Changes for page 3.4 Battery parameters

Last modified by Admin on 2025/04/09 12:04

From version 33.1
edited by Admin
on 2025/02/20 11:12
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To version 31.2
edited by Admin
on 2025/02/20 11:09
Change comment: There is no comment for this version

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... ... @@ -73,25 +73,19 @@
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}}
76 +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}}
82 +R = (U,,2,,-U,,1,,) / (I,,stable2,,-I,,stable1,,)
87 87  
88 -provided that
84 +provided that | I,,stable2,,-I,,stable1,, | > 0.2 × Q,,max,,
89 89  
90 -{{formula fontSize="SMALL"}}
91 -| I_{stable2}-I_{stable1} | > 0.2 × Q_{max}
92 -{{/formula}}
86 +(Q,,max,, is the maximum cell capacity),
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.
88 +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.
95 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