The car enterprises have declared that the battery "does not afford fire, not exploding" industry insiders: the power lithium battery is not absolutely safe

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

At the moment, more and more companies claim that the battery "does not afford fire, not explosion" technology. From the first time, the Great Wall Motor has been disclosed to the large-scale battery related technology, it is important to guide the internal heat after the heat loss of the battery, to ensure that the battery does not afford fire and not exploding. Prior to this, there is already included Guangzhou Automobile, 图, BYD, and the talectin and other car companies, and the Ningde Times, Xinwangda and other battery suppliers have successively launched the "no fire" or "non-explosive" power lithium-ion battery solution.

At the same time as the power lithium-ion battery products of the car, there are even more powerful and lithium-ion batteries, and some even played the slogan of "never-fire, never exploded". The standards such as "Electric Vehicle Power Battery Safety Requirements" on May last year require that the battery system does not affont fire within 5 minutes, leaving an escape time within 5 minutes. On the basis of the above provisions, the car enterprise claims that the power lithium-ion battery "never fire, never explod", is it in pursuing a higher power lithium-ion battery safety, or is it in a blind, play? "Do not afford fire, do not explode" power lithium ion battery to enter the company's standard, the lithium ion battery represented by the three-dimensional lithium-ion battery and the lithium iron phosphate ion battery is an important technical direction of my country's new energy vehicle power lithium-ion battery.

However, regardless of the lithium phosphate ion battery, or the three-dimensional lithium-ion battery has varying degrees of anglery. According to data, the new energy vehicle of the three-yuan battery and lithium iron phosphate ion battery is 0.24 and a variety of 0.

09, respectively. In this context, crack the safety of the power lithium-ion battery and become the direction of the company's concentration overcome. Especially since the Ningde Times and BYD caused a "acupuncture test", the power lithium-ion battery "does not affection, not exploding" has become a new product standard after the car.

For example, BYD's "Blade Battery", Guangqi Yami's magazine battery, Ningde Times 811 battery, 图 free amber and mica battery system technology and Great Wall Auto Dagu battery and honeycomb jelly battery, etc. Compared with the process of isolating and cooling in the previous dynamic lithium-ion battery, most of the power lithium-ion batteries of the main "do not afford, not exploding" have been improved in a scattered / insulation link. According to Cao Yongqiang, Director of Great Wall Auto Electric Battery Design, Daxie battery technology adopts heat sources, two-way shunt, heat flow distribution, cover heat source suppression, isolation, cooling, etc.

, which can effectively solve the thermal out of control of different chemical architectural cells. Fire, explosion problem. Similarly, the technical principle of the three-dimensional heat-insulating wall of the 图 汽车 is also a three-dimensional three-dimensional parcel in all cells in the battery, so that the three-dimensional insulation wall forms an efficient heat insulating flame retardant between the cell and the cell.

Insulation protective layer. "Previously, we test the power lithium-ion battery and the way to take protective and blocking, but in the test to the large-capacity ternary battery, especially the 811 architecture, its single electricity. The core storage is very large.

If the blocking method is used, when the heat reaches a certain degree, it is easy to cause the adjacent electrical cell and adjacent modules. "Cao Yongqiang said. Car Enterprise Exploring New Battery Test Verification Method Although car enterprises continue to launch the powerful lithium-ion battery "Do not afford fire, not exploding", the mainstream view of the industry is still in any battery, can not do 100% security.

"From the perspective of technical research and development, most 'does not afford fire, non-explosive" battery technology is still improved research and development. "A car pneumatic lithium-ion battery R & D person told the" Daily Economic News "reporter, the basic attribute of battery raw materials determines the battery of the battery, the electrolysis, electrolyte, etc. in the battery.

Lithium, nickel and other active elements, such elements can not prevent explosion after contacting the air. Some industry insiders said that the power lithium-ion battery has no absolute security, the company will focus on "not fire, do not explode", and how many ingredients are. Not only that, there is still some power lithium-ion battery that "does not afford fire, not exploding", and tests it in important conjunction.

Huang Min, Director of New Energy Technology, Fuchai, said: "From the perspective of the statistical results of the past long trial, the volatility of acupuncture test is large, and the repeatability is not very good. A repetitive result, we are not very sure, this is the embodiment of safety. "It is understood that the safety requirements and test methods of electric vehicles were deleted from the" Power Battery Safety Requirements "of the electric vehicle began in January 1 this year.

The reporter noted that there is already a company to turn to other methods to test the battery safety performance. For example, the large-handed battery is selected from the NCM811 battery with the worst safety and stability to heat the test, which triggers a plurality of cells in a large-capacity high nickel cell, any position in the battery pack, simulates the danger limit scene in thermal out-of control; After the electric car is involved, the test vehicle continues to collision, and after further verification, the battery pack is safe after further verification. In the above-mentioned a vehicle enterprise-described lithium-ion battery R & D perspectant: "Battery safety is a systematic problem, both involving material research, also involving application problems, structural optimization, vehicle strategy optimization.

Battery companies want to solve security problems, to accumulate the integration of whole-industrial chain through materials R & D and equipment. ".

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