Lithium-ion battery protection management system Lithium - Ion Battery Equipment

Lithium-ion battery protection management system -Lithium - Ion Battery Equipment

Due to the characteristics of the lithium-ion battery itself, it must be equipped with a protection board (PCM) or a battery management system (BMS) before it can be used. Lithium-ion batteries without protective plates or without a battery management system are strictly prohibited. Without a protective shield or battery management system, lithium-ion batteries can be a safety hazard and can even cause a fire or explosion. Safety always comes first when it comes to batteries and battery management systems.(Lithium - Ion Battery Equipment)

Regarding the complex power lithium battery system, the battery management system (BMS) is usually required to monitor the battery status in real time to ensure the safety of the battery and the system and improve the cycle life of the battery. A simple battery management system generally only refers to the protection function of the battery as a lithium-ion battery protection board (PCM), and an appropriate battery management system is selected according to the responsibility level of the system, application requirements and costs.

Lithium-ion battery management systems (BMS) generally include the following functions:

Li-ion battery protection (overcharge protection, overdischarge protection, overcurrent protection, etc.), voltage/current/temperature acquisition, power balance, SOC display, charge and discharge management, abnormal diagnosis, communication, etc.

The important functions of the fender are:

Overcharge protection, overdischarge protection, overcurrent protection, short circuit protection, power balance, abnormality detection, etc.

Li-Ion Battery Charging Requirements

The mainstream charging method of lithium-ion batteries is constant current and constant voltage charging (CC/CV: ConstantCurrentConstantVoltage, constant current and constant voltage), which is charged first with constant current and then with constant voltage. A good charger can charge via trickle current depending on the voltage state of the battery.

Chargers generally include AC and DC (AC and DC conversion), charging management modules, mobile phone chargers only have AC and DC modules, the technical term is called adapters, and the charging management modules are concentrated on the mobile phone motherboard. Like e-bikes, EV chargers are universal integrated adapters and charge management.

For example, like ordinary cobalt oxide lithium ion battery, detect the battery voltage is lower than 3.0V, start the trickle charger charging (about 0.1CC), in order to prevent damage to the battery, the charger, the battery voltage 3.0V to constant current (CC) Charge (about 0.5 degrees Celsius, the current size is determined according to the system), detect the battery voltage of 4.2V and convert it to constant voltage (CV) charging, when the battery current is about 0.1CC, after charging, close the charging system and charging circuit. First trickle, then constant current, and finally constant voltage. Of course, general chargers are not trickle charging.



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