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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 -{{formula fontSize="NORMAL" imageType="PNG"}}
110 -R = \frac{U-U_{ocv}}{I_{stable}}
111 -{{/formula}}
99 +R = (U-U,,ocv,,) / I,,stable,,,
112 112  
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.
101 +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.
114 114  
115 115  The second method is used for a stepwise change in the current through the cell, while the value of the cell resistance:
116 116  
117 117  R = (U,,2,,-U,,1,,) / (I,,stable2,,-I,,stable1,,) provided that | I,,stable2,,-I,,stable1,, | > 0.2 × Q,,max,,
118 118  
119 -{{formula}}
120 -R = frac\{U_2-U_1}{I_{stable2}-I_{stable1}}
121 -{{/formula}}
122 -
123 123  (Q,,max,, is the maximum cell capacity),
124 124  
125 125  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.
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138 138  * Minimum SOC – minimum cell SOC value for resistance calculation;
139 139  * Maximum SOC – maximum cell SOC value for resistance calculation.
140 140  
141 -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).
142 142  
143 -=== Low SOC (signal) ===
127 +=== 3.3.5 Low SOC (signal) ===
144 144  
145 145  To change the parameters of the generation a signal about low battery level, select the "Control → Low SOC (signal)" section:
146 146  
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165 165  
166 166  The "Low SOC signal" is indicative and can be output to a discrete output or a power switch.
167 167  
168 -=== High charging current (signal) ===
152 +=== 3.3.6 High charging current (signal) ===
169 169  
170 170  To change the parameters of the generation high-current signal, select the "Control → High charging current (signal)" section:
171 171  
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190 190  
191 191  The "High charging current" signal is indicative and can be output to a discrete output or a power switch.
192 192  
193 -=== Charge map ===
177 +=== 3.3.7 Charge map ===
194 194  
195 195  The BMS Main 3 device calculates the maximum allowable charge current values in respect to SOC, battery temperature, contactor temperature and cell voltage.
196 196  
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218 218  
219 219  Charging current limit = Maximum charging current × Kcs × Kcc × Kcv × Kct
220 220  
221 -=== Discharge map ===
205 +=== 3.3.8 Discharge map ===
222 222  
223 223  The BMS Main 3 device calculates the maximum allowable discharge current values in respect to SOC, battery temperature, contactor temperature and cell voltage.
224 224  
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246 246  
247 247  Discharging current limit = Maximum discharging current × Kds × Kdc × Kdv × Kdt
248 248  
249 -=== Charge map (PEAK & CONTINUOUS) ===
233 +=== 3.3.9 Charge map (PEAK & CONTINUOUS) ===
250 250  
251 251  The BMS Main 3 has an alternative algorithm for the maximum allowed charging current based on peak and continuous battery operating modes.
252 252  
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274 274  I,,continuous,, = Maximum CONTINUOUS charge current × K,,cc,,
275 275  
276 276  
277 -=== Discharge map (PEAK & CONTINUOUS) ===
261 +=== 3.3.10 Discharge map (PEAK & CONTINUOUS) ===
278 278  
279 279  The BMS Main 3 has an alternative algorithm for the maximum allowed discharging current based on peak and continuous battery operating modes.
280 280  
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301 301  
302 302  I,,continuous,, = Maximum CONTINUOUS discharge current × K,,dc,,
303 303  
304 -=== Charge ===
288 +=== 3.3.11 Charge ===
305 305  
306 306  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.
307 307  
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376 376  
377 377  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.
378 378  
379 -=== Discharge ===
363 +=== 3.3.12 Discharge ===
380 380  
381 381  The device controls the discharging contactor to connect battery to the load.
382 382  
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450 450  * 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;
451 451  * 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;
452 452  
453 -=== Charge/Discharge ===
437 +=== 3.3.13 Charge/Discharge ===
454 454  
455 455  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.
456 456  
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462 462  
463 463  * Enable – a flag to enable the charge/discharge controller.
464 464  
465 -=== Discharge (AUX) ===
449 +=== 3.3.14 Discharge (AUX) ===
466 466  
467 467  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.
468 468  
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489 489  * Maximum voltage – maximum battery voltage, V;
490 490  * 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.
491 491  
492 -=== Main contactor ===
476 +=== 3.3.15 Main contactor ===
493 493  
494 494  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.
495 495  
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544 544  * Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, s;
545 545  * Keep the contactor open until the device is restarted – a flag for keeping the main contactor open until the system is reset.
546 546  
547 -=== Cell balancing ===
531 +=== 3.3.16 Cell balancing ===
548 548  
549 549  Balancing makes the voltage of all cells equal to the minimum cell voltage.
550 550  
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580 580  ** 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);
581 581  ** Balance always – balancing is always performed regardless the battery state;
582 582  
583 -[[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]]
584 584  
585 585  * Minimum cell voltage to start balancing, V;
586 586  * Voltage deviation to start balancing;
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587 587  * Voltage deviation to stop balancing;
588 588  * Command to discharge all cells – a flag to force the balancing of all cells.
589 589  
590 -=== Series balancing ===
574 +=== 3.3.17 Series balancing ===
591 591  
592 592  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.
593 593  
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614 614  * Period – a period to reset of charge counters for each series (to avoid accumulation of error), second;
615 615  * Do not sum series voltages – a flag to disable the summing of series voltages.3
616 616  
617 -=== Power down ===
601 +=== 3.3.18 Power down ===
618 618  
619 619  The BMS Main 3 device can shut down itself if the battery voltage is low or the battery is idle for a long time.
620 620  
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637 637  * Power down if KEYRUN and CHARGE_ON are cleared – a flag to power down the device if KEYRUN and CHARGE_ON signals are cleared;
638 638  * 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.
639 639  
640 -=== Heater ===
624 +=== 3.3.19 Heater ===
641 641  
642 642  To change the parameters of the heater control algorithm, select the "Control → Heater" section:
643 643  
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664 664  
665 665  If there is the "Heater" signal, the heater contactor closes and/or a signal is output to the corresponding digital output.
666 666  
667 -=== Cooler ===
651 +=== 3.3.20 Cooler ===
668 668  
669 669  To change the parameters of the cooler control algorithm, select the "Control → Cooler" section:
670 670  
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691 691  
692 692  If there is the "Cooler" signal, the cooler contactor closes and/or a signal is output to the corresponding digital output.
693 693  
694 -=== High voltage ===
695 695  
679 +1.
680 +11.
681 +111. High voltage
682 +
696 696  The BMS Main 3 device has an ability to measure high voltages before and after contactors.
697 697  
698 698  To change the parameters of high voltage fault, select the "Control → High voltage" section:
699 699  
700 -[[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]]
701 701  
702 702  In this section:
703 703  
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709 709  
710 710  **If there is the “High voltage fault”, the “Critical error” is generated and all contactors open.**
711 711  
712 -=== Cell analysis ===
713 713  
700 +1.
701 +11.
702 +111. Cell analysis
703 +
714 714  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.
715 715  
716 716  The BMS Main 3 device can automatically determine the battery discharge characteristic.
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722 722  
723 723  To configure parameters for determining the discharge characteristic of the battery, select the "Control → Cell analysis" section:
724 724  
725 -[[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]]
726 726  
727 727  In this section:
728 728  
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