▲Simplified flowchart of cylindrical battery production line
The development of batteries has a history of nearly two hundred years. Lithium-ion batteries, with their numerous advantages such as fast charging and discharging, long cycle life, and no memory effect, have become the first choice for large-scale applications in today's digital products and electric vehicles. With the booming development and widespread use of the industry, the requirements for the quality and safety of lithium batteries have become more stringent. Therefore, as a crucial checkpoint for battery safety, the importance of battery testing equipment is becoming increasingly prominent, and OCV testing, located at the back end of the lithium battery production line, is a key link in this process.
▲OCV test diagram
Open circuit voltage (OCV) testing equipment is used in the lithium battery formation and packaging stage and can be used to test cylindrical, pouch, and prismatic power batteries. Its purpose is to detect the battery's state of health (SOH). By measuring and analyzing the open circuit voltage, internal resistance, and insulation voltage between the negative electrode and the casing of the finished battery, it determines whether the battery's condition meets performance indicators, thereby classifying the batteries and ensuring their overall performance.
▲Simplified diagram of OCV testing equipment assembly
Future potential of lithium-ion battery OCV equipment: As a battery health status detection unit, further standardization would allow it to become a modular standard machine that can be embedded in battery production lines, reducing development difficulty for equipment manufacturers and shortening the development cycle of individual machines. Horizontal extension to modular design across the entire production line would make production line setup, relocation, and maintenance more convenient for end users, making it easier to achieve the optimal total value of lithium battery production lines.
Current pain points of lithium-ion battery OCV equipment:
1. Pulse circuits involve more cables, are more complicated to assemble, and take longer to perform electrical tests;
2. High hardware and terminal maintenance costs;
3. Difficulty in customizing process algorithms;
Leadshine has deeply listened to the requirements of the lithium battery industry for motion control of OCV equipment and launched an EtherCAT bus motion control solution that combines "control + vision + servo + stepper": it can achieve import substitution of core components, optimize system routing, support customized process algorithms, improve equipment load capacity, and enhance test stability.
Motion control solutions
Solution advantages
Save costs and increase efficiency by more than 20%
The EtherCAT bus PLC overall solution offers convenient wiring, easier electrical assembly, and reduces electrical assembly and debugging time by more than 20%.
Based on the EtherCAT bus, it supports remote communication modules, enabling remote equipment testing, reducing on-site maintenance, and lowering overall maintenance costs.
Powerful functions and strong competitiveness
The PMC600 medium-sized EtherCAT bus PLC cluster can cover the required number of devices, handling everything with a single unit. It features abundant PLC communication interfaces, allowing operation on different local area networks and facilitating data exchange with the MES server.
A complete hardware and software solution (PLC + vision + servo + stepper) can help equipment enhance its competitive advantage.
Extensive application experience reduces programming time by 30%.
We provide professional guidance on modular programming (rotary, assembly, robotic arm, and host computer communication modules) (reducing programming development time by 30%).
⚫Supports customized process algorithms.
Core of the solution
For any questions regarding product selection or application, customers can call Leadsun's technical hotline at 400-885-5501 for consultation. Senior engineers with over 10 years of experience will be available to answer your questions. Leadsun will provide our partners with optimal hardware solutions and supplementary software services through comprehensive solution-level cooperation.
