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8/18/2019 Design and Implementation of a on-board Device For
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DESIGN AND IMPLEMENTATION OF A ON-BOARD DEVICE FOR
PHOTOVOLTAIC PANELS MONITORING
8/18/2019 Design and Implementation of a on-board Device For
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AIM:
A cost efficient pv charge controller with the function to disconnect and reconnect battery and
load during battery over charging or under discharging. This project deals with the design of an
intelligent charge controller.
PURPOSE:
Off-grid photovoltaic electrical systems, such as those found in remote areas are typically
equipped with battery storage systems in order to provide power at night and during overcast
days. Such systems must use charge controllers to prevent batteries from ecessive overcharge.
!revent the battery from damage due to over-charging and over-discharging .And to disconnect
and reconnect battery and load during batter overcharging or under discharging.
BLOCK DIAGRAM:
POWER SUPPLY:
Step Down
T!n"#o$e
B%&'e
Re(t%#%e
F%)te
C%(*%t
Re'*)!to
"e(t%on
8/18/2019 Design and Implementation of a on-board Device For
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DESCRIPTION:
"enerally, charge controller is divided into # main portions, which are microcontroller, input
parts and output parts. The input parts for the charge controller are temperature sensing circuit,
current sensing circuit and battery voltage sensing circuit. They are used to detect the voltage and
temperature of the circuit and send the data to the microcontroller to analy$e and microcontroller
will operate according to the program written inside its memory.
%or the output part, it consists panel-battery connect & disconnect circuit, sources load connect &
disconnect circuit, '() module, low voltage warning circuit, status indicator circuit
MICRO
CONTROLLER
AT+,S.
POWER SUPPLYLCD
TEMPERATURE
SENSOR
VOLTAGE
SENSOR
A
D
C
LED
BU//ER
SOLAR PANEL
LOADS
CURRENT
SENSOR
8/18/2019 Design and Implementation of a on-board Device For
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(ircuit power at *+ is derived from a * voltage regulator connected to the battery.
/attery voltage is sensed across a potential divider which dropped it to less than *+ and a '0) is
used to give warning when this was low. A temperature sensor sensed the ambient temperature
and '() is used to display the system status. And depending upon the remaining battery status
we can predict the power we have to run the vehicle.
SOFTWARES:
0mbedded (
102' micro vision
0press !(/
HARDWARES:
• 3icro controller
• Temperature sensor
• +oltage sensor
• (urrent sensor
• '()
• '0) 2ndicator
• 'oad (ircuit
• /attery
RESULT:
2n this study, the application of microcontroller with improved algorithm of etended
specifications has enhanced the efficiency of the charge controller as well as simplifies the
circuit of the charge controller