Tool/software: Code Composer Studio
hello team,
As per our today’s telephonic conversation, I am defining my problem statement below.
I am trying to balance 13 Li-ion cells (LGHG2) using EM1402 Evaluation board in my system . As per the design guide of the evaluation board, the channels which are not used should be shorted to battery positive. The Example code for evaluation board code is modified such that the logic works for 13 cells.
The board has a capability to balance the cells with balancing current varying between 2A-5A.
- The board was tested with 2A, 3A,and 4A and the board was functional correctly. While trying to balance the cells with 5A, the evaluation board fails to work according to the algorithm.
- Now , when I am trying to balance the cells even with 2A , the cell which needs balancing (12th channel) gets the appropriate current , but at the same time , two other channels (6th and 11th channel) are also reflecting the balancing process, out of which one cell is charging and other discharging.
- The above mentioned channels are just an example , the two channels (other than the channel which needs balancing) are not fixed . They are random.
I am attaching the snapshots of the hardware and the balancing currents that I am getting on corresponding channels. When I tried debugging the issue , the SOURCE and GATE signals for the MOSFETs associated with cell that needs balancing are getting activated but at the very same time , other two channels are also receiving GATE and SOURCE signals. I cannot find the reason behind this because the test points that are given on the board related to gate driver IC EMB1428 are getting correct voltage values.
Request to you kindly assist me in this regard so that we can proceed further.
