Cell Testing

Module & Pack Testing

Battery Cell Formation

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Key Features High accuracy ± 0.015% of F.S. High precision ± 0.005% of F.S. Multiple current range 300 A / 150 A / 30 A Fast current response <1.5 mS Charge and discharge with zero crossover time 200% pulse current Channel parallel output up to 4800 A Efficient recycling of discharged energy (75%) High speed data logging (10 mS) High single point transient sampling rate (1 mS) Level 2 V. Protection Integrable data logger and chamber Compliant with IEC and GB/T standards

Chroma 17010H Battery Reliability Test System is a high-precision charge and discharge test equipment specifically designed for high current/high power performance testing. This system is suitable for performance evaluation, life cycle testing, and product selection of large Lithium-ion Battery Cells (LIB Cells), Electric Double Layer Capacitors (EDLCs), and Lithium-ion Capacitors (LICs).

The 17010H's energy recovery circuit architecture offers a marked improvement over traditional switching power supply equipment. It features high measurement accuracy/precision, high-speed current response, zero-crossover time for charge-discharge conversion, as well as multiple current ranges, which help battery cell experiments to enhance capacity test accuracy, improve performance parameter identification, and facilitate realistic dynamic current and power testing. In addition, Chroma 17010H has a 200% pulse current output function, a 300A single-channel continuous current, and provides a 30S pulse test current of 600A, which is beneficial to applications such as power capability and DC internal resistance testing which require short-term and high-rate test currents, while also reducing equipment purchase costs.

High-current life cycle tests highlight the importance of testing the equipment's energy conversion efficiency. Benefits include not only reduced power demand but also a large decrease in heat production. The control circuit operates at a relatively low temperature, effectively suppressing thermal drift and extending components' life cycles. In this way, the 17010H achieves accurate and stable test performance. Compared with linear circuit products, it offers more efficient energy conversion and higher power density, reduces power distribution requirements for laboratories, saves operating power and air conditioning costs, and improves space utilization.

Taking into account the diversity of battery cell products and experiments, Chroma 17010H features a channel parallel function with a continuous current up to 2400A and a pulse current up to 4800A, greatly improving the applicability of the system.

With regards to safety, each channel is additionally equipped with Level 2 V. Protection, and an independent measurement loop prevents battery overvoltage when a single component fails, enhancing testing safety. In addition, the system's product maintenance design has been improved: the circuit units are modularized and can be individually assembled and disassembled quickly, enabling convenient maintenance and channel backup.

Accurate output capability that meets test standards

Run power capability tests and driving simulations to test compliance of vehicle batteries with international standards. Test parameters for high-rate current and power are based on battery operating conditions (such as BEV, PHEV and HEV) with an output time of 30S, which makes purchasing full-power equipment unnecessary. Chroma 17010H not only provides 200% rated pulse current and power output capability, but can also effectively save equipment costs and space.

Chroma 17010H feeds the electric energy released during discharge back to the AC power grid, which greatly reduces the generation of waste heat, realizes green energy manufacturing with low carbon emissions, reduces power distribution requirements, and saves operating power and air conditioning costs.

• Discharged energy is fed back to the regional power grid with a recovery rate of 75%
• System feedback grid current's total harmonic distortion <5%

Fast current response < 1.5 mS / 200% pulse current output < 2 mS

The fast current response provides ideal experimental conditions, reduces occurrence of cumulative errors during the fast-changing dynamic test and obtains low-distortion data.

▴ Switching time (+90% to -90%): <1.5mS @270A ~-270A Load: 5meter cable short circuit	▴ Rise time (-20% to -180%): <2mS @-120A ~-540A Load: 5meter cable short circuit

▴ Precise measurement of voltage and current

Accuracy is key to comparison of different channel data

Battery products often require multi-channel experiments for comparative analysis to ensure the accuracy of measured differences between different channels. The higher the accuracy, the easier it is to identify differences.

High precision improves data analysis efficiency

The inside of the battery is a complex electrochemical structure, and its characteristics are changed by the current, temperature, SOC, SOH and other experimental conditions. Initial changes are subtle and easily affected by the measurement stability of the equipment. High precision ensures measurement reproducibility and reduces measurement-caused data jumps, which is very helpful for the interpretation of the testing data.

(Capable for 17010H-6-300Z/17010H-6-300U)

• Can perform battery cell 0V abuse test
• Suitable for EDLC testing

Automatically select suitable current range in constant current (CC) mode

Provides multiple current output and measurement ranges and is suitable for test plans covering both high current and small current

Automatically switch suitable current ranges in constant voltage (CV) mode

Supports automatic switching of current ranges in constant voltage (CV) test mode with no output interruption during the process, improving current resolution and consistency of the cut-off judgment

▴ DTS application test and corresponding diagram of current range	▴ Constant voltage test current switching schematic

Level 2 V. Protection reduces the risk of voltage measurement failure

Accidents caused by large battery cells are unpredictable. In order to strengthen the safety of the experiment, an auxiliary voltage is independently set in each channel to protect the measurement circuit, which independently memorizes the protection parameters and operates autonomously. When an abnormality occurs, the output circuit is forcibly closed immediately.

Battery Lab Expert (Battery LEx) is the testing software platform specially developed for battery cell testing:

• Group testing: Multiple channels of the same experiment are grouped to simplify operations and execute up to 50,000 steps
• Variable editing: Using the data from the external data logger for flexible programming and complex applications
• Chamber integration: DI/DO amplification monitors the chamber's status and protection mechanisms in real time

Project Browser

Create up to 500 projects and construct corresponding test plans according to different DUT types or requirements. The project browser allows for easy review or adjustment of the DUT specifications, waveform simulation data, and recipe content.

• DUT database: Quickly enter corresponding DUT parameters when editing a recipe, and easily share recipes to different DUTs
• Waveform simulation folder: Import .xlsx data points to the folder, the waveform simulation can set the time interval (fixed/user defined), output magnification, and data range
• Adjust and save parameters in real time while browsing
• Filter keywords to search for test plans
• Transmit test plans in .xlsx format

▴ Waveform Simulation Database	▴ DUT Database	▴ Project Browser

Recipe Editor

In the hierarchical editing structure (test plan → main recipe → sub-recipe), users can directly share existing recipes by replacing the DUT specifications or quickly complete a plan by flexibly combining existing sub-recipes. Easily create new recipes to meet various types of charge and discharge test applications.

• Step types: CC/CV/CP/CC-CV/CP-CV Charge and Discharge, CR Discharge, Current/Power Waveform, Rest, Common Rest, Chamber Control, Super CC/CP Charge and Discharge
• Cut-off conditions:
▸ step cut-off→current, voltage, power, energy, capacity, time
▸ recipe cut-off→current, voltage, power, cumulative energy, cumulative capacity, time
▸ external cut-off parameters→each step contains up to 4 cut-off settings
• Go to: Next, End, Jump, If-then logic jump. Each step can support multiple cut-off conditions and jumps
• Special input methods: C-rate, OCV-SOC, Q%, ±V, Variable
• Four-level Cycles: Single cycle up to 999,999 times, providing single step repeat and cycle time cut-off
• Variable setting and cut-off conditions: 20 sets of variable setting include 2 variable functions for use across sub-recipes. 1mS~100mS transient capture of the variable at the start of the step, or records the test value at the start/end of the step and defines it as a variable for secondary calculation
• Recipe protections: Voltage, Current, Chamber Temperature, Energy, Capacity, Current/Voltage Change, CC-CV/CP-CV Transition Time/Level 2 V. Protection Function

Recipe Executor

▴ Recipe Executor

The recipe executor adopts group management according to different test plans. All channels in the group will simultaneously start testing and display their real-time test status. When integrated with a chamber, each channel will automatically trigger a waiting mechanism, and the temperature control will not start until all the channels reach the same condition. When there are multiple groups in the chamber, they can be set to wait between groups.

• Control modes: Start, Pause, Resume, Stop, Reserved Pause, Skip, Specified Start, Pause to Jump, Preview
• Real-time testing status display
• Dynamic parallel settings
• Multi-group start

▴ Real-time Chart Display

Real-time Chart Display

Display charging and discharging curves in real time while testing. Users can zoom in and out on data and display data values by dragging the mouse, as well as flexibly select any channel and axis item.

• Real-time charting based on the user-defined sampling time of up to 36,000 data points per screen
• Up to 4 sets of real-time display screens, with test comparison for up to 2 channels per screen
• Time freeze function to store test curves
• Dual y-axis data display

Test Report

▴ Test Report Preview

• Auto report: after the sub-recipe finished testing, its data will be automatically exported to the path and file name set by the user
• Export modes: auto export of sub-recipe, manual export of test plan
• The system can adjust effective digits in the data up to 9 decimal places
• Report types: channel report, step report
• Free adjustment of the order of report items and field orders

Chamber Control and System DI/DO Signal Control

▴ Chamber Control Settings

• Triple chamber control: chamber control step, real-time remote control, and maintenance mode
• Delay time: set the rest time after reaching the set temperature to secure similar temperatures between the DUT and chamber
• Double temperature adjustment: the temperature logger adjusts the chamber to ensure that the chamber and DUT's actual temperature are the exact same
• Chamber actions after testing: maintain, end, or adjust the temperature control
• Dual chamber protection control: over-temperature and overtime
• Tri-color warning light signal and relay signal are provided

Management

▴ Test Plan Import/Export