Page 110 - Lindens Handbook of Batteries

BATTERY STANDARDIZATION 4.7

TABLE 4.4a Letter(s) Denoting Electrochemical System of Secondary Batteries
ANSI IEC* Negative electrode Electrolyte Positive electrode Nominal voltage (V)
H H Hydrogen absorbing Alkali metal Nickel oxide 1.2
alloy hydroxide
K K Cadmium Alkali metal Nickel oxide 1.2
hydroxide
P PB Lead Sulfuric acid Lead dioxide 2
I IC Carbon Organic Lithium cobalt oxide 3.6
I IN Carbon Organic Lithium nickel oxide 3.6
I IM Carbon Organic Lithium manganese oxide 3.6
*Proposed for portable batteries.

TABLE 4.4b IEC Nomenclature System for Rechargeable Nickel-Metal Hydride Cells and Batteries
System letter Shape Diameter, Height,
Nomenclature* (Table 4.4a) (Table 4.2b) mm mm Terminals Example
HR 15/51 (R6) H R 14.5 50.5 CF A unit round battery of
the H system having
dimensions shown, with
no connecting tabs
*Nomenclature dimensions are shown rounded off. ( ) indicates interchangeable with a primary battery.
Source: IEC 61951-2.

letter the shape, the first number the diameter, and a second number the height. In addition, the let-
ters L, M, and H may be used to classify arbitrarily the rate capability as low, medium, or high. The
last part of the designation is reserved for two letters that indicate various tab terminal arrangements,
such as CF—none, HH—terminal at positive end and positive sidewall, or HB—terminals at positive
and negative ends, as shown in Table 4.4b.

4.5 TERMINALS

Terminals are another aspect of the shape characteristics for cells and batteries. It is obvious that
without standardization of terminals and the other shape variables, a battery may not be available to
match the receptacle facilities provided in the appliance. Some of the variety of terminal arrange-
ments for batteries are listed in Table 4.5.

TABLE 4.5 Terminal Arrangements for Batteries

Cap and base Terminals that have the cylindrical side of the battery insulated from the terminal ends
Cap and case Terminals in which the cylindrical side forms part of the positive end terminal
Screw types Terminals that have a threaded rod and accept either an insulated or a metal nut
Flat contacts Flat metal surfaces used for electrical contact
Springs Terminals that are flat metal strips or spirally wound wire
Plug-in sockets Terminals consisting of a stud (nonresilient) and a socket (resilient)
Wire Single or multistranded wire leads
Spring clips Metal clips that will accept a wire lead
Tabs Metal flat tabs attached to battery terminals