DESIGN AND CONSTRUCTION OF A 6 VOLT LEAD AGD ACCUMULATOR
ABSTRACT
This research work was done under a laboratory condition. During the course of this study, comprehensive literature survey or review of 6 Volt Lead Acid Accumulator was made.
The material used like grid plates of lead, terminals, Perspex container used was sourced out locally from scars cells. The dilute sulphric acid (H2S04) used was diluted with distilled water.
The constructed accumulator was then tested by filling with, dilute sulphric Acid of specific gravity of 1.25, charging it in the usual way and then using it to supply current is an external circuit it’s emf which was about 6.3 volts was found to be fairly steady for a good number of days thus indicating that it compares favourably with those manufactured under factory conditions. It’s internal resistance was also found to be low and is about 0.7ohms.
1.0Introduction 1
1.1 Statement of Problem 2
1.2 Aim and Objective of the Project 2
1.3 Limitation of Study 3
1.4 Working Principle of a Cell 3
1.5 Electrochemistry 4
1.6 Thermodynamics of Electrochemical Cell 5
1.7 Electromotive Force (emf) 6
CHAPTER ONE
CHAPTER TWO
1.0Literature review 8
2.1 Simple Voltaic Cell 11
2.2 Lechlanche Cell (Wet and Dry) 27
2.3 Storage Cell Summary 30
2.4 Chemical Changes 34
2.5 Design and construction of a 6 – volt lead – acid accumulator
(battery) 37
2.6 Properties of Components of the Battery 41
2.7 Applications of lead – Acid Batteries 45
2.8 Maintenance of Lead Acid Cells 46
CHAPTER THREE
2.0Methodology 47
3.1 materials/Chemicals 47
3.2Active Materials of a Lead Acid Cell 48
3.3.0Electrodes 49
3.4.0Construction of the Casing or the Container 51
3.5.0Forming Process for Pasted Plates 55
3.6.0Construction of the Cells 55
3.7.0Positioning of the Cells 56
3.8.0Construction of the two Terminals 57
3.9.0Sealing of the Surface of the Container 57
