2025年04月21日Do you know what is inside the 18650 battery?

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    Firstly, when disassembling the battery cell, remember to discharge the light. Here, discharge the 18650 battery cell until it reaches an effective voltage. Then, use sharp nose pliers to forcefully tear open the cover of the battery cell, separating the positive and negative steel shells to expose the positive and negative information of the safety valve and the coil pack.

    The safety valve is a standard configuration for every 18650 battery cell and also an important explosion-proof barrier. The working principle of the safety valve: When the temperature inside the battery is abnormal and the air pressure rises to 1.0-1.2Mpa, the safety valve opens to eliminate the internal gas and avoid excessive pressure. When the internal air pressure of Prismatic square soft pack packaged cells increases, it is common to see; Pregnant; The bulging scene.

    Here is a popular science about the positive inside of battery cells. The commonly used 2000-3000mAh capacity battery cells on the market have been upgraded from LiCoO2 lithium cobalt oxide to ternary materials and renamed as LiNi-Co-MnO2 nickel cobalt manganese. The direct benefits brought are longer lifespan, greater insurance, and better functionality. Speaking of which, the Prismatic square soft pack packaged mobile phone tablet battery cells also use LiNi-Co-MnO2 nickel cobalt manganese material, just different from the 18650 Cylinder packaging method. Take a close-up look at the internal information of the battery cell. The copper foil in the picture is used to coat LiNi-Co-MnO2 nickel cobalt manganese positive material, while the aluminum foil is used to coat graphene. The capacity of the battery cell is obtained based on the blending ratio of these formulas.

    Imitation is dangerous, disassembly should be done with caution. By violently disassembling 18650 battery cells, it was discovered that there is no liquid flowing out from the inside of the battery, so it does not exist; Liquid lithium ions; Easy statement. In fact, in abnormal situations, only by using it correctly, but charging and not touching its environment, 18650 battery cells will not cause any safety hazards.

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