How to Select a Coin Cell Battery Holder for Maximum Shock and Vibration from buzai232's blog

How to Select a Coin Cell Battery Holder for Maximum Shock and Vibration

Lithium coin cells like the CR2032 have found their way into a multitude of portable electronics applications, many of which will require battery replacement. To be end-user friendly, designers must ensure coin cells are mounted in battery holders that make battery replacement simple and fast. At the same time, the battery holder must have a robust design that maintains good connection to the cell even in the presence of shock and vibration. Cell holders must also offer safe retention of the cell and protect against inadvertent short circuits.Get more news about Cerall Battery Box,you can vist our website!

On the manufacturing side, the cell mounts must be designed for automated pick-and-place production with a clear separation of connections. Cell mounting designs should be available with either surface or through-hole mounting.

This article looks at the concept behind these battery holders, reviews their unique features and benefits, and reviews design considerations when selecting coin cell battery holders. It then introduces and shows how to apply the Snap Dragon series of coin cell holders from Memory Protection Devices (MPD) that use a non-conducting, snap-in cover to address designers’ concerns.
To address these design requirements, MPD introduced the Snap Dragon series, a whole new category of cell holders. These greatly increase the reliability of open-top coin cell holders through the use of a locking, snap-on cover that prevents shock, vibration, and drops from dislodging the cell or causing intermittent connections. To meet the user-friendly requirement, the cover can still be removed in a “snap”, allowing for quick and easy battery replacement.

For manufacturing, the device’s liquid crystal polymer (LCP) base is tolerant of high-temperature reflow soldering processes. The snap-in cover is not only designed for ease of use, its use of polypropylene material means it is strong and flexible enough to allow multiple battery replacements over time. Even with these features, the Snap Dragon holders keep a very low profile, typically adding only 1 millimeter (mm) to the coin cell battery above the pc board.

Taking a closer look, the Snap Dragon coin cell battery holders use a two-piece design consisting of a snap-on battery retainer and a mating base, which together hold the cell (Figure 1).
While some high-reliability cell holders can make user battery installation and replacement difficult or impossible, the Snap Dragon cell holder is designed to offer an easy and intuitive process. The Snap Dragon design is patent pending and is the newest addition to MPD’s portfolio of battery holder technologies.

Snap Dragon coin cell holders are available in two different sizes to fit BR/CR2032 and BR/CR1225 cells in either horizontal or vertical orientation. They can be supplied with either tabs for surface mount technology (SMT) soldering or pins for through-hole mounting on a printed circuit board. These cells offer up to approximately 220 milliamp-hours (mAh) of power and are quite small, making them perfect for circuits with low power requirements in handheld portable devices (Figure 2).