The Technology of the Industry | Lyric EIS Charge-Discharge Tester: The Core Tool in Battery Detection

In today's rapidly evolving new energy sector, accurate assessment of battery performance has become one of the key drivers of industry advancement. The latest EIS charge-discharge tester launched by Lyric, with its outstanding technical parameters and powerful functional features, offers a brand-new solution for battery R&D, production, and quality control.

Lyric's EIS charge-discharge tester, as a model of technological integration, achieves the coordinated operation of two processes by deeply merging traditional formation and grading functions with electrochemical impedance spectroscopy (EIS) detection technology. Its core functionalities encompass two aspects: Formation and Grading – Performing key processes such as battery charge/discharge activation and capacity sorting. EIS Testing – Acquiring critical parameters like SEI film impedance and charge transfer resistance in real time through electrochemical impedance spectroscopy, providing multidimensional data support for battery status analysis.

Lyric's EIS charge-discharge tester achieves high integration of EIS detection with formation and grading functions through seamless hardware-software coordination. This design significantly simplifies process configuration, supports flexible test flow adjustments, and ensures efficient and precise testing with detailed parameter settings and anomaly flagging capabilities. Compared to the efficiency losses caused by equipment switching and battery handling in traditional setups, this device optimizes the production process with its integrated architecture, delivering stable support for large-scale manufacturing.

High-Precision Detection: Comprehensive Scientific Analysis Across Full Frequency Bands

The equipment employs wide-band AC signals (0.1Hz to 200kHz) and high-precision sampling technology, combined with range adjustment functionality, to meet the impedance measurement requirements of various battery types including consumer-grade pouch cells, power-oriented prismatic cells, and blade batteries. The EIS detection features a wide excitation current input range with 4 adjustable ranges, achieving impedance measurement accuracy of ±1% and covering a frequency range from 0.1Hz to 200kHz. The charge-discharge function achieves voltage and current measurement control accuracies of ±0.04% FS and ±0.05% FS respectively, ensuring reliable data acquisition. Additionally, the equipment features polarity switching capability and offers up to 64 channels per power cabinet, meeting high-throughput testing requirements.

Multi-Type Anomaly Detection: Data-Driven Risk Warning
By analyzing battery parameters including ohmic resistance (Rs), SEI film resistance (Rf), and charge transfer resistance (Rct), the system can accurately identify over 10 types of faults such as internal short circuits, lithium plating, and consistency defects. The technology demonstrates outstanding sensitivity in formation, grading and structural defect detection:

• Formation Anomaly Identification: By comparing the impedance spectra of normal and abnormal batteries, the Rf value of abnormal batteries shows a significant decrease, indicating insufficient SEI film formation and effectively warning of formation defects.

• First-Cycle Efficiency Analysis: Batteries with low initial efficiency show decreased Rf and Rct values, demonstrating the correlation between first-cycle performance and electrochemical characteristics;

• ACT Polarization Testing: Cells with high polarization demonstrate increased Rf values, directly indicating polarization abnormalities

• Capacity Anomaly Identification: Low-capacity cells (1%) display prominent Rf value variations, offering scientific basis for capacity screening.

Intelligent Data Processing: Closed-Loop Management Enhances Manufacturing Efficiency

Test data is automatically analyzed and uploaded to the MES system, enabling real-time monitoring of battery status. The system supports channel selection, data comparison, and Nyquist/Bode plot display, with export capabilities for both image and Excel files to facilitate in-depth analysis. Meanwhile, the function of displaying work step information and detailed data, combined with intelligent impedance value calculation, ensures the accuracy and efficiency of data analysis. This closed-loop management mechanism not only reduces safety risks but also significantly improves production capacity and product yield rates.

A New Benchmark for Domestic Alternatives: Addressing Industry Pain Points

Currently, imported EIS equipment remains prohibitively expensive with limited applicability, failing to meet batch testing requirements. Meanwhile, the lack of electrochemical data during mass production makes it difficult to identify internal battery defects in advance. Lyric’s EIS charge-discharge tester takes independent intellectual property rights as the core, filling the technical gap of domestic high-end testing equipment. With its high precision, high reliability and cost advantages, it provides new energy enterprises with solutions that combine technical advancement and economic feasibility, promoting the comprehensive upgrade of battery testing from "experience-based judgment" to "data-driven".

Lyric’s EIS charge-discharge tester is not just a collection of technical parameters, but also a bridge between battery science and engineering practice. Its characteristics of high precision, high efficiency and high adaptability are redefining the industry standards for battery testing. In the process of the new energy industry moving towards high-quality development, this equipment will undoubtedly become the core force to promote technological innovation and ensure product quality.