Negative pole active material for lead-acid colloid accumulator cell

Abstract

The negative electrode active material for lead-acid colloid storage battery with long circulating service life, good charging and discharging performance and strong weatherability is a paste-like compound which is made up by mixing the following raw materials: (wt%) sulfuric acid 5-10%, deionized water 7-11%, short fibre 0.05-0.2%, modified lignin 0.02-0.10%, barium sulfate 0.1-1.2%, acetylene black 0.05-0.2%, SnO2 0.05-0.2% and the rest lead powder. The adoption of lead-acid colloid storage battery made up by said invention is applicable to energy storage for utilization of solar energy, etc.

Description

technical field [0001] The invention relates to a negative electrode active material composition of a lead-acid storage battery. Background technique [0002] VRLA batteries have been used as backup power sources in post and telecommunications, power systems and other occasions since the early 1990s in my country. The characteristics of their use are that they are usually in a floating charge state and are rarely used for repeated charge and discharge cycles. In recent years, VRLA batteries have increasingly been extended to cycle applications, such as solar energy storage applications, traction and electric vehicles. Its characteristic is that the storage battery has to undergo continuous charge and discharge cycles, and some need to be used in harsh environments, so VRLA batteries expose the problems of short cycle life and poor reliability, and limit their application range. [0003] Gel battery, because its electrolyte is colloidal, it has the chara...

AI Technical Summary

Problems solved by technology

[0005] The present invention will solve the problem that the active material of the lead-acid colloidal storage battery used for repeated charge and discharge cycles is easily passivated prematurely and cause the battery to fail. The material is used as a negative electrode paste, coated on the grid to make a negative plate used in lead-acid colloidal batteries, which can prevent premature passivation and deactivation of battery active materials, thereby prolonging the battery cycle life, and can reduce the internal resistance of the battery and improve Battery low temperature discharge performance