Design and Implementation of a on-board Device For

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


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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


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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


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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

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Design and Implementation of a on-board Device For