1. The materials of the positive electrode are different: the positive electrode of the lithium iron phosphate battery is made of iron phosphate, and the positive electrode of the ternary lithium battery is made of ternary material.
2. Different energy densities: The energy density of lithium iron phosphate battery cells is 110 Wh per kg, while the energy density of ternary lithium battery cells is generally 200 Wh per kg. By weight, the energy density of ternary lithium batteries is 1.7 times that of lithium iron phosphate batteries. Ternary lithium batteries can extend the battery life of new energy vehicles.
3. Different temperature difference efficiencies: Although lithium iron phosphate batteries are resistant to high temperatures, ternary lithium batteries have better low temperature resistance and are the mainipale technical route to manufacture lithium batteries at low temperatures. At 20 degrees Celsius, ternary lithium batteries Lithium batteries can release 70.14% of their capacity, while lithium iron phosphate batteries can only release 54.94% of their capacity.
4. Charging efficiency is different: ternary lithium battery is more efficient. Experimental data shows that there is not much difference between the two when charging below 10 degrees Celsius, but the distance will increase above 10 degrees Celsius. Charging at 20 degrees Celsius At this time, the constant current ratio of the ternary lithium battery is 52.75%, and the constant current ratio of the lithium iron phosphate battery is 10.08%.
5. Different lifespan: The lifespan of lithium iron phosphate battery is better than that of ternary lithium battery.
6. Iron phosphateLithium is a lithium-ion battery electrode material with the chemical formula LiFePO4 (LFP for short). It is mainly used in various lithium-ion batteries.
Which is gel-resistant lead-acid battery or lithium battery?
The use of lithium batteries for solar street lights at low temperatures will be affected to a certain extent. Lithium batteries are currently the most common type of battery used in solar street lights. They have the advantages of high energy density, long life and portability. However, in low temperature environments, the performance of lithium batteries is subject to certain limitations.
First of all, low temperatures will reduce the charge transfer speed of lithium batteries. The charge transfer of lithium batteries takes place via the ions present in the electrolyte, and a low temperatureature will cause the ionic activity of the electrolyte to decrease, thereby slowing the rate of charge transfer. This will cause the charging and discharging speed of the lithium battery to slow down, affecting the normal use of solar street lights.
Second, low temperatures will also reduce the capacity of lithium batteries. The capacity of a lithium battery refers to the amount of charge the battery can store, and low temperatures will slow down the chemical reactions inside the battery, reducing the battery's capacity. This means that at low temperatures, the energy storage capacity of lithium batteries will be weakened and the brightness and use time of solar street lights may be affected.
In addition, low temperatures will also increase the internal resistance of lithium batteries. Internal resistance refers to the resistance au current flow inside the battery, and low temperature will cause the conductivity of the materials inside the battery to decrease, thereby increasing the internal resistance of the battery. This will cause the battery to discharge faster at low temperatures and the voltage to drop faster, thereby affecting the normal operation of the solar street light.
In order to solve the problem of using lithium batteries for low temperature solar street lights, the following measures can be taken:
1. Choose lithium batteries suitable for low temperature environments. . Some special devicesLow temperature lithium batteries are designed to operate normally at lower temperatures, and these batteries can be considered to improve the performance of solar street lights.
2. Use thermal insulation measures. Insulating materials can bee added to the battery box of solar street lights to reduce the impact of low temperatures on the battery and improve the operating efficiency of the battery.
3. Increase battery capacity. The battery capacity of solar street lights can be increased to compensate for the impact of reduced battery capacity at low temperatures and ensure the normal use time of solar street lights.
In summary, the use of lithium batteries for solar street lights at low temperatures will be subject to certain restrictions. However, by selecting batteries suitable for low temperature environments, taking insulation measures and increasing battery capacity, the impact. low temperature on solar energy can be reduced. The impact of street lamps to ensure their normal use.
Why don't lithium batteries last in winter?
The batteries lithium batteries are frost resistant.
In low temperature environments, lithium batteries are more resistant to cold than lead acid batteries.
Lithium batteries, especially lithium iron phosphate batteries and ternary lithium batteries, perform relatively well in low temperature environments. All types of batteries will be affected to some extent at low temperatures, but lithium batteries can still maintain high discharge efficiency in minus 20 degrees Celsius environment. For example, lithium iron phosphate batteries can achieve a discharge capacity of around 70%. Some optimized design ternary lithium batteries can achieve a discharge efficiency of around 80%.
The reasons why lithium batteries are not durable in winter are:
1. In thelow temperature environments, the viscosity of the electrolyte. increases and even partially solidifies, leading to a decrease in the conductivity of lithium-ion batteries.
2. The compatibility between the electrolyte, negative electrode and separator deteriorates in low temperature environments.
3. Lithium is seriously precipitated from the negative electrode of lithium-ion batteries in low temperature environments, and the precipitated lithium metal reacts with the electrolyte, and the deposition of the product causes the thickness of the lithium to increase. solid electrolyte interface (SEI).
4. In low temperature environments, the diffusion system within the active material of lithium-ion batteries decreases and the resistance to charge transfer (Rct) increases significantly.
Lithium battery usage instructions:
1. Keeping Lithium-Ion Batteries Properlycharged and discharged can extend battery life. Keeping the lithium-ion battery power between 10% and 90% is beneficial to protect the battery. This means that when charging batteries of digital products such as mobile phones and laptops, it is not necessary to reach the maximum value.
2. If digital products equipped with lithium-ion batteries are exposed to sunlight or stored in hot cars, it is better to turn off these products because if the operating temperature exceeds 60 degrees Celsius, the lithium-ion battery will accelerate aging .
3. If the cell phone battery needs to be charged every day, the reason may be that the battery is defective or that it needs to be "retired" for laptop owners, if it is plugged in for a long time . time, it is best to remove it. Remove the batterie (the high heat generated by the computer during use is harmful to the computer. Not good for laptop batteries).