1. Introduction
Lithium ion battery testing equipment is essential for ensuring the quality, safety, and performance of lithium-ion batteries at the cell, module, and pack levels. This comprehensive guide covers all the key test items, including capacity, internal resistance, cycle life, and consistency.
2. Overview of Lithium Ion Battery Testing Equipment
Lithium ion battery testing equipment is designed to evaluate the performance, safety, and reliability of lithium-ion batteries. These tools are crucial for manufacturers, researchers, and end-users to ensure that batteries meet the required standards and specifications.
2.1 What is Lithium Ion Battery Testing Equipment?
Lithium ion battery testing equipment includes a variety of devices and systems used to measure and analyze the electrical and physical characteristics of lithium-ion batteries. These tools are essential for ensuring the quality and safety of batteries throughout their lifecycle.
Lithium ion battery testing equipment typically includes:
– **Battery Testers**: Devices that measure various parameters such as voltage, current, and temperature.
– **Cycling Test Systems**: Equipment that simulates the charging and discharging cycles of batteries to assess their performance over time.
– **Environmental Chambers**: Chambers that subject batteries to different environmental conditions to test their robustness.
– **Safety Test Equipment**: Tools that evaluate the safety features of batteries, such as thermal runaway and short-circuit protection.
2.2 Importance of Lithium Ion Battery Testing
Lithium ion battery testing is critical for several reasons:
– **Quality Assurance**: Ensures that batteries meet the specified performance and safety standards.
– **Reliability**: Identifies potential issues that could lead to failure or reduced lifespan.
– **Safety**: Prevents hazards such as thermal runaway, fires, and explosions.
– **Performance Optimization**: Helps in improving the design and efficiency of batteries.
Lithium‑Ion Battery Testing Equipment
| Equipment Category | Equipment Name | Core Functions | Typical Application Scenarios | Price Range (USD) | Typical Throughput / Capacity |
|---|---|---|---|---|---|
| Cell‑Level Production Test | Cell OCV & IR Tester | Measure open‑circuit voltage, AC/DC internal resistance; screen cell consistency | Cell incoming inspection, sorting station, mass‑production QC | $1,100‑2,200 | 30‑60 cells per second |
| Cell‑Level Production Test | Cell Formation & Grading Cycler | Charge‑discharge, formation, capacity grading, cycle test, regenerative energy feedbackAlibaba.co… | Lithium‑ion cell manufacturing line, capacity classification | $3,800‑13,500 | 32‑512 independent channels |
| Module & Pack EOL Test | Battery Pack End‑of‑Line Comprehensive Tester | OCV, IR, HIPOT, HVIL, BMS communication, protection function verification | EV / ESS battery pack final production inspection | $14,000‑40,000 | 1‑4 packs / station; 200‑500 packs per shift |
| Module & Pack EOL Test | High‑Voltage Hipot & Insulation Tester | Insulation resistance, AC/DC withstand voltage, high‑voltage leakage detection | Module & pack safety screening, pre‑certification test | $3,300‑9,800 | 700‑1400 test points per hour |
| R&D Validation Test | Pack‑Level Charge‑Discharge Cycler System | Pack charge‑discharge, capacity, pulse load, aging, cycle‑life characterizationMade-in-Ch… | Battery lab performance validation, new product development | $29,000‑98,000 | 1‑8 packs running simultaneously |
| R&D Validation Test | BMS HIL Test System | Simulate cell voltage, temperature, fault injection; validate BMS algorithm & logic | BMS firmware development, pre‑production verification | $33,000‑90,000 | 24‑h automated continuous simulation |
| R&D Validation Test | Temperature & Humidity Environmental Chamber | Temperature cycling, damp‑heat, thermal conditioning for cell/module/pack | Reliability testing, standard certification test | $21,000‑68,000 | 1‑6 samples per chamber; cycle:4‑72 h |
| R&D Validation Test | Vibration & Mechanical Shock Tester | Simulate road vibration, mechanical shock, structural durability test | EV battery mechanical reliability & certification | $40,000‑120,000 | 1‑3 samples per test run |
| Safety Abuse Test | Battery Abuse Test Bench | Overcharge, short‑circuit, crush, thermal runaway triggering test | Third‑party lab, new‑product safety assessment | $50,000‑140,000 | 1 sample per full test cycle |
| Field & After‑Sales Test | Portable Lithium‑ion Pack Diagnostic Analyzer | On‑site voltage/temperature reading, BMS fault code reading, quick health check | After‑sales maintenance, field troubleshooting, spot audit | $2,100‑6,000 | 5‑15 min per pack diagnosis |
3. Test Items for Lithium Ion Cells
Testing lithium-ion cells involves a range of tests to evaluate their individual performance and characteristics. These tests are fundamental for ensuring the quality and reliability of the cells before they are assembled into modules and packs.
3.1 Capacity Testing
Capacity testing measures the amount of charge a cell can hold and deliver. This test is crucial for determining the usable energy storage capacity of the cell.
**How to Perform Capacity Testing:**
– **Charge the Cell**: Fully charge the cell using a constant current (CC) and then a constant voltage (CV) until the current drops to a specified level.
– **Discharge the Cell**: Discharge the cell at a constant current (CC) until the voltage reaches a predetermined cut-off point.
– **Calculate Capacity**: The capacity is calculated by integrating the discharge current over time.
**Example:**
– A 18650 cell is charged to 4.2V and then discharged to 3.0V at a rate of 0.5C. The capacity is measured in milliampere-hours (mAh).
3.2 Internal Resistance Testing
Internal resistance testing measures the opposition to the flow of current within the cell. Low internal resistance is desirable as it indicates better efficiency and lower heat generation during operation.
**How to Perform Internal Resistance Testing:**
– **Apply a Short Pulse Current**: Apply a short, high-current pulse to the cell and measure the resulting voltage drop.
– **Calculate Internal Resistance**: Use Ohm’s Law to calculate the internal resistance from the applied current and the voltage drop.
**Example:**
– A 20A pulse is applied to a cell, and the voltage drop is measured to be 0.05V. The internal resistance is calculated as 0.05V / 20A = 2.5 mΩ.
3.3 Cycle Life Testing
Cycle life testing evaluates the durability and longevity of the cell by subjecting it to repeated charge and discharge cycles. This test helps in determining the number of cycles a cell can endure before its capacity degrades significantly.
**How to Perform Cycle Life Testing:**
– **Set Up the Cycling Parameters**: Define the charge and discharge rates, cut-off voltages, and rest periods.
– **Run the Cycles**: Continuously charge and discharge the cell until the capacity falls below a specified threshold, typically 80% of the initial capacity.
**Example:**
– A cell is cycled at 1C charge and 1C discharge rates, with a 10-minute rest period between cycles. The test continues until the cell capacity drops to 80% of its initial value.
3.4 Consistency Testing
Consistency testing ensures that all cells in a batch have similar performance characteristics. This is important for maintaining the overall performance and reliability of the battery pack.
**How to Perform Consistency Testing:**
– **Measure Key Parameters**: Measure the capacity, internal resistance, and other relevant parameters for each cell in the batch.
– **Analyze the Data**: Compare the data to identify any significant variations. Cells with consistent parameters are grouped together.
| Testing Phase | Step | Operation Details | Key Measured Parameters | Acceptance Objective |
|---|---|---|---|---|
| Pre‑test Preparation | 1 | Select test samples from the same production batch; confirm cells are fully rested after formation‑aging. Calibrate testing instruments, verify probe contact and temperature‑control chamber settings. Bind sample barcode information for full‑data traceability. | Ambient temperature 25 °C ±2 °C, instrument calibration status | Eliminate instrument drift and temperature interference; guarantee repeatable test conditions. |
| Cell‑Level Consistency Test | 2 | Place cells under constant‑temperature environment. Perform OCV and ACIR static measurement for all sampled units. | Open‑circuit voltage (OCV), AC internal resistance (ACIR) | Narrow voltage difference and internal‑resistance deviation; filter out high‑self‑discharge abnormal cells. |
| 3 | Execute standardized charge‑discharge cycle test with identical current‑rate profile for every cell. Record actual capacity, energy and coulomb efficiency. | Discharge capacity, usable energy, coulombic efficiency | Group cells into matching bins; reject units with obvious capacity deviation. | |
| 4 | Conduct static self‑discharge test: store cells for specified hours, retest OCV, calculate voltage drop rate. | Self‑discharge voltage change | Remove cells with excessive self‑discharge before module stacking. | |
| Module‑Level Consistency Test | 5 | Assort screened cells into modules according to bin grouping. Complete welding and assembly. Measure voltage of each cell string inside module; detect insulation resistance and welding contact resistance. | Single‑cell string voltage inside module, contact resistance, insulation value | Confirm no assembly‑caused parameter divergence; detect cold‑welding or loose connection. |
| 6 | Run module charge‑discharge cycling; collect multi‑point temperature data during loading. | Voltage deviation among internal cells, temperature difference | Control intra‑module temperature gradient; find local over‑heating risk. | |
| Battery‑Pack System‑Level Consistency Test | 7 | Integrate qualified modules into finished battery pack. Connect BMS and communication bus. Run full‑pack charge‑discharge cycles under working‑condition simulation. | Real‑time cell voltage spread, temperature spread, BMS sampling error | Verify whether BMS sampling matches actual physical values; expose system‑level inconsistency invisible at cell‑only testing. |
| 8 | Simulate high‑low‑temperature environmental conditions, repeat charge‑discharge profiles. | Parameter deviation under extreme temperature | Confirm consistency performance across full operating temperature range. | |
| Data Evaluation & Judgement | 9 | Export all time‑series test data. Calculate maximum‑minimum deviation, standard deviation for each indicator. Compare results against project‑specific specification thresholds. | Voltage delta, IR delta, capacity deviation, standard deviation | Mark pass / fail; isolate non‑conforming samples. |
| 10 | Archive test reports, link data to MES system. Record batch number, equipment ID and environmental conditions for traceability. | Complete test log, bin classification record | Support batch traceability and root‑cause analysis for abnormal batches. |
**Example:**
– A batch of 100 cells is tested, and the capacity and internal resistance are recorded. Cells with a capacity variation of less than 5% and an internal resistance variation of less than 10% are considered consistent.
4. Test Items for Lithium Ion Modules
Testing lithium-ion modules involves evaluating the performance and reliability of the assembled cells. These tests are crucial for ensuring that the module functions as intended and meets the required specifications.
4.1 Module Capacity Testing
Module capacity testing measures the total energy storage capacity of the module. This test is performed similarly to cell capacity testing but on a larger scale.
**How to Perform Module Capacity Testing:**
– **Charge the Module**: Fully charge the module using a constant current (CC) and then a constant voltage (CV) until the current drops to a specified level.
– **Discharge the Module**: Discharge the module at a constant current (CC) until the voltage reaches a predetermined cut-off point.
– **Calculate Capacity**: The capacity is calculated by integrating the discharge current over time.
**Example:**
– A 10S2P module is charged to 42V and then discharged to 30V at a rate of 0.5C. The capacity is measured in ampere-hours (Ah).
4.2 Module Internal Resistance Testing
Module internal resistance testing measures the total internal resistance of the module, which is the sum of the internal resistances of the individual cells and the interconnects.
**How to Perform Module Internal Resistance Testing:**
– **Apply a Short Pulse Current**: Apply a short, high-current pulse to the module and measure the resulting voltage drop.
– **Calculate Internal Resistance**: Use Ohm’s Law to calculate the internal resistance from the applied current and the voltage drop.
**Example:**
– A 100A pulse is applied to a module, and the voltage drop is measured to be 0.5V. The internal resistance is calculated as 0.5V / 100A = 5 mΩ.
4.3 Module Cycle Life Testing
Module cycle life testing evaluates the durability and longevity of the module by subjecting it to repeated charge and discharge cycles. This test helps in determining the number of cycles a module can endure before its capacity degrades significantly.
**How to Perform Module Cycle Life Testing:**
– **Set Up the Cycling Parameters**: Define the charge and discharge rates, cut-off voltages, and rest periods.
– **Run the Cycles**: Continuously charge and discharge the module until the capacity falls below a specified threshold, typically 80% of the initial capacity.
**Example:**
– A module is cycled at 1C charge and 1C discharge rates, with a 10-minute rest period between cycles. The test continues until the module capacity drops to 80% of its initial value.
4.4 Module Consistency Testing
Module consistency testing ensures that all modules in a batch have similar performance characteristics. This is important for maintaining the overall performance and reliability of the battery pack.
**How to Perform Module Consistency Testing:**
– **Measure Key Parameters**: Measure the capacity, internal resistance, and other relevant parameters for each module in the batch.
– **Analyze the Data**: Compare the data to identify any significant variations. Modules with consistent parameters are grouped together.
**Example:**
– A batch of 50 modules is tested, and the capacity and internal resistance are recorded. Modules with a capacity variation of less than 5% and an internal resistance variation of less than 10% are considered consistent.
5. Test Items for Lithium Ion Packs
Testing lithium-ion packs involves evaluating the performance and reliability of the fully assembled battery system. These tests are crucial for ensuring that the pack functions as intended and meets the required specifications.
5.1 Pack Capacity Testing
Pack capacity testing measures the total energy storage capacity of the pack. This test is performed similarly to cell and module capacity testing but on a larger scale.
**How to Perform Pack Capacity Testing:**
– **Charge the Pack**: Fully charge the pack using a constant current (CC) and then a constant voltage (CV) until the current drops to a specified level.
– **Discharge the Pack**: Discharge the pack at a constant current (CC) until the voltage reaches a predetermined cut-off point.
– **Calculate Capacity**: The capacity is calculated by integrating the discharge current over time.
**Example:**
– A 100kWh battery pack is charged to 400V and then discharged to 300V at a rate of 0.5C. The capacity is measured in kilowatt-hours (kWh).
5.2 Pack Internal Resistance Testing
Pack internal resistance testing measures the total internal resistance of the pack, which is the sum of the internal resistances of the individual cells, modules, and interconnects.
**How to Perform Pack Internal Resistance Testing:**
– **Apply a Short Pulse Current**: Apply a short, high-current pulse to the pack and measure the resulting voltage drop.
– **Calculate Internal Resistance**: Use Ohm’s Law to calculate the internal resistance from the applied current and the voltage drop.
**Example:**
– A 500A pulse is applied to a pack, and the voltage drop is measured to be 2V. The internal resistance is calculated as 2V / 500A = 4 mΩ.
5.3 Pack Cycle Life Testing
Pack cycle life testing evaluates the durability and longevity of the pack by subjecting it to repeated charge and discharge cycles. This test helps in determining the number of cycles a pack can endure before its capacity degrades significantly.
**How to Perform Pack Cycle Life Testing:**
– **Set Up the Cycling Parameters**: Define the charge and discharge rates, cut-off voltages, and rest periods.
– **Run the Cycles**: Continuously charge and discharge the pack until the capacity falls below a specified threshold, typically 80% of the initial capacity.
**Example:**
– A pack is cycled at 1C charge and 1C discharge rates, with a 10-minute rest period between cycles. The test continues until the pack capacity drops to 80% of its initial value.
5.4 Pack Consistency Testing
Pack consistency testing ensures that all packs in a batch have similar performance characteristics. This is important for maintaining the overall performance and reliability of the battery system.
| Test Segment | Operational Steps | Measurement Items | Acceptance Target |
|---|---|---|---|
| Pre‑Test Preparation | Confirm pack mechanical assembly, high‑voltage wiring, BMS and CAN communication are normal. Stabilize test environment at 25 °C ±2 °C. Calibrate pack test system and temperature acquisition channels. Bind pack serial number for MES traceability. Disable active balancing during baseline testing. | Ambient temperature, instrument calibration status, BMS communication status | Remove external interference to ensure authentic test data, avoid balancing algorithm masking real hardware inconsistency. |
| Static Pack Consistency Test (No‑load) | Power on the battery pack, keep at rest for sufficient relaxation time. Read every cell voltage reported by BMS; compare against external high‑precision tester readings. Measure total pack voltage, insulation resistance. | Cell voltage spread (max‑min), BMS sampling error, total pack voltage, insulation resistance | Control cell voltage spread within specification limits; detect BMS sampling deviation, poor insulation and loose connections. |
| Dynamic Charge Consistency Test | Run standard CC‑CV charging profile at defined rate. Continuously log each cell voltage, multi‑point temperature across the pack housing and cooling channels. | Cell voltage divergence during charging, temperature delta inside pack, temperature rise rate | Identify cells reaching cut‑off voltage prematurely; spot abnormal hot spots caused by high‑resistance connections. |
| Dynamic Discharge Consistency Test | Discharge the pack under constant‑current or simulated driving‑cycle load. Record real‑time cell voltage, temperature distribution and terminal cut‑off status. | Cell voltage drop deviation, maximum temperature difference among cells, actual pack discharge capacity | Find weak cells that drop voltage first under load; assess thermal uniformity under real working load. |
| Cycle‑Aged Consistency Monitoring | Execute multiple charge‑discharge cycles. Track the evolution of cell‑to‑cell deviation over cycling. | Trend of voltage spread and temperature spread after cycles | Detect cells that degrade faster than others; evaluate long‑term consistency stability. |
| Extreme‑Temperature Consistency Validation | Repeat charge‑discharge test under low‑temperature and high‑temperature chamber conditions. | Cell parameter deviation under cold / hot ambient conditions | Verify consistency performance across the full operational temperature range of target applications. |
| Data Analysis & Result Judgement | Compare measured voltage spread, temperature spread, capacity deviation and BMS error against project specification. Generate test report, upload full dataset to MES. | Max‑min delta, standard deviation of cell parameters, pass‑fail verdict | Flag non‑conforming packs for rework; complete data traceability for batch quality audit. |
**How to Perform Pack Consistency Testing:**
– **Measure Key Parameters**: Measure the capacity, internal resistance, and other relevant parameters for each pack in the batch.
– **Analyze the Data**: Compare the data to identify any significant variations. Packs with consistent parameters are grouped together.
**Example:**
– A batch of 20 packs is tested, and the capacity and internal resistance are recorded. Packs with a capacity variation of less than 5% and an internal resistance variation of less than 10% are considered consistent.
6. Advanced Testing Techniques
Advanced testing techniques go beyond the basic tests and provide deeper insights into the performance and behavior of lithium-ion batteries. These techniques are often used in research and development to optimize battery design and performance.
6.1 Electrochemical Impedance Spectroscopy (EIS)
Electrochemical Impedance Spectroscopy (EIS) is a powerful technique for analyzing the internal processes and characteristics of lithium-ion batteries. EIS provides information about the impedance of the battery at different frequencies, which can be used to identify and quantify various phenomena such as charge transfer, diffusion, and polarization.
**How to Perform EIS:**
– **Apply a Small AC Signal**: Apply a small alternating current (AC) signal to the battery at different frequencies.
– **Measure the Response**: Measure the resulting voltage and current responses.
– **Analyze the Data**: Use software to analyze the impedance data and extract meaningful parameters.
**Example:**
– EIS is performed on a 18650 cell, and the impedance spectrum is analyzed to determine the charge transfer resistance and Warburg impedance.
6.2 Thermal Imaging
Thermal imaging is a non-invasive technique used to visualize and analyze the temperature distribution within a battery. This technique is useful for identifying hotspots and areas of high thermal activity, which can indicate potential issues such as internal short circuits or uneven heating.
**How to Perform Thermal Imaging:**
– **Use a Thermal Camera**: Use a thermal camera to capture images of the battery during operation.
– **Analyze the Images**: Analyze the thermal images to identify any hotspots or areas of concern.
**Example:**
– A thermal camera is used to monitor the temperature distribution of a 10S2P module during a high-current discharge test. Hotspots are identified and analyzed to determine the cause.
6.3 X-ray Tomography
X-ray tomography is a non-destructive imaging technique used to visualize the internal structure of lithium-ion batteries. This technique provides detailed 3D images of the battery’s components, such as the electrodes, separator, and electrolyte, allowing for the identification of defects and structural issues.
**How to Perform X-ray Tomography:**
– **Use an X-ray Source**: Use an X-ray source to generate X-rays that pass through the battery.
– **Capture the Images**: Use a detector to capture the X-ray images from multiple angles.
– **Reconstruct the 3D Image**: Use software to reconstruct the 3D image of the battery’s internal structure.
**Example:**
– X-ray tomography is performed on a 100kWh battery pack, and the 3D images are analyzed to identify any structural defects or inconsistencies in the electrode layers.
7. Conclusion
Lithium ion battery testing equipment is essential for ensuring the quality, safety, and performance of lithium-ion batteries at the cell, module, and pack levels. By performing a comprehensive set of tests, including capacity, internal resistance, cycle life, and consistency testing, manufacturers and researchers can ensure that batteries meet the required standards and specifications. Advanced testing techniques such as EIS, thermal imaging, and X-ray tomography provide deeper insights into the internal processes and characteristics of batteries, enabling further optimization and improvement.
8.FAQS（
Lithium Ion Battery Testing Equipment: Complete Test Items for Cells, Modules and Packs
）
| No. | Question & Answer |
|---|---|
| Q1 | Q: What levels of lithium‑ion battery testing do mainstream test equipment cover?
A: Test equipment covers three core levels: single cell, battery module, and complete battery pack, covering performance, safety, reliability and environmental adaptability tests for each tier. |
| Q2 | Q: What are the main electrical performance test items for lithium‑ion cells?
A: Capacity test, charge‑discharge cycle test, DC internal resistance (DCIR) test, open‑circuit voltage test, rate performance test, self‑discharge test, and coulombic efficiency test. |
| Q3 | Q: Which equipment is used for cell charge‑discharge and cycle life testing?
A: Battery formation & grading tester, cell charge‑discharge tester, high‑precision cycler, supporting thermal chamber for temperature‑controlled cycling. |
| Q4 | Q: What safety test items are performed on bare cells?
A: Over‑charge, over‑discharge, short‑circuit, crush, nail penetration, heating, thermal shock, vibration, drop test, and high‑low temperature abuse test. |
| Q5 | Q: What environmental simulation tests apply to individual cells?
A: High‑temperature storage, low‑temperature storage, temperature cycling, humidity‑heat aging, vacuum storage, and altitude simulation test. |
| Q6 | Q: What key test items are added when testing battery modules compared with single cells?
A: Module consistency test, string balance test, inter‑module connection resistance test, insulation resistance test, high‑voltage withstand test, and module‑level cycle aging test. |
| Q7 | Q: Why is insulation resistance test critical for battery modules?
A: It detects insulation failure between high‑voltage circuits and module housing, prevents electric leakage and electric shock risks, and complies with global battery safety standards. |
| Q8 | Q: What mechanical tests are carried out on battery modules?
A: Module vibration test, mechanical shock test, squeeze test, drop test, and fastening reliability test for busbar and bolt connections. |
| Q9 | Q: What thermal‑related tests are required for battery modules?
A: Thermal management performance test, temperature uniformity test under charge‑discharge, thermal runaway propagation test among cells inside module, high‑low temperature cycle test. |
| Q10 | Q: What electrical performance tests are standard for finished battery packs?
A: Pack total capacity test, pack charge‑discharge rate capability, whole‑pack DCIR test, BMS communication verification, SOC accuracy calibration, full‑pack self‑discharge and balance performance test. |
| Q11 | Q: What high‑voltage safety tests must be completed for battery packs?
A: Insulation resistance, dielectric withstand voltage (hipot test), high‑voltage interlock loop (HVIL) test, ground continuity test, and over‑voltage / under‑voltage protection verification. |
| Q12 | Q: What environmental adaptability tests apply to complete battery packs?
A: High‑temperature operation & storage, low‑temperature cold cranking test, temperature humidity cycling, salt spray corrosion test, altitude simulation, and waterproof & dustproof (IP rating) test. |
| Q13 | Q: What abuse tests are performed on battery packs?
A: External short‑circuit test, over‑charge abuse test, thermal runaway propagation test, mechanical crush, collision simulation test, and fire exposure test. |
| Q14 | Q: What BMS‑related test items belong to pack‑level testing?
A: BMS sampling accuracy for voltage, temperature and current; protection logic validation; fault diagnosis test; sleep & wake‑up function; communication protocol compatibility test. |
| Q15 | Q: What equipment categories support multi‑level testing (cell / module / pack)?
A: Comprehensive battery test system, high‑voltage pack cycler, environmental test chamber, abuse test bench, hipot & insulation tester, BMS hardware‑in‑the‑loop test platform. |
| Q16 | Q: What are the key differences between cell‑level and pack‑level cycle testing?
A: Cell‑level focuses on material and single‑core life; pack‑level adds influences of BMS strategy, connection loss, thermal inconsistency, and system‑level balance effect on cycle degradation. |
| Q17 | Q: What end‑of‑line production tests are implemented for cells, modules and packs?
A: OCV & IR sorting for cells; module string‑to‑string voltage consistency; pack comprehensive function test, leakage detection, insulation check, and final performance verification before shipment. |
| Q18 | Q: What standard references govern cell‑module‑pack full‑item testing?
A: IEC 62619, IEC 63056, UN 38.3, GB 38031, UL 2056, covering transportation safety, performance and abuse requirements for different test levels. |
| Q19 | Q: What challenges exist in synchronised testing across cell, module and pack levels?
A: Signal consistency, high‑voltage safety isolation, large‑current measurement accuracy, temperature field control, and data correlation analysis between single‑cell data and whole‑system performance. |
| Q20 | Q: How to select suitable testing equipment for cell‑module‑pack complete‑item laboratory?
A: Match voltage‑current range for each test level; confirm compliance with target certification standards; consider combination of cycler, environmental chamber and abuse test bench; reserve data acquisition channels for multi‑point temperature and voltage monitoring. |
