A design scheme of lithium battery automatic gluer control system
1 Introduction
As the state's support for the new energy vehicle industry increases year by year, its core energy field - power lithium battery will enter a high-speed period of industry development. Compared with traditional energy batteries, lithium batteries have the characteristics of high energy density, light weight, long service life, green environmental protection, and high recycling rate. At present, two manufacturing processes are mainly used in the manufacture of lithium batteries, one is winding and the other is lamination, and the lamination process is often used to manufacture large-capacity new energy lithium batteries. The core component of the laminated lithium battery - the last process of the battery is the glue. As customers' requirements for product technology level, efficiency and quality are getting higher and higher, traditional manual gluing can no longer meet the requirements of modern production, so the research on efficient and automatic gluing machine is an urgent requirement of the market. This paper focuses on a PLC-based lithium battery automatic glue machine control system, and elaborates on the hardware and software design of the system.Also read:oem lifepo4 10kwh supplier
- The working principle of lithium battery automatic glue machine
Lithium battery automatic gluing machine is a fully automatic packaging equipment with automatic reclaiming, gluing, short circuit detection and unloading functions.
Its working principle is to automatically prepare tape while the automatic lamination machine produces lithium battery cells. The specific steps involved in this process are five processes of laminating, laminating, pulling, cutting and vacuum adsorption. After the stacking machine produces the lithium battery cells, the battery cell manipulator takes out the cells on the stacking table, and transfers them to the gluer under the gluer through the screw rod for glueing. Due to the relatively large volume of the batteries produced by the lamination process, sticking one tape often cannot achieve the purpose of tightening the cells, so three sticking processes are designed here.Also read:48v battery lifepo4 supplier
After each glue is applied, the cell moves a certain distance (the distance can be set through the touch screen), and at the same time the automatic glue applicator prepares the tape. After the preparation of the tape is completed and the battery removal manipulator stops, the glueing process is performed, and so on. three times. Each time the glue is pasted, the photoelectric color sensor detects whether the tape is pasted. If the pasting tape is normal, proceed to the next process. If the pasting tape is abnormal, return to the previous pasting position and reapply the glue. After the taping process is completed, take the cell manipulator to transport the taped cells to the short-circuit test position, and use a short-circuit tester to perform a short-circuit test. If it is qualified, it will be transported to the unloading conveyor belt. material.
- Hardware design of electrical system
3.1 PLC selection
In the design of the automatic glue machine control part, considering that the glue machine has many processes and complicated operation, and PLC has the advantages of high reliability, strong control function, convenient programming, and easy operation, the author of this paper adopts programmable logic control. controller as its core control component. The control system adopts the SYSMAC CP1H-XA40DT-D type PLC produced by Omron Corporation of Japan. The CPU unit body of the PLC adopts DC24V power supply, DC24V input, transistor drain output, built-in input 24 points, output 16 points, and can achieve high-speed 4 axes of counter and 4 axes of pulse output. The basic instruction is 0.1 microseconds per step, the program capacity is up to 20K steps, and the instruction types are about 400. It is a powerful small integral PLC. Due to its compact structure, powerful functions and high cost performance, it is very suitable for the design of this system. Require.
3.2 Hardware configuration
The hardware configuration structure block diagram of the system is shown in the figure, including CPU unit, input (photoelectric position switch and adhesive detection sensor), operation panel (touch screen and indicator light), control element (servo driver and solenoid valve), executive components ( Servo motor, DC motor, cylinder) and other parts. Take the battery core motor to set the left limit, right limit and origin; there are two photoelectric position switches in each of the rubber pulling cylinder, the rubber cutting cylinder and the glue sticking cylinder to detect whether the cylinder is in place; the glue sticking detection sensor detects each sticking Whether the adhesive tape is attached to the cell.
As the operation interface of equipment control, the touch screen accepts the operation instructions from the operator and indicates the running status of the equipment, and communicates between the PLC and the touch screen through the RS232 communication cable. The electric core motor adopts a servo motor, which is controlled by a servo driver; the feeding motor adopts a DC motor; the solenoid valve adopts a two-position, five-way solenoid valve to control the advance and retreat of the cylinder.
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