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Relation between temperature and battery power consumption

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re_michel

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Please if someone have an idea about any Formula or relation between temperature and power consumption, also, between time and battery power consumption (like battery in mobile phone), any circuit or product that can be installed and give us the right values of level of life time of battery.

Thank you in advance
 

Generally low temperatures cause battery voltage to go down when loaded. If temp goes up then voltage tends to go up. The battery's useful life is not necessarily affected.

On the other hand too high a temperature is bad for batteries. Usually the battery's useful life is shortened to some extent.
 

Thank you very much BradtheRad for your answer, it's very helpful. So, i would like to design and get a figure of power consumption in battery in function of time (hours) and after in function of temperature, but i didn't find any formula or relation between them. Any help in this please.

Thank you.
 

Hi,

To me it´s not clear what exactely you are looking for. You talk about "power consumption"...but this is more related to the connected load than to a battery...
A battery isn´t meant to "consume" power. A battery is charged, it stores the charge and it is discharged...

google for "battery temperature", then just show the pictures.
You will find a lot of charts for batterys and the realtio to temperature:

* Voltage vs temperature
* charging cycles vs temperature
* livetime vs temperature
* capacitance vs temperature
and so on...

Klaus
 

power consumption in battery in function of time (hours) and after in function of temperature

Surrounding temperature is one influence, but even more important is internal battery temperature. The simple effect of current going through it raises its temperature. The more Amperes, the greater the heat. Therefore we wonder, which way does a chilled battery voltage go? Does it drop due to the load, or does it rise due to internal heat generated by current going through it?

The effect cannot easily be quantified. It's not easy to measure internal battery temperature. You have various sizes and brands and types of batteries. The battery might be in a confined compartment, etc.

Possibly the manufacture performs tests on new batteries, at various temperatures, reading battery voltage at light load only. It is pointless to test it at heavy load, because the factors above create so many unknowns. Furthermore heavy load quickly turns a battery into a used battery, not a new one.
 

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