-Introduction to the protective functions of lithium-ion battery BMS

Introduction to the protective functions of lithium-ion battery BMS
author:enerbyte source:本站 click291 Release date: 2023-06-08 09:13:20
abstract:
The power lithium-ion Battery management system can effectively monitor, protect, balance energy and alarm faults of the lithium-ion battery pack, thus improving the working efficiency and service life of the entire power lithium-ion battery pack. Lithium ion batteries are widely used in vario...

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The power lithium-ion Battery management system can effectively monitor, protect, balance energy and alarm faults of the lithium-ion battery pack, thus improving the working efficiency and service life of the entire power lithium-ion battery pack. Lithium ion batteries are widely used in various precision equipment due to their advantages such as high working voltage, small size, light weight, high energy density, no memory effect, no pollution, small self discharge, and long cycle life.

When the smart battery is in a charging and discharging state, if the detected current exceeds 3A and still exceeds 3A after a 0.2s delay, it is judged as overcurrent. At this point, the protection execution circuit cuts off the discharge protection switch. The condition for removing the protection is to connect the charger. When a connected charger is detected, remove the overcurrent protection, otherwise the smart battery will always be in a protected state.

The BMS Battery management system is mainly responsible for controlling the charging and discharging of batteries and realizing the functions such as battery status estimation, and realizing battery status monitoring, battery status analysis, battery safety protection, energy control management, and battery information management.

Lithium ion batteries have defects such as poor safety and occasional explosions. Especially lithium-ion batteries with lithium cobalt oxide as the positive electrode material cannot discharge at high currents and have poor safety. In addition, almost all types of lithium-ion batteries will cause irreversible damage to the battery cell if overcharged or discharged excessively. Lithium ion batteries are also extremely sensitive to temperature: if used at excessively high temperatures, it may cause electrolyte decomposition, combustion, and even explosion; Low temperature will significantly deteriorate the performance of lithium-ion batteries, affecting the normal use of the equipment.

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