Method and device for testing properties of battery

Abstract

The invention relates to a method and a device for testing properties of a battery. The method comprises the following steps of driving a tester to perform circuit conduction testing on an external testing device of a battery module, and judging whether a circuit of the external testing device is conducted or not; when the circuit of the external testing device is conducted, performing the circuitshort-circuiting testing on the circuit of the external testing device, and judging whether the circuit of the external testing device has short-circuiting or not; when the circuit of the external testing device has short-circuiting, performing OCV / IR (open circuit voltage / internal resistance) testing or function testing on the battery module through the external testing device. The method has the advantages that firstly, the tester is driven to perform circuit conduction testing and circuit short-circuiting testing on the external testing device of the battery module, so as to ensure the normal conduction of the circuit of the external testing device without short-circuiting, and avoid empty testing and false testing when the OCV / IR testing or function testing is performed on the batterymodule, or the fire accident, explosion and other safety accidents of the battery module due to short-circuiting of the external testing device; the safety property of the battery in testing is improved.

Description

technical field [0001] The invention relates to the technical field of battery testing, in particular to a battery performance testing method and device. Background technique [0002] Lithium batteries need to be tested for OCV / IR (OCV: open circuit voltage, IR: AC internal resistance) after the production process is put into use, so as to select products that meet the production conditions according to the performance of the battery. After the lithium battery is assembled, it is necessary to test the function of the lithium battery in order to distinguish the quality of the assembled product. [0003] When performing OCV / IR tests on lithium batteries, it is necessary to contact the probes or briquetting blocks of the external testing device with the positive / negative tabs of the battery cells. The positive / secondary pole contacts of the battery protection board are in contact. However, during the contact process, if the internal circuit of the external test device is disco...

AI Technical Summary

Problems solved by technology

[0003] When performing OCV / IR tests on lithium batteries, it is necessary to contact the probes or briquetting blocks of the external testing device with the positive / negative tabs of the battery cells. The positive / secondary pole contacts of the battery protection board are in contact. However, during the contact process, if the internal circuit of the external test device is disconnected, there will be an empty test phenomenon, and the test will not be accurate. If the internal circuit of the external test device When a short circuit occurs, the lithium battery will be burned, a safety accident will occur, and the equipment and personnel at the production site will be injured.

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