Construction Of An Intelligent 250 Volts Battery Charger With Micro Processor
Using Seven Segment Display
Title page i
Certification page ii
Table of content vi-vii
is Battery Charger 1
What is an Intelligent Battery Charger 1
Types of Battery Charger 2-3
Component Description 6
Segment Display 17-18
of Operation 23-27
WHAT IS A BATTERY CHARGER: A
battery charger is a device used to put energy into a secondary cell or
rechargeable battery. By forcing on electric current through it.
charge current depends upon the technology and capacity of the battery being
charged. For example, the current that should be applied to recharge a 12v car
battery will be very different from the current for a mobile phone battery.
WHAT IS AN INTELLIGENT BATTERY CHARGER: This
is a battery charger whose output current depends upon the battery’s state. An
intelligent charger may monitor the
battery’s voltage, temperature and/ or time under charge to determine the
optimum charge current at that instant. Charging is terminated when a
combination of the voltage, temperature and/or time indicates that the battery
is fully charged.
OTHER TYPE OF BATTERY CHARGERS
CHARGER: A simple charger works by connecting a
constant dc power source to the battery being charged. A simple charger does
not alter its output based on time or the charge on the battery. This
simplicity means that a simple charger is inexpensive but there is a trade off
BATTERY CHARGER: A trickle charger is a kind of simple charger
that charges the battery slowly, at the self-discharge rate. A trickle charger
is the slowest kind of battery charger.
The output of timer charger is terminated after a predetermined time. Timer
chargers were the most common type for high-capacity Ni-Cd cells in the late
fast chargers make use of control circuitry in the batteries being charged to
rapidly charge the batteries without damaging the cells element. Most such
chargers have a cooling fan to help keep the temperature of the cells under
some charger use pulse technology in which
a pulse is fed to the battery. This DC pulse has a strictly controlled rise
time, pulse width, pulse repetitive rate (frequency) and amplitude. This
technology is used to work with any size, voltage, capacity or chemistry of
batteries including automotive and valve-regulated batteries. .
Inductive battery chargers use electromagnetic induction to charge batteries. A
charging station sends electromagnetic energy through inductive coupling to an
electrical device which stores the energy in the batteries
BATTERY CHARGER: Since the universal serial bus specification provides
for a five-volt power supply, it is possible to use a USB cable as a power
source for recharging batteries.