Single battery and soft package battery pack

Abstract

The embodiment of the utility model provides a single battery and a soft package battery pack. The single battery comprises a battery cell, a fixing plate, a tab and a supporting block, the battery cell is arranged on the fixing plate, and the tab extends from the top end of the battery cell and is bent in a C shape at the top end of the fixing plate; an accommodating groove is formed between the fixed plate and the bent tab; and the supporting block is arranged in the accommodating groove and is used for supporting the tab. Through the arrangement, the fixing plates, the tabs and the supporting blocks are combined, so that the stability of the tabs can be enhanced, the tabs are kept on the same horizontal plane, the stability of the tabs is improved, meanwhile, laser welding of series-parallel connection of the tabs is facilitated, the welding efficiency and the welding effect are improved, and further, the welding quality is improved. The production efficiency of soft package battery grouping can be improved, and soft package batteries can be grouped by a full-automatic production line.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a single cell battery and a pouch battery pack. Background Technology

[0002] With the rapid development of intelligent manufacturing, many industries have gradually upgraded and transformed. In the lithium battery industry, pouch batteries, due to their advantages such as lightweight, high safety, and long lifespan, have been widely used in many fields such as power banks, electric bicycles, drones, and laptops.

[0003] With the increasing demand for pouch battery packs, the assembly of pouch batteries will inevitably adopt fully automated production lines. Currently, the lithium battery industry generally uses soldering for the series and parallel connection of pouch battery tabs. Soldering requires controlling the soldering time, adding connecting plates, and prolonged high-temperature molten solder can damage the battery. Furthermore, it is difficult to achieve fully automated production. Therefore, its assembly method needs to differ from traditional manufacturing processes. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a single-cell battery and a pouch battery.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, this utility model provides a single battery cell, comprising: a battery cell, a fixing plate, a tab, and a support block; the battery cell is disposed on the fixing plate, the tab extends from the top of the battery cell and is bent in a "C" shape at the top of the fixing plate; a receiving groove is formed between the fixing plate and the bent tab; the support block is disposed in the receiving groove for supporting the tab.

[0007] In a preferred embodiment of this utility model, the support block is made of insulating material.

[0008] In a preferred embodiment of this utility model, the support block includes a limiting groove, the width of which is the same as the width of the electrode tab, and the electrode tab is engaged in the limiting groove.

[0009] In a preferred embodiment of the present invention, the electrode tab includes a first folded edge, which is fitted into the limiting groove, and the limiting groove and the first folded edge are connected by adhesive backing.

[0010] In a preferred embodiment of the present invention, the electrode tabs include a positive electrode tab and a negative electrode tab, and the limiting grooves include a positive electrode tab limiting groove and a negative electrode tab limiting groove, wherein the positive electrode tab and the negative electrode tab are respectively engaged in the positive electrode tab limiting groove and the negative electrode tab limiting groove.

[0011] In a preferred embodiment of this utility model, both the positive and negative electrodes are nickel-based alloy materials that have undergone nickel conversion treatment.

[0012] In a preferred embodiment of the present invention, the fixing plate includes a base, a second folded edge, and a third folded edge, wherein the second folded edge and the third folded edge are disposed on the left and right sides of the base.

[0013] Secondly, this utility model embodiment also provides a soft-pack battery pack, including a cell module and a connecting plate;

[0014] The battery cell module includes a single battery cell as described in any embodiment of the present invention;

[0015] The tabs of the various individual batteries all face the same side;

[0016] The connecting plate is connected to the tabs of the plurality of individual battery cells.

[0017] In a preferred embodiment of this utility model, the connecting plate includes a connecting plate frame and a busbar, the busbar being disposed between the connecting plate frame and the electrode tab, and the busbar being welded to the electrode tab.

[0018] In a preferred embodiment of this utility model, the connecting plate frame is provided with a plurality of through holes at the position where the busbar is located, and the busbar is exposed through the through holes.

[0019] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0020] In the first aspect, the combination of the fixing plate, the electrode tab, and the support block, as described above, enhances the stability of the electrode tab and ensures that the electrode tabs remain on the same horizontal plane. This improves electrode tab stability and facilitates laser welding of the electrode tabs in series and parallel, thereby increasing welding efficiency and effectiveness. Secondly, by fixing the battery electrode tabs as described above, during the production of pouch batteries, it facilitates close contact between the connecting plate and the electrode tabs, allowing for direct laser welding of the electrode tabs in series and parallel connections. This improves the production efficiency of pouch battery assembly and enables fully automated production lines for pouch battery assembly. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of a single battery provided by this utility model;

[0022] Figure 2 An exploded structural diagram of a single-cell battery provided by this utility model;

[0023] Figure 3A schematic diagram of a soft-pack battery pack assembly provided by this utility model;

[0024] Figure 4 This is an exploded structural diagram of a connecting plate provided by this utility model. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0027] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," "fixing," and "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Firstly, please refer to Figure 1-2 This utility model embodiment provides a single battery 100, including: a battery cell 110, a fixing plate 120, a tab 130, and a support block 140; the battery cell 110 is disposed on the fixing plate 120, the tab 130 extends from the top of the battery cell 110 and is bent in a "C" shape at the top of the fixing plate 120; a receiving groove 150 is formed between the fixing plate 120 and the bent tab 130; the support block 140 is disposed in the receiving groove 150 for supporting the tab 130.

[0030] The arrangement and connection method of the individual battery cells can be flexibly set according to the requirements of the cell module.

[0031] The technical solution of this utility model embodiment, through the above-described arrangement, combines the fixing plate, the electrode tab, and the support block to enhance the stability of the electrode tab and keep the electrode tab on the same horizontal plane. While improving the stability of the electrode tab, it is also beneficial for laser welding of the electrode tab in series and parallel, improving welding efficiency and welding effect. Furthermore, it can improve the production efficiency of soft-pack battery pack assembly and realize the assembly of soft-pack batteries on a fully automated production line.

[0032] In a preferred embodiment of this invention, the support block is made of an insulating material to prevent electrical conductivity. Furthermore, the support block is made of an insulating material with a certain degree of hardness, such as plastic or resin, to provide support for the electrode tab.

[0033] For a preferred embodiment of this utility model, please refer to Figure 1-2 The support block 140 includes a limiting groove 141, the width of which is the same as the width of the tab 130, and the tab 130 is engaged within the limiting groove 141. By providing the limiting groove, the tab can be prevented from swaying left and right, facilitating its positioning and further facilitating the automated assembly of pouch batteries.

[0034] For a preferred embodiment of this utility model, please refer to Figure 1-2 The tab 130 includes a first folded edge 131, which is engaged within the limiting groove 141. The limiting groove 141 and the first folded edge 131 are connected by adhesive backing. The adhesive backing further prevents the tab from shaking or shifting.

[0035] For a preferred embodiment of this utility model, please refer to Figure 1-2 The electrode tab 130 includes a positive electrode tab 132 and a negative electrode tab 133, and the limiting groove 141 includes a positive electrode tab limiting groove 142 and a negative electrode tab limiting groove 143. The positive electrode tab 132 and the negative electrode tab 133 are respectively engaged within the positive electrode tab limiting groove 142 and the negative electrode tab limiting groove 143. The series and parallel connection method between the positive and negative electrodes of the single battery cell can be flexibly set according to the requirements of the cell module.

[0036] In a preferred embodiment of this invention, both the positive and negative electrodes are nickel-based alloy materials that have undergone nickel conversion treatment. The nickel conversion treatment involves converting the aluminum electrodes to nickel, and surface treatment of the electrodes transforming the metal surface into a nickel-based alloy layer, which improves the electrodes' corrosion resistance, wear resistance, and other properties.

[0037] For a preferred embodiment of this utility model, please refer to Figure 1-2 The fixing plate 120 includes a base 121, a second folded edge 122, and a third folded edge 123, with the second folded edge 122 and the third folded edge 123 disposed on the left and right sides of the base 121. This arrangement strengthens the fixation of the battery cell and also strengthens the lateral fixation of the support block, preventing displacement.

[0038] Secondly, refer to Figure 3-4 This utility model embodiment also provides a soft-pack battery pack, including a cell module 1 and a connecting plate 2;

[0039] The cell module 1 includes a single battery 100 as described in any embodiment of the present invention;

[0040] The tabs of the plurality of individual battery cells 100 all face the same side;

[0041] The connecting plate 2 is connected to the tabs of the plurality of individual battery cells 100. As a preferred embodiment of this utility model, see reference... Figure 4 The connecting plate 2 includes a connecting plate frame 210 and a busbar 220. The busbar 220 is disposed between the connecting plate frame 210 and the electrode 130, and is welded to the electrode. The size and shape of the busbar can be flexibly configured according to requirements. One side of the busbar 220 is connected to the electrode via laser welding, and the other side of the busbar 220 is in close contact with the bottom side of the connecting plate frame 210.

[0042] As a preferred embodiment of this utility model, refer to Figure 4 The connecting plate frame 210 has several through holes 211 at the location where the busbar 220 is located, through which the busbar 220 is exposed. It is known that the connecting plate frame is made of insulating material. This enables the connection between the battery and external devices, providing power to the external devices.

[0043] The present invention adopts the above-described configuration, which allows for the series and parallel connection of the tabs when producing soft-pack battery packs using laser welding, thereby improving the production efficiency of soft-pack battery packs and enabling fully automated production lines to pack soft-pack batteries.

[0044] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A single-cell battery, characterized in that, include: The battery cell comprises a fixing plate, a tab, and a support block; the battery cell is disposed on the fixing plate, and the tab extends from the top of the battery cell and bends in a "C" shape at the top of the fixing plate; a receiving groove is formed between the fixing plate and the bent tab; the support block is disposed in the receiving groove to support the tab.

2. The single-cell battery according to claim 1, characterized in that, The support block is made of insulating material.

3. The single-cell battery according to claim 1, characterized in that, The support block includes a limiting groove, the width of which is the same as the width of the electrode tab, and the electrode tab is engaged within the limiting groove.

4. The single-cell battery according to claim 3, characterized in that, The tab includes a first folded edge, which is engaged in the limiting groove, and the limiting groove and the first folded edge are connected by adhesive backing.

5. The single-cell battery according to claim 4, characterized in that, The electrode tabs include a positive electrode tab and a negative electrode tab, and the limiting grooves include a positive electrode tab limiting groove and a negative electrode tab limiting groove. The positive electrode tab and the negative electrode tab are respectively locked in the positive electrode tab limiting groove and the negative electrode tab limiting groove.

6. The single-cell battery according to claim 5, characterized in that, Both the positive and negative electrodes are made of nickel-based alloy materials that have undergone nickel conversion treatment.

7. The single-cell battery according to claim 1, characterized in that, The fixing plate includes a base, a second folded edge, and a third folded edge, with the second folded edge and the third folded edge disposed on the left and right sides of the base.

8. A soft-pack battery pack, characterized in that, Including battery cell modules and connecting boards; The cell module includes a plurality of individual cells as described in any one of claims 1-7; The tabs of the various individual batteries all face the same side; The connecting plate is connected to the tabs of the plurality of individual battery cells.

9. The soft-pack battery pack according to claim 8, characterized in that, The connecting plate includes a connecting plate frame and a busbar. The busbar is disposed between the connecting plate frame and the electrode tab, and the busbar and the electrode tab are welded together.

10. The soft-pack battery pack according to claim 9, characterized in that, The connecting plate frame has several through holes at the location where the busbar is located, and the busbar is exposed through the through holes.

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