A novel cylindrical cell battery pack module structure with end-plate-free mounting

Abstract

This utility model relates to the field of battery module technology, and in particular to a novel cylindrical cell battery pack module structure that eliminates the need for end plate mounting. The structure includes a battery pack containing battery modules. Positioning bases are symmetrically fixed to both sides of the bottom of the battery pack. Connecting lugs are fixed to the four corners of each battery module. Module mounting holes are vertically aligned on the positioning bases and connecting lugs, with connecting bolts threaded into these holes. This utility model directly connects the battery modules to the battery pack by screwing the connecting bolts into the vertically aligned module mounting holes on the connecting lugs and positioning bases. This completely eliminates the traditional end plate connection method, reducing the use of metal materials, lowering the overall weight and production cost of the battery pack, and freeing up more space after removing the end plates. This allows for more cylindrical cells to be accommodated, increasing the overall capacity and output power of the battery pack and improving space utilization.

Description

Technical Field

[0001] This utility model relates to the field of battery module technology, and in particular to a novel module structure for cylindrical cell battery packs that does not require end plate mounting. Background Technology

[0002] In the field of cylindrical cell battery packs, end-plate mounting technology is a common application. For example, Chinese patents with announcement numbers "CN210956773U: A Cylindrical Cell Battery Module Structure" and "CN215816115U: A Cylindrical Battery Module Mounting Structure" disclose cylindrical cell battery module structures that use end plates for fixing. The end plates are used to position and fix the cell modules to ensure the structural stability of the battery modules.

[0003] However, in applications such as new energy vehicles where battery energy density and space utilization are extremely critical, this technology has revealed numerous problems. From a weight perspective, end plates are typically made of metal, making them quite heavy and increasing the overall weight of the battery pack, thus increasing the vehicle's load and reducing its range. In terms of cost, the production, processing, and installation of end plates require significant manpower and material resources. Furthermore, the presence of end plates complicates the internal structure of the battery pack, increasing assembly steps and reducing production efficiency. Regarding space utilization, end plates occupy space within the battery pack, limiting the number of cells that can be arranged. In compact battery packs, the space occupied by end plates reduces the number of cells, thus affecting the overall capacity and output power of the battery pack. For example, in some portable energy storage products or lightweight power battery packs, the presence of end plates prevents the battery pack from accommodating more cells, making it difficult to meet users' demands for high-capacity energy storage. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a novel cylindrical cell battery pack module structure that eliminates the need for end-plate mounting, thus solving the significant technical problems of traditional battery modules with end-plate mounting technology in terms of weight, cost, and space utilization.

[0005] To solve the above technical problems, this utility model provides the following technical solution: a novel cylindrical cell battery pack module structure without end plate installation, including a battery pack, in which a battery module is installed, a positioning base frame is symmetrically fixed to both sides of the bottom of the battery pack, and a connecting ear plate is fixed to each of the four corners of the battery module. The positioning base frame and the connecting ear plate are vertically correspondingly provided with module mounting holes, and connecting bolts are threaded into the module mounting holes.

[0006] A further improvement is that the battery module includes a module bracket one and a module bracket two, with a plurality of cylindrical battery cells installed between the module bracket one and the module bracket two. Conductive connectors are installed on the cylindrical battery cells, and the conductive connectors are attached to the outside of the module bracket two. Fastening bolts are threaded onto both the module bracket one and the module bracket two, and module buffer pads are installed at the bottom of both the module bracket one and the module bracket two.

[0007] A further improvement is that both module bracket one and module bracket two are made of lightweight, high-strength plastic material.

[0008] A further improvement is that the inner sides of module bracket one and module bracket two are symmetrically provided with positioning grooves adapted to cylindrical battery cells.

[0009] A further improvement is that positioning posts and fitting posts are staggered on the inner sides of both module bracket one and module bracket two, and the positioning posts and fitting posts installed on the inner sides of module bracket one and module bracket two are mutually fitted together.

[0010] A further improvement is that the conductive connector is made of a highly conductive material and is connected to the positive and negative terminals of the cylindrical battery cell by laser welding.

[0011] By employing the above technical solution, this utility model provides a novel cylindrical cell battery pack module structure that eliminates the need for end-plate mounting, which has at least the following beneficial effects:

[0012] 1. This utility model directly connects the battery module to the battery pack by screwing the connecting bolts into the vertically corresponding module mounting holes on the connecting ear plate and the positioning base. This completely eliminates the traditional connection method through the end plate structure, reduces the use of metal materials, lowers the overall weight and production cost of the battery pack, and frees up more space after removing the end plate, which can accommodate more cylindrical cells, increasing the overall capacity and output power of the battery pack and improving space utilization.

[0013] 2. The module bracket of this utility model adopts a lightweight, high-strength plastic material integrated end plate mounting hole method to realize the installation of the battery cell module, making the installation more convenient. Furthermore, the module bracket one and module bracket two are connected by fastening bolts, which improves the mechanical strength and overall stability of the battery module. Attached Figure Description

[0014] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the independent structure of the battery module of this utility model;

[0018] Figure 3 This is a schematic diagram of the disassembled battery module structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the module bracket and its structure according to the present invention;

[0020] Figure 5 This is a schematic diagram of the electrical connection structure of adjacent cylindrical battery cells according to this utility model.

[0021] In the diagram: 1. Battery pack; 2. Battery module; 3. Positioning base; 4. Connecting ear plate; 5. Module mounting hole; 6. Connecting bolt;

[0022] 21. Module bracket one; 22. Module bracket two; 23. Cylindrical battery cell; 24. Conductive connector; 25. Fastening bolt; 26. Module buffer pad;

[0023] 27. Positioning groove; 28. Positioning post; 29. ​​Fitting post. Detailed Implementation

[0024] 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.

[0025] Addressing the issues of traditional battery modules with endplate mounting technology, such as large weight, relatively high cost, and low space utilization, this embodiment provides a novel cylindrical cell battery pack module structure that eliminates the need for endplate mounting. This enables endplate-free mounting, thereby reducing battery module weight, lowering production costs, and improving space utilization. Please refer to... Figures 1-5 The novel cylindrical cell battery pack module structure without end plate installation includes a battery pack 1, a battery module 2 installed inside the battery pack 1, positioning base frames 3 symmetrically fixed to both sides of the bottom of the battery pack 1, connecting ear plates 4 fixed to the four corners of the battery module 2, and module mounting holes 5 vertically corresponding to the positioning base frames 3 and connecting ear plates 4, with connecting bolts 6 threaded into the module mounting holes 5.

[0026] By screwing the connecting bolts 6 into the vertically corresponding module mounting holes 5 on the connecting ear plate 4 and the positioning base 3, the battery module 2 is directly connected to the battery pack 1, completely eliminating the traditional connection method through the end plate structure. This reduces the use of metal materials, lowers the overall weight and production cost of the battery pack 1, and frees up more space after removing the end plates, allowing more cylindrical cells 23 to be accommodated, increasing the overall capacity and output power of the battery pack 1 and improving space utilization.

[0027] The battery module 2 includes a module bracket 1 21 and a module bracket 22. Several cylindrical cells 23 are installed between the module bracket 1 21 and the module bracket 22. Conductive connectors 24 are installed on the cylindrical cells 23 and are attached to the outside of the module bracket 22. Fastening bolts 25 are threaded onto both the module bracket 1 21 and the module bracket 22. Module buffer pads 26 are installed at the bottom of both the module bracket 1 21 and the module bracket 22. The module buffer pads 26 play a role in buffering and shock absorption, protecting the battery module 2 in the battery pack 1 from vibration and impact during transportation and use.

[0028] To further reduce the overall weight of the battery module 2, both module bracket 1 21 and module bracket 22 in the device are made of lightweight, high-strength plastic material, thereby reducing the overall weight of the battery module 2 and lowering production costs.

[0029] To improve the stability of the cylindrical battery cell 23 during installation, the inner sides of the module bracket 1 21 and module bracket 22 in this device are symmetrically provided with positioning grooves 27 that are adapted to the cylindrical battery cell 23. The two ends of the cylindrical battery cell 23 are placed in the positioning grooves 27 opened on the module bracket 1 21 and module bracket 22 respectively, and they are limited and fixed, thereby preventing the cylindrical battery cell 23 from being damaged by vibration and collision.

[0030] To improve the overall stability of the device, positioning posts 28 and fitting posts 29 are staggered on the inner sides of both module bracket 1 21 and module bracket 22. The positioning posts 28 and fitting posts 29 on the inner sides of module bracket 1 21 and module bracket 22 are fitted together. The corresponding positioning posts 28 and fitting posts 29 on module bracket 1 21 and module bracket 22 facilitate quick positioning and assembly. After the positioning posts 28 and fitting posts 29 on module bracket 1 21 and module bracket 22 are inserted into each other, they are then locked and fixed by fastening bolts 25, thereby improving the mechanical strength and overall stability of the device.

[0031] The conductive connector 24 is made of highly conductive material and is connected to the positive and negative poles of the cylindrical cell 23 by laser welding to realize the electrical connection between the cylindrical cells 23 and form the electrical circuit of the battery module 2.

[0032] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel cylindrical cell battery pack module structure without end-plate mounting, comprising a battery pack (1), characterized in that: The battery pack (1) is equipped with a battery module (2). A positioning base frame (3) is symmetrically fixed on both sides of the bottom of the battery pack (1). A connecting ear plate (4) is fixed at each of the four corners of the battery module (2). A module mounting hole (5) is vertically opened on the positioning base frame (3) and the connecting ear plate (4). A connecting bolt (6) is threaded into the module mounting hole (5).

2. The module structure of a novel cylindrical cell battery pack without end plate mounting according to claim 1, characterized in that: The battery module (2) includes a module bracket one (21) and a module bracket two (22). Several cylindrical cells (23) are installed between the module bracket one (21) and the module bracket two (22). A conductive connector (24) is installed on the cylindrical cell (23), and the conductive connector (24) is attached to the outside of the module bracket two (22). Fastening bolts (25) are threaded on both the module bracket one (21) and the module bracket two (22). Module buffer pads (26) are installed at the bottom of both the module bracket one (21) and the module bracket two (22).

3. The module structure of a novel cylindrical cell battery pack without end-plate mounting according to claim 2, characterized in that: Both module bracket one (21) and module bracket two (22) are made of lightweight high-strength plastic material.

4. The module structure of a novel cylindrical cell battery pack without end plate mounting according to claim 2, characterized in that: The inner sides of the first module bracket (21) and the second module bracket (22) are symmetrically provided with positioning grooves (27) that are adapted to the cylindrical battery cell (23).

5. The module structure of a novel cylindrical cell battery pack without end plate mounting according to claim 2, characterized in that: The inner sides of both module bracket one (21) and module bracket two (22) are staggered with positioning posts (28) and fitting posts (29), and the positioning posts (28) and fitting posts (29) installed on the inner sides of module bracket one (21) and module bracket two (22) are fitted together in a corresponding manner.

6. The module structure of a novel cylindrical cell battery pack without end plate mounting according to claim 2, characterized in that: The conductive connector (24) is made of a highly conductive material and is connected to the positive and negative poles of the cylindrical battery cell (23) by laser welding.

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