18650 battery flat top

　　Talking about the basic principle of charging and discharging of 18650 lithium battery:

　　The working principle of lithium battery refers to its basic principle of charging and discharging. When charging the battery, lithium iron phosphate will be formed in the positive stage of the rechargeable battery, and the formed lithium iron phosphate will enter the negative stage through the lithium battery electrolyte. Carbon as the negative level has a lamellar structure and has many microporous plates. Lithium iron phosphate that has reached the negative level is placed in the carbon microporous plate. The more lithium iron phosphate is placed, the greater the battery’s charging capacity. big.

　　Similarly, when the battery is charged and discharged (that is, the whole process of using the battery), the lithium iron phosphate placed in the carbon layer of the negative stage is adsorbed by the resin, and moves back to the positive stage again. The larger the total flow rate of lithium iron phosphate, the larger the charge and discharge capacity; the volume of a rechargeable battery generally refers to the charge and discharge capacity.

　　When charging and discharging a lithium battery, lithium iron phosphate moves from positive → negative → positive; if we compare the brand image of a lithium battery to a rocking chair, the two sides of the rocking chair are the two sides of the battery, and the lithium battery is like an exercise Or, running back and forth on both sides of the rocking chair. Therefore, experts have given lithium battery a lovely name - rocking chair battery.

　　18650 lithium battery charging and discharging process:

　　The charging operation of lithium batteries is divided into two stages. The first stage is charging with constant current power supply. When the battery voltage drops, the charging head uses DC circuit to charge the battery; the second is the constant voltage charging link. When the battery voltage reaches a certain value , due to the characteristics of lithium batteries, if the working voltage is higher, it will be destroyed, the charging head will fix the working voltage, and the current will gradually decrease. When the current drops to a certain value (usually 1/10 of the set current ), disconnect the battery charging power supply circuit, and the battery charging indicator light is on, indicating that the battery is fully charged.