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Changes for page 3.3 Control

Last modified by Admin on 2025/04/09 12:14
From version 6.4
edited by Admin
on 2024/12/24 15:43
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To version 10.8
edited by Admin
on 2024/12/24 16:27
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... ... @@ -19,7 +19,7 @@
19 19  * Reset parameters – a command to reset cells state of charge, capacity, and resistance;
20 20  * Method of calculating the battery voltage:
21 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
22 +** Using voltage before contactors – the overall voltage is estimated as voltage before contactors measured by BMS.
23 23  
24 24  The values “Capacity”, “Resistance”, “Cycles” are used to calculate the SOC of cells and the battery.
25 25  
... ... @@ -44,8 +44,9 @@
44 44  
45 45  To change the estimation algorithm for calculating the battery SOC, select the "Control → SOC estimation → Algorithm" section:
46 46  
47 -[[image:1733322611549-423.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="148" width="800"]]
48 48  
48 +[[image:1735056107942-306.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="141" width="800"]]
49 +
49 49  The following estimation algorithms supported:
50 50  
51 51  * Voltage – by open circuit voltage;
... ... @@ -69,7 +69,8 @@
69 69  
70 70  * Minimal SOC – the battery SOC is assumed to be the minimum SOC among the cells;
71 71  * Average SOC – the battery SOC is taken equal to the arithmetic average of the cell SOC;
72 -* Min-Max SOC – the battery SOC is taken based on the minimum and maximum SOC of the cells (recommended method).
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;
73 73  
74 74  Other parameters:
75 75  
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104 104  
105 105  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
106 106  
107 -R = (U-U,,ocv,,) / I,,stable,,,
109 +{{formula fontSize="SMALL" imageType="PNG"}}
110 +R = \frac{U-U_{ocv}}{I_{stable}}
111 +{{/formula}}
108 108  
109 -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 +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.
110 110  
111 111  The second method is used for a stepwise change in the current through the cell, while the value of the cell resistance:
112 112  
113 -R = (U,,2,,-U,,1,,) / (I,,stable2,,-I,,stable1,,) provided that | I,,stable2,,-I,,stable1,, | > 0.2 × Q,,max,,
117 +{{formula fontSize="SMALL"}}
118 +R = \frac{U_2-U_1}{I_{stable2}-I_{stable1}}
119 +{{/formula}}
114 114  
115 -(Q,,max,, is the maximum cell capacity),
121 +provided that
116 116  
117 -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.
123 +{{formula fontSize="SMALL"}}
124 +| I_{stable2}-I_{stable1} | > 0.2 × Qmax
125 +{{/formula}}
118 118  
127 +where Q,,max,, — the maximum cell capacity,U,,2,, — 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.
128 +
119 119  The stabilized current I,,stable,, = I, if during the stabilization time the instantaneous current I is in the range from 0.95 × I to 1.05 × I.
120 120  
121 121  To change parameters of the algorithm for calculating the cell resistance, select the "Control → Resistance estimation" section:
... ... @@ -130,7 +130,7 @@
130 130  * Minimum SOC – minimum cell SOC value for resistance calculation;
131 131  * Maximum SOC – maximum cell SOC value for resistance calculation.
132 132  
133 -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).
143 +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).
134 134  
135 135  === Low SOC (signal) ===
136 136  
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265 265  
266 266  I,,continuous,, = Maximum CONTINUOUS charge current × K,,cc,,
267 267  
268 -
269 269  === Discharge map (PEAK & CONTINUOUS) ===
270 270  
271 271  The BMS Main 3 has an alternative algorithm for the maximum allowed discharging current based on peak and continuous battery operating modes.
... ... @@ -293,6 +293,21 @@
293 293  
294 294  I,,continuous,, = Maximum CONTINUOUS discharge current × K,,dc,,
295 295  
305 +=== Main contactor ===
306 +
307 +TBA
308 +
309 +=== Charging status ===
310 +
311 +TBA
312 +
313 +=== Discharging status ===
314 +
315 +TBA
316 +
317 +=== Precharge ===
318 +
319 +
296 296  === Charge ===
297 297  
298 298  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.
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