A 18650 lithium battery explosion power is how big? This depends on the capacity of the battery, and how much battery power when the explosion occurs, some people on the Internet based on the energy ratio of lithium batteries to project the 18650 lithium battery if the instantaneous release of energy can produce how much joule of heat and gas, but I think that measurement is not correct, because the 18650 lithium battery explosion is generally due to internal short circuit instant high heat ignited electrolyte induced by violent combustion and fire In the case of 18650 Li-ion battery, there is no violent explosion due to the safety valve.
18650 lithium battery safety valve really solves a lot of lithium battery safety problems, the early 18650 lithium battery safety valve technology is not mature, also led to a lot of safety accidents, with the lithium battery safety valve technology to improve the reliability, but also really improve the safety of lithium batteries, then, 18650 lithium battery safety valve can avoid the explosion?
18650 safety valve is: when the internal pressure of the lithium battery reaches a set value, then the valve tops up, the circuit is broken, so as to avoid the danger. Somewhat similar to the principle of the pressure cooker safety valve. Lithium battery safety valve leakage is mainly due to high internal pressure, and the pressure is often too high because the charging voltage is too high.
What is the 18650 lithium battery safety valve?
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 the explosion of the sealed metal shell, 18650 batteries are now equipped with a safety valve on the top, which is standard for every 18650 battery and is also the most important explosion-proof barrier. When the pressure inside the lithium battery is too high, the top safety valve will open to reduce the pressure to avoid the explosion.
However, when the safety valve is opened, the chemical substances leaking out of the 18650 lithium battery will react with the oxygen in the air under high temperature conditions, and there is still a possibility of fire. In addition, some 18650 lithium batteries now also come with their own protection plate, with overcharge and short circuit protection and other functions, the safety performance is very high.
At present, the major battery manufacturers such as Panasonic, Sony, Samsung and so on production of 18650 battery is actually very safe, and 18650 lithium battery usage is very high, we can do in the daily use of the correct use and avoid the battery short circuit, damage or temperature is too high, do not worry about the battery will explode. We can't knock over a boatload of people with a bamboo pole and qualify the safety of 18650 with individual poor quality products.
Can the safety valve avoid explosion?
Most of 18650 lithium batteries use steel case package, the quality of the battery is not good because there is no protection function, in the case of overcharge (overcharge), it will make its internal pressure increase suddenly, when more than the tolerance value, it will explode. And short circuit, high temperature or the battery is squeezed and deformed or even punctured and other problems may cause the battery to explode.
If the internal pressure of lithium battery increases, then the safety valve will burst to release the internal pressure to ensure that the battery will not explode, generally the positive terminal of cylindrical batteries have a safety valve.
Legitimate, quality 18650 lithium battery safety is very high, you can rest assured that the use of lithium-ion batteries, although manufacturers use some safety measures to ensure the safety of the battery, but when we use it is also to pay special attention to the line, for replaceable battery equipment, try to use the original battery, while charging to maintain ventilation and heat dissipation, especially cell phones, it is best not to put on the bed charging, to avoid heat build-up leads to lithium battery explosion. to avoid the accumulation of heat leading to lithium battery explosion.
Large-capacity power lithium battery safety valve, including a valve body, wherein said valve body includes an upper valve body and a lower valve body, said lower valve body is provided with an exhaust channel, said upper valve body is a cavity structure; said exhaust channel is connected to the cavity of said upper valve body; said upper valve body cavity is provided with an upper top that can be rotatably connected to said upper valve body at the upper end, and a lower top is provided at the lower end of the cavity, said upper top and lower top are connected to each other by elastic element connection.
How powerful is a 18650 lithium battery explosion?
A 18650 battery if the safety valve failure, in the case of fully charged explosion is quite dangerous, because 18650 lithium battery is a cylinder, the negative shell is a one-piece molding, the safety valve and positive embedded in the negative steel shell, when the explosion occurs, the internal air pressure will be the safety valve and the entire positive top out, and generate up to 3000 ℃ high temperature, if close to the human body, instantly can burns human skin, if the positive electrode catharsis out of the explosive material aimed at the human body, will cause great harm to the human body.
Finally, lithium battery explosion is and its dangerous, in daily use to try to use the lithium battery reasonably, and good storage, 18650 lithium battery positive and negative position is very close, generally through the insulating sheet isolation, when the positive position of the outer insulation sheet off, be sure to repair the battery in a timely manner, to avoid short-circuiting lead to lithium battery overheating dangerous explosion accident. Knock on the lithium battery is not desirable, if the lithium battery safety valve failure due to knocking, it is easy to induce the lithium battery explosion and fire. In addition, it is also important to choose the formal production of lithium battery pack manufacturers, reliable battery manufacturers have more stringent requirements and standards for product safety and quality standards, which can more effectively reduce the risk.
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