Epec's Blog | Electronics Manufacturing Solutions

When designing a custom battery pack, a topic that will come up between the manufacturer and the customer deals with the fuel gauge. The battery fuel gauge can be found in a range of everyday devices that we use, such as cell phones and computers. The function of the fuel gauge is to inform the customer on how much state of charge (SoC) and state of health (SoH) is left in the battery. The fuel gauge can predict the remaining capacity by measuring the voltage, battery temperature, and current.

At the conclusion of our webinar, Battery Packs for Medical Devices: Requirements and Certification - we had several questions submitted to our presenter, Battery Development Consultant Randy Ibrahim. We compiled these into a readable format on our blog.

When deciding on the types of power to supply equipment requiring high performance, rechargeable batteries are often chosen for several reasons. With rechargeable batteries, users can obtain longer device performance and consistent power. In addition, rechargeable batteries are ideal for devices that are lightweight, such as mobile applications. These devices may have a battery pack that can be taken from off the device, such as the ones on power tools, and placed into a charger that connects to a wall outlet.

Many applications do not run as standalone systems. Instead, there will be multiple subsystems involved that can perform a variety of functions for the work output or to monitor internal systems to ensure optimal and safe performance. These systems need additional logic support to keep systems running or to improve system performance. However, there will be times when the application itself does not have these logic functions originally installed. So, another system must be added into the application to provide these functions.

Customers who have products or applications using lithium-based batteries understand the risks involved in keeping the battery packs safe during manufacturing processes, when transporting them to specified locations and when they are in use.

Supplying custom battery packs to companies in aerospace, medical, military, oceanography, and other industries requires the skills and technical expertise provided by quality manufacturers such as Epec. Yet, the design and build of the battery pack is often only part of the customer's order.

With electronics becoming more portable and lightweight, they require batteries that offer long hours of battery life before recharging. Lithium batteries are becoming common place in electronics such as smartphones, laptops, and tablets as they can last for up to 2 years to 5 years. However, failures can cause lithium battery packs to malfunction. The type of problem will be based on the construction of the battery pack, how it is charged, how it is used and handled, and environmental factors.

Portable devices are everywhere. When thinking about the top portable devices that we use daily, smartphones, tablets, and laptops will dominate the list. Yet, there are numerous applications that rely on portable devices. Manufacturers of medical devices, military devices and even kid's toys rely on holder and mounting designs to secure batteries in portable devices. How the batteries are secured plays an important factor. These applications can experience a range of extremes such as shocks, vibrations, drops, and temperature fluctuations.

When power applications and equipment with custom battery packs, it's ideal to place batteries in storage when not in use for extended periods of time. This practice will prevent batteries from becoming overcharged in equipment and degrading.

The development of a battery pack relies on a full understanding of the components that are necessary to supply the right amount of power on demand and at a safe rate, providing adequate recharge times, and providing optimal shelf storage. This step requires fully outlining and providing details regarding the application and power needs of the product.