Method for preparing, storing, using and repairing battery or capacitor under negative pressure

Abstract

The invention discloses a method for preparing, storing, using and repairing a battery or a capacitor under a negative pressure. The method is implemented by adopting the technical scheme that: external connection devices of the battery or the capacitor are arranged at one even more positions of a battery or capacitor cavity, and comprise pipelines, valves, meters and the like, and the valves are operated to fulfill the aims of preparing, storing, using and repairing the battery or the capacitor under the negative pressure; the battery or the capacitor and the external connection devices thereof are arranged in an environmental control system of the battery or the capacitor, and are operated to fulfill the aims of preparing, storing, using and repairing the battery or the capacitor under the negative pressure; and the battery or the capacitor is used when the cavity thereof is internally in a negative pressure state. The method is particularly suitable for injecting electrolyte in situ to activate the battery or the capacitor in occasions, such as a using occasion, except a manufacturing plant of the battery or the capacitor into which the electrolyte is not injected to avoid the performance degradation, explosion risks and inconvenience of the battery or the capacitor in transportation and storage.

Description

technical field [0001] The invention relates to the technical field of batteries or capacitors, in particular to a method for negative pressure preparation, storage, use and repair of batteries or capacitors. Background technique [0002] Human beings have entered a new era of low-carbon and environmental protection. The new energy industry is the core component of the low-carbon economy, and energy storage batteries and capacitors are important components of new energy devices. The performance and quality of batteries or capacitors such as electricity and power directly affect the performance of new energy devices such as electric vehicles, and one of the key factors determining the performance of batteries or capacitors is their preparation, storage, use and repair process. [0003] At present, the preparation process of the conventional hard shell lithium-ion battery: the pole piece and the separator are wound or laminated in a certain way, put into the cavity, inject the...

AI Technical Summary

Problems solved by technology

Disadvantages of the above process method: use cotton wool, rubber, tape and other materials to seal the liquid injection hole. During the formation process, it is difficult to completely isolate the substances inside the battery cavity from the air and other substances in the external environment of the battery. Air contact, the chemical reaction inside the battery cavity is not only the redox reaction between the ideal battery active materials, but also the accompanying electrode active materials, electrolytes, etc. and various components in the air. Side reactions are also going on, and various reactants and products will poison the battery and deteriorate the performance of the battery

In this way, for the transportation and storage of some batteries and capacitors, there are often hidden dangers and performance degradation problems

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