Lithium battery introduction

　　1. The development of lithium batteries

　　In 1981, the first patent for lithium-ion batteries was published.

　　In 1992, SONY began mass production of lithium-ion batteries for civilian use.

　　In 1998, a large number of square lithium-ion batteries were put on the market, occupying a large market share.

　　In 1999, China began mass production of lithium-ion batteries.

　　Second, the classification of lithium batteries

　　The new energy vehicle drive motor system test bench adopts AC variable frequency feedback loading, and the loaded energy is fed back to the grid through the AC load generator; the torque and speed are directly measured by the torque sensor; the high-precision power analyzer detects current, voltage, frequency, power factor, etc.; computer Automatically detect, display and complete data processing, reports and various curves. The motor is used to measure the torque output on various power mechanical shafts, and combined with the speed to determine the power of the equipment. Because the measured power machinery may have different speeds, the motor used as an electric dynamometer must be a motor that can smoothly adjust the speed.

　　1. Classified by shape

　　Cylindrical lithium battery

　　Cylindrical lithium-ion batteries generally have a 5-digit model name. 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 a cylindrical shape and the unit is millimeters.

　　The most commonly used cylindrical lithium batteries:

　　18650 lithium battery

　　14500 lithium battery

　　18500 lithium battery

　　21700 lithium battery

　　26650 lithium battery

　　32650 (32700) lithium battery

　　Square lithium battery

　　The prismatic lithium battery usually refers to the aluminum or steel prismatic lithium battery, which is widely used in surveying and mapping, medical equipment, and portable testing equipment.