3 Testing Testing design: In the overcharge test, three batteries with different chemical properties (LFP, NMC, and NCA) were used for comparative behavior analysis. The reason for choosing these batteries is that LFP has a mild overcharge reaction, NMC electrode has stronger reactivity as a cathode material, and NCA oxide releases oxygen and causes thermal …

1 Introduction With the advancement of electrical and electronic engineering, modern life heavily relies on devices such as smartphones, tablets, electric bicycles, electric vehicles, power tools, and home energy storage systems. According to the IEC 61140 standard, these devices can be divided into two voltage levels: devices below 60V AC and 120V DC, and devices …

Lithium ion batteries widely used in many fields. However, in low-pressure environments, the safety of lithium-ion batteries will be challenged. The change in air pressure has a significant impact on the safety of batteries. We can analyze this issue through the following steps: 1 Lithium battery Structure and working principle The chemical reaction between the …

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 …