source:other news release time:2023-05-17 Hits: Popular:Lithium-ion battery wholesale
Under low temperature conditions, the low -temperature lithium battery reduces the activity of various active substances. The response rate of the battery electrode is low, the battery function is low, the actual charging volume is low, and the battery operates is short.
During the low temperature charging process, the lithium battery is likely to cause lithium ions to be separated in the negative electrode, resulting in lithium metal crystals, that is, the phenomenon of "lithium crystal branch". The formation of the "lithium crystal branch" will break the battery barrier, resulting in short circuit between the positive and negative electrodes inside the battery, causing safety problems. Lithium metal reacts with electrolytes, reduces battery activity, and extends battery life.
1. Customized low -temperature battery
Due to its wide application range, the demand for lithium batteries in many fields is not satisfactory, especially in the current electric vehicles. In northern China, the winter climate is relatively cold, and the outdoor temperature can reach -30 ° C. The existing technologies of low-temperature lithium battery custom manufacturers have exceeded this limit, which can generate high-performance discharge at low temperatures. Low-temperature heteroid batteries can discharge 0.2C at -40 ° C at -40 ° C, with an efficiency of more than 60 %. At -30 ° C can be discharged at 0.2C, with an efficiency of more than 80 %.
2. Heating lithium battery
The second is to heat the lithium battery when the lithium battery is charged in a low temperature environment, thereby preventing the occurrence of "lithium crystal branches". Although it is better than the application in the application, its structure is complicated and difficult to control. The high failure rate has always affected the application of low -temperature lithium batteries, especially in the field of electric vehicles.
3. Small current pulses make the battery fully charged
The third is to charge the battery completely after the small and small current pulses of the low temperature environment. Theoretically, the problems of low -temperature charging and non -spray have been improved, and the electronic movement speed in the low temperature state is greater than the electronic movement speed during the formation of the re -positioning speed of the lithium ion. However, the amount of positive and negative electrode matching is ignored under low temperature conditions. The security problem caused by imbalance is a "relative charging phenomenon".
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