Method for container formation of unformed plate for power battery

Abstract

The invention discloses a method for container formation of an unformed plate for a power battery. The method comprises the following steps: 1, immersing: immersing a cured unformed plate: 1) carryingout a first immersion sub-step: immersing the cured unformed plate in a silica colloid-containing diluted sulfuric acid electrolyte having a density of 1.05-1.20 g / ml; and 2) carrying out a second immersion sub-step: immersing the immersed unformed plate obtained after the first immersion sub-step in a silica colloid-containing diluted sulfuric acid electrolyte having a density of 1.25-1.40 g / ml;and 2, drying: drying the immersed unformed plate obtained after the immersion step. The floating powder of the plate processed through the method is obviously reduced, and the performances of a battery assembled by using the processed plate are further improved.

Description

Technical field [0001] The present application relates to the field of methods for internalizing into a battery plate, and in particular to a method for internalizing a power battery into a plate. Background technique [0002] Polar plate formation refers to the process of using chemical and electrochemical reactions to transform polar plates into positive and negative plates with electrochemical characteristics. A large amount of acid mist and waste water are generated during the formation process of the traditional electrode plate formation process, causing serious pollution to the environment. With the increasing awareness of environmental protection, the internal formation process of batteries has become an industry development trend. However, some problems have been discovered during the production process of the internalized battery. On the one hand, the operating environment is polluted by the floating powder of the electrode plate, and at the same time, it is easy to cau...

AI Technical Summary

Problems solved by technology

However, during the production process of internalized batteries, some problems have been discovered one after another. On the one hand, the pollution of the working environment caused by floating powder on the plates is easy to cause short circuit due to the accumulation of lead powder at the bottom of the single cell electrode group; on the other hand, it is difficult to control the internal battery due to the formation process. Temperature, high local temperature will bring many adverse hidden dangers, such as: the formation of lead dendrites, the precipitation of lead paste additives on the plate, and the viscosity of the colloidal electrolyte on the surface of the plate due to uneven temperature Inhomogeneity, that is, uneven impedance, is not conducive to the formation effect and the distribution of colloidal electrolyte

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