배터리의 팽창과 변형을 개선하려면 어떻게 해야 하나요? Posted by batterymanufactory.com
Battery expansion and deformation (commonly known as "bulging") is a common problem for users of mobile phones, laptops, and electric vehicles. It not only affects the appearance of the equipment, but also hides the risk of short circuit and combustion. Starting from the principle, this article reveals the cause of bulging and provides user-level prevention tips and industry-level technical solutions. I. Why do batteries bulge? 1. Chemical gas production: Overcharging or high temperature causes the electrolyte to decompose, producing gases such as CO and CH₄; Lithium (Li metal) is deposited at the negative electrode and reacts with the electrolyte to produce H₂. 2. Material expansion: The volume change of silicon-based negative electrodes during charging and discharging is as high as 300% (traditional graphite is only 10%); After long-term cycling, the electrode becomes powdered, and the loose structure "enlarges" the battery cell . 3. Physical damag...