Battery pack connecting structure and electric bicycle

Abstract

The utility model relates to electric bicycle technical field especially, a kind of battery pack connecting structure and electric bicycle.It is connected with the structure of battery pack, battery cell, plug-in board, connecting assembly and frame component in the battery pack connecting structure.The battery pack body has accommodating chamber, accommodating chamber is provided with battery cell and plug-in board, plug-in board is detachably connected with battery cell, plug-in board is fixedly connected with the inner wall of battery pack body.Connecting assembly is fixed on the outer wall of battery pack body, and first electric connection port is arranged on connecting assembly, and first electric connection port is electrically connected with battery cell.Frame component is detachably connected with connecting assembly, and second electric connection port is arranged on frame component;Second electric connection port is correspondingly inserted with first electric connection port.Battery pack body and frame component are convenient to disassemble, improve convenience;Battery cell is set in battery pack body and is immune from pollution of external environment, prolongs service life, improves aesthetic property.

Description

Technical Field

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

[0002] With the increasing demand for short-distance travel, electric bicycles, with their compact size, convenient storage, and flexible transport, are gradually becoming a popular mode of transportation for consumers. As the core power component of electric bicycles, the battery's connection and installation structure plays a crucial role in the vehicle's portability, user experience, and functional expansion.

[0003] In existing technologies, the battery is often exposed and forcibly fixed to the frame. This design not only exposes the battery to the external environment, making it susceptible to corrosion from dust and rain, thus shortening its lifespan, but also damages the overall aesthetics of the electric bicycle. In addition, it makes it difficult for users to remove the existing battery, resulting in poor portability.

[0004] Therefore, there is an urgent need to design a battery pack connection structure and an electric bicycle to solve the above technical problems. Utility Model Content

[0005] The purpose of this utility model is to propose a battery pack connection structure and an electric bicycle. The battery pack body and the frame assembly are easy to disassemble, improving convenience. The battery units are set in the battery pack body to avoid pollution from the external environment, extending service life and improving aesthetics.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] On one hand, this utility model provides a battery pack connection structure, including:

[0008] The battery pack body has a receiving chamber, in which a battery unit and a connector plate are disposed. The connector plate is detachably connected to the battery unit and is fixedly connected to the inner wall of the battery pack body.

[0009] A connecting component is fixed to the outer wall of the battery pack body. The connecting component is provided with a first electrical connection port, and the first electrical connection port is electrically connected to the battery cell.

[0010] A frame assembly, wherein the frame assembly is detachably connected to the connecting assembly, and the frame assembly is provided with a second electrical connection port; the second electrical connection port is plugged into the first electrical connection port.

[0011] As an optional technical solution for the battery pack connection structure, the connection component includes a first connection part disposed on the side wall of the battery pack body, and the frame assembly includes a connection block, which is detachably connected to the first connection part.

[0012] As an optional technical solution for the battery pack connection structure, the first connecting part is provided with a sliding groove, the connecting block is provided with a sliding rail, and the sliding rail is slidably connected to the sliding groove.

[0013] As an optional technical solution for the battery pack connection structure, the connection component further includes a second connection part, which is disposed on the bottom wall of the battery pack body and connected to the first connection part, and the first electrical connection port is disposed on the second connection part;

[0014] The frame assembly also includes a connecting plate, which is connected to the connecting block; the second electrical connection port is disposed on the connecting plate.

[0015] As an optional technical solution for the battery pack connection structure, the second connection part is provided with a positioning post, and the connection plate is provided with a positioning hole, and the positioning post can be inserted into the positioning hole.

[0016] As an optional technical solution for battery pack connection structure, multiple positioning posts and multiple positioning holes are provided, with the multiple positioning posts evenly distributed around the first electrical connection port and the multiple positioning holes evenly distributed around the second electrical connection port.

[0017] As an optional technical solution for battery pack connection structure, the accommodating chamber includes a battery mounting area and a storage area. The battery unit and the plug-in plate are both disposed in the battery mounting area, and the storage area is a storage space that is independent and isolated from the battery mounting area.

[0018] As an optional technical solution for the battery pack connection structure, the battery pack body also includes an isolation plate, which is disposed in the accommodating cavity and configured to isolate the storage area from the battery mounting area.

[0019] As an optional technical solution for the battery pack connection structure, the storage area is located above the battery mounting area; and the top or side of the battery pack body is provided with an openable access port, which is connected to the storage area.

[0020] As an optional technical solution for the battery pack connection structure, the battery unit is also provided with an external power interface for external power supply. The external power interface passes through the side wall of the battery pack body and is exposed. The external power interface includes at least one of USB-A interface and USB-C interface.

[0021] On the other hand, this utility model provides an electric bicycle, which includes a frame, wheels, a drive unit, and the aforementioned battery pack connection structure; the wheels are rotatably connected to both ends of the frame, the drive unit is fixedly mounted on the frame, and the drive unit is electrically connected to the battery unit in the battery pack connection structure; the frame assembly in the battery pack connection structure is integrally formed or fixed to the head tube of the frame by fasteners;

[0022] When the battery pack body is connected to the vehicle frame assembly via the connecting component, the battery unit can supply power to the drive device through the plug-in connection of the first electrical connection port and the second electrical connection port.

[0023] As an optional technical solution for electric bicycles, the frame is provided with an elastic buffer, and the elastic buffer is positioned toward the storage area of ​​the battery pack body. The elastic buffer is configured to cushion items in the storage area during the riding of the electric bicycle.

[0024] The beneficial effects of this utility model include at least the following:

[0025] This utility model provides a battery pack connection structure, which includes a battery pack body, battery cells, a connector plate, a connecting assembly, and a frame assembly. The battery pack body has a receiving chamber, in which the battery cells and the connector plate are disposed. The connector plate is detachably connected to the battery cells and fixedly connected to the inner wall of the battery pack body. The connecting assembly is fixed to the outer wall of the battery pack body and has a first electrical connection port electrically connected to the battery cells. The frame assembly is detachably connected to the connecting assembly and has a second electrical connection port; the second electrical connection port is plugged into the first electrical connection port.

[0026] In summary, the accommodating chamber of the battery pack body of this utility model provides a sealed space for the battery units, preventing them from being directly exposed. This isolates the battery units from external contaminants such as dust and rainwater, solving the problems of battery corrosion and short lifespan in traditional technologies. It also improves the overall aesthetics of the electric bicycle. Furthermore, the plug-in plate is detachably connected to the battery units and fixedly connected to the inner wall of the battery pack body. This achieves stable assembly of the battery units to the battery pack body while allowing for individual disassembly of the battery units for maintenance or replacement. This avoids the limitations of fixed battery assembly in traditional technologies and enhances disassembly flexibility.

[0027] Furthermore, the connecting assembly is fixed to the outer wall of the battery pack body and has a first electrical connection port for electrical connection with the battery cells. The frame assembly has a second electrical connection port. The frame assembly and the connecting assembly are detachably connected, and the second electrical connection port is plugged into the first electrical connection port. This design allows the mechanical and electrical connections between the battery pack body and the frame assembly to be realized simultaneously. This ensures the stability of the battery cells supplying power to the electric bicycle and also allows the battery pack body to be removed as a whole by disassembling the connection between the frame assembly and the connecting assembly, improving the convenience of battery pack body assembly and disassembly.

[0028] This utility model also provides an electric bicycle in which the battery unit is housed within the battery pack, protecting it from external environmental pollution, extending its lifespan, and enhancing the vehicle's aesthetics. Simultaneously, the battery pack is easily disassembled, improving convenience and significantly enhancing the ease and practicality of short-distance travel. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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 the content of the embodiments of this utility model and these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the battery pack connection structure provided in an embodiment of the present invention from one perspective;

[0031] Figure 2 This is a schematic diagram of the battery pack connection structure provided in this embodiment of the present invention from another perspective;

[0032] Figure 3 This is an exploded view of the battery pack connection structure provided in this embodiment of the present invention from one perspective;

[0033] Figure 4 This is an exploded view of the battery pack connection structure provided in this embodiment of the present invention from another perspective.

[0034] Figure Labels

[0035] 10. Battery pack body; 11. Battery unit; 12. Connector board;

[0036] 20. Connecting component; 21. First electrical connection port; 22. First connecting part; 221. Slide groove; 23. Second connecting part; 231. Positioning post;

[0037] 30. Frame assembly; 31. Second electrical connection port; 32. Connecting block; 321. Slide rail; 33. Connecting plate; 331. Positioning hole;

[0038] 40. Head tube. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0046] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0047] This embodiment provides a battery pack connection structure that facilitates the disassembly of the battery pack body and the vehicle frame assembly, improving convenience. The battery cells are housed within the battery pack body, protecting them from external environmental contamination, extending their lifespan, and enhancing aesthetics.

[0048] like Figures 1-4 As shown, the battery pack connection structure mainly includes a battery pack body 10, battery cells 11, a connector plate 12, a connecting assembly 20, and a frame assembly 30. The battery pack body 10 has a receiving chamber, in which the battery cells 11 and the connector plate 12 are disposed. The connector plate 12 is detachably connected to the battery cells 11 and fixedly connected to the inner wall of the battery pack body 10. The connecting assembly 20 is fixed to the outer wall of the battery pack body 10 and has a first electrical connection port 21, which is electrically connected to the battery cells 11. The frame assembly 30 is detachably connected to the connecting assembly 20 and has a second electrical connection port 31; the second electrical connection port 31 is correspondingly connected to the first electrical connection port 21.

[0049] Based on the above design, the accommodating chamber of the battery pack body 10 in this embodiment provides a closed space for the battery unit 11, preventing the battery unit 11 from being directly exposed. This isolates the battery unit from external pollutants such as dust and rainwater, solving the problems of battery corrosion and short lifespan in traditional technologies, and also improving the overall aesthetics of the electric bicycle. Simultaneously, the plug-in plate 12 is detachably connected to the battery unit 11 and fixedly connected to the inner wall of the battery pack body 10. This achieves stable assembly of the battery unit 11 and the battery pack body 10, while also allowing for individual disassembly of the battery unit 11 for maintenance or replacement. This avoids the limitations of fixed battery assembly in traditional technologies and improves disassembly flexibility.

[0050] Furthermore, the connecting component 20 is fixed to the outer wall of the battery pack body 10 and has a first electrical connection port 21 that is electrically connected to the battery unit 11. The frame assembly 30 has a second electrical connection port 31. The frame assembly 30 and the connecting component 20 are detachably connected, and the second electrical connection port 31 is plugged into the first electrical connection port 21. This design enables the mechanical and electrical connections between the battery pack body 10 and the frame assembly 30 to be realized simultaneously. This ensures the stability of the battery unit 11 supplying power to the electric bicycle, and also allows the battery pack body 10 to be removed as a whole by disassembling the connection between the frame assembly 30 and the connecting component 20, thus improving the convenience of disassembling and assembling the battery pack body 10.

[0051] In some alternative embodiments, the battery pack body 10 may be made of materials such as PVC coated fabric, waterproof nylon Oxford cloth, EVA composite material, or neoprene rubber. The battery unit 11 is an 18650 lithium-ion battery pack. The connecting assembly 20 and the frame assembly 30 are both made of stainless steel.

[0052] For example, in this embodiment, the sidewall of the battery unit 11 has two symmetrical protrusions; the connector plate 12 is made of PC material, and the connector plate 12 has two U-shaped slots corresponding to the protrusions of the battery unit 11. The battery unit 11 and the connector plate 12 are detachably connected by engaging the protrusions with the slots. The connector plate 12 is fixed to the inner wall of the battery pack body 10 by four M3 screws, or it is bonded to the inner wall of the battery pack body 10 by adhesive.

[0053] like Figures 3-4 As shown, the connecting component 20 includes a first connecting part 22, which is disposed on the side wall of the battery pack body 10. The frame assembly 30 includes a connecting block 32, which is detachably connected to the first connecting part 22, thereby achieving the purpose of detachable connection between the battery pack body 10 and the frame assembly 30.

[0054] Furthermore, in this embodiment, the first connecting portion 22 is provided with a sliding groove 221, and the connecting block 32 is provided with a sliding rail 321, with the sliding rail 321 slidably connected to the sliding groove 221. The sliding engagement of the sliding groove 221 and the sliding rail 321 enables a guiding and positioning function. When installing the battery pack body 10, the user only needs to align the sliding groove 221 with the sliding rail 321 and push it along the sliding direction to complete the initial positioning, reducing the difficulty of operation. At the same time, during the sliding process, the first electrical connection port 21 and the second electrical connection port 31 can be gradually guided to align, avoiding pin bending or poor contact caused by misalignment of the first electrical connection port 21 and the second electrical connection port 31.

[0055] In addition, the cooperation between the slide groove 221 and the slide rail 321 can limit the lateral displacement of the battery pack body 10 (perpendicular to the sliding direction). Especially when the electric bicycle is vibrating, it can prevent the battery pack body 10 from shaking, improve the vibration resistance of the battery pack body 10, and reduce the abnormal noise problem during the electric bicycle ride.

[0056] Furthermore, the slide 221 extends vertically and is a T-shaped groove, which allows the user to insert the slide 221 into the slide rail 321 from top to bottom, which is ergonomic. When the user takes the battery pack body 10, he can slide it upward to disassemble it without the need for additional pressing or rotating of the unlocking parts, which is labor-saving and efficient.

[0057] like Figures 3-4 As shown, the connecting component 20 in this embodiment further includes a second connecting portion 23, which is disposed on the bottom wall of the battery pack body 10 and connected to the first connecting portion 22. A first electrical connection port 21 is disposed on the second connecting portion 23. The frame assembly 30 further includes a connecting plate 33, which is connected to the connecting block 32; the second electrical connection port 31 is disposed on the connecting plate 33.

[0058] Specifically, the second connecting part 23 and the first connecting part 22 form an "L-shaped" connecting assembly 20, and the connecting plate 33 and the connecting block 32 form an "L-shaped" frame assembly 30. The two work together to achieve two-point support for the side wall and bottom of the battery pack body 10, thereby improving the support strength, increasing the load-bearing capacity, and preventing the battery pack body 10 from sagging or tilting.

[0059] The first electrical connection port 21 is located on the second connection portion 23 near the bottom of the battery pack body 10, and the second electrical connection port 31 is located on the connection plate 33. When the first connection portion 22 mates with the connection block 32, the second connection portion 23 and the connection plate 33 can be naturally aligned, ensuring that the first electrical connection port 21 and the second electrical connection port 31 are accurately connected, avoiding problems with poor contact.

[0060] In some alternative embodiments, the first connecting portion 22 and the second connecting portion 23 are integrally formed, and the connecting plate 33 and the connecting block 32 are integrally formed, thereby improving the mechanical strength and fatigue resistance of the battery pack connection structure.

[0061] like Figure 4 As shown, a positioning post 231 is provided on the second connecting part 23, and a positioning hole 331 is provided on the connecting plate 33, and the positioning post 231 can be inserted into the positioning hole 331.

[0062] Specifically, the insertion and engagement of the positioning post 231 with the positioning hole 331 precedes the contact between the first electrical connection port 21 and the second electrical connection port 31. During installation, the positioning post 231 is inserted into the positioning hole 331 first, guiding the first electrical connection port 21 and the second electrical connection port 31 to be precisely aligned, avoiding damage to the pins of the first electrical connection port 21 and / or the second electrical connection port 31 due to misalignment and collision, thus extending the service life.

[0063] The engagement of the positioning post 231 and the positioning hole 331 restricts the rotation of the battery pack body 10, preventing the first electrical connection port 21 from becoming loose or disconnected from the second electrical connection port 31 even when riding an electric bicycle on a bumpy road, thus improving power supply stability.

[0064] When the positioning post 231 is fully inserted into the positioning hole 331, a distinct "sense of being in place" will be generated, that is, a sudden change in resistance. Users can judge whether the battery pack body 10 is installed in place by touch, without having to check the electrical connection status, which improves the convenience of use and avoids power interruption problems caused by improper installation.

[0065] For example, the positioning post 231 is a cylindrical structure made of PA66 material, and the positioning post 231 and the second connecting part 23 are integrally injection molded. The positioning hole 331 is a circular hole on the connecting plate 33.

[0066] Furthermore, in this embodiment, multiple positioning posts 231 and positioning holes 331 are provided, with the multiple positioning posts 231 evenly distributed around the first electrical connection port 21 and the multiple positioning holes 331 evenly distributed around the second electrical connection port 31. This can improve the stress around the first electrical connection port 21 and the second electrical connection port 31, avoid local stress concentration, and extend the service life.

[0067] In addition, multiple evenly distributed positioning posts 231 and positioning holes 331 can restrict the displacement of the battery pack body 10 from multiple directions (such as lateral and circumferential directions), so that even if the electric bicycle is subjected to large vibrations (such as going over speed bumps), the battery pack body 10 can be prevented from shifting, ensuring stable electrical connection.

[0068] For example, both the positioning pin 231 and the positioning hole 331 can be set to four.

[0069] In this embodiment, the accommodating chamber includes a battery mounting area and a storage area. The battery unit 11 and the connector plate 12 are both located in the battery mounting area, while the storage area is a storage space that is independent and isolated from the battery mounting area. This allows the battery pack body 10 to simultaneously provide power supply and short-distance storage functions. When riding, users can put their personal belongings (such as mobile phones and keys) and small shopping items (such as vegetables and snacks) in the storage area without having to carry a separate handbag or install a shopping basket, thus improving the practicality and functionality of the electric bicycle.

[0070] The independent design of the storage area and battery installation area prevents items in the storage area (such as liquids, dust, and sharp objects) from entering the battery installation area, thus preventing contamination or damage to the battery unit 11 (such as short circuits caused by liquids). Simultaneously, the battery unit 11 in the battery installation area generates heat during operation; this isolation design also prevents heat transfer to items in the storage area, thus avoiding the risk of food spoilage or flammable and explosive materials being heated, achieving dual protection.

[0071] In addition, the partitioned design of the accommodating chambers within the battery pack body 10 makes full use of the internal space of the battery pack body 10, without having to occupy other areas of the frame assembly 30, thus making the electric bicycle smaller in size.

[0072] Furthermore, the battery pack body 10 in this embodiment also includes a separator plate disposed within the accommodating cavity, which is configured to separate the storage area from the battery mounting area. Exemplarily, the separator plate may be made of a heat-insulating and insulating material to further prevent the transfer of dust, liquid, and heat.

[0073] The separator can serve as an internal support structure for the battery pack body 10, enhancing the deformation resistance of the accommodating chamber. When heavy items (such as 3kg of vegetables) are placed in the storage area, the separator can directly bear the weight, preventing the weight from being transferred to the battery unit 11 and causing it to be squeezed and damaged, thus improving safety.

[0074] In some optional embodiments, the separator is made of PP+fiberglass material, 2mm thick, and its dimensions are consistent with the cross-section of the accommodating chamber. The upper surface of the separator (storage area side) is provided with two reinforcing ribs to improve load-bearing capacity; the lower surface of the separator (battery mounting area side) is provided with an epoxy resin insulating coating to avoid conductive contact with the battery cell 11.

[0075] In some optional embodiments, the isolation plate is fixed to the inner wall of the battery pack body 10 by four buckles, and a silicone sealing strip is provided around the edge of the isolation plate. The sealing strip is interference-fitted with the inner wall of the battery pack body 10 to achieve dust and water resistance.

[0076] In some optional embodiments, the buckle of the separator plate is provided with a disassembly notch, which allows the user to pry the buckle off by inserting a flathead screwdriver into the notch, thereby facilitating the maintenance and replacement of the battery unit 11 in the future.

[0077] In this embodiment, the storage area is located above the battery mounting area; and the top or side of the battery pack body 10 is provided with an openable access port that communicates with the storage area. The storage area's location above the battery mounting area is ergonomically designed. When standing or riding, users can easily reach out and retrieve items from the top / side of the battery pack body 10 without bending over or adjusting their riding posture, thus improving convenience.

[0078] Compared to open storage areas, closable access openings can effectively prevent items from falling out while riding, such as preventing phones from slipping out when going over bumpy roads. They can also prevent rainwater and dust from entering the storage area.

[0079] In some optional embodiments, the storage area is located directly above the battery mounting area, with their center lines coinciding; the access port is a flip cover on the top of the battery pack body 10, and the flip cover is made of the same material as the battery pack body 10. A first magnet is provided on one side of the flip cover, and a second magnet is provided on the outer wall of the battery pack body 10. The flip cover is magnetically connected by the first and second magnets to open and close the access port.

[0080] In this embodiment, the battery unit 11 is also provided with an external power interface for external power supply. The external power interface passes through the side wall of the battery pack body 10 and is exposed. The external power interface includes at least one of a USB-A interface and a USB-C interface.

[0081] Users can detach the battery pack body 10 from the frame assembly 30 and power their mobile phones, tablets, Bluetooth headsets and other portable electronic products through the exposed external power interface. This allows the battery pack body 10 to power electric bicycles as well as serve as an independent mobile power source. For example, when camping outdoors, the battery pack body 10 can be detached to power the user's camping equipment, expanding the usage scenarios and improving flexibility and applicability.

[0082] The external power interface is exposed on the side wall of the battery pack body 10, allowing for easy plugging and unplugging of cables without disassembling the battery pack body 10.

[0083] This embodiment also provides an electric bicycle, which includes a frame, wheels, a drive unit, and the aforementioned battery pack connection structure. The wheels are rotatably connected to both ends of the frame, and the drive unit is fixedly mounted on the frame, forming an electrical connection with the battery unit 11 in the battery pack connection structure. The frame assembly 30 in the battery pack connection structure is integrally formed or fixed to the head tube 40 of the frame by fasteners. The head tube 40 of the frame is located in a non-critical movement area of ​​the folding electric bicycle. This area is far from the wheels and the drive unit. Placing the frame assembly 30 in the head tube 40 area of ​​the battery pack connection structure does not affect the folding function of the vehicle and facilitates the user's access to the battery pack body 10. When the battery pack body 10 is connected to the frame assembly 30 through the connecting assembly 20, the battery unit 11 can transmit power to the drive unit through the insertion and engagement of the first electrical connection port 21 and the second electrical connection port 31.

[0084] Because the electric bicycle has the aforementioned battery pack connection structure, the battery unit 11 is located inside the battery pack body 10, which protects it from external environmental pollution, extends its service life, and enhances the vehicle's aesthetics. At the same time, the battery pack body 10 is easy to disassemble, improving convenience and significantly enhancing the convenience and practicality of short-distance travel.

[0085] Optionally, the frame in this embodiment is a folding aluminum alloy frame.

[0086] In this embodiment, an elastic buffer is provided on the frame, and the elastic buffer is positioned toward the storage area of ​​the battery pack body 10. The elastic buffer is configured to cushion the items in the storage area during the riding of the electric bicycle.

[0087] The elastic buffer is located between the outside of the battery pack storage area and the frame. It can absorb the impact force during riding, prevent the battery pack body 10 or the frame from being scratched or deformed due to the impact, and reduce the impact noise, thus improving the riding experience.

[0088] In some alternative implementations, the elastic buffer is made of EVA foam, measuring 30mm × 20mm × 5mm, and is attached to the outside of the storage area of ​​the battery pack body 10 using waterproof double-sided adhesive, or to the vehicle frame. The surface of the elastic buffer is marked with buffer area markings to prevent accidental removal by the user.

[0089] In some optional embodiments, the electric bicycle also includes a power display device mounted on the handlebar grip area of ​​the frame (within the user's line of sight). The power display device is electrically connected to the battery unit 11 and is used to display the remaining power of the battery unit 11 in real time. The user can know the power supply status at any time and avoid breakdowns due to insufficient power. At the same time, the power display device can indirectly indicate battery failure (such as a sudden drop in power), improving usage safety.

[0090] For example, the power display device is an LCD liquid crystal display screen.

[0091] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0092] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A battery pack connection structure, characterized in that, include: The battery pack body (10) has a receiving chamber, in which a battery unit (11) and a plug plate (12) are provided. The plug plate (12) is detachably connected to the battery unit (11) and is fixedly connected to the inner wall of the battery pack body (10). A connecting component (20) is fixed to the outer wall of the battery pack body (10). The connecting component (20) is provided with a first electrical connection port (21), and the first electrical connection port (21) is electrically connected to the battery cell (11). The frame assembly (30) is detachably connected to the connecting assembly (20), and the frame assembly (30) is provided with a second electrical connection port (31); the second electrical connection port (31) is plugged into the first electrical connection port (21).

2. The battery pack connection structure according to claim 1, characterized in that, The connecting component (20) includes a first connecting part (22) disposed on the side wall of the battery pack body (10), and the frame assembly (30) includes a connecting block (32) which is detachably connected to the first connecting part (22).

3. The battery pack connection structure according to claim 2, characterized in that, The first connecting part (22) is provided with a sliding groove (221), and the connecting block (32) is provided with a sliding rail (321). The sliding rail (321) is slidably connected to the sliding groove (221).

4. The battery pack connection structure according to claim 2, characterized in that, The connecting component (20) further includes a second connecting part (23), which is disposed on the bottom wall of the battery pack body (10) and is connected to the first connecting part (22). The first electrical connection port (21) is disposed on the second connecting part (23). The frame assembly (30) also includes a connecting plate (33) which is connected to the connecting block (32); the second electrical connection port (31) is disposed on the connecting plate (33).

5. The battery pack connection structure according to claim 4, characterized in that, The second connecting part (23) is provided with a positioning post (231), and the connecting plate (33) is provided with a positioning hole (331). The positioning post (231) can be inserted into the positioning hole (331).

6. The battery pack connection structure according to claim 5, characterized in that, The positioning posts (231) and the positioning holes (331) are both provided in multiples, and the multiple positioning posts (231) are evenly distributed around the first electrical connection port (21), and the multiple positioning holes (331) are evenly distributed around the second electrical connection port (31).

7. The battery pack connection structure according to claim 1, characterized in that, The accommodating chamber includes a battery installation area and a storage area. The battery unit (11) and the plug-in plate (12) are both located in the battery installation area, and the storage area is a storage space that is independent and isolated from the battery installation area.

8. The battery pack connection structure according to claim 7, characterized in that, The battery pack body (10) also includes a separator plate disposed in the accommodating cavity, the separator plate being configured to separate the storage area from the battery mounting area.

9. The battery pack connection structure according to claim 7, characterized in that, The storage area is located above the battery mounting area; and the top or side of the battery pack body (10) is provided with an openable access port, which is connected to the storage area.

10. The battery pack connection structure according to claim 1, characterized in that, The battery unit (11) is also provided with an external power interface for external power supply. The external power interface passes through the side wall of the battery pack body (10) and is exposed. The external power interface includes at least one of USB-A interface and USB-C interface.

11. An electric bicycle, characterized in that, The electric bicycle includes a frame, wheels, a drive unit, and a battery pack connection structure as described in any one of claims 1-10; the wheels are rotatably connected to both ends of the frame, the drive unit is fixedly mounted on the frame, and the drive unit is electrically connected to the battery unit (11) in the battery pack connection structure; the frame assembly (30) in the battery pack connection structure is integrally formed or fixed to the head tube (40) of the frame by fasteners; When the battery pack body (10) is connected to the frame assembly (30) through the connecting component (20), the battery unit (11) can supply power to the drive device through the plug-in cooperation of the first electrical connection port (21) and the second electrical connection port (31).

12. The electric bicycle according to claim 11, characterized in that, The frame is provided with an elastic buffer, which is positioned toward the storage area of ​​the battery pack body (10). The elastic buffer is configured to cushion items in the storage area during electric bicycle riding.

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