PV chapt. 6

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Anonymous
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PV chapt. 6
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2012-07-17 01:50:59
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Description:
Chapter 6 Vocab Words for Photovoltaic Systems Book
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  1. Capacity
    The measure of the electrical energy storage potential of a cell or battery
  2. Discharging
    The process of a cell or battery converting chemical energy to electrical energy and delivering current
  3. Cutoff Voltage
    Minimum battery voltage specified by the manufacturer that establishes the battery capacity at a specific discharge rate
  4. State of Charge (SOC)
    The percentage of energy remaining in a battery compared to the fully charged capacity
  5. Depth of Discharge (DOD) 
    The percentage of withdrawn energy in a battery compared to the fully charged capacity
  6. Allowable Depth of Discharge
    The maximum percentage of total capacity that is permitted to be withdrawn from a battery
  7. Average Daily Depth of Discharge
    The average percentage of the total capacity that is withdrawn from a battery each day
  8. Autonomy
    The amount of time a fully charged battery system can supply power to system loads without further charging
  9. Self-Discharge
    The gradual reduction in the state of charge of a battery while at steady-state condition
  10. Steady-State
    An open-circuit condition where essentially no electrical or chemical changes are occuring
  11. Cycle
    A battery discharge followed by a charge
  12. Charging
    The process of a cell or battery receiving current and converting the electrical energy into chemical energy
  13. Gassing Voltage 
    The voltage level at which battery gassing begins
  14. Bulk Charging
    Battery charging at a relatively high charge rate that charges the battery up to a regulation voltage, resulting in a state of charge of about 80% to 90%
  15. Absorption Charge
    Battery charging following bulk charging that reduces the charge current to maintain the battery voltage at a regulation voltage for a certain period
  16. Float Charging
    Battery charging at a low charge rate that maintains full battery charge by counteracting self-discharge
  17. Equilizing Charging
    Current-limited battery charging to a voltage higher than the bulk charging voltage, which brings each cell to a full state of charge
  18. Gassing
    The decomposition of water into hydrogen and oxygen gases as a battery charges
  19. Overcharge
    The ratio of applied charge to the resulting increase in battery charge
  20. Specific Gravity
    The ratio of the density of a substance to the density of water
  21. Sulfation
    The growth of lead sulfate crystals on the positive plate of a lead-acid cell
  22. Stratification
    A condition of flooded lead-acid cells in which the specific gravity of the electrolyte is greater at the bottom than at the top
  23. Primary Battery
    A battery that can store and deliver electrical energy but cannot be recharged
  24. Secondary Battery
    A battery that can store and deliver electrical energy and can be charged by passing a current through it in an opposite direction to the discharge current
  25. Traction Battery
    A class of battery designed for repeated deep-discharge cycle service
  26. Starting, Lighting, and Ignition (SLI) Battery
    A class of battery designed primarily for shallow discharge cycle service
  27. Stationary Battery 
    A class of battery designed for occasional deep-discharge limited-cycle service
  28. Battery Bank
    A group of batteries connected together with series and parallel connections to provide a specific voltage and capacity

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