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Changes for page 3.3 Control

Last modified by Admin on 2025/12/11 10:32
From version 70.1
edited by Admin
on 2025/12/11 10:32
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To version 53.7
edited by Admin
on 2025/06/19 10:27
Change comment: There is no comment for this version

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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 -=== SOH estimation ===
106 -
107 -The BMS Main 3 device calculates the state of health of the battery (SOH) using two algorithms:
108 -
109 -* By effective capacity;
110 -* By total charge-.
111 -
112 -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.
113 -
114 -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.
115 -
116 -To configure parameters for battery state of health calculation, select the "Control → SOH correction" section:
117 -
118 -[[image:1765447975228-766.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="96" width="800"]]In this section:
119 -
120 -* Algorithm:
121 -** By effective capacity;
122 -** By total charge-;
123 -* Total charge: Charge- –  total amount of charge- for expected SOH;
124 -* Total charge: SOH –  expected SOH value at the total amount of charge-.
125 -
126 126  === Resistance estimation ===
127 127  
128 128  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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377 377  
378 378  To change the parameters of charging process status, select the "Control → Charging status" section:
379 379  
380 -[[image:1760435790050-496.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="140" width="800"]]
359 +[[image:1750261016583-434.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="114" width="800"]]
381 381  
382 382  In this section:
383 383  
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387 387  * 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;
388 388  * 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;
389 389  * 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;
390 -* 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;
391 -* Charge current limit to clear the 'Ready to charge' – a threshold charging current limit value, A; if the limit is //above //this level, the “Ready to charge” signal is cleared;
392 -* Charge current limit to set the 'Ready to charge' – a tolerant charging current limit value, A; if the limit is //below //this level, the “Ready to charge” signal is set;
393 393  * Errors 1, 2 to clear the "Ready to charge" – bitfields to choose the errors which will clear the "Ready to charge" signal.
394 394  
395 395  (% class="box infomessage" %)
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403 403  
404 404  To change the parameters of discharging process status, select the "Control → Discharging status" section:
405 405  
406 -[[image:1760435802140-274.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="129" width="800"]]
382 +[[image:1750261289590-730.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="103" width="800"]]
407 407  
408 408  In this section:
409 409  
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412 412  * 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;
413 413  * 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;
414 414  * 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;
415 -* 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;
416 -* 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;
417 -* 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;
418 418  * Errors 1, 2 to clear the "Ready to discharge" – bitfields to choose the errors which will clear the "Ready to discharge" signal.
419 419  
420 420  === Precharge ===
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432 432  * Precharge current threshold to finish precharging – a minimum current value at which precharging process assumed to be finished, A;
433 433  * Check voltages before and after contactors to finish precharging – a flag to check the voltages before and after contactors to ensure that precharge process has finished and it is allowed to close the discharging contactor;
434 434  * Minimum voltage difference to finish precharging – minimal voltage difference before and after contactors at which precharge process is meant to be finished, V;
435 -* Keep the precharging relay closed until precharge is finished – a flag to ignore the Precharge time and wait precharging to finish before open precharge relay;
436 436  * Number of precharging attempts – maximum number of precharging attempts before setting the "Precharge error";
437 437  * Delay before current measurement – a delay before first current measurement after closing precharge, millisecond;
438 438  * Precharge time – a duration of closing the precharge contactor before closing the discharging contactor, millisecond;
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