Analyze the classification and application of lithium-ion batteries

Analyzed the classification and application of lithium-ion batteries, such as lithium-ion batteries for electric vehicles, the current market prospects are very optimistic: the batteries mentioned here are mainly primary batteries and secondary batteries. The primary battery is a disposable battery, and the secondary battery is a battery that can be used multiple times. Secondary batteries are also called rechargeable batteries or accumulators. Unless otherwise specified, the following batteries refer to secondary batteries. Classification of secondary batteries: Here we mainly list several batteries, such as lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and lithium-ion batteries. There are many performance parameters of secondary batteries, including the following four indicators: working voltage: the platform voltage on the battery discharge curve. Battery capacity: Commonly used units are ampere hour (Ah) and milliampere hour (mAh). (3) Operating temperature zone: the temperature range within which the battery is normally discharged. (4) Cycle life: the number of times the battery is charged and discharged during normal operation. The performance of secondary batteries can be represented by battery characteristic curves, including charge curves, discharge curves, charge-discharge cycle curves, temperature curves, and storage curves. The safety of the secondary battery can be evaluated through a specific safety test. Secondly, the specification of lithium-ion batteries is important for 18650 lithium-ion batteries. Regarding that the secondary battery can be used repeatedly and conforms to the principle of economy and practicality, this is the biggest advantage of the secondary battery, and naturally people prefer the secondary battery. From the perspective of the types of secondary batteries, the current mainstream products in the market mainly include lead-acid batteries, nickel-cadmium batteries, nickel-hydrogen batteries and lithium-ion batteries. The chemical power source is mainly composed of positive electrode, negative electrode and electrolyte. During the operation of the secondary battery, both the positive and negative reactions are reversible. Therefore, after the secondary battery is used, it can be charged with a charger to restore the active materials of the two electrodes of the battery to the initial state, so that the battery has energy to discharge again. An important feature of secondary batteries is repeated charging and discharging. When the secondary battery is charged, the electrical energy is converted into chemical energy, which is stored in the lithium polymer battery, and the heat is released. When the secondary battery is working, chemical energy is converted into electrical energy, which supplies power to the load, and is accompanied by a heat absorption process. Although the battery reaction always involves heat transfer, heat exchange is often ignored in the actual battery reaction formula, because the change of material composition is concerned during the charging and discharging process of the secondary battery. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it. Previous article: Why do lithium-ion batteries heat up and burn?