Temperature Consistency Check - Nuvation Energy NUV300-BC-12 Product Manual

stack_short_shunt_detector.ramp_detection_time
▪
The time constant of the filter used to detect rapid changes in stack voltage. The value also
represents the time required to detect these changes.
▪
Typically set to 10000000
stack_short_shunt_detector.filter_sample_count
▪
Used to adjust how much noise is filtered out to prevent false trips due to noisy signals
▪
A higher value will result in a greater amount of filtering
▪
Typically set to 100
stack_fault_short_shunt.thresh
▪
The minimum percent of faulty samples required to trip a short shunt fault
▪
These faulty samples are current and voltage measurements that do not correlate with each
other
▪
Typically this is set to 50
If the short shunt fault has tripped, it cannot be cleared by pressing Clear Faults until

the activity falls below its threshold. It may take several minutes for this transition to
occur. Refer to

7.10.9. Temperature Consistency Check

The temperature consistency check will calculate the maximum deviation between the smallest and
largest measured temperature on the Low-Voltage BMS. When using a Cell Interface expansion
module, the temperature consistency check also calculates the smallest and largest measured
temperature on the Cell Interface (independently from the Low-Voltage BMS).
If the deviation exceeds a configurable threshold value, a fault will be tripped.
stack_fault_ci_therm_consistency.thresh
▪
The maximum temperature deviation, in units of °C, that is allowed between thermistors of a
single Low-Voltage BMS or Cell Interface module
▪
Typically this is set to 15
In order to minimize this temperature deviation and prevent false trips, consider the following
recommendations below.
7.10.9.1. Recommendation for Temperature Consistency Check
There are two main factors that need to be considered when connecting the thermistors. First, it is
important to ensure that the thermal cooling environment for each of thermistors is similar. One
approach is to place the thermistors orthogonal to the cooling air direction.
Consider the following scenario where the cooling air flow is in the same direction as the installed
thermistors.
Document ID: NE-PM-002
Section 10.1.7.1.2 on how to work around this issue.
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Nuvation Energy Low-Voltage BMS - Product Manual
Rev 1.2, 2021-03-03
Curie Update 1