1. Product Overview This is an 8-channel independent high-precision battery analysis system designed for cylindrical cells (e.g. 18650) and pouch lithium cells, supporting full charge-discharge profiling, capacity grading, cycle life testing, DC internal resistance measurement and cell formation. A dedicated variant (CT-4008-Z) is available for supercapacitors, Ni-MH and NiCd rechargeable batteries with a minimum discharge voltage of 0 V. All 8 channels operate under fully independent closed-loop constant current & constant voltage control. Channel parallel mode doubles the maximum test current to support high-rate testing. Equipped with dedicated test software, the system fits laboratory research, small-batch cell production verification and battery pack performance evaluation.
2. Core Product Advantages
1. 8 Independent Channels with Parallel Current Expansion** Each channel adopts separate closed-loop CC/CV architecture without mutual interference. Channels can be paralleled to boost the maximum test current from 6 A to 12 A, covering micro-current material testing and high-rate cell characterization.
2. High Precision & Fast Sampling Performance** 16-bit AD/DA conversion delivers voltage and current accuracy & stability of ±0.05% FS, with power stability of ±0.1% FS. Current full-range response time is only 1 ms, and 10 Hz data sampling ensures real-time curve tracking. Four-wire testing eliminates line resistance errors, with built-in DC resistance testing function.
3. Auto-switchable Multi-Range Current Measurement** Two auto-switchable current ranges: 0.0001 A–0.1 A for micro-current electrode material research, and 0.1 A–6 A for standard cell formation and grading. Three voltage sub-ranges further optimize measurement accuracy across different load levels. 4. Comprehensive Test Modes & Complex Cycle Logic Support** Supports CC, CV, CCCV, constant power charging; constant current, constant power, constant resistance discharging; and pulse charge/discharge. It supports up to 3 layers of nested loops, 1–65535 total cycles, and a maximum single step duration of 365 days for long-term aging and durability tests.
5. Multi-layer Hardware & Software Safety Protection
Software safeguards include power-off data retention, offline testing, and customizable thresholds for overvoltage, undervoltage, overcurrent, undercurrent and delay protection. Hardware is pre-installed with anti-reverse connection modules to prevent cell damage from reverse wiring. The operating noise is lower than 85 dB for lab and factory environments
6. Complete Data Storage & Export System** Built-in MySQL database for massive test data storage; TCP/IP Ethernet communication connects to upper computers. Test data and curves can be exported as Excel, TXT or image files. Multi-language software interfaces (Simplified Chinese, Traditional Chinese, English) are provided for global operation. ## 3. Full Technical Specifications Basic Power & Mechanical - Input Power Supply: AC 220V ±10%, 50 Hz - Total Power Consumption: 425 W - Input Impedance: ≥1 MΩ - Resolution: AD 16 bit, DA 16 bit - Number of Independent Channels: 8 - Form Factor: 3U rackmount, Dimension: 482 × 508 × 378 mm - Operating Noise: <85 dB - Communication Interface: Ethernet port, TCP/IP protocol
Voltage Parameters - Max Voltage per Channel: 5 V - Minimum Discharge Cut-off Voltage: 2.5 V - Auto-switchable Voltage Ranges: 0.5 mA–0.1 A / 0.1 A–3 A / 3 A–6 A - Voltage Accuracy & Stability: ±0.05% FS
Current Parameters - Current Range 1: 0.0001 A – 0.1 A - Current Range 2: 0.1 A – 6 A (up to 12 A via channel parallel) - Current Accuracy & Stability: ±0.05% FS
Power & Timing - Single Channel Max Output Power: 30 W - Current Response Speed: 1 ms (0 to full range) - Single Step Duration: Up to 365 × 24 hours; supports h/min/s/ms time format - Data Recording Conditions - Minimum time interval: 100 ms - Minimum voltage record step: 10 mV - Minimum current record step: 12 mA - Sampling Frequency: 10 Hz
Charge Functions - Charge Modes: CCC, CV, CCCV, CPC (Constant Power Charge) - Termination Triggers: Voltage limit, current limit, elapsed time, capacity threshold
Discharge Functions - Discharge Modes: CCD (Constant Current Discharge), CPD (Constant Power Discharge), CRD (Constant Resistance Discharge) - Termination Triggers: Voltage limit, current limit, elapsed time, capacity threshold
Pulse Test Functions - Pulse Charge: CCC; Pulse Discharge: CCD - Minimum Pulse Width: 500 ms - Auto charge-discharge switching per pulse cycle - Termination Triggers: Voltage limit, total test time
Cycle Control Functions - Total Cycle Count: 1 ~ 65535 cycles - Maximum Steps per Single Loop: 254 steps - Nested Loop: Supports up to 3 layers of nested cycle logic
Protection System - Software Protection: Power-off data backup, offline test mode, customizable voltage/current protection thresholds with delay setting - Hardware Protection: Integrated anti-reverse connection protection module - Measurement Wiring: 4-wire testing to remove contact resistance interference 4. Applicable Test Scenarios 1. Academic Research: Electrode material performance characterization, new cell formula validation, long-term cycle aging tests 2. Cell Manufacturing: 18650 cylindrical cell and pouch polymer cell formation, capacity grading, consistency screening 3. Battery R&D: Rate performance testing, DC internal resistance measurement, pulse load simulation, small battery pack verification 4. Extended Test (Special Model): Supercapacitors, Ni-MH and NiCd secondary battery testing ## 5. Supporting Software & Data Output Matched BTS Client test software delivers the following functions: 1. Real-time monitoring of 8-channel status with multi-language UI options 2. Visual programming of complex test workflows including cycles, pulses and rest steps 3. Real-time plotting of voltage, current, capacity and internal resistance curves 4. Local database storage of all test records via Ethernet TCP/IP connection 5. One-click export of test reports (Excel), raw data (TXT) and trend graphs for lab reports and production QC archives
