Re: Nissan Leaf Battery Source
If you do add new cells to an existing pack, you want to make sure that the individual cells are balanced with the ones you are putting in parallel before connecting them. You can use a power resistor to limit the current and connect them that way until they equalize. I also recommend that you balance the whole pack before installing it so that your BMS doesn't have to try to correct a large imbalance. I charge the cells to 4V per cell before balancing them.
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