Confused about traction battery voltage.

It’s just the voltage at the condition the pack is in. So if you were at a lower %charge on the pack, the lower the voltage would be.

If they are that close, that’s a good sign.

But performing a load test is a better way to know.

 

Eagle hit it pretty good.

15.6 is a fairly normal voltage for a block that has not been exposed to a charge condition recently or even overnight. Remember, that's still 7.8 volts per module. The ones you see >16 have most likely recently been exposed to a charge current, or currently being charged. for instance, if you roll under battery power for the last quarter or half mile when getting home, you'll see lower voltages. I don't think you have anything to worry about.

 

Sometimes the eagle does land.

 

The battery is weak and is close to failing. A quick cycling from full to empty is one of the first signs.

The load test with diagnostic readers will show you how bad it is, but it ain’t that great.

I’d plan for either a replacement in the future, or reconditioning it if you like to DIY.

Good luck and keep us posted .

 

This is one of the great times for using the Hybrid Assistant/Hybrid Reporter apps with a bluetooth obd adapter. There's a HV battery test you can perform using the AC system. It will log and graph all 14 block voltages. It makes it very easy to see if all blocks are fairly well balanced or if there's weak blocks. A well balance battery will show all 14 graph lines in a tight group, very close to one another. Any weak module/block will fall out of that range much more quickly. It will be obvious.

Just Another HV Battery Thread and Experiments | PriusChat

Look at post 5...that graph is similar to what you may see. You can see one block that falls off a cliff about 5 minutes into the test.