Lithium ion battery cell manufacturing method, lamination device and lithium ion battery
A lithium-ion battery and stacking device technology, which is applied in secondary battery manufacturing, secondary batteries, battery assembly machines, etc., can solve the problems of unreliable state, affecting battery production, wrinkling, etc., and achieve the effect of avoiding wrinkling
Pending Publication Date: 2022-06-24
BYD CO LTD
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Problems solved by technology
However, the diaphragm in a free state is unreliable when the stacking platform and the diaphragm unwinding mechanism move with each other, and precision problems such as wrinkling, folding, and deflection may occur, which will affect the production of batteries
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[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0034] see figure 1 , The present invention provides a lamination device, which is used for the production of battery cells. In the embodiment of the present invention, the lamination device includes a lamination platform 10 , a diaphragm conveying part, a cutting knife 15 and a diaphragm pulling member.
[0035] A diaphragm roll 21 is installed on the diaphragm transmission part, and one end of the diaphragm 22 on the diaphragm roll...
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The invention provides a lamination device, a lithium ion battery and a lithium ion battery cell manufacturing method.The lamination device comprises a lamination platform, a diaphragm conveying part, a cutting knife and a diaphragm traction piece, a diaphragm roll is installed on the diaphragm conveying part, one end of a diaphragm on the diaphragm roll is connected with the lamination platform, and the other end of the diaphragm on the diaphragm roll is connected with the cutting knife; the lamination platform can move between a first position and a second position, the cutting knife is arranged above the lamination platform at the first position and is used for cutting a laminated diaphragm, the diaphragm traction piece comprises a traction clamp, a moving part for driving the traction clamp to move and a position sensor arranged on the lamination platform, the traction clamp clamps the end part of the cut diaphragm, and the position sensor is arranged on the lamination platform. The moving part drives the traction clamp to move to the lamination platform located at the second position and turns over the diaphragm, the diaphragm can be installed on the lamination platform in a voucher mode, the position of the diaphragm is sensed through the position sensor so that the diaphragm can be accurately positioned on the lamination platform and fixed, and smoothness and positioning precision of the diaphragm are guaranteed.
Description
technical field [0001] The invention relates to the technical field of battery manufacturing, in particular to a method for manufacturing a lithium ion battery cell, and also to a stacking device and a lithium ion battery. Background technique [0002] At present, with the continuous development of the new energy vehicle industry, large-capacity rechargeable batteries have become the trend of future development. Li-ion batteries have the characteristics of high continuous storage density and long service life, making them the mainstay of batteries. Now in the battery production process, the preparation method of the battery core mainly adopts the "Z"-shaped lamination scheme, in which the diaphragm needs to completely wrap the outermost positive / negative pole piece, which will generate a battery after each stacking. After the core cuts the diaphragm, the diaphragm at the head end of the next cell will be in an open and free state, and the diaphragm in the free state is on th...
Claims
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IPC IPC(8): H01M10/0583H01M10/0525H01M10/04
CPCH01M10/0583H01M10/0525H01M10/0409Y02P70/50
Inventor 毛祖宙李骁张勇肖锦雯许教练
Owner BYD CO LTD