Woosh CD Sport electric problem
- Thread starter denwyn
- Start date
Woosh confirmed tonight they have tested my battery, it discharges ok and recharges,so no problem with it ? , they have offered to send me a new battery to try when they return mine, just in case it works, i cant really see what difference it would make if my battery is ok, I have accepted there generous off though, will not get battery for a week as away most of week and not always someone in to accept delivery.
it could well be that your battery is now rebalanced when it was at woosh and you don't need a new battery.
Some batteries have their BMS powered by the first or the last cell on the 10S string. If you leave the battery switched on for a long period of time, the BMS continues to drain that cell more than the other 9, causing the battery to get out of balance. When you put the battery back on charge, the cell that is most discharged won't get as full, limiting the overall capacity and causes the battery to trip before its normal range.
You should ask Andy @ woosh to check the cell string's voltages before returning your battery to you - it will take you a lot more time to do this yourself, just to make sure that all your cells have identical voltages.
Note also that Lithium ion batteries lose about 4-5% capacity/range each year, less if you use the bike often, more if you use the bike less often.
Some batteries have their BMS powered by the first or the last cell on the 10S string. If you leave the battery switched on for a long period of time, the BMS continues to drain that cell more than the other 9, causing the battery to get out of balance. When you put the battery back on charge, the cell that is most discharged won't get as full, limiting the overall capacity and causes the battery to trip before its normal range.
You should ask Andy @ woosh to check the cell string's voltages before returning your battery to you - it will take you a lot more time to do this yourself, just to make sure that all your cells have identical voltages.
Note also that Lithium ion batteries lose about 4-5% capacity/range each year, less if you use the bike often, more if you use the bike less often.
Think they have done that, i know he said something about it being rebalanced. They are extremely helpful, gets a bit of a pain when things go wrong though and while i do know local places wouldn't have done anything about battery, its not helpful when they wont touch the bike for any repairs at all, im not bad with mechanics of it, but electrical is something i know nothing about at all.Just a pain if the bike ever has to go back, hoping this will sort it now, and its going to be ok. I retired from work yesterday and do plan to use the bike more all year now, hoping it will help and the bike will be more reliable.
Try a simple approach, trace all the plug connectors, find the controller and its bunch of plugs, unplug each one and give a touch of WD40, plug and unplug each one a couple of times. Do this to the sprung battery pins. Take particular care with the connector on the motor cable. Check this cable where it enters the axle for any damage hidden by the rubber cover. Are your brake levers a bit loose, they could be causing the switches to operate randomly. Ebikes are roughly where cars were about 1920 so you have to be able to 'get out and get under'. Find and read posts on here by D8veh and trex to get a good idea of how common faults can be traced and fixed. You are not alone.
Battery arrived back from Woosh today, along with a new battery to try, first impressions with my battery are the bike is ok, no cutting out at all, been out for a few rides, and it all seems to behaving itself, before it would have lost power slowly then cut out completely. From what i gather Wossh have done something in re balancing the battery ??. Anyway it looks like its worked, will try it for another day on my battery, then hopefully send the new one back. First class service from Woosh, very helpful, as are the experts on here.
Cant say i have the same confidence in the bike anymore, time will tell.
Cant say i have the same confidence in the bike anymore, time will tell.
Had bike with old battery for just over a week now, not been able to get out on it as much as i had hoped as away on holiday for 5 days and weather not good last couple of days, anyway took it out today and it was fine, but after a bit of a jolt to the bike with a larger than i though drop of the kerb it started playing up again just after. On looking at the battery holder i noticed one of the connecting contact pins in the base was solid and set slightly lower than the other pin, contacting a very helpful Andy Hall at Woosh he informed me that both pins should be spring loaded, so i removed the battery holder as far as i could, not all cables have connectors on them. After a bit of fiddling i managed to remove the offending connecting pin, nothing wrong with it,the problem is the hole it sits in on plastic base has worn larger resulting in the pin sinking in to far and stopping the spring action, temp repair with a small washer, and the pin is again spring loaded,seems to now hold the battery firmly in the holder as well. Been out again tonight with old battery fitted and it seems ok. Only problem is this repair is temporary, doubt it would last long it really needs a complete new battery holder, have emailed to see if Woosh stock them, doesn't look difficult to replace,except that one of the cables enters into the bottom of the base and disappears into what i imagine is the electric controller or whatever you call it inside the holder, all the other cables have pull apart connectors on them, this cable seems to come from a sensor on the frame by the rear wheel. I'm wondering if this has been the problem with poor battery connection, going to return the new battery on Monday, giving the bike a few more days test, hoping Woosh stock the parts to repair this, but thinking while i have no complaint against Woosh, the quality of some of the parts is very poor, making me think is it going to be a problem bike with parts failing. this does seem to be a problem with cheaper bikes, friend at work has had no end of problems with Cyclamatic fold up bike,Shes sold it now and bought a Gepedia Reptilia, looks a well put together bike, not cheap though.
Afraid it's a bit late for grease now, don't think they had seized up with water ingress as never really rode bike in rain at all, hoping Woosh sell same type battery carrier, with same electrical connection. I'll put a glob of grease on new one then.
re grease, anything with a spring needs grease. The spring loaded prongs at the base of the battery got sticky with humidity in the air and when pushed in, stayed stuck to the plastic base. To fix that, put a glob of grease over them.
the base of the battery houses the controller. You don't need to open the controller box for this, just grease the outside of the prongs. I had the same battery back in 2012.
the base of the battery houses the controller. You don't need to open the controller box for this, just grease the outside of the prongs. I had the same battery back in 2012.
It's to late for grease, the spring contact has made hole it sits in bigger, and sits lower on base, temporary repair with a washer underneath lifted it, but it won't last long. Only asked what was under main cover on base, as should Woosh happen to stock spare battery holder I would need to open it to remove one of the cables that goes into it, the others all have connectors on you can unplug.
Woosh have been very helpful, Andy@Woosh is looking into seeing if they have a spare battery carrier i can have, i have my fingers crossed they can find one. Sending the new battery back as don't think i need it after trying it i had the same problem yesterday, seems it could be bad connection problem after all. feeling a bit more confident in doing these repairs now, although not keen on messing with the electrics, but its worth a go.
New battery carrier fitted after a fair bit of swearing, very fiddly electric cable connections, contact pins greased, cable entry sealed with a big blob of silicone. Bike appears to be OK, battery held much firmer, hoping the problem is now solved. Don't think I could take any more problems with it .
Your not wrong there, only mishap was connecting two small connectors wrong , resulted in only way to get the motor working or change motor power speeds was with throttle, bit of thinking and I swapped connections round with everything back to normal, only to pleased I caused no damage. I was warned before hand by Andy@Woosh it was a very fiddly job.