Electropaedia logo

Battery and Energy Technologies

 
Spacer
End cap
Finding your Way Around
Sponsors
Free Report

Buying Batteries in China

 
End cap

Spacer

Spacer

Green cap
Woodbank does not monitor or record these emails
Green cap
Spacer
Green cap
Green cap
Spacer
End cap
More Sponsors
 
End cap

 

* * *
*
* *

Nickel Iron (NiFe) Batteries

Characteristics

This rechargeable battery was introduced in 1900 by Thomas Edison. It is a very robust battery which is tolerant of abuse and can have very long life even if so treated. It is often used in backup situations where it can be continuously charged and can last for 20 years. Also called Nickel Alkaline of NiFe batteries.

The open circuit voltage of these cells is 1.4 V, and the discharge voltage is about 1.2 V.

Advantages

Very robust.

Withstands overcharge and over-discharge

Accepts high depth of discharge - deep cycling.

Can remain discharged for long periods without damage, whereas a Lead Acid battery needs to be stored in a charged state.

The ability of this system to survive frequent cycling is due to the low solubility of the reactants in the electrolyte - Potassium hydroxide (KOH).

Lifetime of 30 years possible

Shortcomings

Low cell voltage.

Very heavy and bulky.

The low reactivity of the active components limits the high rate performance of the cells. They cells take a charge slowly, and give it up slowly.

Low coulombic efficiency, typically less than 65%

Steep voltage drop off with state of charge

Low energy density.

High self discharge rate.

More pronounced Hydrogen gassing than Nickel-Cadmium

Applications

Traction applications

Fork lift trucks

Costs

Less expensive than Nickel- Cadmium cells

* *
* * *
*

 

History  

Cell Chemistry Comparison Chart

 

 

Print This Page || Home || FAQ || Site Map || Legal || Privacy Promise || Contacts

 
 
Woodbank Communications Ltd, South Crescent Road, Chester, CH4 7AU, (United Kingdom)
Copyright © Woodbank Communications Ltd 2005

Top