DfR Solutions Reliability Designed and Delivered

Understanding the Root Causes of Battery Failure

Posted by Vidyu Challa on Feb 21, 2017 9:35:00 AM

The race to improve the performance and reliability of batteries is on, from electric vehicles to advances in wearables and mobile devices. In the pursuit of performance and the desire to outpace competitors, manufacturers may be tempted to overlook potential shortfalls. Most notably, Samsung made news when the company halted production of its Galaxy Note 7 and eventually scrapped the entire product after devices caught fire.

Topics: Battery Reliability

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How to Select the Right Battery for Your Application? Part 3: Common Secondary Battery Chemistries

Posted by Vidyu Challa on Feb 2, 2017 9:28:00 AM

In part 1 of this 3-part blog series, we discussed the most important metrics for battery selection. One thing to remember about battery selection is that it is essentially about managing tradeoffs. You trade off some battery metrics in order to gain in others – for example in order to gain power density, you may have to trade off energy density.

Topics: Battery Reliability

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How to Select the Right Battery for Your Application? Part 2: Common Primary Battery Chemistries

Posted by Vidyu Challa on Jan 27, 2017 9:37:00 AM

In part 1 of this 3-part blog series, we discussed the most important metrics for battery selection. One thing to remember about battery selection is that it is essentially about managing tradeoffs. You trade off one feature in order to gain in another – for example in order to gain power density, you may have to reduce energy density.

Topics: Battery Reliability

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Lessons Learned from the Samsung Galaxy Note 7 Battery Fires

Posted by Vidyu Challa on Jan 26, 2017 3:51:49 PM

Samsung finally released details early this week on the root cause of the Galaxy Note 7 fires and explosions that started to show up in August 2016. You can find details on the story here, but the gist of the matter is – failures and explosions started to show up with batteries from Manufacturer A, soon after the phone started to sell. Samsung provided replacement phones with batteries from Manufacturer B, but the failures and explosions continued (if you are in the battery world you would use the phrase “spontaneous disassembly”). The company had to halt production and eventually scrap the entire product.

Topics: Battery Reliability

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How to Select the Right Battery for Your Application? Part 1: Important Battery Metric Considerations

Posted by Vidyu Challa on Jan 20, 2017 9:36:00 AM

The one thing to remember about battery selection is that there is no such thing as a perfect battery that works for every application. Selecting the right battery for your application is about identifying the most important battery metrics and trading these off against others. For instance, if you need a lot of power for your application, cell internal resistance needs to be minimized, and this is often done by increasing electrode surface area. But this also increases inactive components such as current collectors and conductive aid, so energy density is traded off to gain power.

Topics: Battery Reliability

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