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E-mail
info@xaunqd.com
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Phone
18092379637
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Address
Building 8, Collaborative Innovation Port, Fengdong New City, Xixian New Area, Xi'an City, Shaanxi Province
Product Categories
Guolian Quality Inspection
Lithium battery testing
NegotiableUpdate on 04/11
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Overview
Lithium battery testing items: collision test, high and low temperature impact, impact test, durability performance, mechanical performance, predicted lifespan testing, salt spray test, vibration test, mechanical performance
Product Details
Service background
1. Purpose of testing
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2. Core testing items
Voltage and CapacityVerify the nominal voltage and capacity (such as 0.2C charge discharge test).
internal resistanceAC impedance method measurement, high internal resistance may indicate aging or defects.
cycle lifeIf the capacity retention rate is ≥ 80% after 500 cycles (according to IEC 62620 standard).
self-discharge rateAfter being fully charged and left to stand for 28 days, the voltage drop should be ≤ 5%.
Overcharge/overdischargeOvercharge to 1.5 times the rated voltage (such as charging a 4.2V battery to 6.3V), over discharge to 0V, and observe whether there is a fire or expansion.
short-circuit testSimulate external short circuits (such as<5m Ω), monitor temperature rise and safety.
thermal abuseHigh temperature test (such as placing in a 130 ° C oven for 1 hour).
Mechanical testingVibration, compression, and needle punching (as required by UN38.3 and GB 31241).
Overcharge/overdischargeOvercharge to 1.5 times the rated voltage (such as charging a 4.2V battery to 6.3V), over discharge to 0V, and observe whether there is a fire or expansion.
short-circuit testSimulate external short circuits (such as<5m Ω), monitor temperature rise and safety.
thermal abuseHigh temperature test (such as placing in a 130 ° C oven for 1 hour).
Mechanical testingVibration, compression, and needle punching (as required by UN38.3 and GB 31241).
Material compositionXRD analysis of electrode crystal structure, ICP-MS detection of metal impurities.
structural inspectionX-ray/CT scanning is used to detect electrode alignment and membrane integrity.
Packaging qualityHelium mass spectrometer leak detector is used to detect the airtightness of soft pack batteries.
Material compositionXRD analysis of electrode crystal structure, ICP-MS detection of metal impurities.
structural inspectionX-ray/CT scanning is used to detect electrode alignment and membrane integrity.
Packaging qualityHelium mass spectrometer leak detector is used to detect the airtightness of soft pack batteries.
Electrochemical equipmentCharge and discharge tester (such as Arbin BT series), electrochemical workstation (Gamry).
imaging technologyMicroscopic CT (such as ZEISS Xradia) is used for three-dimensional structural analysis.
Thermal management testingInfrared thermography monitors temperature distribution.
Security laboratory configurationExplosion proof cabinets, fire extinguishing systems (such as sandboxes, CO2 fire extinguishers).
Electrochemical equipmentCharge and discharge tester (such as Arbin BT series), electrochemical workstation (Gamry).
imaging technologyMicroscopic CT (such as ZEISS Xradia) is used for three-dimensional structural analysis.
Thermal management testingInfrared thermography monitors temperature distribution.
Security laboratory configurationExplosion proof cabinets, fire extinguishing systems (such as sandboxes, CO2 fire extinguishers).
International StandardUN38.3 (Transportation Safety), IEC 62133 (Consumer Batteries), UL 1642 (Cell Safety).
domestic standardGB 38031 (Safety Requirements for Electric Vehicle Batteries).
International StandardUN38.3 (Transportation Safety), IEC 62133 (Consumer Batteries), UL 1642 (Cell Safety).
domestic standardGB 38031 (Safety Requirements for Electric Vehicle Batteries).
Differences in battery typesSoft pack batteries should focus on packaging inspection, while cylindrical batteries should pay attention to welding quality.
environmental factorsThe test needs to be conducted in a constant temperature and humidity chamber with a temperature of 25 ± 2 ° C and a humidity of ≤ 60%.
BMS verificationDetect the effectiveness of BMS's overvoltage/undervoltage protection and balancing functions.
Differences in battery typesSoft pack batteries should focus on packaging inspection, while cylindrical batteries should pay attention to welding quality.
environmental factorsThe test needs to be conducted in a constant temperature and humidity chamber with a temperature of 25 ± 2 ° C and a humidity of ≤ 60%.
BMS verificationDetect the effectiveness of BMS's overvoltage/undervoltage protection and balancing functions.
data analysisUsing statistical software (such as Minitab) to analyze batch consistency, the standard deviation should be less than 3%.
Machine learning applicationsPredicting lifespan (such as fitting through capacity decay curve).
data analysisUsing statistical software (such as Minitab) to analyze batch consistency, the standard deviation should be less than 3%.
Machine learning applicationsPredicting lifespan (such as fitting through capacity decay curve).
preliminary screeningAppearance inspection, voltage/internal resistance measurement.
Non destructive testingX-ray scanning, self discharge rate.
performance testingCapacity and cycle life.
destructive testingSafety testing (short circuit, needle puncture) is placed last.
preliminary screeningAppearance inspection, voltage/internal resistance measurement.
Non destructive testingX-ray scanning, self discharge rate.
performance testingCapacity and cycle life.
destructive testingSafety testing (short circuit, needle puncture) is placed last.
