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1、 BACM2420A BATTERY CHARGER USER MANUAL All rights reserved.No part of this publication may be reproduced in any material form(including photocopying or storing in any medium by electronic means or other)without the written permission of the copyright holder.Applications for the copyright holders wri
2、tten permission to reproduce any part of this publication should be addressed to Smartgen Technology at the address above.Any reference to trademarked product names used within this publication is owned by their respective companies.SmartGen Technology reserves the right to change the contents of th
3、is document without prior notice.Table 1 Software Version Date Version Note 2020-03-29 1.0 Original Release CONTENT 1 OVERVIEW.4 2 PERFORMANCE AND CHARACTERISTICS.4 3 CHARGING PRINCIPLE.5 4 PARAMETERS CONFIGURATION.7 5 PARAMETERS SPECIFICATION.9 6 OPERATION.10 7 CONNECTION.11 8 CASE DIMENSIONS.12 1
4、OVERVIEW BACM2420A battery charger is an intelligent and multi-function charger,which is specially designed to meet the charging characteristics of the lead-acid engine starter batteries.It is suitable for 24V or 12V battery pack and the maximum output current is 20A.2 PERFORMANCE AND CHARACTERISTIC
5、S It has the following characteristics:a)Switch power supply structure,wide AC voltage input range,small size,light weight,high efficiency;b)Users can select automatic two-stage charging process or automatic three-stage charging process according to needs.Both two charging processes are carried out
6、according to storage battery charging characteristics,which can prevent overcharging and significantly prolong battery lifetime;c)Built-in PFC circuit,which allows to calibrate the power factor up to 0.99;d)Battery voltage detection ports,which can detect the battery voltage at real time.e)Battery u
7、nder voltage output port;it will output low level immediately after the battery voltage has fallen below the set value after preset delay.f)Temperature sensor port,which allows monitoring the battery temperature at real time;and temperature compensation function,which can prevent too high battery te
8、mperature effectively;g)Mains failure alarm port;It will output low level when the AC input is interrupted;h)Standard RS485 serial communication port.i)Default suitable for 24V battery pack;it can be changed to 12V battery pack by changing configuration information;rated charging current is 20A;j)Ex
9、ternal LED status display:Full charged indication(Green light)and charging indication(Red light).3 CHARGING PRINCIPLE Fig.1 Three-stage Charging Curve Three-stage charging method is used according to the battery charging characteristics.1)The first stage is named constant current.a):Trickle Charge:w
10、hen the battery terminal voltage is relatively low,the charging current is low likewise,which effectively prevents battery damage from too high temperature.The charging indicator(Red color)status is illuminated.b):Quick Charge:When the battery terminal voltage is relatively high,the charging current
11、 will rise to rated value.Large current charging operation leads to a rapid increase in the electrical quantity of the battery.The charging indicator(Red color)status is flashing rapidly(0.2s/per).2)The second stage is named absorption charge.After the first stage,the battery voltage rises to absorp
12、tion charge value rapidly,and the charger voltage will keep constant.The battery terminal voltage will stabilize in the absorption charge value with the decreasing of charging current.The charging indicator(Red color)status is flashing slowly(1s/per).3)The third stage is named float charge:After the
13、 above two stages,the charging is basically completed and charger output voltage changes to float voltage automatically.Charging current decreases to floating charging current.Red charging indication is extinguished.Green full charging indication is illuminated.Afterwards charging current neutralize
14、s self-discharge of the battery.Even long-term charging doesnt do harm to the battery.That is,charger not only can keep the battery fully charged but also guarantee long lifetime of the battery.Fig.2 Two-stage Charging Curve Two-stage charging method is performed according to the battery charging ch
15、aracteristics.1)The first stage is named constant current.a):Trickle Charge:when the battery terminal voltage is relatively low,the charging current is low likewise,which can prevent battery damage from too high temperature.The charging indicator(Red color)status is illuminated.b):Quick Charge:When
16、the battery terminal voltage is relatively high,the charging current will rise to rated value.Large current charging operation leads to a rapid increase in the electrical quantity of the battery.The charging indicator(Red color)status is flashing rapidly(0.2s/per).2)The second stage is named float c
17、harge.The charging current will decrease with the rising of battery electricity.The charging indicator(Red color)status is flashing slowly(1s/per).As soon as charging current value falls below 0.3A,the battery is basically fully charged(Red indicator will extinguish and the green indicator will be i
18、lluminated).After that charging current will only neutralize the battery self-discharge.Even long-term charging cannot harm the battery,as charger can keep the battery fully charged and also guarantee long lifetime of the battery.Table 2 Charging Indicator Status Mode Indicator Charging Status Const
19、ant Current Constant Voltage Float Charge Charge Failure Trickle Charge Quick Charge Two Stage Red On Flash(Rapidly)None Flash(Slowly)Off Flash(Rapidly)Green Off Off None OffOn Flash(Rapidly)Three Stage Red On Flash(Rapidly)Flash(Slowly)Off Flash(Rapidly)Green Off Off Off On Flash(Rapidly)4 PARAMETE
20、RS CONFIGURATION Table 3 Parameter Configuration List Items Default Adjustable Range Description 24V 12V 24V 12V Battery Type 1(02)0:12V；1:24V；2:Self-adaption Charging Stage 3(23)2:Two Stage;3:Three Stage Max.Rated Current 20.0A Nonadjustable Maximum charging current Rated Current 100%(0100)%Maximum
21、 charging current percentage Absorption Charge Voltage 28.2V 14.1V(2032)V(1016)V The charging voltage of“Constant Voltage”Absorption Charge Time 1(01)0:Disable;1:Enable Absorption Charge Time Setting 1.0h(0.1100)h The charging time of“Constant Voltage”Absorption Charge Complete Current 1(01)0:Disabl
22、e;1:Enable Complete Current Setting 0.5A(0.203.00)A The transition current from“Absorption Charge”transfer to“Float Charge”.Float Charge Voltage 27.0V 13.5V(2032)V(1016)V The voltage of“Float Charge”AUTO BOOST Voltage 25.6V 12.8V(2032)V(1016)V When the charger is in“Float Mode”,it enters into“Quick
23、Charge”if the battery voltage has fallen below the set value.Trickle Charge 1(01)0:Disable;1:Enable Trickle Charge Voltage 22.0V 11.0V(2032)V(1016)V The voltage of“Trickle Charge”Trickle Charge Current 50%(0100)%Maximum charging current percentage Battery Detection 0(01)0:Disable;1:Enable Battery Un
24、der Voltage Warn 1(01)0:Disable;1:Enable Under Voltage Set Value 23.0V 11.50V(16.032.0)V(8.016.0)V “Under voltage”alarm will be initiated if the battery voltage has fallen below the set value.Under Voltage Delay 120s(03600)s “Under voltage”alarm will be initiated if the battery voltage has fallen be
25、low the set value and the delay timer has expired.Under Voltage Return Value 24.0V 12.0V(16.032.0)V(8.016.0)V The transition voltage from“under voltage”transfer to“normal voltage”.Under Voltage Return Delay 10s(03600)s “Under voltage”alarm will be removed if the battery voltage has exceeded the retu
26、rn value and the delay timer has expired.Temperature 1(01)0:Disable;1:Enable Items Default Adjustable Range Description 24V 12V 24V 12V Sensor Temperature Compensation 1(01)0:Disable;1:Enable Temperature Compensation Set Value 0.036 V/0.018 V/(0.0200.060)V/(0.0100.030)V/The Compensation of each 1 ch
27、ange on 20 basis.High Temp.Warn 1(01)0:Disable;1:Enable High Temp.Set Value 55(080)“High Temp.”alarm will be initiated if the battery temperature has exceeded the set value.High Temp.Delay 0.5s(060.0)s “High Temp.”alarm will be initiated if the battery temperature has exceeded the set value and the
28、delay timer has expired.High Temp.Return Value 50(080)The transition temperature from“High Temp.”transfer to“Normal Temp.”.High Temp.Return Delay 1s(060.0)s “High Temp.”alarm will be removed if the battery temperature has fallen below the return value and the delay timer has expired.Aux.Input Port 3
29、(04)0.Not Used；1.Shutdown：The battery charger enters into Standby Status if the input is active.2.Enable Battery Detection：The battery charger enters into Standby Status if the input is active but there is not battery voltage signal.3.Manual BOOST:The battery charger enters into BOOST if the input i
30、s active.4.12V system:if input is active,charger will be in 12V system.Aux.Input Port Delay 2.0s(060.0)s The corresponding action will be active if the input is active.Communication Address 10 1254 RS485 Communication Address Baud Rate 0(02)0:9600bps；1:19200bps；2:38400bps(One Stop Bit)5 PARAMETERS S
31、PECIFICATION Table 4 Product Parameters Items Contents Parameters 24V 12V Input Characteristics Nominal AC Voltage Range AC(100277)V Max.AC Voltage Range AC(90305)V AC Frequency 50Hz/60Hz Max.Active Power 736W 373W Max.Current 8.2A 4.2A Max.Efficiency 90%85%Power Factor Calibration AC 110V AC 220V A
32、C 110V AC 220V 0.99 0.97 0.99 0.97 Output Characteristics No-load Output Voltage 32V，Error1%16V,Error1%Rated Charging Current 20A，Error2%Max.Output Power 640W 320W Insulating Property Insulation Resistance Between input and output,input and shell all are DC1000V1min,insulation resistance RL50M Insul
33、ation Voltage Between input and output,input and shell all are:AC3000V 50Hz 1min,leakage current:IL3mA Between output and shell is:AC500V 50Hz 1min leakage current:IL3mA Working Condition Working Temperature(-30+55)C Storage Temperature(-40+85)C Working Humidity 20%RH93%RH(No condensation)Shape Stru
34、cture Weight 2.2kg Dimension 265mm156mm68mm(length*width*height)Fig.3 Efficiency Curve 6 OPERATION Fig.4 BACM2420A Mask Table 5 Wiring Connections Terminal Function Description L AC Input Terminals Connect terminals L and N to AC(100240)V;Bigger than BVR 2.0mm2 multi-strand copper line is recommende
35、d.N PE GND Terminals Connect to shell internally.A(+)RS485 Communication Port Standard RS485 serial communication interface B(-)MF Mains Failure Output Port It will output low level immediately when the AC input is interrupted.IN Auxiliary input port Low level is active.BV Battery Voltage Port Conne
36、ct to battery positive.COM Common Port COM port of BV and temperature acquisition terminal.Connect to battery negative.BT Temperature Sensor Port Connect to PT1000 sensor BLV Battery Low Voltage Alarm Output Port It will output low level when the battery voltage has fallen below the set value.B-Batt
37、ery Negative Connect to battery negative;Bigger than BVR 4mm2 multi-strand copper line is recommended.B+Battery Positive Connect to battery positive;Bigger than BVR 4mm2 multi-strand copper line is recommended.FULL CHARGED Green LED Indicator Full charged indicator.CHARGING Red LED Indicator Chargin
38、g status indicator.NOTE:1)Because there is diode and current-limiting circuit inner the charger,it can be used together with charging generator,and there is no need to disconnect the charger when cranking.2)During genset is running,high current will cause voltage drop in charging line,so recommend separately connecting to battery terminal to avoid disturbance on sampling precision.7 CONNECTION Fig.5 Wiring Diagram 8 CASE DIMENSIONS Fig.6 BACM2420A Installation Size _ Unit:mm