Solution for Short-Circuit Testing of Power Batteries

Industry Background:

The large-scale manufacturing of power batteries has been initiated, and safety issues have become a Damocles' sword hanging over 

the industry, urgently awaiting resolution.

Battery safety can generally be categorized into three levels: inherent safety of the battery cell, safety protection at different levels, 

and (relatively) acceptable safety as stipulated by regulations and standards. Currently, the inherent safety of the battery cell remains 

the top priority to be addressed in battery safety.

An important method to measure the inherent safety of a battery cell is to force an internal short circuit and test whether it catches fire 

or explodes, as well as the cell's voltage drop and temperature rise. 

The significance of the forced internal short circuit test for battery cells:

There are numerous factors that can cause internal short circuits in battery cells, including the characteristics of the separator, 

development and design, manufacturing processes, packaging and transportation, assembly and application, usage, maintenance 

and reuse, etc. All these scenarios may lead to indirect or direct internal short circuits in battery cells. The forced internal short circuit 

test for battery cells is to verify whether an internal short circuit occurs in the battery cell and whether it will catch fire or explode 

when an internal short circuit occurs, thereby identifying the inherent safety characteristics of the battery cell and the safety 

characteristics of the battery system. 

Industry pain points:

With the development of new energy technology, lithium batteries with high energy density and environmentally friendly production, 

usage and recycling processes are increasingly favored by people. Benefiting from national development policies and the rapid expansion 

of the new energy vehicle market, the development space for lithium batteries is vast. Currently, the stability of capacitive cell 

testing is poor, the cost is high, and it is difficult to meet the requirements of automated data collection and remote control, 

as well as the requirements of various on-site applications. At present, the higher the degree of automation, the more complex the 

control system of the equipment becomes, and the demand is large. In the continuous cell measurement on the assembly line, 

poor contact is encountered, resulting in abnormal test results, and it takes a long time to handle abnormal situations, 

which affects the work progress. 

Solution:

The RJ6901C lithium battery cell short-circuit tester independently developed by Ruijie Intelligent is a short-circuit tester specifically 

designed for capacitive loads such as battery cells. During the testing process, the instrument collects the leakage current in the 

output circuit. Based on the collected leakage current and the set voltage value, the insulation resistance of the output circuit is obtained. 

At the same time, the instrument compares the calculated insulation resistance with the upper and lower limits of the set resistance value.