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Zebra Batteries

Characteristics

High power, high capacity cells suitable for electric traction applications.

High Temperature Battery operating at over 270°C

Sodium Nickel Chloride (NaNiCl) chemistry giving a nominal operation cell voltage of 2.58 Volts

Advantages

High energy density (5 times higher than Lead acid)

Large cells (up to 500Ah) possible

Cycle life better than 1000 cycles

Tolerant of short circuits

Safer than Sodium Sulfur cells

Typical cell failure is short circuit which does not cause complete failure of the battery.

Low cost materials

Shortcomings

Suitable for large capacity batteries only (> 20KWh)

Limited range of available sizes and capacities. (Large multi-cell blocks)

Only one factory in the world produces these batteries.

High internal resistance

Molten sodium electrode

High operating temperature.

Preheating needed to get battery up to the 270°C operating temperature. (Up to 24 hours from cold)

Uses 14% of its own capacity per day to maintain temperature when not in use.

Thermal management needed

Applications

Traction applications, EVs, HEV, and Railway

Costs

Expensive

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Cell Chemistry Comparison Chart

 

 

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