What I really want to guess is - do we think they can actually do a good job of reconditioning a Pius pack for $1500? What if there were some problems with the pack? I am not trying to learn how to do it in a home situation (maybe later), this is about - is it likely the AR&D system actually does good work? You can see my problem - I don't know what good work would look like for a Prius Pack.
Supposing a pack that is needing a lot of work. Then you have testing, probably some tear down and R&R of cells. I don't know what is in a Prius pack - is there a charger? BMS? All that is handled by the car's electrical system? Do we know how much Prius NiMH cells cost? Used ones? New? A whole new pack? On Mon, Nov 17, 2014 at 3:28 PM, Lee Hart via EV <ev@lists.evdl.org> wrote: > Michael Ross wrote: > > Here is one test unit available for Prius packs: > > http://www.go2hev.com/hybrid-vehicle-battery-testing-and- > analysis-kit.html > > > > The maker Automotive Research & Design (what an instructive name) does > > more than just produce this test unit - they do a lot of training of > > mechanics by various means. > > http://www.go2hev.com/home.html > > > > OEM cell test equipment seems to come from ARBIN > > http://www.arbin.com/ > > "If you got the dough, then it's a go." But this tends to be expensive > commercial equipment and training for professionals that will do this for a > living. > > > Lee said: "The only way to know for sure is to TEST. Test each cell > > or battery, and see what you've got." > > > > This was my assumption. I will be interested to see if the school or > > Hybrid Shop goes to this much trouble. > > Yes, this is a concern. I notice that the go2hev.com unit says it spends > 20 *seconds* doing the power test, and the graphs say the amphour test is > similarly brief. Now if you're in a shop and working by the hour, you want > the quickest possible test, regardless of its accuracy. But I have to > wonder how accurate the data that you get from such a short test will be. > > > If we were to estimate the labor required to test a Prius pack > > - what would that look like? Would it be any where near sat $1000? > > A typical auto repair shop is likely to charge $100/hour. At that rate, > $1000 is about 10 hours of work. They have to pay for all that equipment > and testing, right? > > It can obviously be done far cheaper yourself, if you're willing to invest > your time and a few dollars for simple equipment. > > A voltmeter, some light bulbs for a load, a commercial battery charger, a > clock, and a clipboard are sufficient for basic testing. That's what I used > to do. I learned a *lot* about batteries this way! > > Or, you can buy a simple battery tester/cycler, intended for the R/C model > cars and planes. For example, I have a Model Rectifier Corp. "Super Brain > 989". It tests lead-acid, nicad, nimh, or lithium cells or batteries up to > about 24v and 20ah capacity. Cheap (and cheaply made), but it works > adequately for hobby use. There are many similar units. > > Or, you can build my Battery Balancer (or something like it -- the plans > are open source and on the web). It does what any battery tester has to do: > Select a battery or module, charge it under known conditions, discharge it > under known conditions, compare and record the results. I've been building > and refining it for over 15 years! It's at http://www.sunrise-ev.com/ > balancer.htm > > -- > Don't worry about people stealing your ideas. If your ideas are any > good, you'll have to ram them down people's throats. -- Howard Aiken > -- > Lee Hart's EV projects are at http://www.sunrise-ev.com/LeesEVs.htm > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/ > group/NEDRA) > > -- Put this question to yourself: should I use everyone else to attain happiness, or should I help others gain happiness? *Dalai Lama * Tell me what it is you plan to do With your one wild and precious life? Mary Oliver, "The summer day." To invent, you need a good imagination and a pile of junk. Thomas A. Edison <http://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html> A public-opinion poll is no substitute for thought. *Warren Buffet* Michael E. Ross (919) 550-2430 Land (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google Phone (919) 631-1451 Cell (919) 513-0418 Desk michael.e.r...@gmail.com <michael.e.r...@gmail.com> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20141117/a9e7b232/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
