What standards were referenced and what testing methods were used in the latest battery safety tests?
This safety test for the Xiaomi YU7 LFP battery is a series of sequential, intensified tests designed for extreme conditions. All tests were completed on the same battery. Individual test conditions referenced the new national battery standards and were further intensified. The state of charge and temperature during the nail penetration test were higher, and an extremely rigorous dual-cell double nail penetration protocol was adopted. Under these conditions, the severity of the test is significantly increased.
Among these, the battery aging tests included: 1,000 full charge and discharge cycles of full ultra-fast charging, 36 hours of random vibration at twice the intensity of the new national standard, mechanical impact up to 3.57 times the impact force of the new national standard, 24 hours of submersion in 1-meter deep water, and high-pressure water washing at 80°C. After the aging tests, all functions of the battery remained normal, demonstrating the durability and reliability of the Xiaomi YU7 LFP battery over ultra-long driving distances.
Subsequently, the aged battery underwent two dual-cell nail penetration tests under high temperature, full charge, and no water cooling circulation. During the process, the battery issued a thermal runaway warning signal as required by the new national standard. After both dual-cell nail penetration tests, the battery showed no thermal propagation, did not catch fire, and did not explode, demonstrating the outstanding thermal safety capabilities of the Xiaomi YU7 LFP battery.
The more rigorous multi-cell nail penetration test can better verify the safety performance of the Xiaomi YU7 LFP battery and cover a wider range of user groups and longer-term driving scenarios. Under multiple rigorous conditions, the aged Xiaomi YU7 LFP battery still passed the multi-cell nail penetration test, which precisely proves its excellent safety capabilities and reliability. It is not only more reliable for long-term use but also provides stronger safety performance in the event of extreme accidents, so please rest assured.