Why is my refuse to start for a while (10min approx)

Did you change it yourself? Were the cells balanced? Is it really cold where you are? Are you getting codes?

We aren't answering because mostly we don't know, but also info is a little thin.

 

When you say "start", do you mean the engine does not start, or the vehicle refuses to move?

I ask, because a Prius will not necessarily operate the ENGINE at all, unless coolant temp/load/HV pack voltage demand it. With a new HV pack, it is likely that the engine would not be started when you press the ON button.

 

What about the 12 V battery and it's connections ?
What exactly happens when "it won't start" ??

 

I think you have posted your question in the wrong place. This place is for the Gen4 Toyota Prius.

AFAIK you do not 'plug in the key and turn it to on position' nor do you 'take the key out'. There is no 'temperature in blue' display.

Hope that helps

 

I've been seeing it in the Gen 1 section. On a Gen 1, there is a key that one uses. And there is a blue temp (cold) light on the dash.


I think, referring to the OP, that I'd go back to the shop that installed the traction battery replacement. Changing the hybrid battery shouldn't by itself cause a problem. You may have a weak aux battery, tho, it operates the relays and solenoids that allow the motor to start. When if fails to start, check the battery in the trunk with a multimeter. It should be well above 12v. You can test this hypothesis by carefully! use a jumper cable and a known good car battery (or one of those booster batteries) to try to get the car started. Carefully=pay close attention to battery polarities--failure to do so can blow a main fuse & a bunch of little ones, too.