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Ryobi 40V (10s2p 18650) BMS schematic (holding)

7803 Views 4 Replies 3 Participants Last post by  kennybobby, 
kennybobby
A Work in progress, just wanted to post some drawings in a placeholder thread until things get (hopefully) restored.

The cells' voltage gets measured by the O2Micro BMS chip, no surprise there. One surprise was that the charge and discharge FETs appear to be driven by the PIC micro and the BMS chip.

i'll just post this up for now and keep slogging thru the traces...

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lunacyworks
kennybobby said:
A Work in progress, just wanted to post some drawings in a placeholder thread until things get (hopefully) restored.

The cells' voltage gets measured by the O2Micro BMS chip, no surprise there. One surprise was that the charge and discharge FETs appear to be driven by the PIC micro and the BMS chip.

i'll just post this up for now and keep slogging thru the traces...
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How is this post related to
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Ryobi 40V BMS troubleshooting and repair

[edit] Someone posted about a reset procedure and i tried it with good results. The battery charged to full (4 bars) but wouldn't run the tool, until i pressed and held the button to display the bars, then after about 20 seconds the pack and tool were working again. Maybe it causes a reset or...
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Wouldn't this be a lot easier if you simply asked for a copy of the BMS chip's datasheet?

Also am scratching my head as to where you're going with all this?
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lunacyworks
remy_martian said:
Wouldn't this be a lot easier if you simply asked for a copy of the BMS chip's datasheet?

Also am scratching my head as to where you're going with all this?
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My question is if the OP kennybobby left this thread here in addition to the other thread for a reason?
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kennybobby
At the time this thread was created there were some issues with the forum software (update?) that were making images not available. i've copied this schematic over to the first post in the troubleshooting thread.

The OZ chip datasheet is unobtainium; the company is an offshore shell in the Cayman Islands--as if lots of manufacturing happens there
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