I want to try to build a battery i found on EBAY

[Marc Gore]

I have diagram of welding on 1 side but not the other was hoping I could get some help so I do not short the whole thing out . How do I weld side 2 any help would be appriciated

I will add a diagram I started but am just not sure

 

[Altaman]

If you are looking to build batteries here is a book specifically on doing that:

DIY Lithium Batteries: How to Build Your Own Battery Packs: Toll, Micah: 9780989906708: Amazon.com: Books

DIY Lithium Batteries: How to Build Your Own Battery Packs [Toll, Micah] on Amazon.com. *FREE* shipping on qualifying offers. DIY Lithium Batteries: How to Build Your Own Battery Packs

www.amazon.com

 

[Marc Gore]

I have this book but this is a different type of build and I was hoping someone could help me with the schematics of how to weld the other side I do not trust myself... but thanks

 

[rich c]

No offense Marc, but I'd like to understand the mind set of building something with that potential for safety issues when you have no experience. I understand the need for a budget point, and you have to start somewhere to learn, but the memories and my home are worth more than I'd save building a DIY battery.

 

[Marc Gore]

I am keeping it safe away from my home in a shed I built out behind my house over 200 ft away I have built a number of batteries already without any issues,, was just hoping someone might help me with this one and no offence taken

 

[harryS]

How's the Vruzend you built? Ever get it to work?

52v triangle battery shutting down once hits 53v

I have a 48 v 1000 w rear wheel kit on a mountain bike . I built a triangle 52 v battery from the book sold on you tube was told most 48 v bike kits can take the 52 v battery just increases power and longevity but the battery fully charged is 58.6 v and the bike runs great once the battery...

electricbikereview.com

 

[Marc Gore]

Yes the controller i have for the 1000 watt motor just shuts it down works for 6- 7 miles for about 4 cycles but only discharged down to 52 .6 V every time now the controller shuts it down as soon as I pull the throttle everything powers up and then turns off as soon as I hit the throttle so I have a new controller from the manf. for this unit on the way so figured I would just make a 48 V battery to match it but I can't figure out the welding pattern on the back side of the above battery build I could prob figure it out I'm just being lazy hoping I can save some time letting someone who knows for sure help

 

[harryS]

And you're going to build anothet Vruzend? 117 cells? I would think that last go-around would have convinced you that the system isn't good mechanically to hold big batteries together.

 

[Marc Gore]

No I am going to weld it

 

[harryS]

Then you know how important it is to have a good diagram to follow. Wow, if you spot weld a cell in wrong and short circuit them, going to turn red hot while you frantically try to cut off the nickel strips. And if you short circuit a group of nine cells, it might be like fireworks going off.

Be careful. Don't be lazy. Good luck.

 

[Marc Gore]

could not agree more

 

[Explorer-1]

I also don't understand the OP. If you know how to build batteries and understand the principles and you think you already know how to connect the top, then the bottom is obvious. I'm scared that you would build a battery based on some diagram but not know absolutely it is correct. I wonder if you are skipping the BMS also, since if you don't understand how the battery is wired you wouldn't understand how to connect the BMS.

I'm sure I'm missing something since you said you've been down this road before, but...

Looking at that diagram we have a 9P battery, and since you said it was a 48V battery, in e-bike Li-Ion land that would be 13S, I didn't count the cells to confirm.