Wiki source code of 2. Installation and connection

Version 7.1 by Admin on 2025/02/06 11:41

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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
7.1	23	\|Headers X1, X3-X9 type\|Molex series Micro-Fit
1.1	24
	25	== Headers ==
	26
3.1	27	There are names and locations of the BMS Mini S headers on figure below.
1.1	28
3.1	29	[[image:1733740765989-365.png\|\|data-xwiki-image-style-alignment="center" height="423" width="526"]]
1.1	30
6.1	31	=== X1 – header for contactors ===
1.1	32
	33	[[image:1733738660904-795.jpeg\|\|data-xwiki-image-style-alignment="center" height="96" width="316"]]
	34
	35	\|Pin\|Name\|Description
	36	\|1\|-\|-
	37	\|2\|+12V\|Supply voltage from the internal 12V DC/DC converter
	38	\|3\|GND\|Ground
	39	\|4\|+12V\|Supply voltage from the internal 12V DC/DC converter
	40	\|5\|GND\|Ground
	41	\|6\|+12V\|Supply voltage from the internal 12V DC/DC converter
	42	\|7\|GND\|Ground
	43	\|8\|+12V\|Supply voltage from the internal 12V DC/DC converter
	44	\|9\|GND\|Ground
	45	\|10\|-\|-
	46	\|11\|FB1\|Feedback signal from contactor 1
	47	\|12\|OUT1\|Contactor control 1 (low side switch), 100V, max 5A
	48	\|13\|FB2\|Feedback signal from contactor 2
	49	\|14\|OUT2\|Contactor control 2 (low side switch), 100V, max 5A
	50	\|15\|FB3\|Feedback signal from contactor 3
	51	\|16\|OUT3\|Contactor control 3 (low side switch), 100V, max 5A
	52	\|17\|FB4\|Feedback signal from contactor 4
	53	\|18\|OUT4\|Contactor control 4 (low side switch), 100V, max 5A
	54
	55	(% class="box warningmessage" %)
	56	(((
	57	ATTENTION!!!
	58	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	59	[[image:1733738760833-185.png\|\|data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true"]]
1.1	60	)))
	61
	62	=== X2 – mini-USB connector. ===
	63
4.1	64	Mini-USB connector is used for configuring the BMS via ElectricDeviceMonitor.
1.1	65
3.1	66	=== X3 – header for discrete inputs and outputs signals.[[image:1733738860923-996.png\|\|data-xwiki-image-style-alignment="center" height="90" width="283"]] ===
1.1	67
	68	\|Pin\|Name\|Description
	69	\|1\|DIN1\|Discrete input 1 “dry contact” (+5V)
	70	\|2\|DIN2\|Discrete input 2 “dry contact” (+5V)
	71	\|3\|DIN3\|Discrete input 3 “dry contact” (+5V)
	72	\|4\|DIN4\|Discrete input 4 “dry contact” (+5V)
	73	\|5\|DOUT1\|Discrete output 1 (+5V, 20mA)
	74	\|6\|DOUT2\|Discrete output 2 (+5V, 20mA)
	75	\|7\|DOUT3\|Discrete output 3 (+5V, 20mA)
	76	\|8\|DOUT4\|Discrete output 4 (+5V, 20mA)
	77	\|9\|GND\|Discrete input 1 “dry contact” (ground)
	78	\|10\|GND\|Discrete input 2 “dry contact” (ground)
	79	\|11\|GND\|Discrete input 3 “dry contact” (ground)
	80	\|12\|GND\|Discrete input 4 “dry contact” (ground)
	81	\|13\|GND\|Discrete output 1 (ground)
	82	\|14\|GND\|Discrete output 2 (ground)
	83	\|15\|GND\|Discrete output 3 (ground)
	84	\|16\|GND\|Discrete output 4 (ground)
	85
	86	=== Х4 – header for САN and RS485 interfaces. ===
	87
	88	[[image:1733738660905-974.jpeg\|\|data-xwiki-image-style-alignment="center" height="70" width="97"]]
	89
	90	\|Pin\|Name\|Description
	91	\|1\|RS485_B\|RS485 line B
	92	\|2\|+5V\|Isolated supply voltage 5V, max 400mA
	93	\|3\|CAN_L\|CAN-L line of the CAN bus
	94	\|4\|RS485_A\|RS485 line A
	95	\|5\|GND\|Isolated ground
	96	\|6\|CAN_H\|CAN-H line of the CAN bus
	97
3.1	98	=== Х5 – header for ON/OFF button.[[image:1733739076878-324.png\|\|data-xwiki-image-style-alignment="center" height="70" width="41"]] ===
1.1	99
	100	\|Pin\|Name\|Description
	101	\|1\|BTN\|Signal to turn on/off the BMS (“dry contact”, +3.3V)
	102	\|2\|GND\|Signal to turn on/off the BMS (“dry contact”, ground)
	103
	104	=== X6 – header for cells temperature sensors. ===
	105
	106	[[image:1733738660906-697.png\|\|data-xwiki-image-style-alignment="center" height="91" width="190"]]
	107
	108	\|Pin\|Name\|Description
	109	\|1\|TEMPG1\|Ground of the thermistor 1
	110	\|2\|TEMPG2\|Ground of the thermistor 2
	111	\|3\|TEMPG3\|Ground of the thermistor 3
	112	\|4\|TEMPG4\|Ground of the thermistor 4
	113	\|5\|TEMPG5\|Ground of the thermistor 5
	114	\|6\|TEMPG6\|Ground of the thermistor 6
	115	\|7\|TEMP1\|Signal from the thermistor 1
	116	\|8\|TEMP2\|Signal from the thermistor 2
	117	\|9\|TEMP3\|Signal from the thermistor 3
	118	\|10\|TEMP4\|Signal from the thermistor 4
	119	\|11\|TEMP5\|Signal from the thermistor 5
	120	\|12\|TEMP6\|Signal from the thermistor 6
	121
3.1	122	=== X7 - header for current sensor.[[image:1733739118831-618.png\|\|data-xwiki-image-style-alignment="center" height="79" width="71"]] ===
1.1	123
	124	\|Pin\|Name\|Description
	125	\|1\|+5V\|Supply voltage for a current sensor 5V, max 50 mA
	126	\|2\|GND\|Ground
	127	\|3\|Vcs\|ADC input (current sensor output)
	128	\|4\|Vref\|Auxiliary ADC input (current sensor reference signal)
	129
	130	=== Х8 – header for battery cells ===
	131
3.1	132	[[image:1733740846257-439.png\|\|data-xwiki-image-style-alignment="center" height="89" width="219"]]
1.1	133
	134	\|Pin\|Name\|Description
	135	\|1\|C0\|Minus of the cell stack (for measuring purposes only)
	136	\|2\|C2\|Cell 2
	137	\|3\|C4\|Cell 4
	138	\|4\|C6\|Cell 6
	139	\|5\|C8\|Cell 8
	140	\|6\|C10\|Cell 10
3.1	141	\|7\|C12\|Cell 12 (maximum potential of the cell stack, for measuring purposes only)
	142	\|8\|NC\|Not connected
	143	\|9\|C1\|Cell 1 (minimum potential with respect to C0)
	144	\|10\|C3\|Cell 3
	145	\|11\|C5\|Cell 5
	146	\|12\|C7\|Cell 7
	147	\|13\|C9\|Cell 9
	148	\|14\|C11\|Cell 11
1.1	149
	150	=== Х9 – header to power the device ===
	151
	152	[[image:1733738660910-242.png\|\|data-xwiki-image-style-alignment="center" height="61" width="78"]]
	153
	154	\|Pin\|Name\|Description
3.1	155	\|1\|VBAT+\|Supply voltage for BMS Mini S
	156	\|2\|VBAT-\|BMS Mini S power ground
1.1	157
	158	(% class="box warningmessage" %)
	159	(((
2.1	160	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	161	)))
	162
	163	=== J1 – jumper for switching CAN bus terminal resistor ===
	164
2.1	165	To connect the terminal resistor between the CAN_H and CAN_L lines, install the jumper J1 according to the following figure:
1.1	166
	167	[[image:1733738660910-372.png\|\|data-xwiki-image-style-alignment="center" height="85" width="162"]]
	168
	169	=== J2 – jumper for switching RS-485 terminal resistor ===
	170
2.1	171	To connect the terminal resistor between the RS485_A and RS485_B lines, install the jumper J1 according to the following figure:
1.1	172
	173	[[image:1733738660910-372.png\|\|data-xwiki-image-style-alignment="center" height="85" width="162"]]
	174
	175	== Connection procedure ==
	176
	177	=== Connecting battery cells ===
	178
	179	To connect battery cells, follow figure below. Incorrect connection of the cells can damage the BMS Mini.
	180
	181	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.
	182
3.1	183	[[image:1733740980966-804.png\|\|data-xwiki-image-style-alignment="center" height="471" width="721"]]
1.1	184
	185	(% class="box warningmessage" %)
	186	(((
	187	Attention!
	188	Connect the battery according to the diagram, otherwise the device may be damaged.
	189	)))
	190
	191	=== Connecting thermistors ===
	192
	193	Thermistors should be fastened to the cells, excluding short circuits to the cell terminals (for example, isolate thermistors with heat shrink).
	194
	195	[[image:1733738660915-688.png\|\|data-xwiki-image-style-alignment="center"]]
	196
	197

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