TechWeb Wen / Xinja, at the recent press conference of Zhiji L6 super smart car, Zhiji compared “Zhiji L6 super performance version” with “Xiaomi SU7 Max” when introducing L6.
Zhiji mistakenly marked the motor parameters of Xiaomi SU7 Max as “pre-IGBT and post-SiC” (actually both before and after SiC).
Liu Tao, co-CEO of Zhiji Automotive Technology Co., Ltd., and Zhiji Automobile officials have issued apologies for this issue.
Two apologies, the first one was issued by Liu Tao, co-CEO of Zhiji Automobile, on Weibo.
Liu Tao, co-CEO of Zhiji Automobile, said: “due to the wrong research results of the product information, there was an information error at the press conference.
Xiaomi SU7 is the same as Zhiji L6, both front and rear motors use SIC silicon carbide module, Xiaomi SU7 is indeed our highly respected competitive teammates! Here, I sincerely apologize to Xiaomi Automobile and all of you.
” Xiaomi did not buy such a statement of apology.
We do not accept informal apologies that are understated by individuals, Xiaomi said.
We once again urge Zhiji to clarify publicly immediately and make a formal apology to the public who has been misled.
It should be noted that Liu Tao, co-CEO of Zhiji Automobile, mistakenly wrote “SiC” as “SIC” in this apology.
But after all, this is a “personal understatement of informal apology”, and some mistakes and clerical errors seem to be understandable.
In the second apology, Zhiji officially issued a formal “letter of apology”.
In the letter of apology, Zhiji said: “in the course of the just-concluded” beyond all yearning “Zhiji L6 super intelligent car, during the power introduction of Xiaomi SU7, which was recently discussed on the same level of flow, due to the omission of the team’s content review, a key parameter was mismarked.
The clarification is as follows: the motor before and after the millet SU7 Max version adopts SIC silicon carbide module, which is consistent with the technology adopted by Zhiji L6.
Are the top technical standards in the industry.
Xiaomi Automobile and its products SU7 are our respected competitive teammates! Due to the omission in the internal audit, which caused a negative impact on Xiaomi car, we deeply apologize and sincerely apologize to all fans and users! ” I believe it is not difficult to find that in this letter of apology with the official seal of the Public Relations Department of Zhiji Automotive Technology Co., Ltd., Zhiji still mistakenly wrote “SiC” as “SIC”.
If there is a clerical error in the personal apology statement issued by joint CEO Liu Tao, it is indeed a bit wrong for such a document with an official seal to be miswritten.
As of press time, the relevant errors have been officially corrected.
Junior high school chemistry mistakes, with the rapid development of technology, the field of science and technology continues to give birth to a large number of professional terms, which undoubtedly brings great challenges for non-professionals when writing relevant articles.
They can be forgiven for their occasional misuse or misunderstanding when they try to use these terms.
However, many friends who have received nine-year compulsory education have found that Zhiji’s mistake in the apology letter is a “junior high school chemistry mistake”.
Taking a question in the special training simulation test of “the Mystery of material composition” in junior high school chemistry in the 2019-2020 academic year as an example, the fifth question of this question is: “it is known that carbon element in silicon carbide shows-4 valence, silicon element shows + 4 valence, and the chemical formula of silicon carbide is _.
” from this, it is not difficult to see that writing the chemical formula of silicon carbide correctly is the basic requirement of junior high school chemistry.
In addition, take a question in the 2023 final examination of Grade 9 Chemistry in Xiushui County, Jiujiang City, Jiangxi Province as an example: Huawei is committed to the research and development of core technology, and its independently developed chip has reached the world’s leading level.
The main material of the chip is high-purity silicon, and its structure is similar to that of diamond.
The following statement about silicon is correct that A.
The element symbol is SI,B.
Belongs to non-metallic elements, C.
Silicon is the most abundant element in the earth’s crust.
Elemental silicon is made up of molecules, in which option An is wrong because the symbol of silicon element is Si.
Since the multiple choice question belongs to “simple question”, we can believe that most junior high school examinees will not mistakenly write “Si” as “SI”.
By the same token, “SiC” (silicon carbide) will not be mistakenly written as “SIC”.
Xiaomi Automotive Product Manager commented: please learn and respect technology.
On Sina Weibo, Xiaomi Automotive Product Manager @ Pan Xiaowen posted: “how to write silicon carbide: SiC, please learn and respect technology.
” She also told netizens, “what we often say IGBT/SiC refers to the power module in the electric drive controller.
” It is a switching circuit composed of one or more groups of power chips in parallel.
There are chips with Si as material IGBT configuration, and chips with SiC as material MOSFET configuration (yes, IGBT is configuration, SiC refers to chip material).
The power module is responsible for converting the direct current of the battery into an AC drive motor, and the importance can be imagined.
SiC MOSFET has almost no switching loss compared to Si IGBT.
Because the manufacturing process of SiC is difficult, the film yield and the rate of good products are low, the price of SiC is still 2 to 5 times higher than that of Si.
This configuration is very expensive and we pull engineers to disassemble the technology every day.
Only when we understand its principle, function, and development trend, can we make a correct choice.
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