As a "new infrastructure" leading industry, 5G construction is entering a peak period.On March 4, China Mobile issued a bidding announcement for the centralized procurement of lithium iron phosphate battery products for communications in 2020. It plans to purchase a total of 610.2 million Ah (specification 3.2V) for lithium iron phosphate batteries for communications that does not exceed 2.508 billion yuan. For 1 year.China Mobile Bidding Information Source: China Mobile Official Website"The demand for the construction of 5G base stations for lithium iron is doubled or even increased several times." The Secretary-General of Zhongguancun New Battery Technology Innovation Alliance Yu Qingjiao said.Lithium iron phosphate replaces lead acid"According to our understanding, China Tower purchased 30 to 40 billion yuan of batteries last year." Yu Qingjiao revealed that lithium iron phosphate battery is the most suitable technology route for 5G base station energy storage at this stage. With the commercial promotion of 5G, iron phosphate Lithium batteries will usher in a new dividend period.According to reports, the communication backup power supply is usually assembled in the base station computer room with a battery cabinet, which provides emergency power in the event of a power outage in the base station, which guarantees the normal operation of the base station and smooth communication.Yu Qingjiao further explained: "China Tower has been cooperating with Ningde Times, Yiwei Lithium Energy, and Nandu Power for the past two years. On the one hand, your power battery (retired) can be used in gradients, and what you produced is I can also use the battery directly. At present, the amount of gradient batteries is not too large, there are so many specifications and manufacturers, it is difficult to use them together. "
Overview The battery management system (BMS) is a set of control systems that protects the safety of power battery usage. It monitors the battery usage status at all times, alleviates inconsistencies in the battery pack through necessary measures, and provides guarantee for the safety of new energy vehicle use. As a domestic high-quality power system supplier, Hengrun Technology has strong strength and rich experience in the development of control systems, and can provide customers with high-quality engineering and supporting services in the development of battery management systems. BMS hardware topology The BMS hardware topology is divided into two types: centralized and distributed. Centralized is to concentrate all the functions of the battery management system in one controller. It is more suitable for the occasion where the battery pack capacity is small and the module and battery pack type are relatively fixed, which can significantly reduce the system cost. Distributed is to separate the main control board and the slave control board of the BMS, and even separate the low-voltage and high-voltage parts to increase the flexibility of system configuration and adapt to modules and battery packs of different capacities and different specifications. can provide various centralized or distributed BMS hardware solutions mentioned above. State estimation and equilibrium control of BMS Aiming at the inconsistencies in the manufacturing and use of the battery, and the changes in battery capacity and internal resistance with the battery life cycle, the Hengrun technology team creatively applied multi-state joint estimation, extended Kalman filtering algorithm, internal resistance / capacity online identification, etc. Method to achieve high-precision state estimation of the battery's entire life cycle. According to calculations, for ternary lithium batteries, the estimated deviation of the SOC of the single battery at room temperature can reach a maximum of 2%, and the average estimated deviation is 1%. At the same time, aiming at the inconsistencies between battery cells, a balanced strategy based on the remaining charge capacity is used to maximize the maximum energy efficiency of the battery. Quick identification of shorts in the battery The short circuit in the battery is the most complicated and difficult to determine the cause of thermal runaway. It is an international problem in the field of battery safety and can lead to disastrous consequences. The short circuit in the battery cannot be completely eliminated. At present, it is generally observed through a long period of stay (more than 2 weeks) in order to detect the problem early. In terms of battery internal short circuit identification, Hengrun Technology has more than 10 leading patents and patent licenses worldwide. Using the symmetrical ring circuit topology (SLCT) and related algorithms, batch short-circuit detection can be performed on multiple battery cells in a short period of time (within 5 minutes), and internal short-circuits on the order of 0 to 100 kΩ can be identified and accurately estimated. Internal short resistance value. This method can significantly reduce the operating costs of cell manufacturers or module assembly manufacturers, and improve the safety of battery production and use.
According to people familiar with the matter, Tesla is at an advanced stage of the negotiations and the company will use cobalt-free CATL batteries (cobalt is one of the most expensive metals in electric vehicle (EV) batteries) in cars produced at its Chinese plant. This will be the first time the U.S. automaker has added a so-called lithium iron phosphate (LFP) battery to its product lineup as the company struggles to reduce production costs amid staggering sales of overall electric vehicles in China.A person directly involved in the matter said that Tesla has been discussing with Chinese manufacturers for more than a year to provide "double-digit" LFP batteries that are cheaper than its existing batteries. The media refused to be found.Tesla and CATL declined to comment. Electric vehicle manufacturers typically use nickel-cobalt-aluminum (NCA) or nickel-manganese-cobalt (NMC) batteries in passenger cars because of their higher energy density, which is critical to determining how far an electric vehicle can travel on a single charge.People familiar with the matter told Reuters that in order to improve the density and safety of LFP batteries, CATL has been studying its so-called battery-to-battery packaging technology.A person familiar with the matter said it is unclear to what extent Tesla intends to use LFP batteries, but the automaker has no plans to stop using its existing NCA batteries.Tesla has been investing $ 2 billion in its new Shanghai plant to expand production of its Model 3 cars and to win market share from traditional luxury car makers by reducing prices, such as Germany's BMW and Daimler. Tesla began delivering cars from factories in December, helping to save on transportation costs and tariffs on imported models. The company is currently seeking regulatory approval to produce longer-range Model 3 cars at the plant.Industry data shows that sales of new energy vehicles in China (referring to pure batteries, plug-in hybrids and fuel cell vehicles) may fall by 54.4% in January, partly because of the beginning of the first day of the lunar calendar earlier than the beginning of last year. And the impact of a new coronavirus outbreak in China.The use of LFP batteries will also help CEO Elon Musk fulfill its 2018 promise that Tesla will reduce the use of cobalt, which costs about $ 33,500 per ton, "nearly".Musk told a profit conference in January that Tesla plans to host a battery event in April to share its future battery strategy and technology.
On June 6, an annual EMD (EMD) post-treatment production line with an annual output of 15,000 tons was put into operation and an EMD technological transformation project with a total annual output of 10,000 tons of new energy and new materials for automobile power cells was marked. Car battery-specific EMD base construction into a new stage of implementation. Municipal People 's Congress Standing Committee Vice Director Wei Fengguang, CPPCC Vice Chairman Jiang Wen - shu attended the ceremony and cut the ribbon for the project.The implementation of the project in Guangxi Shimoda manganese limited liability company Guangxi Guangxi Liu Chemical Co., Ltd. under the jurisdiction of the subsidiary, the leading product electrolytic manganese dioxide, the current production scale of 12,000 tons / year. At present, the company plans to invest 120 million yuan, the implementation of an annual output of 10,000 tons of electric vehicles EMD power battery technology projects. After the project put into production, the annual industrial output value of 120 million yuan, profits and taxes 30 million yuan.It is understood that the product of the project is Japan Nissan Motor Company pure power automotive battery designated special materials, with broad market prospects. At present, Nissan Motor Corporation of Japan produced the world's first production of pure power car has been on sale, plans to produce 1 to 2 years, 100,000, 5 years, plans to produce 1 million sales, to be dedicated EMD products 100,000 tons.
Recently, Guizhou Tongren District and Hong Kong Hongji Albert Investment Co., Ltd. reached a total investment of 5 billion yuan of manganese lithium batteries and its key materials, intensive processing projects, the two sides and formally signed an agreement. It is understood that Tongren region manganese, vanadium and other mineral resources, mineral development is also an important industrial pillar of the region. In order to further extend the industrial chain and enhance value-added products, the region actively introduce powerful enterprises, to carry out the development of mineral resources and intensive processing, Hongji Albert had previously acquired the Tongren District Heavy Hill Mining Co., Ltd. and its affiliated enterprises.