peeling a couple of onions
@ OE, syseng, and mm
Thank you all for the good zodiac research and explanations about the contactor and the second coil/auxillary contact. i tried to sign up on their customer support site to download technical info but haven't been given access yet.
In the latest JTSB report on page 10 is a schematic showing the Hot Battery Bus (HBB) downstream of the Bigass Diode Module (BDM) on the Main Battery positive terminal. The HBB connects to the Captains 28V DC Bus (CAPT) thru the Main Battery Relay (MBR). What is operational function and criticality of the Captains Bus?
Also does anyone know if the FDR data for the ANA/Japanese event is available online similar to that found on the NTSB docket for the Boston event?--it would be interesting to see what the Main battery current signal shows before and while the pack was shorted to ground thru the case.
i thought it was an interesting finding by JTSB that cells 4 and 5 in the Main pack were basically intact with no broken current collectors inside and the pressure relief valves had not opened, unlike cells 1-3 and 6-8.
Some of the lithium battery experts in the electric car world have set up trickle charging experiments to determine how long it takes for a cell to go thermal from overcharging--but none are yet using a LVP-65 Yuasa cell.