Best diode for use with ping batteries?

[lookingelectric]

I just got a new set of ping batteries (27V). One is 15AH, while the other is 10AH. I ordered a pair of diodes alongside the batteries, but it looks like they were not included.

I'd like to get these batteries in use without waiting for another shipment from China. Does anyone have any suggestions for an efficient diode that I can easily put in line with each battery so that they can be used in parallel? I'd like something that I can quickly buy from a US-based store (online or offline chain) so that I can get these going.

 

[dnmun]

why not just wire the 2 up in parallel without the diodes in series with each pack?

 

[liveforphysics]

With the same battery chemistry, and the same number of cells in series, you can directly tie them with no diodes. Underload, the lower Ri 15Ah cells will be having more current drawn from them than the 10Ah cells, but the strings will be transfering charge back and forth as needed during the unloaded times to keep the SOC on both packs in balance.

 

[lookingelectric]

Actually, I'm trying to avoid having the packs try to charge each other. I don't want any mis-charging as the small pack descends more quickly than the large one when approaching empty and If one cell goes bad, I don't want the other pack to go crazy trying to charge it.

why not just wire the 2 up in parallel without the diodes in series with each pack?

 

[dnmun]

they don't