Cylindrical battery cell close-packed structure

Abstract

The cylindrical battery cell close-packed structure comprises an upper cover plate, a lower cover plate, a battery cell bag arranged between the upper cover plate and the lower cover plate, and a welding layer arranged on the upper cover plate and connected with the battery cell bag, the battery cell pack comprises a plurality of groups of battery cell columns, the battery cell columns comprise the same number of battery cells which are linearly arranged, the battery cells of the adjacent battery cell columns are arranged in a staggered manner along the battery cell arrangement direction, and the battery cell columns arranged at intervals are symmetrically arranged relative to the battery cell columns among the battery cell columns. According to the utility model, the battery cells are arranged in a staggered manner, so that the internal space of the battery pack is utilized to the maximum extent, and the quantity and energy density of the battery cells in the battery pack per unit volume are improved.

Description

Technical Field

[0001] This utility model belongs to the field of battery manufacturing, and in particular relates to a structure of densely packed cylindrical cells. Background Technology

[0002] With the rapid development of renewable energy, electric vehicles, and portable electronic devices, the demand for efficient energy storage systems is increasing. Battery packs, as a core component of these applications, are assembled from multiple individual cells using specific structures and electrical connections to form a single unit with greater capacity and higher voltage output. This design not only provides higher energy density but also meets the power and energy requirements of different application scenarios through modular design.

[0003] In existing battery pack designs, cells are mostly arranged in a horizontal or vertical configuration, meaning they are laid out upright or flat. This arrangement is typically for ease of manufacturing and assembly, and also facilitates heat dissipation management. For prismatic or pouch cells, this layout makes better use of space and simplifies the electrical connection design in the battery management system (BMS).

[0004] However, traditional horizontal and vertical battery cell arrangements have some significant limitations. Firstly, in terms of space utilization, the need to allow sufficient clearance for electrical connections and heat dissipation between cells results in low overall space efficiency. This is particularly true for applications requiring small size but high cell density, such as small drones and smart wearable devices, where traditional arrangements often fail to meet the demands of compact design. Furthermore, to ensure safety and heat dissipation, existing arrangements may require additional structural support and cooling systems, further increasing the size and weight of the battery pack, thus impacting the overall system efficiency and range.

[0005] In conclusion, while horizontal and vertical arrangement methods meet the needs of some products in the current market to a certain extent, the resulting space waste and design complexity are problems that urgently need to be solved for applications that pursue higher integration and smaller size. Utility Model Content

[0006] The purpose of this invention is to provide a structure for densely packed cylindrical cells to solve the technical problem of tightly arranging cylindrical cells within a battery pack.

[0007] To achieve the above objectives, the specific technical solution of this utility model for a densely packed cylindrical battery cell structure is as follows:

[0008] A structure for densely packed cylindrical battery cells includes an upper cover plate and a lower cover plate, a battery cell pack disposed between the upper cover plate and the lower cover plate, and a welding layer disposed on the upper cover plate and connected to the battery cell pack.

[0009] The battery pack includes several battery cell columns, each containing the same number of cells arranged in a straight line. The cells in adjacent battery cell columns are staggered along the cell arrangement direction, and the spaced-apart battery cell columns are symmetrically arranged relative to the battery cell columns in between.

[0010] As a further improvement of this utility model, the battery cell is cylindrical.

[0011] As a further improvement of this utility model, the upper cover plate and the lower cover plate are rectangular, and the battery cells of the battery cell row are arranged along the long side of the rectangle.

[0012] As a further improvement of this utility model, the battery cell is placed in contact with the surface of the adjacent battery cell.

[0013] As a further improvement of this utility model, the welding layer includes a plurality of welding nickel sheets, which are arranged corresponding to a plurality of the battery cells to realize the electrical connection between the battery cells.

[0014] As a further improvement of this utility model, a positioning pin is provided on the side of the upper cover plate facing the welding layer, and a welding positioning hole is provided on the welding nickel sheet corresponding to the positioning pin. The welding positioning hole passes through the positioning pin to realize the installation of the welding nickel sheet on the upper cover plate.

[0015] As a further improvement of this utility model, the upper cover plate is provided with welding holes corresponding to the battery cell for connecting the welding nickel sheet to the battery cell.

[0016] As a further improvement of this utility model, the welding nickel sheet is provided with a connecting end corresponding to the welding hole, and the connecting end passes through the welding hole and connects to the battery cell.

[0017] As a further improvement of this utility model, a terminal is provided on one side of the welded nickel sheet, and the terminal extends outward and protrudes from the side of the upper cover plate for connection to external circuits.

[0018] As a further improvement of this utility model, the terminal is connected to the battery management system via a data acquisition line to feed back the real-time parameters of the battery cell to the battery management system.

[0019] Beneficial effects:

[0020] By staggering the battery cell rows and making the spaced-out battery cell rows symmetrical with respect to adjacent battery cell rows, this invention can maximize the use of limited space, and is especially suitable for applications with strict size restrictions, such as portable electronic products, drones and other small mobile devices.

[0021] The design of the top and bottom covers not only provides physical protection for the battery cells but also enhances the mechanical strength of the entire battery pack. Meanwhile, the presence of the welded layers ensures the robustness of the connections between the cells, preventing connection failures caused by vibration or impact.

[0022] The welding positioning holes on the nickel plate and the positioning pins on the top cover plate work together to achieve rapid and precise installation positioning. At the same time, the design of the welding holes and connecting ends simplifies the welding process, improves production efficiency, and reduces manufacturing costs. The design of the nickel plate ensures a low-resistance electrical connection, reduces energy loss, and improves power transmission efficiency. Furthermore, the terminals extend outwards and protrude from the side of the top cover plate, facilitating safe and reliable connection to external circuits.

[0023] The terminal is directly connected to the battery management system (BMS) via a data acquisition line, which can monitor the working status of each cell in real time, including key parameters such as voltage and temperature, thereby improving the system's intelligence level and maintenance convenience.

[0024] This invention is particularly suitable for cylindrical battery cells, and the number and arrangement of the cells can be flexibly adjusted according to specific application scenarios to meet different power and capacity requirements while maintaining a compact structure and high efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a densely packed cylindrical battery cell structure according to the present invention;

[0026] The markings in the diagram are as follows: 1. Lower cover plate; 2. Battery cell pack; 3. Upper cover plate; 31. Positioning pin; 32. Welding hole; 4. Welding layer; 41. Welding nickel sheet; 411. Connecting section; 412. Terminal; 42. Welding positioning hole. Detailed Implementation

[0027] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0028] Implementation example:

[0029] like Figure 1 The structure shown uses cylindrical cells in a close-packed arrangement. The cell pack 2 is sandwiched between the upper cover plate 3 and the lower cover plate 1, and the welding layer 4 covers the outside of the upper cover plate 3 to realize the electrical connection of the cell pack 2.

[0030] In this embodiment, the cell pack 2 includes six rows of cells. The cells are arranged linearly along the long side of the rectangular lower cover (the top-to-bottom row of cells in the figure), with the cells placed close together. From right to left, these are the first, ..., sixth cell rows. Cells in adjacent rows are staggered vertically with their adjacent cells. The horizontal positions of odd and even rows are the same. The first and third rows are symmetrically arranged relative to the second row, and so on. This honeycomb-like staggered arrangement utilizes the space within the battery pack more efficiently, reducing unnecessary gaps. Especially when installing as many cells as possible within a limited space, it significantly increases the number of cells per unit volume, thereby improving the energy density of the battery pack. It also increases the mutual support between the cells, making the entire battery pack structure more stable. Even under vibration or impact, it effectively prevents cell displacement, reducing the risk of failure due to physical damage.

[0031] The upper cover plate 3 covers the cell pack 2, and has an installation groove on its outer side for placing the welding layer 4. A through welding hole 32 is provided in the installation groove corresponding to the cell, and a positioning pin 31 protrudes towards the welding layer 4. The welding layer 4 consists of several welding nickel sheets 41, which are fitted with the positioning pins through the welding positioning holes 42 to achieve installation on the upper cover plate 3. A connecting end 411 protrudes from the welding nickel sheet 41 towards the upper cover plate 3. The connecting end 411 matches the size of the welding hole 32 and passes through the welding hole 32 to connect with the cell. A wiring terminal 412 is bent on the side of the welding nickel sheet 41 and extends from the side of the upper cover plate 3. The wiring terminal 412 realizes the electrical connection between the cell and the external circuit. In this embodiment, the wiring terminal 412 is connected to the battery management system to realize real-time monitoring of key parameters such as voltage, current, and temperature of each cell. This allows the system to obtain battery status information in a timely manner, ensuring that it operates under optimal conditions. When an abnormal situation is detected (such as excessively high temperature, voltage imbalance, etc.), the BMS can quickly take protective measures through the wiring terminals, such as cutting off the circuit or issuing an alarm, thereby avoiding potential safety hazards.

[0032] This invention, by staggering the arrangement of battery cells, minimizes internal gaps and increases the number of cells and energy density per unit volume. It is particularly suitable for applications with strict requirements on size and weight, and performs excellently in improving space utilization, optimizing thermal management, enhancing mechanical stability, simplifying electrical connections, and integrating intelligent monitoring. It provides an innovative and efficient solution for modern high-performance battery pack design and has a significant competitive advantage over existing technologies.

[0033] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A structure for densely packed cylindrical battery cells, characterized in that, It includes an upper cover plate and a lower cover plate, a battery cell pack disposed between the upper cover plate and the lower cover plate, and a welding layer disposed on the upper cover plate and connected to the battery cell pack; The battery pack includes several battery cell columns, each containing the same number of cells arranged in a straight line. The cells in adjacent battery cell columns are staggered along the cell arrangement direction, and the spaced-apart battery cell columns are symmetrically arranged relative to the battery cell columns in between.

2. The cylindrical cell densely packed structure according to claim 1, characterized in that, The battery cell is cylindrical.

3. The cylindrical cell densely packed structure according to claim 1, characterized in that, The upper cover plate and the lower cover plate are rectangular, and the cells of the cell array are arranged along the long side of the rectangle.

4. The cylindrical cell densely packed structure according to claim 2, characterized in that, The battery cell is placed in contact with the surface of the adjacent battery cell.

5. The structure of densely packed cylindrical cells according to claim 1, characterized in that, The welding layer includes a plurality of welding nickel sheets, which are arranged corresponding to a plurality of the battery cells to realize the electrical connection between the battery cells.

6. The cylindrical cell densely packed structure according to claim 5, characterized in that, The upper cover plate is provided with a positioning pin on the side facing the welding layer, and the welding nickel sheet is provided with a welding positioning hole corresponding to the positioning pin. The welding positioning hole passes through the positioning pin to realize the installation of the welding nickel sheet on the upper cover plate.

7. The cylindrical cell densely packed structure according to claim 6, characterized in that, The upper cover plate is provided with welding holes corresponding to the battery cell for connecting the welding nickel sheet to the battery cell.

8. The cylindrical cell densely packed structure according to claim 7, characterized in that, The welding nickel sheet is provided with a connecting end corresponding to the welding hole, and the connecting end passes through the welding hole and connects to the battery cell.

9. The cylindrical cell densely packed structure according to claim 8, characterized in that, A terminal is provided on one side of the welded nickel sheet, and the terminal extends outward from the side of the upper cover plate for connection to external circuits.

10. The cylindrical cell densely packed structure according to claim 9, characterized in that, The terminal is connected to the battery management system via a data acquisition line, and the real-time parameters of the battery cell are fed back to the battery management system.

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