Hello Gopal,
Thanks for your reply. I managed it with a Korean expert.
If it is not illegal, please let me know your contact point in order to reach you in future for any support.
How many days it takes for the trainings you mentioned? Is there VCE150A available for training?
Thanks

Hi,
I will give you the training for basic maintenance training & Dismantle and assemble training of this model..if you interested in india.

Mail me.

We got BT VNA VCE150A at factory and need 1 or 2 days private training for its assemble ant run it. If you know any specialist to help us, please introduce. We accept training in Europe.

Thanks
Yaghoub

Back to the original question...If you want optimal performance without losing capacity at the top of the mast, stick with the Still or the Linde. 80 volts has out performed the traditional 36 / 48 volt for several years now. however, you must do proper battery maintenance in any of these voltages if you don't, then it won't matter. Your trucks won't perform and you will end up owning more nbatteries than you want..

Any way, thse other brands are alsoran's....Go with the Linde or Still with the Jungheinrich 3rd...

In each cell your are correct but the 48 v battery has 12 more cells so the total plate surface area would be greater- this assumes both batteries have the same same amp rating per positive plate & the same total kwh & we are taking about flat plate cells vs tubular design which typically has more surface area than flat plates but has some limits & some benefits.
Lets do this so I can better understand what you have in your lifts. Go out to your fleet of sit downs & get the battery model number from a unit with 36 v battery & one with 48v & measure the battery trays length, width, height (measure height to top of lifting eye) - the model number maybe on a battery tag with a bar code or stamped in the case. The model will be in this format - for 36 volt battery 18-XX(x)-yy; 28 volt - 24-xx(x)-yy. If you cannot find it on the case - lift the top cover, disconnect the battery, remove all rings, watches, were eye protection & don't touch any of that white stuff you may see - that has no street value but it will eat the heck out of anything with cotton - it is an acid sulfate. Find the red cable, go to where it is connect to the battery, remove the (or more than one) plastic inter cell connector cap(s) closest to the pos. cable. The model number should be stamped on top of one of the inner cell connectors. If you can't find it then teh connectors may have been replaced & teh tech - did not restamp the connector (supposed to - but it is 2011).
Another idea get a hold of your forklift dealer rep & have him bring in the rep from the battery company that made the batteries & request he bring in literature & other information on batteries for your better understanding - you'll get enough information that will challenge the number of pages in A.H.'s book "Mein Kampf" (at one time it was rated the worlds largest book). It has been my observation, that few forklift guys understand batteries & the battery guy is like a "Maytag" rep. they luv an audience & Q & A sessions - they can get way too technical at times but tell him you don't want to know how to make one just a better understanding of what they are & what options are available to make your job easier. And if they don't have let's say a tubular battery or other options - like MF, etc. they will tell you nuttin' but bad about them Heck you might get a lunch out of the deal.
Just "Free Food & Info For Thought"

PS - I was a lift truck sales/marketing guy for several decades (like 4+1 year) & I wanted to know about batteries & options so I could better consult with my prospects & customers - I am a tech oriented guy - degree in engineering (never engineered one thing for a company I worked for only to get a grade in college or some "back yard engineering).

I guess then that if you took the biggest 48 volt and 36 volt battery that would fit in the dimensions of your tray, the 36 volt would have more plate area due to less outer cell material, correct?

chubhill,


1. no doubt you are right, but you need to go by the cell amps per positive plates & the total kwh rating of the battery. Going by the tray size does not give you an apples to apples comparison. See tray sizes are for the most part common in height today (in the 60's this was not true) which means the battery cells are common in height. Battery manufactures can & do vary the height of the cell plates (changing the amount of plate surface) that go into to cell "can" to produce various amp/positive plate & greater kwh - sorta like engines in a car use the same engine block play with the head design, camshaft, cylinder bore, etc & create higher horsepower (which is equivalent to a kwh rating). The greater the horse power the greater the cost (sell price) of the engine - you pay for more power.

2. 48 volts have a lower amph/hr rating, great less heat (resistance) so the dual voltage motors can turn faster (~33% faster). Heat is an enemy of a motor & electronic devise - less brush wear, less contactor tip wear. If your 48v units are moving more loads by being faster per battery charge than the 36v - then they are more productive & costs you company less per load moved. That is a good thing - check it out at your end.

Johnr, if you say the spec is on than I take your word for it. I have a fleet of dual voltage trucks, and in the same application, same truck model, the 36 volt batteries last on average about 1 to 1 1/2 hours longer than the 48 volt batteries within the same tray spec. The only difference being the 48 volt trucks outpace the 36's. Why is that?

chubil
As we say on the East Coast "That Dog Don't Hunt".
Let's take two industrial batteries (a 36v & a 48v - flat plate - lead acid & they both meet the minimum weight required for the lift truck. These batteries are very common to a 5k sit down rider electric lift to use as an example to illustrate what I mean-

A. 18-85-24 - 36v, 85 amps/pos plate-1020 amp hr@ 6 hour rate - 23 plates/cell - 35.8kwH

B. 24-85-19 - 48v, 85 amps/pos plate-765 amp hr@ 6 hour rate - 19 plates/cell - 35.8kwH

Both batteries have the same kwH rating or equal amounts of power to be consumed and same number of positive plats/cell - this gives us an apples to apples comparison - no funny stuff with tubular batteries, changing amps per positive plate, etc, etc.
1. A 48 volt battery has 24 cells & a 36 volt battery has 18 cells or the 48 volt battery has 33% (or 6 cells more) MORE cells than the 36 volt battery.
2. The 48 volt battery has 17% LESS plates per cell than the 36 volt battery or 4 less.
3. The 48 volt battery has a total of 456 plates (24 x 19), While the 36 volt battery has 414 total number of plates (18 x 23)

The forklift run time is based on kwH usage - you pay your home electrical bill on the kwHs you consume to power all those electrical think in your home - some 110/120v some 220/240volt. You recharge the battery with kwH use.age. A battery stores that kwH capability to be consumed.

So in this example less plates actually produces the same kwH rating but there is more amperage draw (or heat) with the 36 volt system.

Fernandes - im gonna always say the VCE is the best option as I work for BT.

Go have a look at a VCE working for a living & ask the people using it what they think.

Johr it is simple, within the same area a 36 volt battery has more surface area than a 48 volt. the more plate you can put into the equation the longer the run time.

Yes I know that the battery duration depends of variety of factors.
We have an offer for a battery with 48V an 1245Ah. What you think of this?

We have aisles with 55 meters of lenght and 9 metters of heigth. The machine will lift a maximum of 2200 lbs at 9 metters and have a residual capacity of 3300lbs!

We will buy just one machine, so the demo is out of chance.
We have the opportunity to see them in other factory. And maybe be we will do that!

We already have one machine of other brand working with rail guidance and we will keep the same system to avoid unnecessary extra costs of setup.

So in your opinion the VCE150 is good buy? Although slightly more expensive?

If you pick the correct AH battery the VCE 150 can easily do 14 hours on one charge.

It all comes down to:

How many lifting / lowering operations.
How far is the truck traveling between & also up / down the aisles.
The weight you are lifting.

You can also get double accumulators on the higher lift VCE.

They have been around for a good long while now & BT have got the bugs ironed out, if there maintained & looked after correctly there pretty much bulletproof & will just keep on going.

How many machines are you looking to buy? have you asked if a demo VCE machine is available for a on site trial?

Are you going for wire guidance or guide rails?

Yes I knew that VCE has one hydraulic accumulator!

BT gives a warranty of 14h in operation with one battery. Could be this possible? This is the more expensive machine...
Forkingabout,do you think that it is a good option?

chubhill,
why do you say a 36 v battery will give you long run time than a 48 v? As long as the kwh rating (power consumption capability) of each battery is the same the run time should be the same and it has been my experience that a 36v & 48v battery of the same battery box size & weight will have comparable kwh ratings. Plus, the cost difference (36v to 48v) in batteries & chargers is negligible -~$100 for increased performance/productivity.
The lower the voltage the higher the amp draw (or heat - an enemy of motors, electrical & solid state devises.
80 volts systems & batteries draw even less amps.