Differences between energy storage battery and power battery

Celes

1. Battery capacity

 

Power battery battery energy density is getting higher and higher, according to the standard, the capacity of the power battery is less than 80% can no longer be used in new energy vehicles. For energy storage batteries, the vast majority of energy storage devices do not need to move, so there is no direct requirement for energy density of lithium storage batteries.

 

2. Application Scenario

 

Power lithium batteries are mainly used in electric vehicles, electric bicycles, electric motorcycles and other electric equipment; also used in transmission and substation stations, power units to provide closing current.

 

Lithium battery energy storage is divided into small outdoor energy storage and large base station energy storage, large base station energy storage is mainly used in the battery peak shaving, grid frequency regulation, hydro, wind and photovoltaic rectification, etc., which to peak shaving, earning power differentials.

 

3. Battery Management System BMS

 

In the power battery pack, BMS (battery management system) is the core, which determines the battery pack components, functions can be coordinated, and directly related to the battery pack can be safe and reliable for electric vehicles to provide power output.

 

Energy storage battery management system, similar to the power battery management system, but the power battery system is in the high-speed movement of the electric vehicle, the power response speed and power characteristics of the battery, SOC estimation accuracy, the number of state parameter calculations, there are higher requirements, and the related regulatory functions need to be realized through the BMS.

 

4. Performance and design

 

Power lithium batteries focus more on charging and discharging power and other aspects of the requirements of fast charging rate, high output power, vibration resistance, in particular, emphasizing higher safety and high energy density to achieve long-lasting endurance, as well as weight and volume of the lightweight requirements. Energy storage lithium battery equipment emphasizes battery capacity, especially the requirements of operational stability and service life, more consideration of the consistency of the battery module, the battery material should be concerned about the expansion rate and energy density, electrode material performance uniformity, etc., in order to pursue the overall energy storage equipment, long life and low cost.

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