Lithium battery production process is relatively long, the production process has more than 50 processes, the corresponding need for more than 50 kinds of equipment to complete the manufacturing of each process. The process link determines the lithium battery equipment complex, strong specificity. In response to customer demand, lithium electric equipment from single sales to segment integration, and then to the whole line integration, and finally the development of automation of the whole line integration.
The whole line layout is the development trend of lithium equipment industry, with the strength of the company is accelerating the layout of the whole line capacity.
However, there is still a certain gap between domestic equipment and advanced equipment in Japan and South Korea in the level of automation. This gap is reflected in two aspects:
(1) The automation level of a single device is not high, and many devices are operated manually or semi-automatically;
(2) The automation level of logistics is not high, and the battery cells need to be taken, placed and handled manually. Most domestic rear end equipment manufacturers are small in scale, and most enterprises can only provide charging and discharging machines and other equipment passively according to customer requirements. Few enterprises have the ability to design and integrate complete post-processing systems, and they lack experience in automatic logistics equipment that integrates machinery, electronics, electricity, materials, information, automatic control and other aspects. Therefore, the future direction of progress of domestic equipment manufacturers, in addition to the stability and efficiency of equipment machinery, the algorithm and design ability of software need to be improved.
At present, some domestic manufacturers have the ability to independently develop automated logistics lines, and further develop and strengthen the integration and application of post-processing systems and automated logistics lines, so as to lay a foundation for the future construction of unmanned and efficient automated post-processing systems.
The application requirements of automation and integration for motion control products tend to be high speed, high precision and high reliability
1. Motion control products are widely used in lithium production and will usher in a huge development space
The upstream of lithium equipment industry includes steel, metal wire, paint, PLC, servo, motor, sensor and other industries, and the downstream industry is mainly lithium ion battery industry. The production line of lithium battery is a large-scale process including electrode production, cell synthesis, chemical packaging and packaging inspection
From the field of power battery analysis, the current power lithium battery cell manufacturing is mainly divided into two processes: winding and laminating. The cylindrical and square batteries are mainly produced by winding process, and the soft pack battery is mainly produced by laminating process.
In terms of winding technology, according to the operation mode of the machine, the winding machine can be divided into manual winding machine, semi-automatic winding machine and automatic winding machine. The lithium production link is complex, including many links, will use a large number of motion control products. With the continuous expansion of the power battery market, the market demand for lithium winding machine bursts out. In the next period of time, in the field of lithium battery equipment, the motion control market will also usher in a huge development space.
2. The technical difficulties of winding require motion control technology to tend to high speed, high precision and high reliability
Production belongs to an important link in the lithium battery processing process, used to produce the positive electrode or negative electrode of the battery, this link of automatic production machine winding technology as an example, to see the lithium production of motion control equipment application technology requirements and difficulties. As follows:
(1) Automatic unwinding: the system through the potentiometer output analog conversion to speed control, the front traction speed increases, the storage area swing rod Angle becomes larger, the potentiometer output analog speed becomes larger synchronous adjustment, slow then slow, keep synchronization, so as to realize automatic unwinding control.
(2) Traction adhesive: position control, photoelectric scanning pole surface rising edge signal, to the PLC, interrupt trigger, a certain number of pulses to the servo fixed length operation.
(3) Automatic correction: the correction sensor output analog speed control, by measuring the position of the pole into the induction area sampling change to output signal, the system uses this change signal to control the servo drive the whole mechanism to constantly adjust the position of the incoming material, so as to realize automatic correction.
(4) Automatic winding: the potentiometer output analog speed control, the incoming traction speed increases, the storage area swing rod Angle becomes larger, the potentiometer output analog speed becomes larger, slow then slow, so as to realize automatic winding control. Must pay attention to the winding surface tension to adjust the appropriate, otherwise easy to cause the diameter is not tight, or both sides of the elastic not burst phenomenon.
It can be seen that the requirements of lithium electric winding technology for controller, servo driver, sensor and other control equipment are becoming higher and higher. For example: high performance drive, short dynamic response time, fast and accurate position control, easy debugging, flexible operation, short response time of interrupt positioning, no need to slow down operation, no need for deceleration sensor. The servo motor needs large inertia, large torque, compatible with the installation size of the stepper driver, a large enough starting torque output at low speed and smooth operation, so as to minimize the intermediate link in the connection with the mechanical movement part, stronger durability and higher stability.
And in the whole lithium production system operation will use a large number of motion control technology, motion control products play a vital role.
Domestic motion control enterprises have also focused on lithium as a development industry.
At present, Zhongweixing for the lithium equipment market, can provide including coating, winding, lamination, die-cutting, coating, chemical and other processes, including personalized motion control efficient solutions, recognized and favored by customers.
First of all, Zhongweixing gives lithium battery devices a super brain, and uses Zhongweixing AMC1600E bus controller to realize data interaction between EtherCAT bus and peripheral devices, and the communication cycle can be configured arbitrarily, making the communication more efficient and real-time.
AMC1600E adopts PLC control mode, compatible with IEC61131-3 standard, and supports IL, FBD, SFC, ST, LD and other five programming languages. And provides the motor control commands defined by the PLCOpen specification, including Part1/2 functions and some Part4 functions. Support PTP, Gear, CAM, linear interpolation, arc interpolation instructions.
In addition, in the rear section, Zhongwexing SCARA robot and vision can continuously empower the labeling, packaging, transportation, warehousing and other process links of the rear section.