shimano steps e6000 battery wont take charge

[chicken4later]

Hello all, I just picked up an IZIP e3 path plus second hand for very cheap... but the battery charger was missing. I believe the bike has been sitting for about one year with a dead battery.

the battery is model number BT-E6000, it has 40 18650 cells in 10 groups of 4 for 36v total

since the correct charger is over 100 dollars i decided to go ahead and buy a generic 36v lithium battery charger and try to make it work. When I plug the charger into the pack it wont charge the battery. The BMS is not passing the voltage from the charger to the cells. reading online I found that some BMSs wont charge the cells if they drop below a certain voltage, so i charged the cells directly for a few minutes.

The pack started off at 18.6 volts and i charged it directly for about 10 min and the voltage rose to 33.2v. Then I went back to charging from the connector on the outside of the pack and still noting. my charger is rated for 2 amps and the factory charger is 4 amps

There are also 2 small wires going to the connector on the battery pack so i am wondering if the original charger has to communicate with the BMS before allowing a charge? or are the wires only to communicate with the controller on the bike? Is my battery pack worn out from sitting too long? Any ideas on how to get this thing going would be appreciated... I want to ride my bike!


if anyone has a shimano e6000 charger i would like to know how many connectors are on the plug

 

[Dementia]

Hey I have an e6000 charger from my stolen ebike. PM me if you want to just pay shipping on it.

There's 4 prongs

 

[chicken4later]

PM sent. Thanks :thumb:

 

[kdog]

Two things.. First @18v for a year that pack is toast. Average V of 1.8v per cell is below safe, and a year is hell long at that voltage. If and it's a big 'if' you wanted to resurrect it I would have recommended charging very slowly til above 30v then normal charge, monitoring for heat.
I would also observe each cell group for self discharge and excessive heat during cycling, Chuck it immediately if either of those two situations occur. Then I would keep/charge it nowhere near anything important like house/family because unknown damage may show up later on.
Second:
I would say that the bms has detected a low voltage event and is off, maybe for good or until diagnostic software turns it back on. Or it may be that it requires the e6000 charger. The integrated nature of this system almost certainly requires the correct charger. I guess you will find out with the new charger. Let us know I'll be interested to see.
Be highly suspicious of that pack.

 

[RCL]

Hello,

I have the opposite problem on the same system: I've got a Shimano STePS EC-E6000 charger (rated output 40 V 4.4 A / 42 V 4A) that I would like to use as a fast transportable charger on a custom made ebike.

The output connector has 2 power pins (+/-) plus another 3. There is also an adapter (SM-BTE60) which uses only 2 of the 3 communication wires. See pictures & drawing below. I have no Shimano battery, but thanks to the pictures of Chicken4later and considering the tensions I measure on the output pins, one is probably the battery Rx signal (3.3V powered, no battery) and the other one Tx (0V powered, no battery).

I understand basic electronics but no more, I tried to follow the tracks from the communication wires and understand the circuit unsuccessfully up to now. Didn't find the datasheets from the few markings I can read on the components (illegible for most part).
Rx wire seems to come from ZD10 & ZD8 (Zener diodes ?), then from some resistors and capacitors, then from IC7 chip (Sino W SH78F1615P something). Tx wire seems to go through ZD2 & ZD9 and maybe through Q7, etc. on one way, and through F86 then probably toward the same chip IC7 on the other way (also 2 adjustment potentiometers in this area, on the other side of the PCB).

So I don't know if the charger is only waiting for a basic signal (like a 3.3 V constant signal ?) to power on and then adjust itself the output, or if its a more elaborated system where the BMS of the battery sends complex signals to control the charger output ?

A simple try could be a direct connection between Rx & Tx and see if it cheats the charger so that it powers on. But I already had "good" ideas like that on the past to quick fix electronics devices that ended with burnt and definitively dead devices... (this charger is still working - but for a Shimano system).

If someone has a suggestion for cheating the charger, I'd be glad to hear it.

 

[Puiu]

Hello everybody,
I have two Shimano E6000 chargers which don't charge E8010 or E8014 batteries.
I have a third E6000 charger which does the job.
Also, I have several E8010 / E8014 batteries - 3x E8010 and 1x E8014.
The batteries behaves the same, the do charge with that third charger and won't charge with the first 2 chargers, so the problem is pretty clear in the first 2 chargers.
The error - battery start charging for 1-2 seconds, then first battery LED is flashing, the second is steady and the rest of them are off.
This is indicated in the manual as "charging error" and no other details written.
I find it even funny, that they describe what to do - "Remove the charger from the battery and press the power button, if an error appears contact an agency" - but what if the error does not appear...?
Does anybody encounter this problem ?
Any solution ?
I'm thinking to disassembly the charger and read all signals, using an oscilloscope, while initiating and performing charging, with the good charger and then with the two defective ones, comparing afterwards the results.
Any hints or ideas?
Thanks