I am waiting for the BMS to arrive. It is the Smart BMS from AliExpress. The 100A version. It was also supposed to arrive last week.Which BMS are you using?
I am waiting for the BMS to arrive. It is the Smart BMS from AliExpress. The 100A version. It was also supposed to arrive last week.Which BMS are you using?
Yes, I ordered the Bluetooth module along with the BMS.I will be very interested in how that works out for you. I'm ready to pull the trigger on a similar setup, but I want to have the BMS in hand before the batteries show up so I can start testing immediately. I have a few small test orders in to AliExpress and it is very hit and miss as to how long a particular order takes to arrive. Best of luck with your deliveries. Did you get the bluetooth module with the BMS? It seems like that is a part that can be hard to get, but you really need it to manage the config.
Thanks for the info.
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Yes, I ordered the Bluetooth module along with the BMS.
I definitely am disappointed that the BMS is running so far behind.
My power supply is supposed to be here tomorrow, so I can start applying loads and checking capacity at the cell level this week. I plan to set up an Arduino with a SSR to cut off the load when the voltage drops to my lower test limit.
Nice photos dswiggum, good luck with the assembly, let us know how your capacity testing goes. Leyte is a very famous battle ground of the war in the Pacific, my Dad went through the Philippines on his way to Kunming in China and spoke very highly of the brave Filipino people. All the best.Just got my batteries from Xuba. Shipped by ocean freight to the Philippines. Very difficult during COVID. The Philippines is a mess to deal with right now. But everything is good. Amy is a real trooper. Check it out http://www.jfprinters.com/Batteries.html
Just got my batteries from Xuba. Shipped by ocean freight to the Philippines. Very difficult during COVID. The Philippines is a mess to deal with right now. But everything is good. Amy is a real trooper. Check it out http://www.jfprinters.com/Batteries.html
39 days from order to delivery in the Seattle area.
Excellent. I am also in WA and ordered from Xuba. When did you place your order?
June 7.
How are you planning to capacity test?
Put them in 16s, draw them down to 3.1 or so volts while watching carefully.
Put them in 16p, stick them on my powerlab8 in discharge mode, discharge to 2.90V. Let them rest. Discharge again. Let them rest again.
Now they are bottom-balanced, but you could do the same thing except in reverse and top-balance. (And you probably should, especially if you are using a balancing BMS.)
Put them back in 16s, charge them up while counting energy in, and watch the voltages. If any go wild too early, I have a weak cell that might need replacement. Otherwise, if they get to 100% of rated or better, call it a day.
It's easier to do some of those things with the help of an inverter/charge and a dedicated 3V battery tool (powerlab8). Also, I practiced in the past.