XW-5V20A128CH37 Prismatic Battery Cell Vacuum Negative Pressure Forming Machine

1. Equipment Introduction

1.1 Introduction to equipment structure and working principle

1.1.1 Equipment Overview

This equipment is mainly used to test the voltage, capacity and other parameters of the negative pressure formation/ capacity division of square aluminum shell batteries, and completes the negative pressure formation process of the battery through a negative pressure vacuum system. It has a negative pressure reflux function and can classify the battery and perform data analysis and upload and share it according to the test results. It adopts an open-frame self-clamping tray electric clamping mode, a double-sided four-door structure, each door is divided into four layers, each layer has 8 battery stations, a total of 128 stations.

1.1.2 Equipment Features

1. The equipment is divided into two parts, the power supply host part and the open frame self-clamping tray structure part.
2. The circuit part is mainly composed of a mid-position machine board, a 30A constant current and constant voltage module, a bidirectional inverter switching power supply, a keyboard board, a PLC, a touch screen, etc.
3. The power supply uses an intelligent bidirectional power supply with PFC filtering and built-in filtering.
4. The circuit part adopts hardware bidirectional DC/DC design, which has high efficiency, fast response speed, comprehensive protection measures, low heat generation and more stable performance. The voltage and current calibration values of each motherboard are saved independently and can be replaced at will without adjusting the accuracy separately.
5. It has data acquisition and TC/IP communication or 485 communication functions, and the minimum data recording interval can reach 1S.
6. Supports automatic calibration function, which can automatically calibrate the accuracy through tooling and output it into a report.
7. With database interface function, the capacity sharing data can be automatically uploaded to the data server.
8. It has complete safety protection functions, including emergency stop, capacity protection, power failure continuity, offline operation and other functions.
9. It has complete channel protection functions, including over-capacity protection, over-voltage, under-voltage protection, voltage and current fluctuation protection, battery reverse connection protection, over-current protection, trend protection, expected voltage and current protection functions.
10. The electric clamping method is adopted, and the battery cell pole is in direct contact with the clamp.
11. The contact surface is designed with teeth for better contact.
12. The probe fixture/chip fixture line is fastened by screws and directly connected from the power module mainboard to the probe, reducing the risk of poor contact caused by line switching and improving efficiency. The line and the probe correspond one to one, which is convenient for maintenance and replacement.
13. The battery probe module is responsible for reliably connecting the positive and negative poles of the battery during charging and discharging to form a test circuit.
14. The device scans the code manually.

1.1.3 3D Appearance

Equipment engineering plan (size is for reference only, the actual size shall prevail)

Equipment size: length × width × height = 1950mm × 1093mm × 2032mm

1.1.4 Equipment workflow diagram

Negative pressure vacuum system working process description:

1. First load the battery into the self-gripping tray, then adjust the battery filling port to the specified uniform direction and prepare for testing.
2. After the battery is loaded into the equipment, turn on the drive cylinder switch, and the cylinder drives the probe clamp assembly and the vacuum suction cup assembly to clamp the battery up and down. At the same time, there is no gap and seamless connection between each battery filling port and the vacuum suction cup.
3. After the battery probe fixture is clamped and the vacuum suction cup is connected to the battery injection port, open the vacuum regulating valve and set the vacuum valve to -90kps (or the process setting value can be adjusted to -100Kpa to 0Kpa during the negative pressure process), and check the vacuum degree in the vacuum gauge within the specified time (if the value in the vacuum gauge does not reach -90kps, please check whether there is leakage between the battery injection port and the vacuum suction cup or other connections). A pressure gauge is bypassed in the negative pressure unit pipeline to display its pressure value. It is installed in a convenient and visible area for easy observation.
4. After checking that the air tightness is qualified, start the formation charging process and the negative pressure vacuum system.
5. When the formation charging process is completed or the device has an abnormal alarm, first close the vacuum valve to release the vacuum state, and then unload the battery or handle the problem.
6. After the formation and charging is completed, first close the vacuum regulating valve, then close the pneumatic switch of the fixture, and then remove the battery tray, and the formation is completed.
7. During long-term operation of the equipment, it is necessary to frequently check whether the vacuum suction cup and vacuum pipeline have crystallization. If crystallization is found, please clean or replace the accessories in time to prevent air leakage.
8. Vacuuming speed ≥50KPa/min; vacuum breaking speed ≥20KPa/s; leakage rate ≤1KPa/min (test after negative pressure extraction and pressure stabilization).

1.2 Main structure of the equipment

1. Open-frame negative pressure formation equipment for lithium batteries.
2. Computer with USB port (self-provided).
3. USB to 485 interface converter and communication line or TCP communication.
4. Battery scanning system.
5. Product software.

2. Product specifications and fixture types compatible with the equipment

2.1 Device compatible product specifications

Self-clamping tray, suitable for battery size: battery length 65mm-220mm; width 20mm-70mm; height 90mm-230mm; pole ear center distance 45-160mm. Cylinder 80-20. (Note: This equipment is custom designed, one model of negative pressure formation equipment only supports one specification of battery)

2.2 Tray or fixture type

37-128-30A partial schematic diagram (Note: the above tooling can only fit the battery size provided by the purchaser)

Customized fixture type

                                Negative pressure reflux cup (customized)