Which BMS do you have?  What sorts of alarms has it given?

If there have been no alarms, then it is most likely a loose connection. Try re-torqueing all of your battery connections.

You can also measure all of the cells after a long drive - they should all be very close to each other in terms of voltage. If there is one or two that are lower, they are probably weak cells.

For example, after an 18 mile drive, I had almost all cells at 3.29v, and one a 2.91v. That 2.91v cell was definitely bad - but this was after 6 years of driving.

Cheers, Peter

On 9/13/14, 5:31 PM, Sam Shepherd via EV wrote:
I have BMS and they are Lithijm and the are less than a year old.

On Sat, Sep 13, 2014 at 5:17 PM, Willie2 via EV <[email protected]> wrote:

On 09/13/2014 07:03 PM, Sam Shepherd via EV wrote:

Would anyone have ant thoughts as to why my "pack" voltage starting out
with 160.8 volts on the dial would drop to 140 volts on a mild "pull"?
It has just started doing this.
I didck. the cell voltage of each cell with no real diferences.

If lithium, near the end of the capacity or near the end of life (reduced
capacity).  If lithium, do you have BMS?   Or, poor connections.
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