Power-assisted bicycle battery structure
By setting a central support and support block in the battery structure and combining them with bolt connections, a multi-layer protection is formed, which solves the problems of battery deformation and short circuit under external pressure, and achieves high compression resistance and safety.
Patent Information
- Application Number
- CN202423150641.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-19
AI Technical Summary
Existing battery structures are prone to deformation when subjected to external pressure, leading to battery misalignment and short circuits, which pose safety hazards.
The aluminum barrel is equipped with a central support and support block structure. The support block, base plate, front support and rear support are connected by bolts to form a multi-layer protection, which avoids direct contact between the battery cell and the aluminum barrel and enhances the overall structural stability and compression resistance.
The battery structure has been improved to withstand compression, meeting European standards, preventing battery deformation and short circuits, and ensuring safety.
Smart Images
Figure CN223502092U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric bicycle battery technology, and in particular to a battery structure for a power-assisted bicycle. Background Technology
[0002] The existing battery structure is composed of several cylindrical cells connected in series and parallel. When subjected to external pressure, the outer shell is prone to deformation, which can cause misalignment between the cells and directly squeeze the cells, resulting in damage or short circuits and thus posing a safety hazard. Utility Model Content
[0003] This invention proposes a power-assisted bicycle battery structure with compressive strength that meets European standards, thus solving existing problems.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a battery structure for a power-assisted bicycle, comprising an aluminum barrel and a battery cell assembly composed of several battery cells. A through-hole groove is formed inside the aluminum barrel, and a central support is disposed within the groove located in the middle of the aluminum barrel. The central support includes a base plate, with main battery cell slots accommodating the ends of the battery cell assembly disposed on both sides of the base plate. A first support block is disposed within the base plate, extending downwards through the base plate. One end of the first support block is located outside the base plate and abuts against the inner wall of the aluminum barrel, and the other end of the first support block is also located outside the base plate and abuts against the inner wall of the aluminum barrel. Second support blocks are disposed on both sides of the first support block, and the second support blocks are located on the base plate. One end of the battery cell extends from the substrate and abuts against the inner wall of the aluminum barrel, while the other end is located inside the substrate and is fixedly connected to the first support block by screws. The battery cell groups located on both sides of the substrate with their ends located in the main battery cell slots are the main battery cell groups, and the remaining battery cell groups are the sub-battery cell groups. The two ends of the sub-battery cell groups are respectively connected to mutually cooperating front brackets and rear brackets. The front brackets and rear brackets are respectively provided with front battery cell slots and rear battery cell slots to accommodate the ends of the battery cells. The front brackets and rear brackets are respectively provided with mutually cooperating protrusions and grooves. The main battery cell groups and adjacent sub-battery cell groups are connected through the front brackets and rear brackets. The substrate, front brackets, rear brackets, and first support block are fixedly connected by bolts and nuts.
[0005] The front or rear support is provided with a connecting piece that connects the same electrode of the battery cell in the battery cell assembly.
[0006] Through holes are provided in the middle of the substrate, the middle of the front bracket, the middle of the rear bracket, and the middle of the first support block, and bolts are located in the through holes.
[0007] The main cell slot is divided into several main grooves that accommodate individual cells, and the number of main grooves is the same as the number of cells in the main cell group; the front cell slot is divided into several front grooves that accommodate individual cells, and the number of front grooves is the same as the number of cells in the sub-cell group; the rear cell slot is divided into several rear grooves that accommodate individual cells, and the number of rear grooves is the same as the number of cells in the sub-cell group.
[0008] The beneficial effects of this utility model are as follows: by setting a first support block and a second support block inside the aluminum barrel to support the aluminum barrel, the strong extrusion force of the extrusion test is withstood, ensuring the stability of the overall structure. In addition, the battery cell does not directly contact the aluminum barrel, and the aluminum barrel itself has a certain strength. Even if the aluminum barrel is deformed, the space between the battery cell and the aluminum barrel can also act as a buffer to prevent the aluminum barrel from contacting and extruding the battery cell. The battery cell groups are connected by a front bracket and a rear bracket, and the base plate, the first support block, the front bracket and the rear bracket are connected and fixed together by bolts, which also increases the overall strength. Attached Figure Description
[0009] Figure 1 This is an exploded view of the structure of this utility model.
[0010] Figure 2 for Figure 1 Exploded view of the middle section of the structure.
[0011] Figure 3 for Figure 1 A 3D view of the front brace.
[0012] Figure 4 for Figure 1 A 3D view of the mid-rear support.
[0013] Figure 5 for Figure 1 A three-dimensional view of the central support structure.
[0014] Figure 6 for Figure 5 Another perspective of the 3D view.
[0015] Figure 7 for Figure 1 Cross-sectional view of the central support, the first support block, and the second support block.
[0016] The following are the labels in the diagram: 1. Aluminum barrel; 2. Battery cell; 3. Empty slot; 4. Central support; 5. Base plate; 6. First support block; 7. Second support block; 8. Screw; 9. Main battery cell assembly; 10. Sub-battery cell assembly; 11. Front support; 12. Rear support; 13. Protrusion; 14. Groove; 15. Bolt; 16. Nut; 17. Main groove; 18. Front groove; 19. Rear groove; 20. Connecting piece; 21. Through hole. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0018] like Figures 1-7As shown, a battery structure for a power-assisted bicycle includes a battery cell assembly consisting of an aluminum barrel 1 and several battery cells 2. The aluminum barrel 1 has a through-hole groove 3 inside, and a central support 4 is installed within the groove 3 located in the middle of the aluminum barrel 1. Figure 5 , Figure 6 , Figure 7 As shown, the central support includes a base plate 5. Main cell slots for accommodating the ends of the cell assembly are respectively provided on both sides of the base plate 5. A first support block 6 is provided inside the base plate 5, extending downwards through the base plate 5. One end of the first support block 6 is located outside the base plate 5 and abuts against the inner wall of the aluminum barrel 1. The other end of the first support block 6 is also located outside the base plate 5 and abuts against the inner wall of the aluminum barrel 1. Second support blocks 7 are respectively provided on both sides of the first support block 6. The second support blocks 7 are located inside the base plate 5, with one end extending out of the base plate 5 and abutting against the inner wall of the aluminum barrel, and the other end located inside the base plate 5 and fixedly connected to the first support block 6 by screws 8. In actual production, multiple second support blocks 7 can be used, such as... Figure 2 As shown, the battery cell groups located on both sides of the substrate 5 with their ends located within the main battery cell slots are the main battery cell groups 9, and the remaining battery cell groups are the sub-battery cell groups 10. The two ends of each sub-battery cell group 10 are respectively connected to a front support 11 and a rear support 12 that cooperate with each other, as shown in the diagram. Figure 3 , Figure 4 As shown, the front bracket 11 and the rear bracket 12 are respectively provided with front cell slots and rear cell slots to accommodate the ends of the battery cells. The front bracket 11 and the rear bracket 12 are respectively provided with mutually cooperating protrusions 13 and grooves 14. In actual production, the following three methods can be adopted: First, the front bracket 11 is provided with protrusions 13 and the rear bracket 12 with grooves 14; second, the front bracket 11 is provided with grooves 14 and the rear bracket 12 is provided with protrusions 13; third, the front bracket 11 is provided with both protrusions 13 and grooves 14, and the rear bracket 12 is also provided with both protrusions 13 and grooves 14. As long as the front bracket 11 and the rear bracket 12 are fixedly connected through the protrusions 13 and grooves 14, it is acceptable. The main battery cell group 9 and the adjacent sub-battery cell group 10 are connected through the front bracket 11 and the rear bracket 12. The substrate 5, the front bracket 11, the rear bracket 12, and the first support block 6 are fixedly connected through bolts 15 and nuts 16.
[0019] To connect all the battery cells 2 in series and parallel, the front bracket 11 or the rear bracket 12 is provided with connecting pieces 20 that connect to the same electrode of the battery cells 2 in the battery cell group. The connecting pieces 20 are fixed to the outer side of the front bracket 11 or the rear bracket 12. By connecting all the connecting pieces 20 in this way, the series and parallel connection of the battery cells 2 can be achieved.
[0020] In order to improve the compressive strength of the main battery cell group 9 and the sub-battery cell group 10, through holes 21 are respectively provided in the middle of the substrate 5, the middle of the front support 11, the middle of the rear support 12 and the middle of the first support block 6, and the bolts 15 are located in the through holes 21.
[0021] To ensure buffering between cells 2 and prevent short circuits, the main cell slot is divided into several main grooves 17 that accommodate individual cells 2, and the number of main grooves 17 is the same as the number of cells 2 in the main cell group 9; the front cell slot is divided into several front grooves 18 that accommodate individual cells 2, and the number of front grooves 18 is the same as the number of cells 2 in the sub-cell group 10; the rear cell slot is divided into several rear grooves 19 that accommodate individual cells 2, and the number of rear grooves 19 is the same as the number of cells 2 in the sub-cell group 10. The number of cells 2 in the main cell group is the same as the number of cells 2 in the sub-cell group.
[0022] Working principle: A first support block 6 and a second support block 7 are installed inside the aluminum barrel 1 as the main anti-compression structure to support the barrel and withstand the strong compressive force of the compression test, ensuring the stability of the overall structure. Additionally, the battery cell 2 is surrounded by the central support 4, the front support 11, and the rear support 12, forming the first layer of protection and preventing direct contact with the aluminum barrel 1. The aluminum barrel 1 itself has a certain strength, forming the second layer of protection. Even if the aluminum barrel 1 deforms, the space between the battery cell 2 and the barrel 1 can act as a buffer, preventing the barrel 1 from contacting and compressing the battery cell. The battery cell groups are connected by the front support 11 and the rear support 12, and the base plate 5, the first support block 6, the front support 11, and the rear support 12 are connected and fixed together by bolts 15, further increasing the overall strength. The above structure has high strength and meets the European compression resistance test requirements.
Claims
1. A battery structure for a power-assisted bicycle, comprising an aluminum can and a cell assembly consisting of several battery cells, characterized in that: The aluminum drum has a through-hole groove inside. A central support is installed in the groove in the middle of the aluminum drum. The central support includes a base plate. Main cell slots for accommodating the ends of the battery cell assembly are respectively provided on both sides of the base plate. A first support block is installed inside the base plate, passing through the base plate from top to bottom. One end of the first support block is located outside the base plate and abuts against the inner wall of the aluminum drum. The other end of the first support block is located outside the base plate and abuts against the inner wall of the aluminum drum. Second support blocks are respectively provided on both sides of the first support block. The second support blocks are located inside the base plate, with one end extending out of the base plate and abutting against the inner wall of the aluminum drum, and the other end located inside the base plate and passing through the groove. The battery cells are fixedly connected to the first support block by screws. The battery cell groups located on both sides of the substrate and whose ends are located in the main battery cell slots are the main battery cell groups. The remaining battery cell groups are the sub-battery cell groups. The two ends of the sub-battery cell groups are respectively connected to the front bracket and the rear bracket that cooperate with each other. The front bracket and the rear bracket are respectively provided with the front battery cell slot and the rear battery cell slot that accommodate the ends of the battery cells. The front bracket and the rear bracket are respectively provided with the protrusions and grooves that cooperate with each other. The main battery cell groups and the adjacent sub-battery cell groups are connected through the front bracket and the rear bracket. The substrate, the front bracket, the rear bracket and the first support block are fixedly connected by bolts and nuts.
2. The battery structure for a power-assisted bicycle according to claim 1, characterized in that: The front or rear support is provided with a connecting piece that connects the same electrode of the battery cell in the battery cell assembly.
3. The battery structure for a power-assisted bicycle according to claim 1, characterized in that: Through holes are provided in the middle of the substrate, the middle of the front bracket, the middle of the rear bracket, and the middle of the first support block, and bolts are located in the through holes.
4. The battery structure for a power-assisted bicycle according to claim 1, characterized in that: The main cell slot is divided into several main grooves that accommodate individual cells, and the number of main grooves is the same as the number of cells in the main cell group; the front cell slot is divided into several front grooves that accommodate individual cells, and the number of front grooves is the same as the number of cells in the sub-cell group; the rear cell slot is divided into several rear grooves that accommodate individual cells, and the number of rear grooves is the same as the number of cells in the sub-cell group.