Lithium batteries are also divided into two categories: non-rechargeable and rechargeable. Non-rechargeable batteries are called disposable batteries, which can only convert chemical energy into electrical energy at one time, and cannot restore electrical energy back to chemical energy (or have extremely poor reduction performance). The rechargeable battery is called a secondary battery (also called a storage battery). It can convert electrical energy into chemical energy for storage, and then convert chemical energy into electrical energy when it is used. It is reversible, such as the main feature of electrical energy chemical energy lithium batteries.
Pay attention to fire prevention when using lithium batteries. Many people may only be familiar with lithium batteries from mobile phones. In fact, it is used in many home appliances. Undoubtedly, the advantages of lithium batteries, such as high efficiency, light weight, etc., are rapidly promoting their applications. However, do you know that if you use it carelessly, it will also make you "fire" on your upper body?
Lithium batteries have the advantages of light weight, high efficiency, and low temperature resistance (-40℃). The 0.3mm thick and stamp-sized lithium batteries can be used continuously for more than 5 years. In recent years, the current alkaline dry batteries and manganese batteries are gradually being phased out. Used in many high-end home appliances and mobile phones.
Lithium batteries are different from the zinc chloride and potassium hydroxide water-soluble electrolytes of the current manganese batteries and alkaline dry batteries. They use organic solvents. The positive electrode of lithium battery uses materials such as manganese dioxide, lead fluoride, and sulfurous chloride. Compared with the zinc chloride used in the negative electrode of general batteries, the lithium metal foil used in the negative electrode has a strong ionization tendency and a large difference in voltage between the positive and negative electrodes, which improves the working efficiency of the lithium battery.
However, lithium batteries often generate heat and combustion during use. The lighter ones will affect the use of the host, and the more serious ones will burn the host and cause a fire. According to reports, there have been many domestic fire accidents caused by heating and burning of lithium batteries in Japan in recent years.
Then why do lithium batteries generate heat and burn? When many materials in lithium batteries come into contact with water, they can undergo violent chemical reactions and release a large amount of heat to cause heating and burning. The manganese dioxide in the positive electrode of a lithium battery can generate heat with only a small drop of water. After the sulfur chloride in the lithium battery comes into contact with water, it generates hydrochloric acid and sulfur dioxide and releases heat at the same time. Several factors make the lithium battery a "fire" in life. Therefore, people must pay attention to waterproof and waterproof when using lithium batteries. Damp. After various hosts are out of service, the lithium battery should be removed and stored in a dry, low-temperature place for safekeeping to prevent and avoid domestic fire accidents caused by improper use of lithium batteries.