Thermal shock limit test where the battery is baked at a high temperature of 150 degrees for 10 to 30 minutes.
For lithium batteries commonly used in mobile phones, in accordance with international CE and UL standards, in accordance with the supply specifications of international professional battery manufacturers, and in accordance with the requirements of the world's largest operators. for purchasing cell phones, such extreme testing The temperature is 130 degrees, not 150 degrees, because no battery manufacturer, including Sony and Panasonic, offers commercial battery products that can withstand shock thermal of 150 degrees.
Lithium Battery Operating Temperature
The Pacific Automotive Network lithium iron phosphate battery is greatly affected by temperature, and thermal management of the battery is necessary to improve its effectiveness. To onetemperature of 0 ~ -20°C, the discharge capacity of lithium iron phosphate battery is equivalent to 88.05%, 65.52% and 38.88% of the discharge capacity at 25°C respectively, the voltage average discharge is 3.134, 2.963 V and; 2.788 V, respectively. The average discharge voltage at 20°C is 0.431 V lower than that at 25°C.
The minimum charging temperature of the lithium iron phosphate battery is -20°C. The battery will not exceed 20°C. If it is less than this value, it means it should be loaded. is greater than this voltage, it is basically almost full. Continuing to charge will cause the voltage to rise rapidly, the maximum voltage when full is 3.9V.
During discharging, the voltage drops quickly from 3.9V to 3.2 V and remains stable until the end of the discharge. At the end, the voltage drops quickly by 3.2 V. At this point, the energy can be considered exhausted.
FromGenerally speaking, discarded lithium iron phosphate batteries for electric vehicles still have nearly 80% of their capacity, and they still have 20% of their capacity remaining before the lower limit of 60% of complete disposal. be used for applications with lower electrical power requirements than cars, such as low-speed electric vehicles, communication base stations, etc., realize the step-by-step utilization of waste batteries. Lithium iron phosphate batteries removed from cars still have high usage value.
The process of phased use of power batteries is as follows: companies recycle out-of-use batteries - disassembly - testing and classification - classification by capacity - reorganization of battery modules. At the battery preparation level, the residual energy density of lithium iron phosphate batteries usAged can reach 60 ~ 90 Wh/kg, and the recycling life can reach 400 ~ 1000 times. As the battery preparation level increases, the recycling life can be further improved; and energy Compared with lead-acid batteries with a service life of 45 Wh/kg and a service life of about 500 times, used lithium iron phosphate batteries still have performance advantages. In addition, the cost of used lithium iron phosphate batteries is relatively low, only 4,000-10,000 yuan/t, which is very economical.
(Images/Text/Photos: Pacific Automotive Network Q&A)
First, the optimal operating temperature of lithium batteries is between 20℃ and 25℃. ℃ between ℃. In this temperature range, lithium batteries perform best, and battery capacity and life can be maximized. When the temperature exceedsAt 25°C, the battery capacity decreases and the chemical reaction inside the battery accelerates, reducing its lifespan. When the temperature is lower than 20℃, the battery's output power will decrease, and the diffusion rate of the battery's active materials will also slow down, affecting the battery's performance.
In addition, I would also like to remind you that under extreme temperature conditions, such as high temperature (over 60°C) or low temperature (less than -20°C), the Performance and safety of lithium batteries will be seriously affected. In a high temperature environment, the electrolyte will become unstable, which may cause dangerous situations such as overheating and battery explosion; in a low temperature environment, the reaction speed of the battery will be significantly reduced, which may lead to a sharp decrease in the capacity of the batlaugh. Therefore, try to avoid using lithium batteries in extreme temperatures to avoid safety risks.
I hope the information above is helpful to you! If you have any further questions, please continue to ask.