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KS-14C - Battery charging issue


Spoutnik
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Hello,

I am recently encountering a problem to charge the battery of my KS-14C wheel. The battery is 50% full but when I connect my charger, the light on the charger remains green.
It should be red when charging.

Did it ever happen to you? I rided the wheel when it was raining, I am afraid that I broke something. I never dismounted the wheel, is it possible for water to mess with electronic? is there any  kind of sealing?

Thank you,
 

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5 hours ago, Spoutnik said:

Hello,

I am recently encountering a problem to charge the battery of my KS-14C wheel. The battery is 50% full but when I connect my charger, the light on the charger remains green.
It should be red when charging.

Did it ever happen to you? I rided the wheel when it was raining, I am afraid that I broke something. I never dismounted the wheel, is it possible for water to mess with electronic? is there any  kind of sealing?

Thank you,
 

The green light doesn't exactly mean the battery is full, the LED will go green when the current being supplied to the battery drops to a low figure or if no current flows at all, I.e. a disconnection.

Does the wheel still drive OK? Whilst water can do harm, if the battery and power electronics are still working OK it seems very unlikely that water would have managed to damage the charging circuitry and nothing else.

It is at least as likely that the charger may have developed a fault. To identify whether it is a wheel or charger problem you will need to use a multimeter (very carefully) to check. Set a meter to a scale above 70V d.c. (usually 200V) and ensure the probes are in common and volts (not amps). Turn on the charger and looking at its charging plug that you plug into the wheel, the two sockets nearest the indent in the plug should read 67.2V across them, if you get a lower reading the charger is the problem and you don't need to go any further. You can also check the same two pins on the charger socket on the wheel but you need to be VERY careful you don't short the pins to each other or the metal frame of the socket. There are protection devices in the charging circuit, as a result when I read across those pins on my KS14 I only read around 30-35V at 50% charge so all you can really do with this test is check there is continuity. If you read zero it is possible, for example, that the charging plug has come undone inside the wheel. It is a red Deans plug and could possible come undone over time.

Edited by Keith
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On 5/18/2016 at 9:51 PM, Spoutnik said:

Wheel repaired :)

According to maintenance service from King Song China, it was due dysfunction of Battery protection Board.

It was a bad BMS controller board? I just got a used 14D from someone and I'm not able to charge it. It's not the charger cause it's the same charger for my MTEN3 and I can charge it fine where the LED turns RED. When I connect the same charger to the 14D, it remains GREEN.

The 14D is no longer under warranty, so I suspect I would have to pay for a new BMS controller.

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