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Charger serves load while charging batter - 07/03/97 EDN-Design Ideas The battery-charger circuit in Figure 1 monitors the battery voltage and automatically initiates a recharge if required. Its output-current capacity is sufficient to simultaneously charge the battery and supply the load. Design by Bernard Konrad, Maxim Integrated Products, Graefelfing, Germany
Charging NiMH
Cells - The latest rechargeable cell on the market is Nickel Metal Hydride (NiMH
). It has a cell voltage of 1.2v (called "Terminal Voltage" as it is the voltage across the terminals of the cell) and a capacity higher than previous types of cells. It's a real advancement in technology __ Designed by Collin Mitchell
Choosing & using Nickel-Metal-Hydride (NiMH
) Rechargeable Batteries - The number of portable gadgets that we use has grown substantially in the last few decades. Many of these, such as TV remote controls, some digital cameras, handheld GPS units, and flashlights, are designed to operate on either disposable alkaline batteries or rechargeable, and hence reusable, Nickel-Metal-Hydride (NiMH
) batteries. __ Designed by Stefan Vorketter
Constant Current Battery Charger - A simple method of charging a battery from a higher voltage battery is shown in the circuit below to the left. Only one resistor is needed to set the desired charging current and is calculated by dividing the difference in battery voltages by the charge current. So, for example if 4 high capacity (4000 mA hour) ni-cads are to be charged at 300 mA from a 12 volt battery, the resistor need, __ Designed by Bill Bowden
Constant Current NiCad Charger - The schematic for this charger is pretty simple. You can charge from 1 to 20 +/- nicads at a constant current of from 20 to 200 ma +/-. The circuit I modified from an article in July 1977 “73 Amateur Radio Magazine.” __ Designed by Pete Christensen
DC Input Controls Efficient Battery Charge - 03/02/95 EDN-Design Ideas Designing a single-rate battery charger by using a current-mode switching-regulator controller is usually not a challenge. If operating at its current limit, the controller provIdeas a constant output current that you can easily adapt to battery charging. However, the design gets more complicated if you must vary the charging current by using a dc control signal. This task is especially difficult with high battery voltages. Providing high-side charging-current sensing to eliminate sense resistors in series with battery ground is desirable. Design by Dimitry Goder, Linear Technology Corp, Milpitas, CA
Electronic NiCad GLow Plug Driver - Basically, it's a constant voltage source. It measures the voltage drop across the plug and adjusts its output to to keep that voltage constant (regardless of the resistance of the plug or the length of the wires). Therefore, when the engine floods, more power is delivered to help burn off the flood. __ Designed by Steve Sacco
Fast Charge Circuits for NiCad Batteries - Linear Technology AN37 __ Designed by Jim WilliamsFeb 1st, 1990
Fast Charger for NiMH
& NiCad Batteries - This is a truly versatile charger. It can charge up to 15 identical NiMH
or NiCad cells. You can build it to suit any size cells or cell capacity and you can set the charge rate. It can fast charge, trickle charge and has safeguards, including temperature sensing, to prevent overcharging. __ SiliconChip
Fast Charges for NiCad Batteries - AN37 Safe, fast charging of NiCad batteries is attractive in many applications. This note details simple, thermally-based fast charge circuitry for NiCads. Performance data is summarized and compared to other charging methods. __ Linear Technology/Analog Devices
Fast High Efficiency Standalone NiMH
/NiCd Battery Charging - DN380 Design Notes __ Linear Technology/Analog Devices
Fast PIC NiMH
/ NiCd Battery Charger - This battery charger charges a NiMH
5-pack battery used in the BiPed robot in less than 1 hour, and charges the 10-pack NiCd used in the Snuf robot in about 30 minutes. To prevent overheating of the battery, the charging current is turned off when the slope of the battery-voltage turns from positive into negative. A second termination-criterion of the charging process is provided for safety: the charge time is limited to about 1 hour.
Fast Universal Battery Charger: Part 2 - Second article has all the constuction details. This unit will solve all your charging problems once and for all. __ SiliconChip
Fast Universal Power Charger - It chargers NiCad, NiMH
, lithium-ion and SLA batteries as well as a conventional car and bike lead-acid batteries. Build it and solve all your charging problems in one hit. __ SiliconChip
High Speed NiCd Charger for Electric R/C - A few years back, I published a design for a Low Cost Thermal Peak Detection Charger. Since then, I've designed several other chargers, in my ongoing quest to avoid having to spend money. Of course, in building all these designs, I've probably spent more than a really good commercial charger would have cost me. But designing and building is half the fun __ Designed by Stefan Vorketter
Intelligent Lithium/NiMH
Battery Charger - this will top-up your motorbike battery in 2-3 hours and switch off __ Contact: P. Townshend EduTek Ltd
Intelligent NiCad Battery Charger - "Connect and Forget" unit fast charges 702-14.4V battery packs from power tools and model cars. A PIC processor simplifies the circuit. __ SiliconChip
Intelligent NiCd/NiMH
Battery Charger - This cheap and easy to build NiCd/NiMH
Battery Charger is suitable for automatically charging a wide range of batteries for many applications. Proper chargers are usually expensive and cheap chargers supplied with the original equipment often incorrectly charge the cells and dramatically shorten their life.
Lithium-Ion Batteries Zap Adapter - Don't throw away those seemingly un-chargeable, rechargeable batteries; they could very well be brought back to life with the aid of this simple circuit. (Tony van Roon's Tony van Roon) __ Designed by Tony van Roon VA3AVR
Low Cost Thermal Peak Detection NiCd Charger - The electric model aircraft and car industries have produced a bewildering array of field chargers for NiCd motor battery packs. These range from simple 6 or 7 cell chargers consisting of a resistor and mechanical timer, to more complex chargers with peak detection, cycling, and the ability to handle 36 cell packs __ Designed by Stefan Vorkoettert
LT1511 Low Dropout Constant-Current/Constant-Voltage 3a Battery Charger - DN144 Design Notes __ Linear Technology/Analog Devices
Make a Constant Current NiCad Charger - The schematic for this charger is pretty simple. You can charge from 1 to 20 +/- nicads at a constant current of from 20 to 200 ma +/-. The circuit I modified from an article in July 1977 “73 Amateur Radio Magazine.” __ Designed by Pete Christensen
Mini Mill Battery Charger - Taking about 30 minutes to make from old computer parts, the Mini Mill will can charge a couple of NiCad batteries. __ Designed by Flavio Dellepiane
Multicell Charger - Using this charger, you can safely charge up to two pieces of Ni-Cd cells or Ni-MH cells. The circuit is compact, inexpensive and easy-to-use. The 230V AC mains is down-converted to 12V __ Electronics Projects for You |
