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Changes for page 3.3 Control

Last modified by Admin on 2026/04/30 15:56
From version 87.2
edited by Admin
on 2026/04/02 10:15
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To version 78.4
edited by Admin
on 2026/03/31 14:28
Change comment: There is no comment for this version

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... ... @@ -15,7 +15,7 @@
15 15  * **Cell capacity** – nominal capacity of cells, Ah;
16 16  * **Cell resistance** – nominal (maximum) internal resistance of the cells, Ohm;
17 17  * **Connection of cells:**
18 -** **Serial **– all cells are connected in series in a single string;
18 +** **Serial **– all cells are connected in series in a single string.
19 19  ** **Parallel-Serial **– cells are grouped in parallel and serial items;
20 20  * **Parallel-Serial: Number of Logic devices in a chain**;
21 21  * **Parallel-Serial: Number of parallel chains in a block**;
... ... @@ -29,7 +29,7 @@
29 29  ** **Summation of cell voltages** – the overall voltage is calculated as on sum of all cells in the battery;
30 30  ** **Using voltage before contactors** – the overall voltage is estimated as voltage before contactors measured by BMS.
31 31  
32 -The **"Parallel-Serial"** connection works as follows: a bunch of serial connected Logics are grouped into chains. A bunch of parallel connected chains are grouped to blocks. A bunch of serial connected blocks are grouped into string. By configuring the corresponding settings it is possible to create a complex string configuration. Current through each chain will be calculated as overall string current divided by number of chains in a block.
32 +The **"Parallel-Serial"** connection works as follows: a bunch of serial connected Logics are grouped into chains. A bunch of parallel connected chains are grouped to blocks. A bunch of serial connected blocks are grouped into string. By configuring the corresponding settings it is possible to create a complex string configuration. Current through each chain will be estimated as a fraction of overall current accordingly to the number of chains in a block.
33 33  
34 34  The values **“Capacity”** and **“Resistance”** are used to calculate the SOC of cells and the battery.
35 35  
... ... @@ -39,7 +39,7 @@
39 39  
40 40  === SOC estimation ===
41 41  
42 -The BMS Main 3 / BMS Main 2R device calculates the state of charge (SOC) of each cell by using following algorithms:
42 +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:
43 43  
44 44  The **“Voltage”** SOC calculation algorithm calculates cells SOC based on the tabular dependence Uocv = Uocv(SOC, t °C).
45 45  
... ... @@ -94,7 +94,7 @@
94 94  
95 95  === SOH estimation ===
96 96  
97 -The BMS Main 3 / BMS Main 2R device calculates the state of health of the battery (SOH) using two algorithms:
97 +The BMS Main 3 device calculates the state of health of the battery (SOH) using two algorithms:
98 98  
99 99  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.
100 100  
... ... @@ -402,9 +402,9 @@
402 402  
403 403  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.
404 404  
405 -BMS Main 3 can check the preacharge process by monitoring **the current and voltage difference** before and after contactors.
405 +BMS Main 3 can detect errors while pre-charging the load capacity by monitoring **the current and voltage difference** before and after contactors.
406 406  
407 -BMS Main 2R can check the preacharge process **only by monitoring the current**.
407 +BMS Main 2R can detect errors while pre-charging the load capacity **only by monitoring the current**.
408 408  
409 409  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.
410 410  
... ... @@ -431,7 +431,7 @@
431 431  * **Delay before clearing the "Precharge error"**, second;
432 432  * **Lock the "Precharge error"** – a flag to block the error until the device is restarted.
433 433  
434 -“Precharge error” generates if any of the following is true:
434 +“Precharge error” generation conditions if any of the following is true:
435 435  
436 436  * the precharge current does not decrease during the "Precharge time" after "Number of precharging attempts";
437 437  * voltages before and after contactors are not equal during the "Precharge time" after "Number of precharging attempts";
... ... @@ -448,17 +448,17 @@
448 448  
449 449  BMS Main 3 / BMS Main 2R supports three charge control algorithms:
450 450  
451 -If the "**Always on**" algorithm is selected, the "Сharging signals" and the "Allow charging" signals are always closed. If at least one of the errors from the "Errors 1, 2 ..." bitfields appears or one of the signals:
451 +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:
452 452  
453 453  * Service reset;
454 454  * Power down request;
455 455  * Inhibit charging,
456 456  
457 -both signals are cleared.
457 +both contactors are open (no current flows).
458 458  
459 459  When the algorithm "**On charger connected**" is selected, the control is performed as follows:
460 460  
461 -* If there is a signal “Charger connected” and there are no errors (see the "Errors 1, 2 ..." bitfields), then through the delay time T,,on,, the "Charging" signal and the "Allow charging" contactor close;
461 +* If there is a signal “Charger connected” and there are no errors (see the "Errors 1, 2 ..." bitfields), then through the delay time T,,on,, the charging contactor and the allow charging contactor close;
462 462  * If the signal “Charger connected” disappears or errors occur (see the "Errors 1, 2 ..." bitfields), the allow charging contactor opens and after the delay time T,,off,, the charging contactor opens.
463 463  
464 464  When the "**On charge request**" algorithm selected, the control is performed as follows:
... ... @@ -626,9 +626,9 @@
626 626  
627 627  The following **balancing rules** are supported:
628 628  
629 -* **Balance on charge** – perform balancing when the battery is charging (current I > 0) and time after until the battery is relaxed;
630 -* **Balance on charge or relaxed** – perform balancing when the battery is charging (current I > 0) or when the battery is in a state of relaxation ​​​​​;
631 -* **Balance always** regardless of battery state.
629 +* when the battery is charging (current I > 0) and time after until the battery is relaxed;
630 +* when the battery is charging (current I > 0) or when the battery is in a state of relaxation;
631 +* always (regardless of battery state).
632 632  
633 633  A balancing resistor is connected to the cell if the following conditions are simultaneously met:
634 634  
... ... @@ -645,9 +645,9 @@
645 645  If the “High logic temperature” occurs, then the balancing of the cells connected to the overheated BMS Logic device will not be performed.
646 646  )))
647 647  
648 -The BMS Main 3 / BMS Main 2R can enable the cell balancing by the external **“Balancing request”** signal. Balancing process will be started to cells which the voltage is higher than the balancing start voltage and the difference between the cell voltage and the minimum voltage among all the cells is greater than the balancing stop threshold.
648 +The BMS Main 3 / BMS Main 2R can enable the cell balancing by the external “Balancing request” signal. Balancing process will be started to cells which the voltage is higher than the balancing start voltage and the difference between the cell voltage and the minimum voltage among all the cells is greater than the balancing stop threshold.
649 649  
650 -BMS Main 3 / BMS Main 2R can **force balancing **of the cell, if its voltage is higher than estimated value.
650 +BMS Main 3 / BMS Main 2R can force a cell balancing, if its voltage is higher than estimated value.
651 651  
652 652  To change the cell balancing parameters, select the "Control → Cell balancing" section:
653 653  
... ... @@ -707,7 +707,7 @@
707 707  * the battery voltage is below the minimum level;
708 708  * the “Charger connected” signal is cleared for 60 seconds.
709 709  
710 -The BMS Main 3 device also shuts down the battery if it **stays for a long time **in the “Charging OFF”, “Discharging OFF”, “Relaxed (after charging)” or “Relaxed (after discharging)” state.
710 +The BMS Main 3 device also shuts down the battery if it stays in the “Charging OFF”, “Discharging OFF”, “Relaxed (after charging)” or “Relaxed (after discharging)” for the configured time.
711 711  
712 712  To change the parameters of the power down control, select the "Control → Power down" section:
713 713  
... ... @@ -787,7 +787,7 @@
787 787  
788 788  === High voltage ===
789 789  
790 -(% class="box warningmessage" %)
790 +(% class="box infomessage" %)
791 791  (((
792 792  This section is not available on BMS Main 2R.
793 793  )))
... ... @@ -834,8 +834,10 @@
834 834  * **Logic index, Cell index** – a position of the analyzed cell;
835 835  * **Analyse the most discharged cell** – a flag to analyse of the least charged cell (in this case, the values “Logic index” and “Cell index” are ignored).
836 836  
837 -Discharge step should be set equal to С/21, where C is the cell capacity.
837 +Discharge step should be set equal to С/21,
838 838  
839 +where C is the cell capacity.
840 +
839 839  The discharge characteristic will be constructed for the given cell (its position is determined by the fields “Logic index” and “Cell index”).
840 840  
841 841  The algorithm for determining the discharge characteristic of the battery will be started if the “Enable” flag is set. From this moment, the control of the discharge contactor is performed by this algorithm.