AlphaCell SMU-C Series Batteries TM Technical Manual Effective: December 2010
AlphaCell SMU-C Series Batteries Technical Manual TM 745-680-B11-001 Rev. A Effective Date: December, 2010 Copyright © 2010 Alpha Technologies, Inc. member of The GroupTM NOTE: 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.
Table of Contents Safety Notes........................................................................................................................... 6 Battery Safety Notes.............................................................................................................. 7 1.0 2.0 Introduction.................................................................................................................. 8 1.1 Features.......................................................................
Figures Fig. 1-1, Available Capacity vs. Ambient Temperature......................................................... 10 Fig. 2-1, Charge Characteristics Curve................................................................................ 12 Fig. 3-1, Capacity vs. Storage Time..................................................................................... 14 Fig. 4-1, VRLA Battery Regular Maintenance Record..........................................................
Safety Notes Review the drawings and illustrations contained in this manual before proceeding. If there are any questions regarding the safe installation or operation of the system, contact Alpha Technologies or the nearest Alpha representative. Save this document for future reference. To reduce the risk of injury or death, and to ensure the continued safe operation of this product, the following symbols have been placed throughout this manual. Where these symbols appear, use extra care and attention.
Battery Safety Notes WARNING! Lead-acid batteries contain dangerous voltages, currents and corrosive material. Battery installation, maintenance, service and replacement must be performed only by authorized personnel. Chemical Hazards Any gelled or liquid leakage from a valve-regulated lead-acid (VRLA) battery contains dilute sulfuric acid, which is harmful to the skin and eyes. Emissions are electrolytic, and are electrically conductive and corrosive.
1.0 Introduction The SMU-C series of Valve Regulated Lead Acid (VRLA) batteries is designed to meet the needs of modern electronic equipment. The success of the AlphaCell SMU-C series is due to a product design purpose-built for the needs of critical backup requirements, and an industry-leading manufacturing technology which delivers product consistency. Safety, reliability, and long service life in standby applications are the result. 1.
1.2 Typical Electrical and Mechanical Specifications Normal Voltage (V) Rated Capacity C20 (Ah) Rated Power (15min, 1.75V, W) Dimensions L x W x H (in/mm) WT (lb/kg) SMU-C 6-4.5 6 4.5 14.6 2.76 x 1.85 x 4.21 / 70 x 47 x 107 1.8 / .82 SMU-C 6-7 6 8.0 32.4 5.94 x 1.34 x 3.94 / 151 x 34 x 100 3.0 / 1.4 SMU-C 6-12 6 13.2 54.1 5.94 x 1.97 x 3.94 / 151 x 50 x 100 4.2 / 1.9 SMU-C 12-4.5 12 4.5 14.6 3.54 x 2.76 x 4.21 / 90 x 70 x 107 3.7 / 1.7 SMU-C 12-7 12 8.0 32.4 5.94 x 2.
1.0 Introduction, continued 1.3 Operating Conditions Because SMU-C batteries, which are valve regulated and virtually sealed, do not give off perceptible amounts of gas under normal operating conditions, they can be installed in the same environment where people live and work. • • • • 1.
1.0 Introduction, continued 1.5 Temperature and Battery Life High temperatures can harm the battery and reduce its lifespan. Battery life decreases by 50% per 15ºF (~ 9ºC) above the standard operating temperature of 77ºF (25ºC). To minimize battery damage: • • • • • 1.6 Use temperature compensated chargers. Never allow the battery's temperature to exceed +131ºF (+55°C). Make sure operating area is properly ventilated, so heat cannot accumulate. Provide at least 0.
2.0 Charging Procedures NOTE: Take measurements before and after charging and during discharge to help track changes and problems. Use a form (see Section 6.0), to record the results. Wait two hours after charging before taking final measurements in order to allow the electrolyte to cool sufficiently. CAUTION! If the heat generated as a result of charging exceeds the rate at which heat can be transferred out of the battery, thermal runaway can occur and excessive overheating will result.
2.0 Charging Procedures, continued 2.2 Floating Charge A float charge keeps the battery in a fully charged state with a small but constant current to automatically cover capacity loss resultant from self discharge and other discharges. At 25ºC, the proper floating voltage for the C series is 13.68V/block. The temperature compensate coefficient is -32.4mV/ºF/block (-18mV/ºC/block). Ambient Temperature ºF (ºC) Floating Voltage (Vpc) 32 (0) 13.73 41 (5) 13.72 50 (10) 13.71 58 (15) 13.
3.0 Storage All lead acid batteries experience self-discharge while in open circuit storage. This causes circuit voltage and capacity to decrease (see Fig. 3-1). During storage please note: • The self-discharge rate is related to ambient temperature. The lower the temperature, the less the discharge. Batteries should be stored in a clean, ventilated, and dry location with an ambient temperature of 32ºF to 95ºF (0ºC to 35ºC).
4.0 Maintenance 4.1 Recommended Maintenance Tasks In order to prolong battery life, perform regular maintenance and inspections. Monthly Maintenance • Keep the batteries and battery room clean. • Measure and record the ambient temperature of the battery room. • Check for damage and overheating evidence on the terminal, container, and lid. • Measure and record the total voltage and floating current of the battery system.
4.0 Maintenance, continued Type: Place: Test Status: Qty: Total Voltage (V): Room Temperature: Current (A): No. Voltage (V) No. 1 13 2 14 3 15 4 16 5 17 6 18 7 19 8 20 9 21 10 22 11 23 12 24 Voltage (V) Visual check: Fig. 4-1, VRLA Battery Regular Maintenance Record 16 745-680-B11-001, Rev.
5.0 Discharge Specifications 5.1 Discharge Data with Constant Current Amperage values for each battery model as a function of time and voltage @ 77°F/25°C. SMU-C 6-4.5 End voltage 5Min 10Min 15Min 30Min 1h 3h 5h 10h 20h 1.60V 17.6 10.9 8.25 5.03 3.20 1.40 0.86 0.47 0.25 1.67V 16.5 10.4 7.94 4.81 3.16 1.35 0.84 0.46 0.24 1.70V 15.1 10.0 7.75 4.38 3.06 1.26 0.82 0.46 0.24 1.75V 14.8 9.69 7.50 4.16 2.92 1.22 0.80 0.46 0.23 1.80V 13.3 9.25 6.81 3.85 2.
5.1 Discharge Data with Constant Current, continued Amperage values for each battery model as a function of time and voltage @ 77°F/25°C. SMU-C 12-7 End voltage 5Min 10Min 15Min 30Min 1Hr 3Hr 5Hr 10Hr 20Hr 1.60V 39.0 24.3 18.3 11.2 5.69 2.50 1.53 0.83 0.45 1.67V 36.6 23.0 17.6 10.7 5.61 2.40 1.49 0.82 0.43 1.70V 33.5 22.2 17.2 9.71 5.44 2.24 1.46 0.82 0.43 1.75V 32.9 21.5 16.6 9.22 5.18 2.17 1.43 0.82 0.42 1.80V 29.4 20.5 15.1 8.54 4.85 2.08 1.34 0.
5.1 Discharge Data with Constant Current, continued Amperage values for each battery model as a function of time and voltage @ 77°F/25°C. SMU-C 12-26 End voltage 5Min 10Min 15Min 30Min 1Hr 3Hr 5Hr 10Hr 20Hr 1.60V 118 73.5 55.5 33.8 19.9 8.74 5.34 2.91 1.57 1.67V 111 69.7 53.4 32.4 19.6 8.40 5.23 2.88 1.52 1.70V 102 67.2 52.1 29.4 19.0 7.84 5.11 2.87 1.49 1.75V 99.6 65.1 50.4 27.9 18.1 7.58 5.00 2.86 1.45 1.80V 89.1 62.2 45.8 25.9 17.0 7.28 4.70 2.
5.1 Discharge Data with Constant Current, continued Amperage values for each battery model as a function of time and voltage @ 77°F/25°C. SMU-C 12-40 End voltage 5Min 10Min 15Min 30Min 1Hr 3Hr 5Hr 10Hr 20Hr 1.60V 183 114 86.0 52.4 28.4 12.5 7.63 4.15 2.24 1.67V 172 108 82.7 50.1 28.1 12.0 7.47 4.11 2.17 1.70V 158 104 80.8 45.6 27.2 11.2 7.31 4.10 2.13 1.75V 154 101 78.2 43.3 25.9 10.8 7.15 4.08 2.08 1.80V 138 96.4 71.0 40.1 24.3 10.4 6.72 4.00 2.
5.1 Discharge Data with Constant Current, continued Amperage values for each battery model as a function of time and voltage @ 77°F/25°C. SMU-C 12-90 End voltage 5Min 10Min 15Min 30Min 1Hr 3Hr 5Hr 10Hr 20Hr 1.60V 366 228 172 105 65.4 28.7 17.5 9.55 5.16 1.67V 344 216 165 100 64.5 27.6 17.2 9.46 4.98 1.70V 315 208 162 91.2 62.6 25.8 16.8 9.42 4.90 1.75V 309 202 156 86.6 59.6 24.9 16.4 9.39 4.78 1.80V 276 193 142 80.2 55.8 23.9 15.5 9.20 4.65 1.
5.1 Discharge Data with Constant Current, continued Amperage values for each battery model as a function of time and voltage @ 77°F/25°C. SMU-C 12-150 End voltage 5Min 10Min 15Min 30Min 1Hr 3Hr 5Hr 10Hr 20Hr 1.60V 656 408 308 188 109 48.0 29.4 16.0 8.64 1.67V 616 387 296 180 108 46.2 28.7 15.8 8.34 1.70V 564 373 289 163 105 43.1 28.1 15.8 8.21 1.75V 553 361 280 155 99.8 41.7 27.5 15.7 7.99 1.80V 495 345 254 144 93.4 40.0 25.9 15.4 7.78 1.
5.2 Discharge Data with Constant Power Wattage values for each battery model as a function of time and voltage with constant Watts per cell @ 77°F/25°C. SMU-C 6-4.5 End voltage 5Min 10Min 15Min 30Min 1Hr 3Hr 5Hr 10Hr 20Hr 1.60V 30.8 19.8 15.1 9.06 5.77 2.49 1.45 0.94 0.50 1.67V 29.8 19.3 14.9 8.88 5.74 2.41 1.44 0.93 0.49 1.70V 28.0 19.1 14.8 8.31 5.63 2.30 1.43 0.93 0.48 1.75V 28.2 19.0 14.6 8.06 5.53 2.25 1.41 0.92 0.47 1.80V 25.8 18.7 13.6 7.69 5.
5.2 Discharge Data with Constant Power, continued Wattage values for each battery model as a function of time and voltage with constant Watts per cell @ 77°F/25°C SMU-C 12-7 End voltage 5Min 10Min 15Min 30Min 1Hr 3Hr 5Hr 10Hr 20Hr 1.60V 68.4 43.8 33.4 20.1 10.3 4.43 2.58 1.71 0.90 1.67V 66.0 42.7 33.0 19.7 10.2 4.29 2.57 1.70 0.86 1.70V 62.6 42.3 32.7 18.4 10.0 4.10 2.53 1.69 0.85 1.75V 62.2 42.2 32.4 17.9 9.83 4.00 2.51 1.66 0.84 1.80V 57.2 41.5 30.
5.2 Discharge Data with Constant Power, continued Wattage values for each battery model as a function of time and voltage with constant Watts per cell @ 77°F/25°C SMU-C 12-26 End voltage 5Min 10Min 15Min 30Min 1Hr 3Hr 5Hr 10Hr 20Hr 1.60V 207 133 101 60.9 35.9 15.5 9.02 5.97 3.14 1.67V 200 129 100 59.7 35.7 15.0 8.98 5.94 3.02 1.70V 190 128 99.2 55.9 35.0 14.3 8.87 5.90 2.99 1.75V 188 128 98.3 54.2 34.4 14.0 8.79 5.74 2.91 1.80V 173 126 91.2 51.7 32.
5.2 Discharge Data with Constant Power, continued Wattage values for each battery model as a function of time and voltage with constant Watts per cell @ 77°F/25°C SMU-C 12-40 End voltage 5Min 10Min 15Min 30Min 1Hr 3Hr 5Hr 10Hr 20Hr 1.60V 321 206 157 94.4 51.3 22.1 12.9 8.53 4.48 1.67V 310 201 155 92.5 51.0 21.4 12.8 8.48 4.32 1.70V 294 199 154 86.6 50.0 20.5 12.7 8.43 4.27 1.75V 292 198 152 84.0 49.2 20.0 12.6 8.32 4.16 1.80V 269 195 141 80.1 46.3 19.
5.2 Discharge Data with Constant Power, continued Wattage values for each battery model as a function of time and voltage with constant Watts per cell @ 77°F/25°C SMU-C 12-90 End voltage 5Min 10Min 15Min 30Min 1Hr 3Hr 5Hr 10Hr 20Hr 1.60V 643 412 314 189 118 50.9 29.6 19.6 10.3 1.67V 620 401 310 185 117 49.3 29.5 19.5 9.94 1.70V 588 397 307 173 115 47.1 29.1 19.4 9.81 1.75V 584 396 305 168 113 46.0 28.9 19.1 9.57 1.80V 538 390 283 160 107 44.7 28.
5.2 Discharge Data with Constant Power, continued Wattage values for each battery model as a function of time and voltage with constant Watts per cell @ 77°F/25°C SMU-C 12-150 End voltage 5Min 10Min 15Min 30Min 1Hr 3Hr 5Hr 10Hr 20Hr 1.60V 1151 737 562 338 198 85.2 49.6 32.9 17.2 1.67V 1110 718 555 331 196 82.5 49.4 32.6 16.6 1.70V 1052 711 550 310 193 78.8 48.8 31.6 16.4 1.75V 1045 709 546 301 189 77.0 48.3 31.4 16.0 1.80V 963 698 506 287 178 74.
6.0 Forms 6.1 Discharge Recording Form Model of Battery Date Battery Bank No. Room Temperature Charging Current Total battery Voltage Remarks Cell # Inital Voltage 745-680-B11-001, Rev.
this page intentionally blank
Alpha Technologies Inc. 3767 Alpha Way Bellingham, WA 98226 United States Tel: +1 360 647 2360 Fax: +1 360 671 4936 Alpha Technologies Ltd. 7700 Riverfront Gate Burnaby, BC V5J 5M4 Canada Tel: +1 604 436 5900 Fax: +1 604 436 1233 Toll Free: +1 800 667 8743 Alpha Industrial Power Inc.
