-(2) Introduction to the protective functions of lithium-ion battery BMS

(2) Introduction to the protective functions of lithium-ion battery BMS
author:enerbyte source:本站 click280 Release date: 2023-06-08 09:17:32
abstract:
When the battery voltage exceeds 4.2v or the total voltage exceeds 16.8v during the charging process, it is judged that the battery is in an overcharged state. At this point, the protection execution circuit cuts off the charging protection switch. In the state of overcharging release, the voltage o...

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When the battery voltage exceeds 4.2v or the total voltage exceeds 16.8v during the charging process, it is judged that the battery is in an overcharged state. At this point, the protection execution circuit cuts off the charging protection switch. In the state of overcharging release, the voltage of each battery is less than 4V.

The BMS Battery management system can collect, process and store important information during the operation of the battery pack in real time, exchange information with external devices such as controllers, and solve key issues such as safety, availability, ease of use, and service life in the lithium-ion battery system. The important purpose is to improve the utilization rate of batteries, prevent overcharging and excessive discharge, extend the service life of batteries, and monitor the status of batteries. Simply put, it is a system for managing, controlling, and using battery packs.

The Battery management system is closely integrated with the power lithium-ion battery of the electric vehicle. It can detect the voltage, current and temperature of the battery in real time through sensors. At the same time, it can also conduct leakage detection, thermal management, battery balance management, alarm reminder, calculate the residual capacity (SOC), discharge power, report the battery deterioration degree (SOH) and residual capacity (SOC) status, According to the voltage, current, and temperature of the battery, algorithms are used to control the maximum output power to obtain the maximum driving range, and algorithms are used to control the charger for optimal current charging. Real time communication is carried out with the vehicle main controller, motor controller, energy control system, vehicle display system, etc. through CAN bus interface.

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