Skip to Content

Wiki source code of 3.6 Battery protection

Version 4.8 by Admin on 2024/11/21 18:09
Hide last authors
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:
24
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
101 3.6.4 Low temperature protection
102
Admin 4.4 103 3.6.5 High temperature protection
104
Admin 4.5 105 3.6.6 Battery cover protection
106
107 3.6.7 High humidity protection
108
109 3.6.8  Water protection
Admin 4.6 110 3.6.9 Current sensor error
111 3.6.10 Short circuit protection
112 3.6.11 Contactor high temperature protection
113 3.6.12 Unallowable charging protection
114 3.6.13 Stuck contactor protection
115 3.6.14 Contactor feedback check
116 3.6.15 Charging contactor cycles protection
117 3.6.16 Discharging contactor cycles protection
118 3.6.17 Temperature sensor error
119 3.6.18 Logic high temperature protection
120 3.6.19 Logic offline protection
121 3.6.20 Cell count protection
122 3.6.21 Logic count protection
Admin 4.8 123 3.6.22 WDT protection
Admin 4.5 124 Insulation monitoring
125 Critical error parameters
126 General error parameters
127 Low SOC signal
128 High charging current signal
129 Heater control
130 Heater (AUX) control
131 Cooler control
132 Fault simulation