Varta 63094, Technical Handbook

Page: 34 / 45

COINPOWER | 34
Storage of cells
The cells shall be stored within a proper temperature
range as specified in the Data Sheet. The state of charge
shall be 30 % of the nominal capacity; open circuit
voltage OCV about 3.6 V. When stored for a long time,
care has to be taken that the battery voltage does not
drop below the cut-off voltage due to self-discharge
(see 7.3).
Storage of assembled cells in application
The assembled cells in application shall be stored
within a proper temperature range as specified in the
Data Sheet. When stored for a long time, care has to be
taken that the battery voltage in application does not
drop below the cut-off voltage due to self-discharge
(see 7.3).
7.6 Storage
Cell Connection
Soldering or welding of wires or other types of
connectors directly to the cell is strictly prohibited.
A proper cell connection can only be done by the cell
manufacturer itself. If soldering or welding of wires or
other types of connectors directly to the cell will be
done not by the cell manufacturer, all claims regarding
warranty, performance and safety will be omitted.
Ultrasonic Welding of Application Housing
Ultrasonic welding of plastic lid to the plastic casing
can be applied. However, the welding shall be done
avoiding the application of ultrasonic wave power
directly to the cells. Otherwise it may cause serious
damage to the cells.
Prevention of Short-Circuit in Application
Enough insulation layer(s) between wiring and the cells
shall be used to maintain multiple safety protection.
The battery housing shall be designed to prevent short-
circuits while cell is assembled and during usage
of device. This is because short circuits may cause
generation of smoke or fire.
Assembly
Important: Always avoid any possible contact of cell
housing with sharp objects, corners, or points which
could puncture or damage the cell.
Avoid applying mechanical stress (such as tension,
pressure) to cell itself during assembly. Do not remove
or disassemble any component from the original VARTA
supply configuration.
Do not subject cell to higher temperatures than
specified in Data Sheet provided.
Do not subject cell to ultrasonic weld process vibration
or energy.
Avoid accidental short-circuit of cell during assembly
and finishing processes.
7.7 Others issues
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