What Is A Dry Cell?
"Dry Cell" is a common name for a particular design of hydrogen electrolyzer, or HHO generator. The name sometimes confuses people because it still uses electrolyte in water like any other electrolyzer. But it has some properties that make it a better design, and we will show you how these properties could bring about the name of "dry cell". Perhaps a better name could have been found for this design, but it's pretty clear that the name is here to stay.
With the dry cell design, the whole cell is not submerged into an open bath of electrolyte as all other common types of HHO generator are. Instead, the dry cell's plates are separated by rubber (or similar material) gaskets, and the electrolyte is confined inside those gaskets. The edges of the plates, including all of the electrical connections are outside of the electrolyte bath. Here is an image of one of our cells that will help illustrate this:
You can see the edges of the plates between the black gaskets. What is not so clear in this picture is how the electrical connections to the plates are also outside of the electrolyte bath. But they are. Tabs on the plates are used to make the electrical connections. These are the only parts that are dry, and rightly or wrongly, give the dry cell its name.
In order to get electrolyte in to the cell plates, and to let the gas get out, the cell plates have holes in them. There are holes at the top of each plate, so that the HHO gas can pass from between the plates to the outer sides of the cell. Similarly, there are holes at the bottom of each plate to allow the electrolyte to circulate. The following photos show where the gas and electrolyte are connected to the cell. The upper fitting allows the HHO to get out of the cell, and the lower fitting is for replenishing electrolyte.
So to summarize, the points that make a design a "dry cell", are that the edges of the plates and the electrical connections to the plates are dry, or are outside of the electrolyte bath. That's basically all there is to it.
Advantages Of A Dry Cell
So, what's all the commotion about? Why is this a better design? There are 2 main reasons:
So that's a "Dry Cell". It is a very simple concept. There are still a great many variations in this design from manufacturer to manufacturer. Number of plates, how the plates are powered, and how much voltage is applied from plate to plate, are just some of the parameters that can vary. But if they are dry cells they have the qualities described in this article.