A method for testing the acid saturation of an AGM battery

Abstract

A method for testing the acid saturation of an AGM storage battery, comprising the following steps: weighing the battery: weighing and recording the weight M1 of the battery before adding acid and the weight M2 of the battery after formation; replenishing acid: replenishing excess dilute sulfuric acid to each cell of the battery, Record the mass of supplementary acid in each cell m 补 and the total acid supply quality M3; vacuuming: put the battery into a vacuum box and keep the pressure at ‑0.09Mpa for 60s, and pump out the gas inside the battery; pumping acid: use a suction tube to extract the electrolyte above each single cell electrode group; All the pole groups are lifted vertically, pull out the pole group after standing still, extract the electrolyte at the bottom of the battery tank, and record the acid pumping mass of each cell m 抽 and the total acid pumping mass M4; calculate the battery saturated acid absorption A, saturation B, and single cell saturation C according to the formula. The invention can accurately measure the saturated acid absorption amount and saturation of the battery, and can reflect the difference in the saturation of each single cell, and is simple to operate, without complicated fixtures, and eliminates the influence of the deformation of the plastic shell on the saturation.

Description

technical field [0001] The invention belongs to the technical field of valve-regulated lead-acid storage battery production. In particular, the invention relates to a method for testing the acid saturation of an AGM storage battery. Background technique [0002] The acid saturation of the AGM battery is the ratio of the actual acid content of the battery to the 100% saturated acid content. The saturation directly affects the early performance and life performance of the AGM battery. Too low saturation will inevitably reduce the amount of electrolyte, resulting in insufficient battery capacity and premature failure due to lack of liquid during use; too high saturation will lead to blockage of oxygen recombination channels, oxygen cannot be smoothly recombined to the cathode, and the battery sealing reaction efficiency is very low. Low, causing the capacity of the battery to decay in the early stage. The control of saturation is of great significance to the production of AGM...

AI Technical Summary

Problems solved by technology

Too low saturation will inevitably reduce the amount of electrolyte, resulting in insufficient battery capacity and premature failure due to lack of liquid during use; too high saturation will lead to blockage of oxygen recombination channels, oxygen cannot be smoothly recombined to the cathode, and the battery sealing reaction efficiency is very low. Low, causing the capacity of the battery to decay in the early stage

The control of saturation is of great significance to the production of AGM batteries. The current method of using fixtures to measure the pressurized acid absorption of the separator to calculate the saturated acid absorption cannot truly reflect the saturated acid absorption under the actual pressure of the battery. Instead, drilling holes at the bottom of the cell is used. The measurement of saturated acid absorption by the method is greatly affected by the standing time, the end time is not easy to judge, and the measurement accuracy is limited