After the automatic loading of the conveyor belt and the grabbing by the robot, the identity data information of each cell is recorded at the beginning, and after the automatic cell polarity detection, sorting and matching, it enters a series of subsequent assembly and testing processes such as air tightness detection and BMS (battery management system) software flashing according to the module and process requirements...... Until the heart of electric vehicles - power battery packs appeared in front of our eyes.
Under the rapid storm of the global new energy vehicle revolution, the power battery is the core "power source", and mastering the battery module and pack technology will surely become an important part of the new car-making forces to win the competition in the new track in the future. Similarly, in this typical assembly manufacturing application, automation/digitalization technologies, such as communication solutions for bus modules from Balluff, are helping manufacturers to more easily navigate the dream of new energy battery manufacturing.
01The power of digitalization
From the battery cell to the module to the PACK lithium battery pack, it needs to go through a complete set of assembly and testing processes. Starting from the automatic feeding of battery cells, through the main processes such as cell sorting, screwing, assembly, welding, cleaning and testing, warehousing, and string PACK, a number of cells are formed into modules, and then a number of units are composed of PACK, and 10-20 stations of each line can realize the seamless integration of production links with the help of automation equipment and control systems.
Take the PACK stage as an example
Taking the PACK stage as an example, the PACK includes battery packs, busbars, soft connections, protection boards, outer packaging, output (including connectors), barley paper, plastic brackets and other auxiliary materials. For PACK battery packs, the air tightness testing process and software flashing process are important links, which directly determine the quality and safety compliance of the battery.
On the one hand
On the one hand, it is necessary to ensure the good sealing of the PACK through the air tightness test, so as to avoid safety such as when the car wades in water.
On the other hand
On the other hand, through the BMS control code flashed into the CMU and BMU, the battery status information data collected during the battery test and use process can be processed and analyzed by the electronic control unit, and then the control instructions are issued to the relevant functional modules in the system according to the analysis results, and finally the information is transmitted to the outside world. This is a necessary way to reliably ensure the power of new energy vehicles.
Automating and digitizing these key equipment processes has become an important technological enabler for the entire battery production process.
02A bridge to communicate digitalization
Since the birth of digital bus technology, it has swept most factory automation applications with its huge advantages over analog communication technology. As a leading provider in this field, Balluff has provided the Chinese leader in new energy batteries with an IO-level solution for digital acquisition and communication. These include the CC-Link main module BNI CCL-502-100-Z001, the switching acquisition module BNI IOL-302-002-K006, and the RFID processor BIS V-6111-073-C003.
On the battery PACK assembly line of the factory, RFID is deployed from bottom to top to trace the assembly information of each process, which is used to collect the IO signal IO-Link slave module and the CC-Link bus IO master module, so as to realize the safety loop requirements of the connected safety loop based on the output power supply of the control module.
The use of distributed installation of the bus IO level solution has brought many important benefits to the enterprise, such as, more flexible and efficient wiring to help rapid operation, strong IO expansion ability can reduce the number of fieldbus module nodes, save installation space in the cabinet and bring cost savings, in operation and maintenance, the on-site switching signal can be collected to the greatest extent, easy maintenance, rapid fault diagnosis, thereby reducing the number of downtimes, etc., Of course, all of this is also supported by the excellent Balluff project team.
At a time when the production of new energy batteries is in full swing, the bus module-based digital communication solutions from Balluff are in fact helping customers in this field to build a bridge to communicate the future of digitalization.
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