Creating a 72V, 20s 5p Battery
I wanted to run some things by the community here. Our senior design is making an EV and we would like to do a 72V system. Using the LG 18650 cells could we create a 72V system. On here there are only kits that go up to 52V but If we use a different BMS but the cells and connectors from Vruzend, would a 72V system be possible?
We are looking at using a 20s and 5p arrangement to give us 72.7V and 17.5Ah using a total of 100 cells. The BMS that we plan on using is located here: http://www.batterysupports.com/72v-84v-20s-150a-20x-36v-lithium-ion-liion-lipo-battery-bms-p-296.html . The charger that we are looking at is located here: http://www.evassemble.com/index.php?main_page=product_info&cPath=3&products_id=7 . These are examples of components that we have found in our initial research.
We are learning throughout this process and would really appreciate all input and suggestions. Thanks.
Yes, a 20s configuration would definitely work. Just make sure that whatever battery you are building can handle the max current (A) needs of your motor/controller.
That BMS looks like it should do the job for you, but I don't see a 20s li-ion charger on that page. I only see a 20s LiFePO4, which is not what you want. You need an 84V charger for 20s li-ion. You might be able to get the 21s charger and tweak the output voltage lower with a potentiometer inside the charger - check with the vendor on that.