Understanding AGM and GEL Batteries: Key Differences and Applications

Valve Regulated Lead Acid (VRLA) batteries, including AGM and GEL types, are widely used in various applications due to their sealed design and maintenance-free operation. While both types share the same basic principle of oxygen recombination, there are significant differences in their construction, performance, and suitability for specific applications.

AGM Batteries

AGM batteries use a microporous glass mat separator to immobilize the electrolyte. This "starved electrolyte" design results in lower internal resistance and excellent high-rate discharge capabilities. However, AGM batteries can be sensitive to electrolyte depletion, which may lead to reduced capacity and shorter lifespan if not properly maintained.

GEL Batteries

GEL batteries, on the other hand, employ a gel-like electrolyte formed by mixing sulfuric acid with silica gel. This "flooded" design provides a larger electrolyte reserve and higher thermal capacity. GEL batteries generally have higher internal resistance compared to AGM batteries but exhibit superior oxygen recombination efficiency, often reaching over 95%. Moreover, they offer a longer cycle life, typically exceeding 12 years.

Thermal Runaway Risk

AGM batteries are more prone to thermal runaway, especially during overcharge or float conditions due to their smaller thermal mass. GEL batteries, with their higher thermal capacity, are more stable in high-temperature environments.

Choosing the Right Battery

The choice between AGM and GEL batteries depends on the specific application and environmental conditions. AGM batteries are well-suited for applications requiring frequent high-rate discharges, such as electric vehicles or uninterruptible power supplies. GEL batteries, with their longer lifespan and better thermal stability, are ideal for stationary applications and environments where water loss is a concern.

Huazhihang: Your VRLA Battery Expert

At Huazhihang, we offer a wide range of VRLA batteries, including both AGM and GEL technologies. Our experienced team can help you select the right battery for your specific needs. Contact us at 13360560504 for personalized technical advice and support.