How many degrees of high temperature discharge does wide temperature lithium battery support?
The wide temperature lithium battery supports continuous discharge at +85 ° C. Wide temperature lithium battery generally refers to the higher temperature lithium ion battery, so if there is an explosion during use, what will it do to the battery? We know that a cell is usually a ternary lithium battery. And now there are many different cells, such as some common ternary lithium batteries with graphite anode, this kind of material for the negative electrode, lithium galvanic battery with lithium cobalt acid material for the positive electrode. So will wide - temperature lithium batteries explode at sustained high temperatures? Here to share with you the relevant view.
1. Wide temperature lithium batteries may explode
Due to the current use of materials, including ternary lithium ion batteries are lithium cobalt acid, lithium iron phosphate and other materials to do the positive electrode. Therefore, the probability of explosion of ternary lithium battery is very small at low temperature. However, most of the wide temperature lithium batteries on the market will use lithium cobalt acid as the cathode. Lithium iron phosphate is a negative electrode based on ternary lithium; Lithium cobaltate is a positive electrode; The ternary lithium ion makes a negative terminal instead of a positive terminal. This results in a change in the structure of its batteries.
Two, the key to safety is safety management
To solve the safety problem of wide temperature lithium battery, the key is to improve the safety. First of all, the battery should be strictly controlled, which is also a guarantee for the performance of the battery. It can effectively avoid the occurrence of internal short circuit or overcharge in the process of operation of the battery. At the same time, the internal temperature of the battery should be prevented from being too high, resulting in the explosion of the battery. In daily use, we should also pay attention to the safe service life of the battery and avoid overheating and overcharging of the battery. Secondly, we should pay attention to the influence of temperature on the battery. The battery temperature is too high for our own life safety will also be a threat. Therefore, if battery products want to be better applied in our daily life, we should also pay attention to the control of battery temperature.
Analysis of risk and hazard of thermal runaway
From the safety point of view, when the battery temperature is too high, the thermal runaway combustion phenomenon may occur in lithium-ion batteries. This is because the lithium ion contained in the lithium ion battery is mainly composed of droplets. The more droplets, the higher the temperature of the lithium ion battery. If the lithium ion migrates excessively and diffuses in the electrolyte, the irreversible migration of the lithium ion will lead to the battery short-circuit and spontaneous combustion. In addition, the battery running at high temperature for a long time is easy to cause the decomposition of battery materials and the decline of activity, which will accelerate the short circuit and lead to the internal fire or explosion of the battery. Therefore, from the safety point of view, when the temperature of lithium ion battery is too high, it must be turned off in time. In addition, if the temperature is too high, it is easy to cause an internal short circuit, resulting in fire and explosion. In addition, from the perspective of power battery safety analysis, if the use of thermal runaway lithium ion battery is not a comprehensive safety inspection, it is very likely to explode.
Four, use safety precautions
In fact, wide temperature lithium battery is relatively safe to use, because it meets the "GB18483-2001 lithium ion battery safety technical specification" lithium ion battery safety requirements, is relatively in line with safety standards. However, as it is a new product, there is no clear national standard and industry standard to guide the development of this technology, so we need to understand the specific situation in combination with the use of it. In the process of use, it is necessary to avoid contact with high temperature, static electricity, over-discharge, discharge and other dangerous factors, otherwise it is easy to lead to cell explosion. Therefore, in daily use, we must pay attention to the safe use and safe storage of wide temperature lithium battery.
The above is about whether the wide temperature lithium battery will explode and the wide temperature lithium battery related content.
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