Generally speaking, the working temperature of rechargeable batteries is around 40℃, but in some practical application environments, the working temperature of rechargeable batteries is very hot, and the working temperature of rechargeable batteries can reach 75℃ or above. This basically requires high temperature resistance. Battery. At present, high temperature resistant batteries mainly include polymer ternary lithium batteries, polymer lithium batteries and lithium iron phosphate batteries. So which high temperature lithium battery is better? 1. High temperature resistant ternary lithium batteries Generally speaking, lithium batteries are The temperature in the 0-40℃ area is not sensitive. If the temperature exceeds this area, the life and capacity of the lithium battery will be reduced. Therefore, the operating temperature of lithium-ion batteries is generally 0-40°C. When the lithium-ion battery works at a temperature above 50°C and below 60°C, the attenuation coefficient of the rechargeable battery is reduced, and the service life reaches a certain attenuation coefficient. The temperature of lithium batteries required by some special environments is different, and some can even operate normally in an environment of hundreds of degrees Celsius. The ternary lithium battery adapts to a wide range of operating temperatures, and its electric heating peak can reach 350°C-500°C.

　　The organic chemical properties of metallic lithium materials are very obvious during the heating process, and the high temperature resistance of rechargeable batteries is about 200°C. When the temperature is higher, the organic chemistry of the ternary lithium material will be stronger, and the electrolysis of the lithium battery will quickly light up.

　　2. High temperature resistant polymer lithium battery Generally speaking, the working temperature of polymer lithium battery is between -20℃-70℃. High temperature and low temperature will affect the capacity of the battery. In addition, the chemical structure of the materials in rechargeable batteries will continue to be damaged and changed, which will seriously affect the service life of the battery. The high-temperature lithium battery can withstand up to 800 degrees of heat. Generally speaking, lithium is 200 degrees Celsius, 500 degrees Celsius and 800 degrees Celsius in high temperature measurement, but it is not easy to come into contact with this high temperature in normal daily life. However, we can sometimes see that the battery is damaged when charging or overusing electrical appliances. In particular, more and more smart products are equipped with battery bending. Only the testing service will have a 50-channel safety test process. In this process, the new high-temperature engineering will make the battery bend 50 degrees and have a service life. The life is unlikely to come into contact with the battery. High lithium ion batteries can generally be installed 300-500 times. It is better to partially discharge rather than fully charge the lithium-ion battery, and to minimize the amount of normal charge and discharge. Once the rechargeable battery leaves the production line, the clock starts to move. Regardless of whether you use it or not, lithium has only been used for two to three years. 3. High temperature resistant lithium iron phosphate battery The high temperature resistant lithium iron phosphate battery pack can be divided into five levels for use in natural environments at 100°C, 125°C, 150°C, 175°C and 200°C. Currently, many major high-temperature batteries are used for lithium/sulfonyl chloride and lithium/sulfonyl chloride in electro-photocatalytic management systems. This is because these two systems have the highest energy density, a wide temperature range, the longest storage time, and the highest operating frequency. The P-O bond in the LifePO3 crystal is solid and cannot be dissolved. Even under high temperature or high pressure, it will not collapse like the Li-Co structure, nor will it produce strong oxides, a good safety factor. The maximum calorific value of the rechargeable battery is 350,500 degrees Celsius, the operating temperature range is wide (-2075 degrees Celsius), and the volume is 100% at 60 degrees Celsius.