Industrial and commercial energy storage system structure
Industrial and commercial energy storage systems and energy storage power
station systems are mainly composed of battery systems, battery management
systems (BMS), energy management systems (EMS), energy storage converters (PCS)
and other electrical equipment.
Energy storage battery is the core component of energy storage system.
Different types of batteries have different characteristics and applicability.
Today, lithium-based systems are the fastest growing and most widely deployed
type, accounting for more than 90% of the market share.
The battery is the key component in the battery system. It stores energy
for use when needed. The battery consists of a fixed number of lithium
batteries, which are connected in series and parallel within the frame to form a
module. The modules are then stacked and combined to form a battery rack.
Battery racks can be connected in series or parallel to achieve the voltage and
current required by the battery energy storage system.
Battery pack design and configuration needs to take into account key
parameters such as energy, power, cycle life and cost in order to ensure safety,
reliability and cost performance.
In the energy storage System, BMS (Battery Management System) measures the
basic parameters of the battery, including voltage, current, temperature, etc.
At the same time, it controls the voltage and current of the battery according
to the control strategy in the system, and makes different adjustment strategies
according to the temperature of the battery. Prevent overcharge and
overdischarge of the battery, and extend the service life of the battery.
In addition to monitoring the basic information of the battery, BMS also
needs to calculate and analyze the SOC (battery remaining capacity) and SOH
(battery health status) of the battery according to the collected information of
the battery and the algorithm of the system to evaluate the remaining power,
service life and remaining service life prediction of the current system. Timely
manage abnormal batteries (disconnect, current limiting, etc.) and report them
to the system to ensure battery safety and reliability.
In the field of industrial and commercial energy storage, BMS can not only
ensure the stable operation of equipment, but also provide additional power
during peak power demand, helping enterprises save costs.
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