6237101301 - VARTA Microbattery - Datasheet.Directory

Technical Information

SALES PROGRAM AND

TECHNICAL HANDBOOK

Primary Lithium Cells

LiMnO2

Primary Lithium Cells

CONTENT

1. GENERAL INFORMATION 3–8

1.1 Constructions of Lithium Cells 4–5

1.2 Characteristics and Applications 6

1.3 Applications for Primary Lithium Cells 7

1.4 Selection Guide 8

2. CR PRIMARY LITHIUM BUTTON CELLS 9–18

2.1 Types – Technical Data 10

2.2 Assemblies 11–13

2.3 Performance Data 14–18

3. CR HIGH CAPACITY PRIMARY LITHIUM CYLINDRICAL CELLS 19–24

3.1 Types – Technical Data 20

3.2 Assemblies 21

3.3 Performance Data 22–24

4. CR HIGH POWER PRIMARY LITHIUM CYLINDRICAL CELLS 25–30

4.1 Types – Technical Data 26

4.2 Assemblies 26

4.3 Performance Data 27–30

5. GENERAL DESIGN CHARACTERISTICS 31–37

5.1 Safety Tests 33

5.2 Safety Guidelines 34–35

Subject to change without further notice. No responsibility for the correctness of this

information. For latest technical data please refer to our data sheets which you will find

on our website www.varta-microbattery.com.

page 2 | 3

The VARTA Microbattery lithium manganese dioxide

cell chemistry was one of the first solid cathode cells

commercially developed and is still the most widely

used system today. These cells offer an excellent shelf

life, good high-rate and low-rate capability, a wide

operating temperature range and availability in button

and cylindrical cell designs. Potential design-in

applications for these products are electronic, telecom-

munication, metering, instrumentation, office and other

portable equipment use. Based on the outstanding cell

performance and reliability of these products, they have

been able to meet and exceed the requirements of our

customer base worldwide.

1. GENERAL INFORMATION

Advantages for VARTA Microbattery LiMnO2Cells

■High open circuit and load voltage (above 3.0 volts per cell)

■High energy density (400 Wh/kg and 600 Wh/l)

■High capacity and high rate cell construction

■Operation over a wide temperature range

■Flat discharge profile under low to medium

rate applications

■Low self discharge (less than 1% per year at RT)

■Superior shelf life and operational life

(Up to 10 years and more)

■UL Recognition

■Ability to provide a variety of laser welded termination

tabs for all cell types

Energy Density for Primary Systems

FIG. 1

Comparison of different primary battery systems

A = Lithium

B = Silver-oxide

C = Alkaline

D = Zinc-chloride

Primary Lithium Cells

VARTA Microbattery offers a complete range of primary

lithium manganese dioxide cylindrical and button cells

for memory backup and portable applications worldwide.

The cylindrical cell configurations offer the high-capacity

bobbin construction and high-power spirally wound

product. The bobbin construction is targeted at low to

moderate power requirements, dedicated for applications

requiring up to a 10 years operational life at 20°C.

Our spirally wound electrode product offers high-rate

discharge capability, with an operational life in excess

of 5 years.

For compact and light weight equipment use we have

a complete range of high performance primary lithium

button cells.

Lithium Cylindrical Batteries

FIG. 2 – BOBBIN CONSTRUCTION

Schematic construction of a Li/MnO2

cylindrical cell (CR 1/2 AA).

FIG. 3 – SPIRAL CONSTRUCTION

Schematic construction of a Li/MnO2

cylindrical cell (CR 2/3 AH).

Positive Cap

PTC Device

Gasket

Lid

Positive Tab

Anode (Lithium)

Electrolyte + Separator

Cathode (MnO2)

Negative Tab

Negative Can

Insulator Plate

Negative Contact

Gasket

Laser Welding

Lid

Negative Collector

Electrolyte

MnO2Ring

Lithium

Separator

Positive Contact

–

1.1 CONSTRUCTIONS OF LITHIUM CELLS

page 4 | 5

Lithium Button Cells

FIG. 4

Schematic construction of a

Li/MnO2Button Cell

Sealing Technologies

FIG. 5 – CRIMP-SEALING

CR High Power Cylindrical Cells

FIG. 6 – LASER-SEALING

CR High Capacity Cylindrical Cells

Lid (Negative Terminal)

Negative Electrode (Li)

Gasket

Can (Positive Terminal)

Organic Electrolyte + Separator

Positive Electrode (MnO2)

Lid

Negative Contact

Laser Welding

Gasket

Positive Cap

PTC Device

Gasket

Lid

Primary Lithium Cells

1.2 CHARACTERISTICS AND APPLICATIONS

Both mechanical and electrical properties, together

with reliability, ensure that VARTA Microbattery lithium

batteries meet the requirements of modern electronics.

They are therefore ideally suited as power sources for

the long term supply of microelectronic circuitry.

■Long life expectancy and long operational life

■Low self discharge rate

■High energy density

■High cell voltage (3V)

■Wide temperature range

■High operating safety

■High reliability

■Resistance to corrosion with stainless steel case

■No leakage problems with an organic non-corrosive

electrolyte

Main Applications

Main Characteristics

System properties of VARTA Microbattery Lithium Cells

System Li/ MnO2Li/MnO2

Gravimetric energy density 250–300 Wh/kg 250–300 Wh/kg

Nominal voltage 3.0 V 3.0 V

Open circuit voltage 3.2 V 3.2 V

Available capacity range 950–2000 mAh 25– 560 mAh

Storage life >10 years1) >10 years1)

Self discharge d=20 °C <1 % p. a. <1% p.a.

Operating temperature -30 … +75°C2) -20 … +65 °C

Maximum temperature

range (short term)3) -40 … +80°C4) -40 … +80 °C4)

Storage temperature5) -55 … +75°C2) -55…+70°C

Series

CR Series

Cylindrical

Cells

CR Series

Button

Cells

TAB. 1

1) CR 2/3 AH, CR 2, (>5 years)

2) CR 2/3 AH (-20 … +65 °C)

3) max. two weeks

4) μA-range

5) Recommended room temperature

Temperature characteristics

FIG. 7

Temperature characteristics of CR 1/2 AA and CR AA

cylindrical cells

(Load: 5.6 kΩ CR AA, 12 kΩ CR 1/2 AA)

A = -40°C

B = +80°C

C = +60°C

D = -20°C

E = +23°C

page 6 | 7

Telecommunications

Std. Telephone +++

Cordless Telephone +++

Cellular Telephone +

Mobile Radio +++

PABX ++

Utility Meters

Gas Meter ++

Heat Distribution Meter +

Electric Meter +

Water Meter ++

Office Automation

Computer ++

Copy Machine ++

Printer +

Fax +

Vending Machine +

Electronic Typewriter +

Process Control Equipment

Taxi Meter +

Transponder +

Intelligent Tagging +

Electric Parking Meter ++

Data Logger +

Dive Computer +

Consumer Products

Electronic Games +

Watch / Clock ++ +

Calculator +

Compass ++

Car Radio +

Video Recorder +

Automotive

Car lock system +

Dashboard ++

Security +

TAB. 2

Application list

Applications

Main power

source

Memory

backup

Main power

source

Memory

backup

Main power

source

Memory

backup

Button Cells Cylindrical Cells (Spirally wound) Cylindrical Cells (Bobbin construction)

1.3 APPLICATIONS FOR PRIMARY LITHIUM CELLS

Primary Lithium Cells

FIG. 9

STORAGE BEHAVIOR

Typical storage

behaviour

at room

temperature

21°C of

CR 1/2 AA

FIG. 8

CAPACITY RETENTION

Capacity retention

characteristics of

VARTA Microbattery

Lithium Cells

Cylindrical Cells

CR…AA and CR…A

FIG. 10

BATTERY SELECTION

DIAGRAMM

Discharge current/

Operating time

1.4 SELECTION GUIDE

■discharge current and maximum

discharge time

- capacity

■operating temperature range

- self discharge

- surplus capacity requirement

■cell size

To enable battery selection

the following is required:

page 8 | 9

2. CR PRIMARY LITHIUM BUTTON CELLS

Primary Lithium Cells

Type

Order No.

Nominal

voltage (V)

Typical

capacity1)

(mAh)

Standard

load (kΩ)

Max.

discharge

current

(continuous)

(mA)

Max.

discharge

current

(pulse)

(mA)

Weight (g)

CR 1216 CR 1616 CR 2016 CR 2025 CR 2032

CR 1/3 N 6131 101 501 3 170 5.6 20 80 3.0

2 CR 1/3 N (p 28 pxl) 6231 210 501 6 170 13 20 80 8.8

CR 1216 6216 101 501 3 27 39 2 5 0.7

CR 1220 6220 101 501 3 35 39 2 5 0.8

CR 1616 6616 101 501 3 55 39 3 8 1.2

CR 1620 6620 101 501 3 70 20 3 8 1.2

CR 2016 6016 101 501 3 90 15 3 10 1.8

CR 2025 6025 101 501 3 165 10 3 10 2.5

CR 2032 6032 101 501 3 230 5.6 3 10 3.0

CR 2430 6430 101 501 3 280 5.6 3 20 4.0

CR 2450 6450 101 501 3 560 5.6 2 20 6.2

TAB. 3

Technical data, CR Primary Lithium Button Cells

1) Nominal capacity is determined to an end voltage of 2.0 V (type 2 CR 1/3 N: 4.0 V) when the battery is allowed to discharge at standard load level at 20°C

2.1 TYPES – TECHNICAL DATA

CR 2450

page 10 | 11

2.2 ASSEMBLIES

Type

Order No.

Fig. No.

Remarks

CR 1/3 N 6131 101 501 11.6 10.8 0.4 – 7.8 –––––– 11–

CR 1/3 N SLF 6131 201 501 13.0 1.0 10.0 1.0 ±0.3 11.5 ±0.5 12.0 ±0.15 – 1.0 ±0.3 3.0 – – 14 tag 0.25 mm

CR 1/3 N LF 6131 301 501 ––––11.512.0–––19.04.013tag 0.25 mm

180°

2 CR 1/3 N 6231 210 501 13.0 25.1 1.1 0.6 5.5 6.0 ––––– 12–

(p 28 pxl)

3 CR 1/3 N 6331 101 501 12.2 32.2 0.4 – 7.8 –––––– 11–

TAB. 4

Tag material: nickel plated sheet-steel. SLF: tip tinned.

Custom made assemblies are available on request for large volume.

FIG. 13 LF FIG. 14 SLFFIG. 12 FIG. 11

CR 1/3 N

Primary Lithium Cells

CR 1216 6216 101 501 12.5 1.6 0.2 – 10.0 –––––– 15

CR 1220 6220 101 501 12.5 2.0 0.3 – 10.0 –––––– 15

CR 1616 6616 101 501 16.0 1.6 0.2 – 12.0 –––––– 15

CR 1620 6620 101 501 16.0 2.0 0.02 – 12.9 –––––– 15

CR 2016 6016 101 501 20.0 1.6 0.1 –––––––– 15

CR 2016 SLF 6016 201 501 21.3 1.0 10.0 ±0.15 1.0 ±0.3 2.1 ±0.5 20.3 ±0.15 – 1.0 ±0.3 4.5 – – 16 tag 0.25 mm

CR 2016 LF 6016 301 501 20.0 – – – 1.9 20.0 – – – 10.0 4.0 17 tag 0.15 mm

CR 2016 PCB 6016 401 501 20.0 1.0 10.0 9.1 1.6 17.8 7.3 10.0 4.5 11.4 – 18 tag 0.15 mm

CR 2016 SMT 6016 301 012 20.5 3.5 1.8 3.0 2.2 ––––––

CR 2025 6025 101 501 20.0 2.5 0.2 –––––––– 15

CR 2025 SLF 6025 201 501 21.3 1.0 10.0 ±0.2 1.0 ±0.3 3.0 ±0.5 20.3 ±0.15 – 1.0 ±0.3 4.5 – – 16 tag 0.25 mm

CR 2025 LF 6025 301 501 20.0 – – – 2.8 20.3 – – – 10.0 4.0 17 tag 0.15 mm

CR 2025 PCB 6025 401 501 20.0 1.0 10.0 10.0 2.5 17.8 7.3 10.0 4.5 11.4 – 18 tag 0.15 mm

TAB. 5.1

Tag material: nickel plated sheet-steel. SLF: tip tinned.

Custom made assemblies are available on request for large volume.

Type

Order No.

Fig. No.

Remarks

FIG. 16 SLF

FIG. 15 FIG. 17 LF FIG. 18 PCB 3

page 12 | 13

FIG. 19 PCB 2 FIG. 20 WC FIG. 21 SMT

CR 2032 6032 101 501 20.0 3.2 0.02 – 16.5 –––––– 15–

CR 2032 SLF 6032 201 501 21.5 1.0 10.0 1.0 4.2 20.3 – 1.0 4.5 – – 16 tag 0.25 mm

CR 2032 LF 6032 301 501 –––– 3.220.3–––104.017tag 0.15 mm

CR 2032 PCB 3 6032 401 501 20.0 1.0 10.0 11.0 3.2 17.8 7.5 10.0 4.5 11.4 – 18 tag 0.25 mm

CR 2032 PCB 2 6032 701 501 20.0 1.0 – 11.0 3.2 17.8 7.3 10.0 4.5 10.0 – 19 tag 0.20 mm

CR 2032 WC1) 6032 101 013 20.7 – – – 5.5 30.0 – – – 96.0 2.0 20 tag 0.20 mm2)

CR 2032 SMT 6032 301 012 20.0 7.0 2.8 5.0 3.8 –––––– 21–

CR 2430 6430 101 501 24.5 3.0 0.3 – 20.0 –––––– 15–

CR 2430 SLF 6430 201 501 25.8 1.0 10.0 1.0 4.0 25.0 – 1.0 4.5 – – 16 tag 0.25 mm

CR 2430 LF 6430 301 501 –––– 3.225.0–––10.04.017tag 0.15 mm

CR 2430 PCB 3 6430 401 501 24.5 1.0 10.0 11.0 3.0 17.8 7.5 10.0 4.5 11.4 – 18 tag 0.25 mm

CR 2430 PCB 2 6430 701 501 24.5 1.0 – 11.0 3.0 20.0 7.5 10.0 4.5 11.4 – 19 tag 0.20 mm

CR 2430 SMT 6430 301 012 24.5 5.2 4.0 5.0 3.3 –––––– 21–

CR 2450 6450 101 501 24.7 5.0 0.5 – 21.8 –––––– 15–

CR 2450 SLF 6450 201 501 25.8 1.0 10.0 1.0 6.0 25.0 – 1.0 4.5 – – 16 tag 0.25 mm

CR 2450 PCB 3 6450 401 501 24.5 1.0 10.0 13.2 5.0 17.8 7.5 10.0 4.5 11.4 – 18 tag 0.25 mm

CR 2450 PCB 2 6450 701 501 24.7 1.0 – 12.7 5.0 17.8 7.5 10.0 4.5 11.4 – 19 tag 0.20 mm

CR 2450 SMT 6450 301 013 24.5 4.5 2.8 3.5 5.3 –––––– 21–

TAB. 5.2

Tag material: nickel plated sheet-steel. SLF: tip tinned.

1) using Molex 51021-03 connector (Other wire connectors and wire length are available on request.) 2) in shrink sleeve with wire and connector

Custom made assemblies are available on request for large volume.

Type

Order No.

Fig. No.

Remarks

Primary Lithium Cells

2.3 PERFORMANCE DATA

FIG. 24 – CR 1216

Operating voltage vs. current drain

Voltage at 50% discharge

FIG. 25 – CR 1216

Cell capacity vs. discharge current

FIG. 23 – CR 1216

Temperature characteristics

Constant load 39 kΩ

FIG. 22 – CR 1216

Discharge characteristics

at room temperature (21°C)

page 14 | 15

FIG. 28 – CR 2016

Operating voltage vs. current drain

Voltage at 50% discharge

FIG. 29 – CR 2016

Cell capacity vs. discharge current

FIG. 27 – CR 2016

Temperature characteristics

Constant load 15 kΩ

FIG. 26 – CR 2016

Discharge characteristics

at room temperature (21°C)

Primary Lithium Cells

FIG. 32 – CR 2025

Operating voltage vs. current drain

Voltage at 50% discharge

FIG. 33 – CR 2025

Cell capacity vs. discharge current

FIG. 31 – CR 2025

Temperature characteristics

Constant load 10 kΩ

FIG. 30 – CR 2025

Discharge characteristics

at room temperature (21°C)

page 16 | 17

FIG. 36 – CR 2032

Operating voltage vs. current drain

Voltage at 50% discharge

FIG. 37 – CR 2032

Cell capacity vs. discharge current

FIG. 35 – CR 2032

Temperature characteristics

Constant load 5.6 kΩ

FIG. 34 – CR 2032

Discharge characteristics

at room temperature (21°C)

Primary Lithium Cells

FIG. 40 – CR 2430

Discharge curves at different temperatures

Load: cont. R = 15 kΩ

Mean discharge

current at

temperature: d = 0°C ~175 μA

d = -10°C ~170 μA

d = -20°C ~155 μA

FIG. 41 – CR 2450

Load: cont. 5.6 kΩ: Ub

Pulse: 2 s/2 h 100 Ω: Ut

(parallel)

Internal Resistance Ri calculated from

Uband Utat Rt= 100 Ω and Tt= 2s

Temperature: d = 20°C

FIG. 39 – CR 2430

Load: cont. 5.6 kΩ (B)

cont. 15 kΩ (B)

cont. 270 kΩ (A)

Mean discharge I1= 400 μA

current: I2= 180 μA

I3= 10 μA

Temperature: d = 20°C

FIG. 38 – CR 2430

Load: cont. 5.6 kΩ: Ub

Pulse: 2 s/2 h 390 Ω: Ut

(parallel)

Internal Resistance Ri calculated from

Ub and Ut at Rt = 390 Ω and Tt= 2s

Temperature: d = 20°C

page 18 | 19

3. CR HIGH CAPACITY PRIMARY LITHIUM CYLINDRICAL CELLS

Primary Lithium Cells

CR 1/2 AA CR 2/3 AA CR 2/3 A

AFIG .42

FIG. 45

FIG. 43 FIG. 44

AFIG. 46 FIG. 47

CR 1/2 AA 6127 101 301 3 950 mAh– 5.6 kΩ 10 11.5

CR 2/3 AA 6237 101 301 3 1350 mAh–1.0 kΩ 15 15.0

CR AA 6117 101 301 3 2000 mAh –1.0 kΩ 20 21.5

CR 2/3 A 6238 101 301 3 1350 mAh–1.0 kΩ 15 17.0

TAB. 6

Technical data, CR High Capacity Primary Lithium Cylindrical Cells

Type

Order No.

Nominal

voltage (V)

Nominal

capacity at

20°C, down

to 2.0 V,

load (mAh)

Max.

continuous

discharge

current

(mA)

Weight (g)

3.1 TYPES – TECHNICAL DATA

CR AA

page 20 | 21

3.2 ASSEMBLIES

CR 1/2 AA 6127 101 301 14.75 25.2 ––––––––7.00.642

CR 1/2 AA SLF 6127 201 301 14.75 25.2 10.0 1.0 1.0 – 25.4 – 3.0 5.0 – – 43

CR 1/2 AA LF 6127 301 301 14.75 25.2 10.0 – 3.5 2.1 25.4 2.5 ––––44

CR 1/2 AA CD 6127 501 301 14.75 25.4 45.0 –––––––––49

CR 1/2 AA CD 6127 601 301 14.75 25.4 – 7.5 – – 33.5 –––––48(90°)

CR 1/2 AA SLF 6127 701 301 14.75 25.2 – 1.0 1.0 – 25.4 – 3.0 – – – 45 single pin

CR 1/2 AA LF 6127 801 301 14.75 25.2 14.5 – 3.0 – 25.4 –––––47(180°)

CR 1/2 AA SLF 6127 901 301 14.75 25.2 – – 1.0 – 25.4 – 3.0 – – – 46 short pin

CR 1/2 AA TP 6127 601 381 14.75 25.2 16.5 – 0.64 – 25.8 ––––50terminal pin

CR 1/2 AA WC1) 6127 201 390 17.5 27.0 50.0 –––––––––51wire &

connector

CR 2/ 3 AA 6237 101 301 14.75 33.5 ––––––––7.00.642

CR 2/ 3 AA SLF 6237 201 301 14.75 33.5 10.0 1.0 1.0 – 33.7 – 3.0 5.0 – – 43

CR 2/ 3 AA LF 6237 301 301 14.75 33.5 10.0 – 3.5 2.1 33.7 2.5 ––––44

CR 2/ 3 AA CD 6237 501 301 14.75 33.5 45.0 –––––––––49

CR 2/ 3 AA SLF 6237 701 301 14.75 33.5 – 1.0 1.0 – 33.7 – 3.0 – – – 45 single pin

CR 2/ 3 AA SLF 6237 901 301 14.75 33.5 – – 1.0 – 33.7 – 3.0 – – – 46 short pin

CR AA 6117 101 301 14.75 50.0 ––––––––7.00.642

CR AA SLF 6117 201 301 14.75 50.0 10.0 1.0 1.0 – 50.2 – 3.0 5.0 – – 43

CR AA LF 6117 301 301 14.75 50.0 10.0 – 3.5 2.1 50.2 2.5 ––––44

CR AA CD 6117 501 301 14.75 50.2 45.0 – 3.5 –––––––49

CR AA SLF 6117 701 301 14.75 50.0 – 1.0 1.0 – 50.2 – 3.0 – – – 45 single pin

CR AA WC1) 6117 201 390 18 51.0 50.0 –––––––––51wire &

connector

CR 2/ 3 A 6238 101 301 17 33.5 ––––––––7.00.642

CR 2/ 3 A LF 6238 301 301 17 33.5 10.0 – 3.5 2.1 33.7 2.5 ––––44

CR 2/ 3 A CD 6238 501 301 17 33.5 45.0 –––––––––49

TAB. 7

Material: nickel plated sheet-steel, tag thickness: 0.15 mm till 0.25 mm. SLF: tip tinned, all types in green shrink sleeve.

1) using connector: JST type: PHR2 (Other connector types available on request.)

Custom made assemblies are available on request for large volume.

Type

Order No.

A (Max.)

Fig. No.

Tags

CR 2/3 AH 6215 101 501 3 1500 mAh– 200 Ω 1500 16

CR 123 A 6205 210 501 3 1500 mAh –200 Ω/2.0 V 1400 17

CR 2 6206 210 501 3 850 mAh– 200 Ω/1.8 V 885 11

TAB. 8

Technical data, CR High Power Primary Lithium Cylindrical Cells

1) Current value for obtaining 50% capacity 2) in blister card (1 pc)

Type

Order No.

Nominal

voltage

(V)

Nominal

capacity at

20°C, load

(mAh)

Max.

continuous

discharge

current1)

(mA)

Weight (g)

FIG. 70FIG. 68 FIG. 69

4.1 TYPES – TECHNICAL DATA

4.2 ASSEMBLIES

CR 2/3 AH CR 123 A CR 2

page 26 | 27

4.3 PERFORMANCE DATA

FIG. 73 – CR 2/3 AH

Pulse discharge characteristics

1) Load: 0.9 A, 3 sec. on, 27 sec. off

2) After storage at 60°C /100 days

FIG. 74 – CR 2/3 AH

Typical discharge curve

Load: cont. 560 Ω

Pulse load: 2 sec./min 3 Ω

(parallel)

FIG. 72 – CR 2/3 AH

Temperature characteristics

Constant load 5.6 kΩ

FIG. 71 – CR 2/3 AH

Discharge characteristics

at room temperature (21°C)

Primary Lithium Cells

FIG. 77 – CR 123 A

Pulse discharge characteristics

1) Load: 0.9 A, 3 sec. on, 27 sec. off

2) After storage at 60°C /100 days

FIG. 78 – CR 123 A

Typical discharge curve

Load: cont. 560 Ω

Pulse load: 2 sec./min 3 Ω

(parallel)

FIG. 76 – CR 123 A

Temperature characteristics

Constant load 5.6 kΩ

FIG. 75 – CR 123 A

Discharge characteristics

at room temperature (21°C)

page 28 | 29

FIG. 81 – CR 2

Discharge temperature characteristics

FIG. 80 – CR 2

Pulse discharge characteristics

FIG. 79 – CR 2

Discharge characteristics

at room temperature (21°C)

Primary Lithium Cells

page 30 | 31

5. GENERAL DESIGN CHARACTERISTICS

In order to ensure optimum battery performance for the

primary CR Button, the cylindrical CR High Power and

cylindrical High Capacity cells, we suggest consideration

of the following design-in requirements. They are the

nominal and operating voltage, load current and profile,

the duty cycle, temperature requirements and shelf life

for the application. These characteristics for each battery

type must be evaluated against the design requirements

to select the most appropriate product that fulfills these

requirements.

Design-in Considerations

VARTA Microbattery Primary Lithium Batteries offer light-

weight packaged power for a variety of portable electric

and electronic equipment. They are suitable as a main or

standby

power source for memory (RAM) and

Real-Time

clock (RTC) applications.

The Lithium Batteries are blocked from the power

supply by means of a diode to prevent discharge of the

battery into the DC supply during shut down.

The voltage drop across D1 should be taken into account

as the minimum voltage of the load that has to be main-

tained under all circumstances.

Blocking diode D2 and D3 prevents the battery from

being charged through the power supply. The amount of

accumulated reverse current (IR) should be kept around

1% of the cell’s typical capacity during its standby life

time.

A maximum of 5μA continuously must not be exceeded.

In the absence of a DC supply voltage, the lithium

battery supplies the load with the necessary power.

As diodes fail at low current levels by an alloy-effect

causing a severe reduction in impedance, an additional

safety device must be incorporated.

Battery Selection

FIG. 76

FIG. 77

FIG. 78

Using 2 cells when

6 V is used in series

Primary Lithium Cells

UL-Recognition

All VARTA Microbattery Lithium Cells and Batteries

listed in Tab.10 are recognized by Underwriters

Laboratories Inc. under UL-file number MH 13654 (N).

The cells are marked with the Recognized Component

Mark.

Underwriters Laboratories requires for lithium cells/

batteries a circuit, which must contain a protective

component to prevent charging. In case of diode failure

a current limiting resistor must be chosen according to

the values listed

in Tab. 10.

Please also pay attention to the Safety Guidelines on

page 34.

For safety tests of the cells, “UL” requires either an

additional diode, or a resistor, limiting the current to a

safe level of 4 mA (for all cylindrical CR … A(A) lithium

mass cells).

It should be noted that the value of the resistor has to

be calculated using the higher power supply voltage –

not the battery voltage.

The supply voltage to the load can be calculated by the

battery voltage drop across the diode and the resistor.

Printed Circuit Board Mounting

Never solder on the body of the battery directly, use a

battery equipped with PC-mount terminals. When using

automatic soldering apply 250–270°C within 5 seconds.

Make sure that the battery is not suspended or dropped

into the soldering bath.

Do not heat above 80°C to avoid leakage caused by

deterioration in the battery’s performance.

Trademark of Underwriters

Laboratories

CR 1216 3 mA High Capacity

CR 1220 3 mA CR 1/ 2 AA 4 mA

CR 1616 4 mA CR 2/3 AA 4 mA

CR 1620 2.5 mA CR AA 4 mA

CR 2016 4 mA CR 2/3 A 4 mA

CR 2025 5 mA

CR 2032 5 mA High Power

CR 2320 5 mA CR 2/ 3 AH 25 mA

CR 2430 15 mA CR 123 A 10 mA

CR 2450 15 mA CR 2 20 mA

CR 1/3 N 2 mA

TAB. 10

All listed cells/batteries are recognized by UL-recognition.

Type

Max. safe

reverse

current

acc. to UL

Type

Max. safe

reverse

current

acc. to UL

Button Cells Cylindrical Cells

page 32 | 33

For safety aspects please consult Varta Microbattery before performing these extreme tests:

Short Circuit

In table 11 the temperature is listed at short circuit at an

ambient temperature of 20°C, 40°C and 70°C.

Frequency range

5 Hz 55 Hz 500 Hz 55 Hz 5 Hz

Amplitude at frequency range:

5 to 55 Hz: ± 0.75 mm

Acceleration at frequencey range:

55 Hz to 500 Hz: 100 m/s2

Cycle duration: 15 min

Oscillation time of each main axis: 3 h

TAB. 12

Vibration

test

Without changing of

the electrical values

the following Li-cell

can be exposed to

this vibration test:

■ CR 1/2 AA

■ CR 2 /3 AA

■ CR AA

Result

A = –30°C

B = 20°C

C = 75°C

Temperature Characteristics

FIG. 79

CR 1/2 AA, Temperature characteristics

Conditions: 20 h/20°C: 15 kΩ,

4 h/at various temp.: 270 kΩ

Vibration Test

Compression Test

1120 kg

■no significant electrolyte

loss

■no rupturing

In Short Circuit

Condition 24 h,

0.1 Ω

■after 24 h the bottom of

the cell is curved by only

0.1 mm; diameter

unchanged

■no electrolyte creepage

or loss

■no rupturing

Test at 150°C for

2 Hours

■no electrolyte creepage

or loss

■no rupture

■no fire

■no explosion

■open circuit voltage

almost unchanged

at 3.2 V

■the cell base bowed,

causing cell height to

increase by 1 mm,

diameter unchanged

Puncture Test total

Penetration of

the Cell by a Nail

Ø 3mm

■no splashing or

pressurized electrolyte

loss

■no rupturing

20°C 24 °C 28°C 24 °C

40°C 50 °C 50°C 47 °C

70°C 80 °C 84°C 77 °C

TAB. 11

Ambient

temperature

CR 1/2 AA

CR 2/3 AA

CR AA

5.1 SAFETY TESTS

Primary Lithium Cells

5.2 SAFETY GUIDELINES

Pleas see www.varta-microbattery.com/top/trans-safe for latest information about

Transportation, Safety and Recycling Note for Batteries.

page 34 | 35

5.4 APPLICATION CHECK LIST

Customer: Application:

Requested quantity: Batteries per annum:

Type of battery: Primary power source: MBU:

Umax:U

min:U

cutoff:

Imax:I

min:I

average:

Current profile:

Operating temperature: max (°C): min (°C): average (°C):

Temperature profile:

Storage temperature max (°C): min (°C): average (°C):

Storage time: Operating time:

Dimensions:

Remarks:

Primary Batteries

Rechargeable Batteries

Silver Oxide Button Cells Lithium-Manganese Cells

Lithium-Thionyl-Chloride Cells

Lithium Button Cells

Zinc Air Cells

Alkaline Batteries

Li-Polymer NiMH Button Cells

(V...H / HR / HT / HRT)

Cylindrical & Prismatic

Li-Ion & NiMH Cells

Product Portfolio

Contacts

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Tel +1 914 592 25 00

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Distributors Distributors and representations in all major countries worldwide. Please see webpage.

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