6
Analytics
6.1
Statistics
For diagnostic purposes, system keeps track of various pre-defined battery and BMS operation statis-
tics and stores them internally. Each statistic, depending on its type, can consist of a corresponding
main value, additional value, and a timestamp. A list of all statistics is provided in Table 6.1.
Table 6.1: List of statistics and their descriptions
ID
Statistic
Description
1
Total discharge
The total amount of charge transferred out of the battery in Ah
(or kAh if normal range has been overflowed).
2
Total charge
The total amount of charge transferred into the battery in Ah (or
kAh if normal range has been overflowed).
3
Total discharge energy*
The total amount of energy transferred out of the battery in Wh
(or kWh if normal range has been overflowed).
4
Total charge energy*
The total amount of energy transferred into the battery in Wh (or
kWh if normal range has been overflowed).
5
Total discharge time*
The total amount of time when negative (discharge) current was
measured is seconds (or hours if normal range has been
overflowed).
6
Total charge time*
The total amount of time when positive (charge) current was
measured in seconds (or hours if normal range has been
overflowed).
8
Max Discharge Current
The highest recorded discharge current value. This statistic also
contains the timestamp of when the value was recorded.
9
Max Charge Current
The highest recorded charge current value. This statistic also
contains the timestamp of when the value was recorded.
10
Min Cell Voltage
The lowest recorded cell voltage. Additionally contains the cell
number and timestamp of when this value was recorded.
11
Max Cell Voltage
The highest recorded cell voltage. Additionally contains the
corresponding cell ID and timestamp of when this value was
recorded.
12
Max Cell Voltage Difference
The highest recorded difference between cell voltages.
Additionally contains the corresponding minimum and maximum
cell voltages, ID of the cell with minimum voltage, and timestamp
of when these value were recorded.
13
Min Pack Voltage
The lowest recorded battery pack voltage. Additionally contains
timestamp of when this value was recorded.
14
Max Pack Voltage
The highest recorded battery pack voltage. Additionally contains
timestamp of when this value was recorded.
15
Min external temperature
The lowest recorded external temperature. Additionally contains
the corresponding sesnor ID and timestamp of when this value
was recorded.
16
Max external temperature
The highest recorded external temperature. Additionally contains
the corresponding sensor ID and timestamp of when this value
was recorded.
17
Max external temperature difference
The highest recorded difference between temperature of sensors.
Additionally contains timestamp of when this value was recorded.
18
Under-voltage protection count
The number of times Under-Voltage protection has been
activated. Additionally contains the timestamp of the last
occurrence.
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