Solutions for Short Circuit and Low Conductivity Testing of Lithium-Ion Batteries

Industry Background

The reliable and safe operation of lithium-ion batteries is a key concern in the industry. Various protective measures can enhance the 

safety performance of batteries from different perspectives. Among them, the detection and evaluation of the effectiveness of safety 

protection measures are particularly important. 

Industry pain points

The square aluminum shell lithium-ion battery adopts a non-insulated weak-conductivity design process between the positive and 

negative electrode shells. This design can specifically enhance the electrochemical anti-corrosion characteristics of the lithium-ion 

battery. This design process will cause the resistance characteristics between the positive and negative electrodes, the positive 

electrode shell, and the negative electrode shell of the battery cell during the short-circuit test stage to be different from those of 

the conventional double-insulation design battery cells, presenting different resistance characteristics. Currently, there is no 

standardization or integrated equipment in the industry that can achieve the detection of weak-conductivity parameters and 

short-circuit parameters. 

Solution

The RJ6903RL series of weak current and short circuit testing products developed by Ruijie Intelligent Technology can simultaneously 

conduct short circuit detection between the positive and negative electrodes of the battery cell and the negative electrode housing, 

while also evaluating the effectiveness of the weak current parameters between the positive electrode housings.

The tester can identify the resistive state when the weak current exceeds the upper limit, and simultaneously detect the transition 

from resistive to capacitive state of the negative electrode housing when the weak current exceeds the upper limit and fails; it can 

also identify the resistive state when the weak current is below the lower limit, and simultaneously detect the characteristic change 

from resistive to capacitive state of the negative electrode housing when the weak current below the lower limit fails.

During the testing process, the status parameters of the weak current signal testing source are displayed in real time, and the test 

results are presented to the user in a full-waveform visual format.