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Changes for page 3.3 Control

Last modified by Admin on 2025/04/09 12:14
From version 10.2
edited by Admin
on 2024/12/24 16:15
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To version 10.8
edited by Admin
on 2024/12/24 16:27
Change comment: There is no comment for this version

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... ... @@ -106,19 +106,26 @@
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 -R = (U-U,,ocv,,) / I,,stable,,,
109 +{{formula fontSize="SMALL" imageType="PNG"}}
110 +R = \frac{U-U_{ocv}}{I_{stable}}
111 +{{/formula}}
110 110  
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.
111 111  
112 -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 -
114 114  The second method is used for a stepwise change in the current through the cell, while the value of the cell resistance:
115 115  
116 -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}}
117 117  
118 -(Q,,max,, is the maximum cell capacity),
121 +provided that
119 119  
120 -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}}
121 121  
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 +
122 122  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.
123 123  
124 124  To change parameters of the algorithm for calculating the cell resistance, select the "Control → Resistance estimation" section:
... ... @@ -133,7 +133,7 @@
133 133  * Minimum SOC – minimum cell SOC value for resistance calculation;
134 134  * Maximum SOC – maximum cell SOC value for resistance calculation.
135 135  
136 -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).
137 137  
138 138  === Low SOC (signal) ===
139 139  
... ... @@ -268,7 +268,6 @@
268 268  
269 269  I,,continuous,, = Maximum CONTINUOUS charge current × K,,cc,,
270 270  
271 -
272 272  === Discharge map (PEAK & CONTINUOUS) ===
273 273  
274 274  The BMS Main 3 has an alternative algorithm for the maximum allowed discharging current based on peak and continuous battery operating modes.
... ... @@ -296,6 +296,21 @@
296 296  
297 297  I,,continuous,, = Maximum CONTINUOUS discharge current × K,,dc,,
298 298  
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 +
299 299  === Charge ===
300 300  
301 301  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.