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VARTA Microbattery CoinPower Rechargeable Li-Ion Battery Solution for Wireless Sensor Applications

VARTA Microbattery
VARTA Microbattery CoinPower
Next Generation Rechargeable Battery Solution
for Wireless Sensors and the Internet of Things
VARTA Microbattery CoinPower Rechargeable Li-Ion Battery Solution

VARTA Microbattery has developed innovations in the construction of lithium coin cells, which have increased their energy density to the point where standard coin cells (VARTA Microbattery CoinPower) can now replace custom battery packs. These cells feature a coiled electrode construction, which makes more efficient use of the space inside the casing, while providing a greater surface area of electrode per cubic centimeter than conventional stacked or layered electrode constructions.

VARTA Microbattery has also invented and patented the ILoc casing construction in which precisely engineered upper and lower casings slide together securely, eliminating the requirement for a bulky rim and separate sealing material. This design also enables the cell to operate as a current interruption device when the pressure inside the cell exceeds a certain level – for example, when the cell is charged at an excessive current or voltage – the upper and lower casings separate by a small, controlled amount sufficient to break the circuit and shut down the battery.

While CoinPower’s electrode design plays a crucial part in producing a cell with a high energy density, it is also important to note the supporting electronic circuit is also small. A CoinPower cell requires only a standard circuit protection IC, widely available at low cost from dozens of manufacturers (including the ZSPM4551 from ZMDI and several models from Skyworks including the AAT3681, AAT3681A, AAT3688 and AAT3688A), plus two miniature passives. The footprint of this circuitry can be considerably smaller than the complex PCB generally implemented in custom battery packs.

Device manufacturers can now avoid the cost and risk associated with custom engineered battery packs while achieving high energy capacity in a small footprint. Additionally, CoinPower’s hard metal case enables products to be assembled using automated equipment, lowering production costs and eliminating risks of manufacturing defects.

Product Overview:
Type Designation Datasheet Voltage
CP 1254 datasheet 3.7 50 12.1 5.4 1.6
CP 1654 3.7 100 16.1 5.4 3.2
Benefits of VARTA Microbattery CoinPower Include:
• 10-30% higher energy density vs other competitors • Extended life time
• Best mechanical stability compared to pouch cells • Highest drain capability up to 5C
• Hard case button cell design • Not sensitive to scratches and dents
• Compact and very reliable application design • Technology protected by key patents
About Component Distributors Inc. (CDI):

Component Distributors, Inc. (CDI) is a value added distributor of electronic components, specializing in high performance wireless, sensor and power technologies for complex system applications. CDI distributes globally and provides local customer service and application support across the Americas. CDI delivers technical solutions that are easy to find and easy to buy, providing customers and supplier partners with design services, web commerce enablement and flexible supply chain solutions. Markets served include communications, computing, industrial, medical, military and consumer electronics.

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