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Changes for page 3.4 Protections

Last modified by Admin on 2025/11/10 11:45
From version 2.2
edited by Admin
on 2025/02/26 11:58
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To version 24.2
edited by Admin
on 2025/11/10 11:20
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... ... @@ -45,23 +45,44 @@
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>>url:https://docs.movicomelectric.com/bin/view/Battery%20management%20systems/BMS%20Main%203/3.%20Configuration/3.3%20Control/#HChargemap]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
48 +The BMS Mini device can check if the charging current exceeds the estimated limit based on the [[Charge map>>doc:Battery management systems.BMS Mini S.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  
52 52  To change the overcurrent protection of the battery, select the "Protections → Charge current limit" section:
53 53  
54 +[[image:1740571132019-848.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="143" width="800"]]
54 54  
55 55  In this section:
56 56  
57 57  * Enable – a flag to enable the protection;
58 58  * Threshold to switch from Region 1 to Region 2 – a current value at which current excess calculation will be switched from absolute to relative difference, A;
59 -* Region 1: Current difference – a value of maximum absolute current diffr, A;
60 +* Region 1: Current difference – a value of maximum absolute current difference, A;
60 60  * Region 2: Current difference – a value of maximum relative current excess, A;
61 61  * Delay before setting the error, millisecond;
62 62  * Delay before clearing the error, second;
63 63  * Lock – a flag to block the error until the device is restarted.
64 64  
66 +=== Discharge current limit ===
67 +
68 +The BMS Mini device can check if the discharging current exceeds the estimated limit based on the [[Discharge map>>doc:Battery management systems.BMS Mini S.3\. Configuration.3\.3 Control.WebHome||anchor="HDischargemap"]]. If current exceeds the calculated limit more than configured difference, "Current limit" error is generated.
69 +
70 +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.
71 +
72 +To change the overcurrent protection of the battery, select the "Protections → Discharge current limit" section:
73 +
74 +[[image:1740571296344-411.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="151" width="800"]]
75 +
76 +In this section:
77 +
78 +* Enable – a flag to enable the protection;
79 +* Threshold to switch from Region 1 to Region 2 – a current value at which current excess calculation will be switched from absolute to relative difference, A;
80 +* Region 1: Current difference – a value of maximum absolute current difference, A;
81 +* Region 2: Current difference – a value of maximum relative current excess, A;
82 +* Delay before setting the error, millisecond;
83 +* Delay before clearing the error, second;
84 +* Lock – a flag to block the error until the device is restarted.
85 +
65 65  === Undervoltage ===
66 66  
67 67  The BMS Mini device implements battery protection from too low voltage on the cells.
... ... @@ -68,7 +68,7 @@
68 68  
69 69  To change the battery protection parameters from low voltage on the cells, select the "Protections → Undervoltage" section:
70 70  
71 -[[image:1733748033237-837.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="127" width="800"]]
92 +[[image:1740571345293-460.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
72 72  
73 73  In this section:
74 74  
... ... @@ -75,6 +75,7 @@
75 75  * Enable – a flag to enable the protection;
76 76  * Minimum cell voltage, V;
77 77  * Tolerant cell voltage, V;
99 +* Check the open circuit voltage instead of the actual voltage – a flag to use the U,,ocv,, (corrected due to current and cell resistance) cell voltage instead of measured value;
78 78  * Delay before setting the error, millisecond;
79 79  * Delay before clearing the error, second;
80 80  * Lock – a flag to block the error until the device is restarted.
... ... @@ -95,7 +95,7 @@
95 95  
96 96  To change the battery protection parameters from high voltage on the cells, select the "Protections → Overvoltage" section:
97 97  
98 -[[image:1733748033238-995.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
120 +[[image:1740571383842-536.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="147" width="800"]]
99 99  
100 100  In this section:
101 101  
... ... @@ -102,9 +102,9 @@
102 102  * Enable – a flag to enable the protection;
103 103  * Maximum cell voltage, V;
104 104  * Tolerant cell voltage, V;
127 +* Check the open circuit voltage instead of the actual voltage – a flag to use the U,,ocv,, (corrected due to current and cell resistance) cell voltage instead of measured value;
105 105  * Delay before setting the error, millisecond;
106 106  * Delay before clearing the error, second;
107 -* Switch off the discharging contactor on error – a flag to open the discharging contactor when the "Overvoltage" error is generated;
108 108  * Lock – a flag to block the error until the device is restarted.
109 109  
110 110  As a result of the operation of the battery protection from high voltage, the "Overvoltage" error is generated.
... ... @@ -117,6 +117,33 @@
117 117  
118 118  * 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.
119 119  
142 +=== Cell imbalance ===
143 +
144 +The BMS Mini S 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.
145 +
146 +To change the battery protection parameters from cell imbalance, select the "Protections → Cell imbalance" section:
147 +
148 +[[image:1762772978976-565.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="145" width="800"]]
149 +
150 +In this section:
151 +
152 +* Enable – a flag to enable the protection;
153 +* Maximum cell imbalance, V;
154 +* Tolerant cell imbalance, V;
155 +* Delay before setting the error, millisecond;
156 +* Delay before clearing the error, second;
157 +* Lock – a flag to block the error until the device is restarted.
158 +
159 +As a result of the operation of the battery protection from cell imbalance, the "Cell imbalance” error is generated.
160 +
161 +Error generation conditions:
162 +
163 +* 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.
164 +
165 +Conditions for removing the error:
166 +
167 +* 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.
168 +
120 120  === Low temperature ===
121 121  
122 122  The BMS Mini device implements battery protection from too low temperature.
... ... @@ -260,6 +260,35 @@
260 260  If there is the "Cell count error", the **“Critical error” **is generated.
261 261  )))
262 262  
312 +=== Temperature sensor count ===
313 +
314 +To change the protection parameters from the mismatch of the number of temperature sensors to the set value, select the "Protections → Temperature sensor count" section:
315 +
316 +[[image:1762773073782-768.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="130" width="800"]]
317 +
318 +In this section:
319 +
320 +* Enable – a flag to enable the protection;
321 +* Number of cells – a number of temperature sensors connected to the BMS;
322 +* Delay before setting the error, millisecond;
323 +* Delay before clearing the error, second;
324 +* Lock – a flag to block the error until the device is restarted.
325 +
326 +As a result of the operation of the protection from the mismatch of the number of cells, the "T-sensor count error" is generated.
327 +
328 +Error generation conditions:
329 +
330 +* the number of temperature sensors connected to the BMS is **not equal** to the “Number of temperature sensors” value during the “Delay before setting the error” time.
331 +
332 +Conditions for removing the error:
333 +
334 +* the number of temperature sensors connected to the BMS is **equal** to the “Number of temperature sensors” value during the “Delay before clearing the error” time.
335 +
336 +(% class="box warningmessage" %)
337 +(((
338 +If there is the "T-sensor count error", the **“Critical error” **is generated**.**
339 +)))
340 +
263 263  === Short circuit ===
264 264  
265 265  The BMS Mini device implements a protection of power circuits (contactors, power wires) against overheating caused by the flow of high current for a long time.
... ... @@ -355,6 +355,19 @@
355 355  If there is the “Current sensor error”, the **“Critical error” **is generated.
356 356  )))
357 357  
436 +=== MOSFET ===
437 +
438 +BMS Mini S device checks the status of MOSFET switches that are used to control the contactors. To change the parameters of the MOSFET switch protection, select the "Protections → MOSFET " section:
439 +
440 +[[image:1762773566548-852.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
441 +
442 +In this section:
443 +
444 +* Delay before clearing the error, second;
445 +* Lock – a flag to block the error until the device is restarted.
446 +
447 +The “MOSFET error” occurs when the device detects a shortage in contactor coil control circuit or an overheating of the MOSFET switch. Error is removed when the temperature of power switch is normal during “Delay before clearing the error” time.
448 +
358 358  === Charge contactor cycles ===
359 359  
360 360  The BMS Mini device protects the charging contactor against frequent switching.
... ... @@ -371,7 +371,6 @@
371 371  * Delay before setting the error, millisecond;
372 372  * Delay before clearing the error, second;
373 373  * Lock – a flag to block the error until the device is restarted.
374 -* Number of cycles – a number of the charging contactor switchings made during battery operation.
375 375  
376 376  If there is the high switching frequency of the charging contactor, the “CH contactor cycles error” is generated.
377 377  
... ... @@ -383,13 +383,13 @@
383 383  
384 384  * the “Delay before clearing the error” time has passed since the error was generated.
385 385  
386 -=== Discharge contactor cycles protection ===
476 +=== Discharge contactor cycles ===
387 387  
388 388  The BMS Mini device protects the discharging contactor against frequent switching.
389 389  
390 390  To change the protection parameters against high frequency switching of the discharging contactor, select the "Protections → Discharging contactor cycles" section:
391 391  
392 -[[image:1733748068420-615.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="139" width="800"]]
482 +[[image:1740571600741-802.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="128" width="800"]]
393 393  
394 394  In this section:
395 395  
... ... @@ -399,7 +399,6 @@
399 399  * Delay before setting the error, millisecond;
400 400  * Delay before clearing the error, second;
401 401  * Lock – a flag to block the error until the device is restarted.
402 -* Number of cycles – a number of the charging contactor switchings made during battery operation.
403 403  
404 404  If there is the high switching frequency of the discharging contactor, the “DCH contactor cycles error” is generated.
405 405  
... ... @@ -500,6 +500,11 @@
500 500  
501 501  * charging and discharging contactors are open, but the “Charging current present” or “Discharging current present” signal is set.
502 502  
592 +(% class="box warningmessage" %)
593 +(((
594 +If there is the "Stuck contactor" error, the **“Critical error” **is generated.
595 +)))
596 +
503 503  === Contactor feedback ===
504 504  
505 505  The BMS Mini 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 corresponding contactor feedback pin on X1 header.
... ... @@ -519,6 +519,11 @@
519 519  
520 520  * a command for charging, precharge, discharging, charging/discharging or main contactor not matches its feedback value.
521 521  
616 +(% class="box warningmessage" %)
617 +(((
618 +If there is the "Contactor feedback" error, the **“Critical error” **is generated.
619 +)))
620 +
522 522  === Insulation ===
523 523  
524 524  The BMS Mini device can detect a signal from an external insulation monitoring device (such as Bender IR155) to monitor the insulation quality.
... ... @@ -525,11 +525,15 @@
525 525  
526 526  To change the insulation monitoring parameters, select the "Protections → Insulation" section:
527 527  
528 -[[image:1733748083469-478.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="800"]]
627 +[[image:1740573733492-485.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="119" width="800"]]
529 529  
530 530  In this section:
531 531  
532 532  * Enable – a flag to enable the protection;
632 +* Checking algorithm – isolation checking mode:
633 +** Always on – check is always performed;
634 +** On charging – check is performed only if “Charger connected” or “Charge request” is set;
635 +** Except charging - check is performed only if “Charger connected” and “Charge request” are cleared;
533 533  * Delay before setting the error, second;
534 534  * Delay before clearing the error, second;
535 535  * Lock – a flag to block the error until the device is restarted.
... ... @@ -536,6 +536,11 @@
536 536  
537 537  Error is set if corresponding discrete input is set up and it receives logical zero.
538 538  
642 +(% class="box warningmessage" %)
643 +(((
644 +If there is the "Insulation" error, the **“Critical error” **is generated.
645 +)))
646 +
539 539  === Critical error ===
540 540  
541 541  To change the critical error parameters, select the "Protections → Critical error" section:
... ... @@ -549,21 +549,29 @@
549 549  * Delay before clearing the error, second;
550 550  * Lock – a flag to block the error until the device is restarted.
551 551  
552 -The critical error flag is generated if at least one of the following errors is generated during the “Delay before setting the error” time:
660 +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.
553 553  
554 -* “Battery cover error”;
555 -* “Cell monitor offline”;
556 -* “Cell count error”;
557 -* “ADC error”;
558 -* “Current sensor error”;
559 -* “Shunt offline”;
560 -* “Shunt error”;
561 -* “No temp. sensors”;
562 -* “Temp. sensor is shorted”;
563 -* “Settings error”;
564 -* “WDT reset”;
565 -* “Stuck contactor”;
566 -* “Contactor feedback error”;
567 -* “Insulation fault”.
568 -
569 569  The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
663 +
664 +=== General error ===
665 +
666 +To change the general error parameters, select the "Protections → Critical error" section:
667 +
668 +[[image:1740573914327-561.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="129" width="800"]]
669 +
670 +In this section:
671 +
672 +* Enable – a flag to enable the protection;
673 +* Delay before setting the error, millisecond;
674 +* Delay before clearing the error, second;
675 +* Lock – a flag to block the error until the device is restarted;
676 +* Errors 1, 2 to set the "Critical error" – bitfields to enable check of corresponding errors.
677 +
678 +The “General error” is generated if at least one of the enabled errors is generated during the “Delay before setting the error” time.
679 +
680 +The “General error” is cleared if there are no errors from the enabled errors during the “Delay before clearing the error” time.
681 +
682 +(% class="box warningmessage" %)
683 +(((
684 +The state of the “General error” can be assigned to a discrete output or to a power switch.
685 +)))
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