Floyd,
I was procrastinating while you took a stab at it
I really have on use for the batt/cells now, just bought it cuz it was cool, I want to be able to use it as is if possible.
Yes, we should be able to reverse engineer the bms.
My electronics chi is very low due to a decade of changing diapers and related tasks of being a single dad, I am not very well experienced in recognizing surface mounted components off the batt. I usually look up the chip number and read the spec and figure out what it does.
Problem 1 - Looks like Sarcos put some kinda paint/epoxy of the chip surface to HIDE the numbers before they applied conformal coating. The conformal coating looks like it was hand applied, makes sense as these are sample units for their prototype probably.
My girls have a UV flash light and a USB 40x microscope, would that help in reading the numbers?
I see 2 large chips which are probably the controller chips, from reading on EEVBLOG, here and other most BMS now use a controller chip which voltage sense and puts the bms in sleep mode and other functions that can be programmed.
Question - Can anyone identify the 2 rectangular chips marked Items 1 and 2 in the pics below?
TI MCUs are square shaped, from what I have seen in other battery bms with advanced features.
Switching + pole -
3 sets of 8 pin mosfets are used to switch the positive pole.
why 8 pin mosfets?
1st bank is switch via a NTC, I am guessing that is the thermal protection bank
2nd ? (witch craft?)
3rd bank ? (batt/cell voltage switched?)
Physical construction:
Looks like there is some GLUE at the bottom holding the batt module to the bottom of the case, I too took off all outer screws once the I took off the top.
I was expecting the batts unit to drop off the case once I inverted it, but no dice,
I used 2 screw drivers to pry at the edges and I got the negative end to come up few mills and heard a loud crack.
Charging:
I did not see any charging ports, so I guessing the discharge ports are used to charge these.
5 pin connector:
My 5 pin connector is covered in some yellow glue, pretty nasty hard stuff, I tried to scrape it off with my manly nails, no dice.
Request: Floyd, if you are going destroy the bms, could you do me a fav and scrape off the glue around the 5 pin connector and take a pic pls.