multiple Lipoly minty boost

Ideas and questions about MintyBoost kits

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zynex
 
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Joined: Tue Apr 30, 2013 3:26 pm

multiple Lipoly minty boost

Post by zynex »

I have been reading alot about the minty boost and the lipoly charging circuit.
The mintyboost works fine, but it's just not suitable for holiday since it's just underpowered. But I read the mintyboost can also be powered by a lithium ion polymer battery using this (http://www.adafruit.com/products/280) circuit.

My idea was to build a large charging station in an ammo box to use on holiday. Can this be achieved by connecting a couple of lipoly's in parallel to the charging circuit and then powering one or more mintyboost so that I have multiple usb outputs?

I would really appreciate it if somebody helped me out with this project and tell me if it's possible or if there are better solutions. I know there are expensive charging stations, but I like to create something myself.

Thanks in advance!

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adafruit_support_bill
 
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Joined: Sat Feb 07, 2009 10:11 am

Re: multiple Lipoly minty boost

Post by adafruit_support_bill »

In general it is not a good idea to connect batteries in parallel. Small differences in individual cell characteristics can result in one cell doing most of the work. At best, it can result in poor efficiency. At worst there can be battery damage or (in the case of lithium cells) even smoke and flames.

However, there are high capacity 'balanced' LiPo packs made from matched cells with a balancing circuit. One example is our 6600mAh pack: http://www.adafruit.com/products/353

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