Equipment required for assembling and producing 18650 lithium batteries.
The production of 18650 lithium batteries includes both front-end and back-end. This article is not about producing lithium batteries, but about how to make lithium battery packs, in other words, the equipment required for assembling 18650 lithium batteries.
A brief overview of the lithium battery pack process:
Testing of purchased battery cells>>>Cell pairing>>>Paste barley paper>>>Lithium battery spot welding>>>Comprehensive testing of finished products>>>Aging testing of finished products
The corresponding equipment includes: battery sorting machine>>>battery pasting barley paper machine>>>battery spot welding machine>>>finished product comprehensive tester>>>finished product aging cabinet
1、 Cell detection and cell pairing
The required equipment includes a capacity tester and an automatic cell sorting machine.
Some friends may ask why there is still a need for cell testing and pairing when the battery cells purchased from outside have already been sorted by the battery cell factory. Isn't this unnecessary?
In fact, it is not the case. In theory, battery cell factories need to be kept at a constant temperature and humidity for more than 15 days before leaving the factory, but many battery cell factories do not carry out this process. Moreover, the transportation, loading, and unloading of battery cells can also have some impact on voltage and internal resistance to varying degrees. So, in order to ensure the consistency of the battery cells, it is necessary to perform automatic cell sorting.
Capacity tester: detects the cell capacity, rate, number of cycles, and whether it meets the usage requirements
Battery automatic sorting machine: Screen and pair the battery cells according to the set interval range to ensure the consistency of the internal resistance and voltage of each string and unit of the battery
2、 Lithium battery sticker machine for barley paper
The function of the automatic barley paper pasting machine is to insulate 18650 batteries. After sorting the battery cells, the next step is to use the barley paper machine to paste insulation surface pads for lithium batteries. The lithium battery is rotated to a fixed position, and then the cutting blade of the barley paper pasting machine itself will cut the barley paper, thus completing the process of pasting barley paper.
3、 Lithium battery spot welding machine
The barley paper has been pasted, the next step is to spot weld the lithium battery. After setting the parameters of the lithium battery spot welding machine, place the mold with the lithium battery installed on the spot welding machine operating platform. The spot welding machine performs spot welding according to the parameters you set. Generally speaking, as long as the front bracket is properly assembled, there will be no problem with welding it out. After spot welding in this way, the semi-finished lithium battery needs to be equipped with a lithium battery protection plate, and the lithium battery needs to be charged, discharged, and aged for testing.
4、 Finished product comprehensive tester
The lithium battery comprehensive testing equipment is a device that quickly and accurately tests the performance of finished batteries. The system uses a 32-bit ARM processor and a 16 bit AD converter for voltage and current. Compared with similar devices, it has faster testing speed, higher testing accuracy, and supports simultaneous operation of multiple devices. Widely used in the production and scientific research and experimental testing of power battery packs for automotive electronics, aerospace, ships, solar energy storage, electric bicycles, electric motorcycles, backup power batteries, communication power supplies, etc.
The main functions of lithium battery comprehensive testing equipment are:
Open circuit voltage, AC internal resistance, discharge test, discharge overcurrent test, short circuit protection test, charging test, charging protection test, etc.
5、 Finished product aging tester
Check whether the battery is qualified by charging and discharging cycles of the battery pack
1. Charging function: with constant current and constant voltage charging function
2. Discharge function: with constant current discharge function
3. Charging and discharging interface: fully meets the requirements of copper buckle and charging and discharging port for battery pack charging and discharging
4. Check voltage protection: By charging and discharging the battery, it is possible to detect whether the charging protection and discharging protection of the battery are working.
5. Record the charging capacity and discharging capacity, and view the aging curve of charging and discharging
6. Control system
The software system of the aging tester adopts the classic and mature C/S mode, with two communication methods: serial port and network. Serial port can achieve accurate communication among several instruments over short distances, while network can achieve accurate communication among multiple instruments over long distances. In network mode, one server can control up to 254 instruments, achieving unified operation of multiple instruments.
7. Management software
Based on the Windows operating interface, MYSQ database is used to store test data, which greatly facilitates staff to query and export data online. Charge discharge aging curve graphs can be viewed by battery barcode code, time, and device number, and curve graphs can also be exported.
