POWER


Coin Power – new innovative rechargeable lithium coin cells from VARTA Microbattery


cycle capability and no swelling due to the mechanical structure.


The first two devices in the range provide a combination of small size and high capacity which is ideal for applications such as the latest Bluetooth headphones, miniaturised medical devices, sensors, instruments and other advanced electronic devices - see below.


VARTA Microbattery’s new Coin Power cells


Until now the battery design of miniature portable devices, such as wireless Bluetooth headsets, has used conventional lithium-ion or polymer battery technology, which has limitations on size, energy density, discharge capability, swelling and importantly safety. VARTA Microbattery has developed a family of batteries called ‘Coin Power’ which give an increase in energy density yet are smaller and lighter. They have advanced safety and


Part no (V) CP1254 3.7 CP1654 3.7


Voltage Capacity Diameter Height Weight (mAh)


50 100


(mm) (mm) (g) 12.1 16.1


5.4 5.4


1.6 3.2


In devices such as headsets, the basic design constraint on the battery is the requirement to provide an energy capacity of around 50mAh while being small and light enough to be worn in or near the ear. Coin Power technology can meet such constraints.


The cells feature a new coiled-electrode construction which makes far more efficient use


of the space inside the casing.


These cells provide up to 30% increase in Energy Density and can deliver 1000 cycles, compared to 300-500 cycles from comparable products. At the same time, the metal case eliminates the risk of swelling, which is common amongst Li-Pol cells.


Coin Power cells require only a standard circuit protection IC, available at very low cost and CC/CV circuitry is required for charging, reference designs are available. VARTA Microbattery received the Top 100 Award for Innovation in 2011 for their rechargeable Lithium-Ion Coin Power Cells. For more information contact avnet-abacus.eu/varta


5 Keys to Succesful Products Using EnerChip Solid State Batteries


#1 - Never Change a Battery in Your Product Cymbet EnerChip™ rechargeable Solid State Batteries are designed to last the life of your product. EnerChip devices are completely different from legacy batteries and super-capacitor technologies. They can be placed anywhere.


EnerChip


CBC3105 in Cell Phone


Power Backup application


EnerChip devices comply to all environmental, safety and disposal standards. EnerChips are completely non-toxic and perfect for medical and patient monitoring products - details on cymbet.com in


Product Information document PS-72-04.


EnerChips ship on Tape and Reel for Surface Mount Assembly and other Integrated Circuit on your product.


#4 - Create Innovative Miniature Integrated Products EnerChip solid state batteries are available as both packaged parts and bare die. EnerChip bare die are attached using standard wire bond or solder bump techniques.


EnerChip bare die rechargeable solid


state battery powers millimeter-scale Intra-Ocular wireless pressure sensor


#5 - Fast Product Design with Free Evaluation Kit


Every week Cymbet awards an EnerChip Evaluation Kit. Choose from: EVAL-05B, EVAL-09 EH, EVAL- 10 Solar, , EVAL-11 RF Induction or EVAL-12 RTC w/Power Backup. Go to www.cymbet.com and click on this box to register >>


For more information contact avnet-abacus.eu/cymbet www.avnet-abacus.eu 4 focus magazine - issue 16


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