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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 74.1
edited by Admin
on 2026/02/18 16:34
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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 +
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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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"]]
406 +[[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  
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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;
418 +* 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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