¶ Shunt SoC% Settings
Administrative screen for the WatchMon supervisor hardware, and how to understand the various fields available to configure the hardware Shunt State of Charge settings.
Navigate to the screen via the Hardware Menu option and choose the Shunt tab. Editing is only available when in 'Technician' mode.
¶ Edit Mode Overview
- Specify the battery capacity Ah.
- Save.
¶ Field Definitions
¶ Type
The type of shunt used can be selected. ShuntMon2 500A 650V 50uOhm is the one that comes with starter kits. The shunt simulator allows testing without a shunt.
¶ Nominal Capacity
Nominal capacity in Ah as specified by the cell manufacturer.
The total "Nominal Capacity" should be updated as you add more cells to your pack. For example if you have 100Ah cells and adopt 4 in parallel, you should write 400Ah. When in series the capacity does not increase.
¶ Reverse Orientation
ON/OFF switch regarding the orientation of the batteries, can be enabled when the current reading needs to be swapped due to the physical orientation of the shunt not allowing the typical wiring path. When enabled this will allow the reading to show as discharging when it would have previously been showing as charging.
¶ Idle Current Threshold - Charge
Low Threshold for idle current when charging, only available in advanced mode.
¶ Idle Current Threshold - Discharge
Low Threshold for idle current when discharging, only available in advanced mode.
¶ Re-Calibrate in Bypass
ON/OFF to allow reset of SoC% to Full if going into Bypass. Only available in advanced mode.
- For LongMons or BlockMons — This is achieved when all cells are in bypass greater than the final bypass current.
- For CellMate-K9, WM5, WM7, and MM8 — This is achieved when the daily session minimum mAh bypass session has been achieved for all cells and in bypass at the voltage threshold.
¶ Re-Calibrate Low SoC
ON/OFF to allow a reset of the State-of-Charge back to empty (0%) if it goes below this value. Only available in advanced mode.
¶ Re-Calibrate Hi SoC
ON/OFF to allow a reset of the State-of-Charge back to full(100%) if it goes above this value. Only available in advanced mode.
¶ Empty SoC% Cycle Threshold
Threshold of State of Charge that when goes below and returns to full will count towards a discharge cycle. Only available in advanced mode.
¶ Full SoC% Cycle Threshold
The threshold for the State-of-Charge that when goes above from empty threshold will count towards a discharge cycle. Only available in advanced mode.
¶ Voltage
Current shunt sensor reading for Voltage.
¶ Current
Current shunt sensor reading for Current.
¶ Power
Current shunt sensor reading for Power.
¶ State of Charge
The current state of charge.
¶ Celcius
Current shunt sensor reading for Temperature.
¶ Serial Number
The serial number of the Shunt module.
¶ Ticks
Communication activity with shunt module related to RX / TX traffic.
¶ Recent Consumption
Recent Nett position in Ah. Seen also in Metrics.
¶ Daily Session Total
Daily charge and Discharge amounts in Ah.
¶ Daily e-Meter
Daily power usage in kWh.
¶ Capacity Remaining
Capacity till Full and Empty.
¶ Time Remaining
Duration at current levels till full or empty.
¶ Action Button / Process Link Events
¶ Status RX
Flashes as status telemetry is received (hover over will display time received).
¶ Setup RX
Flashes when setup configuration is received (hover over will display time received).
¶ Metrics SoC%
To change the State of Charge ( SoC% ), this can be done manually and directly via the Hardware Shunt configuration and by selecting “Metrics”.
You can move it to Full, Empty or any value of your estimation.
¶ Nominal Capacity
This is the initial guess/estimate of the capacity
¶ Accumulation Counter
This counts Ah going in and out of the Shunt. Capacity is the last number of Ah between full and empty.
¶ State of Charge
You can change the current SoC%.
¶ SoC Cycles
This is the number of cycles completed since startup.
¶ Full
Pressing sets the current state to full.
¶ Empty
Pressing sets the current state to empty.
¶ Extra Parameters
Brings up Registers dialogue. This adds filters to smooth the SoC readings.
¶ Filter Options
¶ Registers
Brings up Registers dialogue. Many of the items available using the Metrics button can be accessed here too.
¶ Volt Ratio, Current Ratio, Energy Ratio, Thermal Ratio, Power Ratio, Consume Ratio
All these are measurements relating to the specific ShuntMon.
¶ Accumulation
Nett position of Accumulation Counter.
¶ Capacity
The capacity of the Accumulation Counter.
¶ Serial Number
The serial number of the Shunt module.
¶ Manufacturer Code
Manufacturer's Code of the ShuntMon
¶ Part Number
Part Number.
¶ Version Code
Version Code of the firmware.
¶ PNS
¶ Edit Button
This button opens fields to editing, only available when in Technician mode.
¶ Undo
Restores values to last saved values and returns to read-only mode.
¶ Save
Saves values into the system and returns to read-only mode. This only works when connected by a USB. If saving whilst connected via WiFi the following Error message appears.
¶ Default
Restore values to default.
¶ Advanced
Allows editing of more advanced fields.
¶ Metrics
Opens up the Metrics SoC% Dialog.
¶ Support Tip
Pressing this button calls up the knowledge base on this screen.
¶ Change SoC% Calibration
Note: Our SOC% Sensor includes a Shunt block and a Shunt PCB. The Shunt block is +/-0.5% tolerance while the Shunt PCB components are +/-1% tolerance. The two parts are combined together to form the SOC% Sensor. It is calibrated using standard stable references in a ten-point calibration. If you separate the two, the values would be useless as they work as a pair.
When you initially set up the system you have to put in an initial guess as to the state of charge, when it top balances (bypass complete) or if full or empty, it improves the initial estimate that you put in and gradually gets better.
In particular, the Metrics dialogue allows you to update the current guess or override and tell the system that the current point is full or empty.
