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Changes for page 3.3 Control

Last modified by Admin on 2026/04/30 15:56
From version 65.1
edited by Admin
on 2025/10/14 10:02
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To version 76.2
edited by Admin
on 2026/03/31 12:14
Change comment: There is no comment for this version

Summary

Details

Page properties
Content
... ... @@ -14,6 +14,7 @@
14 14  
15 15  * Cell capacity – nominal capacity of cells, Ah;
16 16  * Cell resistance – nominal (maximum) internal resistance of the cells, Ohm;
17 +* Connection of cells –
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 19  * Reset parameters – a command to reset cells state of charge, capacity, and resistance;
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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  
106 +=== SOH estimation ===
107 +
108 +The BMS Main 3 device calculates the state of health of the battery (SOH) using two algorithms:
109 +
110 +* By effective capacity;
111 +* By total charge-.
112 +
113 +In "By effective capacity" mode SOH is calculated as a ratio of effective capacity to nominal capacity. Effective capacity is estimated to DOD value when battery SOC reaches 0%, so SOH is recalculated each full battery discharge.
114 +
115 +In "By total charge-" mode SOH is calculated as a linear function of "Total charge-" counter. While "Total charge-" constantly increases during battery operation, SOH will be linearly decrease at the same time. This mode requires a confirmed data about cell health depending of amount of discharge rate to configure the linear function.
116 +
117 +To configure parameters for battery state of health calculation, select the "Control → SOH correction" section:
118 +
119 +[[image:1765447975228-766.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="96" width="800"]]In this section:
120 +
121 +* Algorithm:
122 +** By effective capacity;
123 +** By total charge-;
124 +* Total charge: Charge- –  total amount of charge- for expected SOH;
125 +* Total charge: SOH –  expected SOH value at the total amount of charge-.
126 +
105 105  === 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
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356 356  
357 357  To change the parameters of charging process status, select the "Control → Charging status" section:
358 358  
359 -[[image:1760435790050-496.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="140" width="800"]]
381 +[[image:1771432488941-251.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="154" width="800"]]
360 360  
361 361  In this section:
362 362  
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364 364  * Current to clear the "Charging current present" – a current level to clear the "Charging current present" signal, A;
365 365  * Voltage to clear the “Ready to charge” – a threshold U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if the voltage of any cell is above this level, the “Ready to charge” (hence, the “Allow charging”) signal is cleared;
366 366  * Voltage to reset the “Ready to charge” – a tolerant U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if all cell voltages are below the tolerant level, the “Ready to charge” (hence, the “Allow charging”) signal is set;
389 +* Use actual voltage to generate the "Ready to charge" signal – a flag to disable voltage correction for "Ready to charge" signal;
367 367  * Treat negative currents as zero currents for generating the "Ready to charge" signal – a flag to disable voltage correction for "Ready to charge" signal at discharging current;
368 368  * Delay before recharging – a time after which the previously opened the allow charging contactor closes again, minute; to disable the operation by timeout set "Delay before recharging" to 0;
369 369  * Check the 'Charge current limit' value to generate the 'Ready to charge' – a flag to enable check of "Charging current limit" to generate the "Ready to charge" signal;
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382 382  
383 383  To change the parameters of discharging process status, select the "Control → Discharging status" section:
384 384  
385 -[[image:1760435802140-274.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="129" width="800"]]
408 +[[image:1771431570393-551.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="155" width="800"]]
386 386  
387 387  In this section:
388 388  
... ... @@ -390,10 +390,12 @@
390 390  * Current to clear the "Discharging current present" – a current level to clear the "Discharging current present" signal, А;
391 391  * Voltage to clear the “Ready to discharge” – a threshold U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if the voltage of any cell is below this level, the “Ready to discharge” signal is cleared;
392 392  * Voltage to reset the “Ready to discharge” – a tolerant U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if all cells voltages are above the tolerant level, the “Ready to discharge” signal is set;
416 +* Use actual voltage to generate the "Ready to discharge" signal – a flag to disable voltage correction for "Ready to discharge" signal;
393 393  * Treat positive currents as zero currents for generating the "Ready to discharge" signal – a flag to disable voltage correction for "Ready to discharge" signal at charging current;
394 394  * Check the 'Discharge current limit' value to generate the 'Ready to discharge' – a flag to enable check of "Discharging current limit" to generate the "Ready to discharge" signal;
395 395  * Discharge current limit to clear the 'Ready to discharge' – a threshold discharging current limit value, A; if the limit is //above //this level, the “Ready to discharge” signal is cleared;
396 396  * Discharge current limit to set the 'Ready to discharge' – a tolerant discharging current limit value, A; if the limit is //below //this level, the “Ready to discharge” signal is set;
421 +* Clear the 'Ready to discharge' signal if the 'Low SOC' signal is set;
397 397  * Errors 1, 2 to clear the "Ready to discharge" – bitfields to choose the errors which will clear the "Ready to discharge" signal.
398 398  
399 399  === Precharge ===
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