3165

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Siddhartha B N & I Mukhopadhyay

B. TECH FINAL PROJECT PRESENTATION 2013-2014

Sunil Kumar Sahu (EIE201010178) & Asish Kumar Gouda (EIE 201018112)

PROJECT ID - 3165

ASISH KUMAR GOUDA Roll # EIE 201018112SUNIL KUMAR SAHU Roll # EIE 201010178

Battery Management System Using LabVIEW

Under the guidance of Mr. Satyabrata Das

PRESENTED BY

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Contents 1. Introduction

2. Initial Preparation

3. Serial communication

4. RS-232 Standard

5. DB 9 PIN CONNECTOR

6. TEMPERATURE SENSOR (LM35)

7. MAX 232

8. POWER SUPPLY

9. PIC16F877A(40/44-Pin Enhanced Flash Micro controllers)

10. HARDWARE DIAGRAM

11. LabVIEW CODE(BLOCK DIAGRAM)

12. LabVIEW CODE(FRONT PANNEL )

13. Conclusion

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Introduction

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• This project deals with developing a universal battery management system that can read battery voltage, current and temperature. The two major components of the system are hardware and software. The software uses LabVIEW as a platform to interface with the hardware for data acquisition.

• The LabVIEW GUI is primarily divided into two portions, the block diagram and the front panel. The block diagram allows the user to perform various graphical coadings. The display panel presents the experimental data on a waveform.

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Initial Preparation

1. Install the Lab-VIEW software on to the PC with all the tool kit and device drivers.

2. Activate the Lab-VIEW using key and check for the installed tool kits.

3. Initialize the serial port using dedicated links and pallets.

4. Connect the hardware devices and select appropriate communication port.

5. Switch on the hardware and play the software.

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Serial communication

Transmits data between a computer and a peripheral

device, such as a programmable instrument or another

computer.

Uses a transmitter to send data one bit at a time over a

single communication line to a receiver.

Best method when data transfer rates are low, or you

must transfer data over long distances

Most computers have one or more serial ports, so you

do not need any extra hardware other than a cable.

Serial Communication

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RS-232 Standard

Limited to point-to-point connections between PC serial ports and devices. The RS

232 standard defines different voltage level corresponding to Logic 1 & Logic 0.

Logic 1 is defined as negative voltage & Logic 0 is defined as positive voltage.

Valid voltages are in range of plus or minus 3 to 15 Volts for Logic 0 & Logic 1.

correspondingly.

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The DB9 (originally DE-9) connector is an

analog 9-pin plug of the D-Sub miniature

connector family (D-Sub or Sub-D). The

DB9 connector is mainly used for serial

connections, allowing for the asynchronous

transmission of data as provided for

standard RS-232 (RS-232C).

DB 9 PIN CONNECTOR PIN DESCRIPTION:

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The LM35 are precision integrated-circuit

temperature sensors, whose output voltage

is linearly proportional to the Celsius

(Centigrade) temperature. The LM35 does

not require any external calibration. It can

be used with single power supplies, or with

plus and minus supplies. As it draws only

60 μA from its supply, it has very low self-

heating. The LM35 is rated to operate over

a −55° to +150°C temperature range.

TEMPERATURE SENSOR (LM35)

Basic Centigrade Temperature Sensor (+20C to +1500)

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9

MAX 232The MAX232 is an integrated circuit that converts signals from an RS-232 serial

port to signals suitable for use in TTL compatible digital logic circuits. The MAX232

is a dual driver/receiver. C3

C4DB9-connectorMicro-controller

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POWER SUPPLYAll digital circuits require regulated power supply. Here we are going to learn how

to get a regulated positive supply from the main supply.

Transformers convert AC electricity from one voltage to another with a little loss

of power. Most power supplies use a step-down transformer to reduce the

dangerously high voltage to a safer low voltage. Voltage regulator is a device

which converts varying input voltage into a constant regulated output voltage.

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PIC16F877A(40/44-Pin Enhanced Flash Micro controllers)

• PIC16F877A devices are available in 40-pin

and 44-pin packages.

• 40/44-pin devices have five I/O ports.

• The 40/44-pin devices have fifteen

interrupts.

• The 40/44-pin devices have eight A/D input

channels.

• The Parallel Slave Port is implemented only

on the 40/44-pin devices.

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HARDWARE DIAGRAM

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LabVIEW CODE(BLOCK DIAGRAM)

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LabVIEW CODE(FRONT PANEL)

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CONCLUSION

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1. A battery management system is essentially the “brain” of a battery pack;

it measures and reports crucial information for the operation of the battery

and also protects the battery from damage in a wide range of operating

conditions.

2. The most important function that a battery management system performs

is cell protection.

3. Lithium ion battery cells have critical design issues; if you overcharge

them you can damage them and cause overheating and even explosion,

so it's important to have a battery management system to provide

overvoltage protection .

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16

3165

Documents

asish kumar gouda roll

sunil kumar sahu roll

serial communication

hardware diagram

project deals

hardware devices

battery voltage

experimental data