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Changes for page 3.4 Protections

Last modified by Admin on 2025/11/10 11:45
From version 9.1
edited by Admin
on 2025/02/26 12:44
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To version 24.2
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on 2025/11/10 11:20
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... ... @@ -96,7 +96,7 @@
96 96  * Enable – a flag to enable the protection;
97 97  * Minimum cell voltage, V;
98 98  * Tolerant cell voltage, V;
99 -* Check the open circuit voltage instead of the actual voltage – a flag to enable the check of voltage correction due to current and cell resistance;
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;
100 100  * Delay before setting the error, millisecond;
101 101  * Delay before clearing the error, second;
102 102  * Lock – a flag to block the error until the device is restarted.
... ... @@ -124,7 +124,7 @@
124 124  * Enable – a flag to enable the protection;
125 125  * Maximum cell voltage, V;
126 126  * Tolerant cell voltage, V;
127 -* Check the open circuit voltage instead of the actual voltage – a flag to enable the check of voltage correction due to current and cell resistance;
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;
128 128  * Delay before setting the error, millisecond;
129 129  * Delay before clearing the error, second;
130 130  * Lock – a flag to block the error until the device is restarted.
... ... @@ -139,6 +139,33 @@
139 139  
140 140  * 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.
141 141  
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 +
142 142  === Low temperature ===
143 143  
144 144  The BMS Mini device implements battery protection from too low temperature.
... ... @@ -282,6 +282,35 @@
282 282  If there is the "Cell count error", the **“Critical error” **is generated.
283 283  )))
284 284  
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 +
285 285  === Short circuit ===
286 286  
287 287  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.
... ... @@ -377,6 +377,19 @@
377 377  If there is the “Current sensor error”, the **“Critical error” **is generated.
378 378  )))
379 379  
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 +
380 380  === Charge contactor cycles ===
381 381  
382 382  The BMS Mini device protects the charging contactor against frequent switching.
... ... @@ -404,7 +404,7 @@
404 404  
405 405  * the “Delay before clearing the error” time has passed since the error was generated.
406 406  
407 -=== Discharge contactor cycles protection ===
476 +=== Discharge contactor cycles ===
408 408  
409 409  The BMS Mini device protects the discharging contactor against frequent switching.
410 410  
... ... @@ -520,6 +520,11 @@
520 520  
521 521  * charging and discharging contactors are open, but the “Charging current present” or “Discharging current present” signal is set.
522 522  
592 +(% class="box warningmessage" %)
593 +(((
594 +If there is the "Stuck contactor" error, the **“Critical error” **is generated.
595 +)))
596 +
523 523  === Contactor feedback ===
524 524  
525 525  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.
... ... @@ -539,6 +539,11 @@
539 539  
540 540  * a command for charging, precharge, discharging, charging/discharging or main contactor not matches its feedback value.
541 541  
616 +(% class="box warningmessage" %)
617 +(((
618 +If there is the "Contactor feedback" error, the **“Critical error” **is generated.
619 +)))
620 +
542 542  === Insulation ===
543 543  
544 544  The BMS Mini device can detect a signal from an external insulation monitoring device (such as Bender IR155) to monitor the insulation quality.
... ... @@ -560,6 +560,11 @@
560 560  
561 561  Error is set if corresponding discrete input is set up and it receives logical zero.
562 562  
642 +(% class="box warningmessage" %)
643 +(((
644 +If there is the "Insulation" error, the **“Critical error” **is generated.
645 +)))
646 +
563 563  === Critical error ===
564 564  
565 565  To change the critical error parameters, select the "Protections → Critical error" section:
... ... @@ -576,3 +576,26 @@
576 576  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.
577 577  
578 578  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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