Shulou(Shulou.com)11/24 Report--

August 24 news, the world-renowned research institute SNE research recently released the global power battery loading data report from January to June 2023.

Overall, the global load of power batteries was 304.3GWH from January to June 2023, up 50.1 percent from a year earlier, down from a high growth rate of 71.8 percent for the whole of 2022, according to the report. Among them, the global power battery leader Ningde era installed 112GWH, a sharp increase of 56.2% over the same period last year, and the global market share reached 36.8%, becoming the only manufacturer with a market share of more than 30% among global power battery suppliers, and has ranked first in the world for six consecutive years.

Behind this bright report card, the innovative spirit of courageously breaking into the "no man's land" and solid and steady R & D investment have always been the "magic weapon" of the Ningde era.

Build a "reliable" explosion-proof valve

Real innovators are all looking up at the stars and keeping their feet on the ground, which are indispensable. Even behind a small explosion-proof valve, there have been countless explorations and efforts.

The process of charge and discharge of lithium battery is essentially a vivid chemical reaction. In this invisible nanometer world, not all material reactions are beneficial to the battery. For example, gas emissions have brought long-term troubles to engineers.

However, in extreme cases caused by external causes, disordered chemical reactions may produce a large amount of gas in an instant. If the gas cannot be discharged from the outside of the battery in time, the accumulating pressure will cause the battery to deform, and if it is serious, it may explode, thus threatening the life and safety of car users.

"explosion-proof valve is not only a protective device in case of dangerous accident, but also an umbrella for safe charge and discharge of battery. therefore, we need to create a 'reliable' explosion-proof valve." In the Ningde era, Zheng Yulian engineer said.

Although the explosion valve is small, it is not easy to be very reliable. Engineers are well aware of the challenges, so in the key position of the battery, the explosion-proof disc is designed for it. When the pressure is too high, the explosion-proof disc will be broken by the pressure and the gas can be discharged.

But what bothers engineers is that the orderly chemical reaction inside the battery will also produce gas. although the explosion-proof disc can maximize the safety of the user, if the air pressure is lower than the design value, the explosion-proof disc will burst in advance, which will shorten the service life of the battery and cause battery waste.

After a large number of tests, Ningde era found that one of the reasons why the explosion-proof piece is easy to burst in advance is that the battery top cover is provided with an exhaust hole, which makes the battery top cover easy to deform and can not meet the requirements of the flatness of the battery top cover when welding explosion-proof pieces.

"the first thing we think of is through simple material improvement, but whether using steel instead of aluminum as the material on the top cover of the battery or increasing the overall thickness of the top cover of the battery, the problem is solved by increasing the cost of the battery or sacrificing the available volume of the battery. after repeated tests and verification, we finally found a good solution in the failure again and again." Zheng Yulian said.

According to reports, in the end, engineers in the Ningde era came up with the method of stamping to form a ring of reinforcement, and solved the technical and economic problems at the same time, which is the first in the industry. Since a ring of strengthening ring protrudes from the outer surface of the battery top cover, it can also resist the electrolyte accidentally spilled on the outer surface of the battery top cover in the process of electrolyte injection, preventing the electrolyte from flowing into the exhaust vent and producing electrolyte crystallization.

However, the perfect solution in the laboratory is only the first step. When it comes to the actual production, transportation and assembly, the engineers of the Ningde era found the problem again. The explosion-proof piece is exposed and very fragile, and the hard object can be pierced easily. In order to achieve the best protection effect, engineers have to add a transparent protective film to the explosion-proof piece.

The protective film effectively blocks external risks, but it also affects the normal testing of the battery. in order to ensure that every battery installed in the car is well sealed, engineers will test each battery before leaving the factory. Inject helium into the battery and check for gas leakage. The protective film blocks the overflow of the gas, which makes the helium test invalid.

"it is not only necessary to leave a channel for gas overflow, but also to prevent the explosion-proof film from being contaminated through the exhaust channel during electrolyte injection. after trying to set up a connecting mechanism, engineers have found the most concise and effective way, that is, to set up a notch on the strengthening ring, which is very small and far away from the liquid injection port, so as to avoid pollution, and at the same time, the notch leaves the necessary outlet for gas emission, which can be said to kill two birds with one stone." Zheng Yulian said.

"with regard to explosion valve technology, we have applied for more than 340 patents worldwide and have so far granted more than 200. for example, one of the core patents, patent number ZL201521112402.7, was created when we improved explosion valve technology in 2015." Zheng Yulian added.

Zheng Yulian said that engineer culture is one of the reasons why Ningde era is ahead of the world in product innovation. Engineers are good at finding problems and coming up with solutions. The company will encourage everyone's every whim and let engineers let go to create. It is with the innovation of components such as explosion-proof valves that engineers continue to accumulate experience and bring more possibilities to power batteries.

Behind the hard core technology is the "no man's land" innovation and solid investment.

Ningde era was founded in 2011, and today, the use of power batteries in Ningde era has been the first in the world for six consecutive years since 2017, and the global market share reached 36.8% in the first half of 2023. At present, Ningde era and almost all the mainstream car companies in the world have established partnerships.

Of course, behind the strength of hard core technology is the innovation and solid input of the "no man's land" of the Ningde era. Ningde era has established four major innovation systems: material and material system, system structure, green limit manufacturing and business model. In the extensive practice of serving more than 9.3 million vehicles, it has formed a unique R & D closed loop confirmed by R & D test data and massive real vehicle feedback.

According to reports, the Ningde era also has a global layout of the R & D system, with five major R & D centers set up in Ningde, Liyang, Shanghai, Xiamen and Munich, Germany, with 17998 R & D personnel. Among them, 21C Innovation Lab has become the research and development highland of cutting-edge technology for global energy storage and conversion.

In 2022, the company's R & D expenses totaled 15.5 billion yuan, an increase of 102% over the same period last year. The company owned and is applying for a total of 16637 domestic and foreign patents, leading or participating in the revision of more than 80 domestic and foreign standards.

In addition, according to Ningde Times, the company has also developed an extreme manufacturing architecture with the goal of zero defect rate, which can produce a cell in an average of 1 second and a module in 20 seconds. At the same time, more than 6800 quality control points can be monitored in real time, with an average of more than 10,000 traceable data per battery, which makes the cell failure rate in Ningde era reach the PPB level, that is, 1/1000000000.

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