Changes for page 3.5 Battery control

Last modified by Admin on 2025/03/10 12:50

From 11.2 to 11.3 From 19.1 to 20.1

From version 11.3

edited by Admin
on 2025/01/11 19:01

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To version 19.1

edited by Admin
on 2025/02/19 09:57

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@@ -62,8 +62,8 @@
  * Use specific delays before stopping charging (on errors) – a flag to enable manual settings of time delays T,,off,, for specific errors;
  * Switch off the charging relay on errors without delay – a flag to protectively open the charging relay without delay. In the opposite case, when an error is detected, the charging relay opens always with the delay “Delay before stopping charging”;
  * Control the precharging relay – a flag that allows control of the precharging relay;
--* Voltage to clear the “Ready to charge” (hence, the “Allow charging”) signal – a threshold voltage level on the cell, V; if the voltage of any cell is above this level, the “Ready to charge” signal is cleared;
--* Voltage to reset the “Ready to charge” (hence, the “Allow charging”) signal – a tolerant voltage level on the cell, V; if all cell voltages are below the tolerant level, the “Ready to charge” signal is set;
++* Voltage to clear the “Ready to charge” (hence, the “Allow charging”) signal – 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” signal is cleared;
++* Voltage to reset the “Ready to charge” (hence, the “Allow charging”) signal – 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” signal is set;
  * Delay before recharging – a time after which the previously opened the allow charging relay closes again, minute; to disable the operation by timeout set "Delay before recharging" to 0.
  (% class="box infomessage" %)
@@ -133,8 +133,8 @@
  * Switch off the discharging relay on errors without delay – a flag to protectively open the discharging relay without delay. In the opposite case, when an error is detected, the discharging relay opens always with the delay “Delay before stopping discharging”.
  * Precharge time – a duration of closing the precharge relay before closing the discharging relay, millisecond;
  * Precharge current threshold to start discharging – a minimum current value to finish precharging and start discharge, A;
--* Voltage to clear the “Ready to discharge” signal – 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” signal – a tolerant voltage level on the cell, V; if all cells voltages are above the tolerant level, the “Ready to discharge” signal is set.
++* Voltage to clear the “Ready to discharge” signal – 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” signal – 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.
  === Discharging (AUX) control ===
@@ -155,12 +155,15 @@
  In this section:
  * Enable – a flag to activate the auxiliary discharge control;
--* Switch off the discharging (AUX) relay at low SOC:
++* Switch off the discharging (AUX) relay at when the battery SOC is low:
  ** Minimum SOC – a minimum SOC value, when reached, the auxiliary (AUX) discharging relay opens, %;
  ** Tolerant SOC – a permissive SOC value, upon reaching which the auxiliary (AUX) discharging relay re-closes, %;
++* Switch off the discharging (AUX) relay when the cell voltage is low:
++** Minimum cell voltage – a minimum cell voltage, when reached, the auxiliary (AUX) discharging relay opens, %;
++** Tolerant cell voltage – a permissive cell voltage, upon reaching which the auxiliary (AUX) discharging relay re-closes, %;
  * Switch off the discharging (AUX) relay if the battery voltage is out of the range:
--** Minimum voltage – minimum battery voltage, V;
--** Maximum voltage – maximum battery voltage, V;
++** Minimum battery voltage – minimum battery voltage, V;
++** Maximum battery voltage – maximum battery voltage, V;
  * Switch off the discharging (AUX) relay on errors – the auxiliary (AUX) discharging relay opens if the following errors occur: Undervoltage, Overcurrent, High temperature (discharging), Short circuit, Critical error.
  === Charging/Discharging control ===
@@ -179,31 +179,44 @@
  The BMS Main 2.x has a relay to control the main contactor. The main contactor is usually placed in the common (minus) battery line for opening the charge and discharge circuits in a case of sealing of the charging or discharging contactor.
--The main contactor closes if there are no errors from the list below:
++The Main contactor algorithm supports the following modes:
--* Overcurrent;
--* Undervoltage;
--* Overvoltage;
--* High temperature (charging);
--* High temperature (discharging);
--* Unallowable charging;
--* Critical error.
++* Always on;
++* Automatic;
++* On demand.
--The main contactor opens if the charging and discharging relays are opened and any of the following conditions is met:
++In “Always on” mode main contactor closes if all the following is true:
--* charging or discharging current is detected during a set time;
--* voltage of any cell is lower than the minimum cell voltage configured in the section "Protections → Undervoltage protection" during a set time;
--* voltage of any cell is greater than the maximum cell voltage configured in the section "Protections → Overvoltage protection" during a set time;
--* temperature of any cell is greater than the maximum cell temperature configured in the section "Protections → High temperature protection" during a set time;
--* Critical error stays on during a set time.
++* Other contactors are open;
++* There are no errors from the list below:
++** Overcurrent;
++** Undervoltage;
++** Overvoltage;
++** High temperature (charging);
++** High temperature (discharging);
++** Unallowable charging;
++** Critical error.
++In “Always on” mode main contactor opens if all the following is true:
++
++* Other contactors are open;
++* There is an error from the the list above.
++
++In “Automatic” mode, the main contactor closes and opens 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.
++
  To change the parameters of the main contactor, select the menu "Cells → Main contactor":
--[[image:1732209137414-912.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="132" width="352"]]
++[[image:1739958553206-813.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="179" width="410"]]
  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;
  * Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, second;
  * Keep the contactor open until the device is reset – a flag for keeping the main contactor opened until the system be reset.

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