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Changes for page 3.4 Protections

Last modified by Admin on 2026/04/01 08:42
From version 37.1
edited by Admin
on 2025/08/22 14:12
Change comment: There is no comment for this version
To version 51.1
edited by Admin
on 2026/03/31 14:44
Change comment: There is no comment for this version

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4 4  (% data-numbered-headings-start="4" style="--numbered-headings-start: 3;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
5 5  == Protections ==
6 6  
7 -The BMS Main 3 device continuously monitors the state of the cells, the external environment and, when detecting abnormalities, protects the battery and system components from damage.
7 +The BMS Main 3 / BMS Main 2R device continuously monitors the state of the cells, the external environment and, when detecting abnormalities, protects the battery and system components from damage.
8 8  
9 9  (% class="box errormessage" %)
10 10  (((
... ... @@ -14,7 +14,7 @@
14 14  
15 15  === Overcurrent ===
16 16  
17 -The BMS Main 3 device performs the overcurrent protection depending on current sensor values.
17 +The BMS Main 3 / BMS Main 2R device performs the overcurrent protection depending on current sensor values.
18 18  
19 19  To change the overcurrent protection of the battery, select the "Protections → Overcurrent" section:
20 20  
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45 45  
46 46  === Charge current limit ===
47 47  
48 -The BMS Main 3 device can check if the charging current exceeds the estimated limit based on the [[Charge map>>doc:Battery management systems.BMS Main 3.3\. Configuration.3\.3 Control.WebHome||anchor="HChargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
48 +The BMS Main 3 / BMS Main 2R device can check if the charging current exceeds the estimated limit based on the [[Charge map>>doc:Battery management systems.BMS Main 3.3\. Configuration.3\.3 Control.WebHome||anchor="HChargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
49 49  
50 50  Current difference is separated to two regions by the threshold value. Maximum current in Region 1 is calculated by the absolute difference, in Region 2 – by the relative difference.
51 51  
... ... @@ -63,7 +63,7 @@
63 63  
64 64  === Discharge current limit ===
65 65  
66 -The BMS Main 3 device can check if the discharging current exceeds the estimated limit based on the [[Discharge map>>doc:Battery management systems.BMS Main 3.3\. Configuration.3\.3 Control.WebHome||anchor="HDischargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
66 +The BMS Main 3 / BMS Main 2R device can check if the discharging current exceeds the estimated limit based on the [[Discharge map>>doc:Battery management systems.BMS Main 3.3\. Configuration.3\.3 Control.WebHome||anchor="HDischargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
67 67  
68 68  Current difference is separated to two regions by the threshold value. Maximum current in Region 1 is calculated by the absolute difference, in Region 2 – by the relative difference.
69 69  
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83 83  
84 84  === Undervoltage ===
85 85  
86 -The BMS Main 3 device implements battery protection from too low voltage on the cells.
86 +The BMS Main 3 / BMS Main 2R device implements battery protection from too low voltage on the cells.
87 87  
88 88  To change the battery protection parameters from low voltage on the cells, select the "Protections → Undervoltage" section:
89 89  
... ... @@ -111,7 +111,7 @@
111 111  
112 112  === Overvoltage ===
113 113  
114 -The BMS Main 3 device implements battery protection from too high voltage on the cells.
114 +The BMS Main 3 / BMS Main 2R device implements battery protection from too high voltage on the cells.
115 115  
116 116  To change the battery protection parameters from high voltage on the cells, select the "Protections → Overvoltage" section:
117 117  
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137 137  
138 138  * the maximum voltage among all cells of the battery is less than the “Tolerant cell voltage” value for the “Delay before clearing the error” time.
139 139  
140 +=== Cell imbalance ===
141 +
142 +The BMS Main 3 / BMS Main 2R device implements battery protection from too much cell imbalance. If balancing algorithm is not enough to compensate battery imbalance, then imbalance protection generates an error when imbalance is above estimated threshold.
143 +
144 +To change the battery protection parameters from cell imbalance, select the "Protections → Cell imbalance" section:
145 +
146 +[[image:1760437465709-702.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="133" width="800"]]In this section:
147 +
148 +* Enable – a flag to enable the protection;
149 +* Maximum cell imbalance, V;
150 +* Tolerant cell imbalance, V;
151 +* Delay before setting the error, millisecond;
152 +* Delay before clearing the error, second;
153 +* Lock – a flag to block the error until the device is restarted.
154 +
155 +As a result of the operation of the battery protection from cell imbalance, the "Cell imbalance” error is generated.
156 +
157 +Error generation conditions:
158 +
159 +* the voltage difference between the most charged cell and the least charged cell is more than the “Maximum cell imbalance” value for the “Delay before setting the error” time.
160 +
161 +Conditions for removing the error:
162 +
163 +* the voltage difference between the most charged cell and the least charged cell is less than the “Tolerant cell imbalance” value for the “Delay before clearing the error” time.
164 +
140 140  === Low temperature ===
141 141  
142 -The BMS Main 3 device implements battery protection from too low temperature.
167 +The BMS Main 3 / BMS Main 2R device implements battery protection from too low temperature.
143 143  
144 144  To change the battery protection parameters from low temperature, select the "Protections → Low temperature" section:
145 145  
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168 168  
169 169  === High temperature ===
170 170  
171 -The BMS Main 3 device implements battery protection from too high temperature.
196 +The BMS Main 3 / BMS Main 2R device implements battery protection from too high temperature.
172 172  
173 173  To change the battery protection parameters from high temperature, select the "Protections → High temperature" section:
174 174  
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225 225  
226 226  === High humidity ===
227 227  
228 -The BMS Main 3 can detect that the battery is operating in high humidity conditions.
253 +The BMS Main 3 / BMS Main 2R can detect that the battery is operating in high humidity conditions.
229 229  
230 230  To change the detection parameters, select the "Protections → High humidity" section:
231 231  
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257 257  
258 258  === Water ===
259 259  
260 -The BMS Main 3 can protect the battery from working in very high humidity conditions.
285 +The BMS Main 3 / BMS Main 2R can protect the battery from working in very high humidity conditions.
261 261  
262 262  To change the protection parameters, select the "Protections → Water" section:
263 263  
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408 408  
409 409  To change the protection parameters from the mismatch of the number of BMS Logic devices to the set value, select the "Protections → Logic count” section:
410 410  
411 -[[image:1733328415732-163.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="110" width="800"]]
436 +[[image:1762425434368-516.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="125" width="800"]]
412 412  
413 413  In this section:
414 414  
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415 415  * Enable – a flag to enable the protection;
416 416  * Logic count – a number of BMS Logic devices connected to the BMS Main;
417 417  * Scan fast – a flag to scan BMS Logic devices fast (devices with addresses from 1 to “Logic count” are scanned; this mode reduces BMS system startup time);
443 +* Delay before setting the error – a delay before setting the error //during initialization//, millisecond;
444 +* Delay before clearing the error– a delay before clearing the error //during initialization//, second;
418 418  * Lock – lock the error until the device is reset.
419 419  
420 420  As a result of the operation of the protection from the mismatch of the number of BMS Logic devices, the "Logic count error" is generated.
... ... @@ -421,11 +421,13 @@
421 421  
422 422  Error generation conditions:
423 423  
424 -* the number of BMS Logic devices connected to the BMS Main is **not equal** to the “Logic count” value.
451 +* during the initialization BMS Main 3 / BMS Main 2R have not found required number of BMS Logic devices during the "Delay before setting the error" time;
452 +* after the initialization the number of BMS Logic devices connected to the BMS Main is **not equal** to the “Logic count” value.
425 425  
426 426  Conditions for removing the error:
427 427  
428 -* the number of BMS Logic devices connected to the BMS Main is **equal** to the “Logic count” value.
456 +* during the initialization BMS Main 3 / BMS Main 2R have found required number of BMS Logic devices and the "Delay before setting the error" time has passed;
457 +* after the initialization the number of BMS Logic devices connected to the BMS Main is **equal** to the “Logic count” value.
429 429  
430 430  (% class="box warningmessage" %)
431 431  (((
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434 434  
435 435  === Short circuit ===
436 436  
437 -The BMS Main 3 device implements the protection of power circuits (contactors, power wires) against overheating caused by the flow of high current for a long time.
466 +The BMS Main 3 / BMS Main 2R device implements the protection of power circuits (contactors, power wires) against overheating caused by the flow of high current for a long time.
438 438  
439 439  To change the protection parameters from short circuit, select the "Protections → Short circuit" section:
440 440  
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461 461  
462 462  === High contactor temperature ===
463 463  
464 -The BMS Main 3 device protects power contactors from overheating. To measure the temperature of the contactor, one of the thermistors connected to the X5 connector is used.
493 +The BMS Main 3 / BMS Main 2R device protects power contactors from overheating. To measure the temperature of the contactor, one of the thermistors connected to the X5 connector is used.
465 465  
466 466  To change the overheating protection parameters of power contactors, select the "Protections → High contactor temperature" section:
467 467  
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489 489  
490 490  === Current sensor ===
491 491  
492 -The BMS Main 3 device checks the current sensor connection circuits. The circuits are checked for breakage and short-circuit to the +5 V supply line.
521 +The BMS Main 3 / BMS Main 2R device checks the current sensor connection circuits. The circuits are checked for breakage and short-circuit to the +5 V supply line.
493 493  
494 494  To change the test parameters of the current sensor connection circuits, select the "Protections → Current sensor" section:
495 495  
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523 523  
524 524  === Power switch ===
525 525  
526 -BMS Main 3 device checks the status of power switches that are used to control the contactors. To change the parameters of the power switch protection, select the "Protections → Power switch" section:
555 +BMS Main 3 / BMS Main 2R device checks the status of power switches that are used to control the contactors. To change the parameters of the power switch protection, select the "Protections → Power switch" section:
527 527  
528 528  [[image:1733328461554-241.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="99" width="800"]]
529 529  
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541 541  
542 542  === Power fault ===
543 543  
544 -BMS Main 3 device checks the status of CAN2, CAN3, RS-485-2 and Current sensors power supply.
573 +BMS Main 3 / BMS Main 2R device checks the status of CAN2, CAN3, RS-485-2 and Current sensors power supply.
545 545  
546 546  (% class="box infomessage" %)
547 547  (((
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571 571  
572 572  === Charge contactor cycles ===
573 573  
574 -The BMS Main 3 device protects the charging contactor against frequent switching.
603 +The BMS Main 3 / BMS Main 2R device protects the charging contactor against frequent switching.
575 575  
576 576  To change the protection parameters against high frequency switching of the charging contactor, select the "Protections → Charge contactor cycles" section:
577 577  
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598 598  
599 599  === Discharge contactor cycles ===
600 600  
601 -The BMS Main 3 device protects the discharging contactor against frequent switching.
630 +The BMS Main 3 / BMS Main 2R device protects the discharging contactor against frequent switching.
602 602  
603 603  To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
604 604  
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625 625  
626 626  === Temperature sensors ===
627 627  
628 -The BMS Main 3 device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
657 +The BMS Main 3 / BMS Main 2R device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
629 629  
630 630  To change the protection parameters of the temperature sensors circuits, select the "Protections → Temperature sensors" section:
631 631  
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695 695  
696 696  === Stuck contactor ===
697 697  
698 -The BMS Main 3 device protects contactors against sticking.
727 +The BMS Main 3 / BMS Main 2R device protects contactors against sticking.
699 699  
700 700  To change the protection parameters against sticking, select the "Protections → Stuck contactor" section:
701 701  
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721 721  
722 722  === Contactor feedback ===
723 723  
724 -The BMS Main 3 device can receive feedback signals from contactors and detect discrepancy between the control value and the feedback signal. To enable specific contactor protection, the feedback signal must be connected to the corresponding contactor feedback pin on the X3 header.
753 +The BMS Main 3 / BMS Main 2R device can receive feedback signals from contactors and detect discrepancy between the control value and the feedback signal. To enable specific contactor protection, the feedback signal must be connected to the corresponding contactor feedback pin on the X3 header.
725 725  
726 726  To change the contactor feedback check parameters, select the "Protections → Contactor feedback" section:
727 727  
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745 745  
746 746  === Insulation ===
747 747  
748 -The BMS Main 3 device can detect a physical signal or CAN bus message from an external insulation monitoring device (such as Bender IR155, iso165C, BMD IMD) to monitor the insulation quality.
777 +The BMS Main 3 / BMS Main 2R device can detect a physical signal or CAN bus message from an external insulation monitoring device (such as Bender IR155, iso165C, BMD IMD) to monitor the insulation quality.
749 749  
750 750  To change the insulation monitoring parameters, select the "Protections → Insulation" section:
751 751  
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771 771  
772 772  === HVIL ===
773 773  
774 -The BMS Main 3 allows to control the high voltage interlock loop by applying current to a testing loop and monitoring the difference between the measured current and the required value.
803 +The BMS Main 3 / BMS Main 2R allows to control the high voltage interlock loop by applying current to a testing loop and monitoring the difference between the measured current and the required value.
775 775  
776 776  To change the HVIL measurement parameters, select the "Protections → HVIL" section:
777 777  
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797 797  
798 798  === Battery voltage ===
799 799  
800 -The BMS Main 3 allows to control the difference between sum of all cell voltages and voltage measured before the contactors.
829 +The BMS Main 3 / BMS Main 2R allows to control the difference between sum of all cell voltages and voltage measured before the contactors.
801 801  
802 -To change the HVIL measurement parameters, select the "Protections → Battery voltage" section:
831 +To change the voltage difference check parameters, select the "Protections → Battery voltage" section:
803 803  
804 804  [[image:1755871661259-633.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="100" width="800"]]
805 805  
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821 821  
822 822  * difference between sum of all cell voltages and voltage measured before the contactors is **less **than "Abnormal voltage difference" value during "Delay before clearing the error" time.
823 823  
853 +(% class="box warningmessage" %)
854 +(((
855 +If there is the “Battery voltage mismatch” error, the **“Critical error”** is generated.
856 +)))
857 +
824 824  === Critical error ===
825 825  
826 826  Some of the errors are system critical. A separate signal named "Critical error" indicates a BMS fault.
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827 827  
828 828  To change the critical error parameters, select the "Protections → Critical error" section:
829 829  
830 -[[image:1733328487100-898.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
864 +[[image:1762775547945-129.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="117" width="800"]]
831 831  
832 832  In this section:
833 833  
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834 834  * Enable – a flag to enable the protection;
835 835  * Delay before setting the error, millisecond;
836 836  * Delay before clearing the error, second;
871 +* Errors 1, 2 to to ignore when setting the critical error;
837 837  * Lock – a flag to block the error until the device is restarted.
838 838  
839 839  The "Critical error" signal is generated if at least one of the critical errors (see [[Errors>>doc:Battery management systems.Additional information.1\. Battery controllers\: signals and errors.WebHome||anchor="HErrors"]]) is generated during the “Delay before setting the error” time.
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