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Changes for page 3.5 Battery control

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1 -drafts.bms-main-2-1.configuration.WebHome
1 +Battery management systems.BMS Main 2\.1.3\. Configuration.WebHome
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1 -== 3.5.1 Charge control ==
1 +(% data-numbered-headings-start="3" style="--numbered-headings-start: 2;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
2 += Configuration =
2 2  
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 +== Battery control ==
6 +
7 +=== Charging control ===
8 +
3 3  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.
4 4  
5 5  The board supports two charge control algorithms:
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40 40  
41 41  To change the parameters of the battery charge control algorithm, select the menu "Cells → Charging control":
42 42  
43 -[[Charge control settings>>image:1732208589628-419.png||data-xwiki-image-style-alignment="center" height="725" width="471"]]
49 +[[image:1739961593607-309.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="639" width="425"]]
44 44  
45 45  In this section:
46 46  
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49 49  ** Always on – charging is always allowed;
50 50  ** On charger connected – charging is allowed when there is a signal “Charger connected”;
51 51  ** 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;
52 52  * Current indicating charging – a current level to generate the "Charging current present" signal, A;
53 53  * Current indicating no charging – a current level to clear the "Charging current present" signal, A;
54 54  * Delay before starting charging – a time delay T,,on,, before closing the charging relay and the allow charging relay, second;
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56 56  * Use specific delays before stopping charging (on errors) – a flag to enable manual settings of time delays T,,off,, for specific errors;
57 57  * 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”;
58 58  * Control the precharging relay – a flag that allows control of the precharging relay;
59 -* 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;
60 -* 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;
66 +* 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;
67 +* 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;
61 61  * 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.
62 62  
63 63  (% class="box infomessage" %)
64 64  (((
65 -**Note:** The allow charging relay closes under two independent conditions:
72 +**Note:** The "Allow charging" signal appears under two independent conditions:
66 66  1) the voltage on the cells reaches the Voltage to reset the “Ready to charge" level and
67 67  2) the "Delay before recharging" time has passed since the opening of the allow charging relay.
68 68  )))
69 69  
70 -== 3.5.2 Discharge control ==
77 +=== Discharging control ===
71 71  
72 72  The board has a discharging relay to connect battery to the load.
73 73  
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104 104  **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).
105 105  )))
106 106  
107 -The board supports controlling the precharging relay. The duration of switching on the precharging relay before closing the discharging (load) relay is adjusted.
114 +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.
108 108  
109 109  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.
110 110  
111 111  To change the parameters of the battery discharge control algorithm, select the menu "Cells → Discharging control":
112 112  
113 -[[Discharge control settings>>image:1732208781932-849.png||data-xwiki-image-style-alignment="center" height="644" width="415"]]
120 +[[image:1739961703149-845.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="748" width="440"]]
114 114  
115 -
116 116  In this section:
117 117  
118 118  * Enable – a flag to activate the discharge control;
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120 120  ** Always on – load is always connected;
121 121  ** On charger disconnected – load is connected when there is no signal “Charger connected”;
122 122  ** 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;
123 123  * Current indicating discharging – a current level to generate the "Discharging current present" signal, А;
124 124  * Current indicating no discharging – a current level to clear the "Discharging current present" signal, А;
125 125  * Delay before starting discharging – a time delay T,,on,, before closing the discharging relay, second;
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127 127  * Use specific delays before stopping discharging (on errors) – a flag to enable manual settings of time delays T,,off,, for specific errors;
128 128  * 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”.
129 129  * Precharge time – a duration of closing the precharge relay before closing the discharging relay, millisecond;
130 -* 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 +* Precharge current threshold to start discharging – a minimum current value to finish precharging and start discharge, A;
138 +* 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;
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.
131 131  
132 -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;
141 +=== Discharging (AUX) control ===
142 +
143 +The BMS Main 2.x board can control the power supply of external equipment using the auxiliary (AUX) discharging relay. An example of external equipment can be an inverter that converts DC to AC to power a service laptop and other devices.
144 +
145 +The power supply circuit of the external equipment using the auxiliary (AUX) discharging relay is independent of the battery load circuit. The closing and opening of the auxiliary (AUX) discharging relay is performed according to its program.
146 +
147 +If the power supply function of the external equipment is enabled, the auxiliary (AUX) discharging relay closes. The opening of this relay occurs on three independent conditions:
148 +
149 +* the battery has low SOC;
150 +* the battery voltage is out of range;
151 +* the battery system errors are detected.
152 +
153 +To change the parameters of the powering of external equipment, select the menu "Cells → Discharging (AUX) control":
154 +
155 +[[image:1732208939544-710.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="397" width="445"]]
156 +
157 +In this section:
158 +
159 +* Enable – a flag to activate the auxiliary discharge control;
160 +* Switch off the discharging (AUX) relay at when the battery SOC is low:
161 +** Minimum SOC – a minimum SOC value, when reached, the auxiliary (AUX) discharging relay opens, %;
162 +** Tolerant SOC – a permissive SOC value, upon reaching which the auxiliary (AUX) discharging relay re-closes, %;
163 +* Switch off the discharging (AUX) relay when the cell voltage is low:
164 +** Minimum cell voltage – a minimum cell voltage, when reached, the auxiliary (AUX) discharging relay opens, %;
165 +** Tolerant cell voltage – a permissive cell voltage, upon reaching which the auxiliary (AUX) discharging relay re-closes, %;
166 +* Switch off the discharging (AUX) relay if the battery voltage is out of the range:
167 +** Minimum battery voltage – minimum battery voltage, V;
168 +** Maximum battery voltage – maximum battery voltage, V;
169 +* Switch off the discharging (AUX) relay on errors – the auxiliary (AUX) discharging relay opens if the following errors occur: Undervoltage, Overcurrent, High temperature (discharging), Short circuit, Critical error.
170 +
171 +=== Charging/Discharging control ===
172 +
173 + 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.
174 +
175 +To change the parameters of the charging/discharging algorithm, select the menu "Cells → Charging/Discharging control":
176 +
177 +[[image:1732209044117-558.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="102" width="259"]]
178 +
179 +In this section:
180 +
181 +* Enable – a flag to enable Charging/Discharging contactor controller.
182 +
183 +=== Main contactor ===
184 +
185 +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.
186 +
187 +The Main contactor algorithm supports the following modes:
188 +
189 +* Always on;
190 +* Automatic;
191 +* On demand.
192 +
193 +In “Always on” mode main contactor closes if all the following is true:
194 +
195 +* Other contactors are open;
196 +* There are no errors from the list below:
197 +** Overcurrent;
198 +** Undervoltage;
199 +** Overvoltage;
200 +** High temperature (charging);
201 +** High temperature (discharging);
202 +** Unallowable charging;
203 +** Critical error.
204 +
205 +In “Always on” mode main contactor opens if all the following is true:
206 +
207 +* Other contactors are open;
208 +* There is an error from the the list above.
209 +
210 +In “Automatic” mode, the main contactor closes and opens by internal algorithms at the same time with other contactors.
211 +
212 +In “On demand” mode, the main contactor closes by external the “Close Main contactor” request.
213 +
214 +To change the parameters of the main contactor, select the menu "Cells → Main contactor":
215 +
216 +[[image:1739958553206-813.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="179" width="410"]]
217 +
218 +In this section:
219 +
220 +* Enable – a flag to enable the main contactor control;
221 +* Algorithm – main contactor control algorithm:
222 +** Always on – contactor is always closed;
223 +** Automatic – contactor closes by internal charge and discharge algorithms;
224 +** On demand – contactor is closed by an external request;
225 +* Delay before opening the contactor – a time which is used to detect conditions for opening the contactor, second;
226 +* Keep the contactor open until the device is reset – a flag for keeping the main contactor opened until the system be reset.
227 +
228 +=== Power down control ===
229 +
230 +The BMS Main 2.x can command the BMS Power Control board to shut down the battery system if the battery voltage is low or the battery is idle for a long time. The BMS Main 2.x interacts with the BMS Power Control using the “Power down request” and the “Acknowledgement of power down” discrete signals.
231 +
232 +Shutting down the battery system is performed according to the following conditions:
233 +
234 +* the battery voltage is below the minimum level;
235 +* the “Charger connected” signal is cleared for 60 seconds.
236 +
237 +The BMS Main 2.x also shuts down the battery if it stays in the “Charging OFF”, “Discharging OFF”, “Relaxed (after charging)” or “Relaxed (after discharging)” for the set time.
238 +
239 +To change the parameters of the power down control, select the menu "Cells → Power down control":
240 +
241 +[[image:1732211675123-235.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="198" width="402"]]
242 +
243 +In this section:
244 +
245 +* Enable – a flag to enable the power down control;
246 +* Minimum voltage – a minimum voltage level of the battery below which the BMS commands to shut down the battery, V;
247 +* Idle time – a time of battery inactivity after which the battery is shut down, second;
248 +* Wait the "Power up/down request" signal is cleared (on startup) – a flag to enable delay for clearing the “Power up/down request” signal while starting the BMS.
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