Secondary battery testing system

Abstract

A secondary battery testing system comprises a single chip control module, a testing state control module, a data collecting module, a reference voltage module, a charging-discharging module, an inner resistance testing module and an environment temperature testing module. An outputting end of the single chip control module is connected to an inputting end of the testing state control module; the single chip control module is connected to the data collecting module in bidirectional way via data lines and connected to the environment temperature testing module in bidirectional way; outputting ends of the reference voltage module are respectively connected to the inputting end of the testing state control module and the inputting end of the data collecting module; the outputting ends of the testing state control module are respectively connected to the inputting end of the charging-discharging module and the inputting end of the inner resistance testing module; the outputting end of the charging-discharging module and the outputting end of the inner resistance testing module are respectively connected with the inputting end of the data collecting module. The invention can significantly enhance the detctjion accuracy and precision of the battery; the work is stable and reliable with inner resistance testing function, monitoring the inner resistance change of the secondary battery in the discharging process and providing the inner resistance parameter for the selection and match of the secondary battery.

Description

technical field [0001] The invention relates to a secondary battery testing system, in particular to a testing system suitable for secondary batteries such as lithium-ion batteries, nickel-hydrogen batteries, and nickel-cadmium batteries. Background technique [0002] Secondary batteries, such as lithium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, and especially lithium-ion batteries, are widely used in various fields. However, due to technical problems and production process limitations, some substandard products often appear in the production process. The use of inferior batteries, especially the use of lithium-ion batteries, has potential safety hazards, which may cause overheating, fire, or even explosion. Recently, Hewlett-Packard voluntarily recalled 70,000 notebook lithium batteries due to overheating of lithium batteries. [0003] In view of secondary battery safety issues and performance testing needs, secondary battery testers have be...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defect that the test accuracy and precision of the existing battery test system are greatly affected by temperature, and provide an intelligent secondary battery test system with temperature drift calibration function to further improve the accuracy and accuracy of battery test Accuracy

[0006] The further purpose of the present invention is to overcome the defect that the existing battery test system lacks the internal resistance test during the charging and discharging process, and provide an intelligent secondary battery that does not affect the high-precision measurement of the voltage and current during the charging and discharging process. The secondary battery test system provides internal resistance parameters for secondary battery sorting and matching, improves the reliability of matching and sorting, and further meets the multi-parameter requirements of battery material research

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