Long straight battery pack

Abstract

The utility model relates to a long straight battery pack, which comprises a plurality of battery cell groups and a protective plate for mounting the plurality of battery cell groups, the adjacent battery cell groups are separated by insulating partitions, the battery cell groups are connected in parallel, and each battery cell group comprises a plurality of battery cells connected in series; a battery pack sleeve film is sleeved outside the long straight battery pack; the positive electrode and the negative electrode of each battery cell are respectively connected with a nickel sheet, the nickel sheets of the positive electrode and the negative electrode of the adjacent battery cells are connected, the two ends of each battery cell are respectively provided with a negative electrode insulating sheet and a positive electrode insulating sheet, and the adjacent battery cells are separated by the negative electrode insulating sheet and the positive electrode insulating sheet. According to the utility model, the serial connection through holes, the parallel connection through holes I and the parallel connection through holes II are arranged on the protection plate, so that serial connection and parallel connection circuits can be integrated on the protection plate, additional materials required by serial connection and parallel connection can be saved, and meanwhile, space is saved to beautify products.

Description

Technical Field

[0001] The utility model relates to a long and straight battery pack. Background Art

[0002] In the design of lithium battery systems, it is necessary to consider the series and parallel connections between batteries. At the same time, the spatial dimensions of the product need to be considered. In addition, the appearance of the product also needs to be taken into account. Commonly, the series and parallel connections between batteries are mostly made by using materials such as copper-aluminum bars, nickel sheets, and cables. In products with special shape requirements, using these materials for the series and parallel connections between batteries not only results in a complex structure and occupies a large space, but also the appearance effect of the product is poor.

[0003] To solve the above problems, the present utility model is hereby proposed. Summary of the Utility Model

[0004] The purpose of the present utility model is to provide a long and straight battery pack.

[0005] The above purpose is achieved by the following technical solutions:

[0006] A long and straight battery pack includes several groups of battery cell groups and a protection board for installing several groups of battery cell groups. Adjacent battery cell groups are separated by an insulating partition. The battery cell groups are connected in parallel, and each battery cell group includes several serially connected battery cells.

[0007] Furthermore, the long and straight battery pack is externally sleeved with a battery pack film.

[0008] Preferably, nickel sheets are respectively connected to the positive and negative electrodes of the battery cells. The nickel sheets of the positive and negative electrodes of adjacent battery cells are connected to each other. Negative electrode insulating sheets and positive electrode insulating sheets are respectively arranged at both ends of the battery cells, and the negative electrode insulating sheets and positive electrode insulating sheets isolate adjacent battery cells.

[0009] Furthermore, the protection board is provided with a series connection through hole, a first parallel connection through hole, and a second parallel connection through hole. The nickel sheets of the positive and negative electrodes of adjacent battery cells in the battery cell group pass through the series connection through hole and are connected in series together. The first parallel connection through hole and the second parallel connection through hole are used for leading out the nickel sheets of the positive or negative electrode of the battery cell group, and the nickel sheets led out from the first parallel connection through hole and the second parallel connection through hole are connected in parallel.

[0010] Advantageous Technical Effects:

[0011] By providing a series connection through hole, a first parallel connection through hole, and a second parallel connection through hole on the protection board, the present utility model can integrate the series and parallel circuits on the protection board, which can save the additional materials required for series and parallel connections, and at the same time save space and beautify the product. Brief Description of the Drawings

[0012] The present utility model will be further described below with reference to the drawings.

[0013] Figure 1Schematic diagram of a long and straight battery pack with a battery pack sleeve film provided for the present utility model.

[0014] Figure 2 Schematic diagram of the long and straight battery pack structure of the present utility model.

[0015] Figure 3 Explosion diagram of the long and straight battery pack of the present utility model.

[0016] Figure 4 For Figure 3 Partial enlarged schematic diagram of A.

[0017] Figure 5 For Figure 3 Partial enlarged schematic diagram of B.

[0018] Figure 6 For Figure 3 Partial enlarged schematic diagram of C.

[0019] Figure 7 For Figure 3 Partial enlarged schematic diagram of D.

[0020] Figure 8 For Figure 3 Partial enlarged schematic diagram of E.

[0021] Each label in the figure is: 1, negative electrode insulating sheet; 2, nickel sheet; 3, battery cell; 4, positive electrode insulating sheet; 5, protection board; 51, series connection through hole; 52, parallel connection through hole one; 53, parallel connection through hole two; 6, insulating partition. Specific embodiments

[0022] Referring to Figures 1-8 As shown, a long and straight battery pack includes several groups of battery cell groups and a protection board 5 for installing several groups of battery cell groups. Adjacent battery cell groups are separated by an insulating partition 6. The battery cell groups are connected in parallel, and each battery cell group includes several serially connected battery cells 3.

[0023] The long and straight battery pack is externally sleeved with a battery pack sleeve film.

[0024] The positive and negative electrodes of the battery cell 3 are respectively connected with nickel sheets 2. The nickel sheets 2 of the positive and negative electrodes of adjacent battery cells 3 are connected. Negative electrode insulating sheets 1 and positive electrode insulating sheets 4 are respectively arranged at both ends of the battery cell 3, and the negative electrode insulating sheet 1 and the positive electrode insulating sheet 4 isolate the adjacent battery cells 3.

[0025] The protection board 5 is provided with a series connection through hole 51, a parallel connection through hole one 52 and a parallel connection through hole two 53. The nickel sheets 2 of the positive and negative electrodes of adjacent battery cells 3 in the battery cell group pass through the series connection through hole 51 and are connected in series. The parallel connection through hole one 52 and the parallel connection through hole two 53 are used for leading out the nickel sheets 2 of the positive or negative electrodes of the battery cell group, and at the same time, the nickel sheets 2 led out from the parallel connection through hole one 52 and the parallel connection through hole two 53 are connected in parallel.

[0026] The parallel connection method is to fold and flatten the nickel sheets 2 led out from the parallel through holes 52 and 53.

[0027] In the utility model, by arranging the series through holes 51, the first parallel through holes 52 and the second parallel through holes 53 on the protection board 5, the series-parallel connection lines can be integrated on the protection board 5, which can save the extra materials required for series-parallel connection, and at the same time save space and beautify the product.

[0028] In this embodiment, 8 21700 cylindrical batteries are adopted, which is a 4-series 2-parallel long straight cylindrical structure. The protection board correspondingly has a 4-series 2-parallel long strip structure, which not only has the protection function of a conventional protection board, but also has the series-parallel connection lines between the batteries. In addition, it can also play a role in fixing and supporting the battery pack. The structure of the protection board 5 in the utility model can not only meet the safety protection of the battery pack, but also meet the series-parallel connection of the battery pack. It solves the problems of complex production and unaesthetic appearance of conventional cable connections.

[0029] Next, taking 8 21700 cylindrical batteries as an example, the installation method of the long straight battery pack is described: first, stick the positive electrode insulating sheet and the negative electrode insulating sheet on the 8 21700 cylindrical batteries, and then complete the welding of the nickel sheets connecting the positive and negative electrodes of the batteries. Place them in the tooling fixture in the order of positive and negative electrodes, with the positive and negative nickel sheets aligned upward to complete the shaping of the external dimensions of the battery pack; secondly, align the opening positions of the series through holes 51, the first parallel through holes 52 and the second parallel through holes 53 of the protection board with the nickel sheet positions in sequence. After the nickel sheets pass through the series through holes 51, the first parallel through holes 52 and the second parallel through holes 53, fix the protection board to complete the fixation of the protection board position. Then, fold the nickel sheets corresponding to both sides and press them flat, and complete the welding connection between the protection board and the battery pack; finally, complete the insulation at both ends and the heat shrinkage of the battery pack with a film.

[0030] In addition, it should be understood that although this specification is described according to the embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A long and straight battery pack, characterized in that: It includes several groups of battery cell groups and a protection board (5) for installing several groups of battery cell groups. Adjacent battery cell groups are separated by an insulating partition (6). The battery cell groups are connected in parallel, and each battery cell group includes several serially connected battery cells (3).

2. The long and straight battery pack according to claim 1, wherein: A battery pack sleeve film is sleeved outside the long and straight battery pack.

3. The long and straight battery pack according to claim 1, wherein: Nickel sheets (2) are respectively connected to the positive and negative electrodes of the battery cell (3). The nickel sheets (2) of the positive and negative electrodes of adjacent battery cells (3) are connected to each other. Negative electrode insulating sheets (1) and positive electrode insulating sheets (4) are respectively arranged at both ends of the battery cell (3), and the negative electrode insulating sheet (1) and the positive electrode insulating sheet (4) isolate adjacent battery cells (3).

4. The long and straight battery pack according to claim 3, wherein: Series connection through holes (51), parallel connection through holes one (52) and parallel connection through holes two (53) are arranged on the protection board (5). The nickel sheets (2) of the positive and negative electrodes of adjacent battery cells (3) in the battery cell group pass through the series connection through holes (51) and are connected in series. The parallel connection through holes one (52) and the parallel connection through holes two (53) are used for leading out the nickel sheets (2) of the positive or negative electrode of the battery cell group, and the nickel sheets (2) led out from the parallel connection through holes one (52) and the parallel connection through holes two (53) are connected in parallel.

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