openinverter forum

So on from my last post, i could discharge my high 60v pack some to bring it closer to the others.

Apart from the BMS, what others ways can i discharge it in a controlled way i.e. what loads might i use ?

thanks

I like to use my cheap Chinese grid tie inverter

ah good plan - thanks

If your goal is, that multiple packs have the same voltage at the end, you could connect all minus of the packs together, and between the plus some resistor. And just wait, they will balance perfectly. I do not know your voltage difference, but if this is just below 15V, you can simply use 12V lamps as resistors. If the lamp is off, the balancing is finished.

Plugging in a kettle or something would also work.

It would be safer to use a electronic load, I have used a Tenma 72-13210 120V 300W to discharge batteries to a known voltage, it took quite a while at only 300W though.

johnlr wrote: ↑Sun Apr 14, 2024 1:33 pm It would be safer to use a electronic load, I have used a Tenma 72-13210 120V 300W to discharge batteries to a known voltage, it took quite a while at only 300W though.

I think you could use that JK BMS with output and connect cell points so it will operate power transistors. Then connect a load like 6x 12V T4 light bulbs. They can draw 6x 55W = 330W. If you program JK BMS for a discharge limit you can go and sleep off .

Edit: or if you are impatient you can use 12V PTC heater from last gen. VW Golf...