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Changes for page 3.4 Protections

Last modified by Admin on 2025/06/11 15:57
From version 2.1
edited by Admin
on 2024/12/16 13:52
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To version 8.6
edited by Admin
on 2025/02/28 15:24
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1 -drafts.BMS Main X.3\. Configuration.WebHome
1 +Battery management systems.BMS Main X.3\. Configuration.WebHome
Content
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6 6  
7 7  The BMS Main X monitors the battery modules, compares the voltages and currents of the modules, and protects the battery system from damage.
8 8  
9 +(% class="box errormessage" %)
10 +(((
11 +**Attention!**
12 +Behavior of contactors at different errors is configured in **corresponding contactor settings**!
13 +)))
14 +
15 +=== Charging current limit ===
16 +
17 +The BMS Main X device protects the battery from charging current higher than estimated current limit.
18 +
19 +To configure parameters of the charge current limit, select the "Protections → Charge current limit" section:
20 +
21 +[[image:1740754371437-635.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="142" width="800"]]
22 +
23 +In this section:
24 +
25 +* Enable – a flag to enable the protection;
26 +* Threshold to switch from Region 1 to Region 2 – a threshold current value, dividing regions 1 and 2 with their error generation conditions, A;
27 +* Region 1: Current difference – an absolute difference of measured battery current and calculated value “Charge current limit”, at which error is generated (condition for Region 1), A;
28 +* Region 2: Current difference – a relative difference of measured battery current and calculated value “Charge current limit”, at which error is generated (conditions for Region 2), %;
29 +* Delay before setting the error, millisecond;
30 +* Delay before clearing the error, second;
31 +* Lock – a flag to block the error until the device is restarted.
32 +
33 +As a result of the operation of the charging current limit protection, the “Current limit error (CH)” is generated.
34 +
35 +Error generation conditions:
36 +
37 +* if the current is positive, less than “Threshold to switch from Region 1 to Region 2” value and exceeds “Charge current limit” by the “Region 1: Current difference” value during the “Delay before setting the error” time;
38 +* if the current is positive, more than “Threshold to switch from Region 1 to Region 2” value and exceeds “Charge current limit” by the (“Region 2: Current difference” × “Charge current limit”) / 100 value during the “Delay before setting the error” time.
39 +
40 +Error is cleared if conditions for generating an error do not apply during the “Delay before clearing the error” time.
41 +
42 +=== Discharging current limit ===
43 +
44 +The BMS Main X device protects the battery from discharging current higher than estimated current limit.
45 +
46 +To configure parameters of the charge current limit, select the "Protections → Discharge current limit " section:
47 +
48 +[[image:1740754420820-767.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="138" width="800"]]
49 +
50 +In this section:
51 +
52 +* Enable – a flag to enable the protection;
53 +* Threshold to switch from Region 1 to Region 2 – a threshold current value, dividing regions 1 and 2 with their error generation conditions, A;
54 +* Region 1: Current difference – an absolute difference of measured battery current and calculated value “Discharge current limit”, at which error is generated (condition for Region 1), A;
55 +* Region 2: Current difference – a relative difference of measured battery current and calculated value “Discharge current limit”, at which error is generated (conditions for Region 2), %;
56 +* Delay before setting the error, millisecond;
57 +* Delay before clearing the error, second;
58 +* Lock – a flag to block the error until the device is restarted.
59 +
60 +As a result of the operation of the charging current limit protection, the “Current limit error (DCH)” is generated.
61 +
62 +Error generation conditions:
63 +
64 +* if the current is negative, and the current modulus is less than “Threshold to switch from Region 1 to Region 2” value and exceeds “Discharge current limit” by the “Region 1: Current difference” value during the “Delay before setting the error” time;
65 +* if the current is negative, and the current modulus is more than “Threshold to switch from Region 1 to Region 2” value and exceeds “Discharge current limit” by the (“Region 2: Current difference” × “Discharge current limit”) / 100 value during the “Delay before setting the error” time.
66 +
67 +Error is cleared if conditions for generating an error do not apply during the “Delay before clearing the error” time.
68 +
9 9  === Battery cover ===
10 10  
11 11  The BMS Main X device detects the opening of the battery cover and performs a protective opening of the contactors.
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12 12  
13 13  Battery cover protection is configured in the "Protections - Battery cover" section:
14 14  
15 -[[image:1734356776691-451.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="66" width="600"]]
75 +[[image:1734356776691-451.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="88" width="800"]]
16 16  
17 17  In this section:
18 18  
... ... @@ -31,7 +31,7 @@
31 31  
32 32  (% class="box warningmessage" %)
33 33  (((
34 -If there is the "Battery cover" error, the **"Critical error flag" is generated and all battery contactors open.**
94 +If there is the "Battery cover" error, the **"Critical error flag" is generated.**
35 35  )))
36 36  
37 37  === Insulation ===
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40 40  
41 41  Insulation protection is configured in the "Protections - Insulation" section:
42 42  
43 -[[image:1734356776694-257.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="68" width="600"]]
103 +[[image:1740754491323-815.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="121" width="800"]]
44 44  
45 45  In this section:
46 46  
47 -* Enable – a flag to enable the protection;
48 -* Delay before setting the error;
49 -* Delay before clearing the error;
107 +* Enable – a flag to enable the protection;
108 +* Checking algorithm – isolation checking mode:
109 +** Always on – check is always performed;
110 +** On charging – check is performed only if the “Charge request” is set;
111 +** Except charging - check is performed only if the “Charge request” is cleared;
112 +* Delay before setting the error, second;
113 +* Delay before clearing the error, second;
50 50  * Lock – a flag to block the error until the device is restarted.
51 51  
52 -As a result of the operation of the insulation fault protection, the error “Insulation fault” is generated. Conditions for generating the error:
116 +The “Insulation fault” is set if the “Insulation status” signal is detected during the “Delay before setting the error” time. The “Insulation status” signal can be received through the discrete input or by the CAN bus from an insulation monitoring device. The “Insulation fault” is cleared if the “Insulation status” signal is cleared during the “Delay before clearing the error” time.
53 53  
54 -* presence of the “Insulation status” signal during the “Delay before setting the error” time.
55 -
56 -Conditions for clearing the error:
57 -
58 -* no “Insulation status” signal during the “Delay before clearing the error” time.
59 -
60 60  (% class="box warningmessage" %)
61 61  (((
62 -If there is the "Insulation fault" error, **the critical error flag is generated and all battery contactors open.**
120 +If there is the "Insulation fault" error, **the critical error flag is generated.**
63 63  )))
64 64  
65 65  === Contactor feedback ===
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68 68  
69 69  Contactor feedback protection is configured in the “Protections – Contactor feedback” section:
70 70  
71 -[[image:1734356776695-557.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="67" width="600"]]
129 +[[image:1734356776695-557.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="89" width="800"]]
72 72  
73 73  In this section:
74 74  
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87 87  
88 88  (% class="box warningmessage" %)
89 89  (((
90 -If there is the “CH contactor feedback error”, “DCH contactor feedback error”, or “CH/DCH contactor feedback error”, **the critical error flag is generated and all battery contactors open.**
148 +If there is the “CH contactor feedback error”, “DCH contactor feedback error”, or “CH/DCH contactor feedback error”, **the critical error flag is generated.**
91 91  )))
92 92  
93 93  === Module offline ===
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96 96  
97 97  Protection against loss of communication with battery modules is configured in the "Protections - Module offline" section:
98 98  
99 -[[image:1734356793441-881.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="75" width="600"]]
157 +[[image:1740754588971-137.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="118" width="800"]]
100 100  
101 101  In this section:
102 102  
103 -* Enable – a flag to enable the protection;
104 -* Delay before setting the error;
105 -* Delay before clearing the error;
106 -* Lock – a flag to block the error until the device is restarted.
161 +* Enable – a flag to enable the protection;
162 +* Number of offline modules to set the error;
163 +* Delay before setting the error, second;
164 +* Delay before clearing the error, second;
165 +* Lock – lock the error until the device is reset.
107 107  
108 -As a result of the protection against loss of communication with the battery module, the “Module offline” error is generated. Conditions for generating the error:
167 +As a result of the protection from loss of communication with battery modules, the "Module offline" error is generated.
109 109  
110 -* at least one of the battery modules does not respond to commands within the "Delay before setting the error" time.
169 +Error generation conditions:
111 111  
112 -Conditions for clearing the error:
171 +* more than “Number of offline modules to set the error” battery modules do not respond to the commands of the BMS Main 3X device within “Delay before setting the error” time.
113 113  
114 -* all battery modules respond to commands within the "Delay before clearing the error" time.
173 +Conditions for removing the error:
115 115  
175 +* less than “Number of offline modules to set the error” battery modules do not respond to the commands of the BMS Main 3X device within “Delay before clearing the error” time.
176 +
116 116  (% class="box warningmessage" %)
117 117  (((
118 -If there is the "Module offline" error, **the critical error flag is generated and all battery contactors open.**
179 +If there is the "Module offline" error, **“Critical error” is generated.**
119 119  )))
120 120  
121 -=== Voltage unbalance ===
182 +=== Voltage unbalance (in any state) ===
122 122  
123 123  Before closing the contactors for charging and discharging battery modules, the BMS Main X device detects those modules whose voltage is significantly different from the rest. For unbalanced modules, errors "Voltage unbalance (CH)" (charge circuit) and "Voltage unbalance (DCH)" (discharge circuit) are generated.
124 124  
125 -Protection against voltage unbalance of battery modules is configured in the section "Protections - Voltage unbalance":
186 +Protection against voltage unbalance of battery modules is configured in the section "Protections - Voltage unbalance (in any state)":
126 126  
127 -[[image:1734356793449-249.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="75" width="600"]]
188 +[[image:1740754732291-420.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="127" width="800"]]
128 128  
129 129  In this section:
130 130  
131 131  * Enable – a flag to enable the protection;
132 132  * Delta voltage – maximum allowable voltage difference of battery modules, V;
194 +* Use the open circuit voltage to detect the error – a flag to enable U,,ocv,, correction;
133 133  * Delay before setting the error;
134 134  * Delay before clearing the error;
197 +* Set the 'Voltage unbalance' error for the modules that are not ready to charge/discharge;
135 135  * Lock – a flag to block the error until the device is restarted.
136 136  
137 -As a result of the operation of the voltage unbalance protection the errors “Voltage unbalance (CH)” and “Voltage unbalance (DCH)” are generated. Conditions for generating the error:
200 +As a result of the operation of the voltage unbalance protection the errors “Voltage unbalance (CH)” and “Voltage unbalance (DCH)” are generated.
138 138  
139 -* battery module is not included in the largest group of modules whose voltages differ from each other by no more than "Delta voltage" during the "Delay before setting the error" time.
202 +Conditions for generating the error:
140 140  
204 +* battery module is not included in the largest group of modules whose voltages differ from each other by no more than "Delta voltage" during the "Delay before setting the error" time;
205 +* module is not ready to charge or discharge;
206 +
141 141  Conditions for clearing the error:
142 142  
143 -* battery module is in the largest group of balanced modules during the "Delay before clearing the error" time.
209 +* battery module is in the largest group of balanced modules during the "Delay before clearing the error" time;
210 +* module is ready to charge or discharge.
144 144  
145 -If there is the error "Voltage unbalance (CH)" ("Voltage unbalance (DCH)"), the charging (discharging) contactor of the battery module opens.
212 +=== Current unbalance (in “Balancing” state) ===
146 146  
147 -=== Current unbalance ===
148 -
149 149  When battery modules are connected in parallel, the most charged modules transfer charge to the least charged modules. The process of charge transfer is accompanied by the flow of balancing currents. The BMS Main X device detects modules with high balancing currents and generates “Current unbalance (CH)” (charge circuit) and “Current unbalance (DCH)” (discharge circuit) errors for them.
150 150  
151 151  Protection against current unbalance of battery modules is configured in the section "Protections - Current unbalance":
152 152  
153 -[[image:1734356793451-440.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="77" width="600"]]
218 +[[image:Battery management systems.BMS Main 3X.3\. Configuration.3\.4 Protections.WebHome@1734090244843-403.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="116" width="800"]]
154 154  
155 155  In this section:
156 156  
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158 158  * Maximum current – a maximum allowable self-balancing current of battery modules, A;
159 159  * Delay before setting the error;
160 160  * Delay before clearing the error;
226 +* Check all the time (not only in the ‘Balancing’ state) – a flag to enable voltage check not only in “Balancing” state;
161 161  * Lock – a flag to block the error until the device is restarted.
162 162  
163 163  As a result of the operation of the current unbalance protection the errors “Current unbalance (CH)” and “Current unbalance (DCH)” are generated. Conditions for generating the error:
164 164  
165 -* current of the battery module is greater than the "Maximum current" value during the "Delay before setting the error" time.
231 +* the current of the battery module is greater than the "Maximum current" value during the "Delay before setting the error" time.
166 166  
167 167  Conditions for clearing the error:
168 168  
169 -* current of the battery module is less than the "Maximum current" value during the "Delay before clearing the error" time.
235 +* the current of the battery module is less than the "Maximum current" value during the "Delay before clearing the error" time.
170 170  
171 -If there is the error "Current unbalance (CH)" ("Current unbalance (DCH)"), the charging (discharging) contactor of the battery module opens.
237 +(% class="box infomessage" %)
238 +(((
239 +If there is the “Current unbalance (CH)” or "Current unbalance (DCH)" error, **corresponding battery module opens its charging or discharging contactor**.
240 +)))
172 172  
173 -=== Charging current unbalance ===
242 +=== Charging current unbalance (in “Charging” state) ===
174 174  
175 175  During battery charging, the currents of the battery modules may vary. The BMS Main X device detects modules whose charging currents are significantly different from the currents of other modules and generates the “Charging current unbalance” errors for them.
176 176  
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194 194  
195 195  * battery module is included in the largest group of modules with similar charge currents during the “Delay before clearing the error” time.
196 196  
197 -If there is the “Charging current unbalance” error, the battery module charging contactor opens.
266 +(% class="box infomessage" %)
267 +(((
268 +If there is the “Charging current unbalance” error, **corresponding battery module opens its charging contactor**.
269 +)))
198 198  
199 199  === Discharging current unbalance ===
200 200  
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220 220  
221 221  * battery module is included in the largest group of modules with similar discharge currents during the “Delay before clearing the error” time.
222 222  
223 -If there is the “Discharging current unbalance” error, the battery module discharging contactor opens.
295 +(% class="box infomessage" %)
296 +(((
297 +If there is the “Discharging current unbalance” error, **corresponding battery module opens its discharging contactor**.
298 +)))
224 224  
300 +=== High contactor tempe ===
301 +
302 +=== WDT reset ===
303 +
304 +If the BMS firmware hangs, the watchdog timer resets the device. The BMS can detect that the device was reset and generates the “WDT reset” error.
305 +
306 +To change the parameters of the watchdog protection, select the "Protections → WDT reset" section:
307 +
225 225  === Critical error ===
226 226  
227 227  Parameters for generating the critical error are configured in the "Protections - Critical error" section:
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