Hello, fellow Prius nerds! I just wanted to show off the corrosion in my hybrid battery, in my auction rescue CT. I've been dailying it or 6 months, just got back from a 2800 mile road trip, with no problems. A couple weeks later, it threw a code for internal resistance. Since I have another, lower mileage one, I swapped batteries, and now I'm taking the old one apart. The case has some rust on it. Maybe a spilled drink in the back seat, maybe the sunroof got left open in rain, who knows. Most of the nuts on the rear side were crusty. The front side seems to have escaped whatever was causing this. It's a Lexus with a sunroof, so I'm going to try to clean the drains (when I can find them) and reglue the door seals, the adhesive on these have completely failed, which I chalk up to, nobody designs cars for Louisiana. This plug did not want to come out, I wrestled with it for 10 minutes. Wasn't expecting this. *facepalm* To clean up these absolutely coated busbars, I decided to roll them around in a bottle with hot vinegar and salt solution, as seen on the webtubes. I threw the nuts in too, thinking they also have corrosion, and it would help tumble off the copper oxides This was a terrible idea. It worked, but then they got coated in all of that mess, and started corroding on their own from the water in the vinegar, so I had to reclean them separately. Learn from my mistake here. Voltages, as it sits. Looks like 3 cells to replace here, though I'm going to be pulling the good ones from this guy to put in the driver battery. I'm considering rebuilding this, as a spare or to sell, but not sure it is worth that with all of these issues. And, it turns out the battery I swapped into my driver has some bad cells, so the plan for right now is, pull it back out, and swap in the better cells from this heap.
I would guess the blocks are leaking. Baking soda, and a wire brush, and/or sand paper is the best. But you can get new ones, nickle plated for about $30. And if you throw backing soda on those terminals, you'll likely see it bubble up from the leaking acid.
Acid doesn't leak from these batteries: they use an electrolyte that is strongly alkaline (and will burn you just as well as a strong acid would). Toyota suggests using boric acid when you want to neutralize the stuff.
I'll give them a good leak check, since I'm going to be using some of these in my driver, but I don't think these cells are leaking, this is dissimilar metal corrosion, exacerbated by humidity. Copper + chromated / plated steel + moisture x amps x time. That pin that came out of the module is frozen into the connector with corrosion. I did clean the rest up with a fine pad, and oiled all of the fasteners, but that's all getting put up indefinitely, at least until I pull the driver battery, and see what that looks like.
Well what is the white shite that makes its way in between modules to under tray for isolation issues turns to powder?.. whatever it is . Need to get some newer sealed type things going on . 8 would think today in that HV case space we have should be able to get what like 8500 mah in that space from what the 6500 we had? at the 200V I mean what's so difficult not cooling to deal with cept fan
