Temperature resistance is a key indicator for the safe and stable operation of lithium-ion batteries, which directly affects the charge and discharge efficiency, capacity retention rate and service life of the battery, and is also a core factor determining its applicability in extreme environments. Different from conventional electrical scenarios, lithium-ion batteries are prone to performance degradation, safety hazards and other problems in high or low temperature environments. Therefore, in-depth understanding of their temperature resistance characteristics and comparing the temperature resistance performance of different types of batteries is of great significance for battery selection and safe operation and maintenance in various application scenarios.

　　The temperature resistance of lithium-ion batteries is mainly divided into two dimensions: high temperature resistance and low temperature resistance. In high-temperature environments, the electrolyte inside the battery is prone to decomposition, accelerating the aging of electrode materials, which not only leads to rapid capacity attenuation, but also may cause safety accidents such as bulging, leakage and even fire. The upper limit of the safe working temperature of conventional lithium-ion batteries is mostly 45-60℃, and a heat dissipation system is required for assistance beyond this range. Among them, lithium iron phosphate batteries have better high-temperature stability than ternary lithium batteries, can withstand short-term work at 60-80℃, and are more suitable for scenarios such as high-temperature energy storage and outdoor equipment.

　　Low-temperature environments also restrict the performance of lithium-ion batteries. Low temperature will reduce the conductivity of the electrolyte, hinder the migration of lithium ions, lead to decreased charge and discharge efficiency, shortened battery life, and even failure to start normally. The discharge capacity of conventional products will drop to less than 50% of the rated capacity below -10℃, while lithium-ion batteries modified for low temperature (such as adding special electrolytes and optimizing electrode structure) can maintain more than 70% of the discharge capacity in environments of -20℃ or even -40℃, adapting to equipment in polar and alpine regions. In addition, lithium titanate batteries have the widest temperature resistance range, which can work stably from -30℃ to 80℃, and are mostly used in special low-temperature or high-temperature equipment, fully demonstrating the temperature resistance differences and scenario adaptability of different types of lithium-ion batteries.