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IMA Enthusiast
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1,382 Posts
OK..

With this and the info from the other thread it looks like you have a bad cell which will have to be replaced and a bad BMS board which will also have to be replaced.
This is not an easy or simple repair. If you don't have the skills, equipment or expertise do not attempt it.

The easiest thing to do will be replace the Lithium battery module or swap in an entire Nimh pack and run with that.

Replacing the individual Lithium cell will be difficult and first you have to find one.
It would be better to replace the complete module of twelve cells.
If you do this you must use a block from the same position in the spare pack.
You will probably need to manually balance the four blocks so the voltages are all the same before the car will accept it.

I can send a BMS A board but that costs US $200 (You might get a complete pack cheaper in your country)

Please read all I have written on this forum about the P0B3B problem.


Do not try and charge the bad cell or it could catch fire. :eek:


Post all new information here. Thanks
 

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IMA Enthusiast
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1,382 Posts
I appreciate English is not your first language so we have to be careful translating stuff back and forth.

D is not the right BMS board.

Based on the diagnostic information you have supplied so far, in my opinion board A has failed.

Did you balance/charge the replacement cell to the same voltage as all the others in that block when assembling it? (You definitely should have done)

If you did not change the correct BMS board then the fault which existed still exists and may well kill (have killed) your new cell.
Your faulty BMS board may have a failed on bleed resistor mosfet, and this means there could be a load draining the cell all the time. :(

Measure the voltage of the new cell you fitted, is it really only 1V? If it is then it will have to be changed again.

Show me with photos which block the failed cell is/was in? Which BMS board is plugged into that block?
 
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