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Ultra low
weight lithium ion batteries |
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 Chargers for lithium polymer cells for experimental and engineering work |
 Less than third of a gram! |
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Batteries, Chargers, and Power Supplies, Custom and
off-the-shelf.
PowerStream has been working with a team of engineers in China to develop the lowest weight
lithium ion batteries. We can now offer design engineers batteries of down to a mass of 330 mg. These cells should be useful
for sensor, tags, and ultra-light models.
Though these cells have small capacities--they have about the same
capacity as coin and button cells--they have a wide range of applications. There are microcontrollers that draw less than 1
microamp, such as the TI MSP430 in standby mode, so a 10 mAH battery could run these for 5 months between
charges.
Ultra-lightweight cells can be used for military, sensors, tags, and cards. They can be made in the ultra-thin
or the multilayer technologies.
Weight: These weigh about 330mg as-shipped. By removing the masking tape that
protects the leads and shortening the leads they can be easily be lightened to about 320 mg. It is not recommended to trim down
the flange area because it can severely shorten the life of the cell (or kill it), but if this is done the cells can usually be
brought down lower.
Features:
1. High operating
voltage(3.6V)
2. Energy density is high,
3. No memory effect
4. Self-discharge is less than 10% per month
5.
Charge/discharge cycle characteristics are excellent
6. Safety characteristics are excellent
7. Processing
temperatures for these cells is 100°C for less than 60 seconds, 120°C for less than 20 seconds and 140°C for less
than 5 seconds.
Ultralight-weight Lithium Polymer Cells.
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Examples of batteries that we have made |
Thickness |
Nominal Voltage
(V) |
Rated capacity (mAh) |
Dimensions T x W x H mm |
Weight
(grams) |
1-19 pieces |
20-99 pieces |
100-499 |
| GM300910 |
3 mm |
3.7 |
8 mAH |
3 x 9 x 10 |
0.33 g |
$15.00
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$10. |
$7.94 |
| PGEB201515 |
2 mm |
3.7 V |
10 mAH
(High rate dischage capacity is above 7mAH when discharged
at 80 mA) |
2 x 15 x15 mm |
0.43g-0.5g |
$15.00 each
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$10.00 |
$7.94 |
| GM041215 |
5 mm |
3.7 V |
45 mAH |
4 x 12 x 15 mm |
1.2 g |
$6.15
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$6.15 |
$2.05 |
GM051215
NO LONGER AVAILABLE USE
GM041215with safety board |
5 mm |
3.7 V |
45 mAH |
5 x 12 x 15 mm |
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$8.15 |
$8.15 |
$3.25 |
We have measured 4 samples of the PGEB201515 were taken at random. Preliminary results are as
follows:
| Sample |
Mass |
Mass after lightweighting |
Notes |
| 1 |
0.470 g |
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| 2 |
0.436 g |
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| 3 |
0.442 g |
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| 4 |
0.438 g |
0.424g |
Just took off the masking tape |
These are great
cells. They are designed for low current discharge, but the above curve shows what they do at high current discharge rates, up
to 8C.
Note the following features:
- At 80 mA (about 8C) you still get 78% of the rated capacity, terminating at 3 volts
- At 10 mA (about 1C) you get 11.5 mAH of the rated capacity terminating at 3 volts
- The voltage stays high even at these extreme currents
- Even at 80 mA (8C) there is enough energy for over 40,000 pulses, 100 mSec each.
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PowerStream Technologies: 1163 S. 1680 West. Orem Utah
84058
Phone: 801-764-9060  Fax: 801-764-9061 |
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© Copyright 2000, 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010 Lund
Instrument Engineering, Inc. All rights reserved |
This material is copyrighted original work. It is forbidden to use this information, text, or graphics in full
or in part on another web site without written permission. This prohibition forbids making derivative text using automatic
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Tiny lithium polymer, light weight lithium ion cells, 500 mg lithium polymer battery
cells |
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