is there any way to test the HV battery by Techstream ?

Try this thread:

How to test HV battery state of health on your Gen 2 (answer) | PriusChat

Unfortunately the author is no longer on PriusChat. :-(

 

You cant charge the battery like this . Dont try this alone because there are certain values that u must not drop below of the battery , and a certain way to charge it. Also be carefull of the high voltages they can cause death ..

 

No. Those are wrong.

You need to at least measure the loaded voltage to determine the internal resistance. Also you should really measure the capacity as well. There are many ways to do it including measuring it with the pack still connected together.

PS: What you are talking about is module. Other people also call them cells by mistake. There is 6 cells (in series) inside every module and then 2 of those modules are connected together (in series) to form a block. And then 14 of those blocks are connected in series to form a whole pack.

 

Hi Valde3 , I saw you are familiar with the techstream and hv batteries so i have some quetions , i would be grateful if you could help me. When checking the voltages of an HV battery lets say of a prius or a lexus , and u notice block 1 is problematic . How do u identify block 1 (2 modules) when u have the battery opened in front of you ?

 

Unfortunately depending on the model it can change. On some it’s the one on control unit end and on other just the other end. Best is to actually measure the modules.

 

I know they change from model to model that's the problem , do u know a way to check which block is 1 each time ? It's not mentioned to manuals.