battery energy storage systems

The battery energy storage system is a technology that uses batteries as the main energy storage medium, which can store electrical energy and release it when needed.

Battery Energy Storage System Product Parameters

Rated power: 500kW-1000kW

Nominal capacity: 1000-2000kWh

Battery voltage: 500~900V

Discharge: ≤95%DOD(suggestion)

Number of cycles: >5000 times

Cell type: 3.2V/173Ah, 3.2V/280Ah

Rated voltage: AC380/400V

Operating temperature: -20～55℃

Storage temperature: -30～55℃

Altitude: ≤2000m

Heat dissipation mode: Air conditioner

Protection class: IP54

Isolation: Isolation

The following is a detailed introduction to the battery energy storage system:

1. Energy Storage Principle

The battery energy storage system stores electrical energy when there is excess electrical energy (such as peak renewable energy generation or grid off-peak period), and releases electrical energy when demand peaks or power is insufficient, thereby achieving energy space-time transfer and supply-demand balance.

2. System Composition

The battery energy storage system is mainly composed of the following parts:

Battery pack: The battery pack is the core component of the energy storage system. It is composed of multiple battery cells connected in series or in parallel to store electrical energy. Common battery types include lithium-ion batteries, lead-acid batteries, sodium-sulfur batteries, flow batteries, etc. Each battery has its specific application scenarios and performance characteristics.

Inverter: The inverter is a device that converts DC power into AC power. In the battery energy storage system, it is used to convert the stored DC power into AC power to supply the grid or specific loads.

Charge and discharge controller: The charge and discharge controller is responsible for managing the charging and discharging process of the battery pack, monitoring the battery's charge and discharge status, current demand, voltage and temperature and other parameters, and controlling the charging current and charging time as needed to ensure the safety, performance and load demand of the battery pack.

Battery Management System (BMS): The battery management system is the intelligent control center of the energy storage system, responsible for monitoring and managing the status and performance of the battery pack. It includes functions such as battery status monitoring, temperature control, battery balancing, fault diagnosis, etc. to ensure the safe, stable and long-life operation of the battery pack.

DC distribution system: The DC distribution system is used to transmit the DC power stored in the battery pack to the load equipment that needs to be powered, including DC switches, current sensors, protection devices, etc., to ensure the safe and stable transmission of DC power.

Auxiliary equipment: Auxiliary equipment includes temperature sensors, humidity sensors, current sensors, etc., which are used to monitor the system's environmental parameters and power parameters to achieve comprehensive monitoring and management of the system.

III. Application fields

Battery energy storage systems can be applied to multiple fields, including:

Power system energy storage: used to balance the peak and valley power of the power system, improve the stability of the power grid, reduce power grid losses, and reduce energy costs. It can also be used as a backup power source.

Transportation energy storage: Applied in electric vehicles, hybrid vehicles, electric bicycles and other transportation vehicles to improve energy efficiency, reduce vehicle exhaust emissions, and improve urban air quality.

Distributed energy storage: Combined with distributed photovoltaic power generation systems, wind power generation systems, etc., to balance energy supply and demand and improve distributed energy utilization.

Electronic equipment energy storage: As a power source for portable electronic devices, such as smartphones, tablets, laptops, etc., it provides long-term power support.

IV. Battery energy storage system project case

Q1: Are you trading company or manufacturer?

A: We are a professional electric car charger manufacturer and source factory.

Q2: what is the lead time?

A: Usually, 15-20 working days to produce.

Q3: Can we ask you to print our logo into chargers? Can the color of the plug and wire be customized according to our requirements?

A: Yes. We support OEM/ODM production.

Q4: How about your product quality? What should I do if something goes wrong?

A: First of all, we sell our products for many years, and we have a professional engineering team in this field. Moreover, our products have been strictly inspected and repeatedly tested before leaving the factory, and the good and good rate of the varieties has reached 99.98%. Finally, we have service providers in some areas, please contact us for more information

Q5: What is your quality control system?

A: Complete all incoming material inspection, process inspection, and final inspection; 30 test procedures will be done before the goods leave the factory, and charging test videos will be sent; products have CE, ROHS, FCC, UL, KC certification.

Q6: Can I install the EV charger by myself?

A: Yes, but we suggest the user contact a professional electrician for installation to avoid potential safety hazards.

Q7：Why my charging power is lower than the specification?e?

A: Because during the charging session, a few factors will influence the output. Here is some potential reason:

①The BMS(Battery management system) of the car controls the charging session.

②The Max allowed current was set and limited through your APP.

For more details, please query us at sales@hjlcharger.com

Q8: How much time is required to fully charge my car using this charger?

A: The charging speed is determined by three factors working in conjunction: the On Board Charging (OBC) System, the maximum current allowed by the charging cable, and the EVSE. As an illustration, if the EV's maximum allowed power is 30KW and the battery capacity is 60KWh, it would take approximately 2 hours to charge the battery fully.

Q9: What is dynamic load balancing and why do I need that?

A: Dynamic load balancing is a technique that distributes the electrical load across multiple charging stations based on real-time demand. This helps prevent the electrical grid's overload and ensures that each charging station receives appropriate power.

Dynamic load balancing technology can help distribute the available power among multiple EV chargers in real-time, optimizing available power and reducing the risk of overloading the grid. This can help prevent power outages and reduce the need for costly grid upgrades.

Additionally, dynamic load Balancing can help reduce charging times and improve the overall charging experience for EV drivers, making it a valuable feature for both residential and commercial charging applications.