Changes for page 3.3 Control

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

From 76.11 to 76.10 From 76.16 to 76.15

From version 76.15

edited by Admin
on 2026/03/31 13:30

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To version 76.11

edited by Admin
on 2026/03/31 13:04

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@@ -402,34 +402,34 @@
  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 can detect errors while pre-charging the load capacity by monitoring **the current and voltage difference** before and after contactors.
++In simple mode precharge contactor closes
--BMS Main 2R can detect errors while pre-charging the load capacity **only by monitoring the current**.
++BMS Main 3 can detect errors while pre-charging the load capacity by monitoring the current and voltage difference before and after contactors.
--In **simple **mode precharge contactor closes a "Precharge time" before the closing of Charge or Discharge contactors and opens after the same amount of time after closing them.
++BMS Main 2R can detect errors while pre-charging the load capacity __only__ by monitoring the current.
--In **enhanced **mode precharge contactor will wait until the current of voltage difference requirements are met and close the Charge or Discharge contactors only after that. If waiting time is greater than "Precharge time" value, an error will be generated. Precharge contactor will open after "Precharge time" after closing the Charge of Discharge contactors.
++Also BMS can measure the power dissipated on precharge resistor and generate an error if it greater than configured limit.
--Also BMS Main 3 / BMS Main 2R can measure the power dissipated on precharge resistor and generate an error if it is greater than configured limit.
++TBA
  To change the parameters of precharge contactor, select the "Control → Precharge" section:
  [[image:1750328428183-819.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="178" width="800"]]
--* **Precharge current threshold to finish precharging **– a minimum current value at which precharging process assumed to be finished, A;
--* **Check voltages before and after contactors to finish precharging **– a flag to check the voltages before and after contactors to ensure that precharge process has finished and it is allowed to close the discharging contactor;
--* **Minimum voltage difference to finish precharging** – minimal voltage difference before and after contactors at which precharge process is meant to be finished, V;
--* **Keep the precharging relay closed until precharge is finished** – a flag to ignore the Precharge time and wait precharging to finish before open precharge relay;
--* **Number of precharging attempts** – maximum number of precharging attempts before setting the "Precharge error";
--* **Delay before current measurement** – a delay before first current measurement after closing precharge, millisecond;
--* **Precharge time **– a duration of closing the precharge contactor before closing the discharging contactor, millisecond;
--* **Relaxation between attempts **– a duration between precharge attempts, millisecond;
--* **Check the power dissipated in the preacharge resistor** - a flag to enable the calculation of power dissipated in precharge resistor;
--* **Precharge resistor resistance**, Ohm;
--* **Maximum allowable power dissipated in the resistor**, W;
--* **Delay before setting the "Precharge error" when checking power**, millisecond;
--* **Delay before clearing the "Precharge error"**, second;
--* **Lock the "Precharge error"** – a flag to block the error until the device is restarted.
++* Precharge current threshold to finish precharging – a minimum current value at which precharging process assumed to be finished, A;
++* Check voltages before and after contactors to finish precharging – a flag to check the voltages before and after contactors to ensure that precharge process has finished and it is allowed to close the discharging contactor;
++* Minimum voltage difference to finish precharging – minimal voltage difference before and after contactors at which precharge process is meant to be finished, V;
++* Keep the precharging relay closed until precharge is finished – a flag to ignore the Precharge time and wait precharging to finish before open precharge relay;
++* Number of precharging attempts – maximum number of precharging attempts before setting the "Precharge error";
++* Delay before current measurement – a delay before first current measurement after closing precharge, millisecond;
++* Precharge time – a duration of closing the precharge contactor before closing the discharging contactor, millisecond;
++* Relaxation between attempts – a duration between precharge attempts, millisecond;
++* Check the power dissipated in the preacharge resistor - a flag to enable the calculation of power dissipated in precharge resistor;
++* Precharge resistor resistance, Ohm;
++* Maximum allowable power dissipated in the resistor, W;
++* Delay before setting the "Precharge error" when checking power, millisecond;
++* Delay before clearing the "Precharge error", second;
++* Lock the "Precharge error" – a flag to block the error until the device is restarted.
  “Precharge error” generation conditions if any of the following is true:
@@ -444,10 +444,14 @@
  === Charge ===
--There are two signals that serve charging the battery: "Charging" and "Allow charging". With the help of the "Allow charging" signal, the BMS commands the charger to start or stop charging.
++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:
++* Always on – charging is always allowed;
++* On charger connected – charging is allowed when there is a signal “Charger connected”;
++* On charge request – charging is allowed when there is a signal “Charge request”.
++
  If the "**Always on**" algorithm is selected, the charging contactor and the allow charging contactor are always closed. If at least one of the errors from the "Errors 1, 2 ..." bitfields appears or one of the signals:
  * Service reset;
@@ -481,26 +481,32 @@
  In this section:
--* **Enable **– a flag to activate the charge control;
--* **Algorithm**:
--** **Always on** – charging is always allowed;
--** **On charger connected** – charging is allowed when there is a signal “Charger connected”;
--** **On charge request** – charging is allowed when there is a signal “Charge request”;
--* **Allow charging only when the "Ready to charge" signal is set** – charging contactor will open if "Ready to charge" signal is cleared;
--* **Delay before starting charging** – a time delay T,,on,, before closing the charging contactor and the allow charging contactor, millisecond;
--* **Delay before stopping charging** – a time delay T,,off,, before opening the charging contactor, millisecond;
--* **Control the precharging contactor** – a flag that allows control of the precharging contactor while closing the charge contactor (see [[Precharge>>path:#HPrecharge]]);
--* **Errors 1, 2 to open the charging contactor** – bitfields to choose the errors which will open the charging contactor;
--* **Use custom delays before stopping charging (on errors)** – a flag to enable manual settings of time delays T,,off,, for specific errors;
--* **Custom delay: <error>** – delay for specific error, millisecond;
--* **Switch off the charging contactor on errors without delay** – a flag to protectively open the charging contactor without a delay. In the opposite case, when an error is detected, the charging contactor opens always with the delay “Delay before stopping charging”;
++* Enable – a flag to activate the charge control;
++* Algorithm:
++** Always on – charging is always allowed;
++** On charger connected – charging is allowed when there is a signal “Charger connected”;
++** On charge request – charging is allowed when there is a signal “Charge request”;
++* Allow charging only when the "Ready to charge" signal is set – charging contactor will open if "Ready to charge" signal is cleared;
++* Delay before starting charging – a time delay T,,on,, before closing the charging contactor and the allow charging contactor, millisecond;
++* Delay before stopping charging – a time delay T,,off,, before opening the charging contactor, millisecond;
++* Control the precharging contactor – a flag that allows control of the precharging contactor while closing the charge contactor (see [[Precharge>>path:#HPrecharge]]);
++* Errors 1, 2 to open the charging contactor – bitfields to choose the errors which will open the charging contactor;
++* Use custom delays before stopping charging (on errors) – a flag to enable manual settings of time delays T,,off,, for specific errors;
++* Custom delay: <error> – delay for specific error, millisecond;
++* Switch off the charging contactor on errors without delay – a flag to protectively open the charging contactor without a delay. In the opposite case, when an error is detected, the charging contactor opens always with the delay “Delay before stopping charging”;
  === Discharge ===
  The device controls the discharging contactor to connect battery to the load.
--The device supports three algorithms to control battery discharging:When the algorithm "**Always on**" is selected, the discharging contactor is always closed. If at least one of the errors from the "Errors 1, 2 ..." bitfields appears or one of the signals:
++The device supports three algorithms to control battery discharging:
++* Always on – load is always connected;
++* On charger disconnected – load is connected when there is no signal “Charger connected”;
++* On discharge request – load is connected when there is signal “Discharge request”.
++
++When the algorithm "**Always on**" is selected, the discharging contactor is always closed. If at least one of the errors from the "Errors 1, 2 ..." bitfields appears or one of the signals:
++
  * Service reset
  * Power down request
  * Inhibit discharging

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