01 prius p3006 and 3000. also I think it was a799

just got a message from him. now ehn checking the ahr capacity. what rate of charge/discharge should i do. right now the bad cell im cycling at 2 amps. is that ok.

 

im thinking of cycling the whole battery over the next couple of days. is that ok to do that. my charger can charge 2 at one time but can only discharge one at a time.
so i could discharge starting with the cell closest to the hv ecu till the charger shuts off then charge. and then discharge the next cell while the other is charging and so forth. is this a good idea or should i just let it go and worry about the adjacent modules to the bad one in block 6 and just replace the bad one.

 

that the other question, when checking the capacity, how should i do it with the adjacent ones. drain and recharge once. or cylce them 3 times. my fear is boosting the ahr capacity and messing up the battery. what is your recommendation?

i found a prius battery company about 2 1/2 hrs from me. called priusrebuilders.com

check this company out. they told me i can get a rebuild with gen 3 cells for $1750 which i dont think is bad at all. I just want to get through the next couple months so i dont have to take out too big of a loan if i can help it(i could get a loan today and buy a battery but i dont feel like doing that). the less of the loan the better.

Anyways back to the capacity thing.

 

how would you cycle the cells to check the capacity? drain and charge once? at what amperage also?
my charger does not like going over 2 amps on these.

 

if i could get it to drive to there that would be great. if not no big deal, i got a ford escort zx2 as a back up(got the car for my girlfriend lol). ill pull the battery and take it there and swap my ecu and all that right there and bring the new battery back. or of they can do it, ill take my old cells out an go pick up their new cells and bring back the new ones and put them in my case. i know I can do it but its just a matter of how.


now what amperage should i charge and discharge the cells at.

 

i dont think I can set a minimum voltage on my charger. ill check

 

no i cannot set a voltage stop on my charger. i guess ill stay with the battery.

 

the battery module voltages starting from the hv ecu to the opposite end.

1)7.83v
2)7.61v
3)7.56v
4)7.53v
5)7.50v
6)7.50v
7)7.48v
8)7.45v
9)7.46v
10)7.43v
11)7.44v
12)7.04 v(BAD)
13)7.44v
14)7.44v
15)7.46v
16)7.46v
17)7.44v
18)7.47v
19)7.46v
20)7.47v
21)7.58v
22)7.46v
23)7.46v
24)7.47v
25)7.46v
26)7.45v
27)7.46v
28)7.45v
29)7.48v
30)7.48v
31)7.47v
32)7.48v
33)7.50v
34)7.53v
35)7.56v
36)7.60v
37)7.65v
38)7.70v

what do you think besides number 12 being bad. is module 21 anything to be worried about?

thank you,
Scott

 

Now i called priusrebuilders and talked to mark there. i told him my situation and I told him what i am doing and he told me all that does at 1 amp is measure capacity. that you want to measure capacity and resistance. so i would have to bump up the charge/discharge to 3.5 amps and top off at 8.5v then discharge to 7.8v and measure the mah that get discharged from 8.5 to 7.8. that at 1 amp its not reading the usage that you would get in the car i will only get capacity. is this true? oh and he said never take it down to 6 volts as that can destroy it. is this true?

 

i agree. now i recharged and topped at 8.5v and it gave me 1285mah which i dont think is right. this is the cell thats the second out towards the hv ecu. i am now bringing it down to 7.8v at 3.5amps. what should i do

 

is the guy at priusrebuilders correct in the cycling of these cells at 3.5 amps? from where they are sitting to 8.5v the down to 7.8?

im trying to see if this company is full of it or if they make sense because when the time comes, im thinking of getting a gen 3 rebuild from them since they are only 2 hrs away from me and I want you guys to see what they are telling me so i can get a good idea from those here that have been succussful with their own batteries if these guys make any sense.

ok lets take a question answer.
all who have cycled their packs to bring them back to usable capacity, what did you do and how well did it work out?

if this needs to be moved to another thread let me know, ill post this elseware. I'm thinking of cycling my whole pack to get me by for the next couple months so i can build funds. but want to know how to do it and do it right.

thank you,
Scott

 

thats what im thinking. he does generation 3 rebuilds for 1750 includes everything and the ecu. mark at priusbuilders said he could send me 3 modules for $20 each shipped. i did his testing procedure and at 3.5 amp discharge from 8.5 volts down to 7.8 all were in the 750 mah range. he said thats good numbers.

 

mark asked me how many miles are on the pack, i told him 164k on the pack so he is going to find some that were around that mileage so i dont throw the pack very far out of balance. i mean what do you think would be the better way to go. your batteries or his. i have no clue what your testing/ balancing/ charging/ discharging equipment is(its better than what i got thats for sure). nor do i know what his equipment is either.

im kind of lost as to where to go just to get me by to build funds for another pack. either through you or him.

 

Well of course he does <laughs>. he will make money. if i did batteries, which i wouldnt mind getting into that. i like it. i would be trying to get as much business as i could also.