The screenshot below shows the BMS Viewing software. Please note that this functionality is now included as part of the Profinity software suite provided by Prohelion.
The top section shows data from the BMU, while the lower section shows CMU data – one row per CMU.
The top row of BMU data presents the following information (left to right):
Minimum voltage cell in the pack, and its voltage. The example shows Node (CMU) 8, Cell 6 is minimum, at 3293mV
Maximum voltage cell in the pack, and its voltage. The example shows Node (CMU) 12, Cell 4 is maximum, at 3316mV
Minimum temperature cell in the pack, and it’s temperature
Maximum temperature cell in the pack, and it’s temperature
Total pack voltage
Total pack current
Balance threshold voltage
Balance threshold minimum voltage (balance voltage – hysteresis)
CMU count in system
The next row shows Precharge status information on the left:
Current state (Idle, Precharge, Run, etc)
Contactor 12V supply voltage presence (mV on v4 or older BMUs)
The bottom row in the BMU section shows the various status flags:
CMU Power supply OK
Any cell OverVoltage
Any cell UnderVoltage
Any cell OverTemperature
Any cell untrusted
CMU and vehicle timeout errors The right-hand side shows
Fan speed for both fans
SOC and Balance SOC in Ah
SOC and Balance SOC in %
The lower section of the program shows telemetry data from the CMUs, one row per CMU. The information shown is:
CMU Serial number
CMU circuit board (PCB) temperature
CMU external (cell) temperature
1–8 cell voltage measurements
The data is highlighted in various ways to quickly understand the system status
CMU serial number alternates between a white and light blue background each time a packet is received from that CMU
Trust errors for a cell voltage have a yellow background
Cells outside the min and max voltage limits have a red background
Cells currently balancing have a blue background
The minimum and maximum cells have bold text
Cells not present (where the CMU has been programmed to monitor less than 8 cells) have no text, and a mid-gray background
