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Wiki source code of 3.6 Battery protection

Version 4.13 by Admin on 2024/11/21 18:17
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1 The BMS Main 2.x board continuously monitors the state of the cells, BMS Logic boards, the external environment and, when detecting abnormalities, protects the battery and system components from damage.
2
3 == 3.6.1 Overcurrent protection ==
4
5 To change the current protection of the battery, select the menu "Protections → Overcurrent protection":
6
7 [[Overcurrent protection settings>>image:1732211959984-118.png||data-xwiki-image-style-alignment="center" height="266" width="386"]]
8
9 In this section:
10
11 * Enable – a flag to enable the protection;
12 * Maximum charging current, А;
13 * Tolerant charging current, А;
14 * Maximum discharging current, А;
15 * Tolerant discharging current, А;
16 * Delay before setting the error, second;
17 * Delay before clearing the error, second;
18 * Lock the error until the device is reset – a flag to block the error until the board is restarted.
19
20 As a result of operation of the current protection, the "Overcurrent" error is generated.
21
22 Error generation conditions:
23
24 * the current is positive (charging), and its modulo value is greater than the “Maximum charging current” value for the “Delay before setting the error” time;
25 * the current is negative (discharging), and its modulo value is greater than the “Maximum discharging current” value for the “Delay before setting the error” time.
26
27 Conditions for removing the error:
28
29 * the current is positive (charging) or zero, and its modulo value is less than the “Tolerant charging current” value for the “Delay before clearing the error” time;
30 * the current is negative (discharging), and its modulo value is less than the “Tolerant discharging current” value for the “Delay before clearing the error” time.
31
32 (% class="box infomessage" %)
33 (((
34 If there is the "Overcurrent" error, the charging and discharging relay open.
35 )))
36
37 == 3.6.2 Undervoltage protection ==
38
39 The board implements battery protection from too low or too high voltage on the cells.
40
41 To change the battery protection parameters from low voltage on the cells, select the menu "Protections → Undervoltage protection":
42
43 [[Undervoltage protection settings>>image:1732212212350-294.png||data-xwiki-image-style-alignment="center" height="207" width="359"]]
44
45 In this section:
46
47 * Enable – a flag to enable the protection;
48 * Minimum cell voltage, V;
49 * Tolerant cell voltage, V;
50 * Delay before setting the error, second;
51 * Delay before clearing the error, second;
52 * Lock the error until the device is reset.
53
54 As a result of the operation of battery protection from low voltage, the "Undervoltage" error is generated.
55
56 Error generation conditions:
57
58 * the minimum voltage among all cells of the battery is less than the “Minimum cell voltage” value for the “Delay before setting the error” time.
59
60 Conditions for removing the error:
61
62 * the minimum voltage among all cells of the battery is greater than the “Tolerant cell voltage” value for the “Delay before clearing the error” time.
63
64 (% class="box infomessage" %)
65 (((
66 If there is the "Undervoltage" error, the discharging relay opens.
67 )))
68
69 3.6.3 Overvoltage protection
70
71 To change the battery protection parameters from high voltage on the cells, select the menu "Protections → Overvoltage protection":
72
73 [[image:1732212357972-295.png]]
74
75 In this section:
76
77 * Enable – a flag to enable the protection;
78 * Maximum cell voltage, V;
79 * Tolerant cell voltage, V;
80 * Delay before setting the error, second;
81 * Delay before clearing the error, second;
82 * Switch off the discharging relay on error – a flag to open the discharging relay when the "Overvoltage" error is generated;
83 * Lock the error until the device is reset.
84
85 As a result of the operation of the battery protection from high voltage, the "Overvoltage" error is generated.
86
87 Error generation conditions:
88
89 * the maximum voltage among all cells of the battery is greater than the “Maximum cell voltage” value for the “Delay before setting the error” time.
90
91 Conditions for removing the error:
92
93 * the maximum voltage among all cells of the battery is less than the “Tolerant cell voltage” value for the “Delay before clearing the error” time.
94
95 (% class="box infomessage" %)
96 (((
97 If there is the "Overvoltage" error, the charging relay and discharging relay opens (if the “Switch off the discharging relay on error” flag is set).
98 )))
99
100 == 3.6.4 Low temperature protection ==
101
102 The board implements battery protection from too low temperature.
103
104 To change the battery protection parameters from low temperature, select the menu "Protections → Low temperature protection":
105
106
107 In this section:
108
109 * Enable – a flag to enable the protection;
110 * Minimum charging temperature, °C;
111 * Tolerant charging temperature, °C;
112 * Minimum discharging temperature, °C;
113 * Tolerant discharging temperature, °C;
114 * Delay before setting the error, second;
115 * Delay before clearing the error, second;
116 * Lock the error until the device is reset.
117
118 As a result of the operation of the battery protection from low temperature, the "Low CH temperature" or “Low DCH temperature” error is generated.
119
120 Error generation conditions:
121
122 * the minimum temperature among all cells of the battery is less than the “Minimum charging (discharging) temperature” value for the “Delay before setting the error” time.
123
124 Conditions for removing the error:
125
126 * the minimum temperature among all cells of the battery is greater than the “Tolerant charging (discharging) temperature” value for the “Delay before clearing the error” time.
127
128 (% class="box infomessage" %)
129 (((
130 If there is the "Low CH temperature" error, the charging relay opens.
131 If there is the "Low DCH temperature" error, the discharging relay opens.
132 )))
133
134 == 3.6.5 High temperature protection ==
135
136 The board implements battery protection from too high temperature.
137
138 To change the battery protection parameters from high temperature, select the menu "Protections → High temperature protection":
139
140
141 In this section:
142
143 * Enable – a flag to enable the protection;
144 * Maximum charging temperature, °C;
145 * Tolerant charging temperature, °C;
146 * Maximum discharging temperature, °C;
147 * Tolerant discharging temperature, °C;
148 * Delay before setting the error, second;
149 * Delay before clearing the error, second;
150 * Lock the error until the device is reset.
151
152 As a result of the operation of the battery protection from high temperature, the "High CH temperature" or “High DCH temperature” error is generated.
153
154 Error generation conditions:
155
156 * the maximum temperature among all cells of the battery is greater than the “Maximum charging (discharging) temperature” value for the “Delay before setting the error” time.
157
158 Conditions for removing the error:
159
160 * the maximum temperature among all cells of the battery is less than the “Tolerant charging (discharging) temperature” value for the “Delay before clearing the error” time.
161
162 (% class="box infomessage" %)
163 (((
164 If there is the "High CH temperature" error, the charging relay opens.
165 If there is the "High DCH temperature" error, the discharging relay opens.
166 )))
167
168 == 3.6.6 Battery cover protection ==
169
170 To change the protection parameters from opening the battery cover, select the menu "Protections → Battery cover protection":
171
172 In this section:
173
174 * Enable – a flag to enable the protection;
175 * Delay before setting the error, second;
176 * Delay before clearing the error, second;
177 * Lock the error until the device is reset.
178
179 As a result of the operation of the protection against opening the battery cover, the “Battery cover error” is generated.
180
181 Error generation conditions:
182
183 * there is a signal from the battery cover during the “Delay before setting the error” time.
184
185 Conditions for removing the error:
186
187 * no signal from the battery cover during the “Delay before clearing the error” time.
188
189 (% class="box warningmessage" %)
190 (((
191 **If there is the "Battery cover error", the “Critical error” is generated and all relays open.**
192 )))
193
194 == 3.6.7 High humidity protection ==
195
196 The board can protect the battery from high humidity and water.
197
198 To change the protection parameters of the battery from high humidity, select the menu "Protections → High humidity protection":
199
200 In this section:
201
202 * Enable – a flag to enable the protection;
203 * Maximum humidty, RH%;
204 * Tolerant humidty, RH%;
205 * Delay before setting the error, second;
206 * Delay before clearing the error, second;
207 * Lock the error until the device is reset.
208
209 As a result of the operation of the battery protection from high humidity, the "High humidity" error is generated.
210
211 Error generation conditions:
212
213 * the measured humidity is greater than “Maximum humidity” during the “Delay before setting the error” time.
214
215 Conditions for removing the error:
216
217 * the measured humidity is less than the “Tolerant humidity” during the “Delay before clearing the error” time.
218
219 If there is the "High humidity" error, no action is taken. The error is indicative.
220
221
222 == 3.6.8  Water protection ==
223
224 == 3.6.9 Current sensor error ==
225
226 == 3.6.10 Short circuit protection ==
227
228 == 3.6.11 Contactor high temperature protection ==
229
230 == 3.6.12 Unallowable charging protection ==
231
232 == 3.6.13 Stuck contactor protection ==
233
234 == 3.6.14 Contactor feedback check ==
235
236 == 3.6.15 Charging contactor cycles protection ==
237
238 == 3.6.16 Discharging contactor cycles protection ==
239
240 == 3.6.17 Temperature sensor error ==
241
242 == 3.6.18 Logic high temperature protection ==
243
244 == 3.6.19 Logic offline protection ==
245
246 == 3.6.20 Cell count protection ==
247
248 == 3.6.21 Logic count protection ==
249
250 == 3.6.22 WDT protection ==
251
252 == 3.6.23 Insulation monitoring ==
253
254 == 3.6.24 Critical error parameters ==
255
256 == 3.6.25 General error parameters ==
257
258 == 3.6.26 Low SOC signal ==
259
260 == 3.6.27 High charging current signal ==
261
262 == 3.6.28 Heater control ==
263
264 == 3.6.29 Heater (AUX) control ==
265
266 == 3.6.30 Cooler control ==
267
268 == 3.6.31 Fault simulation ==