What is colloidal lead-acid battery?

Colloidal lead-acid battery is an improvement of common lead-acid battery with liquid electrolyte. It uses colloidal electrolyte to replace sulphuric acid electrolyte, which is better than ordinary battery in safety, charge storage, discharge performance and service life.

What is a maintenance-free battery?

In the context of batteries, a maintenance-free battery is one with electrodes containing low, or no, antimony in the grid alloy. These batteries experience little loss of water during their life and thus normally do not require periodic 'topping up'. When discussing maintenance-free batteries, it is necessary to define first the term 'maintenance'.

How do you fill a lead-acid battery in an electric bicycle?

The colloidal lead-acid battery used in electric bicycle is filled between positive and negative plates of the battery by silica gel and sulfuric acid solution through vacuum perfusion in the AGM partition.

How does a maintenance-free battery work?

This evaporation leads to a decrease in the electrolyte’s volume, which requires topping up with distilled water occasionally to maintain the battery’s performance. In contrast, maintenance-free batteries are engineered to minimize electrolyte evaporation by trapping the water vapor within the battery case.

What are the benefits of a maintenance-free battery?

Another benefit is that the pressure-relief valves integrated into the design of maintenance-free batteries help regulate internal pressure. These valves open only when the pressure inside the battery exceeds a predetermined threshold, allowing excess gases to escape while retaining the water vapor within the battery.

Do maintenance-free batteries need antimony-free alloys?

Maintenance-free batteries require antimony-free alloys due to the need for charging at a voltage higher than that of the active masses' reactions, but below the voltage for water decomposition.