The battery shell is ABS high-strength and high-density plastic.
The outer battery shell of the battery is used to hold the electrolyte and the plate group. The outer battery shell should be acid-resistant, heat-resistant and shock-resistant.
Made of rubber. Now China has begun to produce polypropylene plastic battery shell. The battery shell is not only resistant to acid, heat and shock, but also has high strength. The battery shell wall is thin (usually 3.5mm, while the hard rubber battery shell wall thickness is 10mm), light weight, beautiful appearance, and transparency.
The battery shell is used to hold the electrolyte and the plate assembly and should be made of a material that is resistant to acids, heat, vibration, and insulation, and that has a mechanical strength. Most of the early-generation starter batteries were made of hard rubber housings.
The rapid development of plastics uses polypropylene plastic battery shells. Compared with hard rubber battery shell, it has better toughness, thin wall and light wall thickness of only 3.5mm, and plastic battery shell wall thickness of about l0mm), and the production process is simple, high production efficiency, easy to heat seal , will not bring in any harmful impurities, beautiful appearance, transparent, low-level advantages.
The hard rubber used in the earlier tanks, lids, and other components was vulcanized rubber (sulphur content was 25% or more), and different types of fillers and accelerators were added. Natural rubber was used at that time, and it was gradually replaced by synthetic rubber after the 1960s. At present, except for the large-capacity starter battery, the battery tanks in other categories are made of plastic material.