What is energy storage system
New energy power stations and photovoltaic systems need to be equipped with energy storage of relevant proportions. At the same time, the ratio of peak to valley electricity price difference is increased, so there is a certain opportunity for the development of energy storage at the user side. In order to understand the energy storage related industry chain, here is a science popularization of energy storage related knowledge points for novices.
Explanation of professional terms
EMS: Energy Management System
PCS: energy storage converter
BMS: Battery Management System
LFP: lithium iron phosphate
Energy storage application scenario
1.Power generation side
Location: beside centralized new energy power station
Function: 1) reduce abandonment; 2) Stabilize fluctuation
2.Grid side
Location: independently constructed or located next to the traditional power station
Functions: 1) FM; 2) Peak shaving
3.Power side
Location: home, factory, office building, communication base station backup power supply, data center backup power supply
Functions: 1) Self use; 2) Peak cutting and valley filling
Lithium battery energy storage system
Considering the cost performance and safety, lithium batteries are widely used in the market for energy storage. Now let’s understand the composition of the lithium battery energy storage system.
1.Battery pack: It is composed of multiple battery modules (multiple cells in series and parallel and fixed devices), accounting for about 60% of the cost of the energy storage system
2.BMS: responsible for battery inspection, evaluation, protection and equalization
3.PCS: control the charging and discharging process of the battery pack, and conduct AC/DC conversion
4.EMS: responsible for data acquisition, network monitoring, energy scheduling, etc
