US AGY Glass Fiber Helps Terra Supreme Battery Achieve 4,000 Cycles

en.Wedoany.com Reported - AGY, based in Aiken, South Carolina, USA, announced that its S2 glass fiber has been used by Terra Supreme Battery Company of Albion, Indiana, in the manufacture of composite grids for a new Group 31 bipolar lead-acid battery.

Terra Supreme Battery combines pure lead with high-strength S2 glass fiber to produce dimensionally stable composite grids. According to the company, this glass fiber reinforcement is 10 times stronger than steel by weight, enabling the grid system within the battery to maintain structural integrity through repeated charge-discharge cycles. The reinforced composite grid technology also eliminates positive active material shedding—which Terra Supreme identifies as a major failure mode in lead-acid battery chemistry.

Patrick Hunter, Chief Commercial Officer and President of AGY, stated that S2 glass fiber was developed for applications demanding high strength, durability, and dimensional stability; Terra Supreme's innovative use of S2 glass demonstrates that advanced glass fiber reinforcements can help transform mature battery chemistries and address one of their most challenging performance limitations.

Terra Supreme's battery features a bipolar architecture with horizontally arranged plates, efficient internal current paths, and no traditional internal busbars. The battery is designed as a direct replacement for Group 31 batteries and operates without requiring modifications to existing charging systems. TSB Chief Technology Officer Benny E. Jay stated that the goal is to rethink the lead-acid battery; AGY's S2 glass fiber provides the strength and dimensional stability needed for the composite grid to structurally retain active material, extend service life, and unlock enhanced performance from a familiar and recyclable battery chemistry.

Terra Supreme reports that its Group 31 battery delivers 1,200 cold-cranking amps, 1,800 marine cranking amps, 3,000 pulse hot-cranking amps, 240 minutes of reserve capacity, and up to 4,000 cycles at 60% depth of discharge. The battery is designed for high-power engine starting and deep-cycle applications, spanning commercial vehicle transportation, emergency services, industrial equipment, agriculture, aerospace, military, marine, recreational vehicles, rail, and both off-grid and grid-connected energy storage markets.