A step-by-step method for forming a lead-acid battery

Abstract

The invention discloses a staged formation method of lead-acid batteries, which belongs to the technical field of lead-acid battery preparation. The formation is carried out in four stages. The first stage: charging until the battery voltage reaches 2.75-2.9V / cell, and discharging until the cut-off voltage is reached; the second stage: positive and negative pulse formation charging until the battery voltage reaches 2.75-2.9V / cell Single cell, discharge until the cut-off voltage is reached, and repeat the process several times; the third stage: carry out positive and negative pulse formation charging on the battery step by step in a manner of decreasing amplitude, until the density of the battery electrolyte reaches the set standard, and discharge until it reaches Termination voltage; the fourth stage: charging until the battery voltage is stable. By adopting the process of the invention, the formation time is shortened to 44 hours, and the formation efficiency is increased by more than 50%. The resulting plate has a tighter structure and better strength, and the 100% DOD cycle life of the battery is more than 450 times, which is more than 20% longer than that of ordinary batteries.

Description

technical field The invention relates to the technical field of preparation of lead-acid batteries, in particular to a step-by-step formation method of lead-acid batteries. Background technique At present, lead-acid batteries are still one of the most widely used batteries, and formation is an important step in the manufacturing process of lead-acid batteries. The quality of formation directly affects the performance of lead-acid batteries, and the power consumption in the formation process is huge. of. During the formation of lead-acid batteries, additives can be added to the formation plate or lead paste. If the additive is used properly, the electrochemical reaction in the formation process can be accelerated and the plate formation effect will be better. In addition to additives, the structure of the plate grid can also be improved. There is a grid with a carbon honeycomb structure, which can improve the formation effect; the use of ultrasonic waves can also promote th...

AI Technical Summary

Problems solved by technology

In the existing technology, continuous charging is usually used in the early stage of formation, but the battery will generate a lot of heat, resulting in an increase in the temperature of the electrolyte, loss of water, increase in the density of sulfuric acid, and a decrease in the formation efficiency. Moreover, the battery temperature is too high, which will affect the low temperature performance of the battery , on the other hand, if the temperature is too high, the resulting lead sulfate crystals are large, the polarization is large, and it is difficult to form