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Old 11-17-2019, 06:57 PM   #1
cmysstailights
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Default 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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Old 11-17-2019, 07:11 PM   #2
Rurki
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Default 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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Old 11-17-2019, 07:23 PM   #3
Jkerle
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Default Re: Adding 2nd set of 7 module

Quote:
Originally Posted by cmysstailights View Post
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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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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Old 11-17-2019, 07:57 PM   #4
cmysstailights
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Default Re: Adding 2nd set of 7 module

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Originally Posted by Jkerle View Post
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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Old 11-17-2019, 07:58 PM   #5
cmysstailights
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Default Re: Adding 2nd set of 7 module

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Originally Posted by Rurki View Post
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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Old 11-17-2019, 08:07 PM   #6
Jkerle
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Default Re: Adding 2nd set of 7 module

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Originally Posted by cmysstailights View Post
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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Old 11-17-2019, 08:19 PM   #7
cmysstailights
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Default Re: Adding 2nd set of 7 module

Something to.do since the cart is apart

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Old 11-17-2019, 08:51 PM   #8
Sergio
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Default Re: Adding 2nd set of 7 module

You need to split the pack as 8 + 6 modules.
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Old 11-18-2019, 06:58 AM   #9
cmysstailights
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Default Re: Adding 2nd set of 7 module

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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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Old 11-18-2019, 07:13 AM   #10
DaveTM
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Default 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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