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Creating a 72V, 20s 5p Battery  

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TylerTF
New Member
Joined:3 weeks  ago
Posts: 1
29/12/2017 12:59 pm  

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.


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Micah (Vruzend Rep)
Street cred = 1 Ah Admin
Joined:9 months  ago
Posts: 243
11/01/2018 1:49 am  

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. 


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