What is the difference between power lithium ion battery and energy storage lithium ion battery

In fact, the power lithium battery is also a kind of energy storage battery, which is mainly used in electric vehicles. Due to the limitation of vehicle size and weight, as well as the requirements of starting and acceleration, the performance requirements of power lithium batteries are higher than that of ordinary energy storage batteries. If the energy density is higher, the charging speed of the battery is faster and the discharge current is larger, but the requirements for ordinary energy storage batteries are not very high. According to this standard, the capacity of power lithium batteries is less than 80%, so they can no longer be used in new energy vehicles. However, with slight modifications, it can also be used in energy storage systems. From the perspective of application scenarios, power lithium-ion batteries are mainly used in electric vehicles, electric bicycles and other electric tools, while energy storage lithium-ion batteries are mainly used in peak and frequency modulation power auxiliary services, renewable energy grids and microgrids. Due to different application scenarios, the performance requirements of the battery are also different. First of all, as a mobile power source, the power lithium ion battery, under the premise of safety, the higher the volume (mass) energy density, the better, in order to achieve more durable durability. At the same time, users also hope that electric vehicles can be charged safely and quickly. Therefore, for safety reasons, power lithium-ion batteries have put forward higher requirements for energy density and power density. At present, energy batteries with a charge-discharge capacity of about 1C have been widely used. Most energy storage devices do not move, so energy storage lithium-ion batteries have no direct requirements for energy density. Regarding power density, different energy storage methods have different requirements. Regarding user-side peak shaving, off-grid photovoltaic energy storage, or peak-to-valley energy storage, energy storage batteries generally need to be continuously charged or discharged for more than 2 hours, so it is suitable to use capacity batteries with a charge-discharge rate of ≤0.5C. Regarding power frequency modulation or renewable energy energy storage occasions with stable fluctuations, the energy storage battery needs to be quickly charged and discharged within seconds to minutes, so it is suitable for applications with ≥-2C power lithium batteries. In some application scenarios where frequency modulation and peak shaving are to be performed at the same time, energy batteries will be more suitable. Of course, in this case, the power source type can also be used with capacity batteries. Compared with power lithium-ion batteries, energy storage lithium-ion batteries have higher service life requirements. The service life of new energy vehicles is generally 5-8 years, while the service life of energy storage projects is generally more than 10 years. The cycle life of power lithium-ion batteries is between 1000 and 2000 times, while the cycle life of energy storage lithium-ion batteries is generally more than 3500 times. In terms of cost, power lithium-ion batteries are facing competition with traditional fuel power sources, while energy storage lithium-ion batteries have to face the cost competition of traditional peak and frequency modulation technologies. In addition, the scale of energy storage power stations is basically megawatts or even more than gigawatts. Therefore, the cost of energy storage lithium-ion batteries is lower and the safety is higher than that of power lithium-ion batteries. Disclaimer: Some pictures and content of articles published on this site are from the Internet, please contact to delete if there is any infringement. Previous: Introduction to the characteristics of lithium-ion battery packs