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Is a large capacitor needed for a high load battery?

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eepty

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Is large capacitor needed for high load battery?

In my application, I have a Li-ion battery, which is 3-cells in series, 5000mAh, max. 30C discharge. I will switch on and off of a load about 22A. Do I need to add a large electrolytic capacitor at the battery? I have seen a design which has a 680uF capacitor at the battery.

Thank you very much.
 

Re: Is large capacitor needed for high load battery?

Hi,

it more depends on swtiching frequency and expected current rise and fall rate.

Klaus
 

Re: Is large capacitor needed for high load battery?

You need to know the Continuous Discharge Current rating of the battery. Further, you don't say what your timing is. A capacitor is only going to help for short pulses, not continuous current.
 

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