Kalkhoff Impulse Battery problem

[MR E]

Symptoms-- On my Agattu the 3 blue LED battery indicator flashes at ( usually ) 1 second intervals. Battery charges OK and runs ok , but I believe this may be caused by cell imbalance. Tried several recharges- discharges but still same. Tried on another bike and fault goes with battery. It is a Derby Cycle 612wh 36v 17ah type - 3 years old. Sometimes the the leds flash in a faster cadence.
The red leds on the battery itself work normally. Wondered if there is an easy way to check these cells?

 

[Nealh]

Charge the battery fully and then tell us the voltage reading.
From that we can guide you on the next step.

 

[MR E]

Battery charged:- with battery upside down and led display away from you, counting L to R on underside lugs-voltage across Pins 1-4 = 41.8 volts , Pins 4-5 = 41.6 volts. Compared this to my similar battery ( although this good battery is a 15ah, 540wh) the results are very similar Pins 1-4 = 41.5v and pins 4-5 = 42.4v.

 

[Nealh]

Though not familiar with Kalkhoff battery the end voltages seem to indicate a battery well balanced and in good condition. It is possible that one group may be discharging quicker then the rest or maybe a faulty sense wire may be causing the led light flashing. A definitive answer would be to open the battery and check the results with the dvm by measuring the cells at the bms/sense wire connections and also checking for any loose wire connections.

How is the range/mileage fairing with the battery if it is still good then I doubt there is little to worry about.

 

[Deleted member 4366]

The cells are balanced. It's more likely that the indicators are faulty.