Lithium-ion battery BMS management system is not as optional as some battery production companies say, but must have, lithium-ion battery management system at home and abroad has been a lot of research, and began to be applied in many areas, has been able to meet some of the market to be, lithium power lithium battery applications on the battery management system to put forward higher requirements, to protect the safety of the use of power lithium battery pack, is the lithium power lithium battery The primary task of the management system.
BMS lithium-ion battery management system can real-time detection of power lithium-ion battery voltage, current, temperature and other parameters, to achieve thermal management of power lithium batteries, equalization management, high voltage and insulation detection, and can calculate the remaining capacity of power lithium batteries, charge and discharge power, as well as SOC & SOH status.
The important task of BMS lithium-ion battery management system is to ensure the design performance of the battery system, which can be broken down into the following three aspects.
1) Safety, to protect the battery cells or battery packs from damage and prevent safety accidents.
2) Durability, which keeps the battery working in a reliable and safe area and prolongs the life of the battery.
3) Power, to maintain the battery working in a state that meets the requirements of the vehicle.
The functions of BMS lithium-ion battery management system usually contain the following main functions.
1) Overcharge protection, lithium-ion batteries are not allowed to overcharge, according to the characteristics of lithium-ion batteries, the battery is allowed to charge in a specific voltage region, if exceeded that is to break the charging circuit to ensure the safety of lithium-ion battery charging.
(2) over-discharge protection, lithium-ion batteries in addition to not over-charge, over-discharge can also cause serious damage to lithium-ion batteries, over-discharge and over-charge similar, set the trigger switch in a low voltage range, below this voltage value is to disconnect the discharge circuit.
(3) overcurrent protection, lithium-ion battery overcurrent protection includes charging current and discharge current protection.
4）Temperature protection, read the temperature value, and when the specified value is reached, the circuit is disconnected or other protective actions are executed.
(5) balanced charging, for lithium-ion batteries can have a longer service life, balanced charging of the battery.
(6) communication function, communication function is not essential, mainly used for recording and transmission of battery status data protocol.
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