The accumulation of polarization phenomenon
Posted: Thu Feb 13, 2025 6:44 am
If there is a difference between the batteries, the battery life will be shortened. Under this influence, the 800V battery system increases the requirements for cell manufacturing technology and cell consistency. As the number of cell rows increases, the complexity of battery consistency management increases. Components and connectors such as the BMS (battery management system) main chip on the vehicle side, the sampling chip, and the high-voltage and low-voltage communication isolation chip need to be re-sampled. At the same time, due to the large amount of heat generated during fast charging, the risk of thermal rupture increases, so effective monitoring and warning is required.
In slow charging technology, since the current in the external circuit is small, the electron migration speed is correspondingly slower. At this point, the reaction of ions and electrons in the internal circuit costa rica number data adapts to the speed of electrons in the external circuit. In this environment, the potential of the two poles is almost the same as the equilibrium potential.
In fast charging applications, lithium ions are quickly disconnected from the positive electrode, which leads to an extremely high lithium ion concentration inside the battery. The sudden increase in lithium ion concentration causes a voltage mismatch between the active species inside the battery. When this happens and the stress reaches the threshold, it leads to the destruction of the active species and their damage, which not only shortens the life of the power battery, but also increases its internal resistance. Due to the increase in the internal resistance of the battery, the migration speed of ions and electrons in the internal circuit slows down.
In slow charging technology, since the current in the external circuit is small, the electron migration speed is correspondingly slower. At this point, the reaction of ions and electrons in the internal circuit costa rica number data adapts to the speed of electrons in the external circuit. In this environment, the potential of the two poles is almost the same as the equilibrium potential.
In fast charging applications, lithium ions are quickly disconnected from the positive electrode, which leads to an extremely high lithium ion concentration inside the battery. The sudden increase in lithium ion concentration causes a voltage mismatch between the active species inside the battery. When this happens and the stress reaches the threshold, it leads to the destruction of the active species and their damage, which not only shortens the life of the power battery, but also increases its internal resistance. Due to the increase in the internal resistance of the battery, the migration speed of ions and electrons in the internal circuit slows down.