Neware CT-4008Q 5V100mA Battery Testing System, ENCT4008Q5V100mA

The Neware CT-4008Q is a high-precision battery testing system specifically designed for R&D labs and quality control, particularly for small-format cells like the pouch cells, coin cells, and 18650s you are working with. The "Q" in the model name stands for Quintuple (5) ranges, meaning each channel can automatically switch between five different current scales to maintain extreme accuracy from micro-amps up to the full rated current.

The CT-4008Q series is the "low-current" high-precision branch of Neware's 4000 series. (1) Voltage Range: Typically 0V to 5V (standard for Lithium chemistries). (2) Current Ranges: Most common configurations are 5V 10mA, 100mA, 1A, 6A, or 12A. (3) Accuracy: 0.05% of Full Scale (FS). Because of the multi-range switching, it remains accurate even when testing at very low C-rates. (4) Data Acquisition: Sampling rates up to 10Hz (100ms per point), which is essential for capturing the voltage plateaus during SEI formation or Pulse tests.

It can be mainly used for: (1) DCIR Testing (Direct Current Internal Resistance): The software can automatically calculate the internal resistance of your pouch cells, which is a primary indicator of how well your tabs were welded and how well your electrolyte has wetted the electrodes. (2) Cycle Life Testing: You can program thousands of "Charge-Rest-Discharge-Rest" loops to see how your battery degrades over months of use. (3) C-Rate Characterization: Easily test how your pouch cell performs under high power (fast discharge) versus high energy (slow discharge). (4) d(Q)/d(V) Analysis: The high precision of the 4008Q allows you to perform Differential Capacity Analysis. This helps you identify specific electrochemical reactions and phase transitions occurring inside your cell that aren't visible on a standard voltage curve.

References:

S. Chen, et al., Critical Parameters for Evaluating Coin Cells and Pouch Cells of Rechargeable Li-Metal Batteries, Joule, 2019, 3, 1094-1105

Y. Son, et al., Analysis of Differences in Electrochemical Performance Between Coin and Pouch Cells for Lithium-Ion Battery Applications, Energy Environmental Materials, 2024, 7, e12615.