As a new type of smoking cessation and control product, e-cigarette consists of three parts: cigarette rod, atomizer and cigarette bomb. The playability and cool of big smoke e-cigarettes make them have many fans. They require large batteries, large power supply current and large output. Therefore, batteries built into cigarette poles are the largest part of electronic incense. Most e-cigarettes use primary lithium ion batteries or secondary lithium-ion batteries. Batteries are the main energy supply body of e-cigarettes, The quality of the product directly determines the user's sense of experience.