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Changes for page 3.3 Control

Last modified by Admin on 2025/04/09 12:14
From version 5.2
edited by Admin
on 2024/12/12 16:32
Change comment: Update document after refactoring.
To version 10.3
edited by Admin
on 2024/12/24 16:20
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8 8  
9 9  To change the common BMS settings, select the "Control → Common settings" section:
10 10  
11 -[[image:1733322611547-671.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
11 +[[image:1735054851946-552.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="105" width="800"]]
12 12  
13 13  In this section:
14 14  
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16 16  * Cell resistance – nominal (maximum) internal resistance of the cells, Ohm;
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 -* Number of cycles – a number of charge-discharge cycles;
20 -* Reset parameters – a command to reset cells state of charge, capacity, and resistance.
19 +* Reset parameters – a command to reset cells state of charge, capacity, and resistance;
20 +* Method of calculating the battery voltage:
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 estimated as voltage before contactors measured by BMS.
21 21  
22 22  The values “Capacity”, “Resistance”, “Cycles” are used to calculate the SOC of cells and the battery.
23 23  
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42 42  
43 43  To change the estimation algorithm for calculating the battery SOC, select the "Control → SOC estimation → Algorithm" section:
44 44  
45 -[[image:1733322611549-423.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="148" width="800"]]
46 46  
48 +[[image:1735056107942-306.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="141" width="800"]]
49 +
47 47  The following estimation algorithms supported:
48 48  
49 49  * Voltage – by open circuit voltage;
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67 67  
68 68  * Minimal SOC – the battery SOC is assumed to be the minimum SOC among the cells;
69 69  * Average SOC – the battery SOC is taken equal to the arithmetic average of the cell SOC;
70 -* 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;
71 71  
72 72  Other parameters:
73 73  
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102 102  
103 103  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
104 104  
105 -R = (U-U,,ocv,,) / I,,stable,,,
109 +{{formula fontSize="NORMAL" imageType="PNG"}}
110 +R = \frac{U-U_{ocv}}{I_{stable}}
111 +{{/formula}}
106 106  
107 -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.
108 108  
109 109  The second method is used for a stepwise change in the current through the cell, while the value of the cell resistance:
110 110  
111 111  R = (U,,2,,-U,,1,,) / (I,,stable2,,-I,,stable1,,) provided that | I,,stable2,,-I,,stable1,, | > 0.2 × Q,,max,,
112 112  
119 +
113 113  (Q,,max,, is the maximum cell capacity),
114 114  
115 115  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.
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570 570  ** Balance on charge or relaxed - balancing is performed while and after the charging and in the relaxed state (in “Charge ON”, “Charge OFF”, “Relaxed (after charging)” and “Relaxed (after discharging)” states);
571 571  ** Balance always – balancing is always performed regardless the battery state;
572 572  
573 -[[image:1733322883462-975.png]]
580 +[[image:1733322883462-975.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="74" width="600"]]
574 574  
575 575  * Minimum cell voltage to start balancing, V;
576 576  * Voltage deviation to start balancing;
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