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The water activated battery is a popular battery for many devices used in the oceanic field. It meets the needs for a high energy density, long shelf life battery with good low temperature performance. Those characteristics make the water activated battery an excellent choice for military as well as commercial applications. Today, our batteries are ready to serve you to produce the power you require when you need it.

    The two most widely used chemistries in water activated batteries are Magnesium Silver Chloride, Cuprous Chloride Magnesium. The two chemistries are different in the materials they use to develop voltage. They are the same in many respects: all of these use dry elements in their battery; there is no electrolyte in the battery until it is immersed in the water. We have developed our batteries to activate in salt water as well as fresh water. This water can either be brought to the battery or the battery can be brought to the water. The batteries can be stored for years and them activated in milliseconds. As long as the batteries remain sealed they have indefinite shelf life. This means a very low maintenance cost. All three are very stable. This means that there is no chance of explosion as in some other battery chemistries. This is extremely important in a closed compartment of a ship or submarine where people could be working and there is no direct path of escape. Water activated batteries are of course, "one shot" batteries because the chemical reaction that delivers the voltage is not reversible.

    These battery chemistries can be used in submerged applications or in an "in air" type application. This "in air" application involves using a water absorbent wick as a separator between the anode and the cathode. The battery is immersed in the water for a period of time and then removed. The absorbent material retains sufficient water to complete the discharge of the battery. An important advantage of these systems over other types of chemistries is that no prepared electrolyte needs to be carried within the battery prior to activation, thus a weight saving is realized.

    As you can see seawater activated batteries are used for many applications such as torpedo propulsion, torpedo activation, powering sonobouys, Powering submarine rescue transmitters, and air rescue equipment. These duties demand the utmost reliability, long shelf life, speedy activation and high energy density. Water activated batteries are reliable, easy to handle and store, and have the following general characteristics:

bulletINDEFINITE SHELF LIFE IN DRY CONDITIONS
bulletSTORAGE RANGE: -40 DEG C TO +70 DEG C
bulletFAST ACTIVATION TO WORKING VOLTAGE
bulletRELATIVELY FLAT DISCHARGE PROFILE
bulletNO REQUIREMENTS FOR A SWITCH
bulletHIGH ENERGY DENSITIES

 

 

 

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Last modified: 05/29/13