Beginners Guide to Processing 18650 Cells | Cell Database


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TinyBMS
#11
I've got one on order, it's going into my eboard, I'm making it with a swappable 7S and 10S pack that'll be plugnplay to the BMS. Only needing 1 BMS for multiple voltage configurations or even chemistries is actually quite cost effective. Smile
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 CyberWall #1 DC2DC 7S80P 2300mAh avg Cell #2 DC2AC 7S80P 2200mAh avg Cell LG MF1
Chargers: 1xEV-Peak CQ3 400W 4 Chan(with DIY 6S cradle allowing 4x6S1-3P) 7x Foxnovo 4S  -- 20xTP4056
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#12
Cool you'll have to let us know how it goes
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#13
I was very tempted to get one myself. I have a smaller project that need one and Batrium is a bit to big for that hmm Smile
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Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
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#14
I see from a google search that the tinybms was sold in a couple other forums as a group buy last year but didn't see much else being posted about it.
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#15
Then I would guess that it works. generally you hear more about a product if it fails than the other way around Smile
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Follow me! >> YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
Upcomming: 14S 18650~30kWh | Automatic trip breakers, and alot more
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#16
Scepterr, I'm interested to see what you think of TinyBMS. They failed to respond to any of my emails.
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#17
Any updates guys? How's the tiny BMS treating you?
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#18
I am surprised at how few options there are out there. I am an opensource guy and the thought of using Microsoft(esp connected to internet) does not appeal to me one bit, I am sure Batrium are great guys but I want to see the code, .net=yucky. An Arduino or arm board would be a fraction of the power requirements and way less chance of something going wrong(update/virus). Better yet an esp8266 solution could just host a webpage allowing configuration. Just need a breakout board, voltage divider and something for balancing.
If anyone comes across anything please pm me. Batrium looks very nice but closed source, .net and dedicated windows machine isn't my cup of tea.
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#19
(10-25-2017, 10:59 AM)Everythings-stuck-together Wrote: I am surprised at how few options there are out there. I am an opensource guy and the thought of using Microsoft(esp connected to internet) does not appeal to me one bit, I am sure Batrium are great guys but I want to see the code, .net=yucky. An Arduino or arm board would be a fraction of the power requirements and way less chance of something going wrong(update/virus). Better yet an esp8266 solution could just host a webpage allowing configuration. Just need a breakout board, voltage divider and something for balancing.
If anyone comes across anything please pm me. Batrium looks very nice but closed source, .net and dedicated windows machine isn't my cup of tea.

It sounds easier than it is, i'm working on something just like this and have it working for the monitoring part and need to implement the balancing but it's a bit clunky.
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#20
I have working 14 1S balancers with ESP8266, sending data to grafana since more than a month, when I have a decent result I will post the info, there are many factors to consider and some errors I made like cable thickness and a low resistance resistor that made to fluctuate voltage when activate the resistor as you can see in picture 1 (above graph is from a pack with 2.2 Ohm resistor and below is from 2x2.2Ohm resistor in series and a thicker cable), that makes the charger fluctuate too while charging a doesn't go to float state.

But as you can see in picture 2 it balances, after 3 days you can see how the yellow pack, pack 10, balances.

   

   
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