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Changes for page 3.5 Battery control

Last modified by Admin on 2025/07/07 11:46
From version 34.2
edited by Admin
on 2025/07/07 11:43
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To version 13.1
edited by Admin
on 2025/01/11 19:07
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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 -=== Charging control ===
7 +=== Charge 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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46 46  
47 47  To change the parameters of the battery charge control algorithm, select the menu "Cells → Charging control":
48 48  
49 -[[image:1751888542152-699.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="741" width="450"]]
49 +[[image:1732208589628-419.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="725" width="471"]]
50 50  
51 51  In this section:
52 52  
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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;
59 59  * Current indicating charging – a current level to generate the "Charging current present" signal, A;
60 60  * Current indicating no charging – a current level to clear the "Charging current present" signal, A;
61 61  * Delay before starting charging – a time delay T,,on,, before closing the charging relay and the allow charging relay, second;
... ... @@ -62,12 +62,10 @@
62 62  * Delay before stopping charging – a time delay T,,off,, before opening the charging relay, second;
63 63  * Use specific delays before stopping charging (on errors) – a flag to enable manual settings of time delays T,,off,, for specific errors;
64 64  * Switch off the charging relay on errors without delay – a flag to protectively open the charging relay without delay. In the opposite case, when an error is detected, the charging relay opens always with the delay “Delay before stopping charging”;
65 -* Control the precharging relay – a flag to enable control of the precharging relay at charge;
66 -* Finish precharge if the battery current is negative – a flag to finish precharge if there is a
67 -* Voltage to clear the “Ready to charge” (hence, the “Allow charging”) 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 above this level, the “Ready to charge” signal is cleared;
68 -* Voltage to reset the “Ready to charge” (hence, the “Allow charging”) signal – a tolerant U,,ocv,, (corrected due to current and cell resistance) voltage level on the cell, V; if all cell voltages are below the tolerant level, the “Ready to charge” signal is set;
69 -* Delay before recharging – a time after which the previously opened the allow charging relay closes again, minute; to disable the operation by timeout set "Delay before recharging" to 0;
70 -* 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.
64 +* Control the precharging relay – a flag that allows control of the precharging relay;
65 +* Voltage to clear the “Ready to charge” (hence, the “Allow charging”) signal – a threshold voltage level on the cell, V; if the voltage of any cell is above this level, the “Ready to charge” signal is cleared;
66 +* Voltage to reset the “Ready to charge” (hence, the “Allow charging”) signal – a tolerant voltage level on the cell, V; if all cell voltages are below the tolerant level, the “Ready to charge” signal is set;
67 +* Delay before recharging – a time after which the previously opened the allow charging relay closes again, minute; to disable the operation by timeout set "Delay before recharging" to 0.
71 71  
72 72  (% class="box infomessage" %)
73 73  (((
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76 76  2) the "Delay before recharging" time has passed since the opening of the allow charging relay.
77 77  )))
78 78  
79 -=== Discharging control ===
76 +=== Discharge control ===
80 80  
81 81  The board has a discharging relay to connect battery to the load.
82 82  
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113 113  **Note:** In case of errors in the system operation, the opening of the discharging relay is performed either immediately or with a delay T,,off,, (depends on the settings described below).
114 114  )))
115 115  
116 -The board supports controlling the precharging relay. The duration of switching on the precharging relay and precharge current threshold before closing the discharging (load) relay are adjustable.
113 +The board supports controlling the precharging relay. The duration of switching on the precharging relay before closing the discharging (load) relay is adjusted.
117 117  
118 118  When the power down request occurs, the discharging relay opens after delay T,,off,,. Reclosing the discharging relay is performed if the power down request is removed.
119 119  
120 120  To change the parameters of the battery discharge control algorithm, select the menu "Cells → Discharging control":
121 121  
122 -[[image:1749654838818-400.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="828" width="446"]]
119 +[[image:1732208781932-849.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="644" width="415"]]
123 123  
124 124  In this section:
125 125  
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128 128  ** Always on – load is always connected;
129 129  ** On charger disconnected – load is connected when there is no signal “Charger connected”;
130 130  ** On discharge request – load is connected when there is a signal “Discharge request”;
131 -* Allow discharging only when the "Ready to discharge" signal is set;
132 132  * Current indicating discharging – a current level to generate the "Discharging current present" signal, А;
133 133  * Current indicating no discharging – a current level to clear the "Discharging current present" signal, А;
134 134  * Delay before starting discharging – a time delay T,,on,, before closing the discharging relay, second;
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135 135  * Delay before stopping discharging – a time delay T,,off,, before opening the discharging relay, second;
136 136  * Use specific delays before stopping discharging (on errors) – a flag to enable manual settings of time delays T,,off,, for specific errors;
137 137  * 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”.
138 -* Control the precharging relay – a flag to enable precharge at discharging;
139 -* Delay before current measurement – a delay before first current measurement after closing precharge, millisecond;
140 140  * Precharge time – a duration of closing the precharge relay before closing the discharging relay, millisecond;
141 141  * Precharge current threshold to start discharging – a minimum current value to finish precharging and start discharge, A;
142 -* Keep the precharging relay closed until precharge is finished – a flag to ignore the Precharge time and wait precharging to finish before open precharge relay;
143 -* Delay before clearing the "Precharge error", second;
144 -* Lock the "Precharge error" until the device is reset;
145 -* 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;
146 -* 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;
147 -* Treat positive currents as zero currents for generating the "Ready to discharge" signal – a flag to disable voltage correction for "Ready to discharge" signal at charging current.
136 +* Voltage to clear the “Ready to discharge” signal – a threshold 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 voltage level on the cell, V; if all cells voltages are above the tolerant level, the “Ready to discharge” signal is set.
148 148  
149 149  === Discharging (AUX) control ===
150 150  
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178 178  
179 179  === Charging/Discharging control ===
180 180  
181 - 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.
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.
182 182  
183 183  To change the parameters of the charging/discharging algorithm, select the menu "Cells → Charging/Discharging control":
184 184  
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192 192  
193 193  The BMS Main 2.x has a relay to control the main contactor. The main contactor is usually placed in the common (minus) battery line for opening the charge and discharge circuits in a case of sealing of the charging or discharging contactor.
194 194  
195 -The Main contactor algorithm supports the following modes:
185 +The main contactor closes if there are no errors from the list below:
196 196  
197 -* Always on;
198 -* Automatic;
199 -* On demand.
187 +* Overcurrent;
188 +* Undervoltage;
189 +* Overvoltage;
190 +* High temperature (charging);
191 +* High temperature (discharging);
192 +* Unallowable charging;
193 +* Critical error.
200 200  
201 -In “Always on” mode main contactor closes if all the following is true:
195 +The main contactor opens if the charging and discharging relays are opened and any of the following conditions is met:
202 202  
203 -* Other contactors are open;
204 -* There are no errors from the list below:
205 -** Overcurrent;
206 -** Undervoltage;
207 -** Overvoltage;
208 -** High temperature (charging);
209 -** High temperature (discharging);
210 -** Unallowable charging;
211 -** Critical error.
197 +* charging or discharging current is detected during a set time;
198 +* voltage of any cell is lower than the minimum cell voltage configured in the section "Protections → Undervoltage protection" during a set time;
199 +* voltage of any cell is greater than the maximum cell voltage configured in the section "Protections → Overvoltage protection" during a set time;
200 +* temperature of any cell is greater than the maximum cell temperature configured in the section "Protections → High temperature protection" during a set time;
201 +* Critical error stays on during a set time.
212 212  
213 -In “Always on” mode main contactor opens if all the following is true:
214 -
215 -* Other contactors are open;
216 -* There is an error from the the list above.
217 -
218 -In “Automatic” mode, the main contactor closes and opens by internal algorithms at the same time with other contactors.
219 -
220 -In “On demand” mode, the main contactor closes by external the “Close Main contactor” request.
221 -
222 222  To change the parameters of the main contactor, select the menu "Cells → Main contactor":
223 223  
224 -[[image:1739958553206-813.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="179" width="410"]]
205 +[[image:1732209137414-912.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="132" width="352"]]
225 225  
226 226  In this section:
227 227  
228 228  * Enable – a flag to enable the main contactor control;
229 -* Algorithm – main contactor control algorithm:
230 -** Always on – contactor is always closed;
231 -** Automatic – contactor closes by internal charge and discharge algorithms;
232 -** On demand – contactor is closed by an external request;
233 233  * Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, second;
234 234  * Keep the contactor open until the device is reset – a flag for keeping the main contactor opened until the system be reset.
235 235  
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