Very rapid recharging of large VRLA cells

Author

Giess, H.

Author_Institution

Oterlikon Statioary Batteries Ltd., Aesch, Switzerland

fYear

2000

fDate

2000

Firstpage

749

Lastpage

754

Abstract

The high rate charge behavior of 2V 1000 Ah VRLA cells, subsequent to a full 12 minute rate discharge, is described. Charging rates with current equal to I₁₀, 3I₁₀ and 7I₁₀ were evaluated for their influence on cell and connector temperatures and gas evolution. The result show that high rate charging, at the 3I ₁₀ rate, can restore the UPS autonomy time within 1 hour without excessive cell heating and gas emission. The thermal imaging of the cells during the discharge and charge event allowed to detect the sites of maximum heating and heat transfer effects

Keywords

battery chargers; heat transfer; infrared imaging; lead acid batteries; telecommunication power supplies; thermal analysis; uninterruptible power supplies; 12 min; 2 V; Pb; Pb-acid secondary cells; UPS autonomy time; cell temperature; charging rates; connector temperature; gas evolution; heat transfer; high rate charge behavior; large VRLA cells; thermal imaging; very rapid recharging; Asia; Batteries; Connectors; Heat transfer; Life estimation; Life testing; Telecommunications; Temperature; Uninterruptible power systems; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Energy Conference, 2000. INTELEC. Twenty-second International

Conference_Location

Phoenix, AZ

Print_ISBN

0-7803-6407-4

Type

conf

DOI

10.1109/INTLEC.2000.884332

Filename

884332