Low-temperature lead-acid battery cathode active substance and preparation method thereof

Abstract

The invention relates to a low-temperature lead-acid battery cathode active substance and a preparation method thereof. The low-temperature lead-acid battery cathode active substance is formed by adding a low-temperature additive into lead powder, an adhesive, sulfuric acid, de-ionized water, barium sulfate and lignin components, wherein the low-temperature additive consists of a tanning agent, an mimosa extract, vapor-grown carbon fibers and humic acid. The components in the low-temperature lead-acid battery cathode active substance are reasonably proportioned and optimally combined, and a complete and standard preparation method is adopted; and pole plates manufactured from the manufactured cathode active substance can be assembled into a valve-regulated lead-acid battery, so that the low-temperature capacity can be greatly improved, the low-temperature cycle life can be greatly prolonged, and the valve-regulated lead-acid battery is applicable to a low-temperature environment of minus 10-minus 40 DEG C.

Description

technical field [0001] The invention relates to a negative electrode active material of a low-temperature lead-acid battery used in a low-temperature environment and a preparation method thereof, belonging to the field of lead-acid battery production. Background technique [0002] With the continuous development of communication and energy storage fields, valve-regulated sealed lead-acid batteries are more and more applied to low-temperature environments, such as rural telecom repeaters in northern my country, alpine base stations, outdoor wind and solar energy storage applications, high-altitude Regions, etc. The valve-regulated sealed lead-acid batteries produced by the existing technology are used in the above-mentioned regions. In winter, the low-temperature capacity and cycle life will be reduced to below 70% of normal temperature in the environment below -10°C, and the low-temperature capacity in the environment of -40°C The cycle life will drop below 35% of that at ...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of communication and energy storage fields, valve-regulated sealed lead-acid batteries are more and more applied to low-temperature environments, such as rural telecom repeaters in northern my country, alpine base stations, outdoor wind and solar energy storage applications, high-altitude Regions, etc. The valve-regulated sealed lead-acid batteries produced by the existing technology are used in the above-mentioned regions. In winter, the low-temperature capacity and cycle life will be reduced to below 70% of normal temperature in the environment below -10°C, and the low-temperature capacity in the environment of -40°C The cycle life will drop below 35% of that at normal temperature. The main reason is that the negative electrode active material of the valve-regulated sealed lead-acid battery produced by the existing technology will drop rapidly as the temperature decreases in the low-temperature environment, and the charging performance of the battery will be affected. , which in turn affects the discharge performance of the battery, resulting in a decrease in the low-temperature capacity and cycle life of the battery. Therefore, the development of a negative active material suitable for use in low-temperature environments has become the key to valve-regulated sealed lead-acid batteries suitable for use in low-temperature environments.

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