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Changes for page 3.4 Battery parameters

Last modified by Admin on 2025/04/09 12:04
From version 32.1
edited by Admin
on 2025/02/20 11:11
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To version 29.1
edited by Admin
on 2025/02/17 17:28
Change comment: There is no comment for this version

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... ... @@ -48,8 +48,6 @@
48 48  * Final SOC – a method of calculating the battery SOC:
49 49  ** Minimum cell SOC – the battery SOC is assumed to be equal to the minimum SOC of cells;
50 50  ** Average cell SOC – the battery SOC is assumed to be equal to the average SOC of cells;
51 -** 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 has 100% SOC, b) 0% if any cell has 0% SOC;
52 -** 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;
53 53  * Scale the final SOC – flag to scale the battery SOC by the following values;
54 54  * Internal SOC corresponding to 0% – battery SOC that sets to be 0%;
55 55  * Internal SOC corresponding to 100% – battery SOC that sets to be 100%.
... ... @@ -73,26 +73,18 @@
73 73  
74 74  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
75 75  
76 -{{formula fontSize="SMALL" imageType="PNG"}}
77 -R = \frac{U-U_{ocv}}{I_{stable}}
78 -{{/formula}}
74 +R = (U-Uocv) / Istable,
79 79  
80 80  where U is the cell voltage measured in the charge or discharge state, V; Uocv is the cell voltage measured in the state of relaxation (before switching to the state of charge or discharge); Istable – stabilized current through the cell in the state of charge or discharge.
81 81  
82 82  The second method is used for a stepwise change in the current through the cell, while the value of the cell resistance:
83 83  
84 -{{formula fontSize="SMALL"}}
85 -R = \frac{U_2-U_1}{I_{stable2}-I_{stable1}}
86 -{{/formula}}
80 +R = (U,,2,,-U,,1,,) / (I,,stable2,,-I,,stable1,,) provided that | I,,stable2,,-I,,stable1,, | > 0.2 × Q,,max,,
87 87  
88 -provided that
82 +(Q,,max,, is the maximum cell capacity),
89 89  
90 -{{formula fontSize="SMALL"}}
91 -| I_{stable2}-I_{stable1} | > 0.2 × Qmax
92 -{{/formula}}
84 +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.
93 93  
94 -where Q,,max,, is the maximum cell capacity; 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.
95 -
96 96  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.
97 97  
98 98  To change parameters of the algorithm for calculating the cell resistance, select the menu "Cells → Cell resistance estimation":
... ... @@ -144,7 +144,7 @@
144 144  
145 145  To change the cell balancing parameters, select the menu "Cell → Cell balancing":
146 146  
147 -[[image:1739812799920-892.png||alt="1732207485773-804.png" data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="264" width="387"]]
137 +[[image:1732207485773-804.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="264" width="387"]]
148 148  
149 149  In this section:
150 150  
... ... @@ -156,13 +156,8 @@
156 156  ** Charging;
157 157  ** Charging or relaxed;
158 158  ** Always (regardless of battery state);
159 -* Balancing condition:
160 -** Automatic – balancing will be performed automatically if needed conditions are met;
161 -** On balancing request – balancing will start only if a remote request is received. In this case cells will start to balance regardless the "Voltage deviation to start balancing" value;
162 162  * Minimum cell voltage to start balancing, V;
163 -* Deviation to start balancing;
164 -* Deviation to stop balancing;
165 -* Voltage for forced balancing – if cell voltage is above this value, it will start discharging through balancing resistor;
150 +* Balancing threshold, V;
166 166  * Start cell discharging – a command to start forced balancing of all battery cells (used for service purposes);
167 167  * Stop cell discharging – a command to stop forced balancing of all battery cells (used for service purposes).
168 168