RECHARGEABLE COIN TYPE LITHIUM BATTERIES
Vanadium pentoxide lithium rechargeable batteries (VL series)
This coin type lithium rechargeable battery has a totally
•• Flat high voltage of about 3 V
new composition, employing vanadium pentoxide
A single battery can provide the voltage equivalent
cathode, lithium alloy anode, and non-aqueous solvents
to two or even three nickel cadmium batteries
in the electrolyte solution. With an energy density about
(approx. 1.2 V) and capacitors. Benefits include:
twice that of button type nickel cadmium batteries, this
battery is especially suited for applications such as
•• Several months of continuous backup
memory backup power supply in electronic devices.
VL3032 (nominal capacity l00mAh) is capable of continuous backup for 10,000 hours at a memory
backup load of 10µA (when discharged to 2.5 V).
•• Small self-discharge allows use without rechar-
Memory backup power supplies for OA equipment
ging even after long storage.
(personal computers, facsimiles, etc.), AV equip-
Unlike nickel cadmium batteries which lose consid-
ment (VTRs), and communications equipment (por-
erable capacity in 6 months due to self-discharge,
the vanadium lithium secondary battery's self-
Hybrid systems with solar batteries (solar remote
discharge is very small, i.e., annual rate of approxi-
•• Stable to continuous overcharging and overdis- charging. Vanadium lithium batteries exhibit stable character- istics in continuous overcharging and overdischar- ging to 0V, important in memory backup considera- tions. Electrical characteristics 20°C Continuous Dimensions (Max.) Nominal *1 Model No. capacity voltage (V) Standard Diameter
* 1 Nominal capacity shown above is based on standard drain and cut off voltage down to 2.5 V at 20°C
About 1,000 times at 10% discharge depth to nominal capacity
Constant-voltage charging (Refer to recommended charging circuit)
Lithium Batteries Handbook, Page 49 January 2000 RECHARGEABLE COIN TYPE LITHIUM BATTERIES Load characteristics (VL2020) Temperature characteristics (VL2020) Storage characteristics (without charge) (VL2020) Charge/discharge characteristics vs. discharge depth (VL2020)
Discharge depth (%) as a function of nominal capacity
Withstand voltage characteristics (Overcharge Overdischarge characteristics (VL2020) characteristics) (VL2020) Lithium Batteries Handbook, Page 50 January 2000 BATTERY SELECTOR CHART Current drain as a function of duration
Temp: 20˚C Initial cut off volatage: 2.5V
Lithium Batteries Handbook, Page 51 January 2000 RECOMMENDED CHARGING CIRCUITS
Basic conditions: Fixed-voltage charging
Charging circuits are important. Be sure to refer to
"Precautions in handling "(page 61).
VL 1216,VL1220 approx. 0.5 mA or below VL 2020
(Note: current can be increased when voltage is below 3 V.)
(Use caution in setting the charge voltage.)
Reference: Examples of 5-V charging circuits Standard circuits
For D2, select a diode of small inverse current (IR = 1µA or below / 5 V)
D1, D2 = MA716 (Diode type code) D3 = MA704, MA700
Simple economical circuits
Type VL3032 VL2330 VL2320 VL2020 VL1220 VL1216 VL621
For D2, select a diode of small inverse current (IR = 1µA or below /5 V)
Charging curve: circuits c and d UL recognition conditions When a protective component is shorted or opened,
maximum charge current is regulated to the following
Call Panasonic for answers to specific questions about
Lithium Batteries Handbook, Page 52 January 2000 OTHER CHARGING CIRCUITS 4 For minimizing current leakage due to resistance, etc., In such a case as charging by another battery
For the details, refer to the constant voltage element specifications
5 Zener control 6 LED control
* Select a diode having an inverse current as small as possible. (IR=1µA or below / 5 V)
7 Transistor control 8 Parallel circuit
(Note) Be sure to consult with us regarding the charge circuit to be used.
Lithium Batteries Handbook, Page 53 January 2000 VANADIUM PENTOXIDE LITHIUM RECHARGEABLE BATTERIES (VL SERIES)
Specification Table (Vanadium pentoxide lithium rechargeable batteries with terminals)
P.V.C. Cover Product availability Model No. With P.V.C. Capacity Voltage (V) Standard
• See page 61 for precautions in charging and handling. Recommended charging circuit is shown on page 52.
• Items with terminals other than those listed above are also available. Contact Panasonic for details. Lithium Batteries Handbook, Page 87 December1998 DIMENSIONS (MM) Model No. Dimension (mm) Model No. Dimensions (mm) VL2330/1VC VL2320/1VC VL2020/1VC VL1220/1VC VL2020/1GU7 VL2330/1HF VL2320/1HF VL2020/1HF Lithium Batteries Handbook, Page 88 December1998 DIMENSIONS (MM) - CONTINUED Model No. Dimension (mm) Model No. Dimensions (mm) VL621/F9D VL3032/1F2 (1.5mAh) (100mAh) VL2320/1F2 VL2330/1F3 VL1216/1F5U VL1220/1FC
Distance between the seal outer endand the Sumitube end
VL2330/1S22 VL2330/2S22 Lithium Batteries Handbook, Page 89 December1998
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