How long is the life of a lithium battery?

In 1746, Mason Brock of the University of Leiden in the Netherlands invented the "Leyden Bottle" for collecting electric charge. Because he saw that the electricity that was hard to collect was easily disappeared in the air, he wanted to find a way to save electricity. One day, he hung in the air with a barrel, connected with a motor and a barrel, and a copper wire was taken from the barrel and immersed in a glass bottle filled with water. He gave an assistant a Holding the glass bottle in hand, Mason Brock swayed the motor from the side. At this time his assistant accidentally touched the other hand with the barrel. He suddenly felt a strong electric shock and shouted. Mason Brock then exchanged with the assistant, letting the assistant shake the motor. He took the water bottle in one hand and the gun in the other.

In 1780, the Italian anatomist Luigi Galvani, while doing frog anatomy, held different metal instruments in both hands, accidentally touching the frog's thighs at the same time. The muscles of the frog's legs immediately twitched as if they were subjected to the stimulation of the current, and if only a metal device is used to touch the frog, there is no such reaction. Galvani believes that this phenomenon occurs because of a kind of electricity generated inside the animal's body, which he calls "bio-electricity."

The discovery of Galvani has aroused great interest among physicists who are competing to repeat the experiment of sputum in an attempt to find a way to generate electricity. The Italian physicist Volt said after several experiments: Galvani The term "bioelectricity" is not correct. The reason why the muscles of the frog can produce electricity is probably that some kind of liquid in the muscle is working. To demonstrate his point of view, Volt immersed two different metal sheets in various solutions for testing. As a result, it was found that as long as one of the two metal sheets chemically reacted with the solution, current could be generated between the metal sheets.

In 1799, the Italian physicist Volt dipped a zinc plate and a tin plate in salt water and found that a current was passed through the wires connecting the two metals. Therefore, he put a lot of fluffed cloth or paper sheets soaked in salt water between the zinc sheets and the silver sheets. When you touch both ends by hand, you will feel strong current stimulation. In this way, Volt succeeded in making the world's first battery, the "Volt Stack." This "volt stack" is actually a battery pack in series. It became an early electrical experiment, the power of the telegraph machine to the battery source.

In 1836, Daniel of the United Kingdom improved the "Volt Stack". He used dilute sulfuric acid as the electrolyte to solve the problem of battery polarization, and produced the first zinc-copper battery that was not polarized and could maintain a balanced current. Since then, these batteries have a problem that the voltage decreases with the use of time.

When the voltage drops after the battery is used for a period of time, it can be given a reverse current to make the battery voltage rise. Because this battery can be recharged, it can be used repeatedly, so it is called "battery".

Also in 1860, France's George Leclanche also invented the predecessor of the world's widely used battery (carbon zinc battery). Its negative electrode is an alloy rod of zinc and mercury (the negative electrode of a zinc-volt prototype battery, which proves to be one of the best metals for the negative electrode material), and its positive electrode is a crushed two in a porous cup. a mixture of manganese oxide and carbon. A carbon rod was inserted into the mixture as a current collector. Both the negative electrode rod and the positive electrode cup were immersed in an ammonium chloride solution as an electrolytic solution. This system is called a "wet battery." The battery made by Lakeland was simple but cheap, so it was not until 1880 that the "dry battery" was replaced. The negative electrode is modified into a zinc can (the outer casing of the battery), and the electrolyte becomes a paste rather than a liquid, which is basically the carbon zinc battery that we now know.

In 1887, the Englishman Hellerson invented the earliest dry battery. The electrolyte of the dry battery is paste-like, does not leak, and is easy to carry, and thus has been widely used.

In 1890, Thomas Edison invented a rechargeable iron-nickel battery.

Battery means a space in a cup, tank or other container or composite container containing an electrolyte solution and a metal electrode to generate electrical current, a device capable of converting chemical energy into electrical energy. It has a positive electrode and a negative electrode. As technology advances, batteries are broadly referred to as small devices that generate electrical energy such as solar cells. The performance parameters of the battery mainly include electromotive force, capacity, specific energy and resistance. Using battery as energy source, stable voltage, stable current, stable power supply for a long time, little external influence, and simple battery structure, easy to carry. Charge and discharge operation is simple and easy, not affected by the outside climate and temperature, stable and reliable performance, in modern social life in all aspects play a great role.

Lithium batteries have a service life of only two to three years.

Lithium batteries are generally capable of charging and discharging 300-500 times. It is best to partially discharge the lithium battery instead of completely discharging it, and try to avoid frequent full discharges. Once the battery is off the production line, the clock begins to move. Lithium batteries last for only two to three years, whether you use them or not.

A "lithium battery" is a type of battery using a lithium metal or a lithium alloy as a negative electrode material and using a nonaqueous electrolyte solution. Lithium metal batteries were first proposed and studied by Gilbert N. Lewis in 1912. In the 1970s, MS Whittingham proposed and began researching lithium-ion batteries. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal are very demanding on the environment. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have become the mainstream.

Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium-ion batteries do not contain metallic lithium and are rechargeable. The fifth-generation lithium-metal battery of rechargeable batteries was born in 1996, and its safety, specific capacity, self-discharge rate and performance price ratio are better than lithium-ion batteries. Due to its own high technical requirements, only a few companies in the country are producing such lithium metal batteries.

1. Shelf life refers to the period of time from the production of the product to the general quality of the product. It is also possible that some of the product quality will remain normal after the time period, so there is uncertainty. Buyers are passive during the warranty period.

2. Validity period means that certain items (things) can be used or made within a certain period of time, with a clear time limit. The user has the initiative during the validity period.

3, the battery generally prints the shelf life, instead of writing the date of manufacture, should be estimated from the shelf life of the factory time, such as "02-01" valid period is February 2001, generally:

(1) The shelf life of alkaline batteries is 3 years;

(2) The shelf life of the P-type battery is 2 years;

(3) The shelf life of ordinary batteries is 1 year;

(4) Foreign brands print more shelf life than domestic brands for 1-2 years, so the above different types of batteries should be added.

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