telecom ups battery pack data sheet - jtt electronics · bms manages these conditions safely to...

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every last ion.

Document Number: 000217-A

Telecom UPS Battery Pack

Data Sheet

48 V lithium-ion power supply, 50 amp-hour capacity,

fully integrated BMS, solid state relay protection, onboard current sensor,

event and lifetime data logging, isolated communications.

TELECOM UPS BATTERY PACK

DATA SHEET

Commercial Confidential DN000217-A

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Copyright

Copyright © 2013 JTT Electronics Ltd. (“JTT”) All rights reserved.

Disclaimer

This data sheet is provided in association with, and is subject to, the terms and conditions contained in the “Standard Terms and Conditions of Sale for JTT Electronics Ltd.” for JTT Products. This includes the “Limited Warranty and Remedy”, “Limitations of Liability”, and “Disclaimer and Release” sections of those Standard Terms and Conditions.

The information contained throughout this data sheet is thought to be up to date at the time of publication. JTT will endeavour to maintain this data sheet to reflect the most current information about the purchased products, but has no obligation to do so. JTT reserves the right to change the contents of this data sheet at any time without notice and assumes no liability for its accuracy.

In the preparation of this data sheet, JTT has incorporated and/or compiled service information and maintenance procedures sourced from manufacturers and vendors of parts and components used in the manufacturing of this product. JTT has relied on those manufacturers and vendors for that information and has not verified it. The content of that third party information is not within JTT’s control, and JTT cannot and will not take responsibility for that information. JTT shall not be liable for errors, omissions, missing data or any other matter, in respect of that information.

It is not the intention of this data sheet to instruct personnel in using common sense, basic skills, and rules of, installation, service or repair. The customer is solely responsible for installing the products and for undertaking the installation in a safe environment, using appropriate equipment, by experienced personnel.

Confidentiality

The information contained in this document is the intellectual property of JTT Electronics Ltd. and is Commercially Confidential, subject to the confidentiality provisions of the “Standard Terms and Conditions of Sale for JTT Electronics Ltd.” No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of JTT Electronics Ltd.


DATA SHEET


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Table of Contents

1. FEATURES ................................................................................................................................................... 1

2. DESCRIPTION ............................................................................................................................................ 2

3. APPLICATIONS .......................................................................................................................................... 2

4. OPERATIONS ............................................................................................................................................. 3

5. BLOCK DIAGRAM ..................................................................................................................................... 5

6. TYPICAL APPLICATION ......................................................................................................................... 6

7. PRODUCT CHARACTERISTICS ............................................................................................................ 7

8. OPERATIONAL CURVES ........................................................................................................................ 9

9. SIZE AND MOUNTING ......................................................................................................................... 10

10. CONNECTORS AND PIN OUT ............................................................................................................ 11

11. BMS LINK SOFTWARE ........................................................................................................................ 13


DATA SHEET


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1. FEATURES

Lithium-ion Advantage

Maintenance-free energy storage

Longer run time and shorter recovery time than

lead-acid battery packs

Smaller and lighter than equivalent lead-acid

battery packs

Efficient

Charge and discharge current of up to 50 A

continuous

Manual on/off push button

IAR system (intelligent automatic reconnect)

reduces servicing requirements

Telecom industry standard LED display

Low power dissipation:

o Low power mode preserves energy

when battery is idle

o Ultra-low battery self-discharge for

extended pack shelf life

Cell balancing managed by integrated BMS

Heater or fan controllable by integrated BMS

Safe

Effective T-Series BMS monitoring of all cell

voltages and all 4 cell module temperatures

BMS controlled onboard solid state relay with

integrated short circuit protection

Onboard current sensor with charge and

discharge overcurrent detection

Diagnostics via isolated RS-232 communications

Battery system fault management with

configurable alarm thresholds

Intelligent

ASC technology (adaptive smart connect) allows

greater connectivity than many comparable

battery packs

Automatic low battery power-off for cell

protection

Configurable isolated RS-485 communications

with DIP switch address selection

T-Series BMS calculates:

o State of Charge

o State of Health

o Capacity

o DC resistance

Onboard event and lifetime data logging

Optional comprehensive real-time data

reporting with JTT’s BMS Link software


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2. DESCRIPTION

The JTT Electronics Telecom UPS battery pack is a reliable, intelligent power source for UPS and backup battery systems. This standalone lithium-ion battery pack comes fully equipped with cells specifically chosen for optimum performance in this application. It requires no additional current sensor or external relays, and can be connected in parallel to other JTT Electronics Telecom UPS battery packs. Normal operation consumes very little power for battery pack monitoring, and low power mode uses even less. Battery pack SOC (State of Charge) is indicated by 4 LEDs on the front of the battery pack. The two additional LEDs indicate run and alarm status, respectively. The integrated T-Series BMS controller is designed to connect with a wide variety of equipment loads. By utilizing ASC technology (adaptive smart connect) our BMS ensures safe and reliable connections to both capacitive and resistive dominant loads, handling charger surge and inrush currents safely and intelligently without interfering with short circuit detection. The battery pack is also equipped with reverse protection to prevent equipment damage in the event of miswiring. In extreme operating conditions, the battery pack is designed to disconnect from the system using its solid state relay. This helps ensure safe operation and protects the battery pack. If it becomes safe to do so, the IAR (intelligent automatic reconnect) system will reconnect the pack and resume normal operations.

The BMS balances cell charges to maximize runtime and extend battery pack life. To accomplish this, energy is discharged from the cells with the highest charge in the pack. The BMS also monitors cell and pack conditions, logging alarms and lifetime cell data in its memory. The BMS can communicate battery fault conditions, cell status information, and battery data via the battery pack's diagnostic RS-232 and configurable RS-485. This information can be sent to displays, monitoring systems, or other devices depending on the application. All battery pack information is available at any time via diagnostic RS-232 with our BMS Link software for real-time battery monitoring, data logging, and troubleshooting. The integrated BMS runs over 30 diagnostic checks 10 times per second, monitoring individual cell as well as battery pack conditions. Most of these diagnostics help ensure safe operation of the battery pack, while others monitor battery performance and lifetime.

3. APPLICATIONS

Backup and standby battery systems

Telecom cell sites, FTTx backup power

Load leveling battery systems


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4. OPERATIONS

ONBOARD SOLID STATE RELAY

The onboard solid state relay automatically connects the battery to the system in appropriate conditions and allows up to 50 A continuous charge or discharge current. In the event of unsafe conditions, the integrated BMS will automatically disconnect the battery pack from the system using the internal safety relay. The relay provides integrated short circuit detection with quick response (100 µs). ONBOARD CURRENT MONITORING

This onboard, high-precision and temperature-stable sensor allows accurate SOC (State of Charge) calculations in all operating conditions. The intelligent current sensor monitors for charge and discharge overcurrent events and triggers a disconnection from the system if necessary. LOW POWER MODE

When idle, the battery pack will automatically enter low power mode to reduce power consumption. In this mode the integrated BMS consumes as little as 6 mA from the battery. MANUAL ON/OFF PUSH BUTTON

An on/off push button provides simple, manual control over battery pack run state. AUTOMATIC LOW BATTERY POWER-OFF

In addition to the manual power button, the battery pack will automatically power off if the cells are over-discharged to prevent any permanent performance loss. The battery pack will need to be charged within 3 months of entering this mode to ensure optimum cell performance.

PASSIVE CELL BALANCING

The integrated BMS intelligently balances cells by discharging energy at 50 mA (typical) from the cells with the highest charge levels. A well balanced battery pack will have higher capacity and longer runtime than an unbalanced one. Maintaining an equal charge between cells in a battery pack ensures that cells with slightly weaker performance are not degraded further by over-charging or over-discharging during operation. ASC (ADAPTIVE SMART CONNECT)

Our ASC technology allows the onboard solid state relay to intelligently connect the battery pack to its load or charger by recognizing and adapting to the characteristics of any surge or inrush currents. The BMS manages these conditions safely to ensure reliable pack-to-system connections. IAR (INTELLIGENT AUTOMATIC RECONNECT)

Following a battery pack disconnection, the T-Series BMS will monitor both external and internal conditions. If conditions are suitable, the BMS will reconnect the battery pack to the system and resume normal operations. This IAR system results in greater battery pack availability following a safety disconnect.


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ALARM MONITORING AND REPORTING

Over 30 alarm conditions are evaluated at 10 times per second to ensure safe battery operation, and maximize battery pack performance and lifetime. Alarm thresholds can be customized for the application or operate with default settings. Alarm status is indicated on the LED display panel. Alarm status may be reported in greater detail via RS-485 or RS-232. CELL VOLTAGE MONITORING

Accurate voltage measurement of all cells allows for highly precise SOC calculations. The integrated BMS measures cell voltages every 50 ms with a resolution of 1.5 mV. The high frequency voltage measurements also ensure a fast-response to overvoltage and undervoltage events.

CELL TEMPERATURE MONITORING

Temperature monitoring of each cell module ensures that battery pack safety is always maintained. Over temperature conditions will result in battery pack disconnection. Each of the four cell modules has its own dedicated temperature sensor. CONFIGURABLE COMMUNICATIONS

Isolated RS-485 can be configured as required for any proprietary or standard communications protocol such as ASCII or Modbus. Communications can be to external components such as displays, monitoring devices, and DC chargers. COMPREHENSIVE PC/LAPTOP DIAGNOSTICS

Connecting a PC or laptop with the JTT BMS Link software tool (page 13) to the diagnostic RS-232 allows complete real-time monitoring of the battery pack and access to alarm history and cell lifetime data.


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5. BLOCK DIAGRAM

Figure 1. Block diagram of a JTT Telecom UPS lithium-ion battery pack.


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6. TYPICAL APPLICATION

The JTT Electronics Telecom UPS battery pack is generally used in low voltage UPS, battery backup and load leveling systems. Depending on the specific application the overall system can be configured differently.

The following example shows the battery pack integrated into a system with a 48 V 25 A charger, a monitoring station, and equipment load.

Figure 2. Example system with a JTT Electronics Telecom UPS battery pack connected to a charger, monitoring station, and equipment load.


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7. PRODUCT CHARACTERISTICS

For T-Series BMS communications, power and signal specifications, please see the T-Series BMS data sheet

available on our website.

PARAMETER MIN TYP MAX UNITS

Battery Pack Specifications

Voltage output 42 52.8 60 V

Capacity 50 Ah

Energy 2.6 kWh

Discharge current (continuous) 50 A

Charge current (continuous) 50 A

Volumetric energy density 110 Wh/L

Gravimetric energy density 90 Wh/kg

Physical Characteristics

Width 17-13/32 (442) in (mm)

Height 5-5/32 (131) in (mm)

Length 16-5/32 (410) in (mm)

Weight 64 (29) lb (kg)

Operating Conditions

Discharge temperature range -20 60 °C

Charge temperature range 0 50 °C

Storage temperature range 0 35 °C

Current Sensor Specifications

Measurement range (charge/discharge) -75 90 A

Measurement resolution (low/high current) 1.0 mA

Measurement period 1 ms

Charging overcurrent protection (15 ms) 54 A

Discharging overcurrent protection (5 ms) -54 A

Solid State Relay Specifications

Integrated short circuit protection (100 µs) 60 A

Cell Voltage Monitoring Specifications

Measurement range 0 5 V

Measurement resolution 1.5 mV

Measurement period (active charge/discharge) 50 ms

Measurement period (low power mode) 1000 ms


DATA SHEET


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PARAMETER

MIN

TYP

MAX

UNITS

Cell Temperature Monitoring Specifications

Measurement range -100.0 100.0 °C

Measurement resolution 0.1 °C

Measurement period (active charge/discharge) 500 ms

Measurement period (low power mode) 5000 ms

Cell Balancing Specifications

Passive balancing current 50 60 mA


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8. OPERATIONAL CURVES

Figure 3. Voltage response of the JTT Telecom UPS battery pack during discharge.


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9. SIZE AND MOUNTING

Designed for standard 19-inch rack mounting 3 U height

Figure 4. JTT Telecom UPS battery pack dimensions.


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10. CONNECTORS AND PIN OUT

Figure 5. JTT Telecom UPS battery pack front view.

Connector Harness Plug P/N Wiring Gauge

RS-485 interface

JTT

030538

20-24 AWG

RS-232 interface

JTT

030537

20-24 AWG

NOTE

JTT Electronics battery packs ship with all required connectors. This information is provided in case you need to contact JTT Electronics for replacement parts.


DATA SHEET


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RS-485 Interface

Plug

RS-485-1, RS-485-2

Pin Tag AWG Description

1 B 20-24 Differential B line

2 A 20-24 Differential A line

RS-232 Interface

Plug

RS-232

Pin Tag AWG Description

1 Rx 20-24 Receive line

2 Tx 20-24 Transmit line

3 Gr 20-24 RS-232 ground


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11. BMS LINK SOFTWARE

Monitor and diagnose battery pack problems from your PC or laptop in real-time.

The most comprehensive, battery integrated monitoring, logging and control software.

BMS Link software is available for all JTT products.

Compatible with Windows XP and 7.

Multi-page layout displays battery data in numerical and graphical form.

Cell voltages, temperatures, SOC, SOH, cell DCRs, balancing status, alarm status, battery voltage, battery current, and more available in real-time.

Service Mode available for additional data and troubleshooting.

Controller identification by serial number and firmware version.

Export and save data log files to Excel spreadsheets.

Updates with all cell and battery pack information every 100 ms.

Alarm status information.

telecom ups battery pack data sheet - jtt electronics · bms manages these conditions safely to...

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