Alpha Lomain User manual
Alpha Lomain Ni-Cd Pocket Plate Battery
Technical Manual
Effective: July 2009
Alpha Technologies
Power
Alpha Technologies
®
3
745-680-B10-001 Rev. A
member of The Group
TM
Alpha Lomain Ni-Cd Pocket Plate Battery
Technical Manual
745-680-B10-001, Rev. A
Effective Date: July, 2009
Copyright© 2009
Alpha Technologies, Inc.
Contacting Alpha Technologies: www.alpha.com
or
For general product information and customer service (7 AM to 5 PM, Pacic Time), call
1-800-863-3930,
For complete technical support, call
1-800-863-3364
7 AM to 5 PM, Pacic Time or 24/7 emergency support
Alpha shall not be held liable for any damage or injury involving its enclosures, power supplies, generators,
batteries, or other hardware if used or operated in any manner or subject to any condition not consistent with
its intended purpose, or is installed or operated in an unapproved manner, or improperly maintained.
Photographs contained in this manual are for illustrative purposes only. These photographs may not match
your installation.
NOTE:
Operator is cautioned to review the drawings and illustrations contained in this manual before proceeding. If
there are questions regarding the safe operation of this powering system, please contact Alpha Technologies
or your nearest Alpha representative.
NOTE:
NOTE:
745-680-B10-001 Rev. A
4
Table of Contents
Safety Notes.......................................................................................................................... 6
Battery Safety Precautions.................................................................................................... 7
1.0 Introduction................................................................................................................. 9
1.1 Alpha Lomain Theory of Operation ......................................................................11
1.2 Safety terminal ................................................................................................... 14
1.3 Electrode Frame ................................................................................................. 14
1.4 Positive and negative electrode plate ................................................................ 14
1.5 Electrolyte .......................................................................................................... 15
2.0 Battery range and applications ..................................................................................... 16
3.0 Electrochemistry of Ni-Cd batteries .............................................................................. 16
4.0 Operating Features ....................................................................................................... 17
4.1 Capacity.............................................................................................................. 17
4.2 Cell voltage ........................................................................................................ 17
4.3 Internal resistance ............................................................................................. 17
4.4 Impact of temperature on cell performance and available capacity .................. 18
4.5 Impact of temperature on lifetime ...................................................................... 19
4.6 Short-circuit values ............................................................................................ 19
4.7 Open circuit loss ................................................................................................. 19
4.8 Cycling ............................................................................................................... 20
4.9 Topping up interval ............................................................................................. 21
5.0 Sizing the batteries for standby applications ................................................................. 22
5.1 Voltage window................................................................................................... 22
5.2 Load prole......................................................................................................... 22
5.3 Ambient temperature .......................................................................................... 22
5.4 Recharge time and state of charge..................................................................... 22
5.5 Aging................................................................................................................... 22
5.6 Floating effect -Voltage depression .................................................................... 23
5
745-680-B10-001 Rev. A
Table of Contents
6.0 Charging ....................................................................................................................... 24
6.1 Constant voltage charge..................................................................................... 24
6.2 Charge acceptance............................................................................................. 25
6.3 Charge efciency ............................................................................................... 26
6.4 Temperature inuence ........................................................................................ 26
7.0 Commissioning ............................................................................................................. 27
7.1 Commissioning with constant current ................................................................ 27
7.2 Commissioning with constant voltage ................................................................ 27
8.0 Charging in operation ................................................................................................... 28
8.1. Two level charge................................................................................................ 28
8.2. Single level charge ........................................................................................... 28
9.0 Periodic Maintenance.................................................................................................... 28
Figures and Tables
Fig. 1, Design of an Alpha Lomain Ni-Cd pocket plate cell ................................................................. 10
Fig. 2, Detail of plate design .................................................................................................................11
Fig. 3, Battery Vent .............................................................................................................................. 12
Fig. 4, Exploded view, Battery vent ..................................................................................................... 12
Fig. 5, Smaller Capacity Batteries ....................................................................................................... 13
Fig. 6, Larger Capacity Batteries ......................................................................................................... 13
Fig. 7, Terminal cross-section.............................................................................................................. 14
Fig. 8, Electrode Strip .......................................................................................................................... 14
Fig. 9, Strips connected....................................................................................................................... 15
Fig. 10, NiCd vs. Lead-Acid performance as a function of temperature.............................................. 18
Fig. 11, Discharge curve of 45A x 4 KGL225P post-2224h Float Charge @ 50°C.............................. 18
Fig. 12, Battery life at higher temperatures as percentage of +25°C lifetime ...................................... 19
Fig. 13, Cycle life vs. depth of discharge as a percentage of rated capacity (20°C) ........................... 20
Fig. 14, Available 5-hour-capacity of 5 x KGM 140P after 15 hours charging at 1.43 V/pc at 30°C.... 25
Fig. 15, Total Discharge time 4:43h = 94% of nominal capacity.......................................................... 25
Fig. 16, Available 5-hour-capacity of 5 x KGL 665P after 15 hours charging at 1.43 V/pc at 30°C ..... 25
Fig. 17, Total Discharge time 4:15h = 85% of nominal capacity.......................................................... 25
Table of contents
Other Alpha Batteries Pack manuals
