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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 26.2
edited by Admin
on 2025/06/11 15:15
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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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;
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.
139 +* 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;
140 +* Treat negative currents as zero currents for generating the "Read y to charge" signal – a flag to disable voltage correction
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.
174 + 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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