The meaning of internal resistance of lithium battery:
1. The internal resistance consists of the electrode material, electrolyte, diaphragm resistance and contact resistance of each part. Polarization resistance refers to the resistance caused by polarization in electrochemical reactions, including resistance. caused by electrochemical polarity;
2. The actual internal resistance of the lithium-ion battery refers to the current flowing through the internal resistance of the battery when the battery is in operation. during normal battery use), the generation of a large amount of Joule heat (according to the formula: E-I2rt) causes the battery temperature to increase, resulting in a decrease in operating voltage discharge of the battery and a shortening of the discharge time, which has a serious impact on the performance and life of the battery.battery;
3. Accurately calculating battery resistance is complicated and will change over the life of the battery. According to experience, the larger the lithium-ion battery, the smaller the internal resistance. resistance, and vice versa.
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