Pre-Charge Faults; Contactor Faults - Nuvation Energy NUV300-BC-12 Product Manual

stack_fault_charge_current_hi
▪
Fault that is triggered when any stack current is above the high charge fault threshold.
stack_fault_charge_current_under
▪
Fault that is triggered when any stack current is above the over charge fault threshold.

Both of these prior faults could trigger if the current shunt is not properly connected
or has not been configured for its proper measurement range.
10.1.4.1. Initialization Issues
The stack current is measured from the power interface subsystem's Analog Front End (AFE). The
following issues can contribute to these faults not initializing:
1. Power interface subsystem AFE is not enabled
2. Communication failure between the stack controller subsystem and power interface subsystem

10.1.5. Pre-charge Faults

stack_fault_precharge_timeout
▪
Fault that is triggered at the end of the pre-charge period if the measured current exceeds the
maximum pre-charge current
stack_fault_precharge_over_current
▪
Fault that is triggered at any time during the pre-charge connection period if the stack current
exceeds the fault threshold
10.1.5.1. Initialization Issues
These faults are directly related to the current faults detailed previously. Refer to
details.

10.1.6. Contactor Faults

stack_fault_coil_fail
▪
Fault that is generated when there is a difference between the commanded state of the
contactor coil and the observed state read from the hardware. This fault is a consistency check
on the drive state of the coil. This fault will trigger when contactors are unconnected or have a
short in their circuit. If the fault pilot signal is asserted, this fault will trigger and can not be
used to determine if there is a inconsistent contactor drive state.
stack_fault_contactor_feedback_fail
▪
Fault that is generated when there is a mismatch between the contactor state and the
contactor feedback signal provided. Note that the feedback is provided through a GPI.
Document ID: NE-PM-002
Nuvation Energy Low-Voltage BMS - Product Manual
164
Section 10.1.4.1 for
Rev 1.2, 2021-03-03
Curie Update 1