Changes for page 3.3 Control

Last modified by Admin on 2025/04/09 12:14

From 2.1 to 1.4 From 11.3 to 11.2

From version 11.2

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on 2024/12/24 17:38

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on 2024/12/04 14:54

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--Battery management systems.BMS Main 3.3\. Configuration.WebHome
++drafts.bms-main-3.3\. Settings.WebHome

Content

@@ -1,14 +1,8 @@
--(% data-numbered-headings-start="3" style="--numbered-headings-start: 2;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
--= Settings =
++=== 3.3.1 Common settings ===
--(% data-numbered-headings-start="3" style="--numbered-headings-start: 2;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
--== Control ==
--
--=== Common settings ===
--
  To change the common BMS settings, select the "Control → Common settings" section:
--[[image:1735054851946-552.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
++[[image:1733322611547-671.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
  In this section:
@@ -16,10 +16,8 @@
  * Cell resistance – nominal (maximum) internal resistance of the cells, Ohm;
  * Relax time (after charging) – a relaxation time after charging, second;
  * Relax time (atfer discharging) – a relaxation time after discharging, second;
--* Reset parameters – a command to reset cells state of charge, capacity, and resistance;
--* Method of calculating the battery voltage:
--** Summation of cell voltages – the overall voltage is calculated as on sum of all cells in the battery;
--** Using voltage before contactors – the overall voltage is estimated as voltage before contactors measured by BMS.
++* Number of cycles – a number of charge-discharge cycles;
++* Reset parameters – a command to reset cells state of charge, capacity, and resistance.
  The values “Capacity”, “Resistance”, “Cycles” are used to calculate the SOC of cells and the battery.
@@ -33,7 +33,7 @@
  The “Reset parameters” command is used for starting-up and adjustment of the battery.
--=== SOC estimation ===
++=== 3.3.2 SOC estimation ===
  The BMS Main 3 device calculates the state of charge of the battery (SOC) using two algorithms:
@@ -44,9 +44,8 @@
  To change the estimation algorithm for calculating the battery SOC, select the "Control → SOC estimation → Algorithm" section:
++[[image:1733322611549-423.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="148" width="800"]]
--[[image:1735056107942-306.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="141" width="800"]]
--
  The following estimation algorithms supported:
  * Voltage – by open circuit voltage;
@@ -70,8 +70,7 @@
  * Minimal SOC – the battery SOC is assumed to be the minimum SOC among the cells;
  * Average SOC – the battery SOC is taken equal to the arithmetic average of the cell SOC;
--* Min-Max SOC – the battery SOC is calculated based on the minimum and maximum SOC of the cells. Final SOC will be a) 100% if any cell have 100% SOC, b) 0% if any cell have 0% SOC;
--* Max-Min SOC – the battery SOC is calculated based on the minimum and maximum SOC of the cells. Final SOC will be a) 100% if all cells have 100% SOC, b) 0% if all cells have 0% SOC;
++* Min-Max SOC – the battery SOC is taken based on the minimum and maximum SOC of the cells (recommended method).
  Other parameters:
@@ -85,9 +85,9 @@
  * Coulomb counting correction (temperature) – the dependence of battery capacity on temperature;
  * Coulomb counting correction (cycles) – the dependence of battery capacity on the number of charge-discharge cycles.
--=== SOC correction ===
++=== 3.3.3 SOC correction ===
--The BMS Main 3 device can recalculate the battery SOC after long-term storage or after long-term working in the case when the battery was not charged fully or discharged totally. Recalculation is done based on the tabular dependency Uocv = Uocv (SOC, t) (see [[SOC estimation>>doc:||anchor="HSOCestimation"]]).
++The BMS Main 3 device can recalculate the battery SOC after long-term storage or after long-term working in the case when the battery was not charged fully or discharged totally. Recalculation is done based on the tabular dependency Uocv = Uocv (SOC, t) (see section** **2.3.2).
  To configure parameters for periodically correcting the battery state of charge, select the "Control → SOC correction" section:
@@ -102,30 +102,22 @@
  * Ignore the linear zone – a flag to ignore linear SOC zone while correction (recommended to be unset);
  * Last correction timestamp – time when last correction was made.
--=== Resistance estimation ===
++=== 3.3.4 Resistance estimation ===
  Calculation of the resistance of cells is carried out in two ways. The first method is used when the battery passes from a relaxation state to a charge or discharge state, wherein the cell resistance value
--{{formula fontSize="SMALL" imageType="PNG"}}
--R = \frac{U-U_{ocv}}{I_{stable}}
--{{/formula}}
++R = (U-U,,ocv,,) / I,,stable,,,
--where U — the cell voltage measured in the charge or discharge state, V; U,,ocv,, — cell voltage measured in the state of relaxation (before switching to the state of charge or discharge); I,,stable,, — stabilized current through the cell in the state of charge or discharge.
++where U is the cell voltage measured in the charge or discharge state, V; U,,ocv,, is the cell voltage measured in the state of relaxation (before switching to the state of charge or discharge); I,,stable,, – stabilized current through the cell in the state of charge or discharge.
  The second method is used for a stepwise change in the current through the cell, while the value of the cell resistance:
--{{formula fontSize="SMALL"}}
--R = \frac{U_2-U_1}{I_{stable2}-I_{stable1}}
--{{/formula}}
++R = (U,,2,,-U,,1,,) / (I,,stable2,,-I,,stable1,,) provided that | I,,stable2,,-I,,stable1,, | > 0.2 × Q,,max,,
--provided that
++(Q,,max,, is the maximum cell capacity),
--{{formula fontSize="SMALL"}}
--| I_{stable2}-I_{stable1} | > 0.2 × Qmax
--{{/formula}}
++where U,,2,, is the voltage on the cell at the moment when the stabilized current I,,stable2,, is flowing through it; U,,1,, – the voltage on the cell at the moment when the stabilized current I,,stable1,, flowing through it.
--where Q,,max,, — the maximum cell capacity,U,,2,, — voltage on the cell at the moment when the stabilized current I,,stable2,, is flowing through it; U,,1,, — the voltage on the cell at the moment when the stabilized current I,,stable1,, flowing through it.
--
  The stabilized current I,,stable,, = I, if during the stabilization time the instantaneous current I is in the range from 0.95 × I to 1.05 × I.
  To change parameters of the algorithm for calculating the cell resistance, select the "Control → Resistance estimation" section:
@@ -140,9 +140,9 @@
  * Minimum SOC – minimum cell SOC value for resistance calculation;
  * Maximum SOC – maximum cell SOC value for resistance calculation.
--The calculated resistance is accepted by the system as valid (and therefore updated) if its value is in the range from Resistance / 2 to “Maximum resistance factor” × Resistance, where "Resistance" is the nominal resistance of the cell (see [[Common settings>>doc:||anchor="HCommonsettings"]]). If the calculated resistance value is greater than the value (Maximum resistance factor × Resistance), the updated resistance value will be equal to the value (Maximum resistance factor × Resistance).
++The calculated resistance is accepted by the system as valid (and therefore updated) if its value is in the range from Resistance/2 to “Maximum resistance factor” × Resistance, where "Resistance" is the nominal resistance of the cell (see section 2.3.1). If the calculated resistance value is greater than the value (Maximum resistance factor × Resistance), the updated resistance value will be equal to the value (Maximum resistance factor × Resistance).
--=== Low SOC (signal) ===
++=== 3.3.5 Low SOC (signal) ===
  To change the parameters of the generation a signal about low battery level, select the "Control → Low SOC (signal)" section:
@@ -167,7 +167,7 @@
  The "Low SOC signal" is indicative and can be output to a discrete output or a power switch.
--=== High charging current (signal) ===
++=== 3.3.6 High charging current (signal) ===
  To change the parameters of the generation high-current signal, select the "Control → High charging current (signal)" section:
@@ -192,7 +192,7 @@
  The "High charging current" signal is indicative and can be output to a discrete output or a power switch.
--=== Charge map ===
++=== 3.3.7 Charge map ===
  The BMS Main 3 device calculates the maximum allowable charge current values in respect to SOC, battery temperature, contactor temperature and cell voltage.
@@ -220,7 +220,7 @@
  Charging current limit = Maximum charging current × Kcs × Kcc × Kcv × Kct
--=== Discharge map ===
++=== 3.3.8 Discharge map ===
  The BMS Main 3 device calculates the maximum allowable discharge current values in respect to SOC, battery temperature, contactor temperature and cell voltage.
@@ -248,7 +248,7 @@
  Discharging current limit = Maximum discharging current × Kds × Kdc × Kdv × Kdt
--=== Charge map (PEAK & CONTINUOUS) ===
++=== 3.3.9 Charge map (PEAK & CONTINUOUS) ===
  The BMS Main 3 has an alternative algorithm for the maximum allowed charging current based on peak and continuous battery operating modes.
@@ -275,8 +275,9 @@
  I,,continuous,, = Maximum CONTINUOUS charge current × K,,cc,,
--=== Discharge map (PEAK & CONTINUOUS) ===
++=== 3.3.10 Discharge map (PEAK & CONTINUOUS) ===
++
  The BMS Main 3 has an alternative algorithm for the maximum allowed discharging current based on peak and continuous battery operating modes.
  To configure parameters for determining the discharge current limit, select the "Control → Discharge map (PEAK & CONTINUOUS)" section:
@@ -302,75 +302,8 @@
  I,,continuous,, = Maximum CONTINUOUS discharge current × K,,dc,,
--=== Main contactor ===
++=== 3.3.11 Charge ===
--The BMS Main 3 device controls the main contactor. The main contactor is usually placed in the common (minus) battery line for opening the charge and discharge circuits in case of sealing of the charging or discharging contactors.
--
--The Main contactor algorithm supports the following modes:
--
--* Always on;
--* Automatic;
--* On demand.
--
--In “Always on” mode main contactor closes if all the following is true:
--
--* Charging contactor is open;
--* Discharging contactor is open;
--* There are no errors from the list below:
--** Overcurrent;
--** Undervoltage;
--** Overvoltage;
--** High temperature (CH);
--** High temperature (DCH);
--** Unallowable charging;
--** Critical error.
--
--In “Always on” mode main contactor opens if all the following is true:
--
--* Charging contactor is open;
--* Discharging contactor is open;
--* There is an error from the list below:
--** Overcurrent;
--** Undervoltage;
--** Overvoltage;
--** High temperature (CH);
--** High temperature (DCH);
--** Unallowable charging;
--** Critical error.
--
--In “Automatic” mode, the main contactor closes by internal charging and discharging algorithms at the same time with Precharging, Charging and Discharging contactors.
--
--In “On demand” mode, the main contactor closes by external the “Close Main contactor” request.
--
--To change the parameters of the main contactor, select the "Control → Main contactor" section:
--
--[[image:1733322872744-536.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
--
--In this section:
--
--* Enable – a flag to enable the main contactor control;
--* Algorithm – main contactor control algorithm:
--** Always on – contactor is always closed;
--** Automatic – contactor closes by internal charge and discharge algorithms;
--** On demand – contactor is closed by an external request;
--* Time to keep the contactor closed before closing the others – a time for other contactors to be open after the main contactor is closed;
--* Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, s;
--* Keep the contactor open until the device is restarted – a flag for keeping the main contactor open until the system is reset.
--
--=== Charging status ===
--
--TBA
--
--=== Discharging status ===
--
--TBA
--
--=== Precharge ===
--
--TBA
--
--=== Charge ===
--
  There are two contactors that serve charging the battery: a charging contactor and an allow charging contactor. With the help of the allow charging contactor, the BMS commands the charger to start or stop charging.
  The device supports three charge control algorithms:
@@ -444,7 +444,7 @@
  Note – The allow charging contactor closes under two independent conditions: 1) the voltage on the cells reaches the “Voltage to reset the “Ready to charge"” level and 2) the "Delay before recharging" time has passed since the opening of the allow charging contactor.
--=== Discharge ===
++=== 3.3.12 Discharge ===
  The device controls the discharging contactor to connect battery to the load.
@@ -518,7 +518,7 @@
  * Voltage to clear the “Ready to discharge” – a threshold voltage level on the cell, V; if the voltage of any cell is below this level, the “Ready to discharge” signal is cleared;
  * Voltage to reset the “Ready to discharge” – a tolerant voltage level on the cell, V; if all cells voltages are above the tolerant level, the “Ready to discharge” signal is set;
--=== Charge/Discharge ===
++=== 3.3.13 Charge/Discharge ===
  The BMS Main 3 device can control the charging/discharging contactor, which combines algorithms of charging and discharging contactor. It behaves as a charging contactor when “Charge request” or “Charger connected” is set, otherwise – as a discharging contactor.
@@ -530,7 +530,7 @@
  * Enable – a flag to enable the charge/discharge controller.
--=== Discharge (AUX) ===
++=== 3.3.14 Discharge (AUX) ===
  The BMS Main 3 device can control the power supply of external equipment using the auxiliary (AUX) discharging contactor. An example of external equipment can be an inverter that converts DC to AC to power a service laptop and other devices.
@@ -557,8 +557,63 @@
  * Maximum voltage – maximum battery voltage, V;
  * Switch off the discharging (AUX) contactor on errors – the auxiliary (AUX) discharging contactor opens if the following errors occur: Undervoltage, Overcurrent, High temperature (DCH), Short circuit, Critical error.
--=== Cell balancing ===
++=== 3.3.15 Main contactor ===
++The BMS Main 3 device controls the main contactor. The main contactor is usually placed in the common (minus) battery line for opening the charge and discharge circuits in case of sealing of the charging or discharging contactors.
++
++The Main contactor algorithm supports the following modes:
++
++* Always on;
++* Automatic;
++* On demand.
++
++In “Always on” mode main contactor closes if all the following is true:
++
++* Charging contactor is open;
++* Discharging contactor is open;
++* There are no errors from the list below:
++** Overcurrent;
++** Undervoltage;
++** Overvoltage;
++** High temperature (CH);
++** High temperature (DCH);
++** Unallowable charging;
++** Critical error.
++
++In “Always on” mode main contactor opens if all the following is true:
++
++* Charging contactor is open;
++* Discharging contactor is open;
++* There is an error from the list below:
++** Overcurrent;
++** Undervoltage;
++** Overvoltage;
++** High temperature (CH);
++** High temperature (DCH);
++** Unallowable charging;
++** Critical error.
++
++In “Automatic” mode, the main contactor closes by internal charging and discharging algorithms at the same time with Precharging, Charging and Discharging contactors.
++
++In “On demand” mode, the main contactor closes by external the “Close Main contactor” request.
++
++To change the parameters of the main contactor, select the "Control → Main contactor" section:
++
++[[image:1733322872744-536.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
++
++In this section:
++
++* Enable – a flag to enable the main contactor control;
++* Algorithm – main contactor control algorithm:
++** Always on – contactor is always closed;
++** Automatic – contactor closes by internal charge and discharge algorithms;
++** On demand – contactor is closed by an external request;
++* Time to keep the contactor closed before closing the others – a time for other contactors to be open after the main contactor is closed;
++* Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, s;
++* Keep the contactor open until the device is restarted – a flag for keeping the main contactor open until the system is reset.
++
++=== 3.3.16 Cell balancing ===
++
  Balancing makes the voltage of all cells equal to the minimum cell voltage.
  The following balancing rules are supported:
@@ -593,7 +593,7 @@
  ** Balance on charge or relaxed - balancing is performed while and after the charging and in the relaxed state (in “Charge ON”, “Charge OFF”, “Relaxed (after charging)” and “Relaxed (after discharging)” states);
  ** Balance always – balancing is always performed regardless the battery state;
--[[image:1733322883462-975.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="74" width="600"]]
++[[image:1733322883462-975.png]]
  * Minimum cell voltage to start balancing, V;
  * Voltage deviation to start balancing;
@@ -600,7 +600,7 @@
  * Voltage deviation to stop balancing;
  * Command to discharge all cells – a flag to force the balancing of all cells.
--=== Series balancing ===
++=== 3.3.17 Series balancing ===
  The BMS Main 3 device supports work with two independent (galvanically unrelated) cell series. To monitor the status of two series, two current sensors are used. A series of cells must be equivalent: they must have the same number of cells and the same capacity.
@@ -627,7 +627,7 @@
  * Period – a period to reset of charge counters for each series (to avoid accumulation of error), second;
  * Do not sum series voltages – a flag to disable the summing of series voltages.3
--=== Power down ===
++=== 3.3.18 Power down ===
  The BMS Main 3 device can shut down itself if the battery voltage is low or the battery is idle for a long time.
@@ -650,7 +650,7 @@
  * Power down if KEYRUN and CHARGE_ON are cleared – a flag to power down the device if KEYRUN and CHARGE_ON signals are cleared;
  * Delay before setting the internal power down signal – a delay before turning off the device power when removing KEYRUN and CHARGE_ON or receiving the “Power down request” command, ms.
--=== Heater ===
++=== 3.3.19 Heater ===
  To change the parameters of the heater control algorithm, select the "Control → Heater" section:
@@ -677,7 +677,7 @@
  If there is the "Heater" signal, the heater contactor closes and/or a signal is output to the corresponding digital output.
--=== Cooler ===
++=== 3.3.20 Cooler ===
  To change the parameters of the cooler control algorithm, select the "Control → Cooler" section:
@@ -704,13 +704,16 @@
  If there is the "Cooler" signal, the cooler contactor closes and/or a signal is output to the corresponding digital output.
--=== High voltage ===
++1.
++11.
++111. High voltage
++
  The BMS Main 3 device has an ability to measure high voltages before and after contactors.
  To change the parameters of high voltage fault, select the "Control → High voltage" section:
--[[image:1733322914683-203.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="87" width="800"]]
++[[image:1733322914683-203.png]]
  In this section:
@@ -722,8 +722,11 @@
  **If there is the “High voltage fault”, the “Critical error” is generated and all contactors open.**
--=== Cell analysis ===
++1.
++11.
++111. Cell analysis
++
  The battery discharge characteristic – the dependence Uocv = Uocv(DOD) – is used to determine the tabular dependence Uocv = Uocv(SOC, t°C), which is necessary for calculating the battery charge level.
  The BMS Main 3 device can automatically determine the battery discharge characteristic.
@@ -735,7 +735,7 @@
  To configure parameters for determining the discharge characteristic of the battery, select the "Control → Cell analysis" section:
--[[image:1733322914685-558.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="107" width="800"]]
++[[image:1733322914685-558.png]]
  In this section:

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