What Are The Chemical Energy Storage Batteries?

As energy consumption continues to intensify and become precious, the temporarily redundant energy is stored through a certain technology, and the development concept of release when it is needed is continuously improved, and the application of chemical energy storage batteries has emerged, so now What are the chemical energy storage batteries?

(1) Lead-acid battery: It is a battery whose electrodes are mainly made of lead and its oxides, and the electrolyte is sulfuric acid solution. At present, it is widely used in the world, the cycle life can reach about 1000 times, the efficiency can reach 30%-90%, and the cost performance is high. It is often used in the accident power supply or backup power supply of the power system. Disadvantages: If deep, fast and high-power discharge, the available capacity will decrease. It is characterized by low energy density and short life. Lead-acid batteries this year by adding super active carbon material to the negative plate of lead-acid batteries, its cycle life is greatly improved.

(2) Lithium ion battery: It is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. Mainly used in portable mobile devices, its efficiency can reach more than 95%, and the practical battery of discharge time is currently the most used. In recent years, technology has been continuously upgraded, and positive and negative materials have also been used in various applications.

The mainstream power lithium batteries on the market are divided into three categories: lithium drill batteries, lithium manganese batteries and lithium iron phosphate batteries. The former has high energy density, but the safety is slightly worse. The latter is the opposite. Domestic electric vehicles such as BYD currently mostly use lithium iron phosphate batteries. But it seems that foreigners are playing ternary lithium batteries and lithium iron phosphate batteries?

Lithium-sulfur batteries are also very hot. A battery that uses sulfur as the positive electrode and metallic lithium as the negative electrode. Its theoretical specific energy density can reach 2600wh/kg, and the actual energy density can reach 450wh/kg. However, how to greatly increase the charge-discharge cycle life and use safety of the battery is also a big problem.

Disadvantages: There are safety problems such as high price (4 RMB/wh), heat generation and burning caused by overcharging, and charging protection is required.