Single Cell Assembly; Multicellular Assembly; Soldering - Varta CoinPower CP 1654 A4 Technical Handbook

COINPOWER | BATTERY ASSEMBLY

8.1 Single Cell Assembly

For some applications, a bare cell is not the ideal
solution for connecting the battery to the PCB.
Therefore VARTA Microbattery offers standard cell
configurations with solder tags for THT connection,
wires and many more. If a customized assembly is
required, VARTA can also offer individual battery
assembly including solder tags, wires and insulation
tape. Please contact your Key Account Manager for
more details.
Examples for different battery assemblies
8.2 Multicellular
Assembly
If a larger capacity and / o r higher discharge currents
are required, two or more cells may be connected in
a cell pack. These packs can be assembled in various
shapes, depending on the customer's requirement. The
cells can be also connected in series in order to produce
a higher output voltage. Above are shown examples of
multicellular configurations of the CoinPower cell.

8.3 Soldering

With assembled tags or wires, the CoinPower battery
may be soldered onto a PCB. For this purpose, every tag
supplied by VARTA is tin-plated in order to improve its
solderability. Please consider the following guidance on
the solderability of the CoinPower cell.
Using a Soldering Iron
Do not allow the soldering iron to make direct contact
with the body of the cell. Proceed with soldering
quickly within 3 seconds while maintaining the iron
tip temperature at about 320 ºC, and do not allow the
temperature of the cell body to exceed 60 ºC.
Dip Soldering / W ave Soldering
These two soldering procedures could short circuit the
battery. This will cause irreversible damage to the cell.
This will impair performance dramatically and might
lead to safety risks as well.
Reflow Soldering
NEVER USE REFLOW SOLDERING
During a standard reflow process the temperature on
the body and inside the cell will rise to a level which will
cause irreversible damage to the cell. This will impair
performance dramatically and might lead to safety risks
as well.
There is a risk of explosion / b ursting and electrolyte
leakage during reflow soldering due to excessive
temperatures.
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