Profile

The profile design plays an important part in the spacing of components in lead-acid batteries. As its name suggests, the separator acts as a barrier between the positive and negative electrode. The spacing in between the two components is guided by the profile design. Daramic offers many profile combinations that can meet most any battery design requirement need.

Formula

In support of the chemical reaction that takes place inside of a lead-acid battery, the material formulation of the separator provides key benefits and can be adjusted depending upon the battery application. Properties adjusted through the formula include permeability, porosity, pore size distribution, electrical resistance, antimony suppression, ionic conductivity, and chemical compatibility within the electrolyte.

Lamination (Optional)

A key failure mode of some battery types is active material shedding. Laminates, which can be attached through adhesion are typically a glass material fiber available in various thicknesses which act as a support in maintaining active material on the electrode. Additional benefits of lamination include acid mixing and mechanical stability.

Form

Daramic’s production flexibility allows delivery of a finished product that aligns with customer manufacturing needs. Separators can be provided in the following forms (with or without laminated material):

• Jumbo Roll
• Slit Roll – state- of-the art slitters deliver uniform width control
• Cut Piece –cut to requested width and length using quality controlled choppers for repeatable, consistent results
• Envelop or sleeve – mechanically sealed, which allows easier insertion of the electrode