T
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36
TC
Titanium Carbon Lithium
Rechargeable Battery
Never swallow.
Always keep the battery out of the reach of infants and young
children to prevent it from being swallowed. If swallowed, consult a
physician immediately.
Do not replace.
Depending on the battery manufacturer, there might be major
differences in performance even among the same types or models of
batteries. If you are an equipment manufacturer and need to replace
the battery, please use a new one of the same type and same model
as the existing one. Because this is a rechargeable battery, its
characteristics are completely different from a primary battery even
though their shapes are alike. If a primary battery is installed in the
circuit in place of a rechargeable battery, gas could be generated or
the primary battery could be short-circuited by charging. This could
lead to distortion, leakage, overheating, explosion, or fire. Please
design your equipment so that the end user cannot replace the
battery by mistake.
Never use two or more batteries connected in series or in
parallel.
If batteries are connected together, it is very difficult to design a
circuit to observe whether or not the batteries are charged at
specified voltage or current as described in "Warning -Circuit
Design".
Never reverse the positive and negative terminals when
mounting.
Improper mounting of the battery could lead to equipment trouble or
short-circuiting. This could cause distortion, leakage, overheating,
explosion, or fire.
Never short-circuit the battery.
Do not allow the positive and negative terminals to short-circuit.
Never carry or store the battery with metal objects such as a
necklace or a hairpin. Do not take multiple batteries out of the
package and pile or mix them when storing. Please be careful when
installing the battery not to short-circuit it with metal portions of the
equipment. Otherwise this could lead to distortion, leakage,
overheating, explosion, or fire.
Never heat.
Heating the battery to more than 100 deg. C could increase the
internal pressure, causing distortion, leakage, overheating,
explosion, or fire.
Never expose to open flames.
Exposing to flames could cause the battery to catch on fire and
explode.
Never disassemble the battery.
Do not disassemble the battery, because the separator or gasket
could be damaged, leading to distortion, leakage, overheating,
explosion, or fire.
Never weld the terminals or weld a wire to the body of the
battery directly.
The heat of welding or soldering could cause the lithium to melt, or
cause damage to the insulating material in the battery, leading to
possible distortion, leakage, overheating, explosion, or fire. When
soldering the battery directly to equipment, solder only the tabs or
leads. Even then, the temperature of the soldering iron must be
below 350 deg. C and the soldering time less than 5 seconds. Do
not use a soldering bath, because the circuit board with battery
attached could stop moving or the battery could drop into the bath.
Moreover do not use excessive solder, because the solder could
flow to unwanted portions of the board, leading to a short-circuit or
charging of the battery.
Never allow liquid leaking from the battery to get in your eyes
or mouth.
Because this liquid could cause serious damage, if it does come in
contact with your eyes, flush them immediately with plenty of water
and consult a physician. Likewise, if the liquid gets in your mouth,
rinse immediately with plenty of water and consult a physician.
Keep leaking batteries away from fire.
If leakage is suspected or you detect a strong odor, keep the battery
away from fire, because the leaked liquid could catch on fire.
Never touch the battery electrodes.
Do not allow the battery electrodes to come in contact with your skin
or fingers. Otherwise, the moisture from your skin could cause a
discharge of the battery, which could produce certain chemical
substances causing you to receive a chemical burns.
Safety Instructions
This battery contains organic solvents, and other combustible materials. For this reason, improper handling of the battery could lead to distortion,
leakage*, overheating, explosion, or fire, causing bodily injury or equipment trouble. Please observe the following instructions to prevent accidents.
(* Leakage is defined as the unintentional escape of a liquid from a battery.)
TITANIUM CARBON LITHIUM
RECHARGEABLE BATTERY
Secondary Battery
Warnings — Handling
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Table 1 Nominal Charge Current by Model
Fig. 1 Charge Property
Never set the charge voltage above 3.15V.
Charging at a higher voltage could cause the generation of gas,
internal short-circuiting, or other malfunctions, leading to distortion,
leakage, overheating, explosion, or fire. For details, see the
recommended circuits below.
Always charge at the nominal currents shown below.
Large surges of current could degrade the battery’s characteristics,
leading to distortion, leakage, overheating, explosion, or fire. To
avoid excessive current at the initiation of charging, make sure to
attach a protective resistor for current control. See the
recommended circuits below.
Recommended circuits
Please refer to the representative basic circuits shown below. If you
have any questions about circuit design, please feel free to contact
Maxell.
(How to select a protective resistor for the current control)
The maximum charge
current flows in the battery
when charged at an end
voltage of 1.0V. Therefore
the value of the resistor is
calculated using this equation:
(R)
>
=
((Charge voltage*) –1) / (Nominal Charge Current)
*
Charge voltage (A): Voltage of main power source
(B): Output voltage of regulator
For example, the S-812C series, which has a maximum input voltage
of 18V, or the S-817 series with a maximum input voltage of 10V
(Seiko Instruments Inc.) can be used as a voltage regulator.
Never over-discharge the battery.
If the battery is over-discharged to below the specified voltage (0.5V),
it may not be rechargeable.
2.5V
>300 ohm
1.8V
>160 ohm
Model
TC920S
Charge voltage*
Table 2 Example of resistor
(A) Main power source of 1.6 to 3.15V (B) Other main power source
D: Diode; R: Resistor
(1.6 to 3.15V)
TC
R
D
–
+
Load
Load
TC
R
D
–
+
GND
(1.6 to 3.15V)
D: Diode; R: Resistor
Voltage
Regulator
1.6 to 3.15V
To 16V
Model
Charge Current
TC920S
5mA or lower
The battery may be
regulated by national or
local regulation. Please
follow the instructions of
proper regulation. As
electric capacity is left in a
discarded battery and it
comes into contact with
other metals, it could lead
to distortion, leakage,
overheating, or explosion,
so make sure to cover the (+) and (–) terminals with friction tape or
some other insulator before disposal.
(Example of
battery insulation)
Battery
+
–
Tape
Do not pile up or mix
batteries.
Enlarged view
Electric current flows.
These batteries generate heat.
Use within the rated temperature range (–20 to 60 deg. C).
Otherwise the battery’s charge and discharge characteristics may be
reduced.
Never expose the battery to ultrasonic sound.
Exposing the battery to ultrasonic sound may cause short-circuiting
because the inside material is broken into pieces, leading to
distortion, leakage, overheating, explosion, or fire.
Never subject the battery to severe shock.
Dropping, throwing or stomping on the battery may cause distortion,
leakage, overheating, explosion, or fire.
Never use or leave the battery in a hot place such as under the
direct rays of the sun or in a car in hot weather.
If you do, this may cause distortion, leakage, overheating, explosion,
or fire.
Never allow the battery to come in contact with water.
If it does, this may cause the battery to rust or lead to distortion,
leakage, overheating, explosion, or fire.
Never store the battery in a hot and humid environment.
Otherwise it may cause battery performance deterioration,
deformation, leakage, overheating, or explosion.
Warnings — Circuit Design
Caution — Handling/Storage
Warnings — Disposal
0
20
40
60
80
100
Charge voltage (V)
Recommended area
1.6V—3.15V
Recoverable ratio (%)
1.5 2.0 2.5 3.0 3.5
Prohibited area
FV=1.0V
TC
Secondary Battery
Approx. 1.5V operating voltage
The operating voltage is about 1 to 1.5V the same as the SR, LR
battery.
Wide range charging voltage
Charging voltage is 1.6 to 3.15V.
Excellent cycle performance
500 charge/discharge cycles is archived.
Wide temperature characteristics
Usable in a wide temperature range of –20 to 60 deg. C.
Excellent overcharge characteristics
An original formulated organic electrolyte is employed to provide
stable discharge characteristics even if charged for 10 years at 3.15V
at 20 deg. C. (under accelerated test conditions conducted by
Maxell)
Superior leakage resistance
Leakage resistance can withstand over 1,200 heat shock cycles
between 60 deg. C and –10 deg. C.
Watches
Camcorders
Digital Still Cameras
*1 Nominal capacity indicates duration until the voltage drops down to 1.0V when discharged at a nominal discharge current at 20 deg. C.
*2 Dimensions and weight are for the battery itself, but may vary depending on terminal specifications and other factors.
• Data and dimensions are just reference values. For further details, please contact your nearest Maxell dealer or distributor.
Model
Nominal Voltage (V)
Nominal Capacity (mAh)
*1
Nominal Discharge Current (µA)
Dimensions
*2
Weight (g)
*2
Diameter (mm)
Height (mm)
Charge/Discharge Cycle
TC 920S
1.5
3.5
500
Operating Temperature Range (deg. C)
–
20 to
+
60
9.5
2.05
0.43
100
Products
Applications
Features
The button-type titanium carbon lithium rechargeable battery is a small rechargeable battery developed as a backup power source for real-time
clocks and SRAM like digital cameras and mobile devices. It provides fully 10 times the capacity of a capacitor of the same size.
The button-type titanium carbon lithium rechargeable battery uses
lithium titanium oxide as the positive material, carbon for negative
material and specially formulated organic electrolyte solution.
Charge/Discharge reactions
Charge
Discharge
LixTiyO
4+LizC6 Lix+TiyO4+Liz-C6
Positive Electrode
Negative Electrode
Negative Can
Gasket
Separator
Positive Can
Overview
Construction
Principle and Reactions
TC
Secondary Battery
Titanium Carbon Lithium Rechargeable Battery