Background of the lithium battery industry

As a green and low-carbon energy, new energy is an important part of my country's multi-wheel drive energy supply system. It is of great 

significance to improve the energy structure, protect the ecological environment, respond to climate change, and achieve sustainable economic 

and social development.

Lithium battery technology is one of the important technologies in the future new energy field. It not only has the advantages of high energy 

density, safety, and reliability, but is also widely used in electric vehicles, energy storage, consumer electronics, and other fields. It is also one of 

the mainstream energy sources in the future.

01 Lithium battery coating machine

The scale of lithium battery coating machines accounts for 15-18% of the total scale of lithium battery equipment, which is one of the core 

production equipment of lithium battery equipment.

Driven by the rapid expansion of lithium battery production, the market scale of lithium battery coating machines has also continued to expand. 

Data shows that the global lithium battery coating equipment market scale in 2021 is 2.4 billion USD, a year-on-year increase of 59%; of which 

the Chinese market accounts for 72.4%, and the market scale is 1.8 billion USD, a year-on-year increase of 1.4 times.

In recent years, with the efforts of enterprises, the degree of localization of coating machines in my country has been continuously improved. 

According to GGII data: In 2021, the degree of localization of lithium battery equipment in my country exceeded 85%, of which the degree of 

localization of coating equipment exceeded 98%; my country's domestic coating equipment has gradually approached or surpassed Japanese 

and Korean companies in terms of coating speed, coating width, centralized procurement thickness, coating accuracy, and other aspects.

The coating process is a process based on the study of fluid properties. One or more layers of liquid are coated on a substrate. The substrate is 

usually a flexible film or backing paper. The coated liquid coating is then dried or cured in an oven to form a film layer with special functions. 

The main methods of coating lithium-ion battery pole pieces are currently comma roller transfer coating and slit extrusion coating.

The stability of coating speed and tension determines the thickness of the coated material and the quality of the product. The thinner the coated 

material, the higher the battery capacity per unit volume. The higher the speed, the higher the output and the lower the cost.

02 Application of Decowell remote I/O module in lithium battery coating machine

This project is for the lithium battery production process section in the new energy industry, used for positive and negative electrode 

pre-coating and positive and negative electrode slurry coating.

The line is about 80 meters long. Our EX series remote IO is used in the feeding unit, coating unit, back roller, drying, upper and lower molds, 

and a large number of digital and analog signals are used.

The equipment uses a Siemens 1512SP controller master station, with Decowell EX-1110 card-type remote IO, which is mainly responsible for 

the in-place signal of the position sensor and the temperature detection of the temperature controller. The 485 communication is mainly for 

MODBUS-RTU inverter reading and writing, which is used for the control of the drying box blower and exhaust fan.

This line has high requirements for the accuracy and response time of each station signal, adapts to the harsh working environment, and 

provides favorable guarantees for the stable operation of the coating line.

03 Decowell EX series remote I/O

Product features:

1. Stable communication, fast response, convenient operation, and high efficiency;

2. Rich bus protocols, supporting multiple communication protocols, such as EtherCAT, PROFINET, DeviceNet, CC-Link, Ethernet/IP, 

Modbus-RTU, CC-Link IEF Basic, etc.;

3. Rich signal types, which can meet factory automation and process automation control. Support digital quantity, analog quantity, 

temperature module, encoder module, free communication module;

4. Compact structure, small module size, a single I/O module supports up to 32 digital signal points;

5. Strong expansion capability, a single adapter can expand up to 32 I/O modules, and the coupler scans quickly;

6. Simple and easy to use, standard DIN35 rail installation, plug-in terminals, and tool-free installation.