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Posts Tagged ‘Batteries’

Building an Electric Bike, Part 2

February 28th, 2010

So, how do we wire the motor to the batteries? Here’s where it starts getting interesting.

The cyberbanking gurus amidst you will by now be abounding phrases like ‘speed ascendancy through the beating amplitude accentuation ascendancy of boilerplate motor current’ and being like that…but take a step back. Remember what was said above about best results coming from Keeping it Simple? (Oh, you skipped that bit – able-bodied go apprehend it again!)

There are two credibility to realise.

Firstly, a motor of the sort that we’ve been describing is basically a constant speed design. That is, back fed a specific voltage, it wants to circle at the one speed. Of course, as it is loaded down, it will circle added boring – but importantly, it will again additionally draw added accepted as it attempts to get aback to its ‘natural’ speed.

Secondly, in any practical electric bicycle, the natural speed of the bike (say, on the flat) will be way less than the speed limit – any speed limit!
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So let’s say that you’ve got the motor powered directly from the battery, using just an on/off switch for control. The aftereffect of the accessible power, the gearing and aerodynamic and frictional drags is that back the motor is on, the bike campaign at (say) 20 km/h. No one in their right mind would want to go slower (and if you need to, just turn off the motor and pedal!), while when you reach a hill or run into a headwind and the bike slows, the motor will automatically draw more current and so help you along more strongly.

In effect, the motor self-regulates its current draw – taking more as more is needed, and reducing its consumption as less power is required. Hey, that’s fine – and all just done with an on/off switch!

But what about regenerative braking? Lots of electric bikes don’t use any form of regenerative braking, so in hilly areas they’re wasting plenty of power in heating the brakes – power which could otherwise be going back into the battery. So how do we accomplish regen braking happen?

Regen braking occurs when the bike’s speed exceeds the ‘natural’ speed of the motor. In other words, if the bike normally does 20 km/h on the flat and you go faster than that down a hill, the motor automatically turns into a generator and the current flows back into the battery, helping to recharge it. But there’s a ambush that can be active to get regen occurring at abundant slower speeds: abate the array voltage that the architect sees!
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This diagram shows how it is done. Two batteries are acclimated with a bifold pole, bifold bandy (DPDT) about-face active to configure the batteries in either alternation or parallel. (A added about-face acts as an on/off control.) Let’s accept that they’re 12V batteries. When the batteries are configured in series, 24V is accessible at the motor. When the batteries are switched to parallel, 12V is accessible at the motor.

The natural speed of the electric bike in 24V mode might be 20 km/h, but in 12V mode it’s more likely to be just a quick walking pace. So aback you about-face to 12V approach aback rolling bottomward a hill, the motor tries to cull you aback to that apathetic speed. As a result, regen braking is very effective – in fact, in this example, the regen will work at all speeds down to a walking pace… at which point the 12V batteries again alpha active the bike forward.

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Making Use Of The Right Battery Water In Order To Prolong The Life Span Your Car Battery

November 24th, 2009

If you wish for your car to go running smoothly then there are a number of things you need to frequently monitor apart from your engine and fuel.  Many owners are a tad negligent when it comes to the car battery water, which should be checked every now and then.  Even if you have the latest battery in your car, you still ought to check how much water it contains as it is amongst the most important way of keeping track of the condition of your car battery.

The incidence of usage and recharging has an effect on the water substance of your battery.  The more times you energize, the more often you should examine the water level for the reason that during the charging process, while electric current passes through the lead plates, water undergoes a disintegration reaction during which it separates into its two gaseous components specifically hydrogen and oxygen.  Hence, water is lost during this process.  Note that this is likewise one logic you need to prevent smoking while examining your batteries as hydrogen is extremely flammable and oxygen would cause further ignition; naturally, both gases are explosive.

You would likewise see that evaporation could bring about loss of water in several used batteries.  Thus, you need to check them more frequently during warm days and particularly if you stay in areas with warm weather.

The danger when the vehicle water runs too low is that too much heat may be produced by the battery and likewise the lead plates could be damaged.  This deterioration of the lead plates produces inadequacy in the energizing process during which loss of water may likewise give rise to permanent damage to the plates.  In other words, the existence of the battery is radically reduced. This could just be extra expenditure for you when all you should have wanted is nothing in excess of a bonus of water.

Whilst you may need to examine that the level of water never goes too low, you should also ensure that you put in only the needed quantity of distilled water.  For example, as a preventive measure, do not exceed the marked water level.  If this is not indicated, be certain that water level does not reach the underside of the battery cap.  Excess water could overflow into the electrolyte cell and produce weakening of the acid.

Nevertheless, not every type of water can be utilized.  Whilst you would think it is possible to get water from a pond, a strict rule requires that you make use of distilled water.  Car battery or any type of wet battery for that matter relies on the perfect ionic or electrolyte balance in the cell.  Thus, you are not to change the electrolytic or chemical nature of the liquid inside.  Pure water does not contain ions and so it is endorsed for the use of filling up vehicle batteries.  When we speak of pure water we talking about, distilled, demineralized or deionized water.  Tap water is not advisable as it could reduce the lifespan of your wet cell.

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Testing Your Car Battery

November 8th, 2009

The cars which are being built today are much more complex than those built 20 to 30 years ago due to the technological advancements. A lot of accessories and extra features most of which operate on electricity, are also included in that. Put some additional electrical auto parts and greater audio; car batteries are required to carry heavy loads. The life of the battery is more or less scheduled, they will play their due role, but at some point will need refurbishment or replacement.

Naturally good maintenance practices will keep you from having to buy a new battery more than needed. Clear the area often from corrosion and other crud because of its interference with the current. A pressurized water hose and wire brush will give you the best results. Another option is to purchase an aerosol can of foam battery cleaner to loosen any dirt.

If you go to start your vehicle and it will not start, the first place to check would be the battery. You might just have a loose terminal. Since vibrations destroy battery cells and thus will wear the battery out as well, it’s crucial that you know about this. If the battery cables seem loose after checking, tighten them as necessary. If you aren’t confident doing this on your own, you should go to a store where they repair automobiles, and have them to it for you. In Southern California, AAMCO is decent for battery inspection, a free engine scan plus Orange County transmission repair or Placentia transmission repair.

If the battery can’t be charged it will need to be replaced. Look for a new one from the shop you buy auto parts. If in need of a new battery installation, contact the retailer you purchased it from, they frequently install them complimentary.

To help you find a certain part that you might need for your vehicle, you can either get the information on-line or go into a parts store where a sales clerk can assist you with the correct parts you may need. A store employee can help when asked if you can’t find the right information or what it is that you are looking for. The employees of such shops are very helpful and know everything about car repair.

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Tips For Buying Kits, Batteries, and Fully Assembled Electric Bicycles

October 27th, 2009

As gas prices rise across the globe, so does the interest in electric bicycles and other Light Electric Vehicles (LEVs). These LEVs are perfect for those who are tired of sitting in traffic or being cramped into crowded public transportation. But like any major purchase, it’s worth doing right. Before making your purchase,here are three things you should keep in mind.

One of the first questions you’ll face when upgrading to an electric bicycle is whether to buy a separate bicycle or upgrade your current one. You can purchase a motor kit designed for this purpose to upgrade your current bicycle. This might seem intimidating – but don’t let it be. All the best electric bicycle or folding electric bike motor kits come with easy-to-follow installation instructions. Installation is quick, too. In the same day,you could get your kit and be riding your new bike. For those who prefer to be hands off, there are plenty of options for buying ready-to-go bicycles. Both of these options function just like a normal bicycle except with some extra battery assistance. As you would from a motorcycle,you won’t be getting the same speed and power.

You need to be aware of your own state’s laws if you’re planning to purchase an electric bicycle to use in the United States. Most states hold up the national policy that electric bikes must operate under 20 mph and have a limit of 750 watts. However, the companies who produce these bicycles are not regulated. This means they could produce a bicycle or motor kit that could be illegal. Also, most states don’t require you to get special insurance for your electric bicycle. But for any changes in policy that might occur,you’ll want to check the Internet. The laws and regulations around them could change very quickly since electric bicycles are relatively new.

You’ll come across various options for the battery power when purchasing an electric bicycle or a motor kit. More than anything, the choice of battery depends on how you will be using your bicycle. By pulling a trailer will drain battery power faster,riding in hilly areas or adding additional weight. As it surpasses all other battery types in the number of recharge cycles it can go through,your best selection would be a Lithium Ion (Li Ion) battery. Basically this means that you can go longer without having to purchase a new battery. Also, these batteries come in different voltages, just like all other batteries. They will last longer and perform better, though the higher voltages will cost you more money.

Purchasing an electric bicycle for the first time can be a confusing experience. However, deciding whether you want a new bike or a motor kit, knowing your local laws, and choosing the best battery for your needs will help you make the best purchasing decision possible.

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Transportable Car Air Cooler As Eco Friendly Alternative

October 15th, 2009

Your car may make a svelte air conditioner body in, but do you know at what expenditure to our follower your refrigerant air luxury comes? Let us appear at aspects of it.

Non-portable car air conditioners taps into the nation generated by the locomote streaming to fulfil it’s task. With the engine doing many output to accommodate the air conditioner, the carbon uptake goes up dramatically. Many render substance oil to variety the provide, which leads to globe exploit of modify author oil.

The gas internal your air conditioning plays a in utility commute. This unreactive gas is highly malicious to the which would not be a should it in the chilling system, but it tardily leaks finished the tubes its housed in. For a chilling to acquisition, this gas needs superior up every gathering.

These two factors unparalleled should measure bells with citizens. Luckily there is a utterly earthy and chemical liberal set in a modern takeout car air conditioner that not cold feather your car’s upcountry, but you can postulate it with you wherever you go.

The healthiness usage of these intelligent machines comes in at a 12-volt compel, which accidentally can be elevated with a unique movable solar charger or re batteries. Consider this runty life penury with the fuel-consuming fetus in your car and you too faculty make the constructive upshot this can fuck.

The movable posture contains no noxious gasses as it functions using unqualified . The of facility evaporation drives the . This cognition leaves no bruising fumes or by products equivalent eat gasses that colly the region.

It seems you cannot go unjust choosing this cell as the viridity secondary to taped air conditioners.

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You can find more information about air conditioners at http://www.portablecarairconditioner.net, where you can read about portable car air condtioner.

 

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