1 Cylindrical lithium-ion battery Lithium ion batteries come in various specifications and external dimensions, so measuring the thermal performance parameters of lithium batteries involves multiple testing methods and equipment. We first chose to conduct research on the thermal performance testing of cylindrical lithium-ion batteries, especially on the radial thermal conductivity testing technology for cylindrical lithium-ion …
In industrial production, drying equipment plays a crucial role by removing moisture from materials to achieve the purpose of preserving, processing, or improving product quality. As an important auxiliary equipment in the drying system, the performance and stability of the chiller directly affect the efficiency and effectiveness of the drying process. So, what are …
In the field of sustainable transportation, thermal management of lithium-ion batteries (LIBs) in electric vehicles is a key research area that is crucial for improving energy system efficiency and ensuring safety. Battery thermal management systems (BTMSs) play a decisive role in maintaining LIBs within the optimal temperature range, helping to optimize battery performance and extend …
During the car is in motion, it will face various harsh weather conditions, inevitably resulting in adverse phenomena such as aging and corrosion of component materials, which will affect the appearance and function of the car, and even pose safety hazards. Therefore, analyzing the factors affecting the aging and corrosion of automotive component materials is …
In the second step, the Li ions on the surface area of the electrode are gradually consumed. The transport speed of Li ions in the electrolyte is slower than the electrochemical reaction rate, and the Li ions on the electrode surface cannot be replenished in a timely manner. Macroscopically, this is manifested as a decrease …
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 …