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Changes for page 3.5 Battery control

Last modified by Admin on 2025/06/11 15:20
From version 23.1
edited by Admin
on 2025/02/19 10:42
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To version 26.4
edited by Admin
on 2025/06/11 15:18
Change comment: There is no comment for this version

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4 4  (% data-numbered-headings-start="5" style="--numbered-headings-start: 4;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
5 5  == Battery control ==
6 6  
7 -=== Charge control ===
7 +=== Charging control ===
8 8  
9 9  There are two relays that serve charging the battery: a charging relay and an allow charging relay. With the help of the allow charging relay, the BMS commands the charger to start or stop charging.
10 10  
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55 55  ** Always on – charging is always allowed;
56 56  ** On charger connected – charging is allowed when there is a signal “Charger connected”;
57 57  ** On charge request – charging is allowed when there is a signal “Charge request”;
58 +* Allow charging only when the "Ready to charge" signal is set;
58 58  * Current indicating charging – a current level to generate the "Charging current present" signal, A;
59 59  * Current indicating no charging – a current level to clear the "Charging current present" signal, A;
60 60  * Delay before starting charging – a time delay T,,on,, before closing the charging relay and the allow charging relay, second;
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73 73  2) the "Delay before recharging" time has passed since the opening of the allow charging relay.
74 74  )))
75 75  
76 -=== Discharge control ===
77 +=== Discharging control ===
77 77  
78 78  The board has a discharging relay to connect battery to the load.
79 79  
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116 116  
117 117  To change the parameters of the battery discharge control algorithm, select the menu "Cells → Discharging control":
118 118  
119 -[[image:1739961703149-845.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="748" width="440"]]
120 +[[image:1749654838818-400.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="828" width="446"]]
120 120  
121 121  In this section:
122 122  
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125 125  ** Always on – load is always connected;
126 126  ** On charger disconnected – load is connected when there is no signal “Charger connected”;
127 127  ** On discharge request – load is connected when there is a signal “Discharge request”;
129 +* Allow discharging only when the "Ready to discharge" signal is set;
128 128  * Current indicating discharging – a current level to generate the "Discharging current present" signal, А;
129 129  * Current indicating no discharging – a current level to clear the "Discharging current present" signal, А;
130 130  * Delay before starting discharging – a time delay T,,on,, before closing the discharging relay, second;
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131 131  * Delay before stopping discharging – a time delay T,,off,, before opening the discharging relay, second;
132 132  * Use specific delays before stopping discharging (on errors) – a flag to enable manual settings of time delays T,,off,, for specific errors;
133 133  * Switch off the discharging relay on errors without delay – a flag to protectively open the discharging relay without delay. In the opposite case, when an error is detected, the discharging relay opens always with the delay “Delay before stopping discharging”.
136 +* Control the precharging relay – a flag to enable precharge at discharging;
137 +* Delay before current measurement, millisecond;
134 134  * Precharge time – a duration of closing the precharge relay before closing the discharging relay, millisecond;
135 135  * Precharge current threshold to start discharging – a minimum current value to finish precharging and start discharge, A;
140 +* Keep the precharging relay closed until precharge is finished
136 136  * Voltage to clear the “Ready to discharge” signal – a threshold U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if the voltage of any cell is below this level, the “Ready to discharge” signal is cleared;
137 -* Voltage to reset the “Ready to discharge” signal – a tolerant U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if all cells voltages are above the tolerant level, the “Ready to discharge” signal is set.
142 +* Voltage to reset the “Ready to discharge” signal – a tolerant U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if all cells voltages are above the tolerant level, the “Ready to discharge” signal is set;
143 +* Treat negative currents as zero currents for generating the "Ready to charge" signal – a flag to disable voltage correction for "Ready to charge" signal at discharging current;
138 138  
139 139  === Discharging (AUX) control ===
140 140  
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168 168  
169 169  === Charging/Discharging control ===
170 170  
171 - BMS Main 2.x allows to control charging/discharging contactor that combines algorithms of charging and discharging contactor. It behaves as charging contactor when «Charge request» or «Charger connected» are set, otherwise – as discharging contactor.
177 + BMS Main 2.x allows to control charging/discharging contactor that combines algorithms of charging and discharging contactor. It behaves as [[charging>>doc:||anchor="HChargingcontrol"]] contactor when «Charge request» or «Charger connected» are set, otherwise – as [[discharging>>doc:||anchor="HDischargingcontrol"]] contactor.
172 172  
173 173  To change the parameters of the charging/discharging algorithm, select the menu "Cells → Charging/Discharging control":
174 174  
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