| C-Rate (also see Hourly Rate) |
| Discharge or charge current, in amperes, expressed in multiples
of the rated capacity. For example, C/10 discharge current for a battery
rated at 1.5 Ah is: 1.5 AH/I 0 = 150 mA (A cell's capacity is not
the same at all discharge rates and usually increases with decreasing
rate.) |
| |
| Capacity |
| The total number of ampere-hours or watt-hours that can be withdrawn
from a fully charged cell or battery under specified conditions of
discharge. |
| |
| Capacity Retention (or Charge Retention) |
| The fraction of the fall capacity available from a battery under
specified conditions of discharge after it has been stored for a period
of time |
| |
| Carbon/Zinc |
| A primary battery (non-rechargeable) commonly used in low drain
consumer applications (i.e.: clocks, calculators, garage door openers,
etc.). Available in the same sizes as the Alkaline and Manganese Dioxide
(Ħ°AAĦħ Ħ°AAAĦħ etc.) the Carbon/Zinc is one of the most widely used dry
primary batteries because of its low cost and reliable performance.
|
| |
| Cathode |
| The electrode in an electrochemical cell where reduction takes place.
During discharge, the positive electrode of the cell is the cathode.
During charge in a rechargeable battery, the negative electrode is
the cathode. |
| |
| Cell |
| The basic electrochemical unit used to generate or store electrical
energy. |
| |
| Charge |
| The conversion of electrical energy, provided in the form of electrical
current from an external source, to restore the chemical energy in
a cell or battery. |
| |
| Charge Control |
| Technique for effectively terminating the charging of a rechargeable
battery. |
| |
| Condition |
| A process that utilizes a series of heavy discharges and recharges
on a battery to assure optimum performance. |
| |
| Constant Current(CC) |
| A battery discharge regime whereby the current drawn during the
discharge Discharge remains constant. |
| |
| Constant Voltage(CV) |
| A battery discharge regime whereby the current during the discharge
increases as the battery voltage decreases. |
| |
| Current Drain |
| The current withdrawn from a battery during discharge |
| |
| Cutoff Voltage |
| The battery voltage at which the discharge is terminated. The cutoff
voltage is specified by the battery manufacturer and is generally
a function of discharge rate |
| |
| Cycle |
| A sequence where a charged battery is discharged and recharged.
Cycle Life The number of cycles under specified conditions that are
available from a Rechargeable Battery before it fails to meet specified
criteria as to performance. |
| |
| Cylindrical Cell |
| The positive and negative plates are rolled up and placed into a
cylindrical container (as opposed to stacking the plates in a prismatic
cell design). |
