Wiki source code of 2. Installation and connection

Version 8.2 by Admin on 2025/02/20 13:17

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1.1	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	== Installation procedure ==
	5
3.1	6	The mounting area of the BMS Mini S must be protected from mechanical particles (dust, dirt, large objects) and water. The BMS Mini S 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.
1.1	7
	8	The installation site must provide convenient access for subsequent connection to the device’s headers for connecting other system elements: a current sensor, contactors, display panels.
	9
3.1	10	The BMS Mini S 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.
1.1	11
3.1	12	Overall and mounting dimensions of the BMS Mini S are shown on figures below.
1.1	13
	14
3.1	15	[[image:1733740731815-730.png\|\|data-xwiki-image-style-alignment="center" height="454" width="516"]]
1.1	16
3.1	17	[[image:1733740731820-300.png\|\|data-xwiki-image-style-alignment="center" height="172" width="453"]]
	18
4.1	19	\|Parameter\|Value
	20	\|Overall dimensions (length × width × height), mm\|124.5 × 117 × 17
3.1	21	\|Mounting dimensions (length × width), mm\|115 × 111
1.1	22	\|Mounting holes\|M3
	23
	24	== Headers ==
	25
3.1	26	There are names and locations of the BMS Mini S headers on figure below.
1.1	27
3.1	28	[[image:1733740765989-365.png\|\|data-xwiki-image-style-alignment="center" height="423" width="526"]]
1.1	29
6.1	30	=== X1 – header for contactors ===
1.1	31
8.1	32	Receptacle Housing: Molex 430251800. Terminals: Molex 43030
7.2	33
1.1	34	[[image:1733738660904-795.jpeg\|\|data-xwiki-image-style-alignment="center" height="96" width="316"]]
	35
	36	\|Pin\|Name\|Description
	37	\|1\|-\|-
	38	\|2\|+12V\|Supply voltage from the internal 12V DC/DC converter
	39	\|3\|GND\|Ground
	40	\|4\|+12V\|Supply voltage from the internal 12V DC/DC converter
	41	\|5\|GND\|Ground
	42	\|6\|+12V\|Supply voltage from the internal 12V DC/DC converter
	43	\|7\|GND\|Ground
	44	\|8\|+12V\|Supply voltage from the internal 12V DC/DC converter
	45	\|9\|GND\|Ground
	46	\|10\|-\|-
	47	\|11\|FB1\|Feedback signal from contactor 1
	48	\|12\|OUT1\|Contactor control 1 (low side switch), 100V, max 5A
	49	\|13\|FB2\|Feedback signal from contactor 2
	50	\|14\|OUT2\|Contactor control 2 (low side switch), 100V, max 5A
	51	\|15\|FB3\|Feedback signal from contactor 3
	52	\|16\|OUT3\|Contactor control 3 (low side switch), 100V, max 5A
	53	\|17\|FB4\|Feedback signal from contactor 4
	54	\|18\|OUT4\|Contactor control 4 (low side switch), 100V, max 5A
	55
	56	(% class="box warningmessage" %)
	57	(((
	58	ATTENTION!!!
	59	The load should be connected to +12V and OUTx pins. The feedback signal should be connected to FBx and GND pins. Below is an example of connecting the BMS to a contactor:
4.1	60	[[image:1733738760833-185.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true"]]
1.1	61	)))
	62
	63	=== X2 – mini-USB connector. ===
	64
4.1	65	Mini-USB connector is used for configuring the BMS via ElectricDeviceMonitor.
1.1	66
7.2	67	=== X3 – header for discrete inputs and outputs signals ===
1.1	68
8.1	69	Receptacle Housing: Molex 430251600. Terminals: Molex 43030
7.2	70
	71	(% class="wikigeneratedid" %)
	72	[[image:1733738860923-996.png\|\|data-xwiki-image-style-alignment="center" height="90" width="283"]]
	73
1.1	74	\|Pin\|Name\|Description
	75	\|1\|DIN1\|Discrete input 1 “dry contact” (+5V)
	76	\|2\|DIN2\|Discrete input 2 “dry contact” (+5V)
	77	\|3\|DIN3\|Discrete input 3 “dry contact” (+5V)
	78	\|4\|DIN4\|Discrete input 4 “dry contact” (+5V)
	79	\|5\|DOUT1\|Discrete output 1 (+5V, 20mA)
	80	\|6\|DOUT2\|Discrete output 2 (+5V, 20mA)
	81	\|7\|DOUT3\|Discrete output 3 (+5V, 20mA)
	82	\|8\|DOUT4\|Discrete output 4 (+5V, 20mA)
	83	\|9\|GND\|Discrete input 1 “dry contact” (ground)
	84	\|10\|GND\|Discrete input 2 “dry contact” (ground)
	85	\|11\|GND\|Discrete input 3 “dry contact” (ground)
	86	\|12\|GND\|Discrete input 4 “dry contact” (ground)
	87	\|13\|GND\|Discrete output 1 (ground)
	88	\|14\|GND\|Discrete output 2 (ground)
	89	\|15\|GND\|Discrete output 3 (ground)
	90	\|16\|GND\|Discrete output 4 (ground)
	91
7.2	92	=== Х4 – header for САN and RS485 interfaces ===
1.1	93
8.1	94	Receptacle Housing: Molex 430250600. Terminals: Molex 43030
7.2	95
1.1	96	[[image:1733738660905-974.jpeg\|\|data-xwiki-image-style-alignment="center" height="70" width="97"]]
	97
	98	\|Pin\|Name\|Description
	99	\|1\|RS485_B\|RS485 line B
	100	\|2\|+5V\|Isolated supply voltage 5V, max 400mA
	101	\|3\|CAN_L\|CAN-L line of the CAN bus
	102	\|4\|RS485_A\|RS485 line A
	103	\|5\|GND\|Isolated ground
	104	\|6\|CAN_H\|CAN-H line of the CAN bus
	105
7.2	106	=== Х5 – header for ON/OFF button ===
1.1	107
7.2	108	(% class="wikigeneratedid" %)
8.1	109	Receptacle Housing: Molex 430250200. Terminals: Molex 43030
7.2	110
	111	(% class="wikigeneratedid" %)
	112	[[image:1733739076878-324.png\|\|data-xwiki-image-style-alignment="center" height="70" width="41"]]
	113
1.1	114	\|Pin\|Name\|Description
	115	\|1\|BTN\|Signal to turn on/off the BMS (“dry contact”, +3.3V)
	116	\|2\|GND\|Signal to turn on/off the BMS (“dry contact”, ground)
	117
7.2	118	=== X6 – header for cells temperature sensors ===
1.1	119
8.1	120	Receptacle Housing: Molex 430251200. Terminals: Molex 43030
7.2	121
1.1	122	[[image:1733738660906-697.png\|\|data-xwiki-image-style-alignment="center" height="91" width="190"]]
	123
	124	\|Pin\|Name\|Description
	125	\|1\|TEMPG1\|Ground of the thermistor 1
	126	\|2\|TEMPG2\|Ground of the thermistor 2
	127	\|3\|TEMPG3\|Ground of the thermistor 3
	128	\|4\|TEMPG4\|Ground of the thermistor 4
	129	\|5\|TEMPG5\|Ground of the thermistor 5
	130	\|6\|TEMPG6\|Ground of the thermistor 6
	131	\|7\|TEMP1\|Signal from the thermistor 1
	132	\|8\|TEMP2\|Signal from the thermistor 2
	133	\|9\|TEMP3\|Signal from the thermistor 3
	134	\|10\|TEMP4\|Signal from the thermistor 4
	135	\|11\|TEMP5\|Signal from the thermistor 5
	136	\|12\|TEMP6\|Signal from the thermistor 6
	137
7.2	138	=== X7 - header for current sensor ===
1.1	139
7.2	140	(% class="wikigeneratedid" %)
8.1	141	Receptacle Housing: Molex 430250400. Terminals: Molex 43030
7.2	142
	143
	144
	145
	146
	147
	148
	149
	150	(% class="wikigeneratedid" %)
	151	[[image:1733739118831-618.png\|\|data-xwiki-image-style-alignment="center" height="79" width="71"]]
	152
1.1	153	\|Pin\|Name\|Description
	154	\|1\|+5V\|Supply voltage for a current sensor 5V, max 50 mA
	155	\|2\|GND\|Ground
	156	\|3\|Vcs\|ADC input (current sensor output)
	157	\|4\|Vref\|Auxiliary ADC input (current sensor reference signal)
	158
	159	=== Х8 – header for battery cells ===
	160
8.1	161	Receptacle Housing: Molex 430251400. Terminals: Molex 43030
7.2	162
3.1	163	[[image:1733740846257-439.png\|\|data-xwiki-image-style-alignment="center" height="89" width="219"]]
1.1	164
	165	\|Pin\|Name\|Description
	166	\|1\|C0\|Minus of the cell stack (for measuring purposes only)
	167	\|2\|C2\|Cell 2
	168	\|3\|C4\|Cell 4
	169	\|4\|C6\|Cell 6
	170	\|5\|C8\|Cell 8
	171	\|6\|C10\|Cell 10
3.1	172	\|7\|C12\|Cell 12 (maximum potential of the cell stack, for measuring purposes only)
	173	\|8\|NC\|Not connected
	174	\|9\|C1\|Cell 1 (minimum potential with respect to C0)
	175	\|10\|C3\|Cell 3
	176	\|11\|C5\|Cell 5
	177	\|12\|C7\|Cell 7
	178	\|13\|C9\|Cell 9
	179	\|14\|C11\|Cell 11
1.1	180
	181	=== Х9 – header to power the device ===
	182
8.1	183	Receptacle Housing: Molex 436450200. Terminals: Molex 43030
7.2	184
1.1	185	[[image:1733738660910-242.png\|\|data-xwiki-image-style-alignment="center" height="61" width="78"]]
	186
	187	\|Pin\|Name\|Description
3.1	188	\|1\|VBAT+\|Supply voltage for BMS Mini S
	189	\|2\|VBAT-\|BMS Mini S power ground
1.1	190
	191	(% class="box warningmessage" %)
	192	(((
2.1	193	Attention! The BMS Mini S device is galvanically connected to the battery (the minus of the battery is the device ground). In view of this, when a BMS Wi-Fi or BMS GSM module is connected to the device, the antenna braid will also be galvanically connected to the battery (connected to the battery negative). It is recommended to isolate the antenna cable from the battery case to prevent negative potential from appearing on the case.
1.1	194	)))
	195
	196	=== J1 – jumper for switching CAN bus terminal resistor ===
	197
2.1	198	To connect the terminal resistor between the CAN_H and CAN_L lines, install the jumper J1 according to the following figure:
1.1	199
	200	[[image:1733738660910-372.png\|\|data-xwiki-image-style-alignment="center" height="85" width="162"]]
	201
	202	=== J2 – jumper for switching RS-485 terminal resistor ===
	203
2.1	204	To connect the terminal resistor between the RS485_A and RS485_B lines, install the jumper J1 according to the following figure:
1.1	205
	206	[[image:1733738660910-372.png\|\|data-xwiki-image-style-alignment="center" height="85" width="162"]]
	207
	208	== Connection procedure ==
	209
	210	=== Connecting battery cells ===
	211
	212	To connect battery cells, follow figure below. Incorrect connection of the cells can damage the BMS Mini.
	213
	214	Begin the connection with the negative line of the battery: the “C0“ is connected to the “B-“, then the first cell (C1) is connected, then the second (С2), etc. If not all inputs of the cells are used, then the remaining inputs are connected to the cell with the most potential.
	215
3.1	216	[[image:1733740980966-804.png\|\|data-xwiki-image-style-alignment="center" height="471" width="721"]]
1.1	217
	218	(% class="box warningmessage" %)
	219	(((
	220	Attention!
	221	Connect the battery according to the diagram, otherwise the device may be damaged.
	222	)))
	223
	224	=== Connecting thermistors ===
	225
	226	Thermistors should be fastened to the cells, excluding short circuits to the cell terminals (for example, isolate thermistors with heat shrink).
	227
	228	[[image:1733738660915-688.png\|\|data-xwiki-image-style-alignment="center"]]
	229
	230

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