Varta 63094, Technical Handbook

Page: 33 / 45

COINPOWER | 33
The cell(s) shall be provided with a PCM which
can protect cell(s) properly, e.g. in case of failing Charge
Control Circuit.
PCM shall have functions of (i) overcharging prevention,
(ii) over-discharging prevention, and (iii) over current
prevention, to maintain safety and prevent significant
deterioration of cell performance. The overcurrent can
occur by external short circuit.
Over-Discharge Prohibition
Over-discharge prevention function shall work to
minimize dissipation current to avoid further drop in cell
voltage below 2.0 V.
It is recommended that the dissipation current of PCM
shall be designed to be minimized to 0.5 microamperes
or less after the over-discharge prevention function
activates in order to minimize effects on shelf life of the
battery.
In case the individual cell voltage falls below 2.0 V PCM
shall have functions to disconnect the cell(s) from
electronic circuit and cell shall not be recharged in
any case.
7.4 Protection Circuit
Module (PCM)
For the batteries approved by UL (File MH13654)
the intended use is at ordinary temperatures
where anticipated high temperature excursions
are not expected to exceed 70 ºC. Nevertheless
under reasonably foreseeable misuse conditions at
temperatures up to 85 ºC over 4 hours no safety
risk occurs.
Technician-Replaceable Appliances
VARTA Lithium-Ion batteries of type CoinPower do not
fulfill the requirements for being User replaceable, as
the reverse polarity installation cannot be prevented.
Therefore the VARTA Lithium Ion batteries of Type
CoinPower can be used only in devices where servicing
of the battery circuit and replacement of the Lithium
battery will be done by a trained technician.
The instruction manual supplied with the end product
shall contain the following warning notice:
• „Replacement of battery has to be done by trained
technician. For replacement only batteries with
(Battery Manufacturer‘s name or endproduct
manufacturer‘s name), Part No. ( ) may be used.
Use of another battery may present a risk of fire
or explosion.“
or
„The battery used in the (End Product Name) must
be replaced at (End product manufacturers) service
center only.“
• „Caution: The battery used in this device may present
a fire or chemical burn hazard if mistreated. Do not
disassemble, heat above 100 ºC (212 ºF) or incinerate."
• „Dispose of used battery properly considering local
laws and rules. Keep away from children – harmful if
swallowed!”
• „WARNING: Risk of Fire, Explosion, and Burns.
Do Not Disassemble, Crush, Heat above 100 ºC (212 ºF),
Short-Circuit or Incinerate."
7.5 Application
COINPOWER | HANDLING PRECAUTIONS AND PROHIBITIONS