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rechargeable battery life degradation

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kiruthikar

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What does battery life degradation mean?
If my battery has full voltage capacity of 12V in the perfect condition, will the degradation reduce the voltage capacity to less than 12?
 

The voltage won't be much reduced but the Amp Hour capacity will. What battery chemistry are we talking about?
 
KJ6EAD said:
The voltage won't be much reduced but the Amp Hour capacity will. What battery chemistry are we talking about?
Click to expand...

I have a rechargeable lithium - ion battery of capacity 4.2Ah (11.1V, 48 Wh).
If I want to monitor the charge level 100%, what parameter should I track? Is it the voltage level of 11.1V?
 

kiruthikar said:
I have a rechargeable lithium - ion battery of capacity 4.2Ah (11.1V, 48 Wh).
If I want to monitor the charge level 100%, what parameter should I track? Is it the voltage level of 11.1V?
Click to expand...

You need to track the AH level of the battery(mean to say the power).
 

sam185 said:
You need to track the AH level of the battery(mean to say the power).
Click to expand...

How can i track the Ah level? Which parameter of the battery should i use to calculate the Ah?
 

Are you just looking for a way to determine how much power your battery has left each time you use it or trying to determine it's long term capacity loss as it ages?
 

KJ6EAD said:
Are you just looking for a way to determine how much power your battery has left each time you use it or trying to determine it's long term capacity loss as it ages?
Click to expand...

Given that the full voltage level of the rechargeable battery does NOT reduce over time (due to degradation), I'm looking to find how much power the battery is left with each time i use it.
 

Battery fuel gauge circuits are made for Li-Ion: **broken link removed** or you could make a simpler bar graph type volt meter using this IC: **broken link removed**. Since most of the discharge curve for a Li-Ion cell happens in a 1V range (per cell) **broken link removed**, yiou could set up a bar graph from 10.2V to 12V in 0.2V steps, 9.3V to 12V in 0.3V steps or whatever works for you.
 

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