to the end face of the housing; a plurality of connecting plates are fixedly connected to the top surface of the protruding block by a flexible ring strip; the connecting block is fixedly connected to the connecting plate; a plurality of connecting plates are distributed around the top surface of the protruding block, and the number and angle of the plurality of connecting plates are the same as those of the connecting block; one end of the plurality of connecting plates away from the center of the surrounding area is fixedly connected by another annular ring strip; and the ring strip is fixedly connected to the side surface of the protruding block by a plurality of supporting springs.

[0015] By adopting the above technical solution, when several connecting blocks slide into the connecting groove, the support spring keeps the ring bar and connecting plate parallel to the end face of the housing. When it is necessary to bend the two housings to adapt to the shape of the vehicle body, the connecting blocks rotate in the connecting groove. By utilizing the structure of the connecting plate, ring bar and protruding block, the first connecting assembly can use the support spring to provide its stroke when it rotates relative to the housing. At the same time, the connecting plate and ring bar can also be used to fix the connecting block and the protruding block, preventing free rotation between two adjacent housings.

[0016] The invention is further configured such that: the card slot has a sliding groove on the side wall near the cavity for the abutment block to slide, and the sliding groove is away from the cavity and extends outward; the abutment block is fixedly connected to the side wall of the sliding groove near the cavity by a return spring; and a hook body is fixedly connected to the end of the card block away from the housing and extends outward parallel to the lower end face of the housing; when the card block slides into the card slot, the lower end of the abutment block abuts against the upper surface of the hook body.

[0017] By adopting the above technical solution, the locking block on the bottom wall of the upper housing is inserted into the slot, and then the return spring pulls the abutment into the slot, causing the abutment to abut against the hook on the locking block, thereby completing the connection between the upper and lower housings. This allows several housings to be stacked and connected in the direction of cavity extension and can accommodate multiple batteries, further improving the battery installation effect on electric bicycles and increasing the number and capacity of batteries installed. Moreover, when the surface of the vehicle body is curved, the locking block on the upper housing can be locked in different positions in different slots, preventing the curved surface of the vehicle body from affecting the installation, meeting the installation conditions of different vehicle models, and increasing applicability.

[0018] The present invention is further configured such that: the second connecting component includes a fixed rod rotatably connected to the lower end of the housing, the rotation center of the fixed rod is located on the bottom surface of the housing near the projection point of the abutment block, the fixed rod is arc-shaped and a fixed rope is fixedly connected to its other end, and a fixed hole for the fixed rope to pass through is provided on the bottom surface of the housing away from the fixed rod.

[0019] By adopting the above technical solution, when installing several housings on the pole-shaped position of the electric bicycle, the fixing rod and fixing rope are wrapped around the pole on the electric bicycle, and then the fixing rope is passed through the fixing hole and knotted to lock, thus completing the installation connection. When installing several housings on a flat position on the electric bicycle, the fixing rope is passed through the gap on the electric bicycle and the fixing rod is rotated to abut against the ground of the housing. Then the fixing rod is inserted into the sliding groove on the electric bicycle to complete the installation. At the same time, the protruding fixing rope can further secure the housing to the electric bicycle.

[0020] The invention is further configured to include a sealing plate, which is fixedly connected to the cavity opening positions in the assembled plurality of housings via threaded holes.

[0021] By adopting the above technical solution, when several housings are installed on the vehicle body, the cavity on the upper housing is blocked by the sealing plate to prevent the battery inside the cavity from falling out, and also to protect the battery from direct sunlight and external impact.

[0022] The present invention is further configured such that: one end of the abutment away from the cavity is provided with a receiving groove, and the inner wall of the receiving groove abuts the portion of the abutment on the other housing that extends out of the sliding groove.

[0023] By adopting the above technical solution, the structure in which the inner wall of the receiving groove abuts against the part of the sliding groove of the block on another shell can restrict the degree of freedom of several shells in the direction of cavity extension when they are arranged side by side in another direction, increase the connection strength between several shells, and enable the shells to be stacked in a cubic structure. They are then connected at the top using a sealing plate, further increasing the scope of use.

[0024] The present invention is further configured such that: the number of card blocks is four, and they are arranged in a rectangular shape, with two card blocks corresponding to one card slot.

[0025] By adopting the above technical solution and utilizing the structure of the card block and the card slot, when there is a deviation between the upper and lower shells, the card block can be inserted into the card slot on the different shells, further increasing the connection effect between the upper and lower shells.

[0026] In summary, the present invention has the following beneficial effects:

[0027] Several housings are connected using a first connecting component, allowing them to bend and adapt to the different curvatures of various electric bicycle surfaces. Furthermore, the housings are arranged in a straight line along the surface, accommodating different vehicle models and increasing the applicability of the battery mounting frame.

[0028] The structure allows several shells to be stacked in their height direction by using an upper locking block to fit into a lower locking slot, thus filling the flat space on the electric bicycle. At the same time, the upper and lower shells can control lateral deviation, meaning that the upper shell can be fixed in a position where it is not directly opposite the lower shell, in order to adapt to flat spaces of different shapes and further increase the range of uses.

[0029] By utilizing the connection structure between the fixed rod and the fixed rope and the electric bicycle pole and plane, several stacked and arranged shells can be fixedly connected to the bicycle, which not only meets the needs of different models, but also allows for detachable installation, greatly increasing practicality. Attached Figure Description

[0030] Figure 1 is a schematic diagram of the structure of the present invention;

[0031] Figure 2 is a schematic diagram of the structure of the present invention;

[0032] Figure 3 is a schematic diagram of the shell structure in this invention;

[0033] Figure 4 is a cross-sectional schematic diagram of the shell in this invention;

[0034] Figure 5 is a schematic diagram of the combined structure of the shell in this invention;

[0035] Figure 6 is a schematic diagram of the combined structure of the shell in this invention;

[0036] Figure 7 is a schematic diagram of the cover plate in this invention.

[0037] In the picture:

[0038] 11. Shell; 12. Cavity; 13. Abutment; 14. Sliding groove; 15. Slot; 16. Receiving groove; 17. Return spring; 18. Protruding block; 19. Connecting plate; 20. Ring bar; 21. Support spring; 22. Connecting block; 23. Electrical contact plate; 24. Wire hole; 25. Connecting groove; 26. Sliding groove; 27. Fixing rod; 28. Fixing rope; 29. ​​Fixing hole; 30. Slot; 31. Sink; 32. Sealing plate; 33. Base plate; 34. Cover plate. Detailed Implementation

[0039] The present invention will now be described in detail with reference to the accompanying drawings of the embodiments. Embodiments

[0040] As shown in Figures 1 to 6, this battery mounting device for electric bicycles includes a housing 11 with a cavity 12 extending through its surface. A first connecting component is fixedly connected to one side of the housing 11 perpendicular to the two openings of the cavity 12. A connecting groove 25 is formed on the opposite side wall of one side wall of the housing 11. The first connecting component on the housing 11 is inserted into the connecting groove 25 on another housing 11, thus connecting several housings 11 on the same straight line. The first connecting component is movably connected to the connecting groove 25. A copper contact plate 23 is fixedly connected to each of the two inner walls of the cavity 12 near the connecting groove 25 and the first connecting component. Several contact plates 23 are electrically connected through wires. A wire hole 24 for wires to pass through is provided through the inner wall of the cavity 12.

[0041] As shown in Figures 3, 4, 5, and 7, the first connecting assembly includes several connecting blocks 22. Each connecting block 22 is fixedly connected to the end of the housing 11 away from the connecting groove 25. The connecting blocks 22 are arranged in a circular array on the end face of the housing 11, with a circumferential angle of 180°. The end faces of each connecting block 22, near and away from its circumferential center, are spherical, and the spherical surfaces of the end faces of the connecting blocks 22 are coplanar and fit against the inner wall of the connecting groove 25. A protrusion is fixedly connected to the end of each connecting block 22 away from the housing 11. The connecting groove 25... The inner wall has a sliding groove 26 for sliding with the protrusion, and the upper end of the housing 11 has two downwardly recessed grooves 31. Threaded holes are formed in the grooves 31, and the two grooves 31 are located on the housing 11 at positions away from and near the first connecting assembly, respectively. The adjacent grooves 31 on two adjacent housings 11 are integrated into one unit, and a cover plate 34 is bolted to it. The first connecting assembly also includes a protruding block 18, a connecting plate 19, and a ring 20 located between the connecting block 22 and the housing 11. The protruding block 18 is connected to the housing 11. One end face is fixedly connected and cylindrical, and its bottom surface is fixedly connected to the end face of the housing 11. Several connecting plates 19 are fixedly connected to the top surface of the protruding block 18 by flexible ring strips 20. The connecting block 22 is fixedly connected to the connecting plates 19. Several connecting plates 19 are distributed around the top surface of the protruding block 18, and the number and angle of the several connecting plates 19 are the same as those of the connecting block 22. The end of several connecting plates 19 away from the center of the encirclement is fixedly connected by another annular ring strip 20. The ring strip 20 is connected to the side of the protruding block 18 by... Several support springs 21 are fixedly connected. The second connecting assembly includes a fixed rod 27 rotatably connected to the lower end of the housing 11. The rotation center of the fixed rod 27 is located on the bottom surface of the housing 11 near the projection point of the abutment block 13. The fixed rod 27 is arc-shaped and its other end is fixedly connected to a fixing rope 28. A fixing hole 29 for the fixing rope 28 to pass through is provided on the bottom surface of the housing 11 away from the fixed rod 27. The assembly also includes a sealing plate 32. The sealing plate 32 is fixedly connected to the opening of the cavity 12 in the assembled housing 11 through a threaded hole.

[0042] The battery is installed inside the cavity 12, and then the positive and negative terminals of the battery are electrically connected via the terminal block 23 inside the cavity 12. Several batteries are then electrically connected via wires and connected to an external motor controller. The wire hole 24 allows the wires to pass through the several housings 11, facilitating wiring and preventing damage to the wires from external impacts. The several housings 11 are then arranged. First, the protruding blocks of two adjacent housings 11 are flipped 180 degrees, that is, their opening positions in the cavity 12 are reversed. Then, the connecting block 22 on one housing 11 is aligned with the connecting groove 25 on another housing 11. The housings 11 are then rotated 180 degrees, at which point the connecting block 22 on the housing 11 slides into the connecting groove 25 on the other housing 11. Meanwhile, the connecting block 22 has a protrusion, and the inner wall of the connecting groove 25 has a sliding groove 26 for the protrusion to slide. By utilizing the spherical structure of the connecting block 22 and the connecting groove 25 and the sliding groove 26, two adjacent shells 11 are connected, and the two adjacent shells 11 can rotate relative to each other. That is, the connection of several shells 11 can adapt to the arc-shaped arrangement of the electric bicycle body. When several shells 11 and the battery are installed on the body, they can adapt to different body environments. When the connecting structure of the shells 11, connecting plate 19, connecting block 22 and ring 20 rotates, the frustum structure of the protruding block 18 allows the connecting block 22 to rotate relative to the shell 11, preventing the adjacent shells 11 from rotating. The contact between the two housings prevents rotation, but the support spring 21 and the ring bar 20 stabilize the shape of the connecting plate 19 and the connecting blocks 22, ensuring that the connecting blocks 22 are always on the same spherical surface, facilitating the connection between the two housings 11. Furthermore, even when the two housings 11 rotate, some of the connecting blocks 22 can maintain the connection between the two housings 11, increasing the connection effect. The cover plate 34 or sealing plate 32 is then connected to the threaded holes on the sink 31 via bolts, preventing the connecting blocks 22 from unscrewing due to rotation between adjacent housings 11 and blocking the opening of the cavity 12 to prevent external interference with the battery inside the cavity 12. The contact plate 23 is made of copper. The materials used are as follows: the shell 11 is made of insulating plastic, and the ring strip 20 is made of gauze. After connecting several adjacent shells 11 into a straight line, the fixing rod 27 and fixing rope 28 are wrapped around the rod-like structure on the electric bicycle. The fixing rope 28 is then passed through the fixing hole 29, tightened, and knotted, completing the connection between the shell 11 and the rod-like structure on the electric bicycle. When installing several shells 11 on a larger flat surface, several grooves are cut into the vehicle body. The fixing rope 28 is then passed through the fixing hole 29 and tightened. The fixing rod 27 is then inserted into the groove on the vehicle body, completing the installation. This allows for the connection of several shells 11 into a straight line and detachable connection to different surfaces of the vehicle body, greatly increasing the usability. Example

[0043] As shown in Figures 1 to 6, the device includes a housing 11 with a cavity 12 extending through its surface. A first connecting assembly is fixedly connected to one side of the housing 11 perpendicular to the two openings of the cavity 12. A connecting groove 25 is formed on the opposite sidewall of one sidewall of the housing 11. The first connecting assembly on the housing 11 engages with the connecting groove 25 on another housing 11, thus connecting several housings 11 on the same straight line. The first connecting assembly is movably connected to the connecting groove 25. The device also includes several locking blocks 30 fixedly connected to one opening end face of the housing 11. A locking groove 15 is formed at the end of the housing 11 away from the locking blocks 30, which abuts against the locking blocks 30 on another housing 11. The inner wall of the locking groove 15 is provided with a stop block 13. The abutment 13 moves linearly relative to the slot 15. When the abutment 13 slides into the slot 15, it abuts against the block 30 on another housing 11 and completes the connection of several housings 11 distributed along the opening direction of the housing 11. The movement trajectory of the abutment 13 is parallel to the opening plane of the cavity 12 and the end face of the housing 11 near the first connecting component. The end face of the housing 11 near the vehicle body is fixedly connected to the second connecting component. The second connecting component connects several housings 11 to the vehicle body. A copper contact plate 23 is fixedly connected to the inner wall of the cavity 12 near the connecting groove 25 and the two inner walls of the first connecting component. Several contact plates 23 are electrically connected through wires. The inner wall of the cavity 12 has a through hole 24 for wires to pass through.

[0044] As shown in Figures 3 to 6, several housings 11 are connected in the opening direction of the cavity 12 to form a single unit, and the several cavities 12 are interconnected to form a cavity for accommodating the battery. A base plate 33 is detachably connected to the opening of the lower housing 11. The height of the cavity 12 is 1.25 times the height of the battery, and the thickness of the base plate 33 is 0.25 times the height of the battery. The slot 15 has a sliding groove 14 on the side wall near the cavity 12 for the sliding block 13 to slide. The sliding groove 14 extends outward from the cavity 12. The block 13 and the sliding groove 14 are connected by a return spring. The spring 17 is fixedly connected, and the end of the locking block 30 away from the housing 11 is fixedly connected to a hook body that is parallel to the lower end face of the housing 11 and extends outward. When the locking block 30 slides into the locking groove 15, the lower end of the abutment block 13 abuts against the upper surface of the hook body. The second connecting component includes a fixed rod 27 rotatably connected to the lower end of the housing 11. The rotation center of the fixed rod 27 is located on the bottom surface of the housing 11 near the projection point of the abutment block 13. The fixed rod 27 is arc-shaped and its other end is fixedly connected to a fixing rope 28. A fixing hole 29 for the fixing rope 28 to pass through is passed through the bottom surface of the housing 11 away from the fixed rod 27.

[0045] As shown in Figure 5, it also includes a sealing plate 32, which is fixedly connected to the cavity 12 opening position in the assembled housing 11 through a threaded hole.

[0046] As shown in Figures 3 and 4, one of the abutment blocks 13 has a receiving groove 16 at one end away from the cavity 12, and the inner wall of the receiving groove 16 abuts against the part of the abutment block 13 on the other housing 11 that extends out of the sliding groove 14. There are four locking blocks 30, which are arranged in a rectangular shape, and two locking blocks 30 correspond to one locking groove 15.

[0047] When the upper surface of an electric bicycle has a large space, another set of housings 11 connected in a straight line is placed on the upper surface of the set of housings 11 connected in a straight line. The bottom plate 33 on the upper housing 11 is removed, and the abutment 13 on the lower housing 11 is pulled outward along the sliding groove 14. Then, the locking block 30 on the bottom surface of the upper housing 11 is slid into the locking groove 15, and the abutment 13 is released. The abutment 13 rebounds under the elastic force of the return spring 17 and locks the hook on the locking block 30, thus completing the connection between the upper housing 11 and the lower housing 11. A wall-shaped battery mounting frame can then be placed. The vertically placed housings 11 connect the cavities 12 inside, forming a larger cavity to accommodate batteries. By utilizing the structure of the cavity 12 and the battery structure design, more batteries can be stored in the larger cavity, reducing the impact of the thickness of the bottom plate 33 on the battery volume, and greatly increasing the battery capacity of the battery mounting frame. The number of batteries, and when the mounting surface and side walls of the vehicle body are curved, the connection structure of the locking block 30 and the strip-shaped locking groove 15 is used to allow the upper housing 11 to be offset relative to the lower housing 11 in its straight direction. At this time, the bottom plate 33 on the upper housing 11 is not disassembled. That is, the first connecting component is used to connect several housings 11 in a straight line. The connection method of the locking block 30 and the locking groove 15 is used to adapt to the shape of the side wall of the electric bicycle, increase the installation effect, increase the number of battery cases on the electric bicycle, and provide power when the user occasionally travels a long distance, thus increasing the usage effect. When there is a large installation space on the electric bicycle, several housings 11 are arranged in front and behind, and the receiving groove 16 on the abutment 13 is locked with the abutment 13 on the housing 11 to complete the connection, thereby realizing the cubic construction of the battery mounting frame to meet the usage requirements.

[0048] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A battery mounting device for an electric bicycle, comprising a housing (11), characterized in that: The shell (11) has a cavity (12) extending through its surface. A first connecting component is fixedly connected to one side of the shell (11) perpendicular to the two openings of the cavity (12). A connecting groove (25) is provided on the opposite side wall of one side wall of the shell (11). The first connecting component on the shell (11) is inserted into the connecting groove (25) on another shell (11) to complete the connection of several shells (11) on the same straight line. The first connecting component is movably connected to the connecting groove (25). The shell (11) also includes several locking blocks (30) fixedly connected to one opening end face of the shell (11). The end of the shell (11) away from the locking blocks (30) is provided with a connection to the other shell. The body (11) has a card slot (15) with a card block (30) abutting it, and the inner wall of the card slot (15) is provided with a stop block (13). The stop block (13) moves linearly relative to the card slot (15). When the stop block (13) slides into the card slot (15), it abuts against the card block (30) on another housing (11) and completes the connection of several housings (11) distributed along the opening direction of the housing (11). The movement trajectory of the stop block (13) is parallel to the opening plane of the cavity (12) and the end face of the housing (11) near the first connecting component. The end face of the housing (11) near the vehicle body is fixedly connected to a second connecting component. The second connecting component connects several housings (11) to the vehicle body.

2. The battery mounting device for an electric bicycle according to claim 1, characterized in that: The inner wall of the cavity (12) is close to the connecting groove (25), and each of the two inner walls of the first connecting assembly is fixedly connected to a copper contact plate (23). Several contact plates (23) are connected by wires. The inner wall of the cavity (12) has a through hole (24) for wires to pass through.

3. The battery mounting device for an electric bicycle according to claim 2, characterized in that: Several housings (11) are connected in the direction of the opening of the cavity (12) to form an integral unit, and the several cavities (12) are connected to form a cavity for accommodating the battery. A base plate (33) is detachably connected to the opening of the lower housing (11), and the height of the cavity (12) is 1.25 times the height of the battery, and the thickness of the base plate (33) is 0.25 times the height of the battery.

4. The battery mounting device for an electric bicycle according to claim 3, characterized in that: The first connecting component includes a plurality of connecting blocks (22). The connecting blocks (22) are fixedly connected to one end of the housing (11) away from the connecting groove (25). The connecting blocks (22) are arranged in a ring array on the end face of the housing (11), and the plurality of connecting blocks (22) are arranged at an angle of 180°. The end faces of the connecting blocks (22) near and away from their center of rotation are spherical, and the spherical surfaces of the end faces of the plurality of connecting blocks (22) are coplanar and fit into the inner wall of the connecting groove (25). The connecting blocks (22) are located away from the housing. (11) One end is fixedly connected to a protrusion, and the inner wall of the connecting groove (25) is provided with a sliding groove (26) that slides with the protrusion. The upper end of the housing (11) is provided with two downward recessed grooves (31). The grooves (31) are provided with threaded holes. The two grooves (31) are located on the housing (11) at positions away from and close to the first connecting component, respectively. The grooves (31) on two adjacent housings (11) that are close to each other are integrated into one unit, and a cover plate (34) is connected therein by bolts.

5. A battery mounting device for an electric bicycle according to claim 4, characterized in that: The first connecting assembly further includes a protruding block (18), a connecting plate (19), and a ring strip (20) located between the connecting block (22) and the housing (11). The protruding block (18) is fixedly connected to the end face of the housing (11) and is cylindrical, and its bottom surface is fixedly connected to the end face of the housing (11). Several connecting plates (19) are fixedly connected to the top surface of the protruding block (18) through flexible ring strips (20). The connecting block (22) is fixedly connected to the connecting plate (19). Several connecting plates (19) are distributed around the top surface of the protruding block (18), and the number and angle of the several connecting plates (19) are the same as those of the connecting block (22). One end of several connecting plates (19) away from the center of the surrounding area is fixedly connected through another annular ring strip (20). The ring strip (20) is fixedly connected to the side of the protruding block (18) through several support springs (21).

6. A battery mounting device for an electric bicycle according to claim 5, characterized in that: The slot (15) has a sliding groove (14) on the side wall near the cavity (12) for the sliding block (13) to slide. The sliding groove (14) is away from the cavity (12) and extends outward. The block (13) and the sliding groove (14) are fixedly connected to the side wall near the cavity (12) by a return spring (17). The end of the block (30) away from the housing (11) is fixedly connected to a hook that is parallel to the lower end face of the housing (11) and extends outward. When the block (30) slides into the slot (15), the lower end of the block (13) abuts against the upper surface of the hook.

7. A battery mounting device for an electric bicycle according to claim 6, characterized in that: The second connecting assembly includes a fixed rod (27) rotatably connected to the lower end of the housing (11). The rotation center of the fixed rod (27) is located on the bottom surface of the housing (11) near the projection point of the abutment (13). The fixed rod (27) is arc-shaped and a fixed rope (28) is fixedly connected to its other end. A fixed hole (29) for the fixed rope (28) to pass through is provided on the bottom surface of the housing (11) away from the fixed rod (27).

8. A battery mounting device for an electric bicycle according to claim 4, characterized in that: It also includes a sealing plate (32), which is fixedly connected to the cavity (12) opening position in the combined housing (11) by a threaded hole.

9. A battery mounting device for an electric bicycle according to claim 6, characterized in that: One of the abutments (13) has a receiving groove (16) at one end away from the cavity (12), and the inner wall of the receiving groove (16) abuts against the part of the abutment (13) on the other housing (11) that extends out of the sliding groove (14).

10. A battery mounting device for an electric bicycle according to claim 6, characterized in that: There are four card blocks (30) arranged in a rectangular shape, and two card blocks (30) correspond to one card slot (15).

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