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CTECHI is an expert in battery solutions, specializing in ODM, OEM, and SKD for energy storage, motive power, and consumer batteries.

Lithium battery packs urgently need to strengthen resource recycling and life cycle management

Focus: Lithium battery packs urgently need to strengthen resource recycling and life cycle management. The cascaded recycling of lithium battery packs has always been a focus issue, and it has not yet been completely resolved. Some experts pointed out that my country should establish a full life cycle management of power and energy storage battery systems, strengthen the comprehensive utilization of resources, and jointly promote the sustainable development of society.

At present, the state emphasizes the need to formulate power battery recycling management methods and establish a power battery cascade utilization and recycling management system, so that resources will not be wasted. Electric cars, smart phones, smart bracelets, sweeping robots...Electronic products have gradually become people's necessities. What follows is that power and energy storage batteries are more and more widely used in various fields of production and life. In this process, the safety of large-capacity lithium battery packs, the recycling and processing of waste batteries, and the cascading utilization have become the focus of social concern.

Lithium battery pack dilemma to be solved

According to the statistics of China Chemical and Physical Power Supply Industry Association, China has become a global lithium battery pack. The most active area for battery pack development. In 2016, China's lithium battery market was about 111.5 billion yuan, and the demand for power lithium batteries was 60.5 billion yuan, a year-on-year increase of 65.8%. In 2020, the demand for power batteries will reach five times that of 2015.

Although my country's battery output is the largest in the world, the profit per unit production capacity is lower than that of Japan. The reason why my country's battery industry has high output and low income is the lack of independent intellectual property rights. There is a certain gap between China and developed countries in the level of core raw materials and components of lithium battery packs, and the production process. The endurance of new energy vehicles is a prominent reflection of the level of lithium battery packs. Data shows that in 2017, my country's new energy vehicle ownership was 1.53 million, and it is expected to exceed the 5 million mark in 2020. However, the endurance of most electric vehicle batteries may not be able to support vehicles from Shanghai to Hefei.

The used lithium battery pack leaves many hidden dangers. Sun Shigang, the executive chairman of the meeting, a professor at Xiamen University, and an academician of the Chinese Academy of Sciences, said that used lithium batteries have potential safety hazards such as explosions and serious environmental pollution.

The implementation of full life cycle management methods is urgently needed

In the eyes of experts, 'full life cycle management' is expected to be a solution Lithium battery pack is an effective solution for many problems. The whole life cycle management can be divided into three stages: design and production, one-time use, and cascade utilization and recycling.

In 2016, just over a month after the release of the Samsung Galaxy Note 7 mobile phone, more than 30 explosions and fire accidents caused by battery defects occurred worldwide. In order to avoid such accidents, it is necessary to improve the battery design. In terms of the design method, the method of setting various design parameter spaces in advance through the model and conducting experimental verification before putting it into production can focus on the stability of the production line and product safety, and carry out the three-line integration of the test line, the pilot line and the mass production line. Fast transition.

Accurate assessment and prediction of the state of lithium-ion batteries is the key to efficient use of power systems. On the one hand, for battery systems that have been in service for a long time, it is necessary to evaluate and predict the performance of their different life stages; on the other hand, it is also necessary to evaluate the evolution of safety performance during the full life cycle of the battery system.

The cascading use of waste batteries is expected to promote a circular economy. For example, used low-capacity lithium battery packs can be applied to low-speed vehicles and energy storage. After the capacity is exhausted, they can be broken and decomposed to extract effective substances. At present, researchers have made certain progress in the recycling process of lithium battery packs, and have developed a new recycling process that uses waste anode graphite as a reducing agent. This process is more efficient and low-cost, can make full use of its contained heat and reducibility, and at the same time enrich the recycled lithium resources, which has environmental and economic benefits.

Effective supervision is urgently needed

In the opinion of experts, the current supervision of lithium battery production, use, and recycling Still in a state of disorder. In the early stage of battery design and production, relevant agencies have not yet established standards and conducted effective supervision. The design of the lithium battery pack is the prerequisite foundation for the realization of the decomposition and recycling of green and environmentally friendly materials.

The country should clarify the relevant legal system and regulate the responsibility attribution of the post-consumer recycling process and recycling stage. At the same time, the administrative department should strengthen market regulation, optimize organization and management, and further improve the supervision mechanism for the full life cycle system.

Lithium battery pack energy saving and environmental protection have become development requirements

With the development of technology and economy, energy and environmental problems are increasing Outstandingly, the uninterruptible power supply industry is required to develop 'green and environmentally friendly'. From the perspective of my country's policy trends, various countries have introduced various policies to increase support for low-carbon and environmentally friendly economies, which undoubtedly provide better opportunities for the development of low-carbon and environmentally friendly economies.

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