Battery Protecion PCB Recharging Question

[Dustin Bloomquist]

I am building a homemade solar powered battery pack for USB charging.  The design is to have a solar panel (with diode) connected to a 7.4v battery protection PCB then the battery pack connected to a volt monitor and a USB charging board that will accept a 7.4v input.  My question is involving the battery protection PCB and whether it will limit the size of battery pack I can use.

 

The pack I want to make is 2 sets of 18650 batteries that are connected in series to make two 7.4v packs.  Then I want to connect both of those in parallel to double my capacity.  These are very powerful 5300 MAh batteries and the PCB board I ordered is a PCB for 7.4 volt Li-Ion 18650/18500 7.2 volt battery packs.  It says over-discharge protection 3.5 A limit and overcurrent detection protection 10.5A-13.5A.

 

Will this work for such a large pack or will it limit the amount of recharge I can put on the pack?  That is if it has a 13 amp overcurrent limit and I have a battery pack that is 22000 MAh will it only give me 13000 MAh of capacity before the battery protection PCB cuts off the charger?

 

Thanks in advance for the help.

[Author]

Posts