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Changes for page 3.4 Battery parameters

Last modified by Admin on 2025/04/09 12:04
From version 7.2
edited by Admin
on 2024/11/21 16:47
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To version 8.2
edited by Admin
on 2024/11/21 16:48
Change comment: There is no comment for this version

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162 162  * Coulomb threshold – the difference of the charges Qthr, given by a series of cells, above which balancing to be started, Ah;
163 163  * Period – period to reset of charge counters for each series (to avoid accumulation of error), second.
164 164  
165 -== ==
165 +== 3.4.6 Cell analysis ==
166 166  
167 -== ==
167 +Discharge characteristics of the battery – the dependence Uocv = Uocv (DOD) – is used to determine the tabular dependence Uocv = Uocv (SOC, t °C) (see section Calculating the state of charge (SOC)), which is necessary for calculating the state of charge of the battery.
168 168  
169 +The BMS Main 2.x board can automatically determine the battery discharge characteristic.
170 +
171 +Before starting the process of determining the discharge characteristic, it is necessary to prepare a BMS:
172 +
173 +1. Charge the battery.
174 +1. Connect a contactor to the discharging relay which switches the resistive load to the battery.
175 +1. Connect a resistive load to the contactor, which will provide a discharge current of 0.5C (where C is the cell capacitance).
176 +
177 +To configure parameters for determining the discharge characteristic of the battery, select the menu "Cells → Cell analysis":
178 +
179 +[[Cell analysis section>>image:1732207696322-587.png||data-xwiki-image-style-alignment="center" height="213" width="258"]]
180 +
169 169  == SOC correction ==
170 170  
171 171  The BMS Main 2.x board can recalculate the battery SOC after long-term storage or after long-term working in the case when the battery was not charged fully or discharged totally. Recalculation is done based on the tabular dependency Uocv = Uocv (SOC, t) (see section Calculating the state of charge (SOC)).
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