The effect of temperature on polymer batteries

The adaptability of polymer batteries to battery temperature The safe use of polymer batteries under different environmental conditions is very important. Among all environmental factors. Temperature has the greatest impact on the charge and discharge performance of polymer batteries. The electrochemical reaction at the electrode/electrolyte interface is related to the ambient temperature. The electrode/electrolyte interface is regarded as the core of the polymer battery. If the temperature drops, the reaction rate of the electrode also drops: assuming that the voltage of the polymer battery remains constant, the discharge current decreases. The output power of the polymer battery is also reduced. Suppose the temperature rises in turn. The output power of polymer batteries has been added. Temperature will also affect the speed of electrolyte transfer. Increase the temperature and decrease the temperature: the charge and discharge performance of polymer batteries will also be affected. But the temperature is too high. It destroys the chemical balance of polymer batteries. After the polymer battery product picture is assembled and injected, the battery will be activated by a single charge, which is called conversion. The specified conversion temperature is 45±5°C. After the conversion, let it rest for a period of time, and then perform a capacity test, that is, charge the battery. The prescribed temperature for the volume test is 35±5°C. The room temperature storage temperature of the battery is generally 25±5°C, which will affect the activity of lithium ions. The higher the temperature, the higher the activity. However, if the temperature exceeds 60°C, it may cause irreversible damage to the separator inside the polymer battery, resulting in the battery being scrapped. If the temperature is too low, the activity of lithium ions will be too low, resulting in battery capacity cannot be released, that is, battery death. In the winter in the north, indoor mobile phones are fully charged, but outdoor mobile phones cannot go out for this reason. But once it returns to the normal temperature, it will recover and it will not have much impact on the battery. When the battery is used at 35°C, the capacity is relatively high. If the temperature rises again, the impact on the capacity is relatively small. However, if the temperature exceeds 60°C, the battery may be damaged, thereby affecting battery life. If the temperature is too low, the capacity will be low, that is, some electricity will not be released. Generally speaking, the capacity difference of the battery during normal use is not too great. For example, the capacity of a lithium iron phosphate battery at 20°C is only about 0.95% lower than that at 45°C, which is less than 1%. In summary, the temperature impact on polymer batteries is minimal and safe. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Introduction to common terms of drones and batteries