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Energy Storage System

PSTO ESS 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).

PSTO 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.

 

SPECIFICATION

Specification:

 

 

Nominal Voltage

12.8V

 

Nominal Capacity

20AH

 

Energy

256Wh

 

Internal Resistance

《50mΩ

 

Cycle life

>2000 cycles at 0.2C 100% DOD

Electrical Characteristics

Months Self Discharge

<3%

 

Efficiency of Charge

100% at 0.5C

 

Efficiency of discharge

96~99% at 1C

 

Charge volt

14.6+/-0.2V

 

Charge Mode

CC at 0.2C to 14.6V, then  at CV14.6V to charge current less than 0.02C

Standard Charge

Charge Current

10A

 

Max. Charge current

20A

 

Charge cut off voltage

15.6V+/-0.2V

 

Continuous Current

40A

Standard Discharge

Max. Pulse Current

50A (<3s)

 

Discharge Cut-off Voltage

8V

 

Charge Temperature

0°C to 45°C (32F to 113F) at 60±25% Relative Humidity

 

Discharge Temperature

– 20°C to 60°C (-4F to 140F) at 60±25% Relative Humidity

Environment

Storage Temperature

0°C to 40°C (32F to 104F) 60±25% Relative Humidity

 

Water Dust Resistance

IP56

 

Cell & method

26650  4S6P

 

Plastic Case

ABS

 

Dimensions (in./mm)

181*77*167mm (7.13″*3.03″*6.57″)

Mechanical

Weight (lbs./kg.)

2.7KG (5.958 lbs)

 

Terminal

T3

 

Protocol (optional)

SMBus /RS485/RS232

 

SOC (optional)

LED