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Posted on 13 January 2015 at 01:10 am (CET)
Category: Batteries, Controller
Posted on 13 January 2015 at 01:10 am (CET)
Category: Batteries, Controller

The problem I had yesterday where no power was going to the motor moving forward is already solved. The controller just needed a bit more voltage, the 12V battery was not enough. Today I connected the whole battery pack to the controller and tried again. The motor always gets power now, moving forward and in reverse. For the rest I also had no problems anymore, everything's working perfectly now.

E-Streetquad High voltage on controller


Since there was almost 80V present now I changed the settings of the controller again to see how much power would come from the motor. Tested again with the wheels off the ground and I was very surprised. I only still had 1/8th of the available power but I could already feel really good how strong the motor is. More power I won't test with the wheels off the ground, this will happen during the test ride soon. The coming days I'll be preparing everything for that. So it's going to be very exciting.

Posted on 12 January 2015 at 06:35 pm (CET)
Posted on 12 January 2015 at 06:35 pm (CET)

It's time for another new update.

The past few days I've been busy connecting all of the battery cells to eachother. It all went well, for extra safety I already isolated all of the tools with some tape. For the rest you just have to stay very focused.

E-Streetquad Battery cells and BMS connected


But that's not all yet, I also started on the BMS (Battery Management System).

E-Streetquad Battery cells and BMS connected


First I made all of the wires exactly to size.

E-Streetquad Battery cells and BMS connected


Then I connected them all to the battery cells and to eachother. Thought it'd be a lot of work but it wasn't all that bad. It was the first time something actually took less time than I expected, usually it always takes longer. They're also connected inbetween the battery boxes, this was actually the hardest since at one part I had to push 4 wires through that wire loom. The size I used actually is for only 3 wires. But it all went fine anyway.

E-Streetquad Battery cells and BMS connected


Looks pretty nice too. The green LED's show that they're connected properly and that the battery cell is at the right level.

E-Streetquad Battery cells and BMS connected


E-Streetquad Battery cells and BMS connected


In the dark it also looks nice with all of those LED's. Just too bad that you won't see any of it anymore once the battery boxes are closed.

E-Streetquad Battery cells and BMS connected


I also connected the throttle now. I used 2 resistors for this and one extra wire, these are again for the BMS. These will make sure that there's not much power available anymore once the battery cells drop below a certain level. This way you won't immediately destroy the battery cells while still being able to get off the road safely.

E-Streetquad Battery cells and BMS connected


E-Streetquad Battery cells and BMS connected


Also placed all of the fuses to be able to test the 12V system. Meanwhile I've already broken one and replaced it, apparently the contactors needed a little more power.

E-Streetquad Battery cells and BMS connected


And I can already say that the 12V system is working perfectly. I just had to make a small modification with a relais, for the rest everything seems to be fine. I just have a weird problem where the controller sometimes doesn't give any power the motor after I let it run in reverse and then forward again. Could be that there's just not enough voltage since everything was connected to a 12V battery. Just have to connect the wires to the controller again and then I can try with almost 80V, see if it works better then.

Posted on 5 January 2015 at 01:43 am (CET)
Posted on 5 January 2015 at 01:43 am (CET)

First off I'd like to wish all readers a happy new year. Hopefully 2015 will be a very good year for all of you.

The first update this year and it already starts good. I was able to completely finish the top case this weekend.

The protective covers were all sprayed black. I did this myself and it actually still turned out pretty nice.

E-Streetquad Everything in top case connected and covered


I still want to be able to detach the plates so I bought some connectors again for all of the wires. The top case itself is already waterproof so I don't need waterproof connectors for this. First I put all of the contacts on the wires.

E-Streetquad Everything in top case connected and covered


With the connectors on.

E-Streetquad Everything in top case connected and covered


Since I made a complete new wire harness I wanted to add some extra safety. I bought a few fuse boxes which all seperate circuits are fused with. Was a lot of work to connect this all but it'll be very nice when it's in use.

E-Streetquad Everything in top case connected and covered


The wires between the DC-DC converter, 12V battery and wire harness were also very fun to make exactly to size. The + wire of the DC-DC converter also has a seperate fuse.

E-Streetquad Everything in top case connected and covered


E-Streetquad Everything in top case connected and covered


Attached everything to the protective cover. Now you know what all the holes I made in it are actually for.

E-Streetquad Everything in top case connected and covered


Was quite some work to get everything connected before I could attach the plate but finally it looks very nice now.

E-Streetquad Everything in top case connected and covered


DC-DC converter attached and connected.

E-Streetquad Everything in top case connected and covered


And another protective cover on there.

E-Streetquad Everything in top case connected and covered


The 12V battery I won't connect for now. I did this for a short moment but then I saw that the DC-DC converter actually draws a little power. So I can only connect it once I have the whole battery pack connected so the DC-DC converter can keep the 12V battery charged. That's what I'll be busy with the coming days. Will be a bit more exciting since I won't be working with 12V anymore but 72V.

Posted on 30 December 2014 at 11:52 pm (CET)
Posted on 30 December 2014 at 11:52 pm (CET)

Just a quick update before the end of the year. I continued with the wiring again. The wire harness itself is pretty much done. Just still had to connect everything at the rear to the controller and in the top case.

E-Streetquad Controller connected and more wires to top case


E-Streetquad Controller connected and more wires to top case


On the controller I've done it already, everything's connected there now.

E-Streetquad Controller connected and more wires to top case


In the top case I removed the protective plate again and made some modifications. The round holes are for cable pass through and some switches. What the bigger holes in the front side are for I'll show you in a few days once the plates are sprayed and everything's on there.

E-Streetquad Controller connected and more wires to top case


The wires to the top case are also all in there already, just still have to connect them all.

E-Streetquad Controller connected and more wires to top case


E-Streetquad Controller connected and more wires to top case


And the thicker high voltage wires for the DC-DC converter are also ready to be connected.

E-Streetquad Controller connected and more wires to top case


E-Streetquad Controller connected and more wires to top case


Next year there'll be more updates again. January will be very fun, that's what I can tell already.

Posted on 19 December 2014 at 12:11 am (CET)
Category: Charger, Wiring (12V)
Posted on 19 December 2014 at 12:11 am (CET)
Category: Charger, Wiring (12V)

Past few days I was able to do a bit more again. The charge inlet is all connected now. Just still have to find a way to seal the rubber at the bottom.

E-Streetquad Charge inlet connected and continued with wire harness


E-Streetquad Charge inlet connected and continued with wire harness


E-Streetquad Charge inlet connected and continued with wire harness


I also still continued with the wire harness, there are quite a few wires added again and everything that had to be combined is already soldered.

E-Streetquad Charge inlet connected and continued with wire harness


E-Streetquad Charge inlet connected and continued with wire harness


The wire harness is almost completely done for a test ride now. Just still have to add the wires for the lighting after that. But I'm still waiting on the new wires that I ordered, untill I get them I can't really continue with it.