Ensuring Optimal Ventilation for Secondary Standalone Power Systems: A Comprehensive Guide

When it comes to standalone power systems, one of the most common questions we at Valen receive is about gassing and ventilation requirements. Both Valve Regulated Lead Acid (VRLA) and flooded (vented) batteries generate hydrogen and oxygen during charging, which necessitates proper ventilation to ensure safety and efficiency. This blog will guide you through the essentials of maintaining adequate ventilation for your battery system.

Why is Ventilation Important?

All battery cells, whether VRLA or flooded, produce hydrogen gas during operation. Factors like boost charging, overcharging, or high temperatures can increase this gas release. Proper ventilation is crucial to mitigate the risk of hydrogen accumulation, which can be hazardous.

Reducing Gassing with VRLA Technology

Switching to VRLA batteries can significantly cut down gassing—by at least 80% compared to traditional flooded batteries. For even greater reductions, consider batteries with a Catalyst Life Extender. Valen’s EnduroGEL batteries feature these innovative components, which help recombine up to 80% of emitted gases, thus minimising the amount of hydrogen released.

How Does a Catalyst Life Extender Work?

Catalyst vents in batteries equipped with this technology are designed to handle extreme pressures and effectively recombine gases released during normal operations. This results in a more stable and safer battery environment.

Why Opt for a Catalyst Life Extender?

In regions like Australia, where temperatures can significantly affect battery life, a Catalyst Life Extender is particularly beneficial. It helps maintain the battery’s design life even at higher temperatures—crucial for ensuring long-term reliability and performance.

Ventilation Standards and Solutions

According to AS4086.2-1997, the average hydrogen concentration in a battery enclosure should be kept below 2%. To achieve this, you have two ventilation options: natural and forced.

• Natural Ventilation: This method uses vents, grilles, or holes to allow airflow through the battery system. It’s generally preferred due to its reliability. Ensure that apertures are properly sized and positioned to maintain effective airflow.
• Forced Ventilation: When natural ventilation is insufficient, forced ventilation with exhaust fans or air conditioning can be used. Install airflow sensors to trigger alarms if ventilation systems fail.
• Pipe Ventilation: Front Terminal batteries can be external ventilated by utilsing ventilation tubing. The tubing is connected to each individual battery and then externally vented taking the gases from the battery to the external environment.

For calculating ventilation rates and ensuring your setup meets standards, refer to the equations provided in AS4086.2-1997 for both forced and natural ventilation.

Need Help with Your Battery System?

For expert advice on ventilation solutions tailored to your battery project, contact the Valen team at 1300 734 253. We’re here to help you ensure your system operates safely and efficiently.