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BMS Top or Middle
#1
Question 
Hi All,

Im goal is reach to 14s90p on my first battery... I have read that is recommended locate BMS in the middle of the stack or battery to have a distributed load/charge...

This doesnt sound 100% valid on my powerwall baby knowledge.... what is your opinion about this topic ?

P.D. = Batrium is out of the ecuation... not ready yet for that League


Regards,
CG
**************************************************************
Based in Panama

PV = 3 x 200W
Bat = GEL 250Ah
Feeding Fans / CCTV / Modem-Router / Android Boxes

Going on-grid
** 333 ** batteries harvested / getting GTILv2 1Kw auto sense 22-65V
Lots of items coming from china - usa

...Updating as progress flow...
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#2
Locate in what Sense? It should set om the battery between the battery and all appliances. No where else
The Ultimate DIY Solar and build place
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 100kWh LiFePo4 | 20kWh 14s 18650 |  66*260W Poly | ABB S3 and S5 Trip breakers
Upcoming: 14S 18650~30kWh
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#3
(07-11-2020, 07:08 PM)daromer Wrote: Locate in what Sense? It should set om the battery between the battery and all appliances. No where else

I forgot to mention that I will use PCB boards to stack the batteries
CG
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#4
PCB system aint a powerwall in My world Smile
You should hev it where its easily accessble. Where that is physicaly doesnt matter. Just beware that the electrical connection should be in the optimal place like oposite ends. Dont think the PCB design support that. In that case middle is best option
The Ultimate DIY Solar and build place
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 100kWh LiFePo4 | 20kWh 14s 18650 |  66*260W Poly | ABB S3 and S5 Trip breakers
Upcoming: 14S 18650~30kWh
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#5
Like daromer suggests, the main load current path through the packs should be evenly spread to avoid/reduce higher loading on some cells.
The BMS input & output connections are just that = input & output of the whole battery.
Balancing wire positions & lengths don't matter much because the currents are typically smaller.
Running off solar, DIY & electronics fan :-)
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#6
(07-12-2020, 11:43 AM)Redpacket Wrote: Like daromer suggests, the main load current path through the packs should be evenly spread to avoid/reduce higher loading on some cells.
The BMS input & output connections are just that = input & output of the whole battery.
Balancing wire positions & lengths don't matter much because the currents are typically smaller.

Thanks for your lights on this


daromer, sorry to botther your real powerwall peace  Sad
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#7
Smile No worries Wink
I just coulent help type what some thinks but Always look at ny smileys
The Ultimate DIY Solar and build place
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 100kWh LiFePo4 | 20kWh 14s 18650 |  66*260W Poly | ABB S3 and S5 Trip breakers
Upcoming: 14S 18650~30kWh
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