Electrical Safety Analyzer ANBTS7503H Enables Faster, More Precise Lithium Battery Safety Testing

The rapid development of the lithium battery industry has led to a surge in demand for lithium battery testing. This demand is not merely a simple increase in quantity, but also places higher and more stringent requirements on the professionalism and authority of lithium battery testers.

Based on technological iterations and upgraded safety regulations in the lithium battery industry, the demand for lithium battery testing has shifted from scale expansion to in-depth technological evolution. Its core characteristics and policy responses can be summarized as follows:

The explosive growth in the lithium battery market and the increasing complexity of applications have led to continuously higher performance requirements for lithium batteries in various application fields, driving exponential growth in testing demand. In response, national standards and regulations for battery testing are constantly being updated, including full coverage of mandatory safety regulations and coordinated upgrades to technical standards and energy efficiency requirements. Testing dimensions have expanded from basic electrical performance to safety limit testing, operating condition simulation, and full life cycle assessment.

Open circuit voltage (OCV) testing is mainly used to measure the open circuit voltage, AC internal resistance, and casing voltage of battery cells, and is a critical step in the battery production process. Accurate measurement of the battery's open-circuit voltage can effectively assess its charge/discharge state, actual capacity, and degree of aging.

The accuracy requirement for lithium battery OCV testing is 7.5/6.5 digits, with a resolution of 1μV. Process specifications require the fluctuation of the last digit to be controlled within 20 digits; however, in actual production, the last digit of the OCV reading often fluctuates by 20 digits or even more, making it difficult to guarantee compliance with customer requirements.

The AC internal resistance of lithium batteries is generally in the mΩ range, and the higher the capacity of the lithium battery, the lower the internal resistance. The required resolution is 0.1μΩ. Due to the electromagnetic environment of the production line, the internal resistance testing error of traditional measuring equipment may be amplified by 2-4 times or even higher during production.

The OCV test bench, which is divided into capacity testing sections, is responsible for testing open-circuit voltage and AC internal resistance. Its main components include an industrial control computer, a 7.5/6.5 digit multimeter, a battery internal resistance tester, and a multi-channel scanning device. The electromagnetic radiation generated by the operation of the above equipment, as well as the noise signals in the grounding loop, will significantly affect the accuracy of the test results.

Ainol Instruments, with years of experience in the power lithium battery testing industry, has developed the ANBTS7503H high-precision battery tester by analyzing the challenges in the testing process. Its high precision, strong anti-interference capabilities, and multi-channel compatibility perfectly meet the testing requirements of lithium battery formation and capacity testing, while significantly improving adaptability and overall efficiency in testing scenarios.

A high-stability reference voltage source, automatic calibration technology, and strong anti-interference capabilities provide DC voltage measurement with a basic accuracy of 20 PPM and a high resolution of 7.5%.

Synchronous phase detection technology effectively eliminates the influence of noise on weak signals. An ultra-low noise preamplifier and a high-precision analog-to-digital converter achieve low-noise performance testing of the signal chain, with an accuracy of ±(0.2% * reading value + 20 digits).

Differential processing of SENSE and SOURCE minimizes eddy current interference and enhances anti-interference capabilities.

The ANBTS7503H high-precision battery tester integrates the functions of a 7.5-digit voltmeter, an AC internal resistance tester, and a multi-channel scanner (optional). It meets the measurement and testing needs for AC internal resistance, open-circuit voltage, and side voltage during lithium battery aging and sorting, battery pack loading, battery pack unloading, and battery pack unloading processes.

Open-circuit voltage measurement accuracy is ±(0.0010% × reading value + 12.5uV) (10V range), with a resolution of 1μV. Internal resistance measurement accuracy is ±(0.2% * reading value + 20 digits), with a resolution of 0.1μΩ.

Battery internal resistance and open-circuit voltage have comparator function switches, allowing for separate setting of upper and lower limits for resistance and voltage, and compensation testing.

It can measure multiple parameters, such as lithium battery open-circuit voltage and AC internal resistance, meeting multiple testing requirements with a single device.

Compact size, rich interfaces, and simple operation make it particularly suitable for automated production lines, system integration, and desktop testing.

The ANBTS7503H high-precision battery tester, with its excellent measurement accuracy, ultra-high resolution, strong anti-interference capability, and wide applicability, has quietly become an indispensable core device in the lithium battery manufacturing and testing process. Whether in the critical stages of cell formation and capacity testing, or in the online screening and offline testing of modules/battery packs, it can accurately capture every minute battery data point with stable and reliable performance. The emergence of the high-precision battery tester ANBTS7503H directly addresses the current industry pain points, such as insufficient testing accuracy and significant environmental interference, and will serve as a benchmark to guide the development direction of battery testing technology.