UL 2054-2021 pdf free download.Household and Commercial Batteries.
5.7 CAPACIT RATED — The capacity, in ampere-hours, of a cell or battery determined under specified load, temperature and voltage conditions and declared by the manufacturer.
5.8 CASING — The outer rigid can or flexible pouch of an individual cell or of a single cell standardized (i.e. AA, C. D, etc.) battery that contains the internal components of that cell or single cell standardized battery.
5.9 CELL, COMPONENT — The basic functional electrochemical unit containing an assembly of electrodes, electrolyte, container, terminals, and usually separators, that is a source of electrical energy by direct conversion of chemical energy. May be ready for use or may be provided as component of battery pack.
5.10 CELL OPERATING REGION (lithium ion systems) — The range of voltage, current, and temperature in which the cell operates during charging or discharging as specified by the cell manufacturer.
5.11 COMPONENT, CURRENT-LIMITING — Any component employed to limit current during abnormal conditions. Current-limiting components include resistors, fuses, or PTC thermistor type devices.
5.12 COMPONENT, TEMPERATURE-LIMITING — Any component used to limit temperature during abnormal conditions. Temperature-Limiting Components include thermal protectors and thermal cutoffs.
5.13 CURRENT, ABNORMAL CHARGING — Also called overcharge current for secondary cells; maximum rated charging current to a cell or battery under fault condition.
5.14 DISCHARGE, FORCED — Subsequent discharge of one fully discharged cell in each parallel string by connecting in series with fresh cells of the same kind so as to drive the cell into polarity reversal.
5.15 DISCHARGED, FULLY — A condition of battery energy potential representing depletion of 100 % of its rated capacity (for primary cell or battery) or depletion to its end-point-voltage as specified by the manufacturer (for a secondary cell or battery).
5.16 ENCLOSURE — The outer housing of a battery pack that provides mechanical protection and a level of fire protection for internal cells and components of the battery pack.
5.17 EXPLOSION — A condition that occurs when a cell container or battery case violently opens and major components are forcibly expelled.
5.18 MAXIMUM CHARGING CURRENT AT SPECIFIED TEMPERATURES (lithium ion systems) — The maximum charging current at specified temperatures in the cell operating region. which is specified by the cell manufacturer.
5.19 PORTABLE — Able to be moved or carried by hand.
5.20 UPPER LIMIT CHARGING VOLTAGE AT SPECIFIED TEMPERATURES (lithium ion systems) — The highest charging voltage at specified temperatures in the cell-operating region specified by the cell manufacturer. This value is specified by the cell manufacturer and although it is a maximum limit, it may be lower than the maximum charging voltage parameter specified for the abnormal charging test.
5.21 PROTECTIVE DEVICES — Any device such as a field effect transistor (FET), fuse, diode or current limiter which stops the current flow, blocks the current flow in one direction or limits the current flow in an electrical circuit.UL 2054 pdf download.