What are the principles of using high-temperature batteries?

　　What are the principles of using high-temperature batteries? From the foreign samples we have encountered, most batteries belong to the 150 ℃ level. High temperature batteries can generally be divided into five levels for use in environments of 100 ℃, 125 ℃, 150 ℃, 175 ℃, and 200 ℃ or above. The key to using batteries underground in petroleum is how to meet the requirements of high-temperature environments underground and ensure their safe and reliable operation. In order to meet the requirements of high temperature, the following factors should be considered:

　　(1) Thermodynamic characteristics of battery contents;

　　⑵ Mechanical properties of the battery shell;

　　⑶ Safety design suitable for high-temperature environments (anti short circuit, anti reverse polarity, anti charging, anti impact, anti vibration, etc.);

　　(4) Electrical performance design suitable for high temperature environments (ratio of positive and negative active substances, selection of electrode thickness, selection of additives, etc.).

　　Based on the above four considerations, a mathematical model has been established. The design problem of high-temperature batteries has been theoretically solved. Given the technical requirements, the primary design parameters can be quickly given using mathematical calculation methods. Through primary and secondary battery effectiveness experiments, the design parameters of the batteries can be determined. After batch experiments and small modifications, the requirements for production finalization can be achieved.

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