macribs wrote:Great work agnuism. You've clearly put a lot of thoughts into this. This will be the base for my first diy battery build.
Are the sound on the video somehow messed up? I can hear a lot of white noise, some low qual music in background but it seems impossible to hear your voice clearly. I will try again tonight when I am home, from the computer. Just tried from cellphone and it was difficult to hear your voice.
Youtube did not liked i have some music in the background, copyright, so instead of re filming, i had it remove the copyrighted song.
Another thing I noticed is you seem to forget that you are doing this video for battery newbies as well as more experienced builders. Two quick examples is when you use your voltmeter you place the voltmeter so you can see it the output, your camera should also capture the screen of the voltmeter. Same goes for when you put the completed module on the scale. Show the display and let people know what the weight is.
the scale was up to 2kg and it was out of range, nothing to show. Voltmeter is for me to see the polarity, not the viewer to see my module voltages cause its irrelevant. The video is about assembly.
As to the plus and minus sides of each brick, maybe you should consider to make some sort of color coding? So that when batteries are placed into the modules according to the color coding, one look at the color coding later on would let you know what is plus and what is minus. Just a thought for more ease of use.
Its up to user to mark their battery as they wish. I dont need it, i always double check with voltmeter. You can use a marker to place a dot near negative or positive side of the module.
One thing I struggled with is how to connect a BMS for monitoring, charging and cell balancing. It seems not possible to get each cell in balance? Maybe I am wrong, I admit I have yet to do my very own battery. I really hope you make a follow up video how to connect more similar sub modules into desire'd battery size, like 20s12p or even 20s18p for those with deeper pockets or in the need of more head space.
You need one wire per series connection for balancing. Its basic stuff, i should not teach that on the sales thread. There is plenty of info on ES in battery section.
Keep up your great work, I really think your system is state of the art.
Thank you very much, i am flattered