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I want to protect 2 18650 batteries with single DW01. The problem is how to increase the protection voltage on DW01 . I have read that I should use voltage divider on VCC pin. I just want to make sure 18650 wont turn into hand grenade.

HERE IS MY SCHEMATIC

schematic

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Long story short: The DW01 is, according to its datasheet (first line, first two words; emphasis mine) a

One Cell Lithium-ion/Polymer Battery Protection IC

If it had the capability to really protect two cells in series, they would've marketed it that way.

So, while you can certainly sense a situtation that is definitely overvoltage for both, you won't be able to sense the (likely) situation that one cell failed and you're now overloading the second.

So, your approach is inherently bad, and you should not use a DW01 to protect two cells. Simple as that. Wrong tool for the job.

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  • \$\begingroup\$ Thanks, so I should use onw DW01 for each cell separately .Right ? \$\endgroup\$ – Richard Ciglanský Apr 29 '18 at 19:32

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