Charging 12volt jump pack with 5 volts

wsmm

Member
Wondering how the newer 12 volt jump packs using lithium batteries are able to be charged using 5 volts. If it was ac I could see the pack using a transformer in the pack to raise it to 12 volts, but how do they do it with dc?
 
(quoted from post at 07:58:16 05/08/23) Wondering how the newer 12 volt jump packs using lithium batteries are able to be charged using 5 volts. If it was ac I could see the pack using a transformer in the pack to raise it to 12 volts, but how do they do it with dc?

They use a ''DC-DC step up converter'' AKA ''boost converter'', which basically inverts the DC to AC, steps up the voltage, then converts is back to DC.

https://www.youtube.com/watch?v=9QM55r5fnUk

Video on the subject.
 
They basically just use the raw energy provided by a 5 volt source and convert it to the proper charging voltage. Pretty basic electronics actually

John T
 
wsmm,

My guess, never had one apart,
Is that there are 3, 4 volt cell packs. They are individually charged @ 4.2 volts each by the pack charger management system.


The packs are in series at the output leads, therefore the 12.6 volts

That's my guess!

Guido.
 
There is a switiching power supply/DC to DC converter inside. Mine also has a 5 volt output that was very useful when I had a power outage and needed to charge my cell phone.
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top