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Changes for page 3.4 Protections

Last modified by Admin on 2026/04/27 13:04
From version 15.1
edited by Admin
on 2025/04/09 12:23
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To version 30.1
edited by Admin
on 2026/04/27 13:04
Change comment: There is no comment for this version

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... ... @@ -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.
... ... @@ -225,6 +225,36 @@
225 225  If there is the "Battery cover error", the **“Critical error” **is generated.
226 226  )))
227 227  
255 +=== High board temperature ===
256 +
257 +BMS Mini monitors its temperature and disables the cell balancing when it overheats.
258 +
259 +To change the overheating protection parameters of BMS Mini device, select the "Protections → High board temperature" section:
260 +
261 +[[image:1777295045614-956.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="136" width="800"]]In this section:
262 +
263 +* Enable – a flag to enable the protection;
264 +* Maximum temperature, °C;
265 +* Tolerant temperature, °C;
266 +* Delay before setting the error, second;
267 +* Delay before clearing the error, second;
268 +* Lock – lock the error until the device is reset.
269 +
270 +As a result of the operation of the protection from high temperatures of BMS Mini device, the "High board temperature" is generated.
271 +
272 +Error generation conditions:
273 +
274 +* a BMS Mini device temperature is higher than the “Maximum temperature” value.
275 +
276 +Conditions for removing the error:
277 +
278 +* a BMS Mini device temperature is less than the “Tolerant temperature” value.
279 +
280 +(% class="box infomessage" %)
281 +(((
282 +Cell balancing is disabled on BMS Mini device with high temperature.
283 +)))
284 +
228 228  === Cell monitor offline ===
229 229  
230 230  The BMS Mini device checks if there is connection with cell monitor and set an error if not.
... ... @@ -282,6 +282,35 @@
282 282  If there is the "Cell count error", the **“Critical error” **is generated.
283 283  )))
284 284  
342 +=== Temperature sensor count ===
343 +
344 +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:
345 +
346 +[[image:1762773073782-768.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="130" width="800"]]
347 +
348 +In this section:
349 +
350 +* Enable – a flag to enable the protection;
351 +* Number of cells – a number of temperature sensors connected to the BMS;
352 +* Delay before setting the error, millisecond;
353 +* Delay before clearing the error, second;
354 +* Lock – a flag to block the error until the device is restarted.
355 +
356 +As a result of the operation of the protection from the mismatch of the number of cells, the "T-sensor count error" is generated.
357 +
358 +Error generation conditions:
359 +
360 +* 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.
361 +
362 +Conditions for removing the error:
363 +
364 +* 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.
365 +
366 +(% class="box warningmessage" %)
367 +(((
368 +If there is the "T-sensor count error", the **“Critical error” **is generated**.**
369 +)))
370 +
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 +377,24 @@
377 377  If there is the “Current sensor error”, the **“Critical error” **is generated.
378 378  )))
379 379  
466 +=== MOSFET ===
467 +
468 +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:
469 +
470 +[[image:1762773566548-852.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
471 +
472 +In this section:
473 +
474 +* Delay before clearing the error, second;
475 +* Lock – a flag to block the error until the device is restarted.
476 +
477 +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 MOSFET switch is normal during “Delay before clearing the error” time.
478 +
479 +(% class="box warningmessage" %)
480 +(((
481 +If there is the "MOSFET error", the **“Critical error” **is generated.
482 +)))
483 +
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 ===
511 +=== Discharge contactor cycles ===
408 408  
409 409  The BMS Mini device protects the discharging contactor against frequent switching.
410 410  
... ... @@ -579,7 +579,7 @@
579 579  
580 580  To change the critical error parameters, select the "Protections → Critical error" section:
581 581  
582 -[[image:1733748083469-183.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="101" width="800"]]
686 +[[image:1762775067035-203.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="143" width="800"]]
583 583  
584 584  In this section:
585 585  
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586 586  * Enable – a flag to enable the protection;
587 587  * Delay before setting the error, millisecond;
588 588  * Delay before clearing the error, second;
693 +* Errors 1,2 to ignore when setting the critical error;
589 589  * Lock – a flag to block the error until the device is restarted.
590 590  
591 591  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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