KKing problem

[Zebb]

Hi

Just wondered if anybody had any thoughts to a problem I have with kudos king, last time out and today the bike lost power, ie the bike cut of and control panel went off.
Pressing the on button, on the control panel did nothing to restart the power, turning of the key on the battery and then back on, enabled the control panel after pressing the on button, this happen a few times during the first few minutes of using the bike then all is ok, i did 25 miles without a problem.

Do you think this could be the 36v control box, once getting a bit warm the fault corrects it self. I have looked for loose connections and sprayed the connectors to see if that helped
the first time it happened but it hasnt helped. Any thoughts please.

Thanks

 

[jazper53]

I was wondering if the main pins that the battery connects into are a good connection, and look true and not askew?

 

[Deleted member 4366]

In answer to your question, the answer's no. If it were overheating, it would come back on by itself.

If it only happens when under high load, it could be that the battery BMS is cutting off because the cells are out of balance, in which case you have to do some checks to find out what's happening. If it does it when you go over a bump, it's a connection fault between the battery and controller, so check all the wires and connections between the battery and controller. You have to look inside the controller box for that. Does your battery rattle, or is it held firmly. If it rattles, you need to wedge it somehow.

Let us know how you get on.

 

[amigafan2003]

Have you spoken to Kudos?

 

[Zebb]

In answer to your question, the answer's no. If it were overheating, it would come back on by itself.

If it only happens when under high load, it could be that the battery BMS is cutting off because the cells are out of balance, in which case you have to do some checks to find out what's happening. If it does it when you go over a bump, it's a connection fault between the battery and controller, so check all the wires and connections between the battery and controller. You have to look inside the controller box for that. Does your battery rattle, or is it held firmly. If it rattles, you need to wedge it somehow.

Let us know how you get on.

Thank you for replys, what i meant was, could the fact that when the controller got
A little warm like normal temp, could that be hiding the fault when its cold.
Have tested for lose connections, battery terminals, battery is in solid.
I was on flat surface when power was lost.

 

[Zebb]

Have you spoken to Kudos?

Its out of warranty, apart from battery which has another 12 months on it.

 

[ghouluk]

still might be worth talking to them, most folks are helpful and it might be a problem they've seen before or are aware of

 

[banbury frank]

Hi Give Kudos a call the made it so they Know the product inside out also the need to know problems

It helps then with product development

Great Guys the will be will be very helpful from past reports

Frank

 

[amigafan2003]

Its out of warranty, apart from battery which has another 12 months on it.

It doesn't matter. EU rules dictate that poducts should last a reasonable length of time when subjected to normal use.

For example, my washing machine only had a years warranty but I got mine replaced after 4 years as I could demonstrate it was a reasonable expectation for it to last longer than that.

 

[Zebb]

First thank you for the replys again, today I changed over the 36v control box, didnt find any bad connections ect, took the bike out and within the first 1-2 miles it cut out completely as before 3 times I think. Then all ok for 7 miles, then I came home, I have now changed over the key barrel and connectors,
as I have new ones and it all came together as unit, I have tried bouncing the bike and moving wiring about but the bike stays on when doing this, so will test again and see if the bike cuts out with the new barrel.

Thanks again

 

[Zebb]

Just an update I still haven't solved the fault as yet, does seem strange that it only happens during the first few miles,regardless of terrain.Does anyone know if I can fit a different control panel to the standard 36v power supply, maybe I can get a cheap one of ebay to try out.the one fitted is 5 speed settings but a 3 setting would be ok just to try.But I am not sure what I can graft on to the wiring/bike ect.

 

[Deleted member 4366]

You need to permanently connect a voltmeter between the battery and the controller to identify the cause of the problem. As I said before, it's most likely the battery cutting off. Could be a bad solder joint on a balance wire or something like that. You can use one of these. You can stuff the wire ends into the battery to controller connections, so no soldering required. You might have to lengthen the wires if you want it on the handlebars.
K1BO DC 15 to 120V Waterproof Red LED Panel Meter DC Digital Voltmeter Two-wire | eBay
When your bike cuts out, look at the voltmeter. If blank, it's the battery that cut off. If not, its's probably the controller. You can then use it to test between the BMS and key-switch, then between cells and BMS until you've isolated the source of the problem.

 

[Zebb]

You need to permanently connect a voltmeter between the battery and the controller to identify the cause of the problem. As I said before, it's most likely the battery cutting off. Could be a bad solder joint on a balance wire or something like that. You can use one of these. You can stuff the wire ends into the battery to controller connections, so no soldering required. You might have to lengthen the wires if you want it on the handlebars.
K1BO DC 15 to 120V Waterproof Red LED Panel Meter DC Digital Voltmeter Two-wire | eBay
When your bike cuts out, look at the voltmeter. If blank, it's the battery that cut off. If not, its's probably the controller. You can then use it to test between the BMS and key-switch, then between cells and BMS until you've isolated the source of the problem.

Yep got that thanks, I will rig up a volt meter and keep testing.

 

[Zebb]

Well the battery seems ok, volt meter shows power when it cuts out, so its either the wiring or control panel.

 

[oigoi]

Could it be a brake switch fault? perhaps you could connect a wire to bypass the brake switch temporarily and see if the fault goes away

 

[Zebb]

Could it be a brake switch fault? perhaps you could connect a wire to bypass the brake switch temporarily and see if the fault goes away

Thank you for the reply, the fact is the control panel goes off, so its not just a case of loss of motor its the whole lot.

 

[oigoi]

Ah okay I guess the next step is connecting up your voltmeter to the power supply to the control panel and see if it's supply goes off

 

[Deleted member 4366]

When you tried a different controller, did it still use the same panel?

 

[Zebb]

When you tried a different controller, did it still use the same panel?

Yes, so thats all that is left to change and the wiring. But I am thinking as I have had so much grief with it
I think I will just change the whole lot over to other system, if it works out cheaper.

 

[Deleted member 4366]

The KU65 from BMSBattery should do it.