The working principle of dry batteries, can dry batteries be rechargeable?

The working principle of dry batteries, can dry batteries be rechargeable? Dry batteries are primary batteries in chemical power sources and are a kind of disposable batteries. Because the chemical reaction of dry battery discharge is irreversible, it cannot be charged. If it is charged with high current, it may catch fire and explode. Charging with low current will cause the battery to rupture, smoke, and leak. Are dry batteries rechargeable? Dry batteries are disposable batteries, that is, common carbon batteries, alkaline batteries, the internal chemical reaction is converted into electrical energy, irreversible, there are safety hazards in charging, or it may explode, the manual also says that the general dry battery is Zinc-manganese dioxide system. This system cannot be charged and should be discarded directly, as there is a danger of explosion when charging directly. In an emergency, Charcoal can try to do this: perforate the battery, and then inject saturated sodium chloride salt water into it, which can slightly extend the service life. Dry batteries cannot be recharged. After we have used up the power, we cannot recharge them for secondary use, because our common acid batteries cannot undergo a reduction reaction when the energy in it is completely released. If the battery cannot be charged, then it must not be charged, otherwise the battery may explode and endanger personal safety. The working principle of dry cell Dry cell is a chemical battery that uses paste electrolyte to generate direct current (wet battery is a chemical battery that uses liquid electrolyte). It is a primary battery and is commonly used in daily life, and Lightweight battery. It can be used in many electrical appliances. The self-made batteries in the laboratory can be used. Ordinary dry batteries are mostly manganese-zinc batteries, with a positive carbon rod in the middle, a mixture of graphite and manganese dioxide outsourcing, and a layer of fiber mesh on the outside. The net is coated with a thick electrolyte paste, which is composed of ammonia chloride solution and starch, and a small amount of preservatives. The main working principle of the dry battery is that the oxidation-reduction reaction is realized in a closed circuit. The dry battery is a primary battery in the chemical pole power supply. It is a kind of disposable battery. Its carbon rod is used as the positive electrode, and the zinc cylinder is used as the negative. Supply external circuit. In the chemical reaction, because zinc is more active than manganese, zinc loses electrons and is oxidized, while manganese gets electrons and is reduced. Dry battery discharge is the electrolysis reaction of ammonium chloride and zinc. The charge released is conducted by graphite to the positive carbon rod. The electrolysis reaction of zinc will release hydrogen gas, which will increase the internal resistance of the battery. The manganese dioxide mixed with graphite is used to absorb hydrogen. But if the battery works continuously or is used for too long, the manganese dioxide will be too late or nearly saturated and unable to absorb it. At this time, the battery will lose its function due to too much internal resistance and too little output current. But at this time, if the battery is heated or left for a period of time, the accumulated hydrogen gas inside it will be heated or slowly released, and the manganese dioxide will also be restored and restored, then the battery will be vigorous again! Dry batteries are not only suitable for flashlights, semiconductor radios , Radio cassette recorders, cameras, electronic clocks, toys, etc., but also suitable for various fields in the national economy such as national defense, scientific research, telecommunications, navigation, aviation, medicine, etc., very easy to use. How to distinguish the advantages and disadvantages of dry batteries 1. Check for dry batteries with good appearance. The packaging will indicate the trademark, manufacturer, battery model, nominal voltage, battery polarity, production date, shelf life, implementation standard number, and the workmanship is exquisite, clean and tidy. There is no leakage. At the time of purchase, you can also check whether the goods are marked with the words'no mercury', '0% mercury', and'no mercury added'. 2. Look at the identification dry batteries are divided into alkaline and carbon. Alkaline dry batteries are marked with 'alkaline' or 'ALKALINEAlkaline batteries are much higher than carbon batteries in terms of capacity, shelf life, and reliability. If the dry battery is not properly handled after use, it will cause irreversible pollution to the environment. Therefore, after using the dry battery, you must recycle the battery instead of losing it everywhere. 3. Weigh dry batteries of the same brand and specifications, which can be weighed on an electronic scale. A good quality battery is much heavier than a poor quality battery. For example, the AA battery in the alkaline battery generally weighs about 23 grams, and the AA battery generally weighs about 11 grams. While the No. 5 carbon battery weighs about 16 grams, the alkaline battery in the hand is significantly heavier than the carbon battery. 4. Look at the high-priced dry batteries, which are generally alkaline batteries with relatively better quality. Don’t try to buy batteries cheaply from unlicensed and unlicensed vendors. These batteries are not only short-lived, but also have potential risks of leakage and environmental pollution. The above is an introduction to the working principle of dry batteries. Dry batteries cannot be charged. You must pay attention! Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: How to repair the motorcycle battery, how to add distilled water when the motorcycle battery is dead