The Batteries – PART 4: Disposable Batteries – Continue
Today, we continue to explain the disposable Batteries.
The our focus will be around the dry cells, more precisely, the Zink/Carbon and alkaline batteries.
Let’s say few words for the Zink /Carbon dry cell. It was invented in 1866 by Georges Leclanché and it has a great popularity and nowadays, 150 years later.
The well-known, Zink/Carbon Dry Battery cell or the Leclanché element:
PIC. 1 Dry Zink/Carbon Single battery Cell.
Do You Know, how is looking inside the normal (not alkaline) 9V Dry Battery?
There are 6, serially connected elements, we call zink/carbon cells, and each one has the EMF equal to Ucell = 1.5V.
PIC. 2 Structure of 9V 6F22 Zink/Carbon battery pack
The single cell consists the following:
The Outer part, or the negative terminal is made by Zink, which inner side is covered by highly conductive layer made by Carbon and High-Active Molecular adhesive material. To this conductive layer is pressed the diaphragm from a porous material, impregnated and covered with an electrolyte with a gel consistency. Over this diaphragm has pressed the positive electrode, having the little bit complicated structure: Polyvinyl shield is carrying the mixture made by MnO2, Carbons and the Acetylene Black. The upper, more convex part from this complex positive electrode, is used to create the connection between the cells, when they are inserted and serially connected one each other into the battery pack.
That was an example of zink/carbon 6F22 9-Volt Battery .
Are you think, does the alkaline 6LR61 9-Volt Battery has the similar internal structure?
Maybe Yes or, probably No!
Or, perhaps, there will have a surprise!
Let we see.
Read carefully the Obligatory Safety Messages, written in RED:
“Never open the outer metallic protective cover of any kind of dry cell battery.”,
“Newer do this at home. Don’t use a sharp subjects. It can perforate the batteries.”,
“There are harmful to the human health and the environment chemicals and gasses inside.”.
But, if the curiosity prevail over reason, don’t forget: On open air place and use the safety Gloves, Mask, Protective Eyeglasses, etc. – on your own Risk.
After the any kind of experiment, the battery need to be given for recycling on a specific for that place.
Save the Environment !
It is our live !
Now we will try imaginary to uncover the metallic shield from the exhausted 9V Alkaline battery, you will see inside 6 discrete cells, smaller than a standard AAA size batteries and a bit shorter (3.55 mm shorter) then a standard AAAA LR8D425 battery cell, but looking in the same way. Now you have learnt the strange number written on battery package 6LR61 means 6 pieces of LR61 size battery cell.
PIC. 3 Compartment between the Alkaline and Zink/Carbon 9V Battery Internal Structure.
Next time, when you need a little 1.5V battery for your “Secret BUG Project”, you already know where the battery exists.
But, don’t forget the Obligatory Safety Messages!
Don’t Stop To Reinvent Yourself, Dear Explorers!
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