What is the difference between low-temperature lithium batteries and ordinary lithium batteries?

The main difference between low-temperature lithium batteries and ordinary lithium batteries is their performance in low-temperature environments. Low-temperature lithium batteries are specially designed to provide better performance at lower temperatures, while ordinary lithium batteries will face certain performance degradation under low-temperature conditions.

Here are the main differences between the two:
1. Operating temperature range
Low temperature lithium batteries: Low temperature lithium batteries are specially designed to operate in low temperature environments and can usually operate normally at temperatures of -20°C to -30°C or even lower. In contrast, the operating temperature of ordinary lithium batteries is generally between 0°C and 40°C, and their performance will be greatly affected at low temperatures.

Ordinary lithium batteries: In an environment below 0°C, the performance of ordinary lithium batteries will drop significantly, especially below -20°C, the battery's discharge capacity will be weakened, and it may even be unable to discharge normally.

2. Battery performance
Low-temperature lithium batteries: The electrolyte, materials, and internal structure of low-temperature lithium batteries are optimized to reduce the negative impact of low temperature on the battery's electrochemical reaction, thereby ensuring that high capacity and discharge efficiency can still be maintained at low temperatures. The internal electrochemical reaction rate of low-temperature lithium batteries is slow, but its reaction efficiency is still higher than that of ordinary lithium batteries.

Ordinary lithium batteries: At low temperatures, the viscosity of the electrolyte of ordinary lithium batteries increases, and the migration speed of lithium ions inside the battery slows down, resulting in a decrease in battery capacity, and even the problem of being unable to charge or discharge.

3. Charging capacity
Low-temperature lithium batteries: Low-temperature lithium batteries can still be charged effectively at low temperatures. Although the charging efficiency may be reduced, charging will not be completely stopped. Some low-temperature lithium batteries also have a self-heating function, which can improve the charging efficiency under extremely low-temperature conditions.

Ordinary lithium batteries: In low-temperature environments, the charging capacity of ordinary lithium batteries is greatly reduced, especially below -10°C. The electrochemical reaction of battery charging becomes extremely slow, the charging efficiency is significantly reduced, and it may even cause the lithium battery to be overcharged and damage the internal structure of the battery.

4. Materials and design
Low-temperature lithium batteries: Low-temperature lithium batteries usually use improved electrolytes and add anti-low-temperature solidification components to maintain good conductivity in low-temperature environments. In addition, the positive and negative electrode materials, diaphragm materials, etc. of the battery have also been specially treated to adapt to low-temperature environments.

Ordinary lithium batteries: Ordinary lithium batteries perform well at room temperature, but at low temperatures, the battery performance may be significantly reduced due to problems such as freezing of the electrolyte and reduced conductivity.

5. Application Scenarios
Low-temperature lithium batteries: Suitable for equipment used in low-temperature environments, such as drones in the Arctic, mountainous areas, and cold areas, ice and snow sports equipment, electric vehicles (in cold areas), military equipment, etc.

Ordinary lithium batteries: Widely used in electronic equipment, power tools, electric vehicles, etc. under daily temperature conditions.

6. Safety
Low-temperature lithium batteries: The safety of low-temperature lithium batteries is usually optimized to remain stable at low temperatures and reduce the risk of thermal runaway. However, the low-temperature operating range still needs to be strictly controlled to prevent damage to the battery.

Ordinary lithium batteries: Ordinary lithium batteries are at risk of overcharging and over-discharging at low temperatures because the chemical reaction inside the battery slows down, which may affect the voltage stability of the battery and cause thermal runaway or other safety issues.

Summary: The difference between low-temperature lithium batteries and ordinary lithium batteries lies in their adaptability to low-temperature environments. Low-temperature lithium batteries are specially designed and optimized to maintain good performance at lower temperatures, while ordinary lithium batteries are susceptible to performance degradation at low temperatures. Low-temperature lithium batteries have a wider range of applications, especially in extremely cold environments.