UL 2054-2021 pdf download – Household and Commercial Batteries.
5.7 CAPACITY, 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).
6 General 6.1 Casing and enclosure 6.1.1 The casing of a cell or single cell battery, or the enclosure of a battery pack shall have the strength and rigidity required to resist the possible abuses, that it is exposed to during its intended use, in order to reduce the risk of fire or injury to persons. 6.1.2 The casing of a cell, or single cell battery, or the enclosure of a battery pack shall be rigid enough to prevent flexing that would result in damage to the cells or internal protective components. A tool providing the mechanical advantage of a pliers, hacksaw, or similar tool, shall be the minimum mechanical capability required to open the cell casing or battery pack enclosure. Exception No. 1: This requirement does not apply to a cell or a single cell battery containing electrodes with less than 0.04 g (0.0014 oz) ofactive mass. This requirements does not apply to a lithium ion polymer orlithium polymercell (i.e. pouch type cells) ofa battery pack, which rely upon the battery pack enclosure orend use application formechanical protection. Exception No. 2: This requirement does not apply to incomplete battery packs that rely upon the end use application formechanical protection. Exception No. 3: Single cell battery packs employing cells with rigid casings that comply with all ofthe cell tests of UL 1642 or Table 8.1 as applicable, may rely on the cell casing as part of the rigid enclosure requirement provided that internal connections and pack circuitry are provided with a suitable protection against damage as determined bythe applicable batteryenclosure tests in Sections 23 – 25.