Power. New Energy. Solar

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Energy Storage System for BTS

Powerstorm ESS (PSTO) has positioned itself in the telecommunication off-grid market with a creative and innovative energy storage product. With continuous efforts, PSTO has been creating innovative products with cutting-edge technology that is being utilized by valued customers in places that are demographically very challenging. PSTO has been deploying lithium ion battery packs that are modular and expandable to sizes that meet the need for any size telecom tower. PSTO is projected to bring a low CAPEX, low OPEX, low maintenance, longer life (> 15 years) and modular battery solution to its customers. This document is created to share technical details of the battery building block (module).

System Output Power

 

Powerstorm 12.8-20Ah (12.8V, 20AH)

Features of LiFePO4 Battery                                    

Longer cycle life: Offer up to 20 times longer cycle life and five times longer float/calendar life than lead acid battery, helping to minimize replacement cost and reduce total cost of ownership.

Lighter Weight: About 40% of the weight of a comparable lead acid battery. A "drop in" replacement for lead acid batteries

Higher Power: Delivers twice power of lead acid battery, even high discharge rate, while maintaining high energy capacity

Wider Temperature Range: -20°C~60°C

Super Safety: Lithium Iron Phosphate Chemistry eliminates the risk of explosion or combustion due to high impact, over charging or short circuit situation.

Increased Flexibility: Modular design enables deployment of up to four batteries in series and up to eight batteries in parallel.

 

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Contents

Module mentioned in this document is an example with capacity size of 2.4 kWh. There is no restriction in size as long as it’s between 1 kWh to 5 kWh.

  • Description of Individual Module (Building Block) of size 2.2 kWh
    • Benefits
    • Characteristics
    • Mechanical Interface
    • Communication
  • Characteristics of Individual Module of size 2.2 kWh
    • Nominal Characteristics
    • Mechanical Characteristics
    • Electric Characteristics
    • Discharge Current at the Various Backup Times
    • Operating Conditions
  • Battery Management System Functions
  • Basic Feature of Individual Modules
  • Dimensions of Individual Module
  • Danger Warning
  • Cautions
  • Use Case

Battery Management System Functions

  • Basic Feature of Individual Modules
  • Dimensions of Individual Module
  • Danger Warning
  • Cautions
  • Use Case

Description of Individual Module (Building Block) of size 2.4 kWh

Benefits

  • More cabinet fir value generating equipment
  • Less weight for pole mounted sites
  • No active cooling system required
  • Simplified power system (no BFU required
  • High operational reliability
  • Long lifetime
  • Optimal Management 

Characteristics

  • According with ESTI standard, 3U rack mount design
  • Support parallel connection for using with monitor
  • Lifetime more than 10 years at +25C
  • Built in battery control for efficient operation
  • Comprehensive Communication
  • Compatible with standard telecom equipment
  • ROHS Compliance
  • Support parallel connection between batteries

Mechanical Interface

  • ESTI 19 inches, 3U rack mount design
  • Installation on standard telecom equipment racks

Communication

Communication interface (RS485), Battery operating state (current, voltage, temperature etc.)

Characteristics of Individual Module of size 2.2 kWh

1

Drawing

 

2

Configuration

14S20P

3

Dimension (mm) (W x D x H)

482.6 x433 x 96

4

Mass

18.5Kg

5

Independence

35~52 mΩ

6

Total Energy

44Ah/2.21 kWh

7

Rated Energy

35Ah/1.77kWh

8

End of Discharge Voltage

42V

9

Nominal Voltage

50.4V

10

Maximum Voltage

56V

11

Charge Voltage

56V

12

Charge Method

CC-CV

13

Nominal Current

18A

14

Maximum Current

35A

15

Operation Temperature

-20 to 60ºC

16

Storage Temperature

1 Year

3 months

1 month

17

Recommend Max. Charge Current

11A

22A

35A

11A

18

Recommend Max. Discharge Current

35A

11A

Battery Management System Function

  • Current detect at changing and discharging
  • Hardware protection
  • Discharge control
  • Charge control
  • Cell balance
  • Reverse Protection
  • Cell voltage detect
  • Temperature detect
  • Communication
  • Operating state display of system (LED)
  • PACK voltage detect
  • Fault alarm
  • Current limit of charge
  • 4 x Dry contact