During use of lithium-ion batteries, protection circuits are required, including overcharge protection, overcurrent/short circuit protection, and overdischarge protection. During battery use, overcharge, overdischarge and overcurrent will affect the service life and performance of the battery. In severe cases, it will cause the lithium-ion battery to burn or explode. Therefore, each lithium-ion battery must be installed with a safety protection board, which is composed of a dedicated IC. and several external components. The protection loop effectively monitors and prevents damage to the battery, preventing dangers such as burning, explosion, etc. caused by overcharge, overdischarge, and short circuit. Lithium-ion battery protection circuits and their management systems have a market worth billions of dollars every year, and the market potential is huge.

　　The battery management system is an essential and important component of new energy vehicles. Together with the power battery pack, it forms a battery system to provide power for new energy vehicles. The specific tasks of the battery management system mainly include collecting data from the individual cells in the battery pack, communicating data with other vehicle components, estimating the working status of the battery pack (including the battery's state of charge and health status), and implementing thermal management of the battery. Management, cell balance between battery packs, battery system fault diagnosis and alarm, etc. 6 items, and some also have charging management capabilities.

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