Seawater battery

Abstract

A seawater battery has cathode and anode isolated from each other. Said anode is made of Mg-alloy. Said cathode is a nno-soluble electric conducting substrate modified by AgCl, CuCl2, AgO, Ag2O, or electrically conductive high-molecular film. Its advantages are simple structure, high weight, small size, high working current, and high environment protection effect.

Description

technical field [0001] The invention relates to battery technology, in particular to a seawater battery. It is mainly used as a power supply for electronic equipment working in seawater areas or other salt water waters. Background technique [0002] Electronic equipment working at sea or in other saline waters, such as marine buoys, hydrometeorological buoys, underwater detectors, diving power machines, etc., need to use batteries as power supplies to provide energy; the existing widely used batteries include manganese-zinc dry batteries, Alkaline batteries, lead-sulfuric acid rechargeable batteries, air-zinc batteries, etc. The first three batteries all contain toxic mercury, lead, highly corrosive KOH and sulfuric acid, etc., which will cause environmental pollution during the manufacturing stage and after use, and have relatively low output power. Small size, large capacity-to-volume ratio, large capacity-to-weight ratio, and rapid storage fai...

AI Technical Summary

Problems solved by technology

In order to develop a battery suitable for use in seawater, the Chinese Utility Model Patent Application No. 96206163 provides "a seawater battery". The battery uses seawater as the electrolyte, and the cathode plate of the battery is installed above the water level, using oxygen in the air as the cathode. The metal anode plate is installed below the water level, and the distance from the cathode plate to the water level is filled with sponges and other water-absorbing substances. The positive and negative ions reach the positive and negative plates respectively through the seawater electrolyte absorbed in the sponge for chemical reaction. The reaction generates electric current for use by electrical appliances; the waterproof process of this seawater battery is relatively complicated, and because the battery needs oxygen in the air as a depolarizer, the battery must be connected to the atmosphere, so the working range is limited

In order to overcome the shortcomings of this type of metal-air-seawater combined battery, the Chinese utility model patent No. 95212257 provides a "water dissolved oxygen battery". This battery uses seawater as the electrolyte and uses a large area of ​​mesh Metal or other conductive materials are used as the cathode of the battery, dissolved oxygen in water is used as the cathode depolarizer of the battery, and aluminum, magnesium, zinc and their alloys are used as the anode of the battery; although this battery can be applied to wider fields, But its cathode efficiency is extremely low, and the generated current density is 300mA / m 2 Or so, in order to meet the needs of high current, its effective area has to be designed as 5 to 50 times that of the anode, so the battery volume is quite large, and it is not suitable for underwater power supply and sea rescue, etc., which require small size and high current. combine

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