Forums > General Discussion > How can we improve the safety of lithium batteries and reduce the probability of explosion of lithium batteries?
| How can we improve the safety of lithium batteries and reduce the probability of explosion of lithium batteries? | |
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| Posted: 14 Jun 2022 03:10 UTC | Post #1 |
| winshinepower Deck & Engine |
Registered Total Posts: 8 |
| Strict quality inspection is one aspect： According to the standard "Safety Requirements and Test Methods for Power Batteries for Electric Vehicles", a variety of abuse behaviors that may occur during battery use are simulated and assessed. However , these are only the market access conditions for lithium batteries. Due to the different mechanical designs and testing processes of enterprises, there are errors in specific evaluations. Even if the specified tests are passed, it does not mean that lithium batteries are necessarily safe. Conventiona l quality inspection items include mechanical performance test, including vibration test, mechanical shock, simulated collision; environmental adaptation test, including high and low temperature shock, temperature and humidity cycle; electrical performance test, including charge and discharge capacity, cycle life test, etc. Among them, lithium battery defect detection is an important part of the production end. In the past, the traditional method was mainly based on manual sampling measurement, and the shortcomings were very obvious: high labor costs, operations are easily affected by subjective will, and visual fatigue, and the results are very low. In October 2020, the Society of Automotive Engineers released the "Technical Roadmap 2.0 for Energy-Saving and New Energy Vehicles", requiring research on new analysis and testing and evaluation technologies in power lithium batteries to achieve standardization, efficiency, accuracy and quantification. By 2025 , 2030, and 2035, the fire accident rate of new energy vehicles should be less than 0.5 times/10,000 vehicles, 0.1 times/10,000 vehicles and 0.01 times/10,000 vehicles, respectively. At the same time, with the expansion of orders from domestic lithium battery manufacturers, especially overseas customers have more special requirements, and the quality control is also stricter than in China, car companies such as BMW and Tesla will require all lithium batteries to be tested one by one. Policies and markets are forcing detection technology to be intelligentized to improve accuracy and efficiency. Typically, CATL cooperates with Baidu Feiyu to integrate AI artificial intelligence and machine vision into the quality inspection line, replacing artificial eye diagnosis with electronic diagnosis. Accord ing to the law of industry development, once the leading battery factory starts according to the strictest customer requirements, all the quality inspection standards in the future may move closer to the strictest and form a general rule. X-ray non-destructive testing of lithium batteries Based on the trend of major factory production line upgrades and full inspections instead of random inspections, inspection equipment and its upstream core component companies have captured the opportunity of this segmented scenario. Accordi ng to the founder of Shansiwei Technology, a company that makes high-performance X-ray detectors, this technology belongs to non-destructive testing. On the premise of not destroying the measured object, X-ray perspective can be used to see the internal high-resolution structure, and Check the parameters. Its medical application is the most familiar, such as taking a CT, chest X-ray, or dental X-ray, as well as subway luggage and security checks. It stands to reason that this is a very mature technology, but it is still a new thing to use it in the detection of lithium batteries for new energy vehicles, and it is also a new growth point in the field of global industrial non-destructive testing. X-ray non-destructive testing can identify the early defects of lithium batteries, screen out small problems such as whether the distance between the positive and negative electrodes of lithium batteries is safe, whether the position is offset, etc., so that the probability of spontaneous combustion and explosion is reduced from one in ten thousand to one million or even one thousand One in ten thousand. But this is not easy. It requires the resolution of the equipment to reach the micron or even nanometer level, which can only be achieved by high-resolution detectors combined with high-magnification X-ray imaging systems. Since the core components of this type of testing equipment were all imported, the price was high and the technology was monopolized, so domestic enterprises were eyeing the market gap of import substitution. According to brokerage estimates, the annualized market space for detectors in the field of lithium batteries is about 380 million yuan in the next five years. The advanced X-ray adds a safety barrier to the new energy vehicle, which is not only a spark from the collision of technological innovation and traditional craftsmanship, but also a manifestation of the activation of the sunrise industry. For more information, please follow the link below: https://www.winshi nepower.com/ | |
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