Battery Pack Body (Pack) Testing
Battery pack body testing is generally conducted during the DV/PV (Design Verification/Production Verification) stage to verify whether the design/production of the battery pack meets the design requirements. This includes temperature testing, mechanical testing, external environment simulation testing, low-voltage electrical testing, electromagnetic compatibility testing, electrical safety testing, battery performance testing, abuse testing, and so on. Because everyone is concerned about battery safety issues, here we mainly introduce the testing methods for battery pack testing:
1) Needle testing
Simulate the scene where the battery is punctured by sharp objects, as foreign objects may cause internal short circuits due to penetration. The test requires no ignition or explosion
2) Salt water immersion
5% salt water immersion test for a long time, and the battery function is normal.
At present, the recommended waterproof and dustproof level for new energy vehicle battery packs is IP67 (i.e., soaking in water at a depth of 1 meter for half an hour without damage, while battery packs from SAIC and NIO are all IP67). The use environment of the car is poor, and no matter how to do waterproof and dust-proof protection, it can not be excessive (one year in rainstorm, the rainstorm caused the garage to accumulate water, and the traditional cars were flooded, while the electric car was intact)3) External fire
590 degrees Celsius fire lasting for 152 0173 3840 seconds. The battery has no explosion, fire, combustion, and no residual flames.
4) Drop
The battery shell is intact and functioning normally when it falls freely on a steel plate at a height of 1m.
5) Vibration test
High frequency vibration simulation test, requiring the battery pack to function normally.
. Colleagues who make battery packs should know that this is also difficult to pass1. Low temperature durability test,
2 High temperature durability test,
3. High temperature and high humidity environment durability test,
The battery pack that performs well will promise battery attenuation within its service life. For example, the NIO ES8 promises a battery capacity attenuation of no more than 20% over 10 years and 300000 kilometers. Battery developers know that achieving this level is very difficult. Daring to publicly promise also indicates that their battery pack durability testing has achieved a very excellent level The above article is a partial list. For more testing needs and details, please consult the online consultant of the free consulting agency: 152 0173 3840 (phone and WeChat), conducting testing on over a hundred inspection websites - issuing authoritative testing reports has legal effect
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China