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-   -   Adding 2nd set of 7 module (https://www.buggiesgonewild.com/showthread.php?t=158956)

cmysstailights 11-17-2019 06:57 PM

Adding 2nd set of 7 module
 
Im toying around the idea of getting another 7 modules to make up 14. Only issue is on my cart they would have to be 2-7packs. Has anyone done this or is everyone using inline 14pack.

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Rurki 11-17-2019 07:11 PM

Re: Adding 2nd set of 7 module
 
What bms are you using? Two 7 modules would be easy to connect with 2guage wire and convert to 14. It depends on how you connect them. You also have to think of charging and space.

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Jkerle 11-17-2019 07:23 PM

Re: Adding 2nd set of 7 module
 
Quote:

Originally Posted by cmysstailights (Post 1670237)
Im toying around the idea of getting another 7 modules to make up 14. Only issue is on my cart they would have to be 2-7packs. Has anyone done this or is everyone using inline 14pack.

Sent from my SM-G960U using Tapatalk

It can be done. Just use really big cable to connect the two packs.

The only concern Ian at zeva had was potential voltage drop on the tap wires for the BMS. To mitigate the effects of voltage drop make sure the tap wires are all the same length. This ensures the cells will be truly balanced.

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cmysstailights 11-17-2019 07:57 PM

Re: Adding 2nd set of 7 module
 
Quote:

Originally Posted by Jkerle (Post 1670241)
It can be done. Just use really big cable to connect the two packs.

The only concern Ian at zeva had was potential voltage drop on the tap wires for the BMS. To mitigate the effects of voltage drop make sure the tap wires are all the same length. This ensures the cells will be truly balanced.

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Thats my concern to, using 1 bms for both packs.

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cmysstailights 11-17-2019 07:58 PM

Re: Adding 2nd set of 7 module
 
Quote:

Originally Posted by Rurki (Post 1670239)
What bms are you using? Two 7 modules would be easy to connect with 2guage wire and convert to 14. It depends on how you connect them. You also have to think of charging and space.

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I run a zeva bms

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Jkerle 11-17-2019 08:07 PM

Re: Adding 2nd set of 7 module
 
Quote:

Originally Posted by cmysstailights (Post 1670254)
Thats my concern to, using 1 bms for both packs.

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It will work but try your best to get the new cells really close to the same voltage as your old ones maybe set them up on the bench and wire up the bms/charger and get them balanced before mating them. This will save your BMS alot of time and heat exposure.

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cmysstailights 11-17-2019 08:19 PM

Re: Adding 2nd set of 7 module
 
Something to.do since the cart is apart

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Sergio 11-17-2019 08:51 PM

Re: Adding 2nd set of 7 module
 
You need to split the pack as 8 + 6 modules.

cmysstailights 11-18-2019 06:58 AM

Re: Adding 2nd set of 7 module
 
Quote:

Originally Posted by Sergio (Post 1670266)
You need to split the pack as 8 + 6 modules.

Was gonna see if you knew how. With the pack being split, how does the zeva bms get hooked up

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DaveTM 11-18-2019 07:13 AM

Re: Adding 2nd set of 7 module
 
I ask a question along the same lines awhile back. http://www.buggiesgonewild.com/lithi...ld-happen.html

I'll be following this as I also want to "add" an additional 7 modules to my cart.


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