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Changes for page 3.3 Control

Last modified by Admin on 2025/04/09 12:14
From version 9.5
edited by Admin
on 2024/12/24 16:09
Change comment: There is no comment for this version
To version 10.6
edited by Admin
on 2024/12/24 16:25
Change comment: There is no comment for this version

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... ... @@ -70,8 +70,8 @@
70 70  
71 71  * Minimal SOC – the battery SOC is assumed to be the minimum SOC among the cells;
72 72  * Average SOC – the battery SOC is taken equal to the arithmetic average of the cell SOC;
73 -* Min-Max SOC – the battery SOC is calculated based on the minimum and maximum SOC of the cells. Final SOC will be assumed as 0% 100% if any cell have 100% SOC
74 -* Max-Min SOC – the battery SOC is calculated based on the minimum and maximum SOC of the cells.
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;
75 75  
76 76  Other parameters:
77 77  
... ... @@ -106,18 +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  
111 -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.
112 112  
113 113  The second method is used for a stepwise change in the current through the cell, while the value of the cell resistance:
114 114  
115 -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}}
116 116  
117 -(Q,,max,, is the maximum cell capacity),
121 +provided that
118 118  
119 -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}}
120 120  
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 +
121 121  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.
122 122  
123 123  To change parameters of the algorithm for calculating the cell resistance, select the "Control → Resistance estimation" section: