Exploring Lithium Ceramic Oxide Batteries with TDK

The relatively new lithium ceramic battery composition is currently available on the Digi-key site as a 1.5V TDK engineering sample. Given the promising potential of this variety, it will likely become a standard commercial product in the future. There are some application notes and handling procedures that should be studied before purchasing, though, as these CeraCharge™ batteries have some unique characteristics that separate them from other lithium compositions.

Click here for part numbers B73180A0101M199 (tube packing) and B73180A0101M062 (tape/reel packing) [ Batteries Rechargeable (Secondary) | Battery Products | DigiKey ].

A considerable difference between the TDK lithium ceramic oxide batteries and other battery types is that the product is shipped without an initial charge (zero volts) and is non-polarized until it is used within a circuit and charge is applied. There are significant advantages to designing and shipping the product in this state.

There is less risk of improper circuit design or placement of the battery in its initial 0V state. This allows complete design freedom during the prototype stage since polarity isn’t a factor. Although the battery could be charged prior to soldering, this would create problems when ensuring proper alignment during any later PCB assembly. The lack of any actual charge during shipment also avoids the restrictions placed on transporting other lithium battery compositions or charged batteries in general.

TDKLCInitialCharge

Other important considerations involve the operating humidity level, a change in volume during charging, and a variance in nominal capacity until a few charge/discharge cycles are completed.

TDKLC

In general, the environmental operating conditions suggest an enclosed application. This could either be within a building where the temperature and humidity are controlled, or it could be within an enclosure where the ambient conditions would otherwise be unsuitable.

TDKLCOperation

After soldering, onboard coating (encapsulation) is recommended. Mechanical clamping should be avoided.

TDKLCEncapsulation.PNG

There are three different charging options for a CeraCharge battery. Note that each of these requires a different control circuit—this is not built into the battery.

TDKLCCharging

The application focus for this lithium ceramic oxide battery with its compact 1812 size is miniaturization and embedded solutions for IoT, low-energy harvesting and storage systems, etc. The simple design also makes it easy to incorporate into standard PCB architecture and automated, high-volume manufacturing.

Design and operation of these TDK lithium ceramic oxide batteries does require some up-front research, though. There are two main manufacturer documents with very detailed information to help customers get started.

TDK CeraCharge™ Rechargeable Multilayer Ceramic Battery Datasheet: [click here https://media.digikey.com/pdf/Data%20Sheets/TDK%20PDFs/B73180A0101M062_DS.pdf ]

This document includes:

–General technical data (electrical specs)
–Recommended charge profile
–Discharge characteristics
–Temperature characteristics
–Cycle characteristics
–Typical pulse power
–Dimensional drawings
–Reflow soldering profile
–Cautions and warnings (general, design notes, storage, handling, etc)

TDK CeraCharge™ Application Note: [click here https://www.tdk-electronics.tdk.com/download/2532510/0baaef1097967ec2ff7f5251d821eaf1/06-dl-application-note.pdf ].

This document includes:

–Overview
–Key benefits and specifications
–Onboard coating
–Basic usage
–Series and parallel connections
–Additional application notes

To compare the TDK lithium ceramic oxide batteries to other compositions, please review our rechargeable battery category: [click here https://www.digikey.com/products/en/battery-products/batteries-rechargeable-secondary/91 ]. Product Index > Battery Products > Batteries Rechargeable (Secondary)

Batteries and associated products can also be found by searching from the Digi-key home page: [click here https://www.digikey.com/ ]