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  1.  Basic introduction of lithium-ion button battery Button lithium -ion battery is a rechargeable battery that uses lithium ions as charge carriers. It consists of positive electrode, negative electrode, electrolyte and diaphragm. The positive electrode usually uses lithium compounds, such as lithium cobalt oxide , lithium iron phosphate, etc. The negative electrode generally uses graphite material. The electrolyte is an organic solution containing lithium salts that can provide a medium for ion transmission. The diaphragm is used to isolate the positive and negative electrodes to prevent short circuits.

Button battery 1 . Basic Introduction Lithium-ion button batteries are mainly composed of the following parts: positive electrode shell, negative electrode shell, (positive/negative) electrode sheet, diaphragm, gasket, spring, and electrolyte.  The C in the commonly used regular commercial button battery CR2032 indicates that the positive electrode is MnO2, and there is also a BR series, and B indicates that the positive electrode is carbon fluoride. C or B represents the button battery system, and R represents that the battery shape is round.

1. About Button cells, also known as coin cells or battery cells, are compactly designed batteries shaped like small buttons. They are widely used in various small electronic devices, such as car keys, TWS wireless earbuds, watches, calculators, hearing aids, and some medical devices and precision electronic instruments. Their characteristics include a small size and light weight, making them ideal for applications where space is limited.

1. Introduction A full cell is a complete battery system that includes a positive electrode, a negative electrode, a  separator , an  electrolyte , and a shell. Unlike a half-cell, a full cell can provide an accurate assessment of the electrochemical and mechanical properties of an actual battery when it is in operation. A half-cell usually uses a metal sheet or foil (such as a lithium sheet or foil) as a counter electrode, while a full cell consists of two active electrodes, one as the positive electrode and the other as the negative electrode. The design and assembly of a full cell need to consider a variety of factors, including the choice of electrode materials, the type of electrolyte, the properties of the  separator , and the structure of the battery shell to ensure the performance, safety, and reliability of the battery . Full cell testing is usually used to evaluate the degree of match between the positive and negative electrode materials and the r...

  1. The Charging and Discharging Modes of Button Cells The charging and discharging tests of button lithium batteries typically use constant current charging (CC), constant current-constant voltage charging (CC-CV), constant voltage charging (CV), and constant current discharging (DC) to test and analyze the battery's charging and discharging behavior. By analyzing the data changes during this process, various electrochemical performance parameters of the battery or material, such as capacity, coulombic efficiency, charging and discharging plateau, and internal parameter variations, can be characterized.

  1. Basic Introduction to Coin-Cell Batteries Lithium-ion coin-cell batteries are mainly composed of the following parts: positive shell, negative shell, (positive/negative) electrode sheets, separator, gasket, spring, and electrolyte. Commonly used coin-cell batteries include CR2032, CR2025, CR2016, etc. "C" represents a coin cell type, and "R" indicates the battery shape is round. The first two digits represent the diameter (in mm), and the last two digits represent the thickness (in 0.1 mm), with approximate numbers used for both. For example, the approximate dimensions of a CR2032 are 20 mm in diameter and 3.2 mm in thickness.