Real-time liquid injection monitoring and online analysis and determination system for lithium battery

Abstract

The invention relates to the technical field of liquid injection of power lithium batteries, in particular to the aspects of real-time liquid injection monitoring and online analysis and determinationfor a lithium battery. A weighing system used before primary liquid injection is involved and connected with a liquid injection system, and the liquid injection system is connected with a weighing system used after primary liquid injection. The weighing system used before primary liquid injection, the liquid injection system and the weighing system used after primary liquid injection are connected with an on-site control computer separately. Data generated by the on-site control computer is uploaded to an MES intelligent management system, and the MES intelligent management system is connected with SPC intelligent monitoring software. By adopting the structure, the qualification rate of the primary liquid injection amount is increased, online full-automatic intelligent detection and judgment are achieved in the primary liquid injection process, the labor cost is reduced, and therefore the production efficiency of the power battery is improved to the great degree.

Description

technical field [0001] The invention relates to real-time monitoring and online analysis and judgment in the process of injecting electrolyte solution into the battery case of a power lithium battery. Background technique [0002] Lithium-ion power batteries have been widely used in mobile communication equipment, portable mobile power storage equipment, mining power supplies, and electric vehicles due to their remarkable characteristics such as high energy density, high working voltage, long cycle life, and excellent safety performance. In recent years, with the rapid development of the field of electric vehicles, new lithium-ion power batteries have become a key factor in its development. In the production process of lithium-ion batteries, the amount of electrolyte injected into the single battery is the key to its production. Before the single battery is injected, it must go through code scanning, insulation resistance test, pre-weighing, electrolyte injection, Afterward...

AI Technical Summary

Problems solved by technology

The current method is that after the liquid injection is completed, the final weighing minus the front weighing is the liquid injection volume of the single battery. If the liquid injection volume does not meet the set process requirements, the robot will put the single battery into the liquid replenishment station. Perform rehydration, and then carry out the second weighing until the product is qualified. The extremely high rehydration rate of the battery electrolyte greatly reduces the efficiency of the liquid injection of the single battery. At the same time, the liquid injection capabilities of different liquid injection stations cannot real-time assessment

Although the secondary liquid replenishment can ensure that each single battery meets the required electrolyte, it cannot fundamentally prevent the occurrence of such problems. At the same time, it also increases the battery production cost and seriously affects the production efficiency in the primary liquid injection production process. and the first pass rate of the injection volume

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