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Wiki source code of 2. Installation and connection

Version 19.1 by Admin on 2025/03/18 12:27
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1 (% data-numbered-headings-start="2" style="--numbered-headings-start: 1;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
2 = Installation and connection =
3
4 == ​​​​​Safety rules ==
5
6 Before use, **configure the system**. Proper operation of the BMS is possible only if it is correctly configured.
7
8 It is not recommended to use the system in batteries formed by several series of cells connected in parallel. To increase capacity, it is recommended to connect several cells in parallel groups, and then connect the groups in series.
9
10 (% class="box warningmessage" %)
11 (((
12 The BMS can be connected to batteries with life-threatening and health-hazardous voltage levels. When working with high-voltage batteries, observe electrical safety regulations, use safety glasses, protective clothing, insulated tools and appliances. To prevent the damage of device avoid electrostatic discharges while working with the battery.
13 )))
14
15 == Installation procedure ==
16
17 The mounting area of the BMS Logic 18 must be protected from mechanical particles (dust, dirt, large objects) and water. The BMS Logic 18 is recommended to be placed close to the cells it controls, but away from high current circuits to reduce interference to measuring circuits and increase overall reliability of installation.
18
19 The installation site must provide convenient access for subsequent connection to the device’s headers.
20
21 The BMS Logic 18 has a heat sink to dissipate the heat generated during the balancing of the cells. When used in enclosed enclosures, heat must be removed from the sink, otherwise it may damage the device.
22
23 Overall and mounting dimensions of the BMS Logic 18 are shown below.
24
25 [[image:1736771889450-259.png||data-xwiki-image-style-alignment="center" height="405" width="600"]]
26
27 |**Parameter**|**Value**
28 |(((
29 Overall dimensions (length × width × height), mm
30 )))|214 × 140 × 16
31 |Mounting dimensions (length × width), mm|198 × 132
32 |Mounting holes|M4
33
34 == Headers ==
35
36 The BMS Logic 18 is designed to measure temperature and voltage of 18 battery cells.
37
38 [[image:1736770801015-488.png||data-xwiki-image-style-alignment="center" height="350" width="600"]]
39
40 (% class="box warningmessage" %)
41 (((
42 **Attention!**
43 All headers are shown from the device side!
44 )))
45
46 === X1 – header for cells ===
47
48 Receptacle Housing: Molex 430252000. Terminals: Molex 43030
49
50 [[image:1733150257406-647.jpeg||data-xwiki-image-style-alignment="center" height="73" width="256"]]
51
52 |**Pin**|**Name**|**Description**
53 |**1**|**V-**|Minus of the cell stack
54 |**2**|**C2**|Cell #2
55 |**3**|**C4**|Cell #4
56 |**4**|**C6**|Cell #6
57 |**5**|**C8**|Cell #8
58 |**6**|**C10**|Cell #10
59 |**7**|**C12**|Cell #12
60 |**8**|**C14**|Cell #14
61 |**9**|**C16**|Cell #16
62 |**10**|**C18**|Cell #18 (maximum potential of the cell stack)
63 |**11**|-|-
64 |**12**|**C1**|Cell #1 (minimum potential with respect to V-)
65 |**13**|**C3**|Cell #3
66 |**14**|**C5**|Cell #5
67 |**15**|**C7**|Cell #7
68 |**16**|**C9**|Cell #9
69 |**17**|**C11**|Cell #11
70 |**18**|**C13**|Cell #13
71 |**19**|**C15**|Cell #15
72 |**20**|**C17**|Cell #17
73
74 === X2 – header 1 for temperature sensors ===
75
76 Receptacle Housing: Molex 430251800. Terminals: Molex 43030
77
78 [[image:1733150257408-172.jpeg||data-xwiki-image-style-alignment="center" height="81" width="267"]]
79
80 |**Pin**|**Name**|**Description**
81 |**1**|**TEMPG9**|Ground of the thermistor #9
82 |**2**|**TEMPG8**|Ground of the thermistor #8
83 |**3**|**TEMPG7**|Ground of the thermistor #7
84 |**4**|**TEMPG6**|Ground of the thermistor #6
85 |**5**|**TEMPG5**|Ground of the thermistor #5
86 |**6**|**TEMPG4**|Ground of the thermistor #4
87 |**7**|**TEMPG3**|Ground of the thermistor #3
88 |**8**|**TEMPG2**|Ground of the thermistor #2
89 |**9**|**TEMPG1**|Ground of the thermistor #1
90 |**10**|**TEMP9**|Signal from the thermistor #9
91 |**11**|**TEMP8**|Signal from the thermistor #8
92 |**12**|**TEMP7**|Signal from the thermistor #7
93 |**13**|**TEMP6**|Signal from the thermistor #6
94 |**14**|**TEMP5**|Signal from the thermistor #5
95 |**15**|**TEMP4**|Signal from the thermistor #4
96 |**16**|**TEMP3**|Signal from the thermistor #3
97 |**17**|**TEMP2**|Signal from the thermistor #2
98 |**18**|**TEMP1**|Signal from the thermistor #1
99
100 === X3 – header 2 for temperature sensors ===
101
102 Receptacle Housing: Molex 430251800. Terminals: Molex 43030
103
104 [[image:1733150257410-796.jpeg||data-xwiki-image-style-alignment="center" height="81" width="268"]]
105
106 |**Pin**|**Name**|**Description**
107 |**1**|**TEMPG18**|Ground of the thermistor #18
108 |**2**|**TEMPG17**|Ground of the thermistor #17
109 |**3**|**TEMPG16**|Ground of the thermistor #16
110 |**4**|**TEMPG15**|Ground of the thermistor #15
111 |**5**|**TEMPG14**|Ground of the thermistor #14
112 |**6**|**TEMPG13**|Ground of the thermistor #13
113 |**7**|**TEMPG12**|Ground of the thermistor #12
114 |**8**|**TEMPG11**|Ground of the thermistor #11
115 |**9**|**TEMPG10**|Ground of the thermistor #10
116 |**10**|**TEMP18**|Signal from the thermistor #18
117 |**11**|**TEMP17**|Signal from the thermistor #17
118 |**12**|**TEMP16**|Signal from the thermistor #16
119 |**13**|**TEMP15**|Signal from the thermistor #15
120 |**14**|**TEMP14**|Signal from the thermistor #14
121 |**15**|**TEMP13**|Signal from the thermistor #13
122 |**16**|**TEMP12**|Signal from the thermistor #12
123 |**17**|**TEMP11**|Signal from the thermistor #11
124 |**18**|**TEMP10**|Signal from the thermistor #10
125
126 === X4, X5 – headers for communication with BMS Main ===
127
128 Receptacle Housing: Molex 430250400. Terminals: Molex 43030
129
130 [[image:1733150513230-598.png||data-xwiki-image-style-alignment="center" height="89" width="81"]]
131
132 |**Pin**|**Name**|**Description**
133 |**1**|**RS485_A**|RS-485 line A for communication with the BMS Main
134 |**2**|**RS485_B**|RS-485 line B for communication with the BMS Main
135 |**3**|**+5V**|Supply voltage 5V
136 |**4**|**GND**|Ground
137
138 == Switches and Indicators ==
139
140 === SWD1 – address switch ===
141
142 |**Switch number**|**Description**
143 |**1**|The first (the lowest) bit of the address. Position ON - bit is 1
144 |**2**|The second bit is the address. Position ON - bit is 1
145 |**3**|The third bit of the address. Position ON - bit is 1
146 |**4**|The fourth bit of the address. Position ON - bit is 1
147 |**5**|The fifth (the highest) bit of the address. Position ON - bit is 1
148
149 (% class="box infomessage" %)
150 (((
151 **Note: **There is no SWD1 switch in the recent revisions of the BMS Logic 18. The device address must be configured in the settings (see the section [[3. Configuration>>doc:Battery management systems.BMS Logic 18.3\. Configuration.WebHome]]).
152 )))
153
154 === SWD2 – RS-485 termination resistor switch ===
155
156 To connect the termination resistor between the **RS485_A** and **RS485_B** lines, switch SWD2 to the ON position.
157
158 (% class="box infomessage" %)
159 (((
160 **Note: **There is no SWD2 switch in the recent revisions of the BMS Logic 18. Connect a 120 Ohm termination resistor directly to the X5 connector between the lines RS485_A and RS485_B.
161 )))
162
163 === DS1 – mode indicator ===
164
165 (% style="width:551px" %)
166 |(% style="width:188px" %)**State**|(% style="width:362px" %)**Description**
167 |(% style="width:188px" %)**Blinking**|(% style="width:362px" %)Connection between the BMS Main and the device is established
168 |(% style="width:188px" %)**Short flashing (~~50 milliseconds in a second)**|(% style="width:362px" %)The device is measuring voltage and temperature. No communication between the BMS Main and the device
169 |(% style="width:188px" %)**Long flashing (1 second in a 2 second period)**|(% style="width:362px" %)The device is in the bootloader mode
170
171 == Connection procedure ==
172
173 === Connection to BMS Main ===
174
175 To connect the BMS Main to BMS Logic 18 do the following steps:
176
177 1. Connect the BMS Main to the first BMS Logic 18 (P15 -> X4);
178 1. Connect the BMS Logic 18 to each other (X5 -> X4);
179 1. Switch SWD2 on the last BMS Logic 18 to the ON position or connect a 120 Ohm termination resistor directly to the X5 connector of the last BMS Logic 18.
180
181 (% class="box infomessage" %)
182 (((
183 **Recommendations:**
184 ~1. The total cable length (the sum of the lengths of all cables) between the BMS Main and the last BMS Logic 18 should not exceed 500 meters.
185 2. Make all connections with the same cable.
186 3. For a total cable length of more than 10 meters use twisted pair with the 120 Ohm wave impedance.
187 )))
188
189 === Connecting battery cells ===
190
191 To connect the battery cells, follow figure below. Incorrect connection of the cells can damage the BMS Logic 18.
192
193 Begin the connection with the negative of the battery: the "V-" of the first BMS Logic 18 is connected to "B-", then the first cell (C1) of the battery is connected, then the second (C2), etc. The “V-“ of the next BMS Logic 18 is connected to the C18 of the previous BMS Logic 18. If not all inputs of the cells are used, then the remaining inputs are connected to the cell with the most potential.
194
195
196 [[image:1733151263524-832.jpeg||data-xwiki-image-style-alignment="center" height="492" width="612"]]
197
198 (% class="box warningmessage" %)
199 (((
200 **Attention!**
201 Connect the battery according to the diagram, otherwise the device may be damaged!
202 )))
203
204 === Connecting thermistors ===
205
206 Thermistors should be fastened to the cells, excluding short circuits to the cell terminals (for example, isolate thermistors with heat shrink). For reliable operation, it is recommended to use all thermistors (a temperature sensor per cell).
207
208 [[image:1733231170607-745.png||data-xwiki-image-style-alignment="center" height="324" width="806"]]
209
210