Quick lithium battery replacement structure of electric motorcycle

Abstract

The utility model discloses a lithium battery quick replacement structure of an electric motorcycle, which is characterized in that an integrated box body is arranged on a battery mounting box to limit the mounting and protection of a lithium battery, and two lock catches are arranged as lockable puller buckles to be matched and locked with lock hooks of the lithium battery; the lithium battery can be effectively and quickly locked or replaced, the locking is firm, quicker and more convenient, the lithium battery can be quickly assembled and disassembled and conveniently assembled, the lithium battery can be transferred to other charging places to be charged, and the flexibility is sufficient; the overall structure of the bestriding electric motorcycle is reserved, and the design that the battery mounting box is partially hollowed out and the back is exposed ensures that the lithium battery has an enough exposed area, so that the rapid heat dissipation and cooling effect is achieved; and meanwhile, the whole lithium battery body is placed at the optimal position, so that the gravitational gravity of the whole vehicle is reasonable, the running operation stability and safety of the electric motorcycle are enhanced, and the performance and the original driving fun of the electric motorcycle are greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of quick-change lithium batteries, and more particularly to a quick-change lithium battery structure applicable to all CG-type electric motorcycles with gantry suspension. Background Technology

[0002] In recent years, with the rapid development of the new energy industry, traditional gasoline motorcycles have gradually shifted towards the production of more and more electric motorcycles. Using a relatively mature production platform for gasoline motorcycles to produce electric motorcycles is the most cost-effective method. This conversion involves removing the gasoline engine from the gasoline motorcycle structure and replacing it with an electric motor to achieve electric drive. Other major components such as the frame, handlebars, and pedals remain unchanged and can be shared. Regarding improvements to gasoline-converted electric motorcycles, the applicant has applied for a patent with patent number ZL2022 2 2249822.6 for a mid-drive transmission motor. This patent removes the CG engine cylinder from the original gasoline motorcycle design, installing a mid-drive transmission motor in the lower part of the original CG engine cylinder mounting space, and installing a lithium battery in the upper part.

[0003] However, there are still some problems with the space and structure for installing lithium batteries in existing electric motorcycles, especially the lithium battery installation structure of cross-mounted electric motorcycles, as follows: (1) Lithium batteries are fixed on the motorcycle frame by screws or bolts, which is very troublesome and inconvenient to install and remove. In addition, the lithium battery is usually directly connected to the motorcycle frame by the wires. The lithium battery cannot be removed and moved to other places for charging. When the lithium battery needs to be removed, all the wires need to be disconnected, which is also troublesome. Therefore, the installation and removal of lithium batteries in this way is more troublesome, and the charging site is more limited and less flexible. In addition, the lithium battery is basically installed and fixed on the motorcycle frame by the support bracket or support plate. Due to the large size and heavy weight of the lithium battery, the lithium battery is easily detached by simply relying on the support bracket. Moreover, there is no anti-theft function for the lithium battery. Thieves can easily steal the lithium battery by removing the screws, which is insufficient for the anti-theft protection of the lithium battery. (2) Existing lithium batteries are basically installed directly in the space of the original cylinder head. In order to secure the installation and prevent the lithium battery from falling off, the lithium battery is installed horizontally in the original cylinder head position. This installation method cannot achieve the three-in-one installation of the lithium battery, the original frame and the housing of the mid-mounted transmission motor, nor can it achieve the installation of three components at the same suspension point. In addition, the cylinder head parts of the original fuel motorcycle are not installed horizontally, but are installed with a slight forward tilt. The horizontal installation of the lithium battery will cause a certain change and shift in the gravity of the original vehicle, resulting in a decrease in the operation stability and safety of the electric motorcycle. (3) Since the lithium battery is installed in the original cylinder head position, in order to improve the safety of the lithium battery (without excessively increasing the weight and simplifying the structure) and protect the lithium battery, some protective plates are attached to the outer layer of the lithium battery to prevent the lithium battery from being exposed. This method will lead to the lithium battery not being able to dissipate heat in time and quickly, resulting in an unsatisfactory cooling effect and certain safety hazards. Moreover, after installing protective plates and other structures, it is even more difficult to make the lithium battery easy to remove and quickly replace. (4) The lithium battery and mid-mounted transmission motor installed at the cylinder position of the original fuel motorcycle are in an up-down position. In order to achieve a stable and compact installation structure, the lithium battery and mid-mounted transmission motor are installed very close together. When the motor transmission clutch arm and clutch cable of the mid-mounted transmission motor need to be installed, repaired and disassembled, there is no reserved space or reserved hole, which will cause inconvenience and trouble for maintenance and installation. (5) When the lithium battery is charged, when it is plugged into the charging socket, if a conventional connector or plug is used, the number of plugging and unplugging cycles exceeds 500 times, the problem of arcing will occur, which fails to ensure effective overcurrent and safety of use, and greatly reduces the service life and safety.

[0004] Therefore, improvements are needed to the existing lithium battery installation structure of electric motorcycles to solve the aforementioned problems. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a quick-change structure for lithium batteries in electric motorcycles. This quick-change structure is suitable for quick replacement of lithium batteries in all motorcycles. The structure is based on the original CG engine frame suspension point of the motorcycle, with the lithium battery and battery housing positioned in the effective space above the cylinder head of the original CG engine. Utilizing the original motorcycle frame and the centrally mounted transmission motor's suspension as a unified fixing point, the original motorcycle frame, battery housing, and centrally mounted transmission motor are fixed together at a unified suspension point. This allows for selection of different lithium battery power drive modes in conjunction with the motorcycle body, centrally mounted transmission motor, controller, and operation. This battery mounting box is an integrated unit that houses and encloses the lithium battery. It features a movable door for easy and quick battery removal, and a lock on the door provides comprehensive protection against theft. Two latches on the box act as locking mechanisms that engage with the battery's hooks, allowing for secure locking and replacement. The box offers reliable locking and easy battery replacement, enabling quick and convenient installation and removal for portable charging. The overall design of the electric motorcycle is aesthetically pleasing while ensuring easy battery replacement. The partially open design and exposed back of the battery mounting box provide sufficient surface area for rapid heat dissipation. Optimal battery placement ensures balanced weight distribution, enhancing stability and safety, and significantly improving performance and driving pleasure.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a quick-change structure for lithium batteries of electric motorcycles, including a battery mounting box that is mounted on the frame of the electric motorcycle and located above the mid-mounted transmission motor and has a movable door, and a lithium battery that is movably mounted on the battery mounting box.

[0007] The battery mounting box includes an integrated box body consisting of a front fixed box door, a left fixed box door, and a bottom fixed box door, and a movable box door that is hinged to the right side of the integrated box door and can be flipped downwards; the front fixed box door and the left fixed box door are respectively provided with a front latch opening and a left latch opening, and the front fixed box door and the left fixed box door are respectively provided with a front latch and a left latch located below the front latch opening and the left latch opening, which can be lifted upwards to expose the front latch opening and the left latch opening; the bottom of the bottom fixed box door has a protruding hanging mounting bracket.

[0008] The lithium battery includes a lithium battery casing and a lithium battery cell placed inside the lithium battery casing. The lithium battery casing is provided with a front lock hook and a left lock hook that protrude from the front lock opening and the left lock opening respectively after the lithium battery is installed in the battery mounting box and form a movable lock with the front lock and the left lock. The lithium battery casing is also provided with a charging socket and a wiring socket for connecting to the drive power line on the electric motorcycle frame.

[0009] Furthermore, the suspension mounting bracket is provided with suspension fixing holes that form a common mounting and fixing point with the electric motorcycle frame and the mid-mounted variable speed motor at three positions.

[0010] Furthermore, the front fixed door is provided with a lock fixing plate located above the lithium battery and extending inward with an inward folded edge. The right side of the movable door is provided with an inner lock hole corresponding to the lock fixing plate and an outer lock hole for installing the lock. The right outer edge of the movable door is provided with a movable door cover plate that extends outward and covers the lock fixing plate so that it is not exposed.

[0011] Furthermore, the outer side of the lithium battery casing is provided with a power display screen hole, and a power display screen is installed inside the power display screen hole.

[0012] Furthermore, a low-voltage switch port is provided on the outer side of the lithium battery casing, and a self-locking low-voltage switch is installed inside the low-voltage switch port.

[0013] Furthermore, the top of the lithium battery casing is provided with an upward handle for easy lifting of the lithium battery casing, and the right side of the lithium battery casing is provided with a push-pull handle for easy pulling out of the lithium battery casing; the push-pull handle is on the same side as one side of the movable box door.

[0014] Furthermore, the rear end of the integrated housing is provided with a raised limiting piece that protrudes upward and limits the installation position of the rear end of the lithium battery; the top of the movable door and the top of the left fixed door are both provided with an upwardly extending and inwardly inclined anti-detachment skirt.

[0015] Furthermore, the movable door is provided with a push-pull handle opening that allows the push-pull handle to protrude; the front fixed door is provided with a power display screen opening that allows the power display screen to protrude, and the front lock hook and charging socket are both exposed from the front lock opening.

[0016] Furthermore, the bottom of the fixed box door is provided with a clutch mounting strip hole for convenient installation, maintenance and disassembly of the clutch arm and clutch cable of the mid-mounted variable speed motor; the lithium battery casing includes a casing body with an open structure on one side and a casing sealing plate with a sealed opening structure.

[0017] In summary, the lithium battery quick-change structure for electric motorcycles of this utility model is suitable for quick lithium battery replacement in all motorcycles. This lithium battery quick-change structure is based on the original CG engine frame suspension point of the motorcycle as a fixed structure. The lithium battery and battery mounting box are designed to be placed in the effective space above the cylinder of the original CG engine. The original fuel motorcycle frame and the mid-mounted transmission motor are integrated into a common fixed point design, and the original fuel motorcycle frame, battery mounting box, and mid-mounted transmission motor are fixed together into a common fixed point. Different lithium battery power drive modes can be selected in conjunction with the motorcycle body, mid-mounted transmission motor, controller, and operation. This battery mounting box is an integrated unit that houses and encloses the lithium battery. It features a movable door for easy and quick battery removal, and a lock on the door provides comprehensive protection against theft. Two latches on the box act as locking mechanisms that engage with the battery's hooks, allowing for secure locking and replacement. The box offers reliable locking and easy battery replacement, enabling quick and convenient installation and removal for portable charging. The overall design of the electric motorcycle is aesthetically pleasing while ensuring easy battery replacement. The partially open design and exposed back of the battery mounting box provide sufficient surface area for rapid heat dissipation. Optimal battery placement ensures balanced weight distribution, enhancing stability and safety, and significantly improving performance and driving pleasure. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of a lithium battery quick-replacement structure for an electric motorcycle.

[0019] Figure 2 yes Figure 1 A schematic diagram of the decomposition process;

[0020] Figure 3 This is a 3D schematic diagram of the opening of the movable compartment door of a lithium battery quick-change structure for an electric motorcycle.

[0021] Figure 4 This is a three-dimensional schematic diagram of a lithium battery quick-change structure for an electric motorcycle from another perspective.

[0022] Figure 5 This is a 3D schematic diagram of the battery mounting box;

[0023] Figure 6 This is a 3D schematic diagram of the battery mounting box with its movable housing open.

[0024] Figure 7 This is a 3D schematic diagram of a lithium battery;

[0025] The labels in the attached diagram are as follows: 1. Battery mounting box; 2. Lithium battery; 3. Front fixed door; 4. Left fixed door; 5. Bottom fixed door; 6. Integrated box body; 7. Movable door; 8. Front latch opening; 9. Left latch opening; 10. Front latch; 11. Left latch; 12. Lithium battery casing; 13. Lithium battery cell; 14. Front latch hook; 15. Left latch hook; 16. Charging socket; 17. Drive power cord; 18. Wiring socket; 19. Suspension mount 20. Mounting bracket; 21. Hanging fixing hole; 22. Inner folded edge; 23. Lock fixing plate; 24. Outer lock hole; 25. Movable cabinet door cover plate; 26. Power display screen; 27. Low voltage switch port; 28. Self-locking low voltage switch; 29. ​​Top handle; 30. Push-pull handle; 31. Protruding limit piece; 32. Anti-detachment skirt; 33. Push-pull handle opening; 34. Power display screen opening; 35. Clutch installation strip hole; 36. Outer shell body; 37. Outer shell sealing plate. Detailed Implementation

[0026] Example 1

[0027] This embodiment 1 describes a quick-change structure for a lithium battery in an electric motorcycle, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the electric motorcycle includes a battery mounting box 1 with a movable door, mounted on the frame and located above the mid-mounted transmission motor, and a lithium battery 2 movably mounted on the battery mounting box. This electric motorcycle's lithium battery quick-change structure utilizes the existing motorcycle's upper cylinder structure to integrate the lithium battery, battery mounting box, and mid-mounted transmission motor, all mounted on the CG-type straddle-mounted motorcycle frame, achieving flexible use of the available space above the cylinder. The battery mounting box is fixedly mounted on the electric motorcycle frame, using the original engine frame suspension point as a fixed structure. The lithium battery is movably mounted on the battery mounting box and can be quickly removed and pulled out, making it convenient to carry. The battery mounting box and the lithium battery together form the lithium battery quick-change structure.

[0028] The battery mounting box includes an integrated box body 6 consisting of a front fixed box door 3, a left fixed box door 4, and a bottom fixed box door 5, and a movable box door 7 that is hinged to the right side of the integrated box door and can be flipped downwards; the front fixed box door and the left fixed box door are respectively provided with a front latch opening 8 and a left latch opening 9, and the front fixed box door and the left fixed box door are respectively provided with a front latch 10 and a left latch 11 located below the front latch opening and the left latch opening and can be lifted upwards to expose the positions of the front latch opening and the left latch opening; the bottom of the bottom fixed box door has a protruding hanging mounting bracket 19.

[0029] This suspension mounting bracket is used to securely install the battery mounting box onto the electric motorcycle frame. The battery mounting box features three fixed doors forming an integrated enclosure for limiting the installation of the lithium battery at its bottom and two sides, and a movable door to restrict the right side of the lithium battery, thus achieving the purpose of lithium battery installation and positioning. Two latches are provided for quick and secure locking of the lithium battery sides, ensuring reliable locking and convenient quick removal of the battery. The latches are lockable pull-code latches, allowing for the installation of mechanical locks for anti-theft purposes. Simultaneously, the overall structure of the electric motorcycle is aesthetically pleasing, while ensuring convenient and quick battery replacement, preserving the overall structural integrity of the motorcycle. Finally, only three sides of the integrated enclosure cover the lithium battery, while the back is exposed, and other sides have openings. This ensures sufficient exposed area and ventilation holes for rapid heat dissipation when the lithium battery is securely installed.

[0030] The battery mounting box features a hinged door that flips up and down, allowing the lithium battery to be easily removed from the box by flipping down one side. Meanwhile, the three fixed doors of the integrated box ensure secure installation, making the process convenient, quick, and smooth. Two latches securely hold the lithium battery in place, preventing accidental release. Flipping the latch handle upwards engages the battery, while releasing the safety catch (a familiar fastener to technicians) and flipping the handle downwards disengages the latch from the battery.

[0031] like Figure 7As shown, the lithium battery includes a lithium battery casing 12 and a lithium battery cell 13 placed inside the lithium battery casing. The lithium battery casing has front locking hooks 14 and left locking hooks 15 that protrude from the front locking opening and left locking opening respectively after the lithium battery is installed in the battery mounting box, forming a movable locking mechanism with the front and left locking latches. The lithium battery casing also has a charging socket 16 and a wiring socket 18 for connecting to the drive power cable 17 on the electric motorcycle frame. During installation, the lithium battery cell is inserted into the lithium battery casing and sealed securely. The locking hooks on the lithium battery casing and the locking latches on the battery mounting box form a movable locking mechanism, achieving the effect of locking the lithium battery. Additionally, the charging socket on the lithium battery casing can be equipped with a waterproof cover to provide good waterproofing when not charging. The wiring socket on the lithium battery casing enables power connection to the electric motorcycle frame, ensuring safe use.

[0032] In this embodiment 1, the suspension mounting bracket is provided with suspension fixing holes 20 that form a three-position common mounting and fixing point with the electric motorcycle frame and the mid-drive transmission motor. The suspension fixing holes of the suspension mounting bracket are three-in-one common suspension fixing holes corresponding to the original frame, the mid-drive transmission motor and the battery mounting box. That is, the original frame, the mid-drive transmission motor and the battery mounting box are fixed and installed at the same point through the same suspension fixing hole. There are three suspension fixing holes in total, namely one M8 hole and two M10 holes. The same suspension fixing point, together with the motorcycle frame, the mid-drive transmission motor, the controller and operation, allows for the selection of different lithium battery power drive modes. The whole structure is sturdy and aesthetically pleasing, and safe and reliable in use.

[0033] In this embodiment 1, the front fixed door is provided with a lock fixing plate 22 located above the lithium battery and extending inward with an inner folded edge 21. The right side of the movable door is provided with an outer lock hole 23 corresponding to the inner folded edge of the lock fixing plate and used to install the lock. The right outer edge of the movable door is provided with a movable door cover plate 24 that extends outward and covers the lock fixing plate so that it is not exposed. Because the movable door is a hinged door structure, after the movable door is fully opened, the insertion part of the lock in the outer lock hole will be positioned on the outside of the inner folded edge. When a key is inserted into the lock and driven to rotate, the lock plate of the insertion part of the lock will also rotate accordingly and engage with the back of the inner folded edge, thus locking the lock (this lock is a well-known lock structure in the industry). Finally, the movable door cover acts like a edging, covering the gap between the lock fixing plate and the front fixed door after the movable door is fully opened.

[0034] In this embodiment 1, a power display hole (not shown in the figure) is provided on the outer side of the lithium battery casing, and a power display screen 25 is installed in the power display hole. The power display hole and the power display screen designed on the front left of the lithium battery casing can guide the driver to intuitively see the battery charging and discharging status and charging and discharging amount, etc., to ensure driving range.

[0035] In this embodiment 1, a low-voltage switch port 26 is also provided on the outer side of the lithium battery casing, and a self-locking low-voltage switch 27 is installed inside the low-voltage switch port. The low-voltage switch port is equipped with a self-locking low-voltage switch with a diameter of 19mm. The self-locking low-voltage switch is turned off before plugging in and turned on when plugging in, which effectively solves the problem of arc damage to the electrode when plugging in the wiring socket, ensuring service life and safety.

[0036] In this embodiment 1, the top of the lithium battery casing is provided with an upper handle 28 for easy upward lifting of the lithium battery casing, and the right side of the lithium battery casing is provided with a push-pull handle 29 for easy outward pulling of the lithium battery casing; the push-pull handle is on the same side as the movable box door. When the lithium battery is removed from the electric motorcycle frame, the entire lithium battery can be lifted by the upper handle for easy carrying; while the push-pull handle can be used to easily pull the lithium battery out of the electric motorcycle frame and to easily push the lithium battery into the battery mounting box.

[0037] In this embodiment 1, the rear end of the integrated housing is provided with a raised limiting piece 30 that protrudes upward and limits the installation position of the rear end of the lithium battery; the top of the movable door and the top of the left fixed door are both provided with an upwardly extending and inwardly inclined anti-detachment skirt 31. Since the rear end of the integrated housing does not have a corresponding door, and the rear end of the integrated housing corresponds to the installation space of the lithium battery quick-change structure and the corresponding installation of the lithium battery and the wiring socket, a door is not required; the raised limiting piece can limit the rear end of the battery installation box, ensuring that there are limiting points on all four sides after the lithium battery is installed in the battery installation box; while the anti-detachment skirt is to prevent the lithium battery from swaying up and down on bumpy roads and colliding with the motorcycle frame when the locking hook and latch of the lithium battery loosen and open, thus protecting the motorcycle frame and the lithium battery.

[0038] In this embodiment 1, the movable door is provided with a push-pull handle opening 32 that allows the push-pull handle to be exposed; the front fixed door is provided with a power display screen opening 33 that allows the power display screen to be exposed, and the front lock hook and charging socket are both exposed from the front lock opening.

[0039] In this embodiment 1, the bottom of the fixed housing door is provided with a clutch mounting slot 34 for convenient installation, maintenance, and disassembly of the clutch arm and clutch cable of the mid-mounted variable speed motor. While ensuring the strength of the fixed housing door, this clutch mounting slot facilitates the installation, maintenance, and disassembly of the motor's variable speed clutch arm and clutch cable. The lithium battery casing includes a casing body 35 with an open side and a casing sealing plate 36 with a sealed opening. The front and rear ends of the main body of the outer casing are inwardly inclined surfaces. Lithium battery cells can be installed through the opening structure of this main body, and the lithium battery casing is sealed by the casing cover after installation. The front and rear ends of the main body and the front fixed door are not straight planes, but are designed with a certain degree of inclination. This design is based on the fact that the components in the original cylinder position are also installed at an inclination, so that when the lithium battery and battery mounting box are installed in the cylinder position, they are also slightly tilted forward and downward, optimizing the overall placement of the lithium battery and battery mounting box. This rational design of the installation position and center of gravity of the lithium battery and battery mounting box ensures a reasonable gravity for the original vehicle, guaranteeing the stability and safety of the electric motorcycle's operation, and greatly improving the performance and original driving pleasure of the electric motorcycle. Furthermore, the shape of this lithium battery casing is not a traditional square shape; combined with its installation on the motorcycle, it creates a streamlined and aesthetically pleasing overall structure, significantly enhancing the overall design.

[0040] In this embodiment 1, a 10mm thick layer of waterproof adhesive is applied to the fastening point between the outer casing and the outer casing body. After the outer casing and the outer casing body are installed in place, the 10mm thick layer of adhesive creates a seal, ensuring the overall structure is securely installed, achieving an IP67 waterproof rating and effective heat dissipation.

[0041] In this embodiment 1, the current of the wiring socket is 80A to 150A. The equipped 80A to 150A wiring socket has a plugging capacity of more than 5000 times, eliminating the problem of polarity damage that conventional connectors suffer after 500 times. In addition, the wiring socket uses 4 to 6 AWG positive and negative wires to ensure effective overcurrent and safe use.

[0042] In this embodiment 1, the inner side of the lithium battery casing is further provided with a fixing plate for clamping and fixing the lithium battery cells. The fixing plate inside the lithium battery casing clamps and fixes the lithium battery cells, ensuring that the lithium battery cells remain fixed even when the electric motorcycle is moving bumpy, while also ensuring the safety of the lithium battery cells and electrode welding. The outer side of the lithium battery cells is provided with a protective pressure plate for pressing and fixing each cell block. The protective pressure plate serves two purposes: first, to fix each cell block; and second, to fix the fixing plate, ensuring the integrity of the overall lithium battery structure.

[0043] The lithium battery quick-change structure of this electric motorcycle is suitable for quick replacement of lithium batteries in all motorcycles. This lithium battery quick-change structure is based on the original CG engine frame suspension point of the motorcycle. The lithium battery and battery installation box are designed to be placed in the effective space above the cylinder of the original CG engine. The original fuel motorcycle frame and the mid-mounted transmission motor are used as a three-in-one common fixing point design to fix the original fuel motorcycle frame, battery installation box and mid-mounted transmission motor into a three-in-one common suspension point. Different lithium battery power drive modes can be selected in conjunction with the motorcycle body, mid-mounted transmission motor, controller and operation. This battery mounting box is an integrated unit that houses and encloses the lithium battery. It features a movable door for easy and quick battery removal, and a lock on the door provides comprehensive protection against theft. Two latches on the box act as locking mechanisms that engage with the battery's hooks, allowing for secure locking and replacement. The box offers reliable locking and easy battery replacement, enabling quick and convenient installation and removal for portable charging. The overall design of the electric motorcycle is aesthetically pleasing while ensuring easy battery replacement. The partially open design and exposed back of the battery mounting box provide sufficient surface area for rapid heat dissipation. Optimal battery placement ensures balanced weight distribution, enhancing stability and safety, and significantly improving performance and driving pleasure.

[0044] The beneficial effects of this embodiment 1 are as follows: Based on the motorcycle national catalog announcement of the straddle motorcycle model, the engine suspension structure of the so-called straddle motorcycle is designed to accommodate the electric quick-change lithium battery by utilizing the space above the cylinder block. This effectively utilizes space and provides power. The lithium battery is centrally located, stable and safe, and also reduces costs, simplifies the installation structure, is convenient, reliable and practical, firmly installed, and aesthetically pleasing.

[0045] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the structure of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A quick-change structure for a lithium battery in an electric motorcycle, characterized in that, Includes a battery mounting box (1) that is mounted on the frame of an electric motorcycle and located above the mid-mounted transmission motor and has a movable door, and a lithium battery (2) that is movably mounted on the battery mounting box; The battery mounting box includes an integrated box body (6) consisting of a front fixed box door (3), a left fixed box door (4), and a bottom fixed box door (5), and a movable box door (7) that is hinged to the right side of the integrated box door and can be flipped downwards; the front fixed box door and the left fixed box door are respectively provided with a front latch opening (8) and a left latch opening (9), and the front fixed box door and the left fixed box door are respectively provided with a front latch (10) and a left latch (11) located below the front latch opening and the left latch opening and can be lifted upwards to expose the front latch opening and the left latch opening; the bottom of the bottom fixed box door has a protruding hanging mounting bracket (19); The lithium battery includes a lithium battery casing (12) and a lithium battery cell (13) placed inside the lithium battery casing. The lithium battery casing is provided with a front lock hook (14) and a left lock hook (15) that protrude from the front lock opening and the left lock opening respectively after the lithium battery is installed in the battery mounting box and form a movable lock with the front lock and the left lock. The lithium battery casing is also provided with a charging socket (16) and a wiring socket (18) that connects to the drive power line (17) on the electric motorcycle frame.

2. The lithium battery quick-change structure for an electric motorcycle according to claim 1, characterized in that, The suspension mounting bracket is provided with suspension fixing holes (20) that form a common mounting and fixing point with the electric motorcycle frame and the mid-mounted variable speed motor.

3. The lithium battery quick-change structure for an electric motorcycle according to claim 2, characterized in that, The front fixed door is provided with a lock fixing plate (22) located above the lithium battery and stamped outward with an inward folded edge (21). The right side of the movable door is provided with an inner lock hole corresponding to the lock fixing plate and an outer lock hole (23) for installing the lock. The right outer edge of the movable door is provided with a movable door cover plate (24) that extends outward and covers the lock fixing plate so that it is not exposed.

4. The lithium battery quick-change structure for an electric motorcycle according to claim 3, characterized in that, The lithium battery casing has a power display hole on its outer side, and a power display screen (25) is installed inside the power display hole.

5. The lithium battery quick-change structure for an electric motorcycle according to claim 4, characterized in that, The lithium battery casing is also provided with a low-voltage switch port (26) on the outside, and a self-locking low-voltage switch (27) is installed in the low-voltage switch port.

6. The lithium battery quick-change structure for an electric motorcycle according to claim 5, characterized in that, The top of the lithium battery casing is provided with an upper handle (28) for easy lifting of the lithium battery casing upwards, and the right side of the lithium battery casing is provided with a push-pull handle (29) for easy pulling out of the lithium battery casing; the push-pull handle is on the same side as one side of the movable box door.

7. The lithium battery quick-change structure for an electric motorcycle according to claim 6, characterized in that, The integrated box body has a raised limiting piece (30) at the rear end that protrudes upward and limits the installation position of the rear end of the lithium battery; the top of the movable box door and the top of the left fixed box door are both provided with an upwardly extending and inwardly inclined anti-detachment skirt (31).

8. The lithium battery quick-change structure for an electric motorcycle according to claim 7, characterized in that, The movable door is provided with a push-pull handle opening (32) that allows the push-pull handle to be exposed; the front fixed door is provided with a power display screen opening (33) that allows the power display screen to be exposed, and the front lock hook and charging socket are both exposed from the front lock opening.

9. The lithium battery quick-change structure for an electric motorcycle according to claim 8, characterized in that, The bottom of the fixed box door is provided with a clutch mounting strip hole (34) for easy installation, maintenance and disassembly of the clutch arm and clutch cable of the mid-mounted variable speed motor; the lithium battery casing includes a casing body (35) with an open structure on one side and a casing sealing plate (36) with a sealed opening structure.

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