Changes for page 3.3 Control

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

From 6.1 to 6.2 From 11.2 to 11.3

From version 6.2

edited by Admin
on 2024/12/24 15:42

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To version 11.2

edited by Admin
on 2024/12/24 17:38

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@@ -18,7 +18,8 @@
  * 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:
--** Summa
++** 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.
  The values “Capacity”, “Resistance”, “Cycles” are used to calculate the SOC of cells and the battery.
@@ -43,8 +43,9 @@
  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;
@@ -68,7 +68,8 @@
  * 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 taken based on the minimum and maximum SOC of the cells (recommended method).
++* 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;
  Other parameters:
@@ -103,18 +103,26 @@
  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
--R = (U-U,,ocv,,) / I,,stable,,,
++{{formula fontSize="SMALL" imageType="PNG"}}
++R = \frac{U-U_{ocv}}{I_{stable}}
++{{/formula}}
--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.
++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.
  The second method is used for a stepwise change in the current through the cell, while the value of the cell resistance:
--R = (U,,2,,-U,,1,,) / (I,,stable2,,-I,,stable1,,) provided that | I,,stable2,,-I,,stable1,, | > 0.2 × Q,,max,,
++{{formula fontSize="SMALL"}}
++R = \frac{U_2-U_1}{I_{stable2}-I_{stable1}}
++{{/formula}}
--(Q,,max,, is the maximum cell capacity),
++provided that
--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.
++{{formula fontSize="SMALL"}}
++| I_{stable2}-I_{stable1} | > 0.2 × Qmax
++{{/formula}}
++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:
@@ -129,7 +129,7 @@
  * 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 [[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) ===
@@ -264,7 +264,6 @@
  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.
@@ -292,6 +292,73 @@
  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 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.
@@ -480,61 +480,6 @@
  * 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.
--=== 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.
--
  === Cell balancing ===
  Balancing makes the voltage of all cells equal to the minimum cell voltage.

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