LCD – TFT 2.8” for REC BMS User Manual
Contents
1. amp REC Rozna ulica 20 6230 Postojna Slovenia Control Your Power e mail info rec bms com www rec bms com LCD TFT 2 8 for REC BMS User Manual Features robust and small design touch screen display low power consumption main parameters view tab 4 sub menu tab settings menu tab portrait landscape view automatic manual backlight setting hibernate timer reverse polarity supply voltage protection under and over voltage protection aluminum enclosure one year warranty General description of the LCD touch display for REC BMS Battery management system BMS is a device that monitors and controls each cell in the battery pack by measuring its parameters Its job is to maintain the battery pack in the safe operating range provided by the manufacturer 2 8 LCD TFT screen shows all the parameters of the electric hybrid vehicle equipped with REC BMS LCD TFT may be connected to the independent BMS unit 4 15 cells or Master BMS unit up to 225 cells User can monitor the parameters in real time and diagnose the potential errors in the system LCD TFT requires its own power supply 10 16 V Reverse polarity under voltage and over voltage protection is integrated in the power management circuit of the LCD TFT An ambient light sensor is added to automatically adapt backlight of the LCD and decrease power consumption LCD TFT is equipped with professional protection foil with spa2. cer dots to cancel the light interference on the display User can define the communication cable length from 0 3 m to 6 m and choose between back or side cable exit LCD TFT 2 8 USER MANUAL Table 1 General parameter table Parameter ate it Supply voltage 10 16 Supply current 10 0 V Low voltage disconnect 28 LN Enclosure dimensions w x x h 104 x 69 x 16 mm Weight 6 m communication cable A0 g System overview 2 8 LCD TFT screen Ambient light sensor a gt RS 485 Communication CS connector _ Power Supply cables d Figure 1 LCD TFT overview Table 2 LCD TFT tab description o Main parameters First tab shows main parameters of the battery powered system Second tab shows each cell s voltage User can sweep through Cell s voltage os slave units if present SC Third tab shows each cell s DC impedance User can sweep Li Cell s impedance Gg through slave units if present T i Forth tab shows battery pack temperature User can sweep d Cell s temperature SEN C through slave units if present k BMS temperature Fifth tab shows each BMS temperature passive balancing LCD TFT settings Sixth display serves for LCD TFT settings 2 www rec bms com LCD TFT 2 8 USER MANUAL TIME TO FULL CMAX V TEMP C 3 489 3 384 25 5 Figure 2 First tab main parameters Table 3 First tab main parameters overview Window Descriptio
3. ect the LCD TFT communication cable Apply the power supply 10 16V Figure 9 LCD TFT connection to REC BMS OR Connect the LCD TFT communication cable o Apply the power supply 10 16V Figure 10 LCD TFT connection to REC BMS Master Unit OM 6 www rec bms com
4. n S O TIME TO FULL EMPTY Approximate time when the battery pack is full charging or empty discharging CMAX V Maximum cell s voltage B ss gg A 24 i Slave unit select Cell 1 3 489 Y Cell 2 3 386 Y Cell 3 3 446 Y Cell 4 3 384 Figure 3 Second tab cell s voltages 3 www rec bms com LCD TFT 2 8 USER MANUAL Prev BMS 1 1 Cell 1 2 000 mOhm Cell 2 2 000 mOhm Cell 3 2 000 mOhm Cell 4 2 000 mOhm prey BMS 1 1 mao t remp 1 Figure 5 Fourth tab cell s temperatures BMS 1 BMS 1 Temp 26 1 C Figure 6 Fifth tab BMS temperatures 4 www rec bms com LCD TFT 2 8 USER MANUAL DISPLAY M POWER Z SOc Mm BAT VOLT Bi CURRENT v CMAX Mi CMIN S EE P OFF e 10 min RS e LIGHT DIAGNOSTIC Noe Figure 7 LCD TFT settings Table 4 LCD TFT settings buttons description icon Description S DIAGNOSTIC Describes the error in the system RS 485 Communication connector Figure 8 LCD TFT RS 485 DB9 female connector front view Table 5 RS 485 DB 9 connections De e e e ei Oe ee et Fee www rec bms com LCD TFT 2 8 USER MANUAL LCD TFT is providing 3 4 V for power supply of the galvanically isolated RS 485 driver Galvanic isolation up to 2 5 kV is provided No additional termination resistors are required 2 8 LCD TFT connection instructions Conn
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