The requirements for the shell of a power bank mainly include material selection, fire resistance, appearance identification, and interface design.
Material selection
The main materials for the shell of a power bank are metal and plastic. The metal shell has high durability and electromagnetic shielding performance, suitable for maintaining stability under external forces such as falling and crushing, and has good flame retardancy. Plastic shells are relatively lightweight, easy to process and paint, but have poor flame retardancy.
Fire resistance performance
According to national industry standards, the fire rating of the shell of a power bank must comply with GB4943.1 certification requirements and meet V-1 requirements. This means that the shell material of the power bank must have a certain degree of fire resistance to ensure that it can provide a certain processing time in case of fire and avoid causing major safety accidents.
Appearance identification and interface design
The appearance of the power bank should comply with relevant specifications, the surface should be clean, without obvious deformation or mechanical damage, and the interface contacts should be free of rust. The mobile power bank body should be labeled with the name, model, manufacturer information, rated input and output voltage, current, capacity, and other markings. The interface design should be neat, free of damage and deformation, and have anti reverse connection design to ensure normal input and output after plugging in.
Security
Metal shells have natural advantages in flame retardancy, while the quality of plastic shells varies greatly. Plastic shells with good flame retardancy are also less likely to melt or burn at high temperatures. Therefore, in terms of safety, metal material power banks are more secure.
Comparison of advantages and disadvantages of different materials
Metal material: sturdy, flame retardant, good electromagnetic shielding effect, but heavy.
Plastic material: lightweight, low-cost, easy to process, but has poor flame retardancy.
When choosing a power bank, users can choose the appropriate material and brand according to their needs and preferences to ensure safety and portability.
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