Research on the Performance of Wide Temperature Range Fast Charging and Long Life Lithium-Ion Batteries

To address the challenges found in the use of lithium-ion batteries at both high and low temperatures, and in response to the demand for wide-temperature range lithium-ion batteries in certain applications, a ternary lithium-ion battery was developed. The research was carried out through the modification of graphite anodes and electrolytes to break through the performance barriers of lithium-ion batteries under wide temperature range conditions. In this study, using 200 Wh kg −1 ternary lithium-ion cells and 3S6P modules as prototypes, we modified graphite anodes and electrolytes to enhance performance. Innovations include graphite anode coating and high-conductivity electrolytes. Rate, cycle, vibration, and thermal shock tests were conducted. Results show that at 25 °C and 20 C, the single cell retains 95.24% of its discharge capacity. The module exhibits strong wide-temperature-range performance: at −5 °C and 0.2 C, discharge capacity retention is 84.8%, and at 55 °C and 1 C, it reaches 99.4%. These batteries have been verified in high/low-temperature and vibration environments, achieving leading performance.