The 48V lithium ion battery protection board is the circuit board for protection. It is mainly composed of electronic circuits, which can accurately monitor the voltage of the electric core and the current of the charging and discharging circuit at all times under the environment of - 40 ℃ to+85 ℃, and timely control the on-off of the current circuit. The lithium battery protection plate can protect the series and parallel battery packs from charge and discharge, and can detect the overvoltage, overcurrent, over temperature, undervoltage, and short circuit of each single battery in the battery pack, so as to prolong the service life of the battery and avoid battery damage due to over discharge. Lithium battery protection board is an indispensable part of lithium battery.

　　The 48V lithium ion battery management system (BMS) determines the status of the entire battery system by detecting the status of each single battery in the lithium battery pack, and makes corresponding control adjustments and policy implementation for the lithium battery system according to their status, so as to realize the charge and discharge management of the lithium battery system and each single battery to ensure the safe and stable operation of the lithium battery system.

　　The lithium ion battery management system consists of a management host (CPU), a voltage and temperature acquisition module, a current acquisition module and a communication interface module.

　　It can detect and display the total voltage, total current and reserve capacity of the lithium-ion battery pack; Voltage of any single battery and temperature of battery box; The highest and lowest single battery voltage and battery number, the highest and lowest temperatures, and the charge and discharge capacity of the battery pack.

　　4 The lithium ion battery host also provides alarm and control output interfaces for over-voltage, undervoltage, high temperature, low temperature, over-current, short circuit and other extreme conditions.

　　RS232 and CAN bus interfaces are provided, and all information on the lithium battery management system can be read directly on the computer.

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