二次电池和二次电池的使用方法
By adjusting the charge and discharge characteristics of the positive and negative electrodes in a lithium-ion secondary battery to ensure they meet a specific relationship in the early stages of use, the battery's lifespan is extended, the problem of inaccurate positive electrode potential evaluation is solved, and the battery's full capacity is effectively utilized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ENVISION AESC JAPAN LTD
- Filing Date
- 2018-01-25
- Publication Date
- 2026-07-17
AI Technical Summary
In existing lithium-ion secondary batteries, the potential relationship between the positive and negative electrodes changes with degradation during charging and discharging, making it impossible to accurately evaluate the positive electrode potential. This may result in the battery becoming unusable, and even if there is remaining capacity, it cannot be used as a battery.
By setting the charge and discharge characteristics of the positive and negative electrodes in the early stage of the use of the secondary battery, the rate of decrease in positive electrode potential before the end of full discharge is greater than the rate of increase in negative electrode potential, and the rate of increase in positive electrode potential before the end of full charge is greater than the rate of decrease in negative electrode potential. This process continues until the rate of decrease in positive electrode potential is less than the rate of increase in negative electrode potential. Specific materials and processing methods, such as chemical treatment, are used to adjust the irreversible capacity of the polar materials.
It extends the product life of secondary batteries, ensures that the battery can effectively utilize the full capacity of the positive and negative electrodes during use, suppresses capacity reduction, and improves battery life.
Smart Images
Figure CN115275324B_ABST