How powerful is the explosion of a 18650 lithium battery?

How powerful is the explosion of a 18650 lithium battery? This depends on the capacity of the battery and the amount of battery power at the time of the explosion. Someone on the Internet calculates how many joules of heat and gas can be generated by the 18650 lithium battery according to the energy ratio of the lithium battery if the energy is released instantly, but the author believes that the measurement method is not Incorrect, because the explosion of the 18650 lithium battery is generally caused by the violent combustion and fire caused by the high heat igniting the electrolyte at the moment of the internal short circuit. There will be no violent explosive reaction due to the safety valve. The 18650 lithium battery safety valve does solve many lithium battery safety problems. The early 18650 lithium battery safety valve technology is not mature, and it has also caused many safety accidents. With the improvement of the reliability of the lithium battery safety valve technology, it is also true. It has improved the safety of lithium batteries. So, can the safety valve of 18650 lithium batteries prevent explosion? The function of the 18650 safety valve is: when the internal pressure of the lithium battery reaches a set value, then the valve is lifted and the circuit is disconnected to avoid danger. It is somewhat similar to the principle of a pressure cooker safety valve. The leakage of the safety valve of the lithium battery is mainly due to the excessive internal pressure, and the excessive pressure is often caused by the excessive charging voltage. What is the 18650 lithium battery safety valve? The 18650 lithium battery preparation process has been very mature, in addition to the performance has been greatly improved, its safety is also very perfect. In order to avoid explosion of the sealed metal casing, 18650 batteries are now equipped with a safety valve on the top. The safety valve is the standard configuration of every 18650 battery and the most important explosion-proof barrier. When the internal pressure of the lithium battery is too high, the safety valve on the top of the lithium battery will open the exhaust and reduce pressure to avoid explosion. However, after the safety valve is opened, the chemical substances leaked from the 18650 lithium battery will react chemically with oxygen in the air under high temperature conditions, and a fire may still occur. In addition, some 18650 lithium batteries now come with their own protection boards, which have functions such as overcharge, overdischarge and short circuit protection, and their safety performance is very high. At present, the 18650 batteries produced by major battery manufacturers such as Panasonic, Sony, Samsung, etc. are actually very safe, and the usage rate of 18650 lithium batteries is very high. We can use them correctly in daily use and avoid battery short-circuits and damage. Or the temperature is too high, there is no need to worry about the battery exploding. We cannot overturn a boatman with one bamboo pole, and use individual inferior products to determine the safety of 18650. Can the safety valve prevent explosion? The vast majority of 18650 lithium batteries are packaged in steel shells. Because the quality of batteries that are not good enough has no protection function, the internal pressure will increase sharply in the case of overcharge (overcharge), and when it exceeds the tolerable value, it will explode. Problems such as short circuit, high temperature or squeezing or even puncture of the battery may cause the battery to explode. If the internal pressure of the lithium battery increases, the safety valve will burst to release the internal pressure to ensure that the battery will not explode. Generally, the positive electrode of the cylindrical battery has a safety valve. The regular and qualified 18650 lithium battery is very safe and can be used with confidence. Although the manufacturer uses some safety measures for the lithium ion battery to ensure the safety of the battery, we must pay special attention to it when using it. For devices with replaceable batteries, try to use the original battery, and at the same time maintain ventilation and heat dissipation when charging, especially mobile phones, it is best not to charge on the bed, so as to avoid heat buildup and cause the lithium battery to explode. The high-capacity power lithium battery safety valve includes a valve body, wherein the valve body includes an upper valve body and a lower valve body, the lower valve body is provided with an exhaust passage, and the upper valve body has a cavity structure; The exhaust passage is in communication with the cavity of the upper valve body; the upper end of the upper valve body cavity is provided with an upper roof that can be rotatably connected with the upper valve body, and a lower roof is provided at the lower end of the cavity. The upper roof and the lower roof are connected by elastic elements; what is the explosive power of a 18650 lithium battery? If the safety valve of a 18650 battery fails, it is quite dangerous to explode when fully charged, because the 18650 lithium battery is a cylinder, the negative shell is integrally formed, and the safety valve and the positive electrode are embedded in the steel shell of the negative electrode. When an explosion occurs, the internal air pressure will push out the safety valve and the positive electrode completely, and generate a high temperature of up to 3000 ℃. If it is close to the human body, it can instantly burn the human skin. If the explosive discharged by the positive electrode is directed at the human body, it will cause damage. The human body causes great harm. Finally, the explosion of lithium batteries is extremely dangerous. In daily use, it is necessary to use lithium batteries reasonably and store them properly. The positive and negative poles of 18650 lithium batteries are very close, and they are generally separated by insulating sheets. When the insulating sheet falls off, the battery must be repaired in time to avoid a dangerous explosion accident caused by the overheating of the lithium battery due to a short circuit. It is not advisable to bump the lithium battery. If the safety valve of the lithium battery fails due to the bump, it is easy to induce the explosion and fire of the lithium battery. In addition, it is also very important to choose a manufacturer that regularly produces lithium battery packs. Reliable battery manufacturers have stricter requirements and standards for product safety and quality standards, which can more effectively reduce risks. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Manufacturers of lithium battery packs