Changes for page 3.3 Control

Last modified by Admin on 2026/04/30 15:56

From 76.3 to 76.4 From 76.10 to 76.11

From version 76.4

edited by Admin
on 2026/03/31 12:36

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To version 76.10

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@@ -35,28 +35,12 @@
  The values of **“Relax time”** are used to determine the state of the battery. If the battery is in a state of relaxation, the system recalculates the voltage on the cells to the state of charge of the battery.
--The **“Reset ”** command is used for starting-up and adjustment of the battery.
++The **“Reset SOC”, "Reset resistance" **and **"Reset capacity"** command is used for starting-up and adjustment of the battery.
  === SOC estimation ===
--The BMS Main 3 device calculates the state of charge of the battery (SOC) using two algorithms:
++The BMS Main 3 / BMS Main 2R device calculates the state of charge (SOC) of each cell, and then the overall battery SOC, by using following algorithms:
--* by open circuit voltage;
--* by voltage and current.
--
--It is recommended to use the algorithm of calculation of SOC by voltage and current.
--
--To change the estimation algorithm for calculating the battery SOC, select the "Control → SOC estimation → Algorithm" section:
--
--
--[[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;
--* Current and voltage (simplified) – recommended for LFP cells;
--* Current and voltage (enhanced) – recommended for NMC cells.
--
  The **“Voltage”** SOC calculation algorithm calculates cells SOC based on the tabular dependence Uocv = Uocv(SOC, t °C).
  The **“Current and voltage (simplified)”** SOC calculation algorithm works as follows:
@@ -66,32 +66,34 @@
  The **“Current and voltage (enhanced)” **SOC calculation algorithm differs from the simplified algorithm by online correction of the effective capacity. When using this algorithm, it is necessary to fine tune the tabular dependence Uocv = Uocv (SOC, t °C).
--To change the algorithm for calculating the Final SOC, select the "Control → SOC estimation → Final SOC" section:
++To change the algorithm for calculating the SOC, select the "Control → SOC estimation" section:
  [[image:1733322611551-852.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="148" width="800"]]
--The following calculation methods are supported (“Final SOC”):
++In this section:
--* 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 has 100% SOC, b) 0% if any cell has 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.
++* **Algorithm:**
++** **Voltage **– by open circuit voltage;
++** **Current and voltage (simplified)** – recommended for LFP cells;
++** **Current and voltage (enhanced)** – recommended for NMC cells:
++* **Final SOC** – method of calculating overall SOC of battery:
++** **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 (recommended). Final SOC will be a) 100% if __any cell__ has 100% SOC, b) 0% if __any cell__ has 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.
++* **Scale the final SOC** – a flag to scale the battery SOC by the following values;
++* **SOC corresponding to 0%** – the battery SOC that sets to be 0%;
++* **SOC corresponding to 100%** – the battery SOC that sets to be 100%.
++* **Uocv (open-circuit voltage) table** – the dependence of the cell open circuit voltage Uocv on SOC and the cell temperature (selected for specific batteries);
++* **Linear zone** - linear zone of the Uocv = Uocv(SOC, t°C) dependency, inside which the cell voltage changes insignificantly:
++** **Linear zone: point 1** – starting point of the Uocv linear zone;
++** **Linear zone: point 2** – ending point of the Uocv linear zone;
++* **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.
--Other parameters:
--
--* Scale the final SOC – a flag to scale the battery SOC by the following values;
--* SOC corresponding to 0% – the battery SOC that sets to be 0%;
--* SOC corresponding to 100% – the battery SOC that sets to be 100%.
--* Uocv (open-circuit voltage) table – the dependence of the cell open circuit voltage Uocv on SOC and the cell temperature (selected for specific batteries);
--* Linear zone - linear zone of the Uocv = Uocv(SOC, t°C) dependency, inside which the cell voltage changes insignificantly:
--** Linear zone: point 1 – starting point of the Uocv linear zone;
--** Linear zone: point 2 – ending point of the Uocv linear zone;
--* 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 ===
--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 / BMS Main 2R 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"]]).
  To configure parameters for periodically correcting the battery state of charge, select the "Control → SOC correction" section:
@@ -99,33 +99,30 @@
  In this section:
--* Enable – a flag to enable the SOC correction;
--* Shutdown period – a time the battery is off, day. If the BMS detects on its startup that it was off during the “Shutdown period” time, the BMS recalculates the battery state of charge based on the tabular dependency Uocv = Uocv (SOC, t);
--* Correction period – a period of correcting the battery SOC, day. If the BMS detects that the last correction was more than the “Correction period” ago, the BMS recalculates the battery state of charge based on the tabular dependency Uocv = Uocv (SOC, t) and tunes it gradually during the “SOC change time”.
--* SOC change time – a duration of the linear changing the battery SOC to the value calculated by the correction algorithm, minute;
--* 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.
++* **Enable **– a flag to enable the SOC correction;
++* **Shutdown period** – a time the battery is off, day. If the BMS detects on its startup that it was off during the “Shutdown period” time, the BMS recalculates the battery state of charge based on the tabular dependency Uocv = Uocv (SOC, t);
++* **Correction period** – a period of correcting the battery SOC, day. If the BMS detects that the last correction was more than the “Correction period” ago, the BMS recalculates the battery state of charge based on the tabular dependency Uocv = Uocv (SOC, t) and tunes it gradually during the “SOC change time”.
++* **SOC change time** – a duration of the linear changing the battery SOC to the value calculated by the correction algorithm, minute;
++* **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.
  === SOH estimation ===
  The BMS Main 3 device calculates the state of health of the battery (SOH) using two algorithms:
--* By effective capacity;
--* By total charge-.
++In **"By effective capacity" **mode SOH is calculated as a ratio of effective capacity to nominal capacity. Effective capacity is estimated to DOD value when battery SOC reaches 0%, so SOH is recalculated each full battery discharge.
--In "By effective capacity" mode SOH is calculated as a ratio of effective capacity to nominal capacity. Effective capacity is estimated to DOD value when battery SOC reaches 0%, so SOH is recalculated each full battery discharge.
++In** "By total charge–"** mode SOH is calculated as a linear function of "Total charge-" counter. While "Total charge-" constantly increases during battery operation, SOH will be linearly decrease at the same time. This mode requires a confirmed data about cell health depending of amount of discharge rate to configure the linear function.
--In "By total charge-" mode SOH is calculated as a linear function of "Total charge-" counter. While "Total charge-" constantly increases during battery operation, SOH will be linearly decrease at the same time. This mode requires a confirmed data about cell health depending of amount of discharge rate to configure the linear function.
--
  To configure parameters for battery state of health calculation, select the "Control → SOH correction" section:
  [[image:1765447975228-766.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="96" width="800"]]In this section:
--* Algorithm:
--** By effective capacity;
--** By total charge-;
--* Total charge: Charge- –  total amount of charge- for expected SOH;
--* Total charge: SOH –  expected SOH value at the total amount of charge-.
++* **Algorithm:**
++** **By effective capacity;**
++** **By total charge–;**
++* **Total charge: Charge–** –  total amount of charge– for expected SOH;
++* **Total charge: SOH** – expected SOH value at the total amount of charge–.
  === Resistance estimation ===
@@ -159,16 +159,18 @@
  In this section:
--* Current stabilization time, millisecond;
--* Maximum calculation period – maximum time between resistance measurements. If more time has elapsed since the last determination of the stabilized current I,,stable,, than is determined in this field, the resistance calculation is not performed, second;
--* Maximum resistance factor – the coefficient of calculation of the maximum acceptable resistance of the cell;
--* Minimum SOC – minimum cell SOC value for resistance calculation;
--* Maximum SOC – maximum cell SOC value for resistance calculation.
++* **Current stabilization time**, millisecond;
++* **Maximum calculation period** – maximum time between resistance measurements. If more time has elapsed since the last determination of the stabilized current I,,stable,, than is determined in this field, the resistance calculation is not performed, second;
++* **Maximum resistance factor** – the coefficient of calculation of the maximum acceptable resistance of the cell;
++* **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).
  === Low SOC (signal) ===
++The "Low SOC" is indicative signal that can be assigned to a discrete output or a power switch.
++
  To change the parameters of the generation a signal about low battery level, select the "Control → Low SOC (signal)" section:
  [[image:1733322624660-513.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="116" width="800"]]
@@ -175,12 +175,12 @@
  In this section:
--* Enable – a flag to enable signal generation;
--* Minimum SOC, %;
--* Tolerant SOC, %;
--* Delay before setting the signal, second;
--* Delay before clearing the signal, second;
--* Lock – lock the signal until the device is reset.
++* **Enable **– a flag to enable signal generation;
++* **Minimum SOC**, %;
++* **Tolerant SOC**, %;
++* **Delay before setting the signal**, second;
++* **Delay before clearing the signal**, second;
++* **Lock** – lock the signal until the device is reset.
  Signal generation conditions:
@@ -190,13 +190,10 @@
  * the battery SOC is greater than the “Tolerant SOC” during the “Delay before clearing the signal” time.
--(% class="box infomessage" %)
--(((
--The "Low SOC signal" is indicative and can be output to a discrete output or a power switch.
--)))
--
  === High charging current (signal) ===
++The "High charging current" is indicative signal that can be output to a discrete output or a power switch.
++
  To change the parameters of the generation high-current signal, select the "Control → High charging current (signal)" section:
  [[image:1733322624661-915.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="107" width="800"]]
@@ -203,12 +203,12 @@
  In this section:
--* Enable – a flag to enable signal generation;
--* Maximum charging current, А;
--* Tolerant charging current, А;
--* Delay before setting the signal, second;
--* Delay before clearing the signal, second;
--* Lock – lock the signal until the device is reset.
++* **Enable **– a flag to enable signal generation;
++* **Maximum charging current**, А;
++* **Tolerant charging current**, А;
++* **Delay before setting the signal**, second;
++* **Delay before clearing the signal**, second;
++* **Lock **– lock the signal until the device is reset.
  Signal generation conditions:
@@ -218,14 +218,9 @@
  * the measured current is less than the “Tolerant charging current” value during the “Delay before clearing the signal” time.
--(% class="box infomessage" %)
--(((
--The "High charging current" signal is indicative and can be output to a discrete output or a power switch.
--)))
--
  === 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.
++The BMS Main 3 / BMS Main 2R device calculates the maximum allowable charge current values in respect to SOC, battery temperature, contactor temperature and cell voltage.
  Calculated current values are sent to a charger or an intellectual load over the CAN bus. External devices based on received data provide correct battery operation.
@@ -235,17 +235,17 @@
  In this section:
--* Enable – a flag to start calculation of the charge current limit;
--* Maximum charge current – a maximum allowable value of the charge current (under normal conditions), A;
--* Rate of change – a rate of change the current limit to a new value (0 is for immediate change), A/s;
--* Option 1: Limit charge current by the battery SOC and temperature – a flag to enable correction of maximum allowable charging current** Kcs** depending on __maximum cell SOC__ and battery temperature;
--* Option 1: SOC x Temperature x Factor – the dependence of the correction factor on SOC and battery temperature;
--* Option 2: Limit charge current by the contactor temperature – a flag to enable correction of maximum allowable charging current **Kcc** depending on contactor temperature;
--* Option 2: Contactor temperature x Factor – the dependence of the correction factor on SOC and contactor temperature;
--* Option 3: Limit charge current by the maximum cell voltage - a flag to enable correction of maximum allowable charging current **Kcv** depending on __the maximum cell U,,ocv,, voltage__ (corrected due to current and cell resistance)
--* Option 3: Cell voltage x Factor – the dependence of the correction factor on maximum cell voltage;
--* Option 4: Limit charge current by the cell temperature - a flag to enable correction of maximum allowable charging current **Kct** depending on maximum cell temperature;
--* Option 4: Cell temperature x Factor – the dependence of the correction factor on maximum cell temperature.
++* **Enable **– a flag to start calculation of the charge current limit;
++* **Maximum charge current** – a maximum allowable value of the charge current (under normal conditions), A;
++* **Rate of change** – a rate of change the current limit to a new value (0 is for immediate change), A/s;
++* **Option 1: Limit charge current by the battery SOC and temperature** – a flag to enable correction of maximum allowable charging current** Kcs** depending on __maximum cell SOC__ and battery temperature;
++* **Option 1: SOC x Temperature x Factor** – the dependence of the correction factor on SOC and battery temperature;
++* **Option 2: Limit charge current by the contactor temperature** – a flag to enable correction of maximum allowable charging current **Kcc** depending on contactor temperature;
++* **Option 2: Contactor temperature x Factor** – the dependence of the correction factor on SOC and contactor temperature;
++* **Option 3: Limit charge current by the maximum cell voltage** – a flag to enable correction of maximum allowable charging current **Kcv** depending on __the maximum cell U,,ocv,, voltage__ (corrected due to current and cell resistance)
++* **Option 3: Cell voltage x Factor** – the dependence of the correction factor on maximum cell voltage;
++* **Option 4: Limit charge current by the cell temperature** – a flag to enable correction of maximum allowable charging current **Kct** depending on maximum cell temperature;
++* **Option 4: Cell temperature x Factor** – the dependence of the correction factor on maximum cell temperature.
  Value of the charge current limit at given SOC, temperature, contactors temperature, maximum cell voltage and maximum cell temperature is calculated as follows:
@@ -253,7 +253,7 @@
  === 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.
++The BMS Main 3 / BMS Main 2R device calculates the maximum allowable discharge current values in respect to SOC, battery temperature, contactor temperature and cell voltage.
  Calculated current values are sent to a charger or an intellectual load over the CAN bus.
@@ -263,17 +263,17 @@
  In this section:
--* Enable – a flag to start calculation of the discharge current limit;
--* Maximum discharge current – a maximum allowable value of the discharge current (under normal conditions), A;
--* Rate of change – a rate of change the current limit to a new value (0 is for immediate change), A/s;
--* Option 1: Limit discharging current by the battery SOC and temperature – a flag to enable correction of maximum allowable discharging current **Kds **depending on __minimum cell SOC__ and temperature;
--* Option 1: SOC x Temperature x Factor – the dependence of the correction factor on SOC and battery temperature;
--* Option 2: Limit discharge current by the contactor temperature – a flag to enable correction of maximum allowable discharging current **Kdc** depending on contactor temperature;
--* Option 2: Contactor temperature x Factor – the dependence of the correction factor on SOC and contactor temperature;
--* Option 3: Limit discharge current by the cell voltage - a flag to enable correction of maximum allowable discharging current **Kdv** depending on __the minimum cell U,,ocv,, voltage__ (corrected due to current and cell resistance)
--* Option 3: Cell voltage x Factor – the dependence of the correction factor on minimum cell voltage;
--* Option 4: Limit discharge current by the cell temperature - a flag to enable correction of maximum allowable discharging current **Kdt** depending on maximum cell temperature;
--* Option 4: Cell voltage x Factor – the dependence of the correction factor on minimum cell temperature.
++* **Enable **– a flag to start calculation of the discharge current limit;
++* **Maximum discharge current** – a maximum allowable value of the discharge current (under normal conditions), A;
++* **Rate of change** – a rate of change the current limit to a new value (0 is for immediate change), A/s;
++* **Option 1: Limit discharging current by the battery SOC and temperature** – a flag to enable correction of maximum allowable discharging current **Kds **depending on __minimum cell SOC__ and temperature;
++* **Option 1: SOC x Temperature x Factor** – the dependence of the correction factor on SOC and battery temperature;
++* **Option 2: Limit discharge current by the contactor temperature** – a flag to enable correction of maximum allowable discharging current **Kdc** depending on contactor temperature;
++* **Option 2: Contactor temperature x Factor** – the dependence of the correction factor on SOC and contactor temperature;
++* **Option 3: Limit discharge current by the cell voltage** – a flag to enable correction of maximum allowable discharging current **Kdv** depending on __the minimum cell U,,ocv,, voltage__ (corrected due to current and cell resistance)
++* **Option 3: Cell voltage x Factor** – the dependence of the correction factor on minimum cell voltage;
++* **Option 4: Limit discharge current by the cell temperature** – a flag to enable correction of maximum allowable discharging current **Kdt** depending on maximum cell temperature;
++* **Option 4: Cell voltage x Factor** – the dependence of the correction factor on minimum cell temperature.
  Value of the discharge current limit at given SOC, temperature, contactors temperature, minimum cell voltage and maximum cell temperature is calculated as follows:
@@ -281,7 +281,7 @@
  === 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.
++The BMS Main 3 / BMS Main 2R has an alternative algorithm for the maximum allowed charging current based on peak and continuous battery operating modes.
  To configure parameters for determining the charge current limit, select the "Control → Charge map (PEAK & CONTINUOUS)" section:
@@ -289,26 +289,26 @@
  In this section:
--* Enable – a flag to start calculation of the charge current limit;
--* Maximum PEAK charge current – a maximum peak charge current (under normal conditions), A;
--* Maximum CONTINUOUS charge current – a maximum continuous charge current (under normal conditions), A;
--* PEAK: SOC x Temperature x Factor – the dependence of the correction factor for peak current K,,cp,, on SOC and battery temperature;
--* CONTINUOUS: SOC x Temperature x Factor – the dependence of the correction factor for continuous current K,,cc,, on SOC and battery temperature;
--* PEAK time – a time for peak current to be allowed, s;
--* Sliding time – a time of linear change of the maximum charging current from peak to continuous and from continuous to peak value, ms;
--* Waiting time – a time for peak current to be prohibited, s.
++* **Enable **– a flag to start calculation of the charge current limit;
++* **Maximum PEAK charge current** – a maximum peak charge current (under normal conditions), A;
++* **Maximum CONTINUOUS charge current** – a maximum continuous charge current (under normal conditions), A;
++* **PEAK: SOC x Temperature x Factor** – the dependence of the correction factor for peak current K,,cp,, on SOC and battery temperature;
++* **CONTINUOUS: SOC x Temperature x Factor** – the dependence of the correction factor for continuous current K,,cc,, on SOC and battery temperature;
++* **PEAK time** – a time for peak current to be allowed, s;
++* **Sliding time** – a time of linear change of the maximum charging current from peak to continuous and from continuous to peak value, ms;
++* **Waiting time** – a time for peak current to be prohibited, s.
  The maximum charging current value equals to the peak or continuous current according to the following diagram:
  [[image:1733322717451-608.png||data-xwiki-image-style-alignment="center"]]
--I,,peak,, = Maximum PEAK charge current × K,,cp,,
++**I,,peak,, = Maximum PEAK charge current × K,,cp,,**
--I,,continuous,, = Maximum CONTINUOUS charge current × K,,cc,,
++**I,,continuous,, = Maximum CONTINUOUS charge current × K,,cc,,**
  === 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.
++The BMS Main 3 / BMS Main 2R 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:
@@ -316,45 +316,42 @@
  In this section:
--* Enable – a flag to start calculation of the discharge current limit;
--* Maximum PEAK discharge current – a maximum peak discharge current (under normal conditions), A;
--* Maximum CONTINUOUS discharge current – a maximum continuous discharge current (under normal conditions), A;
--* PEAK: SOC x Temperature x Factor – the dependence of the correction factor for peak current K,,dp,, on SOC and battery temperature;
--* CONTINUOUS: SOC x Temperature x Factor – the dependence of the correction factor for continuous current K,,dc,, on SOC and battery temperature;
--* PEAK time – a time for peak current to be allowed, s;
--* Sliding time – a time of linear change of the maximum charging current from peak to continuous and from continuous to peak value, ms;
--* Waiting time – a time for peak current to be prohibited, s.
++* **Enable **– a flag to start calculation of the discharge current limit;
++* **Maximum PEAK discharge current** – a maximum peak discharge current (under normal conditions), A;
++* **Maximum CONTINUOUS discharge current** – a maximum continuous discharge current (under normal conditions), A;
++* **PEAK: SOC x Temperature x Factor** – the dependence of the correction factor for peak current K,,dp,, on SOC and battery temperature;
++* **CONTINUOUS: SOC x Temperature x Factor** – the dependence of the correction factor for continuous current K,,dc,, on SOC and battery temperature;
++* **PEAK time** – a time for peak current to be allowed, s;
++* **Sliding time** – a time of linear change of the maximum charging current from peak to continuous and from continuous to peak value, ms;
++* **Waiting time** – a time for peak current to be prohibited, s.
  The maximum discharging current value equals to the peak or continuous current according to following diagram:
  [[image:1733322753429-968.png||data-xwiki-image-style-alignment="center"]]
--I,,peak,, = Maximum PEAK discharge current × K,,dp,,
++**I,,peak,, = Maximum PEAK discharge current × K,,dp,,**
--I,,continuous,, = Maximum CONTINUOUS discharge current × K,,dc,,
++**I,,continuous,, = Maximum CONTINUOUS discharge current × K,,dc,,**
  === 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 BMS Main 3 / BMS Main 2R 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.
++In **“Always on”** mode main contactor closes if all the following is true:
--In “Always on” mode main contactor closes if all the following is true:
--
  * Other contactors are open;
--* There are no errors from the "Errors 1, 2 ..." bitfileds.
++* There are __no errors__ from the "Errors 1, 2 ..." bitfileds.
--In “Always on” mode main contactor opens if all the following is true:
++and opens if all the following is true:
  * Other contactors are open;
--* There is an error from the the "Errors 1, 2 ..." bitfileds.
++* There is __an error__ from the the "Errors 1, 2 ..." bitfileds.
--In “Automatic” mode, the main contactor closes by internal algorithms at the same time with other contactors.
++In **“Automatic”** mode, the main contactor closes by internal algorithms at the same time with other contactors.
--In “On demand” mode, the main contactor closes by external the “Close Main contactor” request.
++In **“On demand”** mode, the main contactor closes by external the “Close Main contactor” request.
  (% class="box infomessage" %)
  (((
@@ -367,15 +367,15 @@
  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;
--* Errors 1, 2 to open the main contactor – bitfields to choose the errors which will open the main contactor.
++* **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;
++* **Errors 1, 2 to open the main contactor** – bitfields to choose the errors which will open the main contactor.
  === Charging status ===
@@ -385,17 +385,17 @@
  In this section:
--* Current to set the "Charging current present" – a current level to generate the "Charging current present" signal, A;
--* Current to clear the "Charging current present" – a current level to clear the "Charging current present" signal, A;
--* Voltage to clear the “Ready to charge” – a threshold U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if the voltage of any cell is above this level, the “Ready to charge” (hence, the “Allow charging”) signal is cleared;
--* Voltage to reset the “Ready to charge” – a tolerant U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if all cell voltages are below the tolerant level, the “Ready to charge” (hence, the “Allow charging”) signal is set;
--* Use actual voltage to generate the "Ready to charge" signal – a flag to disable voltage correction for "Ready to charge" signal;
--* Treat negative currents as zero currents for generating the "Ready to charge" signal – a flag to disable voltage correction for "Ready to charge" signal at discharging current;
--* Delay before recharging – a time after which the previously opened the allow charging contactor closes again, minute; to disable the operation by timeout set "Delay before recharging" to 0;
--* Check the 'Charge current limit' value to generate the 'Ready to charge' – a flag to enable check of "Charging current limit" to generate the "Ready to charge" signal;
--* Charge current limit to clear the 'Ready to charge' – a threshold charging current limit value, A; if the limit is //above //this level, the “Ready to charge” signal is cleared;
--* Charge current limit to set the 'Ready to charge' – a tolerant charging current limit value, A; if the limit is //below //this level, the “Ready to charge” signal is set;
--* Errors 1, 2 to clear the "Ready to charge" – bitfields to choose the errors which will clear the "Ready to charge" signal.
++* **Current to set the "Charging current present"** – a current level to generate the "Charging current present" signal, A;
++* **Current to clear the "Charging current present"** – a current level to clear the "Charging current present" signal, A;
++* **Voltage to clear the “Ready to charge”** – a threshold U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if the voltage of any cell is above this level, the “Ready to charge” (hence, the “Allow charging”) signal is cleared;
++* **Voltage to reset the “Ready to charge”** – a tolerant U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if all cell voltages are below the tolerant level, the “Ready to charge” (hence, the “Allow charging”) signal is set;
++* **Use actual voltage to generate the "Ready to charge" signal** – a flag to disable voltage correction for "Ready to charge" signal;
++* **Treat negative currents as zero currents for generating the "Ready to charge" signal** – a flag to disable voltage correction for "Ready to charge" signal at discharging current;
++* **Delay before recharging** – a time after which the previously opened the allow charging contactor closes again, minute; to disable the operation by timeout set "Delay before recharging" to 0;
++* **Check the 'Charge current limit' value to generate the 'Ready to charge'** – a flag to enable check of "Charging current limit" to generate the "Ready to charge" signal;
++* **Charge current limit to clear the 'Ready to charge'** – a threshold charging current limit value, A; if the limit is //above //this level, the “Ready to charge” signal is cleared;
++* **Charge current limit to set the 'Ready to charge'** – a tolerant charging current limit value, A; if the limit is //below //this level, the “Ready to charge” signal is set;
++* **Errors 1, 2 to clear the "Ready to charge"** – bitfields to choose the errors which will clear the "Ready to charge" signal.
  (% class="box infomessage" %)
  (((
@@ -412,24 +412,28 @@
  In this section:
--* Current to set the "Discharging current present" – a current level to generate the "Discharging current present" signal, А;
--* Current to clear the "Discharging current present" – a current level to clear the "Discharging current present" signal, А;
--* Voltage to clear the “Ready to discharge” – a threshold U,,ocv,, (corrected due to current and cell resistance) 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 U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if all cells voltages are above the tolerant level, the “Ready to discharge” signal is set;
--* Use actual voltage to generate the "Ready to discharge" signal – a flag to disable voltage correction for "Ready to discharge" signal;
--* Treat positive currents as zero currents for generating the "Ready to discharge" signal – a flag to disable voltage correction for "Ready to discharge" signal at charging current;
--* Check the 'Discharge current limit' value to generate the 'Ready to discharge' – a flag to enable check of "Discharging current limit" to generate the "Ready to discharge" signal;
--* Discharge current limit to clear the 'Ready to discharge' – a threshold discharging current limit value, A; if the limit is //above //this level, the “Ready to discharge” signal is cleared;
--* Discharge current limit to set the 'Ready to discharge' – a tolerant discharging current limit value, A; if the limit is //below //this level, the “Ready to discharge” signal is set;
--* Clear the 'Ready to discharge' signal if the 'Low SOC' signal is set;
--* Errors 1, 2 to clear the "Ready to discharge" – bitfields to choose the errors which will clear the "Ready to discharge" signal.
++* **Current to set the "Discharging current present"** – a current level to generate the "Discharging current present" signal, А;
++* **Current to clear the "Discharging current present"** – a current level to clear the "Discharging current present" signal, А;
++* **Voltage to clear the “Ready to discharge”** – a threshold U,,ocv,, (corrected due to current and cell resistance) 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 U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if all cells voltages are above the tolerant level, the “Ready to discharge” signal is set;
++* **Use actual voltage to generate the "Ready to discharge" signal** – a flag to disable voltage correction for "Ready to discharge" signal;
++* **Treat positive currents as zero currents for generating the "Ready to discharge" signal** – a flag to disable voltage correction for "Ready to discharge" signal at charging current;
++* **Check the 'Discharge current limit' value to generate the 'Ready to discharge'** – a flag to enable check of "Discharging current limit" to generate the "Ready to discharge" signal;
++* **Discharge current limit to clear the 'Ready to discharge'** – a threshold discharging current limit value, A; if the limit is //above //this level, the “Ready to discharge” signal is cleared;
++* **Discharge current limit to set the 'Ready to discharge'** – a tolerant discharging current limit value, A; if the limit is //below //this level, the “Ready to discharge” signal is set;
++* **Clear the 'Ready to discharge' signal if the 'Low SOC' signal is set**;
++* **Errors 1, 2 to clear the "Ready to discharge"** – bitfields to choose the errors which will clear the "Ready to discharge" signal.
  === Precharge ===
--The BMS Main 3 device can control the precharge contactor. The precharge contactor is used to charge the intermediate capacity with low current and usually placed with the limiting resistor in parallel to charging or discharging contactor.
++The BMS Main 3 / BMS Main 2R device can control the precharge contactor. The precharge contactor is used to charge the intermediate capacity with low current and usually placed with the limiting resistor in parallel to charging or discharging contactor.
--BMS Main 3 device detects errors while pre-charging the load capacity by monitoring the current and voltage difference before and after contactors. Also BMS can measure the power dissipated on precharge resistor and generate an error if it greater than configured limit.
++BMS Main 3 device detects errors while pre-charging the load capacity by monitoring the current and voltage difference before and after contactors.
++BMS Main 2R device detects errors while pre-charging the load capacity only by monitoring the current.
++
++Also BMS can measure the power dissipated on precharge resistor and generate an error if it greater than configured limit.
++
  TBA
  To change the parameters of precharge contactor, select the "Control → Precharge" section:

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