Skip to Content

Changes for page 3.3 Control

Last modified by Admin on 2025/04/09 12:14
From version 4.3
edited by Admin
on 2024/12/11 11:33
Change comment: Update document after refactoring.
To version 11.1
edited by Admin
on 2024/12/24 16:28
Change comment: There is no comment for this version

Summary

Details

Page properties
Parent
... ... @@ -1,1 +1,1 @@
1 -Battery management systems.BMS Main 3.3\. Settings.WebHome
1 +Battery management systems.BMS Main 3.3\. Configuration.WebHome
Content
... ... @@ -8,7 +8,7 @@
8 8  
9 9  To change the common BMS settings, select the "Control → Common settings" section:
10 10  
11 -[[image:1733322611547-671.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
11 +[[image:1735054851946-552.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
12 12  
13 13  In this section:
14 14  
... ... @@ -16,8 +16,10 @@
16 16  * Cell resistance – nominal (maximum) internal resistance of the cells, Ohm;
17 17  * Relax time (after charging) – a relaxation time after charging, second;
18 18  * Relax time (atfer discharging) – a relaxation time after discharging, second;
19 -* Number of cycles – a number of charge-discharge cycles;
20 -* Reset parameters – a command to reset cells state of charge, capacity, and resistance.
19 +* Reset parameters – a command to reset cells state of charge, capacity, and resistance;
20 +* Method of calculating the battery voltage:
21 +** Summation of cell voltages – the overall voltage is calculated as on sum of all cells in the battery;
22 +** Using voltage before contactors – the overall voltage is estimated as voltage before contactors measured by BMS.
21 21  
22 22  The values “Capacity”, “Resistance”, “Cycles” are used to calculate the SOC of cells and the battery.
23 23  
... ... @@ -42,8 +42,9 @@
42 42  
43 43  To change the estimation algorithm for calculating the battery SOC, select the "Control → SOC estimation → Algorithm" section:
44 44  
45 -[[image:1733322611549-423.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="148" width="800"]]
46 46  
48 +[[image:1735056107942-306.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="141" width="800"]]
49 +
47 47  The following estimation algorithms supported:
48 48  
49 49  * Voltage – by open circuit voltage;
... ... @@ -67,7 +67,8 @@
67 67  
68 68  * Minimal SOC – the battery SOC is assumed to be the minimum SOC among the cells;
69 69  * Average SOC – the battery SOC is taken equal to the arithmetic average of the cell SOC;
70 -* Min-Max SOC – the battery SOC is taken based on the minimum and maximum SOC of the cells (recommended method).
73 +* Min-Max SOC – the battery SOC is calculated based on the minimum and maximum SOC of the cells. Final SOC will be a) 100% if any cell have 100% SOC, b) 0% if any cell have 0% SOC;
74 +* Max-Min SOC – the battery SOC is calculated based on the minimum and maximum SOC of the cells. Final SOC will be a) 100% if all cells have 100% SOC, b) 0% if all cells have 0% SOC;
71 71  
72 72  Other parameters:
73 73  
... ... @@ -83,7 +83,7 @@
83 83  
84 84  === SOC correction ===
85 85  
86 -The BMS Main 3 device can recalculate the battery SOC after long-term storage or after long-term working in the case when the battery was not charged fully or discharged totally. Recalculation is done based on the tabular dependency Uocv = Uocv (SOC, t) (see section** **2.3.2).
90 +The BMS Main 3 device can recalculate the battery SOC after long-term storage or after long-term working in the case when the battery was not charged fully or discharged totally. Recalculation is done based on the tabular dependency Uocv = Uocv (SOC, t) (see [[SOC estimation>>doc:||anchor="HSOCestimation"]]).
87 87  
88 88  To configure parameters for periodically correcting the battery state of charge, select the "Control → SOC correction" section:
89 89  
... ... @@ -102,18 +102,26 @@
102 102  
103 103  Calculation of the resistance of cells is carried out in two ways. The first method is used when the battery passes from a relaxation state to a charge or discharge state, wherein the cell resistance value
104 104  
105 -R = (U-U,,ocv,,) / I,,stable,,,
109 +{{formula fontSize="SMALL" imageType="PNG"}}
110 +R = \frac{U-U_{ocv}}{I_{stable}}
111 +{{/formula}}
106 106  
107 -where U is the cell voltage measured in the charge or discharge state, V; U,,ocv,, is the cell voltage measured in the state of relaxation (before switching to the state of charge or discharge); I,,stable,, – stabilized current through the cell in the state of charge or discharge.
113 +where U — the cell voltage measured in the charge or discharge state, V; U,,ocv,, — cell voltage measured in the state of relaxation (before switching to the state of charge or discharge); I,,stable,, — stabilized current through the cell in the state of charge or discharge.
108 108  
109 109  The second method is used for a stepwise change in the current through the cell, while the value of the cell resistance:
110 110  
111 -R = (U,,2,,-U,,1,,) / (I,,stable2,,-I,,stable1,,) provided that | I,,stable2,,-I,,stable1,, | > 0.2 × Q,,max,,
117 +{{formula fontSize="SMALL"}}
118 +R = \frac{U_2-U_1}{I_{stable2}-I_{stable1}}
119 +{{/formula}}
112 112  
113 -(Q,,max,, is the maximum cell capacity),
121 +provided that
114 114  
115 -where U,,2,, is the voltage on the cell at the moment when the stabilized current I,,stable2,, is flowing through it; U,,1,, – the voltage on the cell at the moment when the stabilized current I,,stable1,, flowing through it.
123 +{{formula fontSize="SMALL"}}
124 +| I_{stable2}-I_{stable1} | > 0.2 × Qmax
125 +{{/formula}}
116 116  
127 +where Q,,max,, — the maximum cell capacity,U,,2,, — voltage on the cell at the moment when the stabilized current I,,stable2,, is flowing through it; U,,1,, — the voltage on the cell at the moment when the stabilized current I,,stable1,, flowing through it.
128 +
117 117  The stabilized current I,,stable,, = I, if during the stabilization time the instantaneous current I is in the range from 0.95 × I to 1.05 × I.
118 118  
119 119  To change parameters of the algorithm for calculating the cell resistance, select the "Control → Resistance estimation" section:
... ... @@ -128,7 +128,7 @@
128 128  * Minimum SOC – minimum cell SOC value for resistance calculation;
129 129  * Maximum SOC – maximum cell SOC value for resistance calculation.
130 130  
131 -The calculated resistance is accepted by the system as valid (and therefore updated) if its value is in the range from Resistance/2 to “Maximum resistance factor” × Resistance, where "Resistance" is the nominal resistance of the cell (see section 2.3.1). If the calculated resistance value is greater than the value (Maximum resistance factor × Resistance), the updated resistance value will be equal to the value (Maximum resistance factor × Resistance).
143 +The calculated resistance is accepted by the system as valid (and therefore updated) if its value is in the range from Resistance / 2 to “Maximum resistance factor” × Resistance, where "Resistance" is the nominal resistance of the cell (see [[Common settings>>doc:||anchor="HCommonsettings"]]). If the calculated resistance value is greater than the value (Maximum resistance factor × Resistance), the updated resistance value will be equal to the value (Maximum resistance factor × Resistance).
132 132  
133 133  === Low SOC (signal) ===
134 134  
... ... @@ -263,7 +263,6 @@
263 263  
264 264  I,,continuous,, = Maximum CONTINUOUS charge current × K,,cc,,
265 265  
266 -
267 267  === Discharge map (PEAK & CONTINUOUS) ===
268 268  
269 269  The BMS Main 3 has an alternative algorithm for the maximum allowed discharging current based on peak and continuous battery operating modes.
... ... @@ -291,6 +291,75 @@
291 291  
292 292  I,,continuous,, = Maximum CONTINUOUS discharge current × K,,dc,,
293 293  
305 +
306 +
307 +=== Main contactor ===
308 +
309 +The BMS Main 3 device controls the main contactor. The main contactor is usually placed in the common (minus) battery line for opening the charge and discharge circuits in case of sealing of the charging or discharging contactors.
310 +
311 +The Main contactor algorithm supports the following modes:
312 +
313 +* Always on;
314 +* Automatic;
315 +* On demand.
316 +
317 +In “Always on” mode main contactor closes if all the following is true:
318 +
319 +* Charging contactor is open;
320 +* Discharging contactor is open;
321 +* There are no errors from the list below:
322 +** Overcurrent;
323 +** Undervoltage;
324 +** Overvoltage;
325 +** High temperature (CH);
326 +** High temperature (DCH);
327 +** Unallowable charging;
328 +** Critical error.
329 +
330 +In “Always on” mode main contactor opens if all the following is true:
331 +
332 +* Charging contactor is open;
333 +* Discharging contactor is open;
334 +* There is an error from the list below:
335 +** Overcurrent;
336 +** Undervoltage;
337 +** Overvoltage;
338 +** High temperature (CH);
339 +** High temperature (DCH);
340 +** Unallowable charging;
341 +** Critical error.
342 +
343 +In “Automatic” mode, the main contactor closes by internal charging and discharging algorithms at the same time with Precharging, Charging and Discharging contactors.
344 +
345 +In “On demand” mode, the main contactor closes by external the “Close Main contactor” request.
346 +
347 +To change the parameters of the main contactor, select the "Control → Main contactor" section:
348 +
349 +[[image:1733322872744-536.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
350 +
351 +In this section:
352 +
353 +* Enable – a flag to enable the main contactor control;
354 +* Algorithm – main contactor control algorithm:
355 +** Always on – contactor is always closed;
356 +** Automatic – contactor closes by internal charge and discharge algorithms;
357 +** On demand – contactor is closed by an external request;
358 +* Time to keep the contactor closed before closing the others – a time for other contactors to be open after the main contactor is closed;
359 +* Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, s;
360 +* Keep the contactor open until the device is restarted – a flag for keeping the main contactor open until the system is reset.
361 +
362 +=== Charging status ===
363 +
364 +TBA
365 +
366 +=== Discharging status ===
367 +
368 +TBA
369 +
370 +=== Precharge ===
371 +
372 +TBA
373 +
294 294  === Charge ===
295 295  
296 296  There are two contactors that serve charging the battery: a charging contactor and an allow charging contactor. With the help of the allow charging contactor, the BMS commands the charger to start or stop charging.
... ... @@ -479,61 +479,6 @@
479 479  * Maximum voltage – maximum battery voltage, V;
480 480  * Switch off the discharging (AUX) contactor on errors – the auxiliary (AUX) discharging contactor opens if the following errors occur: Undervoltage, Overcurrent, High temperature (DCH), Short circuit, Critical error.
481 481  
482 -=== Main contactor ===
483 -
484 -The BMS Main 3 device controls the main contactor. The main contactor is usually placed in the common (minus) battery line for opening the charge and discharge circuits in case of sealing of the charging or discharging contactors.
485 -
486 -The Main contactor algorithm supports the following modes:
487 -
488 -* Always on;
489 -* Automatic;
490 -* On demand.
491 -
492 -In “Always on” mode main contactor closes if all the following is true:
493 -
494 -* Charging contactor is open;
495 -* Discharging contactor is open;
496 -* There are no errors from the list below:
497 -** Overcurrent;
498 -** Undervoltage;
499 -** Overvoltage;
500 -** High temperature (CH);
501 -** High temperature (DCH);
502 -** Unallowable charging;
503 -** Critical error.
504 -
505 -In “Always on” mode main contactor opens if all the following is true:
506 -
507 -* Charging contactor is open;
508 -* Discharging contactor is open;
509 -* There is an error from the list below:
510 -** Overcurrent;
511 -** Undervoltage;
512 -** Overvoltage;
513 -** High temperature (CH);
514 -** High temperature (DCH);
515 -** Unallowable charging;
516 -** Critical error.
517 -
518 -In “Automatic” mode, the main contactor closes by internal charging and discharging algorithms at the same time with Precharging, Charging and Discharging contactors.
519 -
520 -In “On demand” mode, the main contactor closes by external the “Close Main contactor” request.
521 -
522 -To change the parameters of the main contactor, select the "Control → Main contactor" section:
523 -
524 -[[image:1733322872744-536.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
525 -
526 -In this section:
527 -
528 -* Enable – a flag to enable the main contactor control;
529 -* Algorithm – main contactor control algorithm:
530 -** Always on – contactor is always closed;
531 -** Automatic – contactor closes by internal charge and discharge algorithms;
532 -** On demand – contactor is closed by an external request;
533 -* Time to keep the contactor closed before closing the others – a time for other contactors to be open after the main contactor is closed;
534 -* Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, s;
535 -* Keep the contactor open until the device is restarted – a flag for keeping the main contactor open until the system is reset.
536 -
537 537  === Cell balancing ===
538 538  
539 539  Balancing makes the voltage of all cells equal to the minimum cell voltage.
... ... @@ -570,7 +570,7 @@
570 570  ** Balance on charge or relaxed - balancing is performed while and after the charging and in the relaxed state (in “Charge ON”, “Charge OFF”, “Relaxed (after charging)” and “Relaxed (after discharging)” states);
571 571  ** Balance always – balancing is always performed regardless the battery state;
572 572  
573 -[[image:1733322883462-975.png]]
598 +[[image:1733322883462-975.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="74" width="600"]]
574 574  
575 575  * Minimum cell voltage to start balancing, V;
576 576  * Voltage deviation to start balancing;
1735054851946-552.png
Author
... ... @@ -1,0 +1,1 @@
1 +XWiki.admin
Size
... ... @@ -1,0 +1,1 @@
1 +22.9 KB
Content
1735056052237-170.png
Author
... ... @@ -1,0 +1,1 @@
1 +XWiki.admin
Size
... ... @@ -1,0 +1,1 @@
1 +32.1 KB
Content
1735056107942-306.png
Author
... ... @@ -1,0 +1,1 @@
1 +XWiki.admin
Size
... ... @@ -1,0 +1,1 @@
1 +33.0 KB
Content