Skip to Content

Wiki source code of 2. Installation and connection

Version 22.2 by Admin on 2025/03/18 13:01
Show last authors
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 = nstallation 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 Communication cable between BMS Main and BMS Logic devices must be deattached during connection of battery cells
11
12 (% class="box errormessage" %)
13 (((
14 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.
15 )))
16
17 == Installation procedure ==
18
19 The mounting area of the BMS Logic 12 must be protected from mechanical particles (dust, dirt, large objects) and water. The BMS Logic 12 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.
20
21 The installation site must provide convenient access for subsequent connection to the device’s headers.
22
23 The BMS Logic 12 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.
24
25 Overall and mounting dimensions of the BMS Logic 12 are shown below.
26
27 [[image:1736773655076-566.png||data-xwiki-image-style-alignment="center" height="534" width="600"]]
28
29 (% style="width:477px" %)
30 |**Parameter**|(% style="width:160px" %)**Value**
31 |Overall dimensions (length × width × height), mm|(% style="width:160px" %)139 × 126 × 16
32 |Mounting dimensions (length × width), mm|(% style="width:160px" %)123 × 118
33 |Mounting holes|(% style="width:160px" %)M4
34
35 == Headers ==
36
37 The BMS Logic 12 is designed to measure temperature and voltage of 12 battery cells.
38
39 [[image:1736770542979-717.png||data-xwiki-image-style-alignment="center" height="356" width="450"]]
40
41 (% class="box warningmessage" %)
42 (((
43 **Attention!**
44 All headers are shown from the device side!
45 )))
46
47 === X1 – header for cells ===
48
49 Receptacle Housing: Molex 430251400. Terminals: Molex 43030
50
51 [[image:1733143152741-474.jpeg||data-xwiki-image-style-alignment="center" height="81" width="210"]]
52
53 |**Pin**|**Name**|**Description**
54 |**1**|**V-**|Minus of the cell stack
55 |**2**|**C2**|Cell #2
56 |**3**|**C4**|Cell #4
57 |**4**|**C6**|Cell #6
58 |**5**|**C8**|Cell #8
59 |**6**|**C10**|Cell #10
60 |**7**|**C12**|Cell #12 (maximum potential of the cell stack)
61 |**8**|-|-
62 |**9**|**C1**|Cell #1 (minimum potential with respect to V-)
63 |**10**|**C3**|Cell #3
64 |**11**|**C5**|Cell #5
65 |**12**|**C7**|Cell #7
66 |**13**|**C9**|Cell #9
67 |**14**|**C11**|Cell #11
68
69 === X2 – header for temperature sensors ===
70
71 Receptacle Housing: Molex 430252400. Terminals: Molex 43030
72
73 [[image:1733143152745-708.jpeg||data-xwiki-image-style-alignment="center" height="92" width="368"]]
74
75 |**Pin**|**Name**|**Description**
76 |**1**|**TEMPG12**|Ground of the thermistor #12
77 |**2**|**TEMPG11**|Ground of the thermistor #11
78 |**3**|**TEMPG10**|Ground of the thermistor #10
79 |**4**|**TEMPG9**|Ground of the thermistor #9
80 |**5**|**TEMPG8**|Ground of the thermistor #8
81 |**6**|**TEMPG7**|Ground of the thermistor #7
82 |**7**|**TEMPG6**|Ground of the thermistor #6
83 |**8**|**TEMPG5**|Ground of the thermistor #5
84 |**9**|**TEMPG4**|Ground of the thermistor #4
85 |**10**|**TEMPG3**|Ground of the thermistor #3
86 |**11**|**TEMPG2**|Ground of the thermistor #2
87 |**12**|**TEMPG1**|Ground of the thermistor #1
88 |**13**|**TEMP12**|Signal from the thermistor #12
89 |**14**|**TEMP11**|Signal from the thermistor #11
90 |**15**|**TEMP10**|Signal from the thermistor #10
91 |**16**|**TEMP9**|Signal from the thermistor #9
92 |**17**|**TEMP8**|Signal from the thermistor #8
93 |**18**|**TEMP7**|Signal from the thermistor #7
94 |**19**|**TEMP6**|Signal from the thermistor #6
95 |**20**|**TEMP5**|Signal from the thermistor #5
96 |**21**|**TEMP4**|Signal from the thermistor #4
97 |**22**|**TEMP3**|Signal from the thermistor #3
98 |**23**|**TEMP2**|Signal from the thermistor #2
99 |**24**|**TEMP1**|Signal from the thermistor #1
100
101 === X3, X4 – headers for communication with BMS Main ===
102
103 Receptacle Housing: Molex 430250400. Terminals: Molex 43030
104
105 [[image:1733151077073-306.png||data-xwiki-image-style-alignment="center" height="78" width="71"]]
106
107 |**Pin**|**Name**|**Description**
108 |**1**|**RS485_A**|RS-485 line A for communication with the BMS Main
109 |**2**|**RS485_B**|RS-485 line B for communication with the BMS Main
110 |**3**|**+5V**|Supply voltage 5V
111 |**4**|**GND**|Ground
112
113 == (% style="color:inherit; font-family:inherit; font-size:max(20px, min(24px, 12.8889px + 0.925926vw))" %)Switches and indicators(%%) ==
114
115 === SWD1 – address switch ===
116
117 |**Switch number**|**Description**
118 |**1**|The first (the lowest) bit of the address. Position ON - bit is 1
119 |**2**|The second bit is the address. Position ON - bit is 1
120 |**3**|The third bit of the address. Position ON - bit is 1
121 |**4**|The fourth bit of the address. Position ON - bit is 1
122 |**5**|The fifth (the highest) bit of the address. Position ON - bit is 1
123
124 (% class="box infomessage" %)
125 (((
126 **Note: **There is no SWD1 switch in the recent revisions of the BMS Logic 12. The device address must be configured in the settings (see the section [[Configuration>>doc:Battery management systems.BMS Logic 12.3\. Configuration.WebHome]]).
127 )))
128
129 === SWD2 – RS-485 termination resistor switch ===
130
131 To connect the termination resistor between the **RS485_A** and **RS485_B** lines, switch the SWD2 to the ON position.
132
133 (% class="box infomessage" %)
134 (((
135 **Note: **There is no SWD2 switch in the recent revisions of the BMS Logic 12. Connect a 120 Ohm termination resistor directly to the X4 connector between the lines RS485_A and RS485_B.
136 )))
137
138 === DS1 – mode indicator ===
139
140 (% style="width:718px" %)
141 |**State**|(% style="width:422px" %)**Description**
142 |Blinking|(% style="width:422px" %)Connection between the BMS Main and the device is established
143 |Short flashing (~~50 milliseconds in a second)|(% style="width:422px" %)The device is measuring voltage and temperature. No communication between the BMS Main and the device
144 |Long flashing (1 second in a 2 second period)|(% style="width:422px" %)The device is in the bootloader mode
145
146 == Connection procedure ==
147
148 === Connection to BMS Main ===
149
150 To connect the BMS Main to BMS Logic 12 do the following steps:
151
152 1. Connect the BMS Main to the first BMS Logic 12 (P15 -> X3).
153 1. Connect the BMS Logic 12 to each other (X4 -> X3).
154 1. Switch SWD2 on the last BMS Logic 12 to the ON position or connect a 120 Ohm termination resistor directly to the X4 connector of the last BMS Logic 12.
155
156 (% class="box infomessage" %)
157 (((
158 **Recommendations:**
159 ~1. The total cable length (the sum of the lengths of all cables) between the BMS Main and the last BMS Logic 12 should not exceed 500 meters.
160 2. Make all connections with the same cable.
161 3. For a total cable length of more than 10 meters use twisted pair with the 120 Ohm wave impedance.
162 )))
163
164 === Connecting battery cells ===
165
166 To connect the battery cells, follow Figure 16. Incorrect connection of the cells can damage the BMS Logic 12.
167
168 Begin the connection with the negative of the battery: the "V-" of the first BMS Logic 12 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 12 is connected to the C12 of the previous BMS Logic 12. If not all inputs of the cells are used, then the remaining inputs are connected to the cell with the highest potential.
169
170 [[image:1733145484804-250.jpeg||data-xwiki-image-style-alignment="center" height="507" width="587"]]
171
172
173 (% class="box warningmessage" %)
174 (((
175 **Attention!**
176 Connect the battery according to the diagram, otherwise the device may be damaged.
177 )))
178
179 === Connecting thermistors ===
180
181 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).
182
183 [[image:1733231119798-210.jpeg||data-xwiki-image-style-alignment="center" height="408" width="539"]]
184
185