Alerts
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| Signal Name | Description | Condition | Impact |
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Indicates a Battery Monitoring Board (BMB) reference voltage has continuously been out of bounds
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Any BMB reference voltage has continuously deviated outside the in-bounds threshold of the nominal voltage
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Other BMB voltage signals will be substituted given the reference voltage is unreliable
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Indicates valid data is missing for one or more stack voltages
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One or more stack voltages are continuously detected as invalid
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Stack voltage data is likely being substituted to replace invalid readings
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Indicates valid data is missing for one or more brick voltages
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One or more brick voltages are continuously detected as invalid
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Brick voltage data is likely being substituted to replace invalid readings
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Sets immediately on SPI comms errors for visibility into the health of the comms interface
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Communication error with the shunt asic on single SPI
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ShuntAsicFault is at risk of being triggered soon
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Passive reference is out-of-tolerance
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Passive reference is out-of-tolerance
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Passive thresholds are affected
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Shunt bar temperature is too high
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Shunt bar temperature is too high
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Battery pack HV will be blocked. Shunt may become physically damaged.
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The shunt measurement asic has a SPI communication fault or other internal fault
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Fault condition was set during SPI communications
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Shunt readings are stale
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FC contactor opened unexpectedly due to insufficient contactor drive voltage.
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Contactor control state exited CLOSED because of insufficient contactor power voltage.
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Vehicle will stop charging.
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FC contactor exited the economized state unexpectedly. Possibly insufficient coil drive current.
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Contactor control state exited CLOSED because either of the contactors exited ECONOMIZED.
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Vehicle will stop charging.
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Positive contactor is expected to be open but HV current is still present. Possible weld detected.
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Contactor state timed out of OPENING (and transitioned to AUX_MISMATCH) due to HV current not being low enough to open contactors.
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The pyro fuse may be deployed.
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Tried to close FC contactors but failed because a voltage match was not maintained.
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Contactor control state exited CLOSING due to voltage match being lost.
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FC contactors will remain open.
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Warns if the shunt current (discharge or charge) is above max current limit.
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The shunt current (discharge or charge) is above max current limit.
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The pack contactors will fast interrupt
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The shunt thermistor is not reporting as expected. Vehicle may be unable to drive or DC charge.
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Shunt thermistor reading is open circuit.
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Vehicle may be unable to drive. DC charging may be limited or unavailable.
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FC contactors were blocked from opening due to high current. Pyro deployed instead.
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Charge current is above threshold while trying to open FC contactors.
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The positive and negative pyro fuses will be deployed.
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The shunt thermal coefficient of resistance (TCR) calibrations are not being used for high voltage (HV) current sensing. The default shunt TCR coefficients will be used and current measurement accuracy may be reduced.
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The stored shunt bar resistance is invalid or the written gain is outside the allowed tolerance.
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The default shunt TCR coefficients will be used for high voltage (HV) current sensing. Shunt current measurement accuracy may be reduced.
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The programmed shunt bar resistance calibration is not being used for high voltage (HV) current sensing. The default shunt bar resistance will be used and current measurement accuracy may be reduced.
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The stored shunt bar resistance is invalid or the written gain is outside the allowed tolerance.
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The default shunt bar resistance will be used for high voltage (HV) current sensing. Shunt current measurement accuracy may be reduced.
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A communication interruption has been detected in the Battery Monitoring Board (BMB) chain
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A communication issue with the BMB daisy chain is detected
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May indicate a loss of BMB sensor data
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Data integrity loss due to Battery Monitoring Board (BMB) chain double break
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A prolonged communication issue with the BMB daisy chain that is known to cause a loss of BMB sensor data is detected
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BMB sensor data is likely being substituted to replace data missing due to the communication issue
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High voltage isolation is too low for the pack to be online
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Isolation is measured to be below the alert threshold while pack contactors are closed
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Pack may not come online
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Measurement of internal isolation (within the pack) is too low
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Internal isolation is measured to be below the alert threshold
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Pack may not come online
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