The difference between power lithium battery and energy storage lithium battery
Although both power lithium battery and energy storage lithium battery are lithium batteries, their properties are entirely different. When we use batteries, we can choose according to our own needs.
1.Different application industries
The power lithium battery is mainly used as the battery for driving power supply of electric vehicles, electric bicycles, electric motorcycles, electric equipment, and tools; It is used for power transmission and transformation to provide closing current for power devices; The energy storage lithium battery pack is mainly used for energy storage power supplies such as hydro power, thermal power, wind power, and solar power plants, auxiliary services for peak shaving and frequency modulation power supplies, digital products, power products, medical security products, UPS power supplies, etc.
2.Different positioning of lithium battery BMS battery management system
In the energy storage system, the lithium energy storage battery only interacts with the inverter, and the inverter takes power from the AC power grid to charge the battery pack; Or the battery pack supplies power to the inverter, and the electric energy is converted into AC power by the inverter and sent to the AC power grid; The BMS battery management system of electric vehicles has an energy exchange relationship with the motor and charger. In terms of communication, the energy storage battery communicates with the inverter, EMS, etc; The information interaction between the BMS of the electric vehicle and the charger during the charging process, as well as the information interaction between the BMS of the electric vehicle and the on-board controller during the entire application process.
3.Use different types of batteries
In consideration of safety and economy, lithium iron phosphate battery is often used as an energy storage battery when selecting a lithium battery pack, and lead acid battery and lead carbon battery are used in some energy storage power stations; The mainstream battery types of electric vehicle power lithium battery include lithium iron phosphate battery and ternary lithium battery.
4.Different performance and design
The power lithium battery pays more attention to the charging and discharging power. It requires fast charging speed, high output power, and impact resistance, with special emphasis on high safety and high energy density, to achieve lasting endurance and lightweight requirements in weight and volume; The preparation of lithium battery for energy storage emphasizes battery capacity, especially operation stability and service life, and more attention is paid to the consistency of battery modules. In terms of battery materials, attention is paid to the expansion rate, energy density, and uniformity of the performance of the electrode materials to pursue the long life and low cost of the entire energy storage equipment.
5.Different life requirements
Compared with power battery, energy storage battery has higher requirements for service life. The life of new energy vehicles is generally 5-8 years, while the life of energy storage projects is generally expected to be more than 10 years. The cycle life of a power battery is 1000-2000 times, while the cycle life of an energy storage battery is generally required to be more than 3500 times.
The above is the introduction to the difference between energy storage lithium battery and power lithium battery. Through the above introduction, we believe that we have a deeper understanding of the difference between energy storage lithium battery and power lithium battery.