Antemony vs Calcium cells

[vinod]

What is the difference between the Antimony and Calcium cels.Please explain:?

 

[zog]

Different grid materials?

 

[jdsmith]

In a flooded vented lead cell the vast majority of the plate material is lead - antimony, calcium, and selenium are alloyed with the lead in small quantities to alter the discharge curve of the cells. For the user it makes very little difference what the alloying material is, you should just perform your load calcs per IEEE 1184 for UPS systems or IEEE 485 for Switchgear applications and find the best product to fit your application.

 

[mbeatty]

In a flooded vented lead cell the vast majority of the plate material is lead - antimony, calcium, and selenium are alloyed with the lead in small quantities to alter the discharge curve of the cells. For the user it makes very little difference what the alloying material is, you should just perform your load calcs per IEEE 1184 for UPS systems or IEEE 485 for Switchgear applications and find the best product to fit your application.

Great answer!!
Mark

 

[weressl]

What is the difference between the Antimony and Calcium cels.Please explain:?

• Lead-antimony batteries can be deep cycled more times than lead-calcium batteries.
• Flooded lead-antimony batteries require more frequent maintenance as they near end-of-life since they use an increasing amount of water and require periodic equalization charges.
• Lead-calcium batteries have lower self-discharge rates and will draw less current while on float charge than lead-antimony batteries.
• Lead-calcium positive plates may grow in length and width because of grid oxidation at the grain boundaries. This oxidation is usually caused by long-term overcharging, which is common to UPS and other batteries on constant-float changing. Grids may grow in size sufficiently to cause buckling or rupture of their containers.

(Credit to Engineers Edge, LLC)


In short, your application and its cycle duty will help you determine which suits your situation better. Ex. if you have a standby generator with a charger/UPS combination that kicks in shortly after loss of power, you virtually never will deep-cycle your batteries.

 

[vinod]

• Lead-antimony batteries can be deep cycled more times than lead-calcium batteries.
• Flooded lead-antimony batteries require more frequent maintenance as they near end-of-life since they use an increasing amount of water and require periodic equalization charges.
• Lead-calcium batteries have lower self-discharge rates and will draw less current while on float charge than lead-antimony batteries.
• Lead-calcium positive plates may grow in length and width because of grid oxidation at the grain boundaries. This oxidation is usually caused by long-term overcharging, which is common to UPS and other batteries on constant-float changing. Grids may grow in size sufficiently to cause buckling or rupture of their containers.

(Credit to Engineers Edge, LLC)


In short, your application and its cycle duty will help you determine which suits your situation better. Ex. if you have a standby generator with a charger/UPS combination that kicks in shortly after loss of power, you virtually never will deep-cycle your batteries.

Thank you very much