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ECET425L Lab 1: SLA BatteriesObjectives:Learn some basic battery terminology Be able to calculate battery run times given the desired DOD or depth of dischargeKnow how batteries can work in series and parallelParts List:12 volt 5Ah SLA batteryPower ResistorSLA-VRLA Documents in Doc Sharing12v 5Ah SLA Spec sheet in Doc SharingG4 LED ArrayIntroduction:Sealed Lead Acid (SLA) batteries or valve regulated lead acid (VRLA) have been used for over forty years. They are one of the most economical batteries to use. They are used in mobility (wheelchairs), backup power (alarm systems) and in many solar applications. The basic principles of batteries can be used for multiple chemistries.Step 1: Battery DefinitionsDefine the following:DOD (Depth of Discharge)CapacityBattery CycleBattery Cycle LifeSOC (State of Charge)Puekert EffectCyclic Battery Applications (wheelchair)Standby Battery Applications (alarm)Step 2: Questions about the SLA Battery Spec Sheet (45565) Note: A 5 amp-hour battery does not mean the battery will output a current of 5 amps for one hour. Standard SLA capacities are measured at C/20 with C being the amp-hour rating of the battery.At what current will the battery have a capacity of 5 amp hours?At a current of 3 amps what is the run time and the capacity?What is the maximum charging current for the battery?What is the maximum charging voltage for the battery?How many cycles can we get at a 100% DOD?How many cycles can we get at a 50% DOD?How many cycles can we get at a 30% DOD?At a temperature of 0 degrees F what is the capacity at C/10 or .1C? Step 3: ProcedureMeasure the battery voltage and from this voltage state the battery capacity. Use the open circuit voltage vs. the residual capacity graph on the second page of the spec sheet.Connect the 30 ohm resistor and the G4 LED lamp across the battery and measure the current through each one.State how long the resistor and the G4 LED would operate at a 100% DOD and a 50% DOD.Step 4: Calculations and Series Parallel ConnectionsA 48VDC, 120VAC 60 hertz inverter would require how many 6 volt batteries in series to operate it?A typical 4000 watt sine wave inverter would require how much current from a 12 volt battery at full output power? Assume 100% efficiency. Remember Power=Voltage*CurrentIf two 12 volt 100 amp-hour batteries are used. What is the voltage and capacity if the batteries are in parallel?What is the voltage and capacity if the batteries are in series?

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# ECET425 Lab 1: SLA Batteries

Question # 00451304
Subject: Engineering
Due on: 12/30/2016
Posted On: 12/28/2016 09:20 AM
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Question
ECET425L Lab 1: SLA Batteries

Objectives:

· Learn some basic battery terminology

· Be able to calculate battery run times given the desired DOD or depth of discharge

· Know how batteries can work in series and parallel

Parts List:

· 12 volt 5Ah SLA battery

· Power Resistor

· SLA-VRLA Documents in Doc Sharing

· 12v 5Ah SLA Spec sheet in Doc Sharing

· G4 LED Array

Introduction:

Sealed Lead Acid (SLA) batteries or valve regulated lead acid (VRLA) have been used for over forty years. They are one of the most economical batteries to use. They are used in mobility (wheelchairs), backup power (alarm systems) and in many solar applications. The basic principles of batteries can be used for multiple chemistries.

Step 1: Battery Definitions

Define the following:

DOD (Depth of Discharge)

Capacity

Battery Cycle

Battery Cycle Life

SOC (State of Charge)

Puekert Effect

Cyclic Battery Applications (wheelchair)

Standby Battery Applications (alarm)

Step 2: Questions about the SLA Battery Spec Sheet (45565)

Note: A 5 amp-hour battery does not mean the battery will output a current of 5 amps for one hour. Standard SLA capacities are measured at C/20 with C being the amp-hour rating of the battery.

1. At what current will the battery have a capacity of 5 amp hours?

2. At a current of 3 amps what is the run time and the capacity?

3. What is the maximum charging current for the battery?

4. What is the maximum charging voltage for the battery?

5. How many cycles can we get at a 100% DOD?

6. How many cycles can we get at a 50% DOD?

7. How many cycles can we get at a 30% DOD?

8. At a temperature of 0 degrees F what is the capacity at C/10 or .1C?

Step 3: Procedure

1. Measure the battery voltage and from this voltage state the battery capacity. Use the open circuit voltage vs. the residual capacity graph on the second page of the spec sheet.

2. Connect the 30 ohm resistor and the G4 LED lamp across the battery and measure the current through each one.

3. State how long the resistor and the G4 LED would operate at a 100% DOD and a 50% DOD.

Step 4: Calculations and Series Parallel Connections

1. A 48VDC, 120VAC 60 hertz inverter would require how many 6 volt batteries in series to operate it?

2. A typical 4000 watt sine wave inverter would require how much current from a 12 volt battery at full output power? Assume 100% efficiency. Remember Power=Voltage*Current

3. If two 12 volt 100 amp-hour batteries are used.

What is the voltage and capacity if the batteries are in parallel?

What is the voltage and capacity if the batteries are in series?

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#### ECET425 Lab 1: SLA Batteries - Tutorial Guide

Tutorial # 00447100
Posted On: 12/28/2016 09:21 AM
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Preview: (in xxxxx by xxx discharge time xxx hours) and xxxxxxxxx with xxxxxxxxxx xxxxxx Battery xxxxx :- A xxxxxxxxxxxxxxxxx the process xx charging x xxxxxxxxxxxxxxxxxxxxxxxxxx discharging xx as required xxxx a load xxx term xx xxxxxxxxx used xx specify a battery's expected xxxxx as the xxxxxx of xxxxxxxxxxxxxx xxxxxxx life xxxx than the xxxx passage of xxxx Battery xxxxx xxxxxx The xxxxxx of discharge-charge xxxxxx thebattery can xxxxxxxxxx before xx xxxxx to xxxx specific performance xxxxxxxx Cycle life xxxxxxxxxxx for xxxxxxxx xxxxxx and xxxxxxxxx conditions The xxxxxx operating life xx thebattery xx xxxxxxxx by xxx rate and xxxxx of cycles xxx by xxxxx xxxxxxxxxx such xxxxxxxxxxxxx and humidity xxx higher the xxxx the xxxxx xxx cycle xxxx SOC (State xx Charge):- An xxxxxxxxxx of xxx xxxxxxx battery xxxxxxxx as apercentage xx maximum capacity xxx is xxxxxxxxx xxxxxxxxxx using xxxxxxx integration todetermine xxx change in xxxxxxx capacity xxxx xxxx Puekert xxxxxxxx The.....
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