The influence factors of lithium battery internal resistance and composition

Source: 2020 - 03 - 28 but as hits: first lithium battery internal resistance of understand the working process of the lithium battery, repressors formed in the process of lithium battery internal resistance. The battery internal resistance by the ohmic resistance and the polarization resistance. Under the condition of temperature stability, ohmic resistance is stable, polarization resistance will change as the factors influencing the level of polarization. Ohmic resistance is mainly composed of data electrode, electrolyte, the gap resistance and contact resistance and so on various parts, such as collecting fluid connection with a ear. It is associated with battery specifications, structure and connection mode. Polarization resistance is loaded in the current moment, is to stop charged ions in the battery the sum total of all kinds of trends to the destination. Polarization resistance can be divided into the electrochemical polarization and concentration polarization. Electrochemical polarization is composed of the rate of electrolyte in the electrochemical reaction, electrochemical reaction speed cannot reach the speed of the electronic movement. Concentration polarization is made up of lithium ions into the positive and negative data, in the data at the speed of slow than lithium ion moved towards the electrode. 3. The influence factors of lithium battery internal resistance from the above process, we can infer that as the influence factors of battery internal resistance. 3. 1 additional element temperature and environmental temperature is one of the important factors affecting a variety of resistance. Specific to the lithium battery, due to the temperature influence the actiity of the electrochemical data, so choose directly electrochemical reaction speed and the speed of the ion movement. Current can be load demand, on the one hand, the size of the current is directly related to the polarization resistance. The general trend is the greater the current, the bigger the polarization resistance. On the other hand, the heating effect of the current influence the activity of electrochemical materials.