Blind buried hole circuit board: detailed explanation of power battery safety knowledge
power battery is the safety issue, which is the most difficult and thorny problem of all contradictions. Safety is a very complex system, involving all aspects, energy density, circulation, fast charging, cost, etc. are all complex hybrid systems, which are quite complex links.
Lithium battery is a device for storing energy, which is divided into two parts: one is reversible conversion, and the other is reversible charging and discharging. The second is its own energy consumption, which can release heat in the oxidation reaction. Under normal working conditions, the battery's charge and discharge or energy conversion speed is controllable, but the energy exists in the form of electricity. If short-circuited, the energy release speed is very fast, which will lead to a large amount of heat accumulation. When the speed reaches uncontrollable, explosions and fires will occur. This is the root cause of lithium battery safety accidents.
has a trigger mechanism in which the battery's blind hole board heat is out of control. The trigger mechanism has several stages. First of all, the negative electrode material itself decomposes, and the negative electrode material generates heat, which in turn causes the entire energy release to run out of control, battery explosion and fire. Circuit board factory believes that the first is the choice of raw materials, try to choose a high level of safety, or release less energy materials to make batteries. In addition, from the perspective of battery design, most battery safety accidents are caused by battery defects. Safety is a system engineering, it is not just a material link, from the battery system materials to the entire battery packaging, and then to the battery use link.
From raw materials to battery components, BAK cylindrical batteries have made a comprehensive breakthrough in safety. 28 batteries were randomly selected in the battery package to detonate once. After the battery detonated, the impact of the entire thermal system and the entire vehicle was satisfactorily evaluated.
What factors affect the safety of the power battery blind hole circuit board?
The battery pack needs to ensure that in any battery out of control, the battery pack is still in good condition and can still operate normally. Any single cell loses thermal control and the battery pack still has normal voltage. In the vehicle, any battery will not burn out after a safety accident, and it can continue to run, and the driver needs to be reminded to drive to the 4S store for maintenance.
As for the relationship between battery performance and safety, high energy density is very worthy of attention. HDI board factory believes that high energy density has two directions, one is to choose some new materials, now more high nickel silicon materials, and the other is to provide more materials and more energy in a limited space. Due to the application of high-nickel silicon materials, the thermal energy of new energy vehicles has dropped from the initial 3-valent nickel content to the current 8-valent nickel content.
Blind buried hole circuit board
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