Short Shunt Detection And Diagnostics - Nuvation Energy NUV300-BC-12 Product Manual

▪
Typically set to 50

7.10.8. Short Shunt Detection and Diagnostics

Nuvation Energy BMS can detect shorts in the stack current and stack voltage sensing circuit by
tracking the correlation between the stack voltage and stack current.
stack_short_shunt_detector.enabled
▪
Set to 1 to enable the short shunt detection algorithm
stack_short_shunt_detector.current_activity_threshold
▪
If a short circuit exists, the measured current would fall below this threshold value
▪
A typical value, reported in mA, can be calculated taking into account the fuse rating (I
the stack in amps
stack_short_shunt_detector.voltage_activity_threshold
▪
If voltage activity is detected above this threshold value, the detector looks for correlation
between the stack voltage and stack current.
▪
A typical value, reported in mV, can be calculated using the current_activity_threshold (mA)
determined above along with the stack resistance (R
If the value of the stack resistance is not known, it can be calculated using the cell resistance (R
Ω and the number of cells in the stack (N
stack_short_shunt_detector.current_time_constant
▪
The time constant of the filter used to remove noise in the current signal
▪
Typically set to 1000000
stack_short_shunt_detector.voltage_time_constant
▪
The time constant of the filter used to remove noise in the voltage signal
▪
Typically this is set to 1000000
stack_short_shunt_detector.activity_detection_time
▪
The settling time of the filter used to detect gradual changes in stack voltage The value also
represents the time required to detect these changes.
▪
Typically set to 1800000000
Document ID: NE-PM-002
Nuvation Energy Low-Voltage BMS - Product Manual
) in Ω
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Rev 1.2, 2021-03-03
Curie Update 1