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Changes for page 3.4 Protections

Last modified by Admin on 2025/04/09 12:23
From version 4.2
edited by Admin
on 2025/02/26 12:01
Change comment: There is no comment for this version
To version 1.3
edited by Admin
on 2024/12/09 16:56
Change comment: Update document after refactoring.

Summary

Details

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Parent
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1 -Battery management systems.BMS Mini S.3\. Configuration.WebHome
1 +drafts.BMS Mini S.3\. Configuration.WebHome
Content
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6 6  
7 7  The BMS Mini 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 -(% class="box errormessage" %)
10 -(((
11 -**Attention!**
12 -Behavior of contactors at different errors is configured in **corresponding contactor settings**!
13 -)))
14 -
15 15  === Overcurrent ===
16 16  
17 17  The BMS Mini device performs the overcurrent protection depending on current sensor values.
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43 43  * the current is positive (charging) or zero, and its modulo value is less than the “Tolerant charging current” value for the “Delay before clearing the error” time;
44 44  * the current is negative (discharging), and its modulo value is less than the “Tolerant discharging current” value for the “Delay before clearing the error” time.
45 45  
46 -=== Charge current limit ===
40 +(% class="box infomessage" %)
41 +(((
42 +If there is the "Overcurrent" error, the **charging **and **discharging **contactors open.
43 +)))
47 47  
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 -
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 -
52 -To change the overcurrent protection of the battery, select the "Protections → Charge current limit" section:
53 -
54 -[[image:1740571132019-848.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="143" width="800"]]
55 -
56 -In this section:
57 -
58 -* Enable – a flag to enable the protection;
59 -* 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;
60 -* Region 1: Current difference – a value of maximum absolute current difference, A;
61 -* Region 2: Current difference – a value of maximum relative current excess, A;
62 -* Delay before setting the error, millisecond;
63 -* Delay before clearing the error, second;
64 -* Lock – a flag to block the error until the device is restarted.
65 -
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]]
75 -
76 76  === Undervoltage ===
77 77  
78 78  The BMS Mini device implements battery protection from too low voltage on the cells.
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100 100  
101 101  * the minimum voltage among all cells of the battery is greater than the “Tolerant cell voltage” value for the “Delay before clearing the error” time.
102 102  
72 +(% class="box infomessage" %)
73 +(((
74 +If there is the "Undervoltage" error, the **discharging **contactor opens.
75 +)))
76 +
103 103  === Overvoltage ===
104 104  
105 105  The BMS Mini device implements battery protection from too high voltage on the cells.
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128 128  
129 129  * 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.
130 130  
105 +(% class="box infomessage" %)
106 +(((
107 +If there is the "Overvoltage" error, the **charging **contactor and **discharging **contactor open (if the “Switch off the discharging contactor on error” flag is set).
108 +)))
109 +
131 131  === Low temperature ===
132 132  
133 133  The BMS Mini device implements battery protection from too low temperature.
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157 157  
158 158  * the minimum temperature among all cells of the battery is greater than the “Tolerant charging (discharging) temperature” value for the “Delay before clearing the error” time.
159 159  
139 +(% class="box infomessage" %)
140 +(((
141 +If there is the "Low temperature (CH)" error, the **charging **contactor opens. If there is the "Low temperature (DCH)" error, the **discharging **contactor opens.
142 +)))
143 +
160 160  === High temperature ===
161 161  
162 162  The BMS Mini device implements battery protection from too high temperature.
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186 186  
187 187  * the maximum temperature among all cells of the battery is less than the “Tolerant charging (discharging) temperature” value for the “Delay before clearing the error” time.
188 188  
173 +(% class="box infomessage" %)
174 +(((
175 +If there is the "High temperature (CH)" error, the **charging **contactor opens. If there is the "High temperature (DCH)" error, the **discharging **contactor opens.
176 +)))
177 +
189 189  === Battery cover ===
190 190  
191 191  To change the protection parameters from opening the battery cover, select the "Protections → Battery cover" section:
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211 211  
212 212  (% class="box warningmessage" %)
213 213  (((
214 -If there is the "Battery cover error", the **“Critical error” **is generated.
203 +If there is the "Battery cover error", the **“Critical error” **is generated **and all contactors open.**
215 215  )))
216 216  
217 217  === Cell monitor offline ===
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239 239  
240 240  (% class="box warningmessage" %)
241 241  (((
242 -If there is the " Cell monitor offline error", the **“Critical error” **is generated.
231 +If there is the " Cell monitor offline error", the **“Critical error” **is generated and** all contactors open.**
243 243  )))
244 244  
245 245  === Cell count ===
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268 268  
269 269  (% class="box warningmessage" %)
270 270  (((
271 -If there is the "Cell count error", the **“Critical error” **is generated.
260 +If there is the "Cell count error", the **“Critical error” **is generated and **all contactors open.**
272 272  )))
273 273  
274 274  === Short circuit ===
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300 300  
301 301  * the current modulo is lower than the “Maximum current” values for all three protection levels during the “Delay before setting the error” time.
302 302  
292 +(% class="box infomessage" %)
293 +(((
294 +If there is the "Short circuit" error, the **charging **contactor opens (the “Switch off the charging contactor on error” flag is set) and the **discharging **contactor opens (the “Switch off the discharging contactor on error flag” is set).
295 +)))
296 +
303 303  === High contactor temperature ===
304 304  
305 305  The BMS Mini device protects power contactors from overheating. To measure the temperature of the contactor, one of the thermistors connected to the X6 connector is used.
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363 363  
364 364  (% class="box warningmessage" %)
365 365  (((
366 -If there is the “Current sensor error”, the **“Critical error” **is generated.
360 +If there is the “Current sensor error”, the **“Critical error” **is generated and** all contactors open.**
367 367  )))
368 368  
369 369  === Charge contactor cycles ===
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394 394  
395 395  * the “Delay before clearing the error” time has passed since the error was generated.
396 396  
391 +(% class="box infomessage" %)
392 +(((
393 +If there is the "CH contactor cycles error" error, the **charging** contactor opens.
394 +)))
395 +
397 397  === Discharge contactor cycles protection ===
398 398  
399 399  The BMS Mini device protects the discharging contactor against frequent switching.
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422 422  
423 423  * the “Delay before clearing the error” time has passed since the error was generated.
424 424  
424 +(% class="box infomessage" %)
425 +(((
426 +If there is the "DCH contactor cycles error" error, the **discharging **contactor opens.
427 +)))
428 +
425 425  === Temperature sensors ===
426 426  
427 427  The BMS Mini device checks the temperature sensors connection circuits. The circuits are checked for breakage and short-circuit.
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441 441  
442 442  (% class="box warningmessage" %)
443 443  (((
444 -If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error” **is generated.
448 +If there is the “No temp. sensors” or “Temp. sensor is shorted” error, the **“Critical error” **is generated and **all contactors open.**
445 445  )))
446 446  
447 447  === WDT reset ===
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464 464  
465 465  (% class="box warningmessage" %)
466 466  (((
467 -If there is the "WDT reset" error, the **“Critical error” **is generated.
471 +If there is the "WDT reset" error, the **“Critical error” **is generated and **all contactors open.**
468 468  )))
469 469  
470 470  === Unallowable charging ===
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492 492  
493 493  * the battery current is zero during the “Delay before clearing the error” time.
494 494  
499 +(% class="box infomessage" %)
500 +(((
501 +If there is the "Unallowable charging" error, the **discharging **contactor opens.
502 +)))
503 +
495 495  === Stuck contactor ===
496 496  
497 497  The BMS Mini device protects contactors against sticking.
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507 507  * Delay before clearing the error, second;
508 508  * Lock – a flag to block the error until the device is restarted.
509 509  
510 -If there is a stuck contactor, the “Stuck contactor” error is generated. Error generation conditions:
519 +If there is a stuck contactor, the “Stuck contactor” error is generated Error generation conditions:
511 511  
512 512  * charging and discharging contactors are open, but the “Charging current present” or “Discharging current present” signal is set.
513 513  
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578 578  * “Insulation fault”.
579 579  
580 580  The “Critical error” is cleared if there are no errors from the list above during the “Delay before clearing the error” time.
590 +
591 +(% class="box warningmessage" %)
592 +(((
593 +If there is the “Critical error”, **all contactors open.**
594 +)))
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