A battery module and battery box

Abstract

This utility model relates to the field of battery technology and discloses a battery module and a battery box. The battery module includes a circuit board with multiple battery cells electrically connected to it, and a bracket for fixing the battery cells, which is detachably connected to both ends of the circuit board. The multiple battery cells are located between two sets of brackets, and a first connection end is fixedly connected to the circuit board. A conductive connecting piece is fixedly connected to the bracket. The positive and negative terminals of the battery cells are respectively soldered to the corresponding connecting pieces. A second connection end is inserted into the first connection end, and a wire harness is fixedly connected to the second connection end. The wires of the wire harness are fixedly connected to the corresponding connecting pieces. This utility model has the advantage of convenient installation of the battery module, improving maintenance efficiency. At the same time, by using a labyrinth-type sealing gasket, it solves the problem of insufficient waterproof performance of the battery box and can meet the requirements of electric motorcycles to adapt to various road conditions.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery module and a battery box. Background Technology

[0002] With the acceleration of urbanization and the increasing awareness of environmental protection, electric motorcycles have been widely used in personal short-distance travel due to their advantages such as energy saving, low emissions, and low operating costs. As the core power source of electric motorcycles, the performance of the power battery directly determines the vehicle's range, acceleration performance, safety reliability, and overall user experience.

[0003] Currently, most electric motorcycles use detachable or fixed battery packs for power supply. These battery packs consist of battery modules, a housing, a battery management system, and related mounting components. However, in practical use, existing battery systems still have many shortcomings. For example, the electrical connections between battery modules are complex, making maintenance inconvenient, and the overall structural strength is insufficient, making it difficult to meet the requirements for use in long-term vibration environments. Furthermore, the waterproofing structure of current battery housings is complex. Therefore, traditional battery housing designs can no longer simultaneously achieve safety, reliability, and convenience.

[0004] Therefore, there is an urgent need to provide a battery module and battery box that are structurally sound, safe, reliable, and easy to maintain, in order to meet the high standards required for power battery systems in electric vehicles such as electric motorcycles. Utility Model Content

[0005] This utility model provides a battery module that, through a bracket and connecting piece, enables quick assembly and disassembly of battery cells, solving the problems of complex electrical connection methods and inconvenient maintenance mentioned in the background art.

[0006] This utility model provides the following technical solution:

[0007] A battery module includes a circuit board on which multiple battery cells are electrically connected, and a bracket for fixing the battery cells, detachably connected to both ends of the circuit board. Multiple battery cells are located between two sets of brackets, and a first connection end is fixedly connected to the circuit board. A conductive connecting piece is fixedly connected to the bracket. The positive and negative terminals of the battery cells are respectively soldered to corresponding connecting pieces. A second connection end is inserted into the first connection end, and a wire harness is fixedly connected to the second connection end. The wires of the wire harness are fixedly connected to the corresponding connecting pieces.

[0008] As a preferred embodiment of this utility model, the bracket is provided with multiple mounting holes, and an elastic guide plate extending into the mounting hole is fixedly connected to the connecting piece, with the electrode of the battery cell abutting against the elastic guide plate.

[0009] As a preferred embodiment of this utility model, the top of the bracket abuts against the bottom of the circuit board, and the bracket is detachably connected to the circuit board via a first screw.

[0010] As a preferred embodiment of this utility model, the outer wall of the bracket is provided with a wire groove, and the wires of the wire harness are snapped into the wire groove.

[0011] As a preferred embodiment of this utility model, a junction plate is fixedly connected to the connecting piece, and the wires of the wire harness are electrically connected to the junction plate.

[0012] A battery box includes a housing for accommodating a battery module, wherein a top cover is detachably connected to the top of the housing, a connector for charging and discharging the battery module is fixedly connected to the top cover, a sealing gasket is installed at one end of the top cover extending into the housing, and a plurality of annular grooves are formed on the sidewall of the sealing gasket, the end face of the opening of the annular groove abutting against the inner wall of the housing.

[0013] As a preferred embodiment of this utility model, the bottom of the top cover is fixedly connected to an installation frame, and the side wall of the installation frame is provided with an annular installation groove, and the sealing gasket is installed in the installation groove.

[0014] As a preferred embodiment of this utility model, a bottom cover is fixedly connected to the bottom of the housing, and a plurality of support blocks are fixedly connected to the bottom of the top cover. The bottom of the battery module abuts against the top of the bottom cover, and the top of the battery module abuts against the bottom of the support blocks.

[0015] As a preferred embodiment of this utility model, a handle is fixedly connected to the top of the top cover.

[0016] As a preferred embodiment of this utility model, the housing is made of aluminum alloy.

[0017] Compared with the prior art, the present invention provides a battery module with the following advantages:

[0018] 1. In this battery module, a bracket is fixedly connected to the circuit board, and conductive connecting pieces are provided on the bracket. The electrodes of the battery cell are abutted and welded to the connecting pieces, which not only simplifies the electrical connection between the battery cells, but also enables quick assembly and disassembly, improving maintenance efficiency.

[0019] 2. In this battery box, by opening an annular groove on the sealing end face of the sealing gasket, not only can the vibration resistance and long-term compression stability be enhanced, but the annular groove can also absorb some dynamic stress, reduce permanent compression deformation of the material, maintain resilience for a long time, and ensure that the waterproof seal is durable and effective. It also improves the water pressure resistance. When external water pressure acts on the sealing structure, water may penetrate inward through tiny gaps. The annular groove can form a labyrinthine water-blocking path to improve the waterproof effect.

[0020] The parts not covered in this device are the same as or can be implemented using existing technologies. This utility model has the advantage of convenient installation of battery modules, improving maintenance efficiency. At the same time, the use of labyrinth-type sealing gaskets solves the problem of insufficient waterproof performance of battery boxes and can meet the requirements of electric motorcycles to adapt to various road conditions. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0022] Figure 1 This is a first-person perspective perspective view of the present invention.

[0023] Figure 2 This is a two-dimensional perspective view of the present invention.

[0024] Figure 3 This is a three-dimensional schematic diagram of the top cover of this utility model;

[0025] Figure 4 This is a cross-sectional view of the sealing gasket of this utility model;

[0026] Figure 5 This is a three-dimensional schematic diagram of the battery module of this utility model;

[0027] Figure 6 This is a three-dimensional schematic diagram of the bracket of this utility model;

[0028] Figure 7 This is a partial schematic diagram of the bracket of this utility model.

[0029] In the diagram: 1. Housing; 101. Fixing hole; 2. Top cover; 201. Handle; 202. Mounting slot; 203. Support block; 3. Connector; 4. Sealing gasket; 5. Battery cell; 6. Circuit board; 601. First connection end; 602. Second connection end; 603. Wiring harness; 7. Bracket; 701. Mounting hole; 8. Connecting piece; 801. Elastic guide piece; 802. Connecting piece. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example:

[0032] Reference Figures 5-7 A battery module includes a circuit board 6, on which multiple battery cells 5 are electrically connected. The number of battery cells 5 ranges from two to forty, preferably thirty-two. The battery cells 5 are connected according to a certain pattern (in series, parallel, or a combination of series and parallel, depending on the design goals of the battery pack, such as required voltage, capacity, and power). The module also includes brackets 7 for fixing the battery cells 5, detachably connected to both ends of the circuit board 6. Multiple battery cells 5 are located between two sets of brackets 7. A first connection end 601 is fixedly connected to the circuit board 6. Conductive connecting pieces 8 are fixedly connected to the brackets 7. The positive and negative terminals of the battery cells 5 are respectively soldered to the corresponding connecting pieces 8. A second connection end 602 is inserted into the first connection end 601. When the second connection end 602 is inserted into the first connection end 601, an electrical connection is established between the first connection end 601 and the second connection end 602. A wire harness 603 is fixedly connected to the second connection end 602. The wire harness 603 consists of multiple wires. The wires of the wire harness 603 are fixedly connected to the corresponding connecting pieces 8. In use, a bracket 7 is fixedly connected to the circuit board 6, and a conductive connecting piece 8 is provided on the bracket 7. The electrodes of the battery cell 5 are soldered to the connecting piece 8. This not only simplifies the electrical connection between the battery cells 5, but also enables quick assembly and disassembly, improving maintenance efficiency.

[0033] Reference Figure 6 The bracket 7 has a plurality of mounting holes 701, with thirty-two mounting holes 701 corresponding one to one of the battery cells 5. An elastic guide plate 801 extending into the mounting hole 701 is fixedly connected to the connecting piece 8. The electrodes of the battery cell 5 are abutted against the elastic guide plate 801 and fixed by welding. The connecting piece 8 and the elastic guide plate 801 are integrally formed, and the material is preferably copper sheet. In use, by fixing the elastic guide plate 801 to the connecting piece 8, the electrodes of the battery cell 5 are abutted against the corresponding elastic guide plate 801. Under the elastic action of the elastic guide plate 801, the battery cell 5 can be reliably connected to the connecting piece 8, improving the performance.

[0034] Reference Figure 5 and Figure 6 The top of the bracket 7 is placed against the bottom of the circuit board 6, and the bracket 7 is detached from the circuit board 6 by the first screw. By fixing the bracket 7 to the circuit board 6 with the first screw, it can be flexibly assembled and disassembled, improving maintenance efficiency.

[0035] Reference Figure 6 and Figure 7A wire groove is provided on the outer wall of the bracket 7, and the wires of the wire harness 603 are clamped and connected in the wire groove. In use, by opening a wire groove on the outer wall of the bracket 7, the wires can be fixed in the wire groove, which can not only arrange the wires in an orderly manner, but also reduce the shaking of the wires and improve the stability of the connection.

[0036] Reference Figure 7 A contact piece 802 is fixedly connected to the connecting piece 8. The contact piece 802 is integrally formed with the connecting piece 8. The wires of the wire harness 603 are electrically connected to the contact piece 802. Preferably, the wires are fixedly connected to the contact piece 802 by soldering to ensure the reliability of the wiring.

[0037] Reference Figures 1-4 A battery box includes a battery module, the specific structure of which is as described in the above embodiment. It also includes a housing 1 for accommodating the battery module. The housing 1 is made of aluminum alloy, grade 6061, which features high strength, corrosion resistance, and weldability. The housing 1 is a cylindrical structure extending vertically, and is produced using an aluminum profile extrusion molding process, allowing for length adjustment and reducing the number of molds required. A top cover 2 is detachably connected to the top of the housing 1. A connector 3 for charging and discharging the battery module is fixedly connected to the top cover 2, electrically connecting the connector 3 to a circuit board 6 to facilitate charging and discharging the battery module. The connector 3 is fixed to the top cover 2 by a third screw. A rubber gasket is fixed to the bottom of the connector 3 and the connection surface between it and the top cover 2 to increase the sealing effect at the connection point. A fixing hole 101 is provided on the top of the side wall of the housing 1. In use, a second screw is inserted into the fixing hole 101, which is flush with the side wall of the top cover 2. A threaded connection is used to detach the top cover 2 from the housing 1. A sealing gasket 4 is installed at the end of the top cover 2 that extends into the housing 1. Multiple annular grooves are formed on the side wall of the sealing gasket 4, with two to four grooves, preferably three, and a depth of 1 / 3 to 1 / 2 of the wall thickness of the sealing gasket 4. The opening end face of the annular groove abuts against the inner wall of the housing 1. By forming annular grooves on the sealing end face of the sealing gasket 4, not only can vibration resistance and long-term compression stability be enhanced, but the annular grooves can also absorb some dynamic stress, reduce permanent compression deformation of the material, maintain resilience for a long time, and ensure the waterproof seal is durable and effective. It also improves the water pressure resistance (especially in immersion or high-pressure water spray scenarios). When external water pressure acts on the sealing structure, water may penetrate inward through tiny gaps. The annular grooves can form a labyrinthine water-blocking path, extending the water penetration path and increasing flow resistance, which is equivalent to providing a secondary waterproof barrier. Even if there is slight disturbance to the main sealing surface, water will have difficulty penetrating quickly, thus improving the waterproof effect. Furthermore, an audible and visual alarm, model 7116k, is fixedly connected to the top cover 2. The audible and visual alarm is electrically connected to the circuit board 6. During the operation of the electric motorcycle, if the battery pack power is detected to be too low, the audible and visual alarm device installed on the top cover 2 can be triggered to promptly notify the user to charge the battery pack.

[0038] Reference Figure 3 and Figure 4 An installation frame is fixedly connected to the bottom of the top cover 2. The side wall of the installation frame has an annular installation groove 202. The sealing gasket 4 is installed in the installation groove 202. The installation frame has a serrated groove to facilitate connection with the box body 1. The top cover 2 has an annular installation groove 202 to facilitate the installation of the sealing gasket 4 and improve the assembly and disassembly effect.

[0039] Reference Figures 1-4 A bottom cover is fixedly connected to the bottom of the housing 1. The bottom cover is made of the same material as the housing 1. The bottom cover is preferably fixedly connected to the housing 1 by laser welding, which can improve the waterproof effect of the bottom of the housing 1. Multiple support blocks 203 are fixedly connected to the bottom of the top cover 2. There are two to six support blocks 203, preferably four, located at the four corners of the bottom of the top cover 2. During installation, the bottom of the battery module abuts against the top of the bottom cover, that is, the bottom of the bracket 7 abuts against the top of the bottom cover, and the top of the battery module abuts against the bottom of the support block 203. Preferably, the top of the bracket 7 abuts against the bottom of the support block 203, which can limit the pressure and prevent vibration caused by the electric motorcycle during operation.

[0040] Reference Figures 1-4 A handle 201 is fixedly connected to the top of the top cover 2 to facilitate the transfer of the battery.

[0041] Components not described in detail in this article are existing technologies.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery module comprising a circuit board (6) on which a plurality of battery cells (5) are electrically connected, characterized in that, It also includes a bracket (7) for fixing the battery cell (5), which is detachably connected to both ends of the circuit board (6). Among them, multiple battery cells (5) are located between two sets of brackets (7), and a first connection end (601) is fixedly connected to the circuit board (6). A connecting piece (8) for conducting electricity is fixedly connected to the bracket (7). The positive and negative poles of the battery cells (5) are respectively welded to the corresponding connecting pieces (8). A second connection end (602) is inserted into the first connection end (601). A wire harness (603) is fixedly connected to the second connection end (602). The wires of the wire harness (603) are fixedly connected to the corresponding connecting piece (8).

2. The battery module of claim 1, wherein The bracket (7) has multiple mounting holes (701), and the connecting piece (8) has an elastic guide piece (801) extending into the mounting hole (701) and the electrode of the battery cell (5) abuts against the elastic guide piece (801).

3. The battery module of claim 1, wherein, The top of the bracket (7) abuts against the bottom of the circuit board (6), and the bracket (7) is detached from the circuit board (6) by a first screw.

4. The battery module of claim 1, wherein, The bracket (7) has a wire groove on its outer wall, and the wires of the wire harness (603) are snapped into the wire groove.

5. The battery module of claim 1, wherein, A junction plate (802) is fixedly connected to the connecting piece (8), and the wires of the wire harness (603) are electrically connected to the junction plate (802).

6. A battery box comprising a battery module according to any one of claims 1 to 5, characterized in that It also includes a housing (1) for accommodating the battery module. The top of the housing (1) is detachably connected to a top cover (2), and a connector (3) for charging and discharging the battery module is fixedly connected to the top cover (2). A sealing gasket (4) is installed at one end of the top cover (2) extending into the housing (1). Multiple annular grooves are opened on the side wall of the sealing gasket (4), and the opening end face of the annular groove abuts against the inner wall of the housing (1).

7. The battery box of claim 6, wherein, The top cover (2) is fixedly connected to the bottom of the mounting frame, and the mounting frame has an annular mounting groove (202) on its side wall. The sealing gasket (4) is installed in the mounting groove (202).

8. The battery box of claim 6, wherein, The bottom of the housing (1) is fixedly connected to a bottom cover, and the bottom of the top cover (2) is fixedly connected to multiple support blocks (203). The bottom of the battery module abuts against the top of the bottom cover, and the top of the battery module abuts against the bottom of the support blocks (203).

9. The battery box of claim 6, wherein, The top of the cover (2) is fixedly connected to a handle (201).

10. The battery box of claim 6, wherein, The housing (1) is made of aluminum alloy.

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