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Fibres for reducing water loss and improving charge-acceptance of enhanced flooded batteries

Polymeric fibres have been used within Lead Acid Battery Plates for decades as a physical reinforcement of the plate. This is an important component which makes a significant impact on the performance; by reinforcing the plates, improving strength and rigidity to help combat severe road conditions and prevent plate failure via dislocation of the active material from the grid.

However, in recent times, due to the increase in power demands and the rise of lithium ion there are increased electrification demands on Lead Acid Batteries. Although polymeric fibres play a critical role in improving the stability of the lead acid battery plates, improving the potential life of a battery, they are inert materials and inhibit the charge acceptance of a plate (when compared to a plate without fibres present).

Goonvean Fibres have specifically developed GVFloc+C for LAB, a product that not only reverses the negative effect on charge acceptance on lead acid battery plates but actually has shown to improve this property by up to 19.4%, without having a negative effect on the physical benefits of the inclusion of fibres. Not only this but GVFloc+C can tackle another of the issues facing the LAB industry, namely high water loss. This new product has shown results reducing the water loss by 50% over 21 Days when compared to a typical polymeric fibre.

The impact on the physical performance of the plates has been tested via vibration of the plates to simulate road conditions and then dropped from a height (to simulate potential impact; e.g. pot hole, collision, etc.) and the level of paste that is dislocated is measured. In these tests, plates without fibre were shown to lose 35% of their active material, whereas plates reinforced with fibre lost <1% with comparable results between traditional polymeric fibres and GVFloc+C.

It is however in the electrical results where the real benefits are seen, where Charge Acceptance (measured using JIS D5301) a 19.4% improvement has been seen, when compared to a typical LAB Plate. This helps the batteries to accept a recharge and will promote less sulfation on the plates, providing a more efficient usage. Which is key in the current climate of high electrical demand.

As well as the benefits in reducing water loss, contributing to lower battery maintenance, longer life time due to minimal gassing and cooler battery temperature. Benefits have also been seen in the endurance of the plate and the reserve capacity all working towards delivering a high-performance EFB+C.

Goonvean Fibres has completed testing with leading LAB manufacturers, who are using GVFloc+C in their production, achieving consistently positive results. Goonvean Fibres will continue to support testing with manufacture specific formulations to reproduce these positive results & support the development of a new generation of EFB+C.

Christian Withers

Technical Manager, Goonvean Fibres Ltd

Christian Withers graduated from The University of Wales, Bangor with a BSc in Environmental Chemistry in 2010. Since then he has worked in a variety of R&D roles within Textile Science, with a focus on both product & process development, achieving his Lean Six Sigma Black Belt in 2014. Christian now works as the Technical Manager of Goonvean Fibres where he is responsible for the implementation of new materials, products, applications & processes.

Evgeni Anikeev

Monbat AD
Technological Department Manager