Ultra-low water loss high temperature resistant flooded lead-acid battery and preparation method thereof

Abstract

An ultra-low water loss and high temperature resistant rich liquid lead-acid battery and its preparation method, through the provided rare earth alloy positive electrode grid, pure lignin negative electrode formula, electrolyte density, PE separator structure, positive and negative electrode active material ratio The technical solution comprehensively reduces the water loss rate of lead-acid batteries, achieves the capacity matching of the positive and negative electrodes of the single battery, reduces the high partial pressure caused by the mismatch of active material, and aggravates gas evolution, reduces the water loss rate of the battery; reduces the plate Oxygen evolution potential; the negative electrode formula of pure lignin provided by the present invention uses lignin to replace humic acid, reduces the impurity content of the plate, reduces battery water loss, and does not reduce other performances. Through the application and optimization of grid alloy, process formula, electrolyte density and functional materials, the problem of rapid water loss of traditional flooded lead-acid batteries is improved.

Description

technical field [0001] The invention belongs to the technical field of accumulators, and in particular relates to an ultra-low water loss and high temperature resistant liquid-rich lead-acid accumulator and a preparation method thereof. Background technique [0002] The electrodes of flooded lead-acid batteries are mainly made of lead and its oxides, and the electrolyte is dilute sulfuric acid solution. Although the flooded lead-acid battery has low energy and short deep cycle life compared with lithium batteries and nickel-metal hydride batteries, due to its small self-discharge, superior high and low temperature performance, mature production and recycling technology, and low price advantages, this battery is still the first choice. One of the largest and most versatile starting power supplies in the world. [0003] The liquid-rich lead-acid battery is an exhaust-type design, which will produce electrolyzed water and water evaporation loss during use, especially in high-t...

AI Technical Summary

Problems solved by technology

[0013] 3) Process formula: ①The bonding strength of the lead paste is poor, the active material softens and falls off quickly, and the voltage shared by the unit active material in the later period is too high, resulting in intensified gassing; ②Battery charging acceptance is poor, and the charging utilization rate is low, which intensifies the hydrolysis reaction; ③The electrolyte is easy to stratify. After stratification, the internal resistance of the battery is relatively large, and micro-battery reactions occur, which intensifies hydrolysis

[0014] 4) Structural design: unreasonable labyrinth structure design, unreasonable exhaust design, etc. lead to excessive exhaust and water evaporation overflow; the mismatch of positive and negative electrode capacities of the single battery leads to high one-way partial pressure, intensified gas evolution, and battery Accelerated water loss

Images