In the production process of Prismatic battery modules, the OCV (open circuit voltage) sorting is a crucial step. This link not only concerns the improvement of the overall performance of the battery module, but also directly affects the safety and stability of the battery system. Hereinafter, we will conduct a detailed popular science introduction to the OCV sorting on the Prismatic battery module production line.
I. The importance of the OCV sorting
The OCV sorting is a key step in the battery module production process. Its main purpose is to accurately classify the batteries according to their performance by measuring the open circuit voltage (OCV) of the batteries to ensure that the performance of all cells in the battery module is similar, thereby enhancing the overall performance and service life of the battery pack. The OCV sorting is of great significance for the performance consistency, safety and service life of the battery module.
II. The working principle of the OCV sorting
In the OCV sorting, first, it is necessary to charge/discharge the Prismatic cells through a high-precision current source and voltage measurement system to obtain the open circuit voltage and internal resistance data of the cells. These data are key indicators for evaluating the performance of the cells. Subsequently, the built-in algorithm will analyze the performance of the cells to determine whether it meets the quality requirements. Based on the analysis results, the sorter classifies the cells according to the performance grade, and can achieve more than 10 groups of grading and pairing at most to ensure a high degree of consistency in the performance of the cells in the battery pack.
III.Technical characteristics of the OCV sorting
High-precision measurement: The OCV sorting adopts a high-precision current source and voltage measurement system to ensure the accuracy of the measurement results. At the same time, some high-end equipment will also integrate electrochemical impedance spectroscopy (EIS) testing to evaluate the state of the cells more comprehensively.
Intelligent analysis algorithm: The built-in algorithm can conduct big data analysis on the performance of the cells and continuously optimize the sorting standard to improve the pairing accuracy. This step involves big data processing and machine learning techniques to ensure the accuracy and reliability of the sorting results.
High degree of automation: The OCV sorting adopts an automated process to reduce human intervention and improve production efficiency. At the same time, the automated handling and packaging system ensures that the sorted cells can be accurately sent to the corresponding workstation for subsequent assembly or packaging.
Strong system traceability: The performance data of the cells tested by the system implements a database management mode and is saved for a long time with strong traceability. Combined with the data analysis function of the software, it can conduct long-term monitoring and analysis of the product performance quality to guide the improvement of the R & D formula and the improvement of the production process.
IV. The role of the OCV sorting
Improve battery performance consistency: Through strict sorting, cells with abnormal performance are eliminated to ensure that the performance of all cells in the battery pack is similar, prolong the battery cycle life, and improve the overall output power and energy density.
Optimize production efficiency: The automated process reduces human intervention, speeds up the production tempo, and at the same time reduces human errors, improving the overall production efficiency and quality control level.
Reduce system cost: Accurate pairing reduces the compensation design due to battery inconsistency, such as the complexity of the balancing circuit, thereby reducing the cost at the system level.
Strengthen safety: Eliminate potential faulty cells and reduce the risk of thermal runaway to ensure the safety of the use of the battery system.
To sum up, the OCV sorting has a pivotal position in the production process of Prismatic battery modules. Through high-precision measurement, intelligent analysis algorithm and highly automated operation, it ensures the high degree of consistency and safety of the performance of the cells in the battery module and provides stable and reliable energy support for new energy products.
Huiyao Laser Technology (Luoyang) Co., Ltd. is a high-tech enterprise focusing on the research and development, manufacture and sales of equipment in the new energy industry. Relying on the support of scientific research institutions such as the Luoyang Research Institute of Dalian University of Technology, the company has built a highly skilled R & D team and is committed to providing customers with comprehensive high-end intelligent equipment such as laser welding equipment, cell assembly line equipment, module PACK automatic line equipment, battery structural parts automation equipment, etc., and can customize the most suitable production line solution according to the different production needs of the customer enterprises.
The company covers an area of more than 10,000 square meters, has multiple automated production lines and advanced processing equipment, and has IS09001 quality management system certification and ISO14001 environmental management system certification. The company actively promotes the standardized production mode, improves product quality management and after-sales service guarantee, and is committed to providing customers with reliable products and high-quality services. We adhere to the concepts of innovation, excellence and reliability, and continuously promote the progress and development of technology. By choosing us, you will obtain the most cutting-edge technical support, the best product quality and the most intimate service guarantee. Let's join hands and jointly open up the brilliant future of the battery PACK production line and contribute our strength to the global energy cause!
