How should the lithium battery industry be developed with the theme of energy conservation and environmental protection?

"Haze" has once again become the focus of attention of Representatives and members of the two national committees this year. As a result, as energy conservation and environmental protection of the new energy automotive industry ushered in great development. However, the new-energy batteries that power it are experiencing are experiencing a "huge earthquake" in the industry and will continue to "aftershocks".

All of this was due to a brief statement by Zhangxiangmu, Director of the Equipment Industry Department of the Ministry of Industry and Information Technology, at the relevant meeting. "The Ministry of Industry and Information Technology will organize a risk assessment of the three-member lithium battery before the evaluation is completed. Suspension of three yuan lithium-battery passenger car included in the new energy vehicle promotion application recommended vehicle catalogue. "

Words have just fallen, causing a lot of speculation and the new energy power battery industry for the future of three lithium battery concerns. For example, manufacturers involved in the three-way lithium battery business have proposed that under the current technology, whether there is a hidden danger in the three-way lithium battery, whether it can be overcome through technological innovation; Whether there are prospects for development in the future, when the "suspension order" of the Ministry of Industry and Information Technology will be unsealed and many other questions.

To this end, the recent "China Business News" reporter visited a number of three-yuan lithium battery manufacturers in the field and tried to solve many of the above questions, and hoped to promote the healthy and orderly development of the new-energy power battery industry through multiple interviews.

Sudden suspension cause controversy.

On January 24th, Zhangxiangmu, Director of the Equipment Industry Department of the Ministry of Industry and Information Technology, said at the 2016 China Electric Vehicle 100 People's Association "Development and Breakthrough of Power Battery" theme summit that the suspension of the Sanyuan Lithium-ion Battery Passenger Car was included in the list of recommended models for the promotion and application of new energy vehicles.

As soon as the above news came out, it immediately triggered controversy from the outside world. In particular, the manufacturers of the three-element lithium battery reacted strongly. In an interview with the China Business Daily, a representative of a manufacturer of three lithium batteries who did not want to be named said that although there have been rumors in the market, the Ministry of Industry and Information Technology suspended the listing of three lithium batteries in the passenger car new energy car catalog. It is still somewhat sudden.

"On January 24, 2016, the three-Yuan lithium battery could not be logged in to the directory. On February 24, the Ministry of Industry and Information Technology announced the 'suspension order', which was only 10 days apart. The above person told reporters that although the three-part lithium battery started late in China, many production companies have already deployed related projects in various places. The estimated investment scale has exceeded 100 billion Yuan, and in the absence of a specific assessment process, suddenly suspended the three-part lithium battery. Subsidy This is undoubtedly the "harm" to the three-way lithium battery industry.

As for whether there is a missing evaluation process, the manufacturer said that before the issuance of the "suspension order" by the Ministry of Industry and Information Technology, like most of the three lithium battery manufacturers, did not receive relevant evaluation reports or seek opinions.

At the same time, the person said that the Ministry of Industry and Information Technology issued a "suspension order" for Sanyuan lithium batteries from the Automobile Association, not the battery Association, the China Chemical and Physical Power Industry Association.

Who's safer?

So, what specific factors prompted the Ministry of Industry and Information Technology to "suspend" the move on the ternary lithium battery, whether it is really "missing the evaluation process" as mentioned by the above person.

In this regard, Huangxuejie, a researcher at the Institute of Physics of the Chinese Academy of Sciences, said that summarizing the experience of past accidents, it can be found that the 18650 battery of nickel-cobalt aluminum ternary material will self-heat above 180 °C, while lithium iron phosphate material will appear above 250 °C. exothermic phenomenon. Therefore, lithium ternary materials are more likely to catch fire or cause accidents than lithium iron phosphate materials only in terms of the positive material characteristics of lithium ion batteries.

For Huangxuejie's claim, the head of the battery industry does not agree. The person in charge told reporters that whether it is a lithium ternary battery, a lithium iron phosphate battery, or other energy batteries, to be put into use, or mass production, the first thing to consider is safety, but this safety is not only the source theory and simulation test. It is even more important to believe in the conclusions reached by practice.

Judging from the number of electric vehicle fire accidents that occurred in China after 2011, in fact, there are more fire accidents caused by lithium iron phosphate batteries than three lithium batteries. According to public reports in the media, from 2011 to the present, of the 22 new energy vehicle fire accidents in China, 20 were caused by lithium iron phosphate batteries and 2 were caused by three lithium batteries. Obviously, the safety performance of the three-element lithium ion battery is no worse than that of the lithium iron phosphate battery, or even better.

The safety of product use is an issue that government departments should consider, but it is not considered because of safety that the existing policy is changed without systematic assessment. A battery industry person told reporters about the safety of battery system products, including electrical safety, mechanical safety, functional safety, chemical safety and so on. Therefore, the safety of the entire vehicle is relative, not simply from the core itself, but to look at the overall safety parameters after the pack integration. A good pack integration technology can completely make up for some of the defects caused by the core itself.

In addition, the person also said that in the international community, there is no single standard for materials in any functional department, only standards for vehicles. This is mainly due to the fact that as the security measures of the battery system are gradually improved, the safety hazards caused by materials will be gradually reduced.. By adopting high safety diaphragm, flame retardant electrolyte and liquid cooling, the safety of the battery can also be guaranteed.

Anhui Huanxin Group and the global battery manufacturing company South Korea Samsung SDI set up an electric vehicle battery dedicated factory "Sanxinghuan New Power Battery Co., Ltd."(hereinafter referred to as "Sanxinghuanxin"). In view of safety considerations, Sanxinghuan's new automotive application battery, Has 3 to 4 stages of various safety devices to ensure the safety of the battery unit from the production stage to the module, battery package stage.

From the material stage, the new three-star ring battery uses a material with strong heat resistance, a device that automatically emits gas when the pressure in the battery increases, and a device that prevents the current in the battery from exceeding the normal range. In addition, when the battery is overcharged, the circuit of the current is forcibly cut off to improve the safety of the battery.

For modules and battery packs, heat-resistant materials and high-temperature materials that can prevent impact and fire spreading are involved and used. Battery units use heat-resistant devices and techniques that can monitor battery unit status in real time are applied.

In addition, it is monitoring from foreign body management, temperature management and other aspects. At the same time, Samsung Ring's new battery can also be followed up after the sale of the product, recording the lifetime system, which means that each newly sold battery in Samsung Ring will be safe for life, and if there is an accident, it can also be traced back to the source.

As a result, Samsung believes that only high-quality batteries with the best safety can improve the competitiveness of the company, thus establishing the company's position in the market.

Make it quick.

Not all companies are able to invest as heavily as Samsung Ring in ensuring the safety of batteries from production to sales. In the domestic new energy battery industry, there is also a new industry. The good and bad companies are mixed. In terms of investment, some invest billions of dollars. Some invest tens of millions of dollars, so it is not appropriate to simply say which type of battery is safe or unsafe.

In order to promote the healthy and orderly development of the battery industry, the relevant person in charge of the battery company should raise the industry threshold and formulate a corresponding evaluation system.

This statement was agreed by Liuyanlong. Liuyanlong believes that it is difficult to assess the final safety of the three-element lithium battery system because of the lack of corresponding evaluation system in China. The single battery composition will design the battery pack according to the conditions of use of the vehicle. By strengthening the monitoring of the entire production process, the safety of the three-element lithium battery system can be effectively improved, but the final safety needs to be determined by the corresponding evaluation system.

Wangbinggang, a specialist in major technology projects for electric vehicles at the ministry of science and technology, said the same. Wangbinggang believes that the selection of battery materials can not fundamentally solve the problem of battery safety. We should start with the establishment of strict quality requirements and regulatory methods for battery products.

As for why we should raise the industry threshold, the vice president of the above-mentioned enterprises told reporters that profits are the guarantee for the survival of the company. However, in the battery industry, safety is the lifeline of the company. Some enterprises ignore safety investment in order to obtain greater benefits. This makes it difficult to ensure quality safety.

Even some companies put into the battery industry because they value the state's subsidies. As for the safety of products, they do not attach great importance to it. It is precisely because of this situation that the outside world is worried about the safety of ternary lithium batteries. However, if carefully combed out, safety accidents often occur in small factories that partially ignore safety inputs, rather than in certain industries.

Liuyanlong also said that some of the domestic leading power battery companies are dominated by iron lithium. In 2012, the policy supported 8 companies, each with 150 million Yuan in funding support. Afterwards, everyone from the development direction of the national policy. Think that the country will turn more toward three Yuan in the future. In the follow-up, many companies used the development of ternary technology as the direction of the technology route, and invested a lot of funds. Battery production also increased dramatically, and battery production also increased.

Therefore, in the face of the development opportunities of the new energy power battery industry, a number of experts interviewed and business people agreed that relevant industry standards should be promulgated as soon as possible to raise the industry threshold in order to ensure the healthy and orderly development of the industry.

So is there an industry standard for the safety of new energy powered batteries at home or abroad?

In this regard, the reporter combed out public information and learned that in the country, the official issued standards for battery safety industry (QC/T), the national standard(GB/T) will come into effect in July this year, and will be certified by a third-party agency authorized by the Ministry of Industry and Information Technology.

If there are doubts about safety, according to the normal process, the enterprises that have been certified by the current standards should first be returned to the directory. At the same time, the government, academia, and related enterprises should participate in the study and formulation of new standards to enhance safety. The new catalogue will be developed after the evaluation and certification of all battery products in accordance with the new standards, which is fully indicative and credible.

In Japan and South Korea enterprise technology leading situation, promoting the development of the Chinese ternary system is particularly urgent. Mr Songhuajie, deputy senior engineer at Bic Battery Research and Development Center, called for a quick solution to the problem and encouraged the healthy and steady development of the Sanyuan lithium battery.

The page contains the contents of the machine translation.