Global Sources
EE Times-Asia
Stay in touch with EE Times Asia
EE Times-Asia > Power/Alternative Energy
Power/Alternative Energy??

The lowdown on batteries: Lithium sulphur dioxide

Posted: 18 Aug 2014 ?? ?Print Version ?Bookmark and Share

Keywords:battery? lithium sulphur dioxide? AAA? Teflon? acetonitrile?

Another consideration: Especially after long storage and/or being subjected to low temperatures, the terminal voltage may dip suddenly at the first application of a load and then recover. The effect is similar to lithium-thionyl-chloride chemistries. (See The lowdown on batteries: Lithium thionyl chloride.)

Specific energy: approximately 250 Wh/kg
Energy density: approx. 400 Wh/L
Specific power: 15 W/kg (light loads)
Discharge efficiency: approx. 50-72%
Energy/consumer-price: 0.12 Wh/dollar
Service or shelf life: 10 years
Self-discharge: 0.25%/month
Cycle durability: primary battery/NA
Nominal cell voltage: 2.85 V (3.9 V with bromine monochloride added)
Open-circuit voltage: 3.0 V (varies by manufacturer)
Cut-off voltage: 2.0 V (varies by manufacturer and use)
Temperature: -55 to +70C (selected versions to -60C)

Anode: Li Li+ + e-
Cathode: 2SO2 + e S2O4
Overall: 2Li + 2SO2 Li2S2O4

Though the military has typically been one of the larger users of this battery type, I think one of the more interesting applications is inside a spacecraft named Huygens that landed on a moon of Saturn called Titan.

The representative illustrations below are for the Saft G 06/2 (0.95AH) battery.

Figure 1: Voltage at mid-discharge versus current and temperature (2.0V cut-off).

Figure 2: Typical discharge profiles at +20C.

Figure 3: Capacity versus current and temperature (continuous discharges, 2.0V cut-off)./i>

In my next column, we'll look at some more tips and tricks, and we will consider another battery technology. In the meantime, as always, I welcome any questions or comments.

About the author
Ivan Cowie is the Chief Engineer at MaxVision.

To download the PDF version of this article, click here.

?First Page?Previous Page 1???2

Article Comments - The lowdown on batteries: Lithium su...
*? You can enter [0] more charecters.
*Verify code:


Visit Asia Webinars to learn about the latest in technology and get practical design tips.

Back to Top