Lithium battery pack of electric moped

Abstract

The utility model discloses a lithium battery pack of an electric moped, which relates to the technical field of lithium batteries and comprises a battery shell, a box cover is movably connected to the top of the battery shell, a buckle is fixedly mounted on one side, close to the battery shell, of the box cover, insulating sleeves are fixedly mounted on two sides of the battery shell, and locking rods are arranged on the inner sides of the insulating sleeves. Springs are arranged on the outer sides of the locking rods and located in the insulating sleeves, and the locking rods and the buckles are matched with each other and correspond to each other in a one-to-one mode. According to the lithium battery pack of the electric moped provided by the utility model, the lock rod is pushed to protrude out of the insulating sleeve through the spring which is positioned in the insulating sleeve and is in a stretching state and is inserted into the hole in the buckle, so that the box cover is fixedly clamped at the top of the battery shell, and the battery shell and the box cover can be assembled and disassembled without screwing off a screw; therefore, damage to the box cover in the assembling and disassembling process is avoided, and the overall waterproof sealing performance of the battery pack is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a lithium battery pack for electric bicycles. Background Technology

[0002] An electric-assisted bicycle is a type of bicycle that uses an electric motor to assist human riding. It is typically equipped with a battery-powered electric motor that provides additional power when the rider pedals, and is electrically driven by the bicycle's battery during riding.

[0003] Electric bicycle batteries are typically battery packs composed of multiple lithium batteries. Chinese patent CN221614028U discloses a lithium battery pack and an electric bicycle incorporating it. By designing lithium battery cells differently from traditional methods to fit existing lead-acid battery casings, it can directly replace the lead-acid batteries currently used in electric bicycles, reducing modification and replacement costs.

[0004] Lithium-ion batteries are the core component of lithium battery packs for electric bicycles. They are usually arranged in groups and encapsulated in a housing. To facilitate maintenance of the housing, there is usually a removable cover on the top of the housing. However, the cover of existing lithium battery packs is usually fixed to the housing with screws. When installing or removing the battery, tools are needed to unscrew the screws on the cover before the internal lithium battery can be replaced. If too much force or improper force is used when unscrewing the screws, the housing can be easily damaged, affecting the overall waterproof sealing of the battery pack. Utility Model Content

[0005] In view of the problem that the existing battery packs are prone to damage to the outer shell and affect the overall waterproof sealing when the screws on the cover are unscrewed with excessive or improper force, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a lithium battery pack for electric bicycles, which aims to fix the cover on the battery housing by using a spring to push the locking rod, which is limited by the insulating sleeve, to the buckle on the cover to complete the insertion and fixing. This allows the battery housing and cover to be installed and removed without unscrewing the screws.

[0007] To solve the above technical problems, this utility model provides the following technical solution: a lithium battery pack for electric bicycles, which includes a battery housing, a cover movably connected to the top of the battery housing, and a buckle fixedly installed on the side of the cover near the battery housing, the buckles being symmetrically distributed on both sides of the cover;

[0008] Insulating sleeves are fixedly installed on both sides of the battery casing. A locking rod is provided on the inner side of the insulating sleeve. One end of the locking rod protrudes from the insulating sleeve. A spring is provided on the outer side of the locking rod, and the spring is located in the insulating sleeve. The locking rod is movably connected to the insulating sleeve through the spring.

[0009] The locking rod and the buckle are compatible with each other and correspond one-to-one.

[0010] As a preferred embodiment of the lithium battery pack for electric bicycles according to this utility model, the locking rod has a pull hole at one end protruding from the battery housing, a slot is provided on the outer side of the locking rod, and a pressure rod is movably connected to the inner side of the slot.

[0011] In a preferred embodiment of the lithium battery pack for electric bicycles according to this utility model, a slider is fixedly installed on the top of the pressure rod, the slider is movably connected in the battery housing, the slider is threadedly connected to the battery housing through a threaded shaft, the included angle between the pressure rod and the locking rod is ninety degrees, and the threaded shaft is arranged parallel to the locking rod.

[0012] As a preferred embodiment of the lithium battery pack for electric bicycles according to this utility model, a battery pack sleeve is provided on the inner side of the battery housing, and lithium battery cells are installed at equal intervals on the battery housing through the battery pack sleeve. A handle is fixedly installed on the side of the battery pack sleeve near the cover.

[0013] As a preferred embodiment of the lithium battery pack for electric bicycles described in this utility model, the inner side of the cover is further provided with a conductive shaft corresponding to each lithium battery cell. The end of the conductive shaft near the lithium battery cell is threaded with a cell contact. The cell contact is movably connected to the top of the conductive shaft, and the cell contact is compatible with the lithium battery cell.

[0014] As a preferred embodiment of the lithium battery pack for electric bicycles according to this utility model, the cover is provided with a cover plate on the side of the box cover away from the battery shell, the cover plate is fixedly installed on the top of the box cover by bolts, and an electrode plate is fixedly installed on the side of the cover plate near the conductive shaft, and electrode contacts are provided at both ends of the electrode plate.

[0015] In a preferred embodiment of the lithium battery pack for electric bicycles according to this utility model, the outer side of the electrode sheet is electrically connected to a series plate, and the end of the conductive shaft away from the cell contact is located in the series plate. The conductive shaft is electrically connected to the electrode sheet through the series plate.

[0016] The beneficial effects of this utility model are:

[0017] 1. The spring, which is extended in the insulating sleeve, pushes the locking rod out of the insulating sleeve and inserts it into the hole in the buckle. This allows the cover to be fixedly snapped onto the top of the battery casing. The battery casing and cover can be installed and removed without unscrewing the screws, thus avoiding damage to the cover during installation and removal and ensuring the overall waterproof and airtightness of the battery pack.

[0018] 2. By rotating the threaded shaft parallel to the locking rod, the threaded slider moves closer to the insulating sleeve in the battery housing. The pressure rod slides in the locking rod through the slot, so that the length of the locking rod protruding from the insulating sleeve reaches the maximum value and cannot move in the insulating sleeve. This ensures the stability of the battery pack after the precise docking is completed.

[0019] 3. By rotating the conductive shaft, the cell contacts threaded to the conductive shaft move up and down within the cover, thereby docking with the lithium battery cell. This allows the power in the conductive shaft to be conducted outwards, and works with the battery pack to fix the individual lithium battery cells in the battery casing, thus preventing the lithium battery cells from becoming loose or shifting.

[0020] 4. By connecting multiple independent lithium battery cells in series with a series plate at the other end of the conductive shaft, the power transmitted by the lithium battery cells through the conductive shaft is transmitted to the electrode contacts through the electrode plates after passing through the series plate, thereby enabling multiple independent lithium battery cells to jointly power the electric bicycle. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0022] Figure 1 This is a schematic diagram of the overall structure of the lithium battery pack for the electric bicycle of this utility model.

[0023] Figure 2 This is an exploded structural diagram of the lithium battery pack for the electric bicycle of this utility model.

[0024] Figure 3 This is a schematic diagram of the cover and buckle structure of the lithium battery pack for electric bicycles according to this utility model.

[0025] Figure 4 This is an exploded view of the slider and locking rod of the lithium battery pack for the electric bicycle of this utility model.

[0026] Figure 5This is a schematic diagram of the locking rod structure of the lithium battery pack for the electric bicycle of this utility model.

[0027] Figure 6 This is a schematic diagram of the conductive metal sheet and cell contacts of the lithium battery pack for electric bicycles according to this utility model.

[0028] Figure 7 This is a schematic diagram of the cover plate and conductive metal sheet structure of the lithium battery pack for the electric bicycle of this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Battery casing; 2. Cover; 3. Buckle; 4. Insulating sleeve; 5. Locking rod; 6. Spring; 7. Pull hole; 8. Slot; 9. Pressure rod; 10. Slider; 11. Threaded shaft; 12. Battery pack; 13. Lithium cell; 14. Handle; 15. Conductive shaft; 16. Cell contact; 17. Cover plate; 18. Bolt; 19. Electrode plate; 20. Electrode contact; 21. Series plate. Detailed Implementation

[0031] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example 1

[0032] Reference Figure 1-7 This is the first embodiment of the present invention, providing a lithium battery pack for an electric bicycle. The lithium battery pack includes a battery housing 1, with a cover 2 movably connected to the top of the battery housing 1. A buckle 3 is fixedly installed on the side of the cover 2 near the battery housing 1, with the buckles 3 symmetrically distributed on both sides of the cover 2. Insulating sleeves 4 are fixedly installed on both sides of the battery housing 1. A locking rod 5 is provided inside the insulating sleeve 4, with one end of the locking rod 5 protruding from the insulating sleeve 4. A spring 6 is provided on the outside of the locking rod 5, and the spring 6 is located within the insulating sleeve 4. The locking rod 5 is movably connected to the insulating sleeve 4 via the spring 6. In the insulating sleeve 4, the locking rod 5 and the buckle 3 are compatible with each other and correspond one-to-one. The cover 2 can be snapped onto the top of the battery housing 1, so that the semi-open battery housing 1 forms a closed structure. The insulating sleeve 4 can limit the angle of movement of the locking rod 5 to avoid angle deviation. When the spring 6 is in the extended state, it can push the locking rod 5 out of the insulating sleeve 4 and complete the insertion with the hole in the buckle 3, so that the cover 2 is fixedly snapped onto the top of the battery housing 1. The battery housing 1 and the cover 2 can be installed and removed without unscrewing the screws, thus avoiding damage to the cover 2 during the installation and removal process.

[0033] A pull hole 7 is provided at one end of the locking rod 5 that protrudes from the battery housing 1. A slot 8 is provided on the outer side of the locking rod 5. A pressure rod 9 is movably connected to the inner side of the slot 8. When the locking rod 5 and the buckle 3 are fully engaged, the pull hole 7 is also located on the outer side of the battery housing 1, which facilitates manual insertion and removal of the locking rod 5. The pressure rod 9 can slide in the locking rod 5 through the slot 8, thereby limiting the length of the locking rod 5 protruding from the insulating sleeve 4, making the position of the locking rod 5 in the insulating sleeve 4 inconvenient when it is fully engaged with the buckle 3.

[0034] A slider 10 is fixedly installed on the top of the pressure rod 9. The slider 10 is movably connected in the battery housing 1. The slider 10 is threaded to the battery housing 1 through a threaded shaft 11. The included angle between the pressure rod 9 and the locking rod 5 is 90 degrees. The threaded shaft 11 is set parallel to the locking rod 5. The inner side of the slider 10 is provided with a thread that is compatible with the threaded shaft 11. When the distance between the slider 10 and the insulating sleeve 4 is at its minimum value, the length of the locking rod 5 protruding from the insulating sleeve 4 is at its maximum value.

[0035] A battery pack 12 is provided on the inner side of the battery housing 1, and lithium battery cells 13 are installed in the battery housing 1 through the battery pack 12. A handle 14 is fixedly installed on the side of the battery pack 12 near the cover 2. The battery pack 12 is snapped into the battery housing 1, and has holes inside that are compatible with the lithium battery cells 13. The lithium battery cells 13 are cylindrical batteries and are separated from each other by the battery pack 12. The handle 14 facilitates the lifting and unloading of the battery pack 12 in the battery housing 1.

[0036] The inner side of the cover 2 is also provided with conductive shafts 15 corresponding to the lithium battery cells 13. The end of the conductive shaft 15 near the lithium battery cell 13 is threaded with a cell contact 16. The cell contact 16 is movably connected to the top of the conductive shaft 15. The cell contact 16 and the lithium battery cell 13 are mutually compatible. The end of the conductive shaft 15 near the cell contact 16 is provided with a thread that is compatible with the cell contact 16. The conductive shaft 15 can rotate under the restriction of the cover 2, so that the cell contact 16 can move up and down in the cover 2, thereby completing the docking with the lithium battery cell 13, so that the power in the conductive shaft 15 can be conducted outward.

[0037] A cover plate 17 is provided on the side of the cover 2 away from the battery casing 1. The cover plate 17 is fixedly installed on the top of the cover 2 by bolts 18. An electrode plate 19 is fixedly installed on the side of the cover plate 17 near the conductive shaft 15. Electrode contacts 20 are provided at both ends of the electrode plate 19. The cover plate 17 is fixed to the top of the cover 2 by bolts 18, so that the conductive shaft 15 exposed on the top of the cover 2 is covered, thereby avoiding accidental contact and leakage, ensuring the airtightness and safety of the battery pack. The electrode contacts 20 are the negative and positive electrodes, respectively, which can be connected to the electric bicycle circuit through wires to supply power to the electric bicycle motor.

[0038] The outer side of the electrode plate 19 is electrically connected to a series plate 21. The end of the conductive shaft 15 away from the cell contact 16 is located in the series plate 21. The conductive shaft 15 is electrically connected to the electrode plate 19 through the series plate 21. The conductive shaft 15 can connect the power in the lithium cell 13 connected to the cell contact 16 through the series plate 21. The series plate 21 can transmit the power transmitted by the conductive shaft 15 to the electrode contact 20 through the electrode plate 19, so that multiple independent lithium cells 13 can supply power to the electric bicycle together.

[0039] During assembly, the cover 2 is snapped onto the top of the semi-open battery housing 1, completely locking the cover 2 to the battery housing 1 and forming a closed structure. Simultaneously, the insulating sleeve 4 restricts the movement angle of the locking rod 5, preventing angular deviation. The spring 6, extended within the insulating sleeve 4, pushes the locking rod 5 out of the sleeve 4, engaging with the hole in the buckle 3. This securely fastens the cover 2 to the top of the battery housing 1, allowing for easy assembly and disassembly of the battery housing 1 and cover 2 without unscrewing screws, thus preventing damage to the cover 2 during assembly and disassembly and ensuring the overall waterproof seal of the battery pack. Furthermore, rotating the threaded shaft 11, parallel to the locking rod 5, moves the threaded slider 10 within the battery housing 1 closer to the insulating sleeve 4. The pressure rod 9 slides through the slot 8 within the locking rod 5, and when the distance between the slider 10 and the insulating sleeve 4 reaches its minimum, the length of the locking rod 5 protruding from the insulating sleeve 4 reaches its maximum. The large value, and cannot be moved in the insulating sleeve 4, during loading and unloading, after releasing the restriction of the pressure rod 9 on the locking rod 5, the locking rod 5 can be pulled out from the buckle 3 through the pull hole 7 located on the outside of the battery housing 1. This ensures the stability of the battery pack after precise docking while completing the docking. Under the restriction of the cover 2, the conductive shaft 15 is rotated to make the cell contact 16 threaded to the conductive shaft 15 rise and fall in the cover 2, thereby docking with the lithium cell 13. This allows the power in the conductive shaft 15 to be conducted outward, and works with the battery pack sleeve 12 to fix the individual lithium cell 13 in the battery housing 1, thereby preventing the lithium cell 13 from loosening and shifting. The series plate 21 set at the other end of the conductive shaft 15 realizes the series connection between multiple independent lithium cells 13. This allows the power transmitted by the lithium cell 13 through the conductive shaft 15 to be transmitted to the electrode contact 20 through the electrode plate 19 after passing through the series plate 21, so that multiple independent lithium cells 13 can supply power to the electric bicycle.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A lithium battery pack for an electric bicycle, comprising a battery casing (1), characterized in that: The top of the battery housing (1) is movably connected to a cover (2), and a buckle (3) is fixedly installed on the side of the cover (2) near the battery housing (1). The buckles (3) are symmetrically distributed on both sides of the cover (2). Insulating sleeves (4) are fixedly installed on both sides of the battery casing (1). A locking rod (5) is provided on the inner side of the insulating sleeve (4). One end of the locking rod (5) protrudes from the insulating sleeve (4). A spring (6) is provided on the outer side of the locking rod (5), and the spring (6) is located in the insulating sleeve (4). The locking rod (5) is movably connected to the insulating sleeve (4) through the spring (6). The locking rod (5) and the buckle (3) are compatible with each other and correspond one-to-one.

2. The lithium battery pack for an electric bicycle according to claim 1, characterized in that: The locking rod (5) has a pull hole (7) at one end protruding from the battery housing (1), and a slot (8) is provided on the outer side of the locking rod (5). A pressure rod (9) is movably connected to the inner side of the slot (8).

3. The lithium battery pack for an electric bicycle according to claim 2, characterized in that: A slider (10) is fixedly installed on the top of the pressure rod (9). The slider (10) is movably connected in the battery housing (1). The slider (10) is threadedly connected to the battery housing (1) through a threaded shaft (11). The included angle between the pressure rod (9) and the locking rod (5) is ninety degrees. The threaded shaft (11) is parallel to the locking rod (5).

4. The lithium battery pack for an electric bicycle according to claim 3, characterized in that: The battery housing (1) is provided with a battery pack sleeve (12) on its inner side, and the battery housing (1) is provided with lithium battery cells (13) arranged at equal intervals through the battery pack sleeve (12). A handle (14) is fixedly installed on the side of the battery pack sleeve (12) near the cover (2).

5. A lithium battery pack for an electric bicycle according to claim 4, characterized in that: The inner side of the cover (2) is also provided with a conductive shaft (15) corresponding to the lithium battery cell (13). The end of the conductive shaft (15) near the lithium battery cell (13) is threaded with a battery cell contact (16). The battery cell contact (16) is movably connected to the top of the conductive shaft (15). The battery cell contact (16) and the lithium battery cell (13) are mutually compatible.

6. A lithium battery pack for an electric bicycle according to claim 5, characterized in that: The cover (2) is provided with a cover plate (17) on the side away from the battery housing (1). The cover plate (17) is fixedly installed on the top of the cover (2) by bolts (18). An electrode plate (19) is fixedly installed on the side of the cover plate (17) near the conductive shaft (15). Electrode contacts (20) are provided at both ends of the electrode plate (19).

7. A lithium battery pack for an electric bicycle according to claim 6, characterized in that: The outer side of the electrode sheet (19) is electrically connected to a series plate (21), and the end of the conductive shaft (15) away from the battery cell contact (16) is located in the series plate (21). The conductive shaft (15) is electrically connected to the electrode sheet (19) through the series plate (21).

Images