Automatic compaction density control system and automatic compaction density control method

Abstract

The invention provides an automatic pole piece compaction density control system and an automatic pole piece compaction density control method. A grinding production line is used for passing of a coated battery pole piece; the production of the pole piece is controlled by a grinding production line control system; the surface density of a pole piece is detected through a double-faced penetration type beta sensor; the thickness of the pole piece is detected through a double-faced laser sensor; the detected data is transmitted to the grinding production line control system through a data transmission network; the pole piece is grinded through a grinding and rolling roller; a servo control system is mounted on the grinding and rolling roller to control a rolling roller gap; a position detecting sensor is mounted on the grinding and rolling roller to detect the practical rolling roller gap. The automatic pole piece compaction density control system is simple in structure and reasonable in design, manual interferences and adjustment to the pole piece rolling degree are reduced, and the automation adjustment is realized; lag phenomena to the adjustment to the pole piece thickness and the compactness density in a production process are reduced. In a pole piece grinding process, the compactness density is automatically and stably controlled, so that the equipment is relatively intelligent. The invention provides a novel pole piece grinding method which can be used for broadening a control mode of the polar piece grinding production.

Description

[0001] technical field [0002] The invention relates to the field of battery manufacturing, in particular to an automatic control system and control method for compaction density. Background technique [0003] Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. The earliest lithium battery came from the great inventor Edison, using the following reaction: Li+MnO2=LiMnO2 This reaction is a redox reaction, discharge. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have become the mainstream now. [0004] Lithium battery refers to the most basic electrochemical unit of lithium, including metal lithium, lithium alloy, lithium ion and lit...

AI Technical Summary

Problems solved by technology

If the compaction density is too large or too small, it is not conducive to the insertion and extraction of lithium ions

The traditional control method is that the operator manually detects the surface density of the pole piece and the thickness of the pole piece after rolling to calculate the compacted density. This method has certain hidden dangers in quality and operation hysteresis, which affects production efficiency and product qualification rate.

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