VAE experience, practical electric bicycle with trailer

Cars, buses, bicycles, electric airplanes: all electric transportation that exist. Conversion, engines and electric drives for transport ...
User avatar
Macro
Econologue expert
Econologue expert
posts: 6459
Registration: 04/12/08, 14:34
x 1610




by Macro » 16/05/11, 08:28

Christophe wrote:Macro you should be prohibited from participating in the sub forum electric transport ... :|


Well, you see ...

I just advised you to roll the hood open to see if the problem persisted.

Then I guess you are not crazy this bike is not used in the rain : Cheesy: And even if like me you are a big worshiper of the water which falls from the sky and well you will avoid for once going to dance below with your honorable biguadin solar ... (and then when it rains it is less hot so you can close the hood)

And yes, as Citro says so well, you are pioneers of electropropulsion; you have to be, at the very least, engineer level to be able to move around reliably ...
As were the smoking drivers of the 30s

On my kid's electric scooter there were two batterries, one of which slammed a few charges after the start of this kind of mess ...
0 x
Christophe
Moderator
Moderator
posts: 79118
Registration: 10/02/03, 14:06
Location: Greenhouse planet
x 10973




by Christophe » 16/05/11, 12:53

I drove at night, therefore colder: that does not change the problem: it cuts during excessive efforts even after less than 2km after a full recharge ...

On the other hand in the same slope, and whatever the state of charge: if I increase "the human effort", that does not cut!

The harder you pedal, the less intensity is sent to the motor for the same RPM speed, right?

A priori, it is therefore indeed a problem of overcurrent requested from the battery which therefore goes under voltage and "automatic cut" threshold ...

So there, by pushing more on the legs, I don't really see what to do ...

Well yes the Ardennes is not flat ...
0 x
User avatar
Macro
Econologue expert
Econologue expert
posts: 6459
Registration: 04/12/08, 14:34
x 1610




by Macro » 16/05/11, 13:10

The old adage is therefore verified
The more I pedal slower: The less I advance faster ...

As by giving simulations of cuts you manage to relaunch the thing I think that it is simply a maximum load tempo ...
0 x
dirk pitt
Econologue expert
Econologue expert
posts: 2081
Registration: 10/01/08, 14:16
Location: isere
x 68




by dirk pitt » 16/05/11, 19:01

since it happens to you even with a weakly discharged battery, there is a good chance that it is a significant imbalance between the cells of your battery.
the "usual" cut that you knew is made by the motor controller which cuts on a general low voltage.
what you have here is a cut by the BMS on detection of a low voltage of a single cell. the BMS then does the equivalent of a wild disconnection of the battery or the necessary OFF-ON.

the only solution: open the battery, measure the elements one by one and find the one that is too low. then recharge the battery normally with the original charger then make a complement on the element (s) too low by means of an external power supply connected directly to the element with wire grips. this is the method I usually use when the BMS does not have a balancing function.
0 x
Image
Click my signature
dedeleco
Econologue expert
Econologue expert
posts: 9211
Registration: 16/01/10, 01:19
x 10




by dedeleco » 16/05/11, 20:21

dirk pitt is probably right, but it can only be an imbalance in the internal resistance of the elements, which appears in voltage only at high current and little in no-load voltage, as we sometimes see on dead batteries or rechargeable batteries at end of life, almost good voltage, but collapse as soon as a good current is requested.
So measure these voltages at high current also for each element.
Well yes the Ardennes is not flat ...

but very good for doing the intense exercise necessary to improve your health !!!
0 x
Christophe
Moderator
Moderator
posts: 79118
Registration: 10/02/03, 14:06
Location: Greenhouse planet
x 10973




by Christophe » 17/05/11, 15:03

dirk pitt wrote:the only solution: open the battery, measure the elements one by one and find the one that is too low. then recharge the battery normally with the original charger then make a complement on the element (s) too low by means of an external power supply connected directly to the element with wire grips. this is the method I usually use when the BMS does not have a balancing function.


Thank you for the advice, it's done, I took the opportunity to make a new subject: disassembly and diagnosis of a LiIon battery of an electric bike

We continue there about this "diagnosis"
0 x
jean.caissepas
I posted 500 messages!
I posted 500 messages!
posts: 660
Registration: 01/12/09, 00:20
Location: R.alpes
x 423

Re: VAE experience, functional electric bike with trailer




by jean.caissepas » 22/08/12, 14:20

Seen this afternoon at the corner carriage:
Greencity Monte Carlo at 428 € (approximately) on promotion, instead of 565.

For those interested, the reliability remains to be seen (I had another GreenCity which had its frame split 3 weeks before the end of the warranty, and it seems to me that Christophe had battery problems)

A+
0 x
Past habits must change,
because the future must not die.
User avatar
Dame Andean
I discovered econologic
I discovered econologic
posts: 7
Registration: 08/02/15, 11:57




by Dame Andean » 08/02/15, 12:29

Hello,

I discover the forum econology today, looking for info on the idea of ​​an electric bike with trailer.
I know that the subject has been sleeping for a long time, but since this is really my subject of questioning, I allow myself to wake him up ...

To locate, I work for the moment in classic bike mode (Dutch bike type) and public transport ... The bike has taken a bigger place in my transport for about 1 year ... I would like to have better mobility without necessarily think of a car (budget question, and also, I would like to believe that it is possible to operate without a car :-)). I would like to be able to make longer distances (with 2 batteries for example?), To make medium distances without being tired by the journey, to carry heavier things, etc. (a priori, about 30kg).

My questions are addressed in particular to Christophe, since I could see that he had tested the options that interest me ... but also to all those who have tested :-).

Do those of you who have chosen the trailer-electric bike combination still use it? are you still happy with it?
is it doable with the mottrix kit (which I saw in another subject)?
Knowing that I am not a featherweight and that I would like to carry things a little heavy (like grain for hens for example ...), would it be a good plan my bike + kit mottrix + trailer?
Advice on buying a trailer?

[I will no doubt also explore other areas of the forum which seems really rich to me, but for the moment, the mobility question becomes crucial :-)]
0 x
User avatar
I Citro
Econologue expert
Econologue expert
posts: 5129
Registration: 08/03/06, 13:26
Location: Bordeaux
x 11




by I Citro » 08/02/15, 20:16

Hello and welcome to the forum Dame Andean. :D

You did very well to reactivate this subject to which I was subscribed.
Indeed, I am really starting to experience the VAE which I have rented the principle for years without having been further than trying various models during presentations and shows ...

Activist for alternative transport, I fully understand your approach.

I suggest a few tracks and share my point of view for your project.

The Motrix kit is not a bad product but it is limited by its design ... It wears the front tire and skates as soon as the road is wet, which makes it inoperative, it is contrary to the principle of wanting to use the cycling in all weather ...

To carry out the transport of goods, there are 2 relevant solutions:
- The cargo bike with loading platform in front of the cyclist or long luggage rack behind the cyclist, there are even models with trunk like the d-ozmoz products.
- the cargo trailer, ideally in a motorized version like the excellent version offered by cycloboost.

I also remind you that bicycle batteries do not appreciate the cold and lose a lot of capacity in winter (therefore autonomy).
In summer the capacity returns to its optimum if the batteries have not been mistreated in winter (do not charge the batteries in negative temperature).
The electric bike with its removable battery is therefore very practical because you can charge the battery warm in its housing instead of charging it in an unheated room (outdoors, in a garage ...).
0 x
User avatar
Remundo
Moderator
Moderator
posts: 15992
Registration: 15/10/07, 16:05
Location: Clermont Ferrand
x 5188




by Remundo » 08/02/15, 20:50

pretty fabulous, the motorized bike trailer for ... € 1.

for that price, you can have a good used car, or a full options subscription in a gym (to build muscle ... your legs).

Lack more than the price of a new VAE and then you have a nice scooter for the same price.
0 x
Image

 


  • Similar topics
    Replies
    views
    Last message

Back to "Electric transport: cars, bicycles, public transport, planes ..."

Who is online ?

Users browsing this forum : sicetaitsimple and 217 guests