Preparing method of water system capacitor battery positive electrode

Abstract

The invention belongs to the technical field of power batteries and nickel-metal hydride batteries thereof, in particular to a preparing method of a water system capacitor battery positive electrode. The method comprises the steps of roll-welding the current collector used by the positive electrode to conductive strips in advance in the horizontal direction, then making the current collectors soak in battery size, conducting double-rolling sizing and the primary drying, pre-pressing and making the products soak in organic solution, conducting secondary drying, rolling to conduct forming, welding, cutting the products horizontally and vertically to make the positive electrode, wherein, the battery size is the mixture of CMC, conductive agent, adhesives, active substance and current collectors, the organic solution is the mixture of NMP, conductive carbon black and PDVF. According to the preparing method of water system capacitor battery positive electrode, the dense combination of the active substance and the current collectors is achieved, the preparation process is continuous and intelligentized. The conductivity of the electrode piece is hugely increased, at the same time, the mechanical strength of the electrode piece is increased. The produced positive electrode piece has a high mechanical strength, excellent flexibility and smoothness. The method can satisfy the ultrahigh current and ultrahigh power input and output requirements in the full service life cycle of the water system capacitor batteries.

Description

technical field [0001] The invention belongs to the technical field of power batteries and nickel-metal hydride batteries, and in particular relates to a method for preparing positive plates of water-system capacitor batteries. Background technique [0002] With the acceleration of urbanization, the construction of smart cities characterized by electrification is changing with each passing day. Aqueous capacitor batteries have the advantages of reasonable energy density and appropriate power density, wide operating temperature range, long cycle life, environmental protection, recyclability, and high safety. , light rail, high-speed rail, bullet train, etc. have broad application prospects. [0003] The preparation method of the positive plate of the existing power battery and its nickel-metal hydride battery is generally a wet drawing method, that is, nickel hydroxide is used as the main active material, HPMC, CMC, etc. are used as auxiliary thickeners, and SBR, PTFE, PVDF,...

AI Technical Summary

Problems solved by technology

However, there are many problems such as a lot of floating powder on the pole piece, low mechanical strength, and poor flexibility. It is difficult to meet the quality requirements of pure electric vehicles, high-speed rail, bullet trains, light rail, starting, and energy storage.

[0004] The positive electrode sheet is prepared by fully automatic gluing, powdering, and counter-rolling (patent number CN 101867045 B), which improves the powdering efficiency and the control degree of powdering amount. Poor flexibility; Ni-MH battery slurry is pre-configured with auxiliary glue (patent number CN 103794798 A), and the base tape is subsequently made into a mixed emulsion with binders such as PTFE, SBR and conductive agents such as nickel powder, and the surface of the base tape is sprayed in a single direction The negative electrode sheet is prepared by processing (patent number CN 103794759 A), the flexibility and gloss of the electrode sheet are improved, and the life is prolonged, but the shortcomings of the patent are low mechanical strength, poor flexibility, uneven dispersion of the water-based mixed emulsion, and poor permeability. while there is unequal coverage

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