Long and narrow lithium battery

Abstract

The utility model discloses a long and narrow lithium battery. The long and narrow lithium battery comprises a battery shell, the battery module is arranged in the battery shell, the battery module comprises a plurality of lithium cells which are sequentially connected in series, the plurality of lithium cells are arranged in groups to form a plurality of cell groups, and the same integrated cover plate is arranged at the pole ends of the adjacent cell groups on the same side; the integrated cover plate is provided with a plurality of connecting sheets for connecting the lithium cells in series; the connecting piece of the integrated cover plate is further provided with a power connection head, the power connection head is provided with a branch line, one section of the branch line is embedded in the integrated cover plate, and the other section of the branch line extends out of the integrated cover plate. According to the utility model, through the arrangement of the integrated cover plate, on the basis that the lithium battery cores are connected in series, the voltage sampling lines are embedded in the integrated cover plate, so that the occupied space of the voltage sampling lines can be effectively reduced, and the whole battery module is more compact and efficient; and due to the embedded design, the appearance of the battery module is neater and more attractive, no messy wires are exposed, and the visual effect of the product can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of lithium battery technology, and in particular relates to a narrow and elongated lithium battery. Background Technology

[0002] The main function of the voltage sampling line in a lithium battery is to transmit the voltage information of each cell to the protection board. Based on this information, the BMS monitors the status of the entire battery pack and takes necessary measures to protect the battery. For example, when the voltage of a cell is too high (approaching overcharge) or too low (approaching over-discharge), the BMS can cut off the charging or discharging circuit to prevent further damage to the cell.

[0003] In existing lithium battery packs, the sampling wires are led out from each cell without a pre-defined path or fixed point, which easily leads to the wires being randomly arranged inside the battery pack. This makes it difficult to keep the wires neat during installation. Furthermore, handling a large number of independent sampling wires during assembly is both time-consuming and prone to errors, increasing the assembly difficulty and error rate. Utility Model Content

[0004] This utility model addresses the problems in the prior art by proposing the following technical solution:

[0005] This utility model provides a narrow and elongated lithium battery, comprising:

[0006] Battery casing;

[0007] A battery module is disposed inside a battery casing. The battery module includes multiple lithium battery cells connected in series. The multiple lithium battery cells are grouped and arranged to form multiple cell groups. The terminal ends of adjacent cell groups on the same side are provided with the same integrated cover plate.

[0008] The integrated cover plate is provided with connecting pieces for multiple series-connected lithium battery cells.

[0009] The connecting piece of the integrated cover plate is also provided with a power connector, and the power connector is provided with a branch line. One end of the branch line is embedded in the integrated cover plate, and the other end extends out of the integrated cover plate.

[0010] As a preferred embodiment of the above technical solution, multiple branch lines converge into a wire harness inside the integrated cover plate.

[0011] As a preferred embodiment of the above technical solution, the branch line extends out of the integrated cover plate to form a bus.

[0012] As a preferred embodiment of the above technical solution, the battery cells on different sides are connected by a set connection for electrical discharge.

[0013] As a preferred embodiment of the above technical solution, the lithium battery cell located at the beginning of the series path in the battery module is the first battery cell, and the lithium battery cell located at the end of the series path in the battery module is the second battery cell. Both the positive terminal of the first battery cell and the negative terminal of the second battery cell are electrically connected to a busbar, which is used to connect the battery module to an external device.

[0014] The beneficial effects of this utility model are as follows:

[0015] This utility model, through the integrated cover plate, embeds the sampling lines within the series connection of each lithium battery cell, effectively reducing the space occupied by the sampling lines and making the entire battery module more compact and efficient. The embedded design makes the battery module look cleaner and more aesthetically pleasing, with no messy exposed wires, which enhances the product's visual appeal. In addition, the neat and orderly internal wiring facilitates subsequent maintenance and repair work. Attached Figure Description

[0016] Figure 1 The diagram shown is an overall schematic of the lithium battery in the embodiment;

[0017] Figure 2 The diagram shown is a schematic of the lithium battery cell module in the embodiment;

[0018] Figure 3 The diagram shown is a schematic of the integrated cover plate of the lithium battery in the embodiment;

[0019] Figure 4 The diagram shown is a schematic diagram of the internal branch line arrangement of the integrated cover plate in the embodiment;

[0020] Reference numerals: 10, battery casing; 20, lithium battery cell; 21, first battery cell; 22, second battery cell; 30, integrated cover plate; 31, connecting piece; 32, connecting bar; 33, busbar; 41, connector; 42, branch line; 43, wire harness; 44, main line. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0022] Example

[0023] like Figure 1 , Figure 2 , Figure 3 As shown, Figure 1 The diagram shown is an overall schematic of the lithium battery in the embodiment; Figure 2 The diagram shown is a schematic of the lithium battery cell module in the embodiment; Figure 3 The diagram shown is a schematic of the integrated cover plate of the lithium battery in the embodiment;

[0024] The device includes a battery casing 10 and a battery module disposed within the battery casing 10. The battery module includes multiple lithium battery cells 20 connected in series. The multiple lithium battery cells 20 are grouped and arranged to form multiple cell groups. The terminal ends of adjacent cell groups on the same side are provided with the same integrated cover plate 30. The integrated cover plate 30 is provided with connecting pieces 31 for multiple series-connected lithium battery cells 20.

[0025] The multiple cell groups formed by grouping can make full use of the space inside the battery case 10, making the overall structure of the lithium battery module more compact and forming a long and narrow shape.

[0026] Specifically, the end of the lithium battery cell 20 with the terminal post is called the terminal post end. In this embodiment, there are a total of sixteen lithium battery cells 20, forming four cell groups. The terminal posts of the two cell groups on the same side face the same direction and are provided with integrated cover plates 30. The terminal posts of the cell groups on both sides are arranged close to each other.

[0027] Multiple connecting pieces 31 are provided on the integrated cover plate 30 for connecting each lithium battery cell 20 in series.

[0028] like Figure 4 As shown, Figure 4 The diagram shown is a schematic diagram of the internal branch line arrangement of the integrated cover plate in the embodiment;

[0029] The connecting piece 31 of the integrated cover plate 30 is provided with a power connector 41, and a branch line 42 is provided on the power connector 41. One end of the branch line 42 is embedded in the integrated cover plate 30, and the other end extends out of the integrated cover plate 30.

[0030] Multiple branch lines 42 converge into a wire harness 43 inside the integrated cover plate 30, and the branch lines 42 extend out of the integrated cover plate 30 to form a bus 44.

[0031] Branch line 42 is the voltage sampling line, used to monitor the voltage status of each lithium battery cell 20 to ensure the safe and efficient operation of the battery pack. The branch lines 42 inside the integrated cover plate 30 are combined into a wire harness 43 to further arrange and fix each branch line 42 in a reasonable manner. The bus 44 further concentrates the wire harness 43 and summarizes all the voltage sampling information, which facilitates connection with external devices (such as battery management system BMS) to realize the status monitoring and management of the entire battery module.

[0032] By embedding the sampling line within the integrated cover plate 30, the space occupied by the sampling line can be effectively reduced, making the entire battery module more compact and efficient. The embedded design makes the battery module look cleaner and more aesthetically pleasing, with no messy exposed wires, which can improve the visual effect of the product. In addition, the neat and orderly internal wiring facilitates subsequent maintenance and repair work.

[0033] like Figure 2 , Figure 3As shown, Figure 2 The diagram shown is a schematic of the lithium battery cell module in the embodiment; Figure 3 The diagram shown is a schematic of the integrated cover plate of the lithium battery in the embodiment;

[0034] The battery cells on different sides are electrically connected through a connection bar 32.

[0035] The lithium battery cell 20 located at the beginning of the series path in the battery module is the first battery cell 21, and the lithium battery cell 20 located at the end of the series path in the battery module is the second battery cell 22. Both the positive terminal of the first battery cell 21 and the negative terminal of the second battery cell 22 are electrically connected to a busbar 33, which is used to connect the battery module to an external device.

[0036] The connection bar 32 and the busbar 33 enable the connection between the two battery cell groups and the connection between the entire battery module and external devices.

[0037] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. An elongated lithium battery, characterized by, The application relates to a battery module. The battery module comprises a battery shell (10), a battery module arranged in the battery shell (10), a plurality of lithium cells (20) arranged in series, a plurality of lithium cell groups formed by the lithium cells (20), and a same integrated cover plate (30) arranged at the pole end of the lithium cell groups on the same side. The integrated cover plate (30) is provided with a plurality of connecting pieces (31) of the lithium cells (20) arranged in series. The connecting piece (31) of the integrated cover plate (30) is further provided with a connecting head (41), the connecting head (41) is provided with a branch line (42), one end of the branch line (42) is embedded in the integrated cover plate (30), and the other end of the branch line (42) extends out of the integrated cover plate (30). The plurality of branch lines (42) are gathered into a wire harness (43) inside the integrated cover plate (30).

2. The elongated lithium battery of claim 1, wherein, The branch line (42) extends out of the integrated cover plate (30) to form a bus (44).

3. The elongated lithium battery of claim 2, wherein, The lithium cell groups on different sides are electrically connected through the arranged connecting rows (32).

4. The elongated lithium battery of claim 1, wherein, The lithium cell (20) located at the head of the series connection path in the battery module is a first lithium cell (21), the lithium cell (20) located at the tail of the series connection path in the battery module is a second lithium cell (22), the positive pole of the first lithium cell (21) and the negative pole of the second lithium cell (22) are both electrically connected with a busbar (33), and the busbar (33) is used for connecting the battery module with external equipment.

5. The elongated lithium battery of claim 1, wherein, ​

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