Category Archives: Batteries

Wireless Charging and Electric Vehicles

In our daily lives, we are increasingly using wireless products. At the same time, researchers are also working on newer trends in charging electric vehicles wirelessly. With more countries now implementing regulations for fuel economy and pushing initiatives for replacing fossil-fuel based vehicles with those driven by electricity, automotive manufacturers have focused their targets on development of electric vehicles. On one hand there are technological advancements on lithium-ion batteries and Read more [...]

What is an Instantly Rechargeable Battery?

The batteries required to power them have so far impeded advancement of electric cars. A primary difference between vehicles powered by fossil fuels and those powered by batteries is that batteries tend to discharge with use and require a finite time to recharge, immobilizing the vehicle for that period. On the other hand, simply filling up the gas-tank with fossil fuel is enough to keep the car rolling on the road. However, that may be changing now. Research at the Purdue University has led to Read more [...]

Battery Monitoring with Comparators

So many portable consumer electronics gadgets in use today use small, button- or coin-cell batteries. Sometimes it is necessary to monitor their state-of-charge (SOC) and health efficiently without affecting their SOC significantly, but this can be a challenge. However, simple low-power monitoring circuits for small batteries using comparators can overcome this challenge. Managing Batteries in Portable Systems Usually, the system engineer budgets the system power requirements carefully during the Read more [...]

Boosting Battery Life in IoT Devices

Earlier, the assumption was unused energy from the environment, machines, people, and so on could be used to power valuable devices and this would be done for free. The assumption was based on the convergence of four key technologies to enable mass adoption of energy harvesting—efficient voltage converters, efficient harvesting devices, low-power sensors, and low-power microcontrollers. However, it was soon realized that although energy harvesting does operate for free, the system needs investment, Read more [...]

Salt Water Makes Li-Ion Batteries Safer

So far, high-energy lithium-ion batteries were always a matter of concern on account of safety. If you wanted to remain safe from exploding batteries, an aqueous battery such as made from nickel/metal hydride would be preferable, but then it would give you lower energy. Usually, 3-V batteries using aqueous electrolyte technologies are unable to achieve higher voltages because of the cathodic challenge. This happens as the aqueous solution degrades one end of the battery made from either lithium Read more [...]

A Cheaper Alternative for Batteries—Sodium Ion

A vast majority of electronic equipment running on batteries rely on the Lithium-ion technology for their electrode material. Since Lithium is relatively rare, its mining and refining make it an expensive material to use. This has led scientists to search for a cheaper alternative, and they have turned to the cheapest substance available, the common salt. A team from Stanford has developed a battery based on Sodium-ion whose cost per storage capacity is far lower than that of the existing batteries Read more [...]

Nano-Diamonds Help Prevent Lithium Battery Fires

Last year, airline flights banned Samsung Galaxy Note 7s because of its battery-related fires and explosions. Scientists researching the source of the runway beat buildup found the culprit to be small dendrites forming between the anode and cathode of the battery. A materials specialist from the Drexel University at Philadelphia has proposed a low-cost easy solution to preclude dendrite formation. According to Drexel professor Yury Gogotsi, this simply requires mixing nanodiamonds with the regular Read more [...]

Rechargeable Battery Packs Benefit From Integrated Battery Pack Monitor

Increasingly, electronic devices are depending on more than one battery unit for deriving power—driving motors require a higher voltage than does the control system. This includes energy storage systems, toys, scooters, e-bikes, handheld power tools, lawn equipment, and vacuum cleaners. So far, battery monitors could only monitor the entire battery pack and not the individual batteries making up the pack. Now, Intersil has developed a battery pack monitor with a difference. Not only can it monitor Read more [...]

Non-Toxic Batteries for Humans and Fish

Lithium-ion batteries are very popular nowadays, as everyone has one in their cell phones. Although people use batteries of a large variety of technologies and form factors, everyone wants one with high energy density, low weight and volume, superior charge/discharge characteristics, and low cost. The Lithium-ion chemistry is popular, as it tends to meet most of the above desirable characteristics, even though it has several variations. However, some applications need batteries with unusual construction, Read more [...]

How Does An All Solid State Battery Work?

At the University of Texas at Austin, a 94-year old professor of engineering and his team continues to work on their invention—batteries. John Goodenough, one of the inventors of the most commonly used batteries — the lithium-ion battery. At present, Goodenough is working on an all solid state battery, a low-cost cell that offers a long life cycle, fast discharging and charging rates, and high energy density. According to Professor Goodenough, one of the reasons for battery-driven cars not Read more [...]