DCIR Testing Solution

I.Industry Pain Points

DCIR, the Importance of DCIR

DCIR (Direct Current Internal Resistance) is an important parameter in battery technology, reflecting the internal resistance of the battery. 

During the testing process, by applying a direct current and measuring the corresponding voltage drop, the DCIR of the battery can be 

calculated. 

DC internal resistance encompasses all the resistances within a battery, including ohmic resistance, interface impedance, 

charge transfer impedance, 

and diffusion impedance, etc. These resistances are related to factors such as the battery's materials, structure, and manufacturing process. 

The magnitude of the DC internal resistance has a significant impact on the performance and service life of batteries. Generally speaking, 

the smaller the DC internal resistance, the better the charging and discharging performance of the battery, the higher the energy efficiency, 

and the longer the service life of the battery. Therefore, in the research and development and production process of batteries, 

it is very important to control and optimize the DC internal resistance of the battery. 

Evaluating battery performance: DC internal resistance is one of the important parameters reflecting battery performance.

It directly affects aspects such as battery charging and discharging efficiency, output power, and lifespan. By measuring the DCIR of a battery, 

its performance and quality can be evaluated, and necessary adjustments and improvements can be made. 

2. Diagnosing Battery Issues: When a battery malfunctions or shows abnormal behavior, its DC internal resistance (DCIR) often changes. 

For instance, problems such as electrode aging, electrolyte leakage, or separator damage can all lead to variations in the battery's DCIR. 

By measuring the DCIR of the battery, issues can be detected and diagnosed promptly, allowing for necessary repairs or replacements. 

3. Predicting Battery Life: The DC internal resistance of a battery gradually increases with usage time, which typically indicates a decline 

in battery performance and lifespan. By regularly measuring the DCIR of the battery, its service life can be predicted, and timely replacement

or maintenance can be carried out to prevent equipment or system downtime due to battery failure. 

4. Guide battery research and development: For battery research and development and manufacturing enterprises, measuring the DCIR of

batteries is also a very important step. By conducting DCIR tests and comparisons on batteries with different materials, designs, 

and process parameters, the design and manufacturing process of batteries can be optimized, and the performance and stability of 

batteries can be improved. 

II.Solution:

The RJ3501 series of DC internal resistance testers developed by Ruijie Intelligent can quickly test the DC internal resistance (DCIR) of 

power batteries through precise hardware and high-speed software algorithms. The fastest test speed can complete the DCIR test of 

one battery in 1 second, which can better reflect the polarization internal resistance value of power batteries. When paired with the test

fixtures developed by Ruijie Intelligent, it can be effectively applied to the automatic production line of power batteries to achieve 

line-based DCIR testing and upload the test data to the MES system in real time.