The suitable operating temperature of lithium polymer batteries is normal temperature (25 degrees Celsius ± 5), and the theoretical operating temperature is -40 to 70 degrees Celsius. The storage temperature complies with the theoretical use temperature (-40 to 70 degrees Celsius).
Lithium polymer batteries use file alloy as the positive electrode of the battery, polymer conductive materials, polyacetylene, polyaniline or polyparaphenol as the negative electrode of the battery, and the electrolyte uses organic solvents. The temperature limit of lithium polymer batteries is that because the electrolyte is made of colloidal material, no gas will be generated from inside the battery under high temperature conditions, thereby improving the safety of the battery .
Detailed informationLithium polymer batteries have the characteristics and advantagesfollowing:
1. Lithium polymer batteries have extremely high plasticity and can be made into thin batteries (the minimum thickness can be as thin as possible). such as 0.5mm), can also be made into batteries of different shapes, greatly improving user portability.
2. The storage capacity of lithium polymer batteries has been significantly improved compared to previous lithium batteries. Theoretical data obtained from the production process shows that the storage capacity of lithium polymer batteries is 10% higher than that of lithium polymer batteries. ordinary lithium-ion batteries.
Baidu Encyclopedia - Lithium Polymer Batteries
At what subzero temperature can ternary lithium batteries be used?
< p>First of all, the minimum temperature of lithium batteries. The best temperatureOperating temperature is between 20℃ and 25℃. In this temperature range, lithium batteries perform best, and battery capacity and life can be maximized. When the temperature exceeds 25°C, the battery capacity decreases and the chemical reaction inside the battery accelerates, reducing its lifespan. When the temperature is lower than 20°C, the battery output power will decrease, and the diffusion rate of battery active materials will also slow down, affecting the battery 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 telles that 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 battery capacity. 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.
What is the optimal operating temperature of lithium batteries in degrees Celsius?
Pacific Automotive Network's ternary lithium battery cannot be used at minus 10 degrees Celsius, and lithium-ion batteries cannot be exposed to too low a temperature. At too low temperatures, lithium is deposited in the battery, causing an internal short circuit. Simply put, in a low t environmenttemperature, it is not that the lithium battery is really discharged, but that it is powered but cannot be released normally. The capacity of ordinary lithium batteries will be reduced by 20% at zero degrees Celsius, and when it reaches minus 10 degrees Celsius, the capacity may only be about half.
Why can't lithium ions be administered in low temperature environments?Charging batteries? Lithium-ion batteries cannot be exposed to extremely low temperatures. At too low temperatures, lithium is deposited in the battery, causing an internal short circuit. Simply put, in a low temperature environment, it is not that the lithium battery is really discharged, but that it is powered but cannot be released normally. The capacity of ordinary lithium batteries will be reduced by 20% at zero degrees Celsius, and when it reaches minus 10 ddegrees Celsius, the capacity might only be about half.
Ternary low temperature rechargeable battery, the lithium iron phosphate system is charged at -20°C to 0.5°C, and the charge and discharge cycle is more than 300 cycles, it is charged at -40°C to 0.5°C; 0.2C, and the charge and discharge cycle is more than 300 cycles.
Ternary low temperature discharge battery, lithium iron phosphate system -40°C high rate continuous discharge 5C, capacity retention rate above 80°C; .
Why can't lithium-ion batteries be charged in low temperature environments?
Most materials in lithium-ion batteries, such as separators and electrolytes, are organic materials with low melting and boiling points. If the temperature is too high, some negative chemical reactions will occur inside the battery, causing them to deteriorate.will seriously affect. battery life and even security performance.
Under low temperature conditions, the conductivity of key materials of lithium-ion batteries, such as positive electrode, negative electrode and electrolyte, decreases, leading to a decrease in conductive performance and seriously affecting the lifespan. of the lithium battery.
For lithium batteries, there is currently no clear theory in the industry to support the inevitable relationship between internal resistance, discharge platform, life, capacity, etc. under various temperature performance. Calculation formulas and relevant mathematical models. are still under study. Generally speaking, lithium batteries are not sensitive to temperatures between 0 and 40°C. However, once the temperature exceeds this range, the lifespan and capacity will be compromised.
We haves carried out many experiments and found that the low temperature performance of lithium batteries of different materials is also different. The most popular lithium iron phosphate now has the worst low temperature performance. Our products have the maximum. discharge capacity at -10°C. The 89% should be relatively high in the industry; the discharge capacity can reach 95% at 55°C, and the attenuation at relatively low temperatures is relatively small. This is still a product sent for inspection. As you know, the quality is much higher than normal products on the assembly line.
Low temperature protection means that when the temperature is too low, the lithium metal in the lithium-ion battery will settle and no longer react chemically with the substance, resulting in an internal short circuit in the battery. battery.
Given that the principle ofHow lithium-ion batteries work is that the internal electrolyte changes through chemical reactions, a potential difference occurs between the positive and negative electrodes, thereby generating current. In a low temperature environment, the electrolyte moves very slowly, which affects the transfer activity of lithium ions between the positive and negative electrodes, resulting in a decrease in the charging and discharging performance of the battery.
Some people report that lithium-ion batteries cannot be charged in winter. Some people have lithium battery management systems due to product protection, and others cannot be charged due to quality problems.
The duration of use of lithium batteries in winter is necessarily shorter than in summer. I would like to remind you that it is better not to charge lithium batteries in winter. Due to the basse temperature, the lithium ions nestled on the negative electrode produceThe ions crystallize and directly pierce the diaphragm. Generally, it will cause a micro short circuit, which will affect the service life and performance. In severe cases, it can explode!
The impact of lithium batteries in low temperature environments Low temperatures impact the positive and negative electrodes, electrolytes and adhesives of lithium iron phosphate batteries.
(Images/Text/Photos: Pacific Automotive Network Q&A)
Conventional lithium battery operating temperature:< /strong>< /p> -20℃~60℃, but generally when the temperature is below 0℃, the performance of the lithium battery decreases, and the discharge capacity decreases accordingly. Therefore, the operating temperature for the full performance of lithium. the battery ist generally 0-40℃. The temperatures of lithium batteries required by some special environments vary, and some can even operate normally in environments of hundreds of degrees Celsius. Things to note when using lithium batteries: The battery will enter a dormant state after being left for a period of time. At this point, capacity is lower than normal. The value and duration of use are also shortened. However, lithium batteries are easy to activate. After 3-5 normal charge and discharge cycles, the battery can be activated and restored to its normal capacity. The lifespan of lithium batteries is only two to three years, and lithium batteries can generally be charged and discharged 300 to 500 times. Lithium metal batteries generally use manganese dioxide as the positive electrode material, lithiumum metal or its metal alloy as the negative electrode material, and use a non-aqueous electrolyte solution. The above content refers to lithium battery from Baidu encyclopedia