Thread: Low cost BMS
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Old 07-14-2011, 10:55 PM   #34 (permalink)
harlequin2
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Here's a picture of my prototype board connected to a TS40 cell. Its a combination of SMDs and TH parts but the production version will be all SMD with the parts mounted on the top side. I've used 1205 parts to make assembly easy and if you've never tried a surface mount board, this is the one to cut your teeth on! Large parts, plenty of space, you can hand solder it without any trouble.
My pcbs should be here pretty soon and I'll build a whole heap for the car, plus a few over.
The pcbs from China cost .85c each, plus initial tooling and freight makes my first 100 come out at about $1.65 each. All the other parts add another $3.30 per board, so its still under $5. Not bad if you have to make a hundred or two.
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