Can I replace 1st generation battery cells with 2nd generation battery cells?

It would be even more precise to say module 37.

Cell 37 would be, I think, be found at one end of module 7.

 

Yep, it was module number 37, Cell number 219

 

Just to comment that the Gen 1 NHW11 has 19 "blocks" meaning 38 modules, not the 14 blocks and 28 modules which you mention which applies to the Gen 2 Prius.

 

Thank you for correcting that. I had both gen 1 and gen 2 in mind because the thread mentioned both, but it's in the gen 1 forum, so I should've used the gen 1 numbers.

 

Congratulations on your temporary HV battery repair! I can see why you wisely placed the longer replacement Gen 2/3 module at the end as that minimised the deformation of the bus bar. If you have any more original modules fail then you may be interested to know that I have kept several of the Gen 1 modules from my brother's repaired Prius, including 4 replacement modules bought from ebay that were manufactured in December 2010 which as I said in my post I think must be from a later Toyota manufactured factory replacement spare HV battery and appear to be in very good condition. I keep them regularly charged, I last charged the 4 2010 modules several weeks ago and they are all reading 7.78V at the moment. So if you should ever need some Gen 1 module replacements let me know.