Polaris Solar Photovoltaic Network: In recent years, so […]
Polaris Solar Photovoltaic Network: In recent years, solar energy has developed rapidly and spread to various fields, largely due to the decline in solar cells and energy storage costs. As an important part of solar energy products, solar cells have reduced the cost and promoted the rapid development of the solar energy industry. Judging from the overall development trend of China's solar street lamp industry, some institutions expect that the industry's output by 2020 is expected to be around 20.25 million. By 2020, the solar street lamp market capacity will reach 60 billion yuan.
Similarly, with the development of new energy vehicles, lithium battery technology is becoming more mature and cost is reduced, making it possible to apply lithium batteries to solar street lamps. Lithium batteries have more advantages than lead acid or gel batteries. Due to the high energy density of the lithium battery, the volume becomes smaller under the same capacity, which makes the integration of the battery and the lamp possible, and also provides more imagination for the design, making the solar street lamp more beautiful. It makes the transportation installation and maintenance easier; more importantly, the lithium battery has a longer cycle life than the lead acid or gel battery, which makes the life of the solar street lamp longer, which is undoubtedly a photovoltaic lighting. good news.
Under the guidance of national policies such as rural revitalization, Belt and Road, and Four Good Rural Roads, solar street lights should have better development; but with the battery life of new energy vehicles, many batteries have been eliminated, and the national policies and regulations are not standardized. In the case that the use of the technology is not mature, many manufacturers have to deal with these batteries at low prices, even at tons, so the price is extremely low, and some costs may be 1/5-1/ of normal batteries. 10 does not wait. How long can these batteries last? The seller’s mentality is not at the end. Therefore, these products are not guaranteed by themselves, and because many are cash transactions, there is no guarantee after the transaction is completed.
Where are these batteries that have been eliminated? What is the use? It is understood that many of the batteries that have been eliminated are flowing into the solar streetlight industry, which adds another fire to the solar street lamp market, which is inherently lacking in standards. The industry is even more uneven, and the price and quality gaps are even greater. Not only that, some manufacturers even openly claim that the battery life of the car can be eliminated for 15 years, and the warranty is 5 years. Xiaobian is also wondering: the quality of the battery sellers who have been eliminated does not dare to have any commitment, and can only be traded in cash. How can these solar street lamp manufacturers use the 15 years?
Because this kind of ethos spreads fast in this industry, it is really beyond imagination. It seems that overnight, people will think that solar street lights should use such batteries, so Xiaobian is trying to figure out the difference between normal battery and battery elimination. Specially combined with some battery suppliers to do industry research, get some data, and let everyone understand the secrets through data and analysis.
Analysis from a key technical perspective
What is the use of the ladder? For example, the battery is used in a new energy vehicle. The battery is fully charged with 100% energy. After a period of use, the battery capacity will be attenuated. The battery that has been attenuated from the car has a battery capacity of 80. The %-20% interval can be used as a ladder, such as in low-speed cars, electric tricycles, and energy storage in charging stations. The state also promotes this method, but the use of the ladder can not be applied casually. The core of the ladder utilization is to carry out some complex detection and analysis of the original products, scientifically judge the life cycle value and reusability, and design the conformity. The gradient grade and application area of the product.
In addition, the use of the ladder requires a rigorous testing process. In the "Recovery of Residual Energy for Lithium-Ion Battery for Vehicles", the operating procedures for decommissioned lithium-ion batteries should be carried out with strict inspection procedures and high safety requirements. However, the key technologies used in the current stage are not mature enough, and some technical difficulties have not yet been resolved. The key technologies for the use of the cascade are two: one is the discrete integration technology, the different battery pack technologies are different, and the disassembly requires the integration of different single cells according to the performance and life of the battery module; Technology: Estimated by SOC, SOH, and SOP technical indicators provided by BMS.