A temperature measurement and control system for high-temperature formation process of soft-pack lithium battery

Abstract

The invention discloses a temperature measurement and control system for a high-temperature formation process of a soft-pack lithium battery, relates to the technical field of temperature measurement and control, and solves the technical problem that the soft-pack lithium battery cannot be accurately divided before the high-temperature formation process in the prior art. According to the analysis, the soft-pack lithium battery is classified into different grades, and the real-time performance of the soft-pack lithium battery is analyzed, which can improve the accuracy of temperature measurement and control, and prevent improper temperature control, which will affect the service life of the soft-pack lithium battery and greatly reduce the temperature measurement and control. The working efficiency of the soft-packed lithium battery will be statically analyzed to prevent the performance parameters of the soft-packed lithium battery from changing, which will lead to errors in the capacity division and cause safety risks in the formation process of the soft-packed lithium battery; for real-time soft-packed lithium batteries The lithium battery is charged with a small current for the first time. The purpose of charging is to form a protective film on the surface of the negative electrode.

Description

technical field [0001] The invention relates to the technical field of temperature measurement and control, in particular to a temperature measurement and control system used in the high-temperature formation process of soft-pack lithium batteries. Background technique [0002] The soft-pack lithium battery is just a liquid lithium-ion battery covered with a polymer shell, and the structure is packaged with aluminum-plastic film. In the event of a safety hazard, the soft-pack battery will only bulge and crack at most. The formation of a lithium battery refers to After the battery is manufactured, the positive and negative materials inside the battery cell are activated by charging and discharging to improve the self-discharge, charge-discharge performance and storage performance of the battery. In the high-temperature formation process of soft-pack lithium batteries, temperature is crucial Therefore, temperature measurement and control is particularly important in the proces...

AI Technical Summary

Problems solved by technology

[0003] However, in the existing technology, the soft-pack lithium battery cannot be accurately divided before the high-temperature formation process, resulting in improper temperature control, which is likely to reduce the service life of the soft-pack lithium battery. The error of capacity division increases the safety risk of the soft-pack lithium battery in the process; the error of collecting temperature cannot be analyzed during the process, which leads to the change of the performance of the soft-pack lithium battery and reduces the operating efficiency of the battery

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