delabs Circuits

Showing posts with label Battery-Management. Show all posts
Showing posts with label Battery-Management. Show all posts

Sunday, February 05, 2017

Lead Acid Batteries Usage in Power Systems

The Lead Acid Batteries are used in Automobiles and UPS - Uninterrupted Power Supplies. Battery Banks and Arrays are used in Home and Industrial Power Systems with Solar and Wind power charging too.

Lead Acid Batteries Usage in Power Systems

These batteries have survived many other types, for rugged high power usage, even beyond 100Kva. It is all the more important for us, to learn how to use them properly. Intelligent charge controllers and charge-discharge cycle regulating managers, will ensure a long lifespan for optimum cost-effective usage of this Electro-Chemical Wonder.
A home power station is what we all should try and build on our own, Make designs that are serviceable and maintainable. Solar Power, Waste Organic fuel Power, Even Pedal power Low cost Systems need to be designed.

On the other side, switch to low power Tablet PCs, even if the power of computation is less. Use Applications that use less resources, Switch to Open Source. A HandHeld PC should not take more than 12 watts on normal usage. Use Web Applications hosted on Green Servers, here the power of computation is shared.

The wastage of power in many companies are enormous on standby. Some have many systems turned on with hardly any usage, I have seen in an office a 300 W load of a computer; turned on for a whole week, for just sending a few mails and printing a few documents. Certainly the Telex machine was eco friendly and even the electronic typewriter was sensible.

A Green solution could be New Desktop Computing Standard - The quiescent losses in this is only the wifi server cube, which can serve 6 tablets or UMPC. So if 6-12 people are using computers, many desktops need not be on. Tablets, Laptops and Notebooks consume less power and run on batteries. Thin Custom Notebook and Tablet Clients can use one OpenOffice on the WiFi Application Server cube

Monday, May 09, 2016

Battery Charger and Rechargeable Batteries

The main Types of Rechargeable Batteries are NiCd - Lead Acid - NiMH - Lithium ion. The Gel Lead Acid Battery is Termed Maintenance Free and may have to be treated differently for charging.

List of battery sizes - Wikipedia

Battery Types and their Sizes

4.5 Volt - D - C - AA - AAA - 9 Volt - SR41/AG3 - SR44/AG13

Battery Charger Circuits and Resources

Solar charger for lead-acid batteries
The charger will stop charging once a pre-set voltage (temperature compensated) has been reached, and recommence charging when the voltage has dropped off sufficiently.

12 Volt Gel Cell Charger
When a discharged gel cell is connected, the charger goes into a fast charge mode at a fixed rate of 400 ma. After the chip detects the voltage leveling off or when 4 1/2 hours has elapsed.

Temperature Controlled NiCd Charger
This circuit is for a temperature controlled constant current battery charger. It works with NICD, NIMH, and other rechargeable cells.

Battery charger 150-1700 mAh with PIC16F876
This is the extension of the simple battery charger to different battery capacities. The software and the controller are largely identical.

MAX846A Cost-Saving, Multichemistry, Battery Charge Chip
In its simplest application, the MAX846A is a stand-alone, current-limited float voltage source that charges Li-Ion cells. It can also be paired up with a low-cost microcontroller (┬ÁC) to build a universal charger capable of charging Li-Ion, NiMH, and NiCd cells.

Rechargeable Batteries and Chargers
There are three types of rechargeable batteries. They are Nickel-Cadmium (NiCd), which are the oldest type; Nickel-Metal Hydride (NiMH), which were developed around the same time that low-cost digital cameras were invented.

Wednesday, April 06, 2016

Battery and Energy Management

Using Rechargeable Battery is Environment Friendly. The 1.5V and 9V are more popular in small devices and flashlights and can create more E-Waste. So rechargeable better is it not?

Battery and Energy Management

There is also a 4.5V Battery or Cell. This is not so popular, it is bigger too. It packs more punch or current, i used it to flash mini Magnesium bulbs. Luckily i did not hurt my eyes in this fascination. Many cells form a battery, but in Normal Spoken English, both mean same. A cell is a single unit of cathode-anode-electrolyte. Things you ought to know

Never Short Circuit a Battery, Fire hazard, Chemical Spill.Keep the Terminals of Battery and Gadget clean, Shiny.
  • Guard it - Dust, Grime, Rust, Liquids & small metal objects.
  • Storage - Never keep in a Metal Box or Can or Metal Safe.
  • Use Rechargeable Batteries, that is good for the Planet Earth.
  • Do not leave dead batteries in Device and forget it for days.
  • Keep away from Heat, Direct Sunlight and High Humidity.
  • Unless allowed, do not keep a charger always linked to Device.
  • Do not Stock or build Inventory of Batteries, buy on demand.
Related Posts

Electropaedia - Energy Sources and Energy Storage, Battery and Energy Encyclopaedia and History of Technology

This Website has Sufficient Data on Alternative Energy (electrical). Energy Conversion and Management and most important ... Batteries. Batteries are a bit expensive, they have a long life. If care is taken, they can last long. Any Energy Harvesting needs a Battery as an Electrical Flywheel. SuperCaps too act as buffers or large reservoirs.

Electric power generation and energy supply technologies.
  • Energy from Fossil Fuels
  • Energy from Biofuels
  • Solar Energy
  • Wind Energy
  • Nuclear Energy

Thursday, March 10, 2016

Electric double layer capacitor an eFlywheel

The Electric double layer capacitor has the main use of a Charge Reservoir. That means a large amount of electrical charge in a small footprint.

These charge/discharge quickly unlike the battery, There is no Electrical Energy to Chemical Energy Transformation and back, like in batteries. It may need caution in design and usage as they may carry a lot of punch.

Electric double layer capacitor an eFlywheel

Also known as Ultracap, Goldcap, Supercap - Electric double layer capacitor, In Farads, like batteries, Energy Reservoirs or eFlywheel.

In Product Safety terms; The Battery has a Internal Resistance, but a Supercap does not. When used in Values like 100F and is fully charged, an Internal or External Breakdown of Insulation or Short Circuit may Occur. The Heat Generated is Enormous. Murphy's Law says such things happen..

Supercap at Wikipedia

Electric Double Layer Capacitor (EDLC) or SuperCapacitor

DLCAP - Electric Double Layer Capacitor - Nippon

They have a range of Supercapacitors upto 2500F at 2.5V and Modules like 400F and 15V. There are two types Prismatic and Cylindrical. In comparison to batteries - multi-million cycles of charge-discharge is possible.

EverCAP - Double Layer Capacitors - Nichicon

They have two types, High Power Density for a large current discharge. High Energy Density for a long backup time. Over a million Charge/Discharge cycles. High Efficiency. Capable of fully discharging to zero volts.

Some things to note for a design engineer. The EDLC or Electric Double Layer Capacitors ...
  • Specified Endurance and end of life.
  • Excess Vibration can alter Specs.
  • Caution - The maximum temperature.
  • Specs are dependent on Temperature.
  • Maintain Low ripple current on Charge/Discharge.
  • It is Polarized like a Electrolytic cap.
  • Not Hot parts or Heatsink near cap.
The Double Layer Capacitors developed by WIMA are storage capacitors with highest capacitance values in the Farad range.

GTO Capacitors - WIMA

They are among others suited to serve as batteries, can deliver considerably higher currents for a short time, however, and are maintenance free.

SuperCapacitors - WIMA - These EDLC supercap has one-tenth of energy, but delivers over 10 times of power due to ultra low ESR. In Comparison with a Battery. A Lifetime of over 500,000 cycles.

Xelled Supercapacitor - Vinatech

Some Specs
  • Rating 2.5V / 2.7V
  • High power density (low internal resistance)
  • High electrical current, instant power back-up applied

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