Aluminum shell battery and welding method thereof

Abstract

The invention discloses an aluminum shell battery and a welding method thereof, and belongs to the technical field of batteries, the aluminum shell battery comprises a battery cell, an adapter plate and a cover plate, the battery cell comprises battery cell bodies and tabs located on the battery cell bodies, the adjacent battery cell bodies are distributed in a V-shaped welding manner, the adapter plate welds the two adjacent tabs, and the cover plate is connected with the adapter plate. And the cover plate is positioned on the adapter plate and is welded with the adapter plate. According to the aluminum shell battery and the welding method thereof, stable welding of the aluminum shell battery is achieved, the height of the tabs can be effectively reduced in the welding process, and the use amount of copper foil and aluminum foil on the battery is reduced, so that the production cost of the battery is reduced, and the welding stability of the battery is also improved.

Description

Technical Field

[0001] The invention belongs to the technical field of batteries, and in particular relates to an aluminum shell battery and a welding method thereof. Background Art

[0002] The current aluminum shell battery is mainly composed of the outer shell, top cover assembly, adapter, insulation film, bottom support plate and battery cell. The top cover is an important protective device for aluminum shell batteries. Figure 1 As shown, the battery cell of the existing aluminum shell battery includes a battery cell body and a pole ear. The battery cell and the adapter are first butterfly-welded, and then the adapter is welded to the cover plate. During the welding process between the battery cell and the cover plate, the battery cell is in a lying state. In this welding process, in order not to damage the pole ear, the pole ear of the battery cell needs to be lengthened to enable the welding process to proceed stably. However, increasing the length of the pole ear will increase the battery cost. Summary of the invention

[0003] The present invention overcomes the deficiencies of the prior art and provides an aluminum shell battery and a welding method thereof to solve the problems existing in the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an aluminum shell battery, comprising a battery cell, a adapter and a cover plate, the battery cell comprising a battery cell body and a pole ear located on the battery cell body, the adjacent battery cell bodies are welded in a V-shape, the adapter plate welds two adjacent pole ears, and the cover plate is located on the adapter plate and welded to the adapter plate.

[0005] In a preferred embodiment of the present invention, an angle is formed between adjacent battery cell bodies, and the angle is 10-40°.

[0006] In a preferred embodiment of the present invention, the adapter plate includes a positive adapter plate and a negative adapter plate. The positive adapter plate welds two tabs located at the positive pole of the battery cell body, and the negative adapter plate welds two tabs located at the negative pole of the battery cell body.

[0007] The invention also discloses a welding method, comprising the following steps:

[0008] S1, welding the battery cell body and the adapter sheet to form the battery cell body and the adapter sheet;

[0009] S2. Weld the adapter plate to the cover plate. During the welding process, the battery cell body is in an inclined state, and a V shape is formed between the two battery cell bodies.

[0010] In a preferred embodiment of the present invention, in step S1, when the battery cell body and the adapter are welded, the welding surface is located in the middle of the tab.

[0011] In a preferred embodiment of the present invention, the battery cell body and the adapter are butterfly welded.

[0012] The present invention solves the defects existing in the background technology and has the following beneficial effects:

[0013] The aluminum shell battery and the welding method thereof of the present invention realize stable welding of the aluminum shell battery, can effectively reduce the height of the pole ear during the welding process, reduce the use of copper foil and aluminum foil on the battery, thereby reducing the production cost of the battery, and is also conducive to improving the welding stability of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0015] Figure 1 A schematic diagram of battery welding in the background technology of the present invention;

[0016] Figure 2 It is a schematic diagram of the overall structure of a preferred embodiment of the present invention;

[0017] Figure 3 A side view of a preferred embodiment of the present invention;

[0018] Figure 4 for Figure 2 Schematic diagram of the structure after removing the cover plate;

[0019] Figure 5 A flowchart of a preferred embodiment of the present invention;

[0020] In the figure: 10, battery cell; 11, battery cell body; 12, pole ear; 20, adapter; 21, positive adapter; 22, negative adapter; 30, cover. DETAILED DESCRIPTION

[0021] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many physical details will be described together in the following description. However, it should be understood that these physical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these physical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0022] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] Embodiment 1

[0024] This embodiment provides an aluminum shell battery, which can effectively reduce the height of the tab 12 during the welding process, reduce the amount of copper foil and aluminum foil used on the battery, thereby reducing the production cost of the battery and is also beneficial to improving the welding stability of the battery.

[0025] Combination Figures 2 to 4 As shown, the aluminum shell battery of this embodiment includes a battery cell 10, a transfer sheet 20 and a cover plate 30. The battery cell 10 includes a battery cell body 11 and a pole ear 12 located on the battery cell body 11. The adjacent battery cell bodies 11 are welded in a V-shaped distribution. The transfer sheet 20 welds two adjacent pole ears 12. The cover plate 30 is located on the transfer sheet 20 and is welded to the transfer sheet 20. An angle is formed between the adjacent battery cell bodies 11, and the angle is 10-40°. In the welding process of the aluminum shell battery, the battery cell is firstly welded. The main body 11 and the adapter 20 are butterfly-welded. After the welding is completed, the two battery cell bodies 11 are bent to form a V-shaped structure. At this time, the pole ears 12 on the battery cell bodies 11 are basically on the same horizontal plane. When the adapter 20 and the cover plate 30 are welded, and when the battery cell body 11 and the adapter 20 are welded, the welding surface is located in the middle of the pole ear 12, so that the height of the pole ear 12 can be minimized, saving the use of copper foil and aluminum foil.

[0026] In this embodiment, the adapter plate 20 includes a positive adapter plate 21 and a negative adapter plate 22. The positive adapter plate 21 welds two tabs 12 located at the positive pole of the battery cell body 11, and the negative adapter plate 22 welds two tabs 12 located at the negative pole of the battery cell body 11.

[0027] In summary, the aluminum shell battery of this embodiment can effectively reduce the height of the tab 12 during the welding process, reduce the amount of copper foil and aluminum foil used in the battery, thereby reducing the production cost of the battery, and is also beneficial to improving the welding stability of the battery.

[0028] Embodiment 2

[0029] like Figure 5 As shown, this embodiment provides a welding method, which performs welding processing on an aluminum shell battery, and the welding method includes the following steps:

[0030] S1, welding the battery cell body 11 and the adapter sheet 20, so that the battery cell body 11 and the adapter sheet 20 are welded and formed, and the battery cell body 11 and the adapter sheet 20 are butterfly welded;

[0031] S2. Weld the adapter plate 20 and the cover plate 30. During the welding process, the cell body 11 is in an inclined state, and a V shape is formed between the two cell bodies 11, which can effectively reduce the height of the tab 12 during the welding process.

[0032] In this embodiment, when the cell body 11 is welded to the adapter 20 , the welding surface is located in the middle of the tab 12 , which reduces the distance between the two cell bodies 11 , thereby reducing the height of the tab 12 and reducing the use of copper foil or aluminum foil.

[0033] In combination with Example 1 and Example 2, the aluminum shell battery and the welding method thereof of the present invention realize stable welding of the aluminum shell battery, can effectively reduce the height of the tab 12 during the welding process, and reduce the use of copper foil and aluminum foil on the battery, thereby reducing the production cost of the battery, and is also beneficial to improving the welding stability of the battery.

[0034] Although the present invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the present invention. That is, the methods, systems or devices discussed above are all examples. Various configurations may appropriately omit, replace or add various processes or components. For example, in alternative configurations, the method may be performed in an order different from the order described, and / or various stages may be added, omitted and / or combined. Moreover, the features described with respect to certain configurations may be combined in various other configurations. Different aspects and elements of the configurations may be combined in a similar manner. In addition, with the development of technology, many elements are merely examples and do not limit the scope of the present disclosure or claims.

[0035] Specific details are given in the specification to provide a thorough understanding of the exemplary configurations including implementations. However, the configurations can be practiced without these specific details, for example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary details to avoid obscuring the configurations. This description provides only example configurations and does not limit the scope, applicability, or configurations of the claims. On the contrary, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made to the functions and arrangements of the elements without departing from the spirit or scope of the present disclosure.

[0036] In addition, although each operation may describe the operation as a sequential process, many operations may be performed in parallel or simultaneously. In addition, the order of the operations may be rearranged. A process may have additional steps. In addition, examples of methods may be implemented by hardware, software, firmware, middleware, code, hardware description language, or any combination thereof. When implemented in software, firmware, middleware, or code, program code or code segments for performing the necessary tasks may be stored in a non-transitory computer-readable medium such as a storage medium, and the described tasks are performed by a processor.

[0037] In summary, it is intended that the above detailed description is considered to be exemplary rather than restrictive, and it should be understood that the claims (including all equivalents) are intended to limit the spirit and scope of the present invention. The above embodiments should be understood to be only used to illustrate the present invention and not to limit the scope of protection of the present invention. After reading the content of the record of the present invention, the technician can make various changes or modifications to the present invention, and these equivalent changes and modifications also fall into the scope limited by the claims of the present invention.

Claims

1. An aluminum shell battery, characterized in that: The invention comprises a battery cell (10), a transfer sheet (20) and a cover plate (30), wherein the battery cell (10) comprises a battery cell body (11) and a pole ear (12) located on the battery cell body (11), adjacent battery cell bodies (11) are welded in a V-shape, the transfer sheet (20) welds two adjacent pole ears (12), and the cover plate (30) is located on the transfer sheet (20) and is welded to the transfer sheet (20).

2. An aluminum shell battery according to claim 1, characterized in that: An angle is formed between adjacent battery cell bodies (11), and the angle is 10-40°.

3. An aluminum shell battery according to claim 1, characterized in that: The adapter plate (20) comprises a positive adapter plate (21) and a negative adapter plate (22); the positive adapter plate (21) is used to weld two pole tabs (12) located at the positive pole of the battery cell body (11); and the negative adapter plate (22) is used to weld two pole tabs (12) located at the negative pole of the battery cell body (11).

4. A welding method, applied to an aluminum shell battery according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1, welding the battery cell body (11) and the adapter sheet (20) to form the battery cell body (11) and the adapter sheet (20); S2. Welding the adapter plate (20) and the cover plate (30), wherein the battery cell body (11) is in an inclined state during the welding process, and a V shape is formed between the two battery cell bodies (11).

5. A welding method according to claim 4, characterized in that: In step S1, when the battery cell body (11) and the adapter sheet (20) are welded, the welding surface is located in the middle of the electrode tab (12).

6. A welding method according to claim 4, characterized in that: The battery cell body (11) and the adapter sheet (20) are butterfly welded.

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