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Wiki source code of 3.6 Battery protection

Version 4.10 by Admin on 2024/11/21 18:13
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Admin 1.1 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":
Admin 2.2 6
Admin 2.3 7 [[Overcurrent protection settings>>image:1732211959984-118.png||data-xwiki-image-style-alignment="center" height="266" width="386"]]
8
9
10 In this section:
11
12 * Enable – a flag to enable the protection;
13 * Maximum charging current, А;
14 * Tolerant charging current, А;
15 * Maximum discharging current, А;
16 * Tolerant discharging current, А;
17 * Delay before setting the error, second;
18 * Delay before clearing the error, second;
19 * Lock the error until the device is reset – a flag to block the error until the board is restarted.
20
21 As a result of operation of the current protection, the "Overcurrent" error is generated.
22
23 Error generation conditions:
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25 * 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;
26 * 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.
27
28 Conditions for removing the error:
29
30 * 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;
31 * 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.
32
33 (% class="box infomessage" %)
34 (((
35 If there is the "Overcurrent" error, the charging relay and discharging relay open.
36 )))
Admin 3.2 37
38 == 3.6.2 Undervoltage protection ==
39
40 The board implements battery protection from too low or too high voltage on the cells.
41
42 To change the battery protection parameters from low voltage on the cells, select the menu "Protections → Undervoltage protection":
43
Admin 3.3 44 [[Undervoltage protection settings>>image:1732212212350-294.png||data-xwiki-image-style-alignment="center" height="207" width="359"]]
45
46 In this section:
47
48 * Enable – a flag to enable the protection;
49 * Minimum cell voltage, V;
50 * Tolerant cell voltage, V;
51 * Delay before setting the error, second;
52 * Delay before clearing the error, second;
53 * Lock the error until the device is reset.
54
55 As a result of the operation of battery protection from low voltage, the "Undervoltage" error is generated.
56
57 Error generation conditions:
58
59 * 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.
60
61 Conditions for removing the error:
62
63 * 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.
64
65 (% class="box infomessage" %)
66 (((
67 If there is the "Undervoltage" error, the discharging relay opens.
68 )))
69
Admin 4.2 70 3.6.3 Overvoltage protection
71
72 To change the battery protection parameters from high voltage on the cells, select the menu "Protections → Overvoltage protection":
73
74 [[image:1732212357972-295.png]]
75
Admin 4.3 76 In this section:
77
78 * Enable – a flag to enable the protection;
79 * Maximum cell voltage, V;
80 * Tolerant cell voltage, V;
81 * Delay before setting the error, second;
82 * Delay before clearing the error, second;
83 * Switch off the discharging relay on error – a flag to open the discharging relay when the "Overvoltage" error is generated;
84 * Lock the error until the device is reset.
85
86 As a result of the operation of the battery protection from high voltage, the "Overvoltage" error is generated.
87
88 Error generation conditions:
89
90 * 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.
91
92 Conditions for removing the error:
93
94 * 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.
95
96 (% class="box infomessage" %)
97 (((
98 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).
99 )))
100
Admin 4.10 101 == 3.6.4 Low temperature protection ==
Admin 4.3 102
Admin 4.4 103
Admin 4.10 104 == 3.6.5 High temperature protection ==
Admin 4.5 105
Admin 4.10 106 == 3.6.6 Battery cover protection ==
Admin 4.5 107
Admin 4.10 108 == 3.6.7 High humidity protection ==
109
110 == 3.6.8  Water protection ==
111
112 == 3.6.9 Current sensor error ==
113
114 == 3.6.10 Short circuit protection ==
115
116 == 3.6.11 Contactor high temperature protection ==
117
118 == 3.6.12 Unallowable charging protection ==
119
120 == 3.6.13 Stuck contactor protection ==
121
122 == 3.6.14 Contactor feedback check ==
123
124 == 3.6.15 Charging contactor cycles protection ==
125
126 == 3.6.16 Discharging contactor cycles protection ==
127
128 == 3.6.17 Temperature sensor error ==
129
130 == 3.6.18 Logic high temperature protection ==
131
132 == 3.6.19 Logic offline protection ==
133
134 == 3.6.20 Cell count protection ==
135
136 == 3.6.21 Logic count protection ==
137
138 == 3.6.22 WDT protection ==
139
140 == 3.6.23 Insulation monitoring ==
141
142 == 3.6.24 Critical error parameters ==
143
144 == 3.6.25 General error parameters ==
145
146 == 3.6.26 Low SOC signal ==
147
148 == 3.6.27 High charging current signal ==
149
150 == 3.6.28 Heater control ==
151
152 == 3.6.29 Heater (AUX) control ==
153
154 == 3.6.30 Cooler control ==
155
156 == 3.6.31 Fault simulation ==