Analyze power lithium battery and energy storage lithium battery technology

Power lithium batteries and energy storage lithium batteries are used to store energy. From the perspective of utilities, all of this has to do with energy storage. Therefore, all lithium batteries are energy storage lithium batteries. Later, in order to distinguish their uses, they were divided into consumption, electricity, and energy storage according to the scene. Consumer applications are used in consumer products such as mobile phones, laptops, and digital cameras. Electricity is used in electric vehicles, and energy storage is used in power stations. Power lithium-ion battery is actually a kind of energy storage battery. It is mainly used in electric vehicles. Due to the size and weight of the car and the acceleration of the engine, the power lithium-ion battery has a higher energy density than ordinary batteries. The highest possible battery charges faster and discharges more, but the requirements for ordinary energy storage batteries are not very high. From the perspective of application scenarios, lithium battery power is mainly used for electric vehicles, electric bicycles and other electric tools, and lithium battery energy storage is mainly used for peak frequency adjustment auxiliary services, renewable energy grid-connected, micro-grid, etc. Battery performance requirements vary according to different scenarios. First of all, as a mobile power source, power lithium batteries should have as high a volume (and mass) energy density as possible to achieve longer durability in a safe manner. In short, users hope that electric vehicles can be charged safely and quickly. Therefore, power lithium batteries have higher requirements for energy density and power density, because safe batteries with 1C charge and discharge capacity are widely used for safety reasons. Most energy storage devices do not move, so lithium batteries have no direct requirements for energy density. Regarding power density, different energy storage methods have different requirements. It is used for power peak shaving, off-grid photovoltaic energy storage or customer peak and valley expansion energy storage scenarios. Under normal circumstances, the battery should be continuously charged and discharged for more than 2 hours. Therefore, it is suitable for capacitive type with charge and discharge rate ≤0.5c. Battery: In energy-saving or stable energy-saving energy storage scenarios, the energy storage battery needs to be quickly charged and discharged within seconds to minutes, which is suitable for batteries with ≥2C power. Energy batteries are more suitable for peak use. Of course, in this case, the power supply and the capacity battery can also be used at the same time. Compared with power lithium batteries, energy storage lithium batteries have higher requirements for life. The lifespan of new energy vehicles is generally 5-8 years, while the expected lifespan of energy storage projects is generally more than 10 years. The life of power lithium battery is 1000-2000 times, and the cycle life of energy storage lithium battery is generally required to be more than 3500 times. In terms of cost, power lithium batteries face competition from traditional fuel power sources, while energy storage lithium batteries have to face cost competition from traditional peak shaving and frequency modulation technologies. In addition, the planning of energy storage power stations is basically higher than megawatts or even 100 megawatts. Therefore, the cost of energy storage lithium batteries is lower than the cost of power lithium batteries, but also safety. There are some differences between lithium power lithium ion batteries and lithium energy storage batteries, but they are the same in terms of batteries. You can use lithium iron phosphate batteries and ternary lithium batteries. The important difference lies in the power response speed of the BMS battery management system and the battery. Power characteristics, SOC estimation accuracy, and charge and discharge characteristics can all be realized on BMS. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Analyze the history of lithium battery cathode materials