stack_fault_ci_therm_consistency
▪
Fault indicating the difference between thermal readings on a Cell Interface is too large
sc_fault_ci
▪
Fault indicating there was an internal hardware failure on a Cell Interface
stack_fault_open_shunt
▪
Fault indicating the current shunt is open circuit
stack_fault_short_shunt
▪
Fault indicating the current shunt is short circuit
When experiencing difficulty clearing this fault, please refer to
10.1.7.1. Known Issues
10.1.7.1.1. Short Shunt Fault on Exiting Service Lockout
Issue
In rare occasions, the
stack_fault_short_shunt
can accidentally trip when powering on the Stack
Switchgear. If the contactors remain open and no current has flowed through the batteries, the
fault does not indicate a short on the current shunt. Note that this issue only occurs within a
minute of powering on the Stack Switchgear and faults that happen outside this window should be
investigated further.
Workaround
The operator of the Operator Interface can attempt to clear the fault as described in
10.1.7.1.2. Clearing the Short Shunt Fault Is Not Immediate
Issue
Clearing the
stack_fault_short_shunt
fault might not occur immediately.
Workaround
To determine when the fault can be cleared, read the values of the
stack_short_shunt_detector.voltage_activity_threshold
and
stack_short_shunt_detector.inactivity_envelope
registers. Wait until the value in the inactivity
envelope is smaller than the voltage activity threshold. At this point the
stack_fault_short_shunt
fault can be cleared. The maximum time required for the inactivity envelope to fall below the
threshold can be determined by reading the
stack_short_shunt_detector.activity_detection_time
register, with the value given in
μ
s.
10.1.7.2. Initialization Issues
The
stack_fault_cell_open_wire
,
stack_fault_therm_circuit_fail
,
stack_fault_ci_therm_consistency
, and
sc_fault_ci
can be uninitialized due to problems with the Link Bus. Refer to
for
further details.
Nuvation Energy High-Voltage BMS - Product Manual
Document ID: NE-PM-003
88
Rev 1.2, 2021-03-03
Curie Update 1