Energy Storage Systems

What is ESS?

Energy storage systems, often referred to as ESS, play a fundamental role in helping with the intermittent nature of renewable energy and provide reliable supply of energy.

How does an ESS work?

The most common source of power used in an ESS is solar energy. By installing solar panels on the roof or backyard, sunlight is converted into DC electricity which allows power to be generated for the ESS in a convenient and easily accessible way to the commercial and residential sectors.

Electrochemical energy storage system is mainly composed of battery pack, battery management system (BMS), energy management system (EMS), energy storage converters (PCS) and other electrical equipment. The battery pack is the most important component of the energy storage system. Battery management system is mainly responsible for battery monitoring, evaluation, protection and balance, etc. The energy management system is responsible for data acquisition, network monitoring and energy scheduling. The energy storage converter can control the charging and discharging process of the energy storage battery pack and convert AC to DC.

In the cost composition of energy storage system, battery is the most important component of energy storage system, accounting for 60% of the cost. The second is energy storage inverter, accounting for 20%, EMS (energy management system) costs account for 10%, BMS (battery management system) costs account for 5%, and other costs account for 5%.

In 2021, lithium-ion batteries accounted for 89.7% of the installed electrochemical energy storage capacity, which is relatively mature at present.

The fastest growing energy storage. Lithium-ion batteries consist of a positive terminal, a negative terminal, a separator and an electrolyte

Flow products commonly used in the positive electrode nickel manganese cobalt ternary materials or lithium iron phosphate, the negative electrode for graphite and other carbon materials. Lithium ion battery

It has the advantages of high energy density, no memory effect, fast charging and discharging, fast response speed, and is widely used in wind power photovoltaic

And other new energy power generation side distribution and storage and user side energy storage projects.