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DefaultPeanut posted:Posted to a local FB group, but I cant quite place the bike. Ducati something... Probably a 1098, also probably hit something.
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Feb 28, 2017 22:33
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kastein posted:Alright, I'm going to do something I rarely do now and poo poo all over a specific brand of aftermarket automotive component. Mostly because the level of ignorance and/or disregard for customers displayed in this product is... shocking. kastein posted:If you want to, go ahead. My expert witness rates are quite reasonable (see title of Adiabatic's thread) and I half expect an angry letter from them myself, to which I will simply reply that comments backed up by engineering expertise are not libel or slander and if they want a better review they should produce a product that isn't dangerously lovely and risking burning their customers vehicles and/or shops to the ground JBark posted:I was wondering that myself, then realized the only answer can be that they couldn't actually bend the proper sized wire to fit inside the case, so used two smaller wires instead. Soooo it's time for Round 2 of the lithium ion auto/race battery teardown festival! Today it's a Shorai LFX24A3-BS12. It's been in a prototype vehicle for approximately 1.5 years, and served well until  They're using prismatic/pouch cells. Allegedly this is a Lithion Iron battery, not sure if they actually mean LiFe or LiFePO4 (which is more abuse resistant.) I'm very impressed with their assembly compared to Braille. The casing is injection molded plastic instead of machined from a block, which is cheaper, but only in volume, which tells me they actually have a production line instead of some hick in a basement in Florida.  Actual shrinkwrap was used around the battery assembly! It was then glued into the bottom of the plastic housing with some sort of low durometer thermosetting resin or hotglue.  8 cells. My guess is 4S2P arrangement. Also, they used actual Kapton tape to insulate things, hold foam padding on (there was foam padding!), and bond the pack together.  The wiring is done with quality high-flex hightemp silicone insulated wire, all connections to ring terminals for the battery lugs are heatshrunk and in fact use custom ring terminals from the look of it. The unshrunk tubing is there only to bundle the two wires together as far as I can tell.  More Kapton tape. Also, this pack has a bonding jumper that must be installed prior to use that connects these two lugs together, which is nice. What this allows is for cheaper safer ground shipping because the bonding jumper isn't installed so the lugs won't arc if shorted together. The battery is only "live" once you remove the 4 screws (2 visible) and the cover, install the bonding jumper plate, then put the cover back on.  It's got a balance port! And the wires soldered to the board for it are strain relieved with silicone. Also, holy poo poo, they put a QA sticker on it, which theoretically means they have a QA department. Braille didn't even bother pretending.  More Kapton and you can see here that the battery pack is composed of two 2S2P packs which are combined in series by the bonding jumper to form a 4S2P pack, as I guessed.  Quality wire. Other observations: I wish they'd used 8ga or 6ga wire instead of 10ga with 14ga paralleled with it, but that might just be me. If it gets the job done... This battery is the same external size as another unit they sell but has lower current capacity. I'm guessing that's why there was so much dead air in the housing, there was easily enough space to wedge two 2S3P packs in instead of the two 2S2P packs this one came with, to increase cranking amps 50%. Might even be possible to fit in 2S4P packs for a 100% increase. Also it appears there is enough space between the lugs to actually install a proper built in balance charger if someone wanted to pay them enough to do so. Having an external balance charge port is good enough for my use most likely though. Quality of this unit is worlds beyond the Braille one I disassembled. Cranking amp comparison I haven't done, but I'd rather have this thing in my car than a Braille anyday, since a car that isn't on fire tends to finish before a car that is on fire. imgur is down/half down presently so you may or may not be able to see the images.
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Feb 28, 2017 23:27
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You just confirmed what I've suspected. That Shorai is loving fantastic. They're expensive, and you have to use their proprietary charger to balance charge it, but all in all it looks like you're getting what you pay for. Also, they're LiFePO4 iirc.
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Mar 1, 2017 00:11
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You really don't have to use their proprietary charger, just the right connector plugs in, at that point any LiFePO4 (glad that makes two of us that think that) balance charger should do the trick. If you need the pinout, poo poo, I have this thing torn in half and can just look at it.
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Mar 1, 2017 00:36
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kastein posted:You really don't have to use their proprietary charger, just the right connector plugs in, at that point any LiFePO4 (glad that makes two of us that think that) balance charger should do the trick. Hey it couldn't hurt, post it up!
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Mar 1, 2017 00:44
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Do automotive lithium chemistry batteries keep the cells a 70% of nominal capacity to maximise longevity? Lead acid batteries are happy when they’re kept at full charge at all times, but li‐ions are not. Platystemon fucked around with this message at 01:13 on Mar 1, 2017 |
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Mar 1, 2017 00:58
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That was true 5 years ago, and these are LiFePO4. I don't know about lithium iron
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Mar 1, 2017 01:06
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GnarlyCharlie4u posted:Hey it couldn't hurt, post it up! So I just learned more stuff. This isn't simply a balance charger port...  It appears that the pinout is such that the pin on the balance port closest to the positive battery lug is the most positive balance pin, and they continue down the chain to the most negative, as you would expect. Not sure what the stuff on the board does but I've got some ideas and am going to see if I can figure it out. This is a 4S2P pack overall, and has 5 balance pins. The top one is electrically equal to the positive lug and the bottom one is similarly equal to the negative lug, they're only there for convenience so you can balance without hooking to the lugs as well. The other 3 are taps in between the 4 sets of paralleled cells as one would expect. The white silicone isn't only to secure the 5 small gauge balance charger wires to the back of the board - it seals the balance PCB to the top housing. They carefully put enough silicone on the custom housing and board, on both sides, to fully seal around the connector opening in the top housing even though the connector's not a waterproof one. Very well thought out product, I would prefer a waterproof connector but almost all balance chargers use this connector (99% sure it's the same JST XH connector everyone else uses, anyways) so I can see why they would use it.
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Mar 1, 2017 01:22
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Looks like it has filter caps and a couple of rectifiers to reduce noise on the circuit. Clean DC is the best DC.
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Mar 1, 2017 01:42
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I run a Shorai in my Aprilia Tuono. It is three years old, never sees a charger, sits outside, and sometimes goes weeks without starting. Never even hesitates when cranking over.
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Mar 1, 2017 01:43
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Well, I'm glad the Shorai I put in my old KTM 690 was worth the price. I hope the current owner appreciates it fully. Also I read all of that in AvE's Canada voice. Maybe I need to watch less youtube. Keep your dick in a-oh goddamnit.
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Mar 1, 2017 02:08
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The Royal Nonesuch posted:
Well with the level of teardown it's pretty darn close. And the words used definitely put Me in an AVE setting.
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Mar 1, 2017 04:17
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Fermented Tinal posted:Looks like it has filter caps and a couple of rectifiers to reduce noise on the circuit. Clean DC is the best DC. Nope. A lot of those are 100 ohm resistors, there are no rectifiers, and the capacitors are too small to be bulk DC filters. I will gently caress with it more tomorrow, my suspicion is that it is a low cost passive balance circuit (just discharges the strongest cells to match the weakest so the next charge cycle will balance better), a voltage limiter circuit, or maybe a remote sense circuit that uses the small smt r/c parts as a high pass filter to couple data transmissions onto the balance leads. Probably the first option. If I had to guess the SOT23-3 packages are a transistor and the SOT23-6s* are a microcontroller or lithium balancing ASIC. * or are those SOT353s? Can never remember. E: ffs cellphone autocorrect, balance not ballgame kastein fucked around with this message at 08:15 on Mar 1, 2017 |
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Mar 1, 2017 08:13
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clam ache posted:Well with the level of teardown it's pretty darn close. And the words used definitely put Me in an AVE setting. I dunno, that post was way too informative and the photos way too good to be from AvE.
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Mar 1, 2017 10:03
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That's because it was cherry picked photos. Get a few drinks in, video it all, and edit nothing.
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Mar 1, 2017 18:42
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SEKCobra posted:I dunno, that post was way too informative and the photos way too good to be from AvE. He shouted "Focus, you FACK!" right before each photo.
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Mar 1, 2017 19:48
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SEKCobra posted:I dunno, that post was way too informative and the photos way too good to be from AvE. Didn't talk about the type of plastic enough either.
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Mar 1, 2017 19:48
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DocCynical posted:Didn't talk about the type of plastic enough either.
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Mar 1, 2017 20:08
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Fiberglass reinforced, butylene overmould Fiberglass reinforced, butylene overmould Fiberglass reinforced, butylene overmould Fiberglass reinforced, butylene overmould
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Mar 1, 2017 23:49
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Glass Ball reinforced Glass fiber reinforced
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Mar 2, 2017 01:06
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Rectum fryer
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Mar 2, 2017 01:07
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I ordered something from China recently, and damned if he isn't absolutely right about the oily "China smell" inside the packaging.
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Mar 2, 2017 01:10
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There's also an India smell. Getting parts over 5 years for my Enfield from eBay, they come from India sewn into linen around the boxes, and they literally smell like grass and cow poo poo. No lie, no racism.
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Mar 2, 2017 01:14
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Metal Geir Skogul posted:There's also an India smell. Getting parts over 5 years for my Enfield from eBay, they come from India sewn into linen around the boxes, and they literally smell like grass and cow poo poo. No lie, no racism. Imagine if Harbor Freight would source 50% of their tools from China and 50% from India. That would be one weird loving aroma when walking into their stores from what you described.
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Mar 2, 2017 02:36
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C-Bangin' it 
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I always assumed they did.
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Mar 2, 2017 03:10
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kastein posted:Nope. A lot of those are 100 ohm resistors, there are no rectifiers, and the capacitors are too small to be bulk DC filters. In my defense: http://ca.mouser.com/Passive-Components/Capacitors/_/N-5g7rZ1yicowz One of these in say... 140uF for 14V would be marked 101 (I think?) and possibly around the same size as the resistors. My initial thoughts were sorta thrown off by the traces being hard to follow and the lack of ability to make out more than two part numbers. I saw three numbers and immediately figured "capacitor" instead of resistor, and that the 6-pin packages were rectifiers with the transistors being used as switches. The caps marked 331 are probably for decoupling. E: I'm voting the SOT23-3s as transistors too. Fermented Tinal fucked around with this message at 04:06 on Mar 2, 2017 |
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Mar 2, 2017 03:52
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No throttle 30% throttle  I think there's something wrong with my ambulance.
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Mar 2, 2017 06:34
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 I thought there was something wrong with the mirror. Nope, just a hugeass cloud of black smoke.
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Mar 2, 2017 06:47
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Nothing is wrong. Your company is just complying with new environmental regulations:  Sorry.
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Mar 2, 2017 06:49
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Trump  E: this is engine #3. Looks like it's going on #4 soon. We've had it...11 months and 45k miles. Queen_Combat fucked around with this message at 06:58 on Mar 2, 2017 |
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Mar 2, 2017 06:51
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Those pistons aren't going to melt themselves. Oh, its a Ford? Nevermind, they will.
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Mar 2, 2017 06:55
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NAVVIIISTARRRRRRRRR. Diesel fuel can't melt steel pistons  7.3 or 6.0?
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Mar 2, 2017 08:00
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I'm assuming 7.3, but it's a 2014, so I assume a fleet-only option. Looks like they discontinued the E-350 diesel engine options for non-fleet vehicles in 2003. The shroud on the radiator say PowerStroke. A gigantic portion of our fleet is 6.0hno's, though.
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Mar 2, 2017 11:54
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I'm always baffled at the size of engines in the US. The biggest one you can get in an ambulance here in Germany is as far as I know a 3.5 liter v6.
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Mar 2, 2017 12:43
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Shai-Hulud posted:I'm always baffled at the size of engines in the US. The biggest one you can get in an ambulance here in Germany is as far as I know a 3.5 liter v6. Have you seen the size of the people they have to move? My guess is just 'Murica.
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Mar 2, 2017 13:12
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Show me a Ford Truck with a small engine and I'm sure they'll build you an ambulance on it. Also considering the way the boxes are built they are probably pretty heavy too.
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Mar 2, 2017 13:19
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Yeah here in Europe they build them with balsa wood so can get away with not needing a 7 litre engine.
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Mar 2, 2017 13:36
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Blacknose posted:Yeah here in Europe they build them with balsa wood so can get away with not needing a 7 litre engine. The germans use aluminium sheets iirc. Here we don't have box ambulances outside of some prototypes, just some roof extensions.
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Mar 2, 2017 13:48
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Metal Geir Skogul posted:I'm assuming 7.3, but it's a 2014, so I assume a fleet-only option. Looks like they discontinued the E-350 diesel engine options for non-fleet vehicles in 2003. The shroud on the radiator say PowerStroke.
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Mar 2, 2017 14:49
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Metal Geir Skogul posted:No throttle What's wrong is that there was no 100% throttle  picture.
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Mar 2, 2017 15:14
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