What Is The Difference Between Power Battery And Energy Storage Battery?

For energy storage batteries, most of the energy storage devices do not need to be moved, so lithium energy storage batteries have no direct requirements for energy density. As for power density, different energy storage scenarios have different requirements.
It is used for power peak-shaving, off-grid photovoltaic energy storage, or peak-valley price difference energy storage scenarios on the user side. Generally, the energy storage battery is required to be continuously charged or discharged for more than two hours, so it is appropriate to use a capacity-type battery with a charge-discharge ratio ≤ 0.5C; For the energy storage scenario with power frequency modulation or smooth renewable energy fluctuations, the energy storage battery is required to be charged and discharged rapidly in the time period from second level to minute level, so it is suitable for the application of ≥ 2C power type battery; In some application scenarios where frequency modulation and peak shaving are required at the same time, energy-type batteries will be more suitable. Of course, in this scenario, power-type batteries and capacity-type batteries can also be used together.
Compared with the power lithium battery, the energy storage lithium battery has higher requirements for the service life. The life span of new energy vehicles is generally 5-8 years, while the life span of energy storage projects is generally expected to be more than 10 years. The cycle life of power lithium battery is 1000-2000 times, while the cycle life of energy storage lithium battery is generally required to be greater than 3500 times.
In terms of cost, power lithium battery faces the competition with traditional fuel power source, while energy storage lithium battery needs to face the competition with traditional peak shaving and frequency modulation technology. In addition, the scale of energy storage power stations is basically more than megawatts or even 100 megawatts, so the cost of energy storage lithium batteries is lower than that of power lithium batteries, and the safety requirements are higher.