Automatic control system and control method for compaction density of pole piece

Abstract

The invention discloses an automatic control system for compaction density of a pole piece. According to the system, the coated pole piece passes through a rolling production line, production is controlled by a rolling production line control system, the surface density of the pole piece is detected by a double-face penetration type beta sensor, the thickness is detected by a double-face laser sensor, detection data is transmitted to the rolling production line control system via a data transmission network, the pole pipe is rolled through rolling rollers, a servo control system is installed on the rolling rollers for controlling the roller gaps, and a position detection sensor is installed on the rolling rollers for detecting the actual roller gap. The automatic control system for compaction density of the pole piece is simple in structure and reasonable in design, reduces artificial intervention on regulating of pole-piece rolling degree, and realizes automatic regulation, reduces the regulation hysteresis phenomena on pole-piece thickness and compaction density during production, realizes automatic stable controlling on compaction density during rolling of the pole piece, and is relatively intelligent. A novel rolling method for the pole piece is provided, and the control manner on pole-piece rolling production is expanded.

Description

technical field [0001] The invention relates to the field of battery manufacturing, in particular to an automatic control system for compaction density. Background technique [0002] Lithium battery is a kind of battery that uses lithium metal or lithium alloy as negative electrode material and uses 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 now become the mainstream. [0003] Lithium battery refers to the most basic electrochemical unit with lithium, including metal lithium, lithium alloys, lithium ions, and lithium polymers. Lithium batteri...

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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