Search found 18 matches

by nethern
Aug 05 2018 7:26am
Forum: E-Bike Non-hub Motor Drives
Topic: SRaaE(sur-ron as an enduro bike)- my take on sur ron
Replies: 4
Views: 942

SRaaE(sur-ron as an enduro bike)- my take on sur ron

Hvae surron for a while, like this bike. I saw there are not many riding review about the bike from dirtbike rider perspective. Want to add some spice to the pile. About me I just started to ride enduro dirtbike 1.5 years ago. My skill is only at beginner's level. I was amazed by how physical demand...
by nethern
Jul 21 2018 7:39am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3838
Views: 278336

Re: Sur-Ron - New Mid drive Bike

Did someone do something about the chain noisy? I realized the chain is touching the bolts on the front spocket. Need A smaller head bolt? Or a bigger front spocket?
by nethern
Jul 04 2018 6:28pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3838
Views: 278336

Re: Sur-Ron - New Mid drive Bike

They also have this interesting mud guard for sale on the same jd site around AU$20
Image
by nethern
Jul 04 2018 6:23pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3838
Views: 278336

Re: Sur-Ron - New Mid drive Bike

Speak of skid plate, sur-ron starts to have a new one for sale on there jd site https://item.m.jd.com/product/23459722926.html Its aluminum but thickness unknown. Au$14 https://m.360buyimg.com/mobilecms/s750x750_jfs/t15529/276/678670165/446529/e101f460/5a39fa65Nba70db5f.png!q80.jpg https://img11.360...
by nethern
Jun 03 2018 11:10pm
Forum: Items for Sale - New
Topic: [AUSTRALIA] Sur-Ron Light Bee / Fire Fly - Mid drive ebike
Replies: 152
Views: 20094

Re: [AUSTRALIA] Sur-Ron Light Bee / Fire Fly - Mid drive ebike

How will it different from the oset24?
Image

Say if I want to buy a e-trial , future Sur Ron or oset ?
Any idea?
by nethern
Jun 03 2018 4:48am
Forum: Items for Sale - New
Topic: [AUSTRALIA] Sur-Ron Light Bee / Fire Fly - Mid drive ebike
Replies: 152
Views: 20094

Re: [AUSTRALIA] Sur-Ron Light Bee / Fire Fly - Mid drive ebike

Can this bike be used as trial bike? How s the power delivery? Does it come with sinwave controller?
by nethern
Mar 20 2018 6:31pm
Forum: Battery Technology
Topic: Well my first built pack almost died in a flame
Replies: 7
Views: 660

Re: Well my first built pack almost died in a flame

A common problem with DIY packs is not putting insulators under the nickel where it crosses the edge of the positive ends of cells. Without those, pressing on the nickel strips with your probes could cause them to touch damaged areas of shrinkwrap and then the actual cell itself, shorting across te...
by nethern
Mar 20 2018 6:23pm
Forum: Battery Technology
Topic: Well my first built pack almost died in a flame
Replies: 7
Views: 660

Re: Well my first built pack almost died in a flame

It s 15s4p. Planned to build two of them and parrallel connect to 8p.

I uses vtc6. not sure if genuine but looks like genuine - with quality packing for each cell. not cheap for the two packs
by nethern
Mar 20 2018 6:54am
Forum: Battery Technology
Topic: DIY battery pack bms question
Replies: 13
Views: 1179

Re: DIY battery pack bms question

i have put It on the bike for some rides. initially It is ok. But the range is not as far as iexpected. Since my Charger is 13s, i am not sure that causes the short mile rang or Its due to the damaged cells there. I will try and see what will happen.
by nethern
Mar 20 2018 6:51am
Forum: Battery Technology
Topic: Well my first built pack almost died in a flame
Replies: 7
Views: 660

Re: Well my first built pack almost died in a flame

Yeah, the battery pack worked good to me after the initial drain from that post. Looks like i need to rebuild the battery with insulator and new bms. I need to do It anyway because 1)i need to fit in a different shape of bag - rectangle one. 2) the current bms has separated charge/discharge port wit...
by nethern
Mar 20 2018 2:32am
Forum: Battery Technology
Topic: Well my first built pack almost died in a flame
Replies: 7
Views: 660

Well my first built pack almost died in a flame

I finish riding from work. The juice was almost out. I took It out to meter each cell to see is any one had problem because i realize there had been a sudden power lost during the ride. I put It on the table, taking multimeter to test the first group cells. I realised the first group that connects t...
by nethern
Feb 09 2018 12:36am
Forum: Battery Technology
Topic: DIY battery pack bms question
Replies: 13
Views: 1179

Re: DIY battery pack bms question

Sorry about not mentioning i did manual charge all to 3.4, before reconnect. I Let It sit for a while at from 48.7v to 46.2v in two days. Then Charged it. It is now at 54.4v,because i am yet to buy a 14s Charger. That s 13s i used Should i worry about the volt drop in the two days? or It s normal ra...
by nethern
Feb 06 2018 2:25am
Forum: Battery Technology
Topic: DIY battery pack bms question
Replies: 13
Views: 1179

Re: DIY battery pack bms question

i reconnect the wire correctly now. It seems fine. i Got right volt from discharge end and the bms is not hot at all This time. I thought there would be fire for a moment.

i ll watch It for a while.
by nethern
Feb 05 2018 2:11am
Forum: Battery Technology
Topic: DIY battery pack bms question
Replies: 13
Views: 1179

Re: DIY battery pack bms question

Oh! i Did Connect two of the balance wire the other way around. It has drain two of the groups to 2.2. Luck i disconnect the balance plug to the bms while waiting for the reply here.

Thanks for the reminder there
by nethern
Feb 04 2018 2:08am
Forum: Battery Technology
Topic: Voltage difference BMS vs direct from battery
Replies: 6
Views: 583

Re: Voltage difference BMS vs direct from battery

i am having similar issue on my similar build. The bms is quite hot. seems draining batteries to heat for some reason. i check the connection and all correct. currently unplug bms and found some serie group were drain but others stays same.

Have you found the cause of the issue?
by nethern
Feb 03 2018 7:44pm
Forum: Battery Technology
Topic: DIY battery pack bms question
Replies: 13
Views: 1179

DIY battery pack bms question

Hi I am building a 14s battery pack with BSM bought here https://www.aliexpress.com/item/High-quality-14S-18650-lithium-battery-BMS-for-electric-bike-lithium-battery-with-20A-continuous-discharge/2030986292.html?spm=a2g0s.9042311.0.0.YcU2Cy. After I connected all of the balance wires, the bms start ...