I PEDAL AND RECHARGE. FREEDOM AND AUTONOMY
An uphill road, a downhill stretch and the battery recharges.
The theme of autonomy is a hot topic in the world of e-bikes. We pedal, pedal; but how much? And if I end up without battery?
“By golly my bike weighs over 20 Kg …”
That’s how things are, we just add to it! This and other comments have led us to tackle the theme, of course from our point of view or rather, with our assisted pedal bike: the “H” Hybrid.
“Why do you say ‘our’?”
Because it’s good for us to talk about what we do and test.
“And what have you done, just to understand?”
A good test uphill and downhill!
In the next few lines, we’ll tell you something about one of the many tests we’ve been doing since the start of the collaboration between Mopbike and Zehus – Politecnico (Engineering School) of Milan.
A relationship that has consolidated over time thanks to these ongoing exchanges of information and opinions.
The data we collect are transferred to the Milan start-up so that they can use them to develop and evolve the project.
Hours on the saddle, hours on the phone, hours at the PC lab and eyes on the smartphone. One word: test.
“Test? What do you mean by this word?”
Surely not just pedaling. No, that’s part of everyday life.
Test first means defining a goal; collecting data with the systems on the bicycle and additional external systems; it means downloading information and analyzing the collected data; finally producing a result. From the results we start to reason.
setting up the bike test
“But why are you doing all that mess?”
The reason is simple: we like to “break things up”. In the sense of stressing the component and the medium to understand what are the limits and the possible improvement margins.
The objective that we have chosen is that of testing the autonomy of the “H” Hybrid uphill and downhill. In other words an analysis/test of the charging system in a mixed path.
The main point is to understand how far we can push the “H” Hybrid Mopbike in the cyclotourism.
A cyclotourist who faces various types of road, faces both hills and slopes and we think that the engine in this situation can help achieve more ambitious goals such as pedaling with less effort and more serenity.
Let’s start from the path, which is important to understand the result;
Then we will examine the behavior in action, the results and the features of the project
We have chosen a typical stretch of a hilly road. A path used also by cyclists to train and do that repeatedly to represent a segment recorded in the various smartphone applications.
Let’s examine some features of the path:
A 2.1 km uphill climb with an average slope of 4% and touching sometimes 7%. A total length of 4.2 kilometers by considering the stretch to climb and to descend.
IT’S TIME TO PEDAL
First of all, let’s start with some pedals to turn on the engine and turn on the connection to the smartphone.
Let’s access the Zehus application and set the Bike+ mode.
Everything is ready. Let’s start.
We go back on the saddle and walk a few hundred meters to find out if everything works.
The battery charge level is 87%.
Let’s zero the data and start!
The pedal immediately feels fluid and well-assisted. We navigate the first kilometer uphill without any problems. The average uphill speed is over 16 km / h
By pedaling to the top of the road, the energy charge has dropped to 68%.
Without stopping, we begin the descent to return to the starting point. During the 2.1 kilometers downhill we use the regenerative brake by pedaling occasionally backwards in order to intensify the level of electricity to be stored in the battery pack.
We pay attention not to exceed 36 km/h as the system does not recharge anymore over this speed.
When we are back at the starting point, we check the battery charge level: the display shows 83%.
We have almost recovered the battery consumption by travelling just 4.1 kilometers with a difference in altitude of 81 meters.
We have consumed 22% of the battery and recovered 17%.
Yes! Recovered! This is the beauty of this bycicle, that it can be recharged by using it!
The data are not absolute but depend on various variables that come into play and, as we will see in other tests, we have been able to bring back the battery level to the starting state.
The variables are the uphill speed, when and how much the regenerative brake is used, the weight of the cyclist.
By using as a constant the same path and the same Bike + settings.
“But then are you saying that I do not have to charge the battery again?”
The answer is almost certainly Yes:
Under these specific conditions of use, the test enabled us to understand the “H” Hybrid recharge system on the field. Of course there is also the possibility of recharging the battery like any other pedal-assisted bicycle. Charging can be done with the supplied standard power supply unit with a 220V wall outlet.
By using the application, you will be able to watch the battery consumption, uphill, and the recharge, downhill, in real time.
The variables are different. The constants that are important in this “H” Hybrid test are:
The European Directive 2002/24/EC: definition of an assisted pedaling bicycle, requires:
- the use of a motor with a nominal power of 250 Watts
- engine power gradually reduced and then stopped at 25 km/h
- engine power stopped before 25 km/h if cyclist stops pedaling
Given this premise we immediately get into the merit of the “H” Hybrid
SMART HYBRID PERFORMANCE
Frame: MOPBIKE Aluminum tailor-made*
Fork: MOPBIKE Carbon
Head Set: Semi-integrated 1″ 1/8
Trasmissione: belt Gates Carbon Drive
Motor: Hub Zehus Bike+ All in one
Gear: single speed
Crank set: Shimano Alfine Hollowtech II
Bottom Bracket: Shimano Alfine Hollowtech II
Stem: Aluminum Mopbike
Handle bar: Race
Brake lever: Aluminum
Saddle: Mopbike leather
Seat post: Aluminum/Carbon*
Wheels: Aluminum high profile
Tyres: Michelin Dynamic Sport 700×28*
Weight: 11,9 Kg
Ok guys! Now if you have questions feel free to contact us