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10
BOUNDARY LIMITS
The boundary limits that are used by the master for the battery modules are listed in this chapther.
A level will be triggered when a boundary condition is true for a defined period of time.
Battery thresholds are compatible with the following master BMS firmware versions or higher:
Master HV 1.13 or higher
Master LV 1.23 or higher
10.1
Slave BMS
Boundary limits for the slave BMS are defined to keep the battery within the manufacturer
specifications.
The tables with the boundary limits consist of:
Name, description of the situation;
Action, action on respond of the boundary, set/clear or failsafe;
Boundary condition, contains a value that is needed for an action in combination with the
time. This depends on the master strategy setting, default or performance;
Time that the boundary condition has to be present before it will be triggered. Times
indicated with “+” start counting if the previous boundary condition above is set.
Cell voltage
Table 15 Cell voltage boundary limits slave BMS
Boundary condition
Name
Level
Default
Performance
Time
Almost charged
Set
>= 3950 mV
>= 4150 mV
10 sec.
Clear
< 3900 mV
< 4100 mV
10 sec.
Charged
Set
>= 4050 mV
>= 4200 mV
+10 sec.
Clear
< 3950 mV
< 4150 mV
10 sec.
Over voltage warning
Set
>= 4150 mV
>= 4225 mV
+20 sec.
Clear
< 4050 mV
< 4200 mV
20 sec.
Over voltage critical
Failsafe
>= 4200 mV
>= 4250 mV
+5 sec.
Almost discharged
Set
<= 3225 mV
10 sec.
Clear
> 3275 mV
10 sec.
Discharged
Set
<= 3000 mV
+10 sec.
Clear
> 3225 mV
10 sec.
Under voltage warning
Set
<= 2800 mV
+20 sec.
Clear
> 3000 mV
20 sec.
Under voltage critical
Failsafe
<= 2700 mV
+5 sec.
