What is the cause of battery discharge fever

What is the cause of battery discharge fever

There is also the definition of this capacity. I checked Baidu and all thought to interrupt the discharge at 3.5V. However, it is obvious that the capacity is not good. Is the calculation of the capacity from full power to the cut-off power of 2.75V the nominal capacity, or always to the nominal capacity of the measured capacity of 0V?

If the cell is, you should have a problem with the combination, because the current of 5P is only 12a. Even down, the current suffered by each section is 2.4a, and the temperature rise cannot be so large.

There is a large charge and discharge current in the cell, which is far beyond the charge and discharge current of the lithium-ion battery of the mobile phone. Therefore, the battery maintenance board of the mobile phone is applied on the 18650 cell. If the charging current and discharge current are relatively small, such as within 1000mA, it is still possible, but if it is higher than this current, if it reaches 2A or higher, the local difference is appropriate, and the maintenance board is easy to be burned, Cause maintenance to take effect.

4.2V is the charge binding voltage of lithium-ion battery, and 3.7V is the discharge maintenance voltage. On the mobile phone, when the battery is discharged to 3.6-3.7V, the mobile phone will prompt that the battery is weak and needs to be charged and shut down. The discharge maintenance voltage of the battery maintenance board is 2.75-3.0v. The power consumption of household appliances in standby mode is very small, so the discharge current is also very small, and there will be no heating scene in some cases. However, when household appliances work, according to the principle of parallel current circuit, the equivalent load resistance of its battery is small, and it is discharged with high current. At present, the internal resistance of the battery increases when a part of the battery is discharged. However, the current required for the operation of household appliances cannot be reduced. Then, a considerable part of the energy is consumed on the internal resistance of the battery, resulting in the heating of the battery. At the same time, the discharge of individual batteries is accelerated, and the utilization time of the battery is quickly shortened. Editor 1 Moderate heating of the battery for a long time will lead to the temperature rise of the internal parts and affect the abnormal work of the parts.

The long-term heating of the battery will increase the heat of the battery itself. If it is sealed (Se and the like are not sealed, and the battery is directly loaded into the battery), the battery will make its internal air expand violently, resulting in the rise of the battery outside the image, which will make the battery; 3. Long term moderate heating of the battery will accelerate the aging process of the product and shorten its service life.