18650 battery 3.7v 1800mah

　　Multi-parallel multi-string 18650 lithium-ion battery pack design process skills

　　1. Adopt the principle of giving priority to easy operation, that is, it is easy for employees to operate.

　　Low temperature high energy density 18650 3350mAh-40℃ 0.5C discharge capacity ≥60%

　　Charging temperature: 0~45℃ Discharging temperature: -40~+55℃ Specific energy: 240Wh/kg -40℃ discharge capacity retention rate: 0.5C discharge capacity≥60%

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　　2. Take the principle of prioritizing operation safety, that is, it is not easy for employees to short-circuit or have good preventive measures when operating.

　　3. Adopt the principle of equipment, that is, use auxiliary equipment to complete without manual labor as much as possible, at least semi-automatic.

　　4. The packaging design should be reasonable, easy to take and put away, and don’t want the product to be out of the customer’s place for a long time.

　　There are many reasons for the inconsistency of the 18650 lithium-ion battery before the pack. The materials that make up the battery itself are not completely consistent, and the process of manufacturing the battery cannot be controlled so that each battery is the same in any detail. This will lead to inconsistent capacity, inconsistent terminal voltage, inconsistent internal resistance, inconsistent life, etc. In addition to screening for electrical properties, the appearance of 18650 lithium-ion batteries is also inspected. For example, scratches, damage, stains, pits, bumps and other defects on the surface of the battery will affect the assembly of the battery module and the safety characteristics of the group.

　　Summary: 18650 lithium-ion batteries must be screened before PACK. Different customers have completely different requirements for the cells before 18650 lithium-ion batteries. Due to the high degree of automation and good stability in the production of 18650 lithium-ion power lithium batteries, High replaceability can effectively reduce production costs and save labor, making the 18650 battery have unparalleled unique advantages in the modularization and standardization of system development.