How to improve the low temperature performance of lithium iron phosphate battery packs?

How to improve the low temperature performance of the lithium iron phosphate battery pack when it is cold? How to move the low temperature function of the lithium iron phosphate battery pack when it is cold? A test of the low-temperature performance of lithium iron phosphate battery packs. As we all know, the high temperature function of the lithium battery pack is very prominent, its peak heat can reach 350~500, and high temperature (60) can still release 100% of the capacity. But the low temperature is worse than other battery systems, so how to move its low temperature function? Lithium iron phosphate battery: Lithium iron phosphate battery refers to a lithium battery with lithium iron phosphate as the positive electrode. The important data of lithium battery positive electrode includes lithium cobalt acid, lithium manganese acid, lithium nickel acid, ternary data, lithium iron phosphate and so on. At present, most lithium batteries used positive data during the lithium iron phosphate period. The explosive rise in demand for lithium phosphate battery packs is the key to the low-temperature function of travel lithium. What are the factors that affect the low-temperature performance of lithium iron phosphate battery packs? Regarding lithium iron phosphate battery packs, the energy storage electric professional has conducted a more specific discussion on the factors affecting its low-temperature characteristics. The reasons are as follows: 1. Processing environment: iron phosphate As a high-tech product with many chemical raw materials and complex processes, lithium battery packs have high requirements for temperature, humidity, and dust in the processing environment. If the battery quality is not well controlled, the battery quality will be unstable. 2. Poor conductivity and slow diffusion of lithium ions. When the charge-discharge rate is high, the actual specific capacity is low, which is a problem that restricts the development of the lithium iron phosphate industry. The reason why lithium iron phosphate has not been used on a large scale is a major problem. 3. The influence of the data: the lithium iron phosphate cathode has poor conductivity, and the other electrode is simply polarized, reducing the capacity. The negative electrode is important to charge at low temperature, because it will affect the safety problem; in this part of the electrolyte, the viscosity will increase at low temperature, and the migration resistance of lithium ions will increase; the fourth is the binder, which is now a low-temperature battery bigger. How to travel the low temperature function of the lithium iron phosphate battery pack? We travel the low temperature function of the lithium iron phosphate battery pack from the positive electrode, the negative electrode, the electro-hydraulic, and the binder. As for the positive electrodes, they are all nanometers now. Its particle size, resistance and the growth of AB face axis will affect the low temperature characteristics of the entire battery. Different processes have different effects on the positive electrode. The low-temperature discharge performance of lithium iron phosphate batteries with a particle size of 100~200nm is better, and can release 94% at -20°C. This is also the reason why the nano-sized battery shortens the removal path and promotes the low-temperature discharge function, because the discharge of lithium iron phosphate is importantly related to the positive electrode. Taking into account the charging characteristics of the negative electrode, the low-temperature charging of the lithium battery is mainly affected by the negative electrode, including the particle size and distance of the negative electrode. Using three different artificial graphites as negative electrodes, the effects of different layer spacing and particle size on their low-temperature characteristics were studied. In terms of impedance, with regard to granular graphite with a large interlayer distance, the bulk impedance and ion removal impedance are relatively small. When charging, the lithium battery pack has no problem with power outage at low temperatures in winter, and it is important to charge at low temperatures. Because in terms of cross-flow rate, the ratio of cross-flow 10.5c or c is very important, and the constant pressure needs a long time. Through the comparison of three different improved graphites, it is found that there is a greater increase in the constant current ratio of -20 degrees. From 40% to more than 70%, the layer distance increases, and the particle size decreases. 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: How do you think about the safety performance of lithium battery packs?