A battery electrode group preparation device, a battery electrode group preparation method, and a battery electrode group

Abstract

The invention belongs to the technical field of lithium battery production and manufacture, and discloses a battery pole group preparation device, a battery pole group preparation method and a battery pole group. The battery electrode group preparation device includes: a first conveying mechanism, which is used to convey the diaphragm; a second conveying mechanism, which is used to convey the positive electrode sheet; a third conveying mechanism, which is used to convey the negative electrode sheet; a first heating mechanism, which uses It is used to heat the diaphragm located on the first conveying mechanism; the second heating mechanism is used to heat the positive electrode sheet located on the second conveying mechanism; the third heating mechanism is used to heat the positive electrode sheet located on the third conveying mechanism The negative electrode sheet is heated; the forming mechanism is used to press the positive electrode sheet and the negative electrode sheet on both sides of the separator respectively to form a battery pole group. The positive electrode sheet, the negative electrode sheet and the diaphragm of the battery electrode group preparation device have a certain temperature before forming, so as to avoid the problem of long preheating time after forming, save production time, and improve production efficiency.

Description

technical field [0001] The invention relates to the technical field of lithium battery production and manufacturing, in particular to a battery pole group preparation device, a battery pole group preparation method and a battery pole group. Background technique [0002] At present, due to the advantages of high specific energy, high cycle times and long storage time, lithium-ion batteries are not only widely used in portable electronic devices such as mobile phones, digital cameras and laptop computers, but also extended to electric Bicycles, electric vehicles, mobile base stations and energy storage power stations and other fields. [0003] In response to this situation, the use of batteries no longer appears alone as in mobile phones, but more in the form of series-parallel battery packs. In the process of mass production of batteries, preheating is carried out after the battery poles are formed. The preheating time is too long and the preheating effect is poor, resulting...

AI Technical Summary

Problems solved by technology

In the process of mass production of batteries, preheating is carried out after the battery electrode assembly is formed. The preheating time is too long and the preheating effect is poor, resulting in frequent failure of the shape of the battery electrode group such as misalignment and softening.

Since in the automatic production line, a reliable solution is needed to maintain stable production, if there is a failure to shape the battery electrode group, it will seriously delay the production of the subsequent process and affect the pass rate of the entire production line

In addition, the forming process of the battery electrode group and the preheating process after forming are carried out separately. The dispersion of the process requires more manpower and financial resources to maintain, which invisibly increases the production cost and reduces the production efficiency, and it is difficult to guarantee the production process. accuracy

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