Forum: Power Management Systems

Battery over-discharge Cut Off Circuit

I used four NiCd batteries for one of my designs. Initially I faced a problem that whenever batteries got discharged lower than 0.7V per cell it damaged the cell.

So to prevent that I built in a cut-off circuit using Torex XC6120 Voltage Detector and a Power MOSFET as below

By this I was able to prevent the over-discharge of the batteries.

Does anyone know if the same cut-off circuit will work with the newly introduced silver-zinc batteries as well or I'd need to make changes to my cut-off circuit to accommodate this type of batteries?

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Sanjay Chawla

10/20/2008 - 2:49pm

# of views: 5991

# 1

Bruce Staple

October 20,2008 - 3:31pm

Silver-Zinc batteries provides 1.5V per cell and can be used in place of 3.6V Li-ion batteries with minor changes in firmwire and specs in power supply in order to handle lower voltage of Silver-Zinc batteries.

# 2

Brijesh Kumar

October 20,2008 - 3:48pm

Since the discharge cut off for Li-Ion batteries is 2.8V but for Silver-Zinc it is 1.2V, I think you will require a change in this circuit.

# 3

Mark Thomson

October 20,2008 - 3:58pm

XC6120 has a detect voltage range from 1.0V to 5.0V. This will work with the Silver-Zinc batteries too.

Source URL: https://www.engagez.net/posting/7974