Control system involving battery pole piece baking

Abstract

The invention relates to a novel baking method and a control system. The control system comprises a data acquisition system, a coating system, a rolling system, a baking oven unreeling system, a baking channel region, a low-dew-point drying chamber, a moisture tester, a dehumidification exchange system and a data transmission network, wherein the low-dew-point drying chamber comprises a baking oven reeling system, a slitting system and a cell rotary matching system; the coating system is sequentially connected with the rolling system, the baking oven unreeling system, the baking channel region, the baking oven reeling system, the slitting system and the cell rotary matching system in series; the dehumidification exchange system is independently connected with the baking channel region; and the two sides of the data acquisition system are connected with the coating system and the baking oven reeling system respectively through the data transmission network. The novel baking method and the control system, provided by the invention, have the advantages of simple structure and reasonable design; the problem that a temperature field is not uniform in temperature rising and cooling processes of a traditional baking manner so that generated stress is not uniform is improved; the quality of pole pieces is optimized, the deformation is reduced, and the yield of the product is improved; and a control manner of production of the pole pieces is expanded.

Description

technical field [0001] The invention relates to the field of lithium battery manufacturing, in particular to a novel baking method and a control system, which is a novel battery pole piece baking method and provides a battery pole piece production control system. Background technique [0002] The pole piece PPM value has always been an important control parameter in the production process of lithium batteries. If the control is not good, the cycle life and safety performance of the battery will be affected. In the traditional pole piece baking method, the operator puts the cut pole piece in a vacuum oven for vacuum baking. During this period, nitrogen is filled every once in a while, and then vacuum baked, and the cycle is repeated many times. , this method has certain quality hidden dangers, and during the heating and cooling process of baking, uneven stress is likely to occur due to uneven temperature field, which leads to deformation of the pole piece and uneven winding d...

AI Technical Summary

Problems solved by technology

[0002] The PPM value of the pole piece has always been an important control parameter in the production process of lithium batteries. If the control is not good, the cycle life and safety performance of the battery will be affected.

In the traditional pole piece baking method, the operator puts the cut pole piece in a vacuum oven for vacuum baking, during which nitrogen is filled every once in a while, and then vacuum baked, and the cycle is repeated many times. , this method has certain quality hidden dangers, and during the heating and cooling process of baking, uneven stress is likely to occur due to uneven temperature field, which leads to deformation of the pole piece and uneven winding during winding, and the product qualification rate is low, thus Affect production efficiency and product qualification rate

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