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一个简单的纽扣电池制作

2018-4-22 14:42| 发布者: dymodel| 查看: 470| 评论: 0|原作者: culture

摘要: 一个简单的纽扣电池 A Simple Coin Battery This is probably a bit basic for this crowd, but I thought I would post this here in case someone wanted to use it for something.Although I don't think the e ...
一个简单的纽扣电池
A Simple Coin Battery
This is probably a bit basic for this crowd, but I thought I would post this here in case someone wanted to use it for something.  Although I don't think the experiment is particularly dangerous, perform it at your own risk.
A couple of weeks back I was discussing power and energy with my son, who is 13 years old.  We were discussing how batteries work and I thought I would make a simple battery from raw materials available in the home to illustrate the idea.  It worked out rather well, so I thought I would redo the experiment and document it for anyone wishing to do something similar.  

We use batteries for all kinds of things, but where do they come from?  How do they work?  They start our cars, power our portable phones and electronic gadgets, remote controls, and computers but what do you really know about them?  

First a brief history of batteries.  It turns out that electrochemical batteries might be older than our recorded history.  In the 1930's archeologists uncovered terracotta jars near Baghdad, Iraq, from about 2000 years ago which some scientists believe might have been a form of primitive early battery, although there is debate about the exact purpose and function of the artifacts.  If these were used as batteries, the facts and uses of it were lost to history.  
Much later, in Europe in the mid 1700's, scientists discovered they could store charge in a primitive capacitor made of a glass jar lined with metal foil on both the inside and outside surfaces.  A charge could be built up and stored sufficient to give quite a shock by applying voltage across the foil layers which were separated or insulated from each other by the glass of the jar.  These primitive devises were named Leyden Jars, after the University of Leiden in the Netherlands, one of the places it was discovered.  Several jars could be connected together to store more energy.
The American inventor, Benjamin Franklin, coined the term Battery apparently after seeing and using Leyden jars connected together and being reminded of several cannons being grouped together which were known as a battery of cannon.  
In 1800 an Italian scientist by the name of Alessandro Volta made the first battery of relatively modern times.  His first battery consisted of stacks of dissimilar metals separated by an electrolyte piled one on top of the other.  It was known as a Voltaic Pile.  The term Volt a term for the unit of electromotive force, or potential difference is named after Volta in honor of his scientific achievements.  This experiment is going to be similar to some of his early work from around 1800.  Other inventors tried variations where the plates made of various metals were suspended in various electrolytes.
纽扣电池
纽扣电池



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