wasp

as a follow up my bats are going out of balance...
now lvc kicked in bat 1 15.64v bat 2 16.99v
i'll rewire for c- tomorrow...to tired from pedaling(lol)

peace wasp

SeizeTech

Not with the switch off, but with my hands off the throttle and my son in a bike trailer behind me.

It was not the same fun experience that I like about the schwinn Izip, and I personally I think I can only manage it if I go slow and keep it away from moderate inclines.

My guess is the batteries will die about 20 minutes from work. But I won't really know until I try.

Solar.110mb

I would say that pedaling on a Schwinn Izip should be a lot easier than a non-electric mountain bike with knobby tires. In fact I know this is true since I compared it on a little hill. The extra weight on an Izip with those great smooth road tires is still easier to pedal without assist than my mountain bike with those darn knobby tires.

SeizeTech

How are you charging them, with the yardworks charger?

SeizeTech

Here's a good website on how to charge a lithium ion battery.

https://www.batteryuniversity.com/partone-12.htm

SeizeTech

I started out this mornig with the intent to ride my schwinn to work on it's first 26km trip. But, unfortunately, 20 minutes into the trip, one of the front crank arms fell off because the kid at canadian tire didn't tighten it properly. Anyways, I got it back together this evening, and put some medium strength loctite on it just to make sure.

I think in the first 20 minutes, I only had about 3 minutes of motor time, because I was limiting my useage to starts at an intersection, and short steep inclines. I'm pretty optimistic that 2 battery packs will do it for me.

wasp

it's funny you mention that i had mine tightened today as well
no loctite and it's loose again...
keep us posted

peace wasp

SeizeTech

Hi wasp, did the info on charging Lithium ion prove useful?

wasp

it was enlightning but from 2001...
i believe you need to use the charging negative termanal on bats or the cells(5)
will not balance...it's the way they were meant to be charged
i still haven't changed my wiring yet....i'll wait and see if it damages them
there under warrenty anyways...

peace wasp

toyfountain

Wasp, I don't think they are unbalanced. Maybe I'm completely wrong since I'm still learning about this stuff. The balancing is usually meant for the individual cells in the packs. The lvc kicked in to the weakest pack (#1) and shut it off as expected at 15.5V. Doing this probably cut your series circuit since the other pack which was fine at 16.9 v was then isolated. If pack #1 was cut but allowed the current to pass through the system voltage dropped to 16.99V. The bikes controller lvc surely kicked in then. I think I once read it's set near 22V to prevent damaging the sla batts.

I went and looked at the pack at CT. I noticed it has four grooves but only three connections. The hedge trimmer had only two one on each exterior side. I forgot to look at the connectors on the charger. Does it have connectors for all three spots on the battery pack? Does it use the inside connector?

I noticed your range is between 10 to 15 km. Is this with no pedalling and what speed (45km/hr)? Have you noticed if the range increases when speed is reduced(to say 26km/hr) ? I'm considering adding this mod to my bike and would like to estimate if that would suffice for my needed range (2X15km).

SeizeTech

if there are 3 terminals, we need to find out what the third terminal is for.

wasp

my max range is at 22kmh not 45kmh , if you look closely when putting
the pack on the charger it's going on the c- pin not the-...have a look
the only reason it could be there is to charge thru bms...to keep cells balanced
for the non believers call tech support @ yardworks

peace wasp

toyfountain

thanks wasp

So it's ±15km at 22km/hr with no pedalling?

I'm not too sure what the c- pin is so to make it easier to understand
I numbered the pins from 1 to 3 on the pic of the battery.

I noticed the edge trimmer had pins 1 and 3 only while the charger seems to use pins 2 and 3. Is your wiring connected using pins 1 and 3 or 2 and 3 on your batteries? It can't be seen on your pics.

wasp

my bats are in my box so look at your bat on the plastic will show
and i don't remember the order but it shows + - c-
i'm using only + and - for discharge and charge

peace wasp

wasp

here's a better pic
https://www.proficio.ca/ebike/YardWorks-06.jpg

wasp

here some pix
https://www.proficio.ca/ebike/YardWorks-07.jpg
https://www.proficio.ca/ebike/YardWorks-08.jpg
https://www.proficio.ca/ebike/YardWorks-09.jpg
https://www.proficio.ca/ebike/YardWorks-10.jpg
https://www.xingheng.com.cn/en/products.html
https://www.xingheng.com.cn/en/products_4.html

this should help
btw i peeled these from the other forum...

peace wasp

wasp

well ineed to remove the back wheel and remove a few links from my motor
chain...anyone done that
to bad i couldn't add a small derailer plastic sprocket to take the slop out...
another thing is bmx footpegs i have'em on the front but would like to put them on the back but the threads are too short...could i relace the bolts with my bmxpegs?what if i used some loctite?why footpegs? why not?they were on the
front for cruise'n with homemade cruisecontroll...piece of folded up paper wedged in...also had my mirrors mounted on them
they got me thinking i might be able to maintain a wheelie longer and help wieght distribution this winter...like the orig vw bug...and studded tires of course
2 more bats...i'm getting ahead of myself
what do you think ?

peace wasp

SeizeTech

looks like you are doing the correct thing already.

According to this website: https://www.electronics-lab.com/artic...n_reconstruct/
the third terminal is connected to a temperature sensor on the battery pack, the charger uses this sensor to prevent damage from over heating the batteries.

I didn't look at the pictures, but if you find that the charger is not even using this pin, that is probably because its doesn't charge at a high enough charge current.

However, if you find that the charger does have circuitry connected to this pin, then I would recommend that you start using it. because it will protect your batteries from damage.

Even if you are using 1 charger to charge more than 1 pack, I'd still connect the sensor to 1 of the packs. that is better than not connecting to none of the packs.

If you have to arbitrarily chose a pack, then chose the one that typically has the lowest capacity after your rides....this is the pack that is most likely to sink more charger current thus creatng more heat.

I hope this helps!

regards
Tyler

toyfountain

I just bought a pair of these lithium batteries with a charger. All I need to fabricate the connections. I'm thinking of rewiring my two sla 24V packs to make it one 36V. Then adding these two lithiums to make a 40V pack. It should get more speed and torque. I'll use the lithiums first since I can't recharge at work and finish the trip with my sla pack. This should enable me to discharge the SLA as litttle as possible while I can't recharge. I'll finish the SLA's on the way back. I can recharge them immediately.

Solar.110mb

That sounds cool. Any idea on range? I know your speed must be up there around 50 MPH?

wasp

glad your like'n them...welcome to da yardworks club
are you reconfiguring your backs? or running without bms's?

peace wasp

riper1

does anyone know how to order from ct from the us i can't log on to the site unless you have a canadian zip

SeizeTech

riper,

all of the electric bicycle gear is available 'in store' only but I'm not sure about the yard works stuff.

if you want to log in with a calgary postal code, try T2G 1M5

shaka2

Hi Everyone,
Just thought I would express my extreme gratitude to Karma, Roninfelix and the Macdonalds Run. I upgraded the izip to 36volts a few weeks ago so I could make it up to the hill to UBC and Back, and am very happy. Next step 48 volts of course, and then turbines (hehe I'm seriuos) I have to give my utmost graitude to Electric Coast Urban Vehicle Philipp for the great job he did to set me up. What we did and it was cool was to patch into the plug motor wire and retain that stupid prioity plug in case I wanted to use the stock battery. I am finding some loose stuff in the front suspension now, and need to take a look...so far so good

toyfountain

I connected my two 20v lithium yardworks batteries. I'm getting 41.5V once the batteries are recharged. I tested it when at 39.5V and it made a huge difference. I went up to 37km/hr with my two sla 24v packs on and I'm at 240 lbs. Cruising seems to settle around 33km/hr. I'll test for range for my weight once I go back to work on friday.

For those interested I made a 2v1h connector using a 3v connector from an old computer power supply. I simply took a pair of long nose pliers and twisted the centre vertical pin 90°. I then soldered the wires to the plug. It works.