Everyone knows that charging a lithium battery in a low temperature environment has certain risks. Because as the temperature decreases, the kinetic characteristics of the graphite negative electrode become worse. During the charging process, the electrochemical polarization of the negative electrode is obviously intensified, and the precipitated metal lithium is likely to form lithium dendrites, piercing the diaphragm and causing the short circuit of the positive and negative electrodes. .
Try to avoid charging lithium-ion batteries at low temperatures. When the battery must be charged at a low temperature, it is necessary to select a small current (ie slow charge) as much as possible to charge the lithium-ion battery, and fully store the lithium-ion battery after charging, so as to ensure that the metal lithium precipitated from the negative electrode can react with the graphite , Re-embedded inside the graphite anode.
The exploration and research on the low-temperature resistance of batteries by industry enterprises and scientific research institutions mostly focus on the process improvement of the existing positive and negative materials, and by increasing the local environmental temperature of the battery to create conditions for the battery to work at low temperatures. With the further development of the technology, lithium batteries will have further breakthroughs in low temperature environments.
