The BMS Carrier controls the fans and relays, logs the voltage, current, temperature and relay states, and detects overcharge, overcurrent, overtemperature and undercharge states.
New Suggestions
Replace inrush current limiting (ICL) circuit with the one on UV cutoff.
Replace inrush current limiting (ICL) circuit with the one on UV cutoff.
Simpler
Cheaper
Reduce number of Fans
Currently we have eight- 2 fan controllers each control 4.
High voltage interlock loop
Requires changes to all other HV boards ( MCI, DC-DC, solar)
Not priority considering time constraints
https://uwmidsun.atlassian.net/wiki/spaces/ELEC/pages/2972418049/BMS+Carrier+MSXV
Major ICs
Buck Converter (12V to 5V)
IC REG BUCK 4.5V TO 17V, 5A, SYNCHRONOUS STEISOSPI COMM
TPS565201DDCT
Not in Stock on Digikey– Needs Replacement?
Replacements:
IC ISOSPI COMM INTERFACE LTC6820IMS#3ZZPBF (ISO_SPI_Interface)
Isolated Communications Interface 16-MSOP
Not in Stock on Digikey– Needs Replacement?
Replacements:
Couldn’t find a good replacement in Stock. Will continue searching.
Might be able to get sample from company website.
IC PULSE XFMR 1CT:1CT 350UH SMD (ISO_SPI_Interface)
PT61018AAPEL-S
IC HSD Dual-Channel 40V 1KOhm (high side driver to kill switch)
TPS2H000-Q1
Not in Stock on Digikey– Need Replacement?
Replacements:
https://www.digikey.ca/en/products/detail/stmicroelectronics/IPS2050HTR/15814430
(will check schematic again for exact requirements)
MCP23008T-E/SS (Firmware Contactor Control)
IC I/O EXPANDER I2C 8B 20SSOP
Not in Stock on Digikey– Need Replacement?
Replacements:
https://www.digikey.ca/en/products/detail/microchip-technology/MCP23008-E-P/735951 (through hole)
https://www.digikey.ca/en/products/detail/nxp-usa-inc/PCF8574ATS-3-118/812958 (100KHz)
https://www.digikey.ca/en/products/detail/nxp-usa-inc/PCF8574ATS-3-118/812958(400KHz)
IC REMOTE THERMAL CTLR 24QSOP (Fan Controller)
G6RN-1A DC12 Omron Relay SPST
Not in Stock on Digikey– Need Replacement?
Replacements: