Battery structure design Battery structure design I. Classification of rechargeable batteries 1. According to the matching position of the mobile phone: built-in battery and external battery 2. According to the packaging structure: ultrasonic battery, snap-on battery, PVC heat shrink film battery, paper packaging battery 3. According to the power output form: plug connection battery, PCB board output battery, hardware battery (hardware bracket battery and hardware beer plastic battery) II. Structural development design details and technical specifications of rechargeable batteries (1) Built-in battery structure design 1) In order to increase the battery capacity, the built-in battery can usually be made into a through frame or square frame, and then fixed with a trademark. 2) The minimum material thickness can be 0.5mm, and the local thickness can be 0.4mm. 3) The bottom shell can be made of aluminum or steel sheet (0.2mm), embedded injection molding. 4) Heat shrinkage is flat, no grading or blistering. The battery cell and PCB cannot be exposed. 5) The label is flat, and the battery cell and PCB cannot be exposed. 6) External wire plug, the wire must be welded firmly. (2) External battery structure design 1. Material requirements for structural design 1) Rechargeable battery plastic shell materials usually include ABS, ABS+PC, PC, fireproof ABS, and fireproof PC 2) ABS material has low cost, medium fluidity, and a shrinkage rate of 0.5%. It has excellent ultrasonic performance and is suitable for batteries with thicker plastic parts and built-in batteries. 3) PC material has poor fluidity, fast cooling speed, and small shrinkage rate, which can usually be 0.4%. The mold must be made of wear-resistant steel and quenched. The plastic wall thickness should be uniform, the material cost is high, and ultrasonic testing is relatively difficult. 4) Fireproof ABS and fireproof PC are suitable for batteries with special requirements for fire protection. 2. Structural design requirements for appearance 1) The minimum thickness of the surface shell material is usually 0.6mm. The minimum thickness of the bottom shell can be 0.5mm, and 0.4mm can be taken locally. 2) The position of the ultrasonic line is not limited, it can be placed on the surface shell, the bottom shell, or the surface and bottom shells. The ultrasonic line structure is triangular, the bottom can be 0.3mm, and the height can be 0.35mm. If the ultrasound position is wide, the ultrasound line can be designed as an isosceles triangle \"△\", otherwise, it can be designed as a right angle...
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