Changes for page 3.3 Control

Last modified by Admin on 2025/04/09 12:15

From 19.1 to 18.1 From 21.1 to 20.1

From version 20.1

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To version 19.1

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@@ -229,70 +229,31 @@
  To configure parameters for determining the discharge current limit, select the "Control → Discharge map" section:
--[[image:1740397304972-174.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="182" width="800"]]
++[[image:1733746766511-477.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="149" width="800"]]
  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 SOC and temperature;
++* Maximum discharge current – a maximum allowable value of the discharge current (under normal conditions):
++* Option 1: Limit discharging current by the battery SOC and temperature – a flag to enable correction of maximum allowable discharging current Kds depending on 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 minimum cell voltage;
--* 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:
++[[image:1733746766512-300.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="195" width="800"]]
--**Discharge current limit = Maximum discharge current × Kds × Kdc × Kdv × Kdt**
++* 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;
--=== Main contactor ===
++[[image:1733746766513-161.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="183" width="800"]]
--The BMS Mini 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 a case of sealing of the charging or discharging contactors.
++* Option 3: Limit discharge current by the cell voltage - a flag to enable correction of maximum allowable discharging current Kdv depending on minimum cell voltage;
++* Option 3: Cell voltage x Factor – the dependence of the correction factor on minimum cell voltage.
--The Main contactor algorithm supports the following modes:
++[[image:1733746766514-686.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="215" width="800"]]
--* Always on;
--* Automatic.
++Value of the discharge current limit at given SOC, temperature, contactors temperature and minimum cell voltage is calculated as follows:
--In “Always on” mode main contactor closes if all the following is true:
++Discharging current limit = Maximum discharging current × Kds × Kdc × Kdv
--* Other contactors are open;
--* There are no errors from the "Errors 1, 2 ..." bitfileds.
--
--In “Always on” mode main contactor opens if all the following is true:
--
--* Other contactors are open;
--* 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 “On demand” mode, the main contactor closes by external the “Close Main contactor” request.
--
--(% class="box infomessage" %)
--(((
--**Note: **when errors occur in the system, the **Main **contactor opens either immediately or with the delay T,,off,, (depends on the settings described below).
--)))
--
--To change the parameters of the main contactor, select the "Control → Main contactor" section:
--
--[[image:1740397558976-651.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="144" 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;
--* Errors 1, 2 to open the main contactor – bitfields to choose the errors which will open the main contactor.
--
  === 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.
@@ -477,8 +477,38 @@
  * 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 Mini 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 a case of sealing of the charging or discharging contactors.
++
++The main contactor closes if there are no errors from the list below:
++
++* Overcurrent;
++* Undervoltage;
++* Overvoltage;
++* High temperature (CH);
++* High temperature (DCH);
++* Unallowable charging;
++* Critical error.
++
++The main contactor opens if the charging and discharging contactors are opened and any of the following conditions is met:
++
++* 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" during a set time;
++* voltage of any cell is greater than the maximum cell voltage configured in the section "Protections → Overvoltage" during a set time;
++* temperature of any cell is greater than the maximum cell temperature configured in the section "Protections → High temperature" during a set time;
++* Critical error stays on during a set time.
++
++To change the parameters of the main contactor, select the "Control → Main contactor" section:
++
++[[image:1733746797002-498.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="93" width="800"]]
++
++In this section:
++
++* Enable – a flag to enable the main contactor control;
++* 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 restarted – a flag for keeping the main contactor opened until the system be reset.
++
  === Cell balancing ===
  Balancing makes the voltage of all cells be equal to the minimum cell voltage.

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