The quality of lithium battery is mainly determined by the quality of lithium battery core, battery technology and pack technology.
1. Use high-quality lithium iron phosphate core
The cell assembly of lithium iron phosphate battery is an important link in battery manufacturing. It is directly related to the capacity of the battery, the first efficiency of the battery and the storage capacity of the battery.
Lithium iron phosphate (LiFePO4) is used as the energy storage lithium battery, with high safety. The product has the advantages of light weight, small volume, long service life up to 1500 times, and longer service life under floating charging conditions.
2. Lithium battery protection board
The product is mainly composed of PCB, FET, NTC, PTC, capacitor, resistor, diode, triode, etc.
Overcharge protection: when a series of voltages exceed (overvoltage), the IC will control the CMOS to turn off the charger, so as to protect the battery.
Overload protection: when a series of voltages are below the lowest (undervoltage), the IC will control the DMOS to turn off or discharge.
Overcurrent and short circuit protection: when the battery P + and P output exceed the overcurrent / short circuit, the control circuit controls the DMOS to open the electric loop and stop discharging.
High and low temperature protection: after the temperature sensor reaches the limit value, it reaches the delay protection, and the control circuit controls to close and stop charging and discharging.
The lithium battery protection board also has the functions of power detection, power display, battery status display, communication and remote control. If the voltage of the lithium battery pack is lower than the alarm value, there will be alarm information. If the voltage is too low, the power will be automatically cut off to protect the battery (the specific function of the protection board needs to be communicated with the manufacturer).
3. Box structure
According to the requirements of the electrical equipment, the shell structure matched with it is designed, usually including plastic shell, metal shell, simple PVC heat shrink, etc.
4. Lithium battery pack process
For the lithium iron phosphate battery pack, the excellent performance of pack is very important. Good equipment, experienced technical personnel, mature management mode and strict manufacturing requirements are required to ensure that the lithium battery pack will not be neglected in important links such as welding, testing, aging and pre shipment inspection, and the quality of the produced lithium battery pack can be guaranteed.
The above is the high-quality and high-quality energy storage battery pack. The BMS battery management system makes full use of the advantages of lithium battery such as high energy density, high temperature, high charge and discharge performance and green environmental protection. It has the characteristics of real maintenance free and long service life.