The "pain point" of lithium battery has great business opportunities
With the promotion of China‘s "dual carbon" related work and the soaring production and sales of new energy vehicles, the lithium battery sector will become "hot" in 2021. With the rapid development of lithium battery industry, the related accidents exposed began to worry people. In the future, how to improve the economy of lithium battery energy storage on the premise of ensuring safety? The insiders pointed out that energy storage safety is a systematic project, and some enterprises have made great breakthroughs in relevant technology attempts.
Lithium battery safety concerns remain
With the rapid promotion of lithium batteries, some potential safety hazards have emerged, especially in the application fields of lithium batteries with large capacity, such as electric vehicles and energy storage power stations.
According to the statistics of Energy Storage Application Branch of China Chemical and Physical Power Supply Industry Association, lithium iron phosphate battery accounts for nearly 90% of the current domestic electrochemical energy storage market, which is the mainstream technology route and one of the technologies with the fastest commercialization process.
As far as safety is concerned, lithium iron phosphate battery technology enjoys a high reputation in the industry. In the field of electrochemical energy storage, lithium iron phosphate battery is the first choice for domestic large-scale energy storage power plants at this stage.
In the current mainstream lithium battery technology route in China, the advantages of lithium iron phosphate battery are obvious, such as high safety and stability, long cycle life, low environmental pollution, and high cost performance.
Energy storage safety is a system engineering
However, even the lithium iron phosphate battery, which is famous for its high stability in the industry, will have an internal short circuit fault, which will lead to a fire accident. Can we rest assured of the safety of the lithium battery?
From a professional point of view, there are many reasons for the internal short circuit of the battery. For example, the lithium battery itself may have some small defects in the manufacturing process, which may cause a short circuit; During use, impact, overcharge or overdischarge may also cause short circuit.
The safety of lithium batteries should be treated rationally. Even fuel vehicles have the risk of fire and explosion. As a technology based on chemical reaction principle, electrochemical energy storage is difficult to achieve absolute safety, but it may not affect people‘s safe use. The key is to reduce its unstable and uncontrollable safety risks to a low enough level and control the impact of the accident within an acceptable range.
Open a new blue ocean of security and development
Safety is the premise and lifeline of lithium battery industry development. On the premise of keeping this lifeline, the goal of power lithium battery is to achieve high energy density; The purpose of lithium battery for energy storage is to achieve long cycle life to reduce costs. Considering these two points, the most promising technology route in the field of electrochemical energy storage in the future should be the lithium iron phosphate battery technology grafted by solid-state technology.
In addition to the battery technology itself, many industry insiders interviewed believe that the optimization and technical upgrading of the lithium battery energy storage system are also important aspects to ensure safety. In this field, domestic enterprises still have much room for improvement.
Due to the different cost control capabilities of each energy storage enterprise and the imperfect detection and safety standard system in the field of large-scale electrochemical energy storage, it is still difficult to accurately assess the safety level of some energy storage battery systems. To improve the safety level of large-scale lithium battery energy storage requires the joint efforts of the whole industry.
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