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Changes for page 3.3 Control

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1 -Battery management systems.BMS Main 3.3\. Configuration.WebHome
1 +drafts.bms-main-3.3\. Settings.WebHome
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1 -(% data-numbered-headings-start="3" style="--numbered-headings-start: 2;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
2 -= Settings =
1 +=== 3.3.1 Common settings ===
3 3  
4 -(% data-numbered-headings-start="3" style="--numbered-headings-start: 2;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
5 -== Control ==
6 -
7 -=== Common settings ===
8 -
9 9  To change the common BMS settings, select the "Control → Common settings" section:
10 10  
11 -[[image:1735054851946-552.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
5 +[[image:1733322611547-671.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
12 12  
13 13  In this section:
14 14  
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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 -* 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.
13 +* Number of cycles – a number of charge-discharge cycles;
14 +* Reset parameters – a command to reset cells state of charge, capacity, and resistance.
23 23  
24 24  The values “Capacity”, “Resistance”, “Cycles” are used to calculate the SOC of cells and the battery.
25 25  
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33 33  
34 34  The “Reset parameters” command is used for starting-up and adjustment of the battery.
35 35  
36 -=== SOC estimation ===
28 +=== 3.3.2 SOC estimation ===
37 37  
38 38  The BMS Main 3 device calculates the state of charge of the battery (SOC) using two algorithms:
39 39  
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44 44  
45 45  To change the estimation algorithm for calculating the battery SOC, select the "Control → SOC estimation → Algorithm" section:
46 46  
39 +[[image:1733322611549-423.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="148" width="800"]]
47 47  
48 -[[image:1735056107942-306.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="141" width="800"]]
49 -
50 50  The following estimation algorithms supported:
51 51  
52 52  * Voltage – by open circuit voltage;
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70 70  
71 71  * Minimal SOC – the battery SOC is assumed to be the minimum SOC among the cells;
72 72  * Average SOC – the battery SOC is taken equal to the arithmetic average of the cell SOC;
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;
64 +* Min-Max SOC – the battery SOC is taken based on the minimum and maximum SOC of the cells (recommended method).
75 75  
76 76  Other parameters:
77 77  
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85 85  * Coulomb counting correction (temperature) – the dependence of battery capacity on temperature;
86 86  * Coulomb counting correction (cycles) – the dependence of battery capacity on the number of charge-discharge cycles.
87 87  
88 -=== SOC correction ===
78 +=== 3.3.3 SOC correction ===
89 89  
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"]]).
80 +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).
91 91  
92 92  To configure parameters for periodically correcting the battery state of charge, select the "Control → SOC correction" section:
93 93  
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102 102  * Ignore the linear zone – a flag to ignore linear SOC zone while correction (recommended to be unset);
103 103  * Last correction timestamp – time when last correction was made.
104 104  
105 -=== Resistance estimation ===
95 +=== 3.3.4 Resistance estimation ===
106 106  
107 107  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
108 108  
109 109  R = (U-U,,ocv,,) / I,,stable,,,
110 110  
111 -
112 112  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.
113 113  
114 114  The second method is used for a stepwise change in the current through the cell, while the value of the cell resistance:
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133 133  * Minimum SOC – minimum cell SOC value for resistance calculation;
134 134  * Maximum SOC – maximum cell SOC value for resistance calculation.
135 135  
136 -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).
125 +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).
137 137  
138 -=== Low SOC (signal) ===
127 +=== 3.3.5 Low SOC (signal) ===
139 139  
140 140  To change the parameters of the generation a signal about low battery level, select the "Control → Low SOC (signal)" section:
141 141  
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160 160  
161 161  The "Low SOC signal" is indicative and can be output to a discrete output or a power switch.
162 162  
163 -=== High charging current (signal) ===
152 +=== 3.3.6 High charging current (signal) ===
164 164  
165 165  To change the parameters of the generation high-current signal, select the "Control → High charging current (signal)" section:
166 166  
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185 185  
186 186  The "High charging current" signal is indicative and can be output to a discrete output or a power switch.
187 187  
188 -=== Charge map ===
177 +=== 3.3.7 Charge map ===
189 189  
190 190  The BMS Main 3 device calculates the maximum allowable charge current values in respect to SOC, battery temperature, contactor temperature and cell voltage.
191 191  
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213 213  
214 214  Charging current limit = Maximum charging current × Kcs × Kcc × Kcv × Kct
215 215  
216 -=== Discharge map ===
205 +=== 3.3.8 Discharge map ===
217 217  
218 218  The BMS Main 3 device calculates the maximum allowable discharge current values in respect to SOC, battery temperature, contactor temperature and cell voltage.
219 219  
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241 241  
242 242  Discharging current limit = Maximum discharging current × Kds × Kdc × Kdv × Kdt
243 243  
244 -=== Charge map (PEAK & CONTINUOUS) ===
233 +=== 3.3.9 Charge map (PEAK & CONTINUOUS) ===
245 245  
246 246  The BMS Main 3 has an alternative algorithm for the maximum allowed charging current based on peak and continuous battery operating modes.
247 247  
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269 269  I,,continuous,, = Maximum CONTINUOUS charge current × K,,cc,,
270 270  
271 271  
272 -=== Discharge map (PEAK & CONTINUOUS) ===
261 +=== 3.3.10 Discharge map (PEAK & CONTINUOUS) ===
273 273  
274 274  The BMS Main 3 has an alternative algorithm for the maximum allowed discharging current based on peak and continuous battery operating modes.
275 275  
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296 296  
297 297  I,,continuous,, = Maximum CONTINUOUS discharge current × K,,dc,,
298 298  
299 -=== Charge ===
288 +=== 3.3.11 Charge ===
300 300  
301 301  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.
302 302  
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371 371  
372 372  Note – The allow charging contactor closes under two independent conditions: 1) the voltage on the cells reaches the “Voltage to reset the “Ready to charge"” level and 2) the "Delay before recharging" time has passed since the opening of the allow charging contactor.
373 373  
374 -=== Discharge ===
363 +=== 3.3.12 Discharge ===
375 375  
376 376  The device controls the discharging contactor to connect battery to the load.
377 377  
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445 445  * Voltage to clear the “Ready to discharge” – a threshold voltage level on the cell, V; if the voltage of any cell is below this level, the “Ready to discharge” signal is cleared;
446 446  * Voltage to reset the “Ready to discharge” – a tolerant voltage level on the cell, V; if all cells voltages are above the tolerant level, the “Ready to discharge” signal is set;
447 447  
448 -=== Charge/Discharge ===
437 +=== 3.3.13 Charge/Discharge ===
449 449  
450 450  The BMS Main 3 device can control the charging/discharging contactor, which combines algorithms of charging and discharging contactor. It behaves as a charging contactor when “Charge request” or “Charger connected” is set, otherwise – as a discharging contactor.
451 451  
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457 457  
458 458  * Enable – a flag to enable the charge/discharge controller.
459 459  
460 -=== Discharge (AUX) ===
449 +=== 3.3.14 Discharge (AUX) ===
461 461  
462 462  The BMS Main 3 device can control the power supply of external equipment using the auxiliary (AUX) discharging contactor. An example of external equipment can be an inverter that converts DC to AC to power a service laptop and other devices.
463 463  
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484 484  * Maximum voltage – maximum battery voltage, V;
485 485  * 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.
486 486  
487 -=== Main contactor ===
476 +=== 3.3.15 Main contactor ===
488 488  
489 489  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.
490 490  
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539 539  * Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, s;
540 540  * Keep the contactor open until the device is restarted – a flag for keeping the main contactor open until the system is reset.
541 541  
542 -=== Cell balancing ===
531 +=== 3.3.16 Cell balancing ===
543 543  
544 544  Balancing makes the voltage of all cells equal to the minimum cell voltage.
545 545  
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575 575  ** 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);
576 576  ** Balance always – balancing is always performed regardless the battery state;
577 577  
578 -[[image:1733322883462-975.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="74" width="600"]]
567 +[[image:1733322883462-975.png]]
579 579  
580 580  * Minimum cell voltage to start balancing, V;
581 581  * Voltage deviation to start balancing;
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582 582  * Voltage deviation to stop balancing;
583 583  * Command to discharge all cells – a flag to force the balancing of all cells.
584 584  
585 -=== Series balancing ===
574 +=== 3.3.17 Series balancing ===
586 586  
587 587  The BMS Main 3 device supports work with two independent (galvanically unrelated) cell series. To monitor the status of two series, two current sensors are used. A series of cells must be equivalent: they must have the same number of cells and the same capacity.
588 588  
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609 609  * Period – a period to reset of charge counters for each series (to avoid accumulation of error), second;
610 610  * Do not sum series voltages – a flag to disable the summing of series voltages.3
611 611  
612 -=== Power down ===
601 +=== 3.3.18 Power down ===
613 613  
614 614  The BMS Main 3 device can shut down itself if the battery voltage is low or the battery is idle for a long time.
615 615  
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632 632  * Power down if KEYRUN and CHARGE_ON are cleared – a flag to power down the device if KEYRUN and CHARGE_ON signals are cleared;
633 633  * Delay before setting the internal power down signal – a delay before turning off the device power when removing KEYRUN and CHARGE_ON or receiving the “Power down request” command, ms.
634 634  
635 -=== Heater ===
624 +=== 3.3.19 Heater ===
636 636  
637 637  To change the parameters of the heater control algorithm, select the "Control → Heater" section:
638 638  
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659 659  
660 660  If there is the "Heater" signal, the heater contactor closes and/or a signal is output to the corresponding digital output.
661 661  
662 -=== Cooler ===
651 +=== 3.3.20 Cooler ===
663 663  
664 664  To change the parameters of the cooler control algorithm, select the "Control → Cooler" section:
665 665  
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686 686  
687 687  If there is the "Cooler" signal, the cooler contactor closes and/or a signal is output to the corresponding digital output.
688 688  
689 -=== High voltage ===
690 690  
679 +1.
680 +11.
681 +111. High voltage
682 +
691 691  The BMS Main 3 device has an ability to measure high voltages before and after contactors.
692 692  
693 693  To change the parameters of high voltage fault, select the "Control → High voltage" section:
694 694  
695 -[[image:1733322914683-203.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="87" width="800"]]
687 +[[image:1733322914683-203.png]]
696 696  
697 697  In this section:
698 698  
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704 704  
705 705  **If there is the “High voltage fault”, the “Critical error” is generated and all contactors open.**
706 706  
707 -=== Cell analysis ===
708 708  
700 +1.
701 +11.
702 +111. Cell analysis
703 +
709 709  The battery discharge characteristic – the dependence Uocv = Uocv(DOD) – is used to determine the tabular dependence Uocv = Uocv(SOC, t°C), which is necessary for calculating the battery charge level.
710 710  
711 711  The BMS Main 3 device can automatically determine the battery discharge characteristic.
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717 717  
718 718  To configure parameters for determining the discharge characteristic of the battery, select the "Control → Cell analysis" section:
719 719  
720 -[[image:1733322914685-558.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="107" width="800"]]
715 +[[image:1733322914685-558.png]]
721 721  
722 722  In this section:
723 723  
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