Case battery with everything one would need

[Arbol]

What do you think about the combination for case battery suggested at:

http://endless-sphere.com/forums/viewtopic.php?f=31&t=50015&p=851403#p851403

which would satisfy many positive requirements:

- Battery centered at the bike
- Case holding battery and controller
- Good quality cells (Konion)
- Good controller, S06S (unlike the S06P which I believe d8veh does not like in combination with a Q100)

Of course, buying the BMSbattery pack would be easier, but I wonder if the 18650 cells inside are good enough.

 

[Deleted member 4366]

I have exactly that battery and controller. For a low powered sensorless motor, it's a good combination, but, like I said, Q100s don't run very well sensorless.

It's very difficult to make your own battery using that case unless you have the right spot-welder to join the cells. This might give you some idea of why:

http://www.pedelecs.co.uk/forum/threads/bottle-battery-repair.15289/

I've just seen from your ES post that they offer the S0^S as an alternative. I think that's new. The 06S will be OK, ut I struggled to get all my connectors in without the large hall sensor one. It probably needs a bit of patience and dexterity.

 

[Arbol]

Thanks d8veh.

I do not fully understand your comment:

"I've just seen from your ES post that they offer the S0^S as an alternative. I think that's new. The 06S will be OK, ut I struggled to get all my connectors in without the large hall sensor one. It probably needs a bit of patience and dexterity."

Do you think then that with an 06S the idea is a good one? Or the problem "to get all my connectors in" will remain?

My second question is regarding the quality of the cells. Are they good enough for a Q100C? BMSBattery sometimes say a max continuous amperage of 10A, sometimes of 15A. 15A continuous would be OK (the 06S is of 14A) but 10A would not be great.

 

[Deleted member 4366]

When I installed mine, it took a long time and many tries to get all the connectors tucked up inside the controller compartment so that i could screw the controller into the compartment. The S06S has an additional large connector for the hall sensors. It must be possible. somehow.

The battery has the correct rating for a Q100. The controller is encapsulated, so you can't change the current from its standard 15 amps or whatever it's been set to.

When you use a 201 rpm or 260 rpm Q100, the only time it will go over 10amps is during acceleration from low speed and during hill-climbing, Once you get up to speed, the current will reduce, Your average will be much less than 10 amps.

 

[Arbol]

Thanks, d8veh. Wow, just so difficult to find a combination of battery, motor and controller that just satisfies the conditions:

- Battery centered at the bike
- Case holding battery and controller
- Good quality cells
- Good controller

d8veh, please correct me if I am wrong, but when I read you, I tend to believe that your preferred combination is a Bafang CST with a S12S, is that right?

I am asking this because I could bypass trying to buy a full package satisfying all my requirements (it does not exist, I believe) and just buy a good motor and controller, put a rear basket and ask Schwibsi a very flat battery with his Konions, and just put a cover on top of it, to disguise the fact there are cells at the bottom of the basket. I would put the controller there too.

What do you think? The battery would not be centered, but at least this combo would satisfy my other requirements.

 

[Deleted member 4366]

The Bafanf CST is a totally different motor. Its a brute by comparison. It's much heavier and needs a heavier battery and a secure installation in a strong frame. Perfect for a MTB.

A lot of people buy kits from Cycotricity and 8Funbike, and they're perfectly happy with them at 18mph max. Once you have special requirements, you have to juggle and balance different parameters and characteristics. To every plus, there's a minus. There's never an exact answer to what you want, and you can get the same thing in a number of different ways. Sometimes you have to stand back and think about what you are trying to achieve first. Make a list of key requirements. Then you can plan the best way to achieve those objectives. If you start with a bike that's designed with specific limited objectives, you're always going to have problems to change those objectives.

 

[Arbol]

Mmm yes, you are right, I have stepped backed and thought what do I want / need:

- I do NOT need urban usage. I have thought about this, and it is not wise to use an electrified bike in Barcelona. Risk of being stolen is too high. As a consequence, I really do not need to hide the battery and controller
- I need help for long trips. So far, I have been biking to some beautiful places nearby, but there is always the limitation this area is quite hilly, and sometimes I can barely move ahead due to strong slopes (I weight 73kg and I am relatively fit) and sometimes the wind (I live close to the sea). But I want to do sport, so I "only" need help from the motor, I want to sweat and exercise. But of course, it cannot be a too weak motor, because some hills are terrifying here
- I need a high autonomy (so high efficiency) and robustness (I do not like to tinker much, I prefer plug & play such that it just works)

What do you think about these requirements?