Factors affecting high -power battery discharge performance.lifepo4 solar battery manufacturer

　　The effect of pole ear on the performance of high -magnification battery. Under the condition of high -mortivity discharge, the discharge voltage curve of the high -magnification battery will have a voltage peak, and the battery discharge capacity will also increase. Through the method of infrared thermal imaging method, a relatively detailed payment of thermal behavior under the condition of lithium -ion battery high -power discharge conditions shows that the electrode reactions in various regions in the process of potassium ion battery discharge are very unbalanced. Under the condition of high multiplied discharge, the resistance of the area near the ears near the battery at the beginning was small and the current density was large. Therefore, the heat generated by this part was relatively large, and the temperature increased rapidly. In the later period of the discharge process, the capacity near the polar ear area was exhausted. If the temperature rose slowly from the temperature rising, the discharge process would end, and the voltage increased phenomenon will occur. When designing large -current discharge lithium -ion batteries, a few buildings can be welded on the electrical tower pole plate. In this way, under the condition of high multiply discharge conditions, there will be multiple regional resistance inside the battery in the early stage of the battery. Large, the response speed is fast, so as to ease the severe response in the situation of monocular ear. In fact, when there are multiple pole ears on the electrode, it is equivalent to several small batteries in parallel to form a large battery. The battery voltage U does not change.

　　U = u = u = u '· ...

　　The large battery resistance R consists of several small battery resistors R1, R3, R ... and so on. It is similar to:

　　R = 1/(1/R,+1/R2+L/R · ...+L/R)

　　R must be less than R1, R2, R3, RN ...

　　R = r,+r+r+...+r.

　　As a result, the total internal resistance of the high -magnification battery after parallel is greatly reduced. In the case of large -current discharge, the temperature of the high -magnification battery rises quickly. Due to the low internal resistance, the battery of multiple pole ears welded is relieved, and the surface temperature of the battery is reduced.

　　When the high -power battery is discharged at 5C, the discharge capacity of the monocular ear battery reaches about 1060mAh, and the discharge capacity of the double -pole ear battery is about 1030mAh, which is slightly lower than the single ear battery. However, the initial discharge voltage of the double -pole ear battery is higher than that of a single ear battery, and the discharge platform is not as flat as a single -ear battery. With a certain model of soft packaging lithium ion battery as the research object, the number of polar ear on the polar film will inevitably increase the thickness of the battery (because the polar ear welded on the electrode tablet will occupy the thickness of the battery) Lithium ion batteries. The battery of this bipolar ear is relatively reduced. Therefore, the dual -ear battery is lower than the discharge capacity of the monocular ear battery. Fast decline in voltage platforms is not caused by poor electrochemical performance of bipolar ear battery, but because the polar ear of the battery is increased, the thickness of the battery will inevitably increase the length of the polar film, thereby reducing the active substance Caused by us.

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