breakdown are readily available for use. This may in fact be the most cost effective and safest way to implement a battery bank for this design. [12] A summary of the pros and cons for each of the battery technologies can be found in Table 3.3.1 and Table 3.3.2. By comparing the advantages and disadvantages of each, it has been determined that the sealed lead acid battery is the proper choice for this design. Its low cost and simple charging algorithm compared to the other battery technologies was the primary reason for this selection. However in all other criteria that matter to this project, the sealed lead acid battery performs well enough for it to not be considered a detriment, such as its durability, maintenance requirements and low energy density. The energy density in particular was of no concern, because the application being considered here is stationary. Table 3.3.1 - Comparison of Technologies Technology Advantages Disadvantages Nickel Cadmium Low cost per cycle. Memory effect Simple to charge. pronounced Resistant to stress. High self-discharge rate Toxic Nickel High energy density Complex charging Hydride Low Cost algorithm Less memory effect Deep cycle degradation Table 3.3.2 - Comparison of Battery Technologies cont’d Technology Advantages Disadvantages Lithium Ion Highest energy Very complex to charge density Potentially failure Versatile shapes Extremely Expensive Lithium Polymer Very high energy very expensive density Complex to charge Less prone to failure Sealed Lead Very low cost Low energy density Acid No maintenance Potential thermal Simplest to charge runaway
breakdown are readily available for use. This may in fact be the most cost effective and safest way to implement a battery bank for this design. [12] A summary of the pros and cons for each of the battery technologies can be found in Table 3.3.1 and Table 3.3.2. By comparing the advantages and disadvantages of each, it has been determined that the sealed lead acid battery is the proper choice for this design. Its low cost and simple charging algorithm compared to the other battery technologies was the primary reason for this selection. However in all other criteria that matter to this project, the sealed lead acid battery performs well enough for it to not be considered a detriment, such as its durability, maintenance requirements and low energy density. The energy density in particular was of no concern, because the application being considered here is stationary. Table 3.3.1 - Comparison of Technologies Technology Advantages Disadvantages Nickel Cadmium Low cost per cycle. Simple to charge. Resistant to stress. Memory effect pronounced High self-discharge rate Toxic Nickel Hydride High energy density Low Cost Less memory effect Complex charging algorithm Deep cycle degradation Table 3.3.2 - Comparison of Battery Technologies cont’d Technology Advantages Disadvantages Lithium Ion Highest energy density Versatile shapes Very complex to charge Potentially failure Extremely Expensive Lithium Polymer Very high energy density Less prone to failure very expensive Complex to charge Sealed Lead Acid Very low cost No maintenance Simplest to charge Low energy density Potential thermal runaway
EEL4915_Final_Paper.docx