Batteries and Accumulators
Created date:2023-10-21

Precipitated barium sulfate is utilized in the production of batteries, particularly in lead-acid batteries. Here are some applications of precipitated barium sulfate in battery manufacturing:


Grid Pasting 

Barium sulfate is commonly used as a component in the paste that is applied to the electrode grids in lead-acid batteries. The paste, typically made of lead oxide, sulfuric acid, and additives, helps form the active material on the grids. Barium sulfate serves as a filler in the paste, providing improved adhesion between the active material and the grid, enhancing the mechanical strength, and preventing the shedding or crumbling of the active material during battery operation.


Formation of Active Material

During the formation process of lead-acid batteries, a chemical reaction occurs between the active materials on the electrodes and the electrolyte, resulting in the formation of lead sulfate. Barium sulfate is often added to the active material mixture to regulate and control the formation process. It aids in the uniform formation of lead sulfate crystals on the electrodes, which is essential for the proper functioning and long-term performance of the battery.


Electrolyte Stabilization

Barium sulfate has a unique property of insolubility in sulfuric acid electrolyte used in lead-acid batteries. It acts as a stabilizer, preventing the precipitation and accumulation of impurities in the battery electrolyte. This helps maintain the chemical stability of the electrolyte solution, preventing any adverse effects on battery performance and extending the service life of the battery.


Density Adjuster

The specific gravity or density of the battery electrolyte needs to be maintained within a specific range for optimal battery performance. Barium sulfate, due to its high density, is added to the electrolyte solution to adjust and regulate its specific gravity. By accurately controlling the density, the battery's capacity, efficiency, and overall performance can be optimized.

Separator Coating

In some battery manufacturing processes, barium sulfate can be used as a component in separator coatings. The separator is a critical component of a battery that prevents direct contact between the positive and negative electrodes, while allowing the flow of ions in the electrolyte. Barium sulfate can be applied as a coating on the surface of the separator to enhance its mechanical strength, improve dimensional stability, and increase resistance to acid attack from the electrolyte.


Thermal Stability

Barium sulfate also offers thermal stability to batteries, especially in high-temperature environments. It helps minimize the degradation of battery components and extend the overall lifespan by providing insulation and preventing excessive heat buildup.


Sulfate Formation Control

Barium sulfate aids in controlling the formation of undesired sulfation in lead-acid batteries. Sulfation occurs when the active material, lead sulfate, accumulates and hardens on the electrode surfaces, limiting the battery's charging and discharging capacity. By incorporating barium sulfate into the battery's design, the formation of large and undesirable lead sulfate crystals is minimized, helping to maintain optimal battery performance.


Overall, the inclusion of precipitated barium sulfate in battery production serves various purposes, including enhancing electrode adhesion, regulating formation processes, stabilizing electrolytes, adjusting density, improving separator properties, providing thermal stability, and controlling sulfation. These benefits contribute to the overall efficiency, longevity, and performance of batteries in various applications.Fuhua has dedicated model which is specialized in batteries.