Varta 63094, Техническое руководство

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COINPOWER | 44
Cut off voltage
The limiting voltage which terminates
discharge. This voltage generally
corresponds to the lower usable
voltage limit.
Self-discharge
When battery capacity declines without
current flowing to an outside circuit
Energy Density
The amount of energy that can be
extracted per unit battery weight, or per
unit battery volume. Expressed in units
of Wh / kg or Wh / l.
Overcharge
Charging the battery after it has
reached the fully-charged state. If a
battery is overcharged, Lithium metal
is precipitated on the anode surface,
and the battery becomes extremely
chemically unstable.
Overdischarge
Discharging the battery after the
voltage has fallen below the specified
cutoff voltage. If a battery is over
discharged, the anode current collector
copper is dissolved.
COINPOWER | GLOSSARY
Lithium-Ion Charger (CCCV)
Li-Ion batteries commonly require a
constant current, constant voltage
(CCCV) type of charging algorithm. In
other words, a Li-Ion battery should
be charged at a constant set current
level until it reaches its final voltage. At
this point, the charger circuitry should
switch over to constant voltage mode,
and provide the current necessary to
hold the battery at this final voltage
(typically 4.2 V per cell).Thus, the
charger must be capable of providing
stable control loops for maintaining
either current or voltage at a constant
value, depending on the state of the
battery.
PCM
Protection Circuit Module is a device
to protect a battery against risk
of abnormal events such as over-
discharge, overcharge, or short circuit.
PCB
A printed circuit board (PCB)
mechanically supports and electrically
connects electronic components using
conductive tracks, pads and other
features etched from copper sheets
laminated onto a non-conductive
substrate.
THT connection
Through-hole technology, also
spelled „thru-hole“, refers to the
mounting scheme used for electronic
components that involves the use
of leads on the components that are
inserted into holes drilled in printed
circuit boards (PCB) and soldered to
pads on the opposite side either by
manual assembly (hand placement)
or by the use of automated insertion
mount machines
SMD connection
SMD (surface-mount device) is an
electronic device whose components
are placed or mounted onto the surface
of the printed circuit board (PCB). This
method of manufacturing electronic
circuit boards is based on the surface-
mount technology (SMT), which has
largely replaced the through-hole
technology (THT) especially in devices
that need to be small or flat.