10s6p x2 or 20s6px1

Batteries, Chargers, and Battery Management Systems.
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nalu808   10 µW

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10s6p x2 or 20s6px1

Post by nalu808 » Jun 04 2021 12:18am

I am planning to build a battery pack. Would it be better to build two 10s6p and hook them up in series or one 20s6p? If I did the 10s, I would buy a 10s balance charger and have no BMS. As for the 20s, I would run a BMS on the pack to balance charge them. All thoughts and opinions are welcomed.
Last edited by nalu808 on Jun 05 2021 12:38am, edited 1 time in total.

john61ct   100 GW

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Re: 10s6p x2 or 20s6px1

Post by john61ct » Jun 04 2021 7:15am

Sticking to 10S units or less, means the ability to use hobby chargers for balance charging, a great way to go.

In series becomes 20S to get high voltage.

One 20S BMS is best, just wire it so easily removed.

Or do without, a pack level LVC is good enough if you are conservative and balance regularly.

Wiring two 10S BMS in series can be fraught.

nalu808   10 µW

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Re: 10s6p x2 or 20s6px1

Post by nalu808 » Jun 05 2021 12:38am

Anyone can recommend a good 20s BMS?

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flippy   10 MW

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Re: 10s6p x2 or 20s6px1

Post by flippy » Jun 05 2021 5:16am

Always go with the higher voltage. Controllers only care about amps. So a 50A controller delivers double the power at 72V compared to 36V.
The bitterness of low quality remains long after the sweetness of low price is forgotten

999zip999   100 GW

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Re: 10s6p x2 or 20s6px1

Post by 999zip999 » Jun 05 2021 9:09am

I have a 24s A123 pack for 8 years as two 12s split in triangle and rear with 4-6s balance wires for ez monitoring and balance. Just bulk charge and check rarely do I balance or need to. I have a 20s 6p Samsung 40t with BT BMS but haven't got the BMS to show individual cell voltage yet. It sounded good on paper but I can't get it to show individual cell voltage. I wish for those balance wires like 4 - 5s balance wires. If you run a big pack 20ah or more is ez to monitor. I also have a spaim08 20s 1p 8ah no BMS big heavy square and cheap 4 - 5s balance wires . With quality cells make it ez to monitor. Even at 8ah. I only get 7ah out of it. Safely.

fatty   10 kW

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Re: 10s6p x2 or 20s6px1

Post by fatty » Jun 07 2021 3:34pm

flippy wrote:
Jun 05 2021 5:16am
Always go with the higher voltage.
2x 10s in series = 20s...

fatty   10 kW

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Re: 10s6p x2 or 20s6px1

Post by fatty » Jun 07 2021 6:38pm

nalu808 wrote:
Jun 04 2021 12:18am
I am planning to build a battery pack. Would it be better to build two 10s6p and hook them up in series or one 20s6p? If I did the 10s, I would buy a 10s balance charger and have no BMS. As for the 20s, I would run a BMS on the pack to balance charge them. All thoughts and opinions are welcomed.
Definitely two 10s packs so you can balance charge them instead of relying on a BMS.

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