Improve Battery Performance with Proper Charging Methods Understanding different charging methods is key to extending the life of batteries destined for medical electronics. To a large extent, the reliability and longevity of a battery hinges on the quality of the charger. In a price-competitive market, chargers are often given low priority, especially for consumer products. This article assesses the charger as the quintessential provider and guardian of the battery. It also examines recommended charge methods to increase the performance of nickel-cadmium (NiCd), nickelmetal hydride (NiMH), and lithium ion (Li-ion) packs. Well-performing batteries and chargers are especially important for instruments where battery failure is not an option. A battery should always remain cool during charging because high temperatures shorten battery life. However, some temperature rise cannot be avoided when charging nickel-based batteries. The temperature peaks when the battery approaches full charge, then moderates after the battery switches to trickle charge. The battery should eventually cool to room temperature. If the temperature remains above room temperature after a few hours in ready mode, the charger is performing incorrectly. Remove the battery when ready because any prolonged trickle charging will damage the battery. The caution applies especially to NiMH because this chemistry cannot absorb overcharge well. A lithium-based battery should never get warm during charge. If this happens, either the battery or the charger is faulty. Discontinue its use. Nickel-based chargers are grouped into three categories: slow, quick, and fast. The slow charger, also known as , applies a fixed charge of about 0.1 C (one-tenth of the rated capacity) for as long as the battery is connected. The charge time is 1416 hours. The C rate is a unit by which charge and discharge currents are scaled. A charge current of 1000 mAh (1 C) will charge a 1000-mAh battery in slightly more
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Battery Charger ICs
Battery charger ICs are integrated circuits (IC) that are used to charge batteries.
Rechargeable (Secondary) Batteries
Rechargeable batteries or secondary batteries contain active materials that can be regenerated by charging. When the energy produced by rechargeable batteries drops below optimum efficiency, secondary batteries may be recharged in a couple of ways, depending upon their construction.
Battery chargers are devices for charging rechargeable batteries.
Industrial batteries translate chemical energy into electricity.
Lithium batteries have a lithium anode. They are available as both primary batteries and secondary batteries.
Topics of Interest
A battery charger is a device used to put energy
into a battery by forcing an electric current trhough
it. The charge current depends upon the
technology and capcity of the battery being
AN1137 Using the MCP1631 Family to Develop Low-Cost Battery Chargers COMMON CHARGE PROFILES Author: Terry Cleveland Microchip Technology Inc. NiMH Charge Profile INTRODUCTION Figure 1 shows a typical...
>Designing a battery charger for nickel, lithium-ion (Li-ion) and lead-acid cells requires special considerations for proper charging and safety.
Driven by the need for untethered mobility and ease of use, many systems rely on rechargeable batteries as their primary power source. The battery charger is typically implemented using a...
Great stuff - tested and approved in our top-secret labs. Need to goose the juice in your rechargeable batteries? C. Crane's QuickCharger refuels NiCad cells and the newer nickel-metal hydride ones,...