Yixiang V2 Is Here! - Is It Any Good!?
hey guys welcome back Today we are reviewing the Yang version two 48vt DIY battery kit In the previous video we did some stress testing on the components of the version one kit and found the circuit breaker to be insufficient This box is supposed to have an upgraded beefy circuit breaker as well as some enhanced safety features Let's get started Eva tape for the PCBs I like it already User manual Holy crap Okay so I got the version one white box on the left and the version two box on the right so we can compare them directly side by side So let's first take a look at the battery terminals We've got the same M8 style battery terminals We got two positive and two negative for easy paralleling They do come with these covers These ones came uh not installed so they're probably in the box But there's a trick to getting this off So you do not want to pull directly out You want to pull up and but more so you want to twist clockwise So if you give it a twist it'll pop right off But if you just try to pull it out you'll have a hell of a time So just remember pull and twist or twist and pull really and it comes right off Other than that everything else is pretty much the same We got the same design Power switches in the middle Got your BMS down here all our ports We got our dip switches run alarm state of charge dry contact RS4851 CAN RS232 and RS485 number two The grounding lug is the same It has not changed Moving on to the circuit breaker you'll notice this huge 250 amp DC- rated birectional circuit breaker That's important We'll cover that later Over here on the version one box we got this little rink dink 220 amp switch breaker Does work though I have tested it in the previous video But the main issue is this is 250 amp rated and this is 220 amp rated So we have 200 amp BMS in these batteries If you're pulling 200 amps an 80% duty cycle on the breaker would be you would need 250 amps 80% of 250 is 200 amps Over here we have 220 So that's insufficient at 80% duty cycle I will cover the biodirectional breaker a little bit further on in the video Okay moving on to the side of the box Version one box is completely covered There were no ventilation holes here Here they have added ventilation holes and that's because there is a fire extinguishing aerosol built inside the box We'll cover that later As far as the side latches are concerned they're exactly the same The handles are exactly the same So no changes there And looking at the other side we have our ventilation holes again So we got vent holes on both sides of the case Looking at the back of the box no changes there Okay let's talk about the casters real quick You can get these casters optionally They're 40 bucks extra but they can only handle about three boxes added on top of them I've been using these dollies and they work great I recommend using these over the casters The metal where the caster mounts to the actual box starts to break down and bend So what these companies are now doing is building these carts They're getting away from the casters and they're just using these carts instead So about the biodirectional breaker the reason why that's important because in a solar system you're either charging or discharging the battery So the current is actually flowing either direction So the breaker will still work in any direction Also if you had an internal short in one of your batteries all the other batteries in your battery bank will dump into that single battery That's where the birectional circuit breaker is useful Let's get it on the bench So I noticed when I was removing the cover to the box the screws are a bit larger So this is the larger version two screw and this is the old style version one screw So it's the same threads The head on the version two screw is larger and it's about 2 mm longer Same thickness on the threads I also want to quickly show you the user manual We'll cover this more during the build video So I'll be shooting this shot wide angle so we can see the uh entire box overhead So there'll be a bit of a fisheye going on So that's what that is The box is not bent All right so here's the BMS accessories Everything comes just like this how you see it shipped very nicely packed All right let's check out what we got in the box We got our bus bars of course These are the flexible red copper bus bars double hole studs These ones go on the cells And we got our big aluminum They gave me an aluminum one What so I'm going to have to complain about that I have a spare from another battery but this should be copper too What the heck this is the bridge bus bar This goes between the two 24 volt packs on either side It's really annoying And we got the shaded head M6 stud bolts So that's really great We don't have to worry about these getting up to 200° Please see the previous video about that We got our comms cable and zip tie And we got our external battery terminal covers Somebody messed up on this This is not even flexible It's got the What the heck it's got the ridge as if it were right but it's not even It's totally rigid So what i'll be talking to Becky about that Okay so this is the copper bridge bus bar This is the only one I've ever gotten was the copper one So I have no idea why they sent me this janky little aluminum one Very much lighter So yeah Hopefully this is a one-off thing and they just I don't know screwed up But I'll ask Becky about that And uh yeah so still some consistency issues All right Well let's remove the PCB boards Can't see what the hell I'm doing over there Okay finally All right so we'll talk about these later For now I just want to continue showing the inside of the box Here we have our epoxy board and our Eva tape This epoxy board is definitely thinner I can tell that Here's the old board from the version one box You can see through this Okay moving on to the fire extinguishing aerosol This is the sensor lead And what you'll do we'll cover this in the build video You want this to cover as much surface area as possible So you're going to wrap it around all the cells on top of the cells You want to contact as much surface area as possible so it can detect any fire So this works on flame It detects the flame And I believe it triggers at 350° F I'll put a picture here that shows the model number This actually feels very fuselike Yeah it's like a feels like you know those old firecrackers like a paper on the outside It's a bit squishy I don't want to trigger it This thing emits at the rate of 100 g per meter cubed it looks like Anyway don't want to be near that when it goes off And so Yang sent me a sneak peek video of the fire aerosol extinguisher in action during testing Let's take a look Come up Come up That was pretty cool right so we saw the operator had to actually go and physically ignite the fumes coming off the LP cells That's because LP cells are not directly combustible They do not have thermal runaway So they cannot self-combust but there has to be a ignition source nearby Now one thing I noticed is all the fumes did not ignite We saw the whole room was filled with the smoke but only the only the smoke directly near the battery ignited into flame and then the aerosol extinguished it really fast It's only one and done So once it's done it's done If you have an ignition source that can't be put out near the battery it could ignite again So don't build your battery bank near an ignition source Lipf is considered to be one of the safest chemistries on the market That's why everyone uses them However it's worth educating yourself about potential risks So in the description below I included a video I found that I thought was really interesting about some events that happen with LAP cells So please go ahead and watch that Basically it speaks to not allowing the fumes to build up in a confined space That's where a potential problem could occur So check it out Let's take a look at the PCB boards Version one Version two The first thing you may notice if you look close we have a completely redesigned PCB board Finally no more tape no more insulating your screws and no more screws with washers that can potentially short out your BMS Look at the heads They're smaller and there's no washer FDC 48VT 300 JH So I think this was more of a generic PCB that many manufacturers were using But Yang check this out Yang 48300 A01 And A01 represents typically on PCBs the first revision of a board I'm assuming this is Yang's proprietary design These solder joints have been covered with glue This is something I complained about in the version one PCB All the solder joints are exposed That's a very nice touch You can see the traces are completely redesigned to avoid the screws Now they only still include three screws I believe it's one here one here and one here But there's plenty of room when the screws are actually down into the PCB board So that's best case scenario and it looks like that's worst case scenario However they do not include a screw in this particular location So make sure you're using screw holes that avoid the traces Version two you'll notice if you press down there's no give Well a little bit That's because it's not mounted But on the version one if we press down look at that Whoa bad There was no support underneath the PCB where the connector where you're plugging in the connector all the time you could potentially weaken the PCB You'll notice on this one they put a pad here so it's completely supported underneath the connector and they insulated with glue as well on the back side of the connector All right let's take a look at the back side of the PCB So we're flipping over version one here Flipping over version two Now look at these screw holes Look at the difference Look how close this is to the trace Look how far away it is from this one Same here And same over here Now could they have optimized this yeah sure they could have I don't know why you have to have these huge massive traces but I'm sure they have their reason But at least we got finally a new designed PCB So that's great Taking a look at the B board Just a quick sidebyside Everything we saw on the A board pretty much exists on the B board Last thing the EVA tape If we flip this board over Nope No EVA tape there It's not here either Where is it where's the Eva tape it's on the back of the It's on the It's on the back of the rail Like what is the point of that the whole point of the EVA tape is supposed to go underneath the PCB to protect it from touching the metal What's up with that now you're probably wondering "But Nate you got Eva tape right here Just stick it on the PCB board." I forgot that I actually told Becky that I need Eva tape for the version one box These do not come with the version two box Whatever is on the back of that rail is what you get So these are extra You won't get these There's no EVA tape underneath the PCBs Okay let's pull off the face plate and look at the internals Yeah want to come off All right So it looks like this cable is holding the face plate from coming down So we're going to have to remove that one And there it goes Okay So the first thing let's talk about these battery cables The P positive coming off the breaker The P positive going to the battery positive terminals the P minus coming from the BMS and also the battery minus coming from the other side of the BMS All the cables 1 two three four So early versions of the box came with these battery cables and these battery cables were found to be insufficient Now you will either get a box a supplemental box of copper bus bars to replace the cables with or the box will already have the bus bars pre-installed I got the supplemental box Let's take a look So I was looking through these Look what I found I found another I found the copper bridge buzz bar So they actually sent it in the box So you'll have one two three four So here's everything I got We'll replace these during the battery build video This image shows the bus bars installed Here we can see the instructions on how to install the bus bars All right so the first thing I want to look at is this monster circuit breaker Look how huge this thing is It's like 6 in long and 1 and 12 in wide But look how big these screws are I was looking at these screws They practically touch the uh pressure plate There's like a quarter inch of space That makes me nervous I want to take a look underneath this epoxy board Just to show you the hardware they use to put this thing together there's these six massive screws here You can see how big the lugs are for the battery cables So plenty of contact area for the battery cables So just like in previous boxes we've seen these spinning knobs here Looks like they still like to use those I guess if it works don't change it Even though it looks ugly actually Actually the white box that I have have these little tabs I'll I'll put a picture up These nice little tabs that just clamp it in I don't know why they just don't stick with that Looks like they're using M6 screws and lugs for the main connection to the battery positive and battery negative It looks like a pretty good size So I think it can definitely handle 200 amps Just by the looks of it looks like they're putting the entire cable still in the battery box So comm's board is still in the same place Pretty much everything's the same except for this massive breaker over here Make sure when you get this box that you open it up and check all your connections especially the main battery terminal connections up here and your comm's connections over here on the comm's board Okay let's remove the face plate and uh take a look at the pressure plate and the BMS Let's disconnect our comms cables here carefully Don't forget our display Looking at the BMS first thing I notice is they put heat shrink wrap over the inductor here I'm not sure what this could be for either RF shielding or most likely they just want to protect the coil from rubbing against this outer plate here Anyway same as usual I think this is a newer BMS version I'm going to have to check the app and see what version I got It'd be really cool if it's a version 19 but I don't think so It's probably somewhere in between Anyway we got our typical uh battery positive or power for the BMS This goes on your main battery positive Our comm's cables over here Display cable here And over here we have our balance leads So make sure that these are all secure when you receive the box Per usual we have our six M6 bolts holding our pressure plate to the case Look how long this thing is Jeez I really like this hardware that they give you The stainless steel bolts are about an inch and a half long That allows for a lot of adjustment So you can have a lot of different cells in this box Accommodates a lot of different cell manufacturers And there's the plate Not much to look at with the face plate removed So you can see inside the box You can see I I put the bolts back where the face plate mounts to the chassis So you can see that really clearly Got our middle rail here Our two side rails here I wanted to do a quick overhead shot of the BMS on the face plate And uh should I remove the BMS sure why not you guys are so convincing Now if you guys have been watching my videos for any length of time you probably noticed I never use any power tools I have a pet peeve with power tools on things like this I'll use them in places where they definitely have a need have a purpose but when it comes to like small electronics I don't know I just I just believe there's nothing better than the good old feel the hand basically Probably cuz when I was a kid I was poor and I couldn't afford power tools It looks like we have the PB2A1 6S20P So that's 2 amp 16S 200 amps output 200 amps continuous 2 amp active balancer 350 amps max surge and look it'll actually do 8S to 16s You can actually use this on an 8S pack A 24volt pack All right let's scan this real quick See what we get It's probably just going to take me to the uh documentation website Oh check it out 2018 to 2021 Yeah So that's just the uh the website to download the app and the manual So I was hoping to get the version number These logs definitely seem sufficient for 200 amps So I'm really curious now These are 125° C Celsius insulated just like the cables on the version one box I don't know what size they are but they're doubled up It could be four If that's the case if they are four * 2 then technically with this insulation it may be able to we might have to actually test these cables They're not used in the boxes so I don't know what if it's even worth testing But maybe if I'm bored I'll do it So it looks like EANG's primary focus this time around was safety and I think that's a step in the right direction Personally I like to have multiple layers of protection So I have the breaker that's built in the box And I also like to add terminal fuses And here's what the terminal fuse looks like when it's installed on the battery terminal So the uh fuse holder will mount right to the terminal and then your fuse installs onto the fuse holder With the terminal mount fuse the entire battery cable going from the battery all the way to the bus bar is protected These fuses are made by Blue Sea and are marine rated and have a AIC value of 2,000 amps Link below So Becky told me there are a few of the version two boxes still in the US warehouse They also have a gray box but it's China order only Prices on Alibaba will be for the box only It will not include shipping and will not include the price of the cells Be sure to ask Becky about the sales what manufacturer you want and what capacity you want They carry all the brands that I listed earlier in the video If you're going to order from China the easiest way to do it is to click on the link the Alibaba link I provided in the description below You can also check my website for more details link below So overall I give this box a five out of five I think there's very few things they could do to really improve it It's just minor like the Eva tape under the PCB just stuff like that As far as the hardware and the construction all the fastening hardware the screws and bolts and the construction of the box I think it's really good That's it That's all I got for this video Thanks for watching and I'll see you on the next one If you can't wait for the next video check out this one right here
2025-04-03 12:38
