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News 2024年6月6日 12

In today’s technological wave, lithium batteries have become a shining star in the technology world with their excellent performance and wide application fields. Whether it is our mobile phones, laptops, electric cars, or drones, lithium batteries have brought great convenience to our daily life and work with their high energy density, long life and environmental protection characteristics.

1.The past and present of lithium batteries


To understand the models of lithium batteries, we first need to understand their origin and development. Since the first lithium-ion battery patent came out in 1981, lithium batteries have undergone a transformation from nothing to something, from weak to strong. In particular, in 1992, SONY began to mass-produce civilian lithium-ion batteries. This milestone event marked that lithium batteries officially entered our daily lives. Today, lithium batteries have become an indispensable part of our lives

2.Classification and models of lithium batteries

    Classification by chemical composition

    • Lithium-ion battery (Li-ion): This is the most common type of lithium battery on the market. Its positive electrode material is mainly composed of lithium cobalt oxide (LiCoO2), lithium manganese oxide (LiMn2O4), nickel cobalt aluminum (NCA) and other types. Lithium-ion batteries have the advantages of high energy density, long life and environmental protection, so they are widely used in fields such as mobile phones, laptops and electric vehicles.
    • Lithium iron phosphate battery (LiFePO4): This battery has high energy density and safety performance, so it has been widely used in new energy vehicles. The main advantages of lithium iron phosphate batteries are long cycle life and good thermal stability, but the energy density is relatively low.
    • Ternary lithium battery (NMC): This is a lithium-ion battery composed of three elements: nickel, manganese and cobalt. Ternary lithium batteries have high energy density and cycle life, but their performance may be affected in high temperature environments.
    • Nickel-metal hydride battery (Ni-MH): Nickel-metal hydride battery is a hydroxide battery whose positive electrode material is nickel hydroxide. Nickel-metal hydride batteries have good cycle performance and high energy density, but their cost is relatively high.
    • Lead-acid battery (Lead-acid): This is a traditional chemical battery whose positive electrode material is lead and the negative electrode material is lead paste. Lead-acid batteries have low cost and high reliability, but low energy density and poor environmental performance.

    Classification by appearance

    • Cylindrical lithium battery: The model name of cylindrical lithium-ion battery is generally 5 digits. The first two digits are the diameter of the battery, the middle two digits are the height of the battery, and the last digit 0 represents the cylindrical shape, which is in millimeters. For example, the common 18650 lithium battery has a diameter of 18mm and a height of 65mm.
    • Square lithium battery: Square lithium battery usually refers to square lithium battery with aluminum shell or steel shell, which is widely used in exploration and mapping, medical equipment, portable testing equipment and other fields. The shape of square lithium battery is more flexible and can be customized according to needs.
    • Classification by shellSteel shell lithium battery: Most early lithium-ion batteries are steel shell. The steel shell is heavy and has poor safety, but the stability of steel is strong. Later, many manufacturers optimized the design structure through safety valves, PTC and other devices, which greatly increased its safety performance.
    • Aluminum shell lithium battery: Aluminum shell lithium-ion battery has been widely used in modern mobile devices because of its lighter weight and slightly better safety than steel shell lithium-ion battery.