Cam following tension control device for lithium battery winder

Abstract

The invention discloses a cam following tension control device for a lithium battery winder, which comprises a winding needle, a tension pressing roll and an air cylinder, and is characterized in that: a cam following mechanism is arranged between the tension pressing roll and the air cylinder, and the rotational speed of the cam following mechanism accords with that of the winding needle. The cam following mechanism comprises a stepping motor, a following cam, a positioning bearing, a following plate, an extension spring, an air cylinder mounting plate and a linear guide rail, and is characterized in that: an outer edge of the following cam is in close contact with that of the positioning bearing; the front end of the following plate and the linear guide rail are arranged together; the tail end of the following plate is provided with the positioning bearing; and the middle part of the following plate is connected with a base plate through the extension spring. The air cylinder mounting plate is fixed in front of the following plate and connected with the air cylinder. The following cam is elliptic, is an exchangeable component and has spare parts with different models. The air cylinder is also connected with a pneumatic control regulating valve.

Description

technical field [0001] The invention relates to a lithium battery manufacturing equipment, in particular to a cam follower tension control device of a lithium battery winding machine. Background technique [0002] In the lithium-ion battery winding production process, tension control is a key factor affecting the winding quality of the battery core. Poor tension control can easily cause the following problems: [0003] 1) The tightness of the battery cells is inconsistent, causing excessive extrusion on the pole piece locally, resulting in damage to the pole piece or short circuit of the battery cell; [0004] 2) The consistency of the external dimensions of the battery cells is not good, and cannot meet the standard dimensions required by the process; [0005] 3) The relative position tolerance of the two positive and negative tabs of the battery cell is large, which cannot meet the process requirements. [0006] At present, there are two common winding tension control m...

AI Technical Summary

Problems solved by technology

[0003] 1) The tightness of the battery cells is inconsistent, causing excessive extrusion on the pole piece locally, resulting in damage to the pole piece or short circuit of the battery cell;

[0004] 2) The consistency of the external dimensions of the battery cells is not good, and cannot meet the standard dimensions required by the process;

[0005] 3) The relative position tolerance of the two positive and negative tabs of the battery cell is large, which cannot meet the process requirements

[0007] 1) Due to the difference in spring deformation, the tension applied to different parts of the battery core is inconsistent when the battery core is wound

[0008] 2) Due to the spring deformation recovery time and the inertia of mechanically pressed heavy objects, the tension pressure roller cannot follow the rhythm of the needle rotation. Therefore, during the winding process, the tension pressure roller cannot continuously compress the battery core, resulting in battery failure. The core is sometimes loose and sometimes tight

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