The operating temperature of ordinary batteries ranges from -20°C to +50°C. Those working below -20°C belong to a low temperature environment, and those working above 60°C belong to a high temperature environment. 

Except for industrial application scenarios such as high-temperature boilers and high-speed motors, drilling High-speed rotation of exploration equipment in the underground will also produce a high temperature environment, the highest temperature may reach 200 ℃, the instrument used for monitoring and collecting data also needs to withstand high temperature batteries as a power source, and equipment exposed to the hot summer sun will also work at high temperatures Condition. 

At present, the advanced high-temperature lithium thionyl chloride battery technology is still in the United States GE, APS, Tadiran, German Sunshine and other companies. Chinese companies can currently achieve lithium thionyl chloride batteries with a maximum temperature of 165°C, 125°C and 150°C. It is also achievable, no matter how high the temperature environment is, it has not been successful, so high-temperature lithium batteries for MWD, LWD, PWD, RSM and other equipment below 165°C will appear as Chinese products. 

For high-temperature lithium-ion rechargeable batteries, it is known from the US Energy Technology Laboratory that the United States completed the research and development of rechargeable batteries for MWD projects in 2010, and China’s high-temperature lithium-ion rechargeable batteries are currently only below +80°C.