Yoshino Solid State Battery Power Station, Test and Teardown!

Yoshino claims to be a US based company building portable power stations with true, solid state batteries. In fact, they claim to be using the worlds first solid state batteries. I decided to get one of their power stations and put their claims to the test.

Any support is appreciated. Thanks!

[bigtb]

Second update: I did some more research on the Safety Data Sheet that comes up from the part number/QR code on the cells. At least two of the chemicals listed are liquid, organic solvents, normally used as electrolyte in lithium ion batteries. So...

[corbinduncan]

Really appreciate someone actually going through and doing the work to validate yoshino's lofty claims instead of simply taking their bullshit at face value like Matt Ferrell...

[PowderMill]

Thank you! You just earned 7 subs….

We’re a bunch of firefighters who were anxiously awaiting a solid state battery solution from an AMERICAN company.
Our primary use is for powering/charging 2-way radio gear and drone batteries in the field.
We specifically avoided the newly released DJI Power unit(s) for those reasons.
With 11 vehicles to equip (replacing very old Jackery units), your work saved us a small fortune.

Thanks again!

[leonng]

Maybe its not your intention, but this a really crazy take down of matt farrell to the point where he seems to be negligent in making that video on yoshino solid state batteries. The battery part number being a lith ion battery is wild. Then the diagram of a lithium ion staring him straight in the face when buying the product. Jeez he don't seem that smart after all.

[GannDolph]

Good bust man. When a chinese company is selling something that basically doesnt exist, you know it's fake. Reminds me of the 'TrustFire' 9000 mAH 18650's...

[bigtb]

Update. I did look into that battery data sheet I found and it does seem to trace back to a Chinese company that claims to be making solid state batteries. So it's possible that the manufacturer of the cells is also claiming they are "solid state" batteries. I think they are more like semi-solid state. But at this point, I don't know if it matters. The stated watt hours per kilogram are roughly in line with typical lithium ion batteries, the Yoshino power stations charge slower than the competition, and clearly the batteries can and will catch fire in the right circumstances. So I'm not sure what kind of revolution their "solid state batteries" are. But I'm always happy to be corrected. So if anyone finds any contrary info, please share it.

And in case anyone was wondering if smoke and fire necessarily means Yoshino are lying; here are some quotes from their website:


_"Nail Penetration Test

The nail penetration test evaluates lithium-ion battery safety by puncturing to simulate damage and monitor reactions. Yoshino solid-state batteries did not display any serious reactions in comparison to prior lithium-ion models that displayed smoke or fire."

"Traditional Lithium-ion batteries pose dangerous potential for combustion due to their use of volatile liquid electrolytes, which can easily be exposed to air and ignite. On the other hand, solid-state batteries utilize nonflammable solid electrolytes - meaning even if they get hot from overcharging or current load issues, there is no risk of a fire occurring."

"Another significant benefit of solid-state batteries is their safety compared to other rechargeable cells. Since they don't contain the sameany liquid components or combustible materials"_

So they say in multiple places that their batteries contain no flammable materials, and won't smoke or catch fire when damaged. Just saying.

[edc]

When Matt Ferrell started raving about these on his channel I knew they were bullcrap. It frustrates me when these YouTubers get big, they don't take on scientist and engineers who can help them through the marketing crap, at this point they are making enough, I guess greenwashing is too much of a big business these days.

[yezhang]

According to the 3.72V printed on the battery pouch, it is Lithium Polymer battery. These batteries are a type of rechargeable battery that use a polymer electrolyte instead of a liquid electrolyte. LiPo batteries are sensitive to overcharging, over-discharging, and physical damage, which can lead to swelling, leakage, or even fires.

[Ray_of_Light]

Thank you for your work. Highly appreciated.
Sadly, I have seen other YouTube channels sustaining the lies spread by these companies.
Greetings,
Anthony

[Lazarov_Tweevles]

Thanks for the exposé! You've saved me (and perhaps many others) a lot of money. Even the name Yoshino connotes a Japanese company, as opposed to a Chinese one. I have nothing against Chinese tech or companies. I even lived in China for a while 30 years ago. There are many very high standard enterprises there, as well as many innovative technologies. There are also many disreputable ones ... like anywhere.

[andyvonbourske]

you saved me money i was thinking about buying that exact model after ! i saw a few " reviews" but neither went all the way and opened it up and i wasn't going to commit before knowing for sure because i suspected this very thing

[Ray_of_Light]

If you open a solid state battery, there is a layer of β-Alumina, a white ceramic material. This is the solid electrolyte which allows ionic flow.

[BrilliantDesignOnline]

Check out Undecided who proudly claims it is SS, and I linked your channel regarding this 660 watt unit.

[DiedLiu]

Thank for the teardown and battery puncture testing, that's what we need.

[AgozieAni]

Matt Farrel, your credibility has sunk, you need to decide.

[Sammy]

The funny thing is that that's essentially a liquid Polymer battery, technology which i believe Sony brought to market in 1998!

[pvanderwall]

Thank you for your hard investigating work. That was very helpful.

[ckm-mkc]

I have a Fossibot power station and when I asked if it was UL certified, they sent me the entire UL test It's been running as a UPS (8ms switching time) for a year, no issues.

[pxidr]

Undecided with Matt Farrell is again ridiculized

[AlternativePower]

Thank you for busting this power station. I was considering buying one for camping trips, but I am no longer interested in the Yoshino brand. Not because the batteries can catch fire if penetrated (I doubt if I will ever shoot an arrow or bullet through my power station), but because of the lies and deception from this company. So I'll just stick with my old Bluetti EB3A for camping power.