How to assemble high quality lithium iron phosphate battery?
The energy storage system matched with lithium iron phosphate battery has become the mainstream choice in the market. In order for the lithium battery to meet the actual application requirements, it must be assembled into a lithium battery pack. How to assemble lithium iron phosphate battery pack? The editor of Cuneng Electric has organized several key points for lithium battery assembly, hoping to be helpful to everyone.
How to assemble high quality lithium iron phosphate battery?
For the lithium battery pack, its quality depends on the quality of the lithium battery cell used, the process level of the lithium battery plate, and the PACK process level. The quality of the lithium iron phosphate battery pack will not be poor if the three aspects are well done.
1. Use high quality lithium iron phosphate cores
The cell assembly of lithium iron phosphate battery is a key link in battery production, which has a great impact on the battery capacity, the initial efficiency of the battery and the storage performance of the battery.
The lithium iron phosphate battery group should be composed of first-line lithium battery cells. The energy storage lithium battery is made of lithium iron phosphate (LiFePO4) material with good safety performance. The specification of the single cell is 3.2V/20Ah, with small volume and light weight. The cycle life of the group can reach over 1500 times, and the service life is longer under floating charge working conditions.
2. Lithium battery protection board.
The core components of lithium battery protection board are composed of circuit board, MOS transistor, NTC, PTC, capacitor, resistor, diode, transistor, etc.
Overcharge Protection: When a string of voltage in the lithium iron phosphate battery group exceeds the maximum value (overvoltage), the IC controls the CMOS to turn off the charging circuit to achieve protection.
Overload protection: When one string of voltage in the lithium iron phosphate battery pack falls below the minimum (undervoltage), the protection standard is reached and the IC controls the DMOS to turn off the discharge circuit.
Over-current and short-circuit protection: When the output current of the lithium battery pack P+ and P- exceeds the overcurrent/short circuit current value and reaches the overcurrent/short circuit delay, the control circuit controls the discharge DMOS to close the discharge circuit 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 functions such as power detection, power display, battery status display, and remote communication control. If the voltage of the lithium battery is lower than the alarm value, an alarm message is displayed. If the voltage is too low, it will automatically turn off to protect the battery (specific functions of the protection board must be communicated with the manufacturer).
3. Box structure.
According to the requirements of electrical equipment, design corresponding shell structures, usually including plastic shells, metal shells, simple PVC heat shrink, etc.
4. Lithium battery PACK process
For the lithium iron phosphate battery pack, the excellent performance of PACK is crucial. Good equipment, experienced technicians, mature management mode and strict manufacturing requirements are required to ensure that there are no omissions in the welding, testing, aging, pre-shipment inspection and other important links of the lithium battery pack, so that the quality of the produced lithium battery pack can be guaranteed.
Conclusion: The above are several aspects that should be paid attention to when assembling high quality and high value lithium iron phosphate battery.
