Datasheet EFL700A39 Datasheet (ST)

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EnFilm™ - rechargeable solid state lithium thin film battery

Features

■ All solid-state

■ Ultra thin

■ Fast recharge

■ Long cycle life

■ RoHS compliant

■ UL file number: MH47669

Applications

Device is intended to be used in following applications:

■ Sensors and sensor networks

■ Smart card

■ RF ID tags

■ Energy storage for energy harvesting devices

■ Non implantable medical applications

■ Backup power

Description

The EFL700A39 is a thin film rechargeable lithium battery. The battery has a LiCoO LiPON ceramic electrolyte and a lithium anode. This device has a footprint of 25.4 x 25.4 mm.

cathode,

EFL700A39

Datasheet − preliminary data

EnFilm

EFL700A39 700µAh/3V9

Table 1. Device summary

Symbol Value

Capacity 0.7 mAh

nominal

int

Dimension 25.4 x 25.4 mm

Thickness 200 µm

3.9 V

3.6 to 4.2 V

100 ohm

10 mA

TM: EnFilm is a trademark of STMicroelectronics

April 2012 Doc ID 17370 Rev 2 1/10

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

www.st.com

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Characteristics EFL700A39

1 Characteristics

Table 2. Absolute ratings

Symbol Parameter Value Unit

1. Pulsing conditions: 100 ms on, 0.9 s off

2. 1/100 C discharge at -40 °C: operating at 60 °C reduces the cycle life

3. 1C discharge rate: 50% depth of discharge, cycle at room temperature

Table 3. Electrical characteristics

Operating voltage 3.6 – 4.2 V

Maximum continuous discharge current 5 mA

(2)

(1)

(3)

- 40 to 60 °C

1000 cycle

Maximum pulsed discharge current

Storage temperature range - 40 to 60 °C

stg

Operating temperature range

Cycle life (to minimum of 80% of initial capacity)

lfe

10 mA

Symbol Parameter Test conditions Min Typ Max Unit

T = 30 °C

C Nominal capacity (minimum)

Discharge @ 1 mA

0.7 - - mAh

Cut-off voltage = 3.6 V

Internal resistance T= 30 °C - 100 120 ohm

int

Charge time to 80% of full capacity Constant voltage= 4.2 V - - 20 mn

total self discharge (recoverable and

Room temperature - - 18 %/year

non-recoverable)

Disch

Self discharge

-- 5

% first

year

non-recoverable Room temperature

-- 15

% over

5 years

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EFL700A39 Characteristics

Figure 1. Typical discharge curve Figure 2. Typical pulsed discharge curve

Voltage(V)

4.2

4.1

3.9

3.8

3.7

3.6 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

Discharge capacity(mAh)

Battery tested at 30 °C

70 µA 350 µA

0.7 mA 1mA

1.4 mA

3.5 mA 5 mA

4.5

3.5

2.5

Pulse conditions: 10 mA, 100 msec on 900 msec off, tested at 30 °C

Discharge capacity(mAh)

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

Figure 3. Typical charge curve

Charge capacity (%)

100.0

90.0

80.0

70.0

60.0

50.0

40.0

30.0

20.0

10.0

0.0

10 20 30 40

Charge done at constant voltage of 4.2 V at 30 °C

Charge time (min.)

1.1 1.2

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Application information EFL700A39

2 Application information

This product is not authorized for use in (i) implantable medical devices (devices placed under the skin (devices such as hearing aids are not considered implantable medical devices)), (ii) US government specific (custom) applications or (iii) wafer test devices (“Prohibited Applications”). ST disclaims any liability, including any intellectual property infringement or misappropriation claims, resulting from the use of the product in prohibited applications. Any such use shall be at customer's sole risk and the customer shall defend, indemnify and hold harmless ST from any liability, damage, costs or expense (including attorney fees) resulting from such use. Furthermore, ST shall stop selling the product for use in the Prohibited Applications if customer does not cease using the product in the Prohibited Applications within 15 days of notice until such time as customer has taken precautions reasonably satisfactory to ST to prevent such prohibited use. Customer shall be responsible to ST for any finished goods or work in process in such instance similar to any order cancellation.

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EFL700A39 Recommended charge and discharge processes

3 Recommended charge and discharge processes

3.1 Charge

Battery can be charged from a 4.2 V ± 0.05 V constant voltage source with or without current limit. More than 90% of the total capacity is recharged when the charge current falls below 0.1 mA.

3.2 Discharge

When discharging under constant current or constant load, the cut-off voltage should be no less than 3.6 V. Cut-off voltage can be lowered to 2.0 V for pulsed discharge.

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Ordering information scheme EFL700A39

4 Ordering information scheme

Figure 4. Ordering information scheme

EFL 700 A 39

Energy film µbattery

µbattery capacity

700 = 700 µAh

Package dimensions

A = 25.4 x 25.4 mm, thickness = 200 µm

Nominal voltage

39 = 3.9 V

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EFL700A39 Package information

5 Package information

In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK specifications, grade definitions and product status are available at: www.st.com. ECOPACK

packages, depending on their level of environmental compliance. ECOPACK®

is an ST trademark.

Figure 5. Package dimensions

Battery thickness

Solder contact

A-A

Platinum

Detail

A-A

Solder Contact

distance

Metalization/battery

edge

Table 4. Package dimensions

Dimensions

Ref

Millimeters Inches

Min. Typ. Max. Min. Typ. Max.

A 25.2 25.4 25.7 0.992 1.000 1.012

B 25.4 25.4 25.7 1.000 1.000 1.012

T - 0.16 0.2 - 0.006 0.008

t - 0.07 - - 0.003 -

y 5.3 - 5.9 0.209 - 0.232

g - 0.3 - - 0.012 -

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Recommendations for the soldering process EFL700A39

6 Recommendations for the soldering process

Refer to the STMicroelectronics Application note AN4046, “EnFilm™ micro battery EFL700A39, recommendations for manual assembly on PCB“.

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EFL700A39 Ordering information

7 Ordering information

Table 5. Ordering information

Order code Marking Weight Base qty Delivery mode

EFL700A39 EFL700A39 0.2 g 1 Individual packing

8 Revision history

Table 6. Document revision history

Date Revision Changes

08-Apr-2010 1 Initial release.

23-Apr-2012 2

Insert AN4046 reference for recommendations for the soldering process and update Figure 5.

Doc ID 17370 Rev 2 9/10

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EFL700A39

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