UL Auto Business Director Wang Haobo: Self --ustrability Dynamic Lithium Battery Design Source

　　Author ：Iflowpower – Portable Power Station Supplier

As the national new energy car subsidies gradually restroom, the entire industry began to enter the comprehensive competition stage, and the power lithium battery is the core component of pure electric vehicles. Its security, reliability, and performance are new energy automotive industries to be solved. Industrial pain point.

Safety is the last bottom line of new energy vehicles development, and is also a headlines such as consumers' interests. In two months, pure electric vehicles frequent self-ignition, so that consumers have a question of new energy car safety. In July 22, Changzhou 2019 Intellectual Automotive Safety Technology International Summit Forum Wang Hao Bo, the development of the Director, received a media interview including Gaiu, and published the corresponding view.

When talking about electric vehicles frequently occurring a self-ignition, Wang Hao Bo said that many self-ignition accidents happened in recent time, not caused during a collision, more occurs during still status or charging. We found in project related experience, some power lithium batteries may not take into account sufficient risk prevention, because battery design will be limited by performance, manufacturing process, and size of size, many engineers in design At the time, you should consider the limit conditions and make the best balance. For example, whether the wire harness is affecting battery safety performance, and whether there is a safety hazard after the wire beam is squeezed during the manufacturing process, these must be solved in the test phase.

Feng Hao added, the electric vehicle frequently spontaneously spontaneously, the first is the design level, the second is at the production level, the third is to use the level, after the problem of lithium ion battery systems, the company should analyze and improve, and subsequently Improvement method, but this is a process. The following is the interview record (content has a deletion): Q: Whether it is TSLA or other Chinese brand electric motor type, there is a spontaneous combustion incident, when the self-ignition accident occurs, UL is a third-party testing agency, how to divide ? If the third party testing qualified product has spontaneous combustion issues, how is UL plays? Zhou Wei Fang: Promote the development of an industry, a reasonable solution to make users feel safer, trust in the market, this is the secondary. After the concern, if there is no way to help the entire industry, the tragedy is meaningless.

Implement a third-party certification system, so many years, it is relatively successful, or the development of industrial development is promoted. However, product certification is a loop, including from sample design, test, third party certification, final setting, next to many links to ensure the final production batch, which is completely consistent with the sample, even so, all products at this stage Unable to guarantee 100% security. A product is from design to production, and eventually, many factors can cause irreparable impact.

However, from the third party certification for many years related experience, the verification process is the process of mutual cooperation between the company. Only cooperation can guarantee the ultimate effect of the product, this is crucial. For example, the power lithium battery, electric vehicle spontaneous represented, we must work hard from design, production, use all aspects to ensure product safety performance.

Q: At this stage, electric vehicles have large domestic production and sales, but exports less. In terms of standard, where is domestic electric vehicle standards and international standard gaps? How to solve this problem? Feng Hao: At present, it is indeed exported to foreign new energy vehicles. This may be related to the regulatory requirements of various countries, and the domestic vehicle market wants to realize electric vehicle exports, often adopting small batch customization and renovation to meet the access and regulatory requirements of the export market, this inevitably leads the company to give up Large-scale export idea.

During the whole process, it is more troublesome, including electric vehicles, including electric vehicles, including electric vehicles, and in the long-term perspective, domestic car companies want to establish new foreign new energy vehicles. Market, first in the development phase, we must understand the regulatory requirements of the target market, improved during development. The automotive industry is very important to the global network, sales network, after-sales service network, especially electric cars.

It contains some components of components, large risk, so now in CATL (300750), in Europe Constructing a battery factory, in short ago, internalization of the entire industrial chain may promote the export of electric vehicles in my country. Q: Is there a standard plan for the "fire" hydrogen fuel power battery car with electric vehicles and hybrid vehicles? Second, where is the problem of lithium battery, what is the hidden danger? Wang Haobo: There is no special standard for hydrogen fuel power cells, and there is no special standard in the stage, but there is a relevant standard for hydrogen fuel storage, and there is also a standard introduction to the hydrogen station. At present, UL has introduced the world's first security audit standard for hydrogen supplement, and has actual operability, and has been used by customers.

European customers have begun to use this standard to detect and export to North America. It is well known that the hydrotional pressure is large, how to carry out safety inspections under high pressure, is the landing standard we have made by years of explosion-proof high-pressure experience. At present, the development of hydrogen fuel power batteries is in a stage of significant reduction in cost, and high cost is the bottleneck of hydrogen energy development.

Many precious metals are in it, while the supporting requirements are extremely high, so its application of producing or dynamic lithium batteries is a complementary relationship. In terms of long-distance business vehicles, the hydrogen fuel power battery is better, short-distance or powered by power lithium batteries. How to improve the battery, disclosed according to the deputy secretary general of Wang Kun, the Quality and Safety Promotion Association of my country Consumer Products, now according to the feedback research, many self-ignition accidents that have occurred in the last period of time, are not caused during collision, more is in still status or charging Occurs.

We found in project related experience, some power lithium batteries may not take into account sufficient risk prevention, because battery design will be limited by performance, manufacturing process, and size of size, many engineers in design At the time, you should consider the limit conditions and make the best balance. For example, whether the wire harness is affecting battery safety performance, and whether there is a safety hazard after the wire beam is squeezed during the manufacturing process, these must be solved in the test phase. In the automotive industry called the VV process, the product to be tested in the whole process is not the most basic security requirement.

Regardless of the parts company or the vehicle manufacturers, it must have hope to make a quality product, the safest product, in this design process, due to the continuous improvement of technology, standards are also newly added. From personnel, materials to the manufacturing process, there must be a set of standards to our country's global frontier, giving engineers a very standard test process, will clear their design ideas. More standards are safety considerations, because security is always the most critical indicator of market acceptance.

Q: UL has announced many of the electric security standards, in the future, what safety standards have been developed? Zhou Weifang: Relevant standards, UL is a drafting institution. At present, 1800 US national standards in the United States are UL drafted. At present, there are many drafting standards in UL planning.

For example, the first is a network security specification and evaluation process standard for unmanned vehicles. This standard is called UL4600. Now the first draft has ended, waiting for the committee to reach a consensus.

Internally, we have technical committees to organize different companies, do not need interest, promote everyone to reach a consensus, standard is not a speech. At the same time, UL now drafting robot standards. At present, nearly 50 companies in my country are members of the UL Technical Expert Board, becoming a UL Standard Commission, a member of the Drafting Committee's technical team, is the standard once amendment, they will know the first time, these have a strong technical background Companies, many ideas can balance the interests of all parties, representing the idea of ​​all parties.

Q: Although the fuel power battery has a lot of sales in my country, but from policy support perspectives, it is in an outbreak of thousands of leaf, UL as a test certification body, how to see my country's new energy automotive technology route? Will it be involved in the field of hydrogen fuel power cells in the future? Zhou Weifang: The so-called route problem is the choice of hydrogen fuel power battery and power lithium battery. In our opinion, these two techniques have no conflict. From practical applications, although the hydrogen fuel power cell also has the name of the battery, it is actually a generator, electric energy, direct drive motor, but excess electricity must have an energy storage device, store it, Release, on the fuel power battery car, still have storage battery.

From now on, the two batteries are actually complementary on the future technology route, and the application scenarios, and the hydrogen fuel power battery is more suitable for long-distance transportation, including the requirements of the surrounding hydrogenation station, the construction requirements of infrastructure. Regarding commutation, three or four hundred kilometers of traffic distance, now pure electric cars can achieve this endless mileage. Wang Haobo: The fastest Japan in the development of hydrogen fuel power battery vehicles, Japan's current stage is the two technical route strategy, this practical case can be supplied to us more thinking.

Q: In addition to the safety problems caused by natural lithium batteries, there is a ridiculous problem is radiation. Is this problem in power lithium battery testing? Wang Yubo: EMI radiation we are studying, this question must be seen throughout the whole vehicle, only watch the battery alone, there is not much significant, energy should be put into the mileage. Now with partners are also discussing about EMI.

Where is the source of radiation? The radiation intensity has an impact on health, this is demonstrated from medical level. Currently, how do EMIs go to test, how to use how to test, can approach the most realistic driving status, this to discuss the formation process. .