Aluminum-to-nickel tab
By adopting a serpentine arrangement of tight laser welding spot rows and a two-row spaced arrangement structure in the aluminum-to-nickel tab, the problems of insufficient tensile strength and flow capacity of the aluminum-to-nickel tab in the existing technology are solved, and higher flow capacity and welding strength are achieved.
Patent Information
- Application Number
- CN202422661101.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-10-31
AI Technical Summary
During the processing of existing aluminum-to-nickel tabs, the gaps in the laser welds result in insufficient tensile strength and current carrying capacity, which is especially evident when the width is small.
A serpentine-shaped laser welding spot arrangement is adopted, and adjacent welding spots are arranged closely to increase the cross-sectional area of the aluminum-to-nickel zone and the welding strength. The tensile strength is further improved by setting two rows of spaced laser welding spots.
It enhances the current carrying capacity and tensile strength of the aluminum-to-nickel tabs, fills the gaps in the solder joints, and improves the overall welding strength and tensile properties.
Smart Images
Figure CN223390734U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of soft-package lithium battery manufacturing, in particular to an aluminum-to-nickel tab. Background Art
[0002] Soft-package lithium batteries are lithium-ion batteries that use aluminum-plastic film as their outer shell. With their high energy density, safety, and flexible design, they are becoming the first choice for more and more applications. The positive tabs of soft-package lithium-ion batteries are made of aluminum and need to be converted to nickel before they can be used. Figure 1 As shown, during the processing of existing aluminum-to-nickel tabs, to improve processing efficiency and without affecting the normal function of the tab, a linear array of laser welds 4' is typically installed in the aluminum-to-nickel region 3' formed by the overlap of a portion of the nickel strip 1' and a portion of the aluminum strip 2' for fixation. Adjacent laser welds in this array 4' are spaced apart, and tab glue 5' is applied to the aluminum strip 2'. However, due to the gap between adjacent laser welds in this array 4', the tensile strength and current carrying capacity of the aluminum-to-nickel region of smaller aluminum-to-nickel tabs are relatively low. Utility Model Content
[0003] The purpose of the utility model is to provide an aluminum-to-nickel tab, which can increase the tensile strength and current carrying capacity of the aluminum-to-nickel zone by adjusting the welding structure of the laser welding point in the aluminum-to-nickel zone.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0005] An aluminum-to-nickel tab comprises a nickel strip and an aluminum strip, wherein part of the nickel strip and part of the aluminum strip are overlapped to form an aluminum-to-nickel area, and a plurality of laser welding spots are provided on the aluminum-to-nickel area. The plurality of laser welding spots are arranged in a serpentine shape along the width direction of the aluminum-to-nickel area to form a laser welding spot row, and two adjacent laser welding spots in the laser welding spot row are closely arranged; and tab glue is provided on the aluminum strip.
[0006] As a preferred solution of the present invention, there are two rows of laser welding point rows, and the two rows of laser welding point rows are arranged at intervals.
[0007] As a preferred solution of the present invention, the length of the aluminum strip is 4 mm to 12 mm.
[0008] As a preferred solution of the present invention, the length of the nickel strip is 13 mm to 21 mm.
[0009] As a preferred solution of the present invention, the length of the aluminum-to-nickel zone is 3 mm to 5 mm, and the width of the aluminum-to-nickel zone is 10 mm to 70 mm.
[0010] The aluminum-to-nickel tab provided by the present invention has the following advantages compared with the prior art:
[0011] The aluminum-to-nickel zone of the present invention connects part of the aluminum strip and part of the nickel strip through a laser welding point row arranged in a serpentine shape. At the same time, the two adjacent laser welding points in the laser welding point row are closely arranged. Compared with the laser welding point row arranged in a straight line on the aluminum-to-nickel zone in the prior art, and the two adjacent laser welding points in the laser welding point row are arranged in an interval welding structure, the present invention can, on the one hand, fill the gap between the laser welding points, increase the cross-sectional area of the aluminum-to-nickel zone for flow, and allow a larger current to pass through, thereby improving the flow capacity of the tab; on the other hand, it can increase the overall size of the laser welding point row, thereby increasing the welding strength of the aluminum-to-nickel zone, and further increasing the tensile strength of the aluminum-to-nickel zone. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments are briefly introduced below.
[0013] Figure 1 This is a schematic diagram of the structure of the aluminum-to-nickel tab in the prior art;
[0014] Figure 2 This is a schematic structural diagram of an aluminum-to-nickel tab provided in an embodiment of the present invention.
[0015] Markings in the figure:
[0016] 1', nickel strip; 2', aluminum strip; 3', aluminum-to-nickel area; 4', laser welding spot row; 5', tab glue; 1, nickel strip; 2, aluminum strip; 3, aluminum-to-nickel area; 4, laser welding spot row; 5, tab glue. DETAILED DESCRIPTION
[0017] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0018] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.
[0019] See also Figure 2 A preferred embodiment of the present invention provides an aluminum-to-nickel tab, comprising a nickel strip 1 and an aluminum strip 2, wherein a portion of the nickel strip 1 and a portion of the aluminum strip 2 are overlapped to form an aluminum-to-nickel area 3, wherein the aluminum-to-nickel area 3 is provided with a plurality of laser welding spots, and the plurality of laser welding spots are arranged in a serpentine shape along the width direction of the aluminum-to-nickel area 3 to form a laser welding spot row 4, wherein two adjacent laser welding spots in the laser welding spot row 4 are closely arranged; and a tab glue 5 is provided on the aluminum strip 2.
[0020] According to the aluminum-to-nickel tab of this embodiment, the aluminum-to-nickel area 3 connects part of the aluminum strip 2 and part of the nickel strip 1 through a laser weld point row 4 arranged in a serpentine shape. At the same time, two adjacent laser welds in the laser weld point row 4 are closely arranged. Compared with the laser weld point row arranged in a straight line on the aluminum-to-nickel area in the prior art, and the two adjacent laser welds in the laser weld point row are welded in a spaced-apart structure, the present invention can, on the one hand, fill the gaps between the laser weld points, increase the cross-sectional area of the aluminum-to-nickel area 3 for flow, and allow a larger current to pass through, thereby improving the flow capacity of the tab; on the other hand, it can increase the overall size of the laser weld point row 4, thereby increasing the welding strength of the aluminum-to-nickel area 3, and further increasing the tensile strength of the aluminum-to-nickel area 3.
[0021] For example, in order to further improve the tensile strength and the current carrying capacity of the aluminum-to-nickel zone 3 , the laser welding point rows 4 are provided in two rows, and the two rows of laser welding point rows 4 are arranged at intervals.
[0022] It should be noted that, in this embodiment, the length of the aluminum strip is preferably 4 mm to 12 mm; the length of the nickel strip is preferably 13 mm to 21 mm; the length of the aluminum-to-nickel zone is preferably 3 mm to 5 mm, and the width of the aluminum-to-nickel zone is preferably 10 mm to 70 mm.
[0023] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.
Claims
1. An aluminum-to-nickel tab, characterized in that: It includes a nickel strip and an aluminum strip, part of the nickel strip and part of the aluminum strip are overlapped to form an aluminum-to-nickel area, a plurality of laser welding spots are provided on the aluminum-to-nickel area, and the plurality of laser welding spots are arranged in a serpentine shape along the width direction of the aluminum-to-nickel area to form a laser welding spot row, and two adjacent laser welding spots in the laser welding spot row are closely arranged; the aluminum strip is provided with tab glue.
2. The aluminum-to-nickel tab according to claim 1, characterized in that There are two rows of laser welding point rows, and the two rows of laser welding point rows are arranged at intervals.
3. The aluminum-to-nickel tab according to claim 1, characterized in that The length of the aluminum strip is 4 mm to 12 mm.
4. The aluminum-to-nickel tab according to claim 1, characterized in that The length of the nickel strip is 13 mm to 21 mm.
5. The aluminum-to-nickel tab according to claim 1, characterized in that: The length of the aluminum-to-nickel zone is 3 mm to 5 mm, and the width of the aluminum-to-nickel zone is 10 mm to 70 mm.