How to Charge Li-Ion with a Parasitic Load

Contributed commentary by Isidor Buchmann, CEO & Founder, Cadex Electronics Inc.

Charging a battery is simple but the complexity rises when a parasitic load is present during charge. Depending on battery chemistry, the charge process goes through several stages, and with lithium-ion Stage 1 consists of a constant current (CC) charge that brings the battery to roughly 70 percent state-of-charge (SoC). The cell reaches 4.20V/cell, a common voltage limit for Li-ion, after which Stage 2 continues by applying a constant voltage (CV) charge. The current begins to drop as the battery saturates. Full-charge is reached when the current decreases to typically 0.05C, which is one-twentieth of the rated ampere-hour. Li-ion cannot absorb overcharge and no charge is applied in Stage 3. Figure 1 illustrates typical voltage, current and capacity signatures of the CCCV charge. Read more about How to Charge Li-Ion with a Parasitic Load

Ultra-Fast Charging: Respecting the Limits of a Battery when Feeding

Content Contributed by Isidor Buchmann, CEO & Founder, Cadex Electronics, Inc.

Consumers demand faster charging times. Leading in this movement is the electric vehicle (EV) industry that strives for charge times similar to filling up a vehicle at a gas station. Pumping 50 liters (13 gallons) of fuel into a tank holds a calorific value of 600 kWh. The fill-up is quick. An EV battery, in comparison, only stores between 50 to 100 kWh of energy and charging takes a long time. Read more about Ultra-Fast Charging: Respecting the Limits of a Battery when Feeding

Futuristic Trends in Battery Charging Technology

By Edward McMahon, CEO
Epec Engineered Technologies

Every day more and more of the things we use on a day-to-day basis use batteries. The global market for batteries in 2014 is $83 Billion, and according to research from The Fredonia Group, it will grow at a CAGR of 7.8 percent through 2019 as devices continue to proliferate. Rechargeable lithium-ion batteries make up the largest segment and market growth will be driven largely by hybrid and electric cars and batteries for electronic devices. Read more about Futuristic Trends in Battery Charging Technology