Special low-temperature lithium-ion batteries have specific temperature requirements, primarily for environments as low as -40°C. They must be able to retain over 80% of their rated capacity when discharged at 0.2C. Their main characteristic is sufficient capacity to operate normally at low temperatures.
Currently, the best-performing commercial and consumer-grade low-temperature lithium-ion batteries on the market are lithium cobalt oxide-based low-temperature polymer lithium-ion batteries. Many lithium-ion battery manufacturers have, after years of research and development, developed their own proprietary battery formulations, offering the following advantages in low-temperature lithium-ion battery performance:
(1) It has high low-temperature discharge performance, with an efficiency of over 60% at a discharge rate of 0.2C at a minimum of -50℃; and a discharge capacity of 80% at a discharge rate of 0.2C at an environment of -40℃.
(2) Low-temperature lithium-ion batteries have a wide operating temperature range, from -50°C to 50°C;
(3) Excellent low-temperature cycling performance; after 300 cycles of charging and discharging at 0.5C in an environment of -30℃, the capacity remains above 85%;
(4) High safety performance, certified by UL/CE/UN;
(5) Flexible dimensions; customizable in size and shape according to customer needs.
(6) Compared with traditional lithium polymer batteries, it breaks through the discharge temperature limit of -20℃ to 60℃.
(7) It has the capability for mass production, and the batteries exhibit good consistency;
(8) Low-temperature lithium-ion batteries can generate large current and maintain large capacity at -50℃;
(9) Low-temperature lithium-ion batteries can still maintain their excellent performance under operating conditions of -50℃;
(10) Low-temperature lithium-ion batteries can be widely used in cold climates and special equipment.
The demand for batteries is increasing, and the requirements are becoming more stringent. Batteries come in various types, which can be categorized into three types based on low-temperature performance: civilian low-temperature batteries, special low-temperature batteries, and batteries for extreme environments. Today, we'll focus on the characteristics of special low-temperature batteries.
Low-temperature lithium iron phosphate batteries belong to the category of special low-temperature batteries and are widely used in low-temperature fields such as equipment, aerospace industry, diving equipment, polar scientific research, power communication, public security, and medical electronics. They have the following characteristics:
It has low internal resistance and utilizes superposition technology for more efficient discharge.
At -40℃ and a discharge rate of 0.5C, the discharge capacity exceeds 60% of the initial capacity; at -35℃ and a discharge rate of 0.3C, the discharge capacity exceeds 70% of the initial capacity.
It has a wide operating temperature range, with a minimum temperature of 40℃ and a maximum temperature of 55℃;
It can be charged at -20℃;
Using lithium iron phosphate chemistry, it boasts high safety and long cycle life;
Certified by UL/CE/UN;
The size is flexible, and the size and shape of the battery can be designed according to customer needs.
