Battery pack of electric bicycle

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery pack of an electric bicycle, which comprises an electric box, a battery cell module positioned in the electric box, an electric box cover mounted on the electric box, and a reinforcing rod, the electric box cover comprises a top cover and two cover plates positioned at the front end and the rear end of the top cover, and the cover plates are provided with first connecting holes; second connecting holes are formed in the two ends of each reinforcing rod. The electric bicycle has the advantages that the battery pack is additionally arranged on the rear seat of the electric bicycle, the battery pack and an original battery of the electric bicycle can be used at the same time, the endurance of the electric bicycle is greatly prolonged, and a rider can travel or commute for a longer distance. The rear seat of the electric bicycle is simple in structure and low in production cost, and the height and the area of an original rear seat of the electric bicycle are increased.

Description

Technical Field

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

[0002] Electric bicycles use batteries as auxiliary power, adding motors, controllers, and other components to a regular bicycle. Driven by electricity, they produce no exhaust emissions and are pollution-free. Compared to gasoline-powered motorcycles or cars, they effectively reduce carbon emissions and lessen environmental impact. Furthermore, their smaller size, lighter weight, and simple operation make them suitable for most riders. In urban areas, electric bicycles can maneuver flexibly through traffic, especially in narrow streets and alleys, offering greater convenience and effectively avoiding traffic congestion, thus improving travel efficiency. However, as electric bicycles are used over time, the batteries inevitably age, resulting in shorter battery life. Replacing original batteries is costly; therefore, it is necessary to research and develop a battery pack that can be installed on electric bicycles. Utility Model Content

[0003] The purpose of this utility model is to provide a battery pack for electric bicycles, which can be installed on the rear seat of electric bicycles to increase the range of electric bicycles.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a battery pack for an electric bicycle, including an electrical box, a battery cell module located inside the electrical box, an electrical box cover installed on the electrical box, and a reinforcing rod. The electrical box cover includes a top cover and two cover plates located at the front and rear ends of the top cover. The cover plates are provided with a first connecting hole, and the reinforcing rod is provided with a second connecting hole at both ends.

[0005] By adopting the above technical solution, the number of reinforcing rods is designed to be two. The two second connecting holes at both ends of each reinforcing rod are aligned with the first connecting holes on the two cover plates. The electric bicycle rear seat is provided with four mounting ears, and the mounting ears are provided with third connecting holes. During installation, the bolts are passed through the first connecting hole, the second connecting hole, and the third connecting hole in sequence and then threaded with the nut to realize the battery pack being installed on the electric bicycle rear seat.

[0006] A further feature of this invention is that the cover plate has a clearance hole, the cover plate has two folded edges, the first connecting hole is located on the folded edges, and the number of reinforcing rods is two.

[0007] By adopting the above technical solution, the battery cell module needs a cable to extend out and connect to the electric bicycle to provide power, and the clearance hole is used to provide space for the cable to pass through.

[0008] A further feature of this invention is that the electrical box cover includes two first side plates located on both sides of the top cover.

[0009] By adopting the above technical solution, and by setting up two first side panels, the number of external rainwater entering the electrical box is reduced.

[0010] A further feature of this invention is that a second side plate is formed on both sides of the cover plate, and the second side plate abuts against the first side plate.

[0011] By adopting the above technical solution, two second side panels are distributed on both sides of the electrical box, reducing the amount of external rainwater entering the electrical box.

[0012] A further feature of this invention is that the cover plate is hinged to the top cover, the reinforcing rod includes a cylindrical body and two rod portions inserted into both ends of the cylindrical body, each rod portion is fixed with a rack, the side wall of the cylindrical body is provided with a guide groove, a locking tooth portion is slidably inserted into the guide groove, the locking tooth portion is located below the rack, the side wall of the cylindrical body is threaded with a locking bolt, the locking bolt is vertically arranged, the upper end of the locking bolt abuts against the locking tooth portion, and the upper end of the locking tooth portion meshes with the rack.

[0013] By adopting the above technical solution, to accommodate electric bicycle rear seats of different sizes, the cover plate can rotate relative to the top cover to adjust the position of the first connecting hole. Rotating the locking bolt lowers it, and the locking teeth separate from the rack as the locking bolt descends, unlocking the rod and allowing its position to be adjusted. Rotating the locking bolt raises it, pushing the locking teeth upwards and engaging them with the rack, locking the rod position. This allows the length of the reinforcing rod to be changed to accommodate electric bicycle rear seats of different sizes. The locking method of the rod in this invention uses a rack, locking teeth, and locking bolt. By making the rack teeth smaller, the adjustment of the rod position is more precise, approaching stepless adjustment, while ensuring a secure locking of the rod position.

[0014] A further feature of this invention is that the cover of the electrical box is fixed to the electrical box by screws.

[0015] A further feature of this invention is that an angle is formed between the cover plate and the top cover.

[0016] A further feature of this invention is that a waterproof sealing seat is installed at one end of the electrical box, and the waterproof sealing seat is formed with a wire hole for the cable to pass through.

[0017] The beneficial effects of this utility model are: by adding a battery pack to the rear seat of an electric bicycle, it can be used simultaneously with the original battery of the electric bicycle, greatly increasing the electric bicycle's range and enabling riders to travel or commute over longer distances. This utility model has a simple structure, low manufacturing cost, and increases the height and area of ​​the original rear seat of the electric bicycle. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of Example 1.

[0019] Figure 2 This is a schematic diagram of the explosion state in Example 1.

[0020] Figure 3 This is a schematic diagram showing the positional relationship between the rod, rack, locking teeth, and locking bolt in Embodiment 2.

[0021] In the diagram, 1. Electrical box; 2. Battery cell module; 3. Electrical box cover; 31. Top cover; 32. Cover plate; 321. First connecting hole; 322. Clearance hole; 323. Folded edge; 33. First side plate; 34. Second side plate; 4. Reinforcing rod; 41. Second connecting hole; 42. Cylinder; 421. Guide groove; 422. Locking teeth; 423. Locking bolt; 43. Rod; 431. Rack; 5. Waterproof sealing seat. Detailed Implementation

[0022] Example 1: A battery pack for an electric bicycle, such as Figure 1 , Figure 2 As shown, the device includes an electrical box 1, a battery cell module 2 installed and fixed inside the electrical box 1, an electrical box 1 cover installed on the electrical box 1, and two reinforcing rods 4. The upper end of the electrical box 1 has an open structure, and the electrical box 1 cover is fixed to the electrical box 1 with screws to cover the open structure. The electrical box 1 cover is integrally formed and includes a top cover 31, two cover plates 32 located at the front and rear ends of the top cover 31, two first side plates 33 located on both sides of the top cover 31, and two second side plates 34 located on both sides of the cover plates 32. The second side plates 34 abut against the first side plates 33. The cover plates 32 and the top cover 31 form an angle. Each cover plate 32 has a clearance hole 322 and two flanges 323 distributed on both sides of the clearance hole 322. Each flange 323 has a first connecting hole 321. Each reinforcing rod 4 has a second connecting hole 41 at both ends. The electric bicycle has four mounting ears formed on the rear seat, each with a third connecting hole. The four first connecting holes 321, four second connecting holes 41, and four third connecting holes correspond one-to-one. A waterproof sealing seat 5 is installed at one end of the electrical box 1, and the waterproof sealing seat 5 has a wire hole for the cable to pass through. When installing the battery pack, take four bolts and four nuts. The four bolts correspond to the four first connecting holes 321 respectively. Adjust the first connecting holes 321, the corresponding second connecting holes 41, and the corresponding third connecting holes to be in a coaxial position. The bolts are then threaded onto the nuts after passing through the first connecting holes 321, the second connecting holes 41, and the third connecting holes in sequence.

[0023] Example 2: A battery pack for an electric bicycle, differing from Example 1 in that, as shown in... Figure 3As shown, the cover plate 32 is hinged to the top cover 31, and the first side plate 33 does not abut against the second side plate 34. The reinforcing rod 4 includes a cylindrical body 42 and two rod portions 43 inserted at both ends of the cylindrical body 42. A rack 431 is fixed to the rod portion 43. The inner wall of the cylindrical body 42 is formed with an upper groove and a lower groove, which are connected to each other. The upper groove is rectangular and is used to accommodate the rod portion 43. The rod portion 43 has a rectangular cross-section and is slidably inserted into the upper groove. The lower slot has a rectangular cross-section, with a smaller cross-sectional area and width than the upper slot. The rack 431 is located inside the lower slot. The lower side wall of the cylinder 42 is provided with a guide groove 421. The guide groove 421 is vertically arranged and has a rectangular cross-section. A locking tooth 422 is slidably inserted into the guide groove 421. The lower half of the locking tooth 422 has a rectangular cross-section and is inserted into the guide groove 421. The upper end of the locking tooth 422 is formed with teeth. The locking tooth 422 is located below the rack 431. A locking bolt 423 is threadedly connected to the side wall of the cylinder 42. The locking bolt 423 is vertically arranged. The upper end of the locking bolt 423 abuts against the locking tooth 422. The teeth at the upper end of the locking tooth 422 mesh with the rack 431. The lower end of the locking bolt 423 is located outside the cylinder 42.

[0024] Rotate the locking bolt 423 to lower it. After the locking teeth 422 lower, they disengage from the rack 431. At this time, the positions of the rod 43 and the cylinder 42 can be adjusted to adjust the overall length of the reinforcing rod 4. Rotate the locking bolt 423 to raise it. After the locking teeth 422 rise, they engage with the rack 431, locking the position of the rod. By adjusting the length of the reinforcing rod 4 and the rotation angle of the cover plate 32, the battery pack can be adapted to the rear seats of electric bicycles of different sizes.

Claims

1. A battery pack for an electric bicycle, characterized in that: The device includes an electrical box (1), a battery cell module (2) located inside the electrical box (1), an electrical box (1) cover installed on the electrical box (1), and a reinforcing rod (4). The electrical box (1) cover includes a top cover (31) and two cover plates (32) located at the front and rear ends of the top cover (31). The cover plates (32) have a first connecting hole (321), and the reinforcing rod (4) has a second connecting hole (41) at both ends.

2. The battery pack for an electric bicycle according to claim 1, characterized in that: The cover plate (32) has a clearance hole (322), and two flanges (323) are formed on the cover plate (32). The first connecting hole (321) is located on the flange (323), and there are two reinforcing rods (4).

3. The battery pack for an electric bicycle according to claim 1, characterized in that: The cover of the electrical box (1) includes two first side plates (33) located on both sides of the top cover (31).

4. The battery pack for an electric bicycle according to claim 3, characterized in that: The cover plate (32) has second side plates (34) formed on both sides, and the second side plates (34) abut against the first side plate (33).

5. A battery pack for an electric bicycle according to claim 1 or 4, characterized in that: The cover plate (32) is hinged to the top cover (31). The reinforcing rod (4) includes a cylindrical body (42) and two rods (43) inserted into both ends of the cylindrical body (42). A rack (431) is fixed to the rod (43). A guide groove (421) is provided on the side wall of the cylindrical body (42). A locking tooth (422) is slidably inserted in the guide groove (421). The locking tooth (422) is located below the rack (431). A locking bolt (423) is threadedly connected to the side wall of the cylindrical body (42). The locking bolt (423) is vertically set. The upper end of the locking bolt (423) abuts against the locking tooth (422). The upper end of the locking tooth (422) meshes with the rack (431).

6. The battery pack for an electric bicycle according to claim 1, characterized in that: The cover of the electrical box (1) is fixed to the electrical box (1) by screws.

7. The battery pack for an electric bicycle according to claim 1, characterized in that: The cover plate (32) and the top cover (31) form an angle.

8. The battery pack for an electric bicycle according to claim 1, characterized in that: A waterproof sealing seat (5) is installed at one end of the electrical box (1), and the waterproof sealing seat (5) is formed with a wire hole for the cable to pass through.

Images