Many engineers used lead-acid batteries or nickel-metal hydride batteries in the system before. These batteries do not need protection, so they may not understand why lithium batteries need a protection board (PCM/BMS).

　　The lithium battery protection board is a protection for the charging and discharging of the lithium battery, and detects the overvoltage, undervoltage, overcurrent, short circuit, and temperature status of each single cell in the battery pack. When some parameters of the lithium battery do not meet the engineer's setting values during use, the protection board will turn off the input or output of the lithium battery, so that the lithium battery is protected.

　　PCM adds a protective barrier to lithium batteries, making lithium batteries safer and longer service life.

　　Some users will also install smart chips, communicate through software such as CAN, RS485, Bluetooth, and record battery usage and status.

　　Unless in the design and production of lithium batteries, when the consistency can reach a perfect level, lithium batteries do not need a protection board.

　　At this stage, if there is no protective plate for the lithium battery, the service life of the lithium battery will not only be affected, but there will also be dangerous situations, such as explosion or fire.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect replacement for lead-acid batteries, and they are the first choice for grid-connected peak shaving, off-grid energy storage, photovoltaic energy storage, UPS, data center and other industries.