External short circuit generally refers to a short circuit caused by direct contact between the positive and negative electrodes of a battery. External short circuit (ESC) can cause temperature rise, and if it lasts long enough, it may damage the battery. 1 Test 18650 NCM battery was used in the test In the first test, …
1 Overview of Low Temperature Test Low temperature testing is used to determine the usage, transportation, or storage capacity of components, equipment, or other products under low-temperature environmental conditions. With the continuous development of science and technology, the requirements for products are constantly increasing, and the quality and reliability indicators of electronic products working at …
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2.2 Different needle punching speeds The loading speeds are set to 1 mm/min, 5 mm/min, 10 mm/min, and 20 mm/min. It can be seen that the ultimate load increases with the increase of speed, and the maximum average ultimate load is 1.56 kN (20 mm/min). When the loading speed of the sample increases from …
The compression of power batteries by sharp objects is the main form of damage caused by car collisions, and it is also a very severe working condition. In severe cases, lithium-ion batteries can explode, causing damage to electric vehicles and even personal injury. In order to reveal the safety performance of lithium-ion batteries under …
With the rapid expansion of the electric vehicle market, problems related to electric vehicles are becoming increasingly prominent, and one of the most serious problems is the long charging time, so the demand for fast charging is becoming increasingly urgent. In addition, to meet the needs of some cold regions, the low-temperature performance of batteries …
Salt spray test is an environmental test that mainly uses the artificial simulated salt spray environmental conditions created by salt spray testing equipment to assess the corrosion resistance of products or metal materials. Compared with the natural environment, the salt concentration of chloride in its salt spray environment can be several times or tens of …
The constant temperature and humidity test chamber is a highly precise testing equipment that can perform constant humidity and temperature performance testing on products under simulated natural environmental conditions to evaluate their performance, stability, and durability. 1 Composition of the system The equipment consists of five major systems, including control system, refrigeration system, heating …
Walk-in environmental chamber is a device used to test and determine the performance of electrical, electronic, and other products and materials in high, low, or constant temperature environments. This type of device is widely used in fields such as aviation, automobiles, home appliances, and scientific research, and can simulate various extreme environmental conditions to evaluate …
Due to limitations in materials, battery technology, and manufacturing processes, lithium-ion batteries have always faced significant fire risks during use. The safety of lithium-ion batteries under collision and compression has always been a focus of attention. In general, fires caused by external forces in lithium-ion batteries are fundamentally caused by internal short circuits due …