Precision over process
The lead battery industry has never been short on tradition. Paste mixing routines refined over decades, and a general wariness toward change that is, frankly, earned – consistency in plate manufacturing is hard to achieve and even harder to recover once lost. Yet something is shifting on plant floors globally, driven not by regulatory pressure or capital investment, but by a quieter force: the demand for measurable, repeatable quality at the raw material level.
At Hammond Group, two product trends stand out as reflections of where battery manufacturers are placing their confidence right now.
Pre-blended expander: the last holdouts come around
For most lead battery manufacturers, the transition to pre-blended expander happened long ago. The advantages have been well understood for decades, and most plants made the shift as pre-blended systems became widely available. But a small segment never fully converted – manufacturers and longtime consultants who maintained a firm belief in the traditional approach: individual raw material components, weighed by operators on the plant floor and added separately at the mixer.
The argument always carried a certain logic. Direct control, flexibility, and a process experienced operators knew intimately. For a generation of battery professionals who learned the craft hands-on, it was simply the way things were done – and done well enough.
What we are observing now is that this last group of holdouts is beginning to convert. In some cases it is generational: as veteran plant managers and operators retire, their institutional attachment to individual raw material addition retires with them. Younger engineers coming into those roles are less anchored to historical practice and more focused on measurable process control. They look at the variables introduced by manual weighing – scale drift, operator inconsistency, sequencing differences – and see unnecessary risk where expander loading rates are measured in fractions of a percent.
In other cases the conversion is simply about accuracy. Pre-blended expander fixes the ratio between barium sulfate, carbon black, and lignosulfonate – verified and consistent batch to batch. What arrives at the mixer is what goes into the paste, no interpretation required. For manufacturers scrutinising negative plate consistency more rigorously, that upstream accuracy is proving difficult to argue against.
Treated SureCure: redefining positive plate economics
On the positive side of the cell, manufacturers globally are reevaluating their curing processes against rising energy costs, tighter throughput demands, and the persistent challenge of consistent 4BS crystal structure in cured positive plates.
Tetrabasic lead sulfate (4BS) is well established as the preferred crystal structure for positive active material in long-life flooded and VRLA batteries. The challenge has always been generating it reliably. Many manufacturers have relied on high-temperature steam curing to drive 4BS formation – an approach that works in principle but carries real drawbacks. It demands substantial energy to sustain both heat and moisture levels, and critically, tends to produce inconsistent crystal sizes across the plate. That variability in crystal morphology translates directly into variability in positive plate performance.
Hammond’s Treated SureCure takes a different approach. By incorporating 4BS seed crystals into the leady oxide itself, SureCure provides a nucleation template that promotes consistent, controlled crystal growth during curing – without steam. Manufacturers are achieving uniform 4BS structures at lower curing temperatures, removing significant energy cost while improving process predictability.
The downstream benefits compound from there. Consistent crystal size yields better charge acceptance in the finished plate, reducing the energy and time required during formation. Savings materialise at two points – in the curing room and in the formation circuit. Global uptake continues to grow as more plants validate these results, and in an environment where energy costs are elevated and throughput pressure is real, the combination of steam-free curing, lower temperature profiles, and faster formation is a compelling package.
The underlying theme
What connects these two trends is the same logic: manufacturers are investing in raw material solutions that deliver more control over outcomes previously left to process management. Neither requires capital investment in new equipment – both fit existing processes and deliver results in the metrics that matter: plate consistency, formation efficiency, and throughput. In an industry where marginal gains accumulate into competitive advantage, that is a purchasing decision that speaks for itself.
