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RS02109/0814/CD 

22 

www.cdtechno.com 

 

Liberty DCS cells are specifically designed for cycle service and while their robust design allows them to be 
used in numerous types of cycle applications from mild shallow DoD service to continuous PSoC service, 

battery service life can be maximized by following recommended cycle charge voltages and currents as shown 
in Table 1 (Section 7.1).  In addition, following recommended equalization charging procedures, temperature 
compensation guidelines and maintaining accurate SoC and DoD limitations will ensure the Liberty DCS cells 

provide long and reliable cycle service. 

 

CAUTION: 

RECHARGE BATTERIES AS SOON AS POSSIBLE AFTER 

AN EMERGENCY DISCHARGE. Failure to recharge batteries 

immediately after emergency discharge may lead to sulfation,  

or in the case of deep discharge, a complete battery failure 

due to hydration. If recharging at freshening/equalize voltage 

is impractical, promptly recharge at float voltage. 

10.3 Low Float Voltage and Sulfation 

Either because of incorrect charger voltage adjustment, excessive intermittent or static loads paralleling 
the charging source, low operating temperature or simply not fully recharged; a battery may not receive 
adequate charging voltage. In some cases, the charger may even be turned off, erroneously or by 
choice. The net result is a battery left in a partially discharged or undercharged condition. The first 
observable signs may be erratic cell voltages. Although not visible to the observer, the plates will 
become sulfated. 

If you suspect sulfated plates, contact the C&D Technical Services Department 1-800-543-8630 or  
(+1) 215-619-2700 for assistance. Sulfated batteries are not fully charged batteries thus have not 
completed the electrochemical reaction of recharge. Accordingly, they will have reduced capability. If 
allowed to remain in a partially charged condition for an extended period of time, sulfated batteries may 
suffer irreversible damage, requiring replacement. 

10.4 Hydration 

A battery that has been severely over-discharged and left in a discharged condition without immediate 
recharge is subject to damage known as hydration. This is a phenomenon in which the electrolyte specific 
gravity has been reduced to a value so low it permits the lead components to dissolve into the 
electrolyte. 

The reaction of dissolution forms many compounds and salts, generically referred to as hydrate.  
On recharge these compounds react to clog separator pores and form metallic lead. As time passes 

thousands of short circuit paths are created in the separators placed between the positive and negative plates 
to provide electrical insulation. Very often, the effect of these short circuits goes unnoticed except for a 
slight increase in charging current. As the reaction continues, however, short circuits become so extensive it is 

almost impossible to keep the cells charged. Finally, the cells experience total failure. Liberty 2V batteries 
are more resistant to hydration than typical wet cells, largely because of the thick absorbent glass mat 
separator between the plates. However, in severe cases of hydration, internal short circuits can form.

Содержание Liberty MSE

Страница 1: ...RS02109 0814 CD 1 www cdtechno com MSE DCS...

Страница 2: ...is the responsibility of the customer to provide adequate ventilation so hydrogen gas accumulation in the battery area does not exceed two percent by volume However normal air circulation in a ventila...

Страница 3: ...s and Supplies 8 Part 4 Receiving 8 4 1 Inspection at Time of Delivery 8 4 2 Damage and Shortage Situations 8 Part 5 Storage 9 5 1 Storage Conditions 9 5 2 Storage Temperature and Duration 9 Part 6 In...

Страница 4: ...es 19 Part 9 Maintenance 20 9 1 Monthly Inspection 20 9 2 Quarterly 20 9 3 Semi Annually 20 9 5 Performance Tests 21 Part 10 Battery Degradation 21 10 1 General Information and Precautions 21 10 2 Flo...

Страница 5: ...essible from the front of the system assembly These cells are not designed for operation in any other orientation The Liberty MSE series is designed for float operation with minimal cycling Typical ap...

Страница 6: ...vices and First Aid 29CFR1 910 268 g Telecommunications 29CFR1910 305 j Wiring Methods Components and Equipment STD 1 8 2 e OSHA Standing Directive The following references to IEEE documents contain r...

Страница 7: ...jar or cover Failure to follow this warning may result in damage to the container and will void the warranty As a notice to all technicians and personnel in the near proximity of the batteries a BCI w...

Страница 8: ...acid stains are present make a notation on the delivery receipt before you accept the shipment delivery NOTE Freight Carriers generally require that the carriers representative inspect concealed damag...

Страница 9: ...battery and can cause potentially hazardous leakage Higher than normal storage temperature 77 F 25 C nominal will accelerate internal self discharge of a cell by a factor of two for each 15 F 10 C ov...

Страница 10: ...ction equipment 2 Allow a minimum of 4 00 between systems side to side where no side termination is being used Reference supplied C D connection diagram for additional details 3 Allow a minimum of 6 0...

Страница 11: ...ngs for reference which is supplied with every shipment The Liberty 2V floor mounting base has provisions for floor anchoring Consult the applicable building codes and regulations for specific require...

Страница 12: ...of the battery and follow the electrical circuit with succeeding numbers on the cell covers 6 8 Interconnection Cell series connection is made from the of one cell to the of the next sequential cell...

Страница 13: ...or corroded connections When checking connections disconnect the battery from the load and the charging equipment and follow all the precautionary measures outlined above and in the general safety ref...

Страница 14: ...charger The recommended method of providing an initial freshening charge section 5 2 and section 7 1 7 2 is to first determine the maximum allowable voltage that may be applied by the connected equipm...

Страница 15: ...t at Table 1 average cell voltage multiplied by the number of cells in the battery string Individual cell float voltages may vary by 0 10 0 05 volts from the average in a single string b Average strin...

Страница 16: ...an If you observe any unusual readings or visual indications consult your C D Technologies Representative and send a copy of your latest maintenance report to your local C D Representative or the tech...

Страница 17: ...system cannot achieve a full charge between discharging cycles or if the system is being utilized in a PSoC operation then additional charging needs to be employed to bring it back to full charge at...

Страница 18: ...ending on how the system is designed the batteries are regularly discharged and regularly re charged In these applications the charging system should be sized so that on the average the battery is ret...

Страница 19: ...the float voltage must be adjusted by 2mV per F or 3 6mV per C Adjust as indicated below Add 2mV 0 002 volts per F or 3 6mV per C below 77 F 25 C Subtract 2mV 0 002 volts per F or 3 6mV per C above 77...

Страница 20: ...er than 50 require further attention such as a load test 5 Measure and record the temperature of the negative terminal on each cell 9 3 Semi Annually including the above 6 Measure and record the indiv...

Страница 21: ...to the load or by way of interfacing electronics such as an uninterruptible power supply UPS system The name stationary implies the battery is usually permanently placed in a given location and not tr...

Страница 22: ...to the observer the plates will become sulfated If you suspect sulfated plates contact the C D Technical Services Department 1 800 543 8630 or 1 215 619 2700 for assistance Sulfated batteries are not...

Страница 23: ...leling valve regulated batteries is necessary the external circuit resistance should be matched for each battery A wide variation in battery circuit resistance can result in unbalanced discharge i e e...

Страница 24: ...protective honeycomb hood cardboard packaging and shrink wrap See Figure A1 Carefully remove all shipping materials and dispose of properly Once all shipping materials are removed unbolt the system f...

Страница 25: ...e base assembly into position and mark the anchor locations using the base as a template See Figure A6 A7 2 Six 13 16 20 6mm holes are provided in the system base for floor anchoring 3 Install floor a...

Страница 26: ...while lifting however once released and in position will return to square See Figure A9 2 Battery Lift Table Again prior to hoisting install only the 4 10mm bolts in the rear flanges Verify module or...

Страница 27: ...ure proper cell orientation Doing so can save time and effort in the future if a module is installed in the incorrect orientation 2 Once the module is in position and bolt holes are in alignment make...

Страница 28: ...the C D layout drawing attach the restraint bar using 4 10mm bolt assemblies See Figure A15 Top Restraint Each system stack will be supplied with one top restraint The top restraint will be installed...

Страница 29: ...ing base 4 Be sure the floor mounting base or assembly is in position and level and then torque the floor anchors If the base is not level use shims to level A level base is particularly important for...

Страница 30: ...with one gallon of water wipe the cover and terminal seal area with a cloth moistened with the neutralizing solution Do not allow the neutralizing solution to enter the cell Rinse with clear water an...

Страница 31: ...www cdtechno com Appendix C MSDS Documentation For the most up to date MSDS information please visit the C D Technologies public website Public Website www cdtechno com MSDS Sheets http cdtechno com...

Страница 32: ...RE05259 This tool shown in Figure D2 is available from your local C D Technologies Representative or directly through C D Customer Service customersvc cdtechno com 8 Prepare for cell removal by movin...

Страница 33: ...er C D Ship Date Positive Posts Date Installed Battery Model Negative Posts Cells X Strings Application Cell Covers Bus Voltage Portable Meter Bus Voltage Equipment Final Presence of Lubricant on cell...

Страница 34: ...TATUS Open Circuit Float Equalize BATTERY BUS VOLTAGE Vdc Vdc Vdc LOCATION Cell Volts 2 000 Serial Connection Resistance Internal Cell Conductance Impedance Resistance Cell Volts 2 000 Serial Connecti...

Страница 35: ...ppendix F Recycling Lead acid batteries are recyclable and C D Technologies currently has a low cost convenient and environmentally safe collection and recycling program Visit the C D Web site at www...

Страница 36: ...RS02109 0814 CD 36 www cdtechno com...

Страница 37: ...RS02109 0814 CD 37 www cdtechno com...

Страница 38: ...xpress or implied with regard to the accuracy or completeness of such information Further because the product s featured herein may be used under conditions beyond its control C D Technologies Inc her...

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