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18650 rechargeable battery lithium 3.7v 3500mah
18650 rechargeable battery lithium 3.7v 3500mah

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502030 battery

release time:2024-05-10 Hits:     Popular:AG11 battery

  What are the main functions of the 502030 battery thermal management system?

  What are the main functions of the 502030 battery thermal management system? Because too high or too low temperature will directly affect the service life and performance of the 502030 battery, and may lead to safety problems of the battery system, and long-term uneven temperature field in the battery box. Distribution will cause imbalance in performance among battery modules and cells. Therefore, a battery thermal management system is necessary for electric vehicle 502030 battery systems. Reliable and efficient thermal management systems are of great significance to the reliable and safe application of electric vehicles.

  1. Functions of 502030 battery thermal management system

  Because temperatures that are too high or too low will directly affect the service life and performance of the 502030 battery, and may lead to safety issues in the battery system, and the long-term uneven distribution of the temperature field in the battery box will cause problems between battery modules and cells. Uneven performance, therefore, a battery thermal management system is necessary for electric vehicle 502030 battery systems. Reliable and efficient thermal management systems are of great significance to the reliable and safe application of electric vehicles.

  The battery pack thermal management system has the following five main functions:

  ①Accurate measurement and monitoring of battery temperature.

  ② Effective heat dissipation and ventilation when the battery pack temperature is too high.

  ③Rapid heating under low temperature conditions.

  ④ Effective ventilation when harmful gases are generated.

  ⑤ Ensure the uniform distribution of the temperature field of the battery pack.

  2. Basic methods of heat transfer within the battery

  There are three main ways of heat transfer in the battery: heat conduction, convection heat transfer and radiation heat transfer.

  The heat exchanged between the battery and the environment is also carried out through three methods: radiation, conduction and convection. Thermal radiation mainly occurs on the battery surface and is related to the properties of the battery surface material.

  Thermal conduction refers to the heat transfer caused by direct contact between a substance and an object. The electrodes, electrolytes, current collectors, etc. inside the battery are all heat conduction media. Taking the battery as a whole, the temperature of the interface layer between the battery and the environment and the environmental heat conduction properties determine the heat conduction in the environment.

  Thermal convection refers to the exchange of heat on the battery surface through the flow of environmental media (generally fluid), which is also proportional to the temperature difference.

  For the interior of a single cell, thermal radiation and thermal convection have little impact, and heat transfer is mainly determined by thermal conduction. The amount of heat absorbed by the battery itself is related to the specific heat capacity of its material. The greater the specific heat capacity, the more heat dissipation, and the smaller the temperature rise of the battery. If the heat dissipated is greater than or equal to the heat generated, the battery temperature will not rise. If the heat dissipated is less than the heat generated, the heat will accumulate in the battery body and the battery temperature will rise.

  3. Battery pack thermal management system

  Design and implementation According to the heat transfer medium, the battery pack thermal management system can be divided into three types: air cooling, liquid cooling and phase change material cooling. Considering issues such as material development and manufacturing costs, the most effective and commonly used heat dissipation system currently uses air as the heat dissipation medium. According to the structure of the cooling air duct, the air cooling system can be divided into two types: serial ventilation and parallel ventilation, as shown in Figure 4-16 and Figure 4-17.


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