Processing technology of aluminum shell of lithium battery
A processing technology, lithium battery technology, applied in battery pack parts, circuits, electrical components, etc., can solve problems such as difficulty in ensuring thickness consistency and smooth surface appearance, the influence of aluminum shell steel strength, and long time.
Pending Publication Date: 2021-05-28
ZHEJIANG NARADA POWER SOURCE CO LTD +1
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Problems solved by technology
[0003] 1. It takes 7-8 working steps to draw to the required size. The number of working steps is large, the time is long, and the cumulative scrap rate is high.
[0004] 2. Sample layout, edge trimming, etc. are required before and after the deep drawing process, resulting in material waste
[0005] 3. It is difficult to ensure the consistency of thickness and smooth surface appearance due to multiple stretching and cutting
[0006] 4. After multiple plastic deformations, the steel strength of the aluminum shell is affected, and the battery expansion is affected after the battery is formed
Method used
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[0029] The implementation of the present application will be described in detail below with reference to the accompanying drawings and examples, so as to fully understand and implement the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects.
[0030] see Figure 1-4 , the present invention provides a lithium battery aluminum case processing technology, including the cutting, bending and welding process of aluminum plate, specifically including the following steps:
[0031] Cut the aluminum plate according to the size of the standard semi-finished aluminum shell (length L, width M, height N), and cut the aluminum plate into an aluminum plate with a fixed width A (A=2M+2N), and the length of the aluminum plate is B (B≥K· L, where K≥1);
[0032] Adjust the bending machine so that the bending length is 0.5N, place the length side of the aluminum plate parallel to the bending tool in the bending machi...
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The invention belongs to the technical field of battery production, and particularly relates to a processing technology of an aluminum shell of a lithium battery. The processing technology is characterized by comprising the working procedures of cutting, bending and welding an aluminum plate, the cut aluminum plate is subjected to four-step bending processing by adopting a bending technology, and an unwelded aluminum shell semi-finished product is finally formed; then, splicing seams are welded through laser welding, and therefore an aluminum shell semi-finished product is obtained; and finally, a prefabricated bottom plate and a prefabricated top cover are welded, so that the complete aluminum shell is obtained. According to the processing technology, after the aluminum plate is cut according to the preset size, the aluminum plate can be processed into the aluminum shell semi-finished product only through the bending procedure, and then the aluminum shell semi-finished product is processed into the complete aluminum shell through the welding procedure; in the process, waste is generated only in the early-stage cutting process, no waste is generated in the subsequent bending process; and the processing process is fast, the defective rate is low in the bending process, the thicknesses of all parts of the aluminum shell are kept consistent, and the strength is high, so that the processing technology can reduce the technology steps, reduce the production cost and ensure the quality of the aluminum shell.
Description
technical field [0001] The invention belongs to the technical field of battery production, in particular to a process for processing an aluminum case of a lithium battery. Background technique [0002] The existing aluminum shell or steel shell lithium-ion shell processing technology adopts deep drawing, stamping and other shaping methods, and the aluminum shell is formed in multiple steps. The main defect of existing scheme is: [0003] 1. It takes 7-8 working steps to draw to the required size. The number of working steps is large, the time is long, and the cumulative scrap rate is high. [0004] 2. Before and after the deep drawing process, sample layout and edge trimming are required to cause material waste. [0005] 3. Repeated stretching and cutting are difficult to ensure the consistency of thickness and smooth surface appearance. [0006] 4. After repeated plastic deformation, the steel strength of the aluminum shell will be affected, and the battery expansion wil...
Claims
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Login to View More IPC IPC(8): B23P15/00H01M50/119
CPCB23P15/00
Inventor 邓高王盈来刘月学郭峰马静黄文
Owner ZHEJIANG NARADA POWER SOURCE CO LTD