Ozito Power Xchange 4Ah Battery Strip Down
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- Опубликовано: 7 авг 2024
- JLCPCB Prototype for $2(Any Color): jlcpcb.com
Teardown of the Ozito Power Xchange 4Ah power tool battery.
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50mA may be small, but when you consider that it is always there and even when the tool is sitting on a shelf for a month, it will be doing its thing to balance, having it always in place will help to ensure it doesn't go out of balance by too much in the first place.
My Einhell 4Ah battery thinks otherwise ;)
This explains why my ozito batteries seem to last so well both longevity and capacity (haven't had one die yet). Nice one Mr Einhell Ozito and thank you too Mr. Julian Ilett!
I've found most quality name brands have balancing, it tends to be skipped by the cheaper tools in some cases.
That small amount of balancing in this one would do it's job quite effectively. Can't expect perfect circuits from a cheaper brand :)
Thanks for the tear down
ALDI sell 4 amp hour lithium ion battery for just $29 as opposed to up to$100 for ozito Chinese made rubbish.
The ALDI lithium ion battery is also far superior made in South Korea and has way more actual usable power, despite the ridiculous claims made by ozito regards their actual AMP power
50mA bal is ample current. If engaged during any and all operating time, the cells would be brought to a balanced state over time. If the Bal couldn't keep up with the differentials the pack is dead meat anyways. I'm using 80ma Balance circuits to maintain 50Ah Lion Brand cells and it does the job. Slow but sure they get there. Again if the bal was to become not enough, the cells really shouldn't be being used as that group of cells. Starting with New cells or at least cells reasonably matched in capacity they don't go out of balance much anyways. My Nissan LiPo modules are all so close in performance I wouldn't hesitate to do without a bal circuit in place. Simply Manual Balance them once a year or so. They may not even need that.
Einhell bought Ozito brand to get into the Australian market as Bunnings wouldn't import Einhell so now Einhell own one of the brands bunnings was already selling - Ozito. At 1st you could rip the label off the new red Ozito's and find Einhell written underneath, but they now have their own skins and are alot cheaper then Einhell brand :P
Maybe they do (coarse) current measurements over the MOSFET using RDSON and RT1 is used for temperature compensation. Won't give very precise results unless properly calibrated, but most likely good enough to detect external shorts of the battery. Could explain why there seem to be no fuseable sections in the metal strips as seen in other packs.
edit: I also tried to find a datasheet for the TS1102A but the only thing i came up with is that it's most likely an outdated Renesas MCU. Sadly no luck finding any specifications.
I’ve got a few questions about the balance circuitry (BC);
1) Are there pairs of cells connected in series and then two of these pairs joined together in parallel? (Two blocks of 4 and a block of two)
2) Does the BC try to level up the amps available in each block of cells by charging it from the block with the highest amperage?
3) To do this it presumably has to monitor each of the blocks?
4) I’m assuming the BC monitors current as Julian talks about a 50mA shunt current, but I may just be confused and it does its work by measuring voltage? It may even do both?
I’m a bit out of my depth here, so any help is appreciated. Just trying to expand my knowledge in these days of lockdown.
Another great video 👍
Free Education dood 👍
@@subigirlawd_7307 cool dude 🥴✌
@@subigirlawd_7307 i saw some electronics stuff on your channel that's great keep up the good content Buddy.
I took it apart and measured each cell....and i noticed that some have different voltage than the others...And both green and red light indicators on the charger are bother flickering which the manual says is indicative of a defective battery....Will changing those oddly low voltage level cells fix it or do I need to get a whole new pack???
"Look Upable". LOL! Genius, Julian. You and I were cast in similar molds! (HBO's "Not Necessarily the News" would call that a "Sniglet". Example: Aquadexterous. The ability to control the hot and cold controls in the bathtub, with your feet. "Look Upable" is self explanitory. :-)
Isn't it obvious it has balancing because of the inter-series connections? (not sure of the proper term for that.... Centre taps??). You can see the metal strips going to the 4 connections between the 5 parallel pairs of cells.
I just decided to go with ozito pxc range. Pretty good for the price.. 👍
I have a 3ah 18v ozito battery. It charges perfectly.When fully charged and I put it in my drill,the drill won't turn on.Drill works because with my other battery it turns on no problem.Would there possibly be a thermal cut off in the circuit board preventing it from working?
hey ya, i'm on my way to bunning now to get the 4.0 battery now they have a black edition , apparently a promo item $20 aud cheaper then the regular edition , be interesting to see if the batteries are of a lesser quality for the purpose of selling the item cheaper , thanks on the tip about einhell , wow there dearer than ozito almost double
Thank you for the video.Very usefull to me.
2:40 You had me there for a moment. The battery charge indicator is still working disassembled?????
Oh, different power bank! 🙄
Sir, what are the series voltage? From that we will now if it balancing.
What is the cut off voltage? If I use it in some projects, how likely it is to go lower than BMS chip is prepared to take it to?
Looking at 3:33, are those spot welds onto the cells themselves? Or is that black sleeve a structure that makes it easy to replace the cells? Ta!
Nice work. Thanks. Resistors R1-R5 51ohm would be for balancing.
A bit late I know, but I got the ozito power station to run my Arduino, BUT it only runs for a few seconds and then turns off. Have I gotten a dud or is there not enough power being drawn to keep it active.
I have a whole bunch off Einhell equipment kicking around, and from what i've seen it's all identical to the Ozito tools. Einhell even has a walk-in outlet store somewhat near me where i purchased an 'Ozito' branded impact driver for 25€ - that thing even kicks the lug nuts off my car. One of the batteries i grabbed even came labeled in turkish. Oddly enough while looking around online i saw some Ozito equipment that isn't even offered under the Einhell brand, specifically the battery-powered fan caught my interest.
Have had an Einhell - in fact 'Royal Einhell' - mains electric strimmer for 10+ years. Great little machine and still easy to get parts for it.
Einhell bought Ozito to get into Bunnings warehouse Australia and rebrand Einhell products selling them cheaper under the Ozito brand. Me mates label came off his ozito drill and iut said Einhell that was in the beginning, now they have their own labeled skins.
Anyone know which other brands are interchangeable with the ozito pxc batteries without an adaptor? I can't afford to experiment. I have a PXCLMK-1418 lawnmower.
As others say these are the same as Einhell certainly looks lke it but that is the only Identical fit one as far as I know. As somone else said, most of these batteries have cell balancing logic in the battery pack now even chepo Parkside (LIDL) ones. Not sure about DeWalt as have not taken one apart but they uniquely have conections for each cell (or cell pair) on the battery and charger and are marked as such. I have changed the odd dead cell which is not easy to identify or do physically in 4000mAh or above packs with paired cells, really have to be careful to chose near identical cless but have had success even soldering rather than welding connections. Good video - saves me taking one apart.
Has anyone found an adaptor to use these with DeWalt or vice versa??thanks
Possible to reset the mcu, so I can fit new batteries? the red light on the charger is flashing.
so does this mean the chargers are just a power supply and all the peak detection/management is done within the battery itself?
we cant get the car charger in Aust (einhell do sell one but not ozito Australia) and im wondering if i can use a car laptop charger set to the correct voltage (21volts) to charge a battery when camping?
i'd cut the pxc connector off the standard slow charger and wire it direct to the laptop charger. all i need do is double check polarity is correct and the voltage from the laptop charger and the battery circuitry should do the rest?
Just get a 300watt pure sine wave inverter.
You can than plug any 240volt charger into it.
Hi i have a battery pac with 5 s 2p cells and it have 20v but it shows only 2 of 3 loaded led what can be the problem? How can i reset the bms?
can you please tell me which screwdriver you used?
Many of the 18V lithium packs have the balancing in the charger. They pull the balance lines out to the connector.
By "many" I mean name-brands like DeWalt, Hitachi/metabo, etc.
@@JamesPotts yes. My makita has multiple connections to the charger. I haven't pulled it apart though to see if there is any sort of BMS in there.
Could you charge one of these packs without using the matching "charger" i.e. is the internal circuit managing the charging?
AFAIK (which is not much) you the chargers just use two pins to charge and the battery balances the cells. So you can throw any 18v charger through it with some success.
Just checked all my Aussie Ozito batts brought in the last 18months, none have the EH logo...
Can these batteries be put in series to get 36 volts
I presume the low current source 50ma for the balancing of the cells only actually kicks in once the total sum of all cells reaches 20v..So I would imagine there hard charged up to almost full.. From then on this little unit probably kicks in and trickle charges each cell to 4.2v..
I know my lipo charger for lithium polymer batteries charges very quickly, then at roughly 4-4.1v per cell it actually starts to balance each individual cell.. Literally the last .1 of a volt takes 20 minutes sometimes depending on the size of the pack or the amount of cells..
What vintage are these batteries? I pulled apart some late-2019 ones (date code roughly 1940) and they've changed the design, just a single QFP32 chip identified as an AFM8116 rather than the separate charge controller + MCU.
Hey Dave, would you mind uploading an image of the PCB in your battery pack (e.g. to imgur or any other image upload site)? Julians packs use the 2014 version of the protection PCB and i would really be interested in what else they changed.
@@bernhardreinel Already done, see imgur.com/gallery/A9HH63A, with some thoughts on what's changed. I'd love to get feedback/comments on the unknown devices mentioned there if anyone knows anything.
Well, clearly, you are going to have to discharge one group, and see if the cells balance over time. I predict a ryobi meter party soon!
can i use this battery to my einhell blower
I wish I'd known the Ozito/Einhell connection when the local Homebase was forced to close down unexpectedly last year. (PC World took advantage of the CVA and made the landlords an offer they couldn't refuse.)
I wonder how long these cells last...I need to re-cell my Blade 2 Max vac...$48 for a 4.0Ah Ozito pack 🤔
You say you use this to drive your workshop fan .......what terminal arrangement do you use to tap the battery..??
I suspect it was a mis-speak... he's been using them with a USB power adapter to power the shed fan CONTROLLER... the fan itself was being run from a pair of lead-acid batteries.
I wish these power packs were standardized, I think I have
multiple manufacturers ones.
That wouldn't be any fun at all - here's to 50 different battery styles :)
I've seen plenty of people coming up with 3D-Printed adapters - most power tools don't bother communicating with the battery and are just happy with whatever 18V/20V DC they are supplied with.
there is a Cordless Alliance System in EU www.cordless-alliance-system.com/ lead by Metabo. But the brands in the alliance are non-competing anyway.
I've designed and printed adapter between Einhell Classic 18V battery and cheapo Tesco "power" drill. Worked fine for years so this could be a way
Yea theres plenty of adapters you can print on thingyverse if you know someone with a 3d printer.
@@mrsmith160 Many councils have one, our public library has one.
ICR is the most volatile of the chemistry types, i think. I think they have very high amperage output though. ICR cells are the ones that were exploding in vaporizers.
Also, i looked at my dewalt packs. I don't think they have balance charging built into the battery. However, there are terminals on the pack, ID, C1, C2, C3, C4, TH and B+/B- so i think the charger handles the balancing. cool video!
Lithium cobalt batteries were also responsible for the Boeing 787 and Samsung Note 7 fiascos.
Ozito is still going strong down under, it was started in 1993, and for many years has been the entry-level house brand for Bunnings (the large(st?) big-box hardware chain in Australia - who owned Homebase in the UK for a while). I wonder if the range of tools was the same as down under in the UK, or were they just relabelling someone else's EU-approved kit.
Cells in my 4ah are actually yellow brown , guess they source the cells from wherever they can.
Where would I take one of these to get fixed?
3 year replacement warranty at Bunnings
The original Ozito range was a really cheap and nasty home brand for bunnings but with Einhell buying out Ozito brand to get a foothold in australia there tools have dramatically improved. You still find the original cheap Ozito tools sold and they are still that grey colour but all the red coloured tools are Einhell tools hence the better quality and higher price.
I read somewhere that Lidl's Parkside range is made by Einhell if so, the batteries should be similar.
Definitely not compatible. I recall even the polarity on the terminals is the opposite way - so it's probably a good thing the battery sled doesn't fit either. Also the 18650 cells inside the newer Parkside tools are branded "GRIZZLY" i think.
@@Sprengi86 I can confirm that, our 2014 10.8V parkside cordless drill says "Grizzly Tools" on the label. The battery has a BM3452 inside, the cells have a blue transparent wrapper and have the folowing markings:
C18650P-1300mAh
Li-Ion 3.6V
PULY® 03-14-11
I have Ozito and Einhell tools. Both battery work fine in with each other's tools. Looks like Hombase sell the Ozito brand here in the UK. I think Einhell bought the Ozito brand, and was an Australian brand. Name comes from Ozi tools apparently.
Now I have had 2 of these packs fail, fully charge and give out the 18v but when used in a tool they cut out. I guessed it was an over sensitive protection cricut.
I have a fully charged 18v 3ah battery that's failed.Cuts out as soon as I start my drill.Any idea which component it is on the circuit board and It can be replaced?
I read that Einhell produces Lidl's Parkside tools, so it might fit on there
Einhell supply grizzly, grizzly do parkside and florabest for Lidl. Grizzly say they use Samsung cells. Parkside cells are wrapped as parkside and in the past grizzly. Parkside cells discharge graph looks and smells like Samsung Q series cells. The tools in Aldi mimic Lidl but the worx batteries have a low volt cutout which lidls do not.
parkside 20v have internal balancing when charging, but do not have over discharge protection in the battery pack, its in each tool...so dont over discharge!, and if you do that, then they cant be recharged they go into a permanent lock out......
@Schwalbe262 I've used a balance charger to bring all the cells to 4.1v, once the BMS chip detects a low cell it will no longer send the signal to enable the charger, it's a safety feature that makes you buy a new battery... I should point out I own at the last count 68 parkside 20v batteries so I do have a spare one or two to experiment with
@Schwalbe262 there is no way I have found to reset the original chip to a non fault state. You need the original chip to send an ok message to the original charger. Unless you can reset the chip to do this, then all you have is a pack of cells for a DIY project. Actually miscounted, I have 74 packs. 60 of them are to be disassembled for a small DIY power wall project, that will leave me with 60 useless chips I can't reset..... These are the only packs I have seen behave this awful way
@@lezbriddon I found - from a tip elsewhere that if you get a Parkside 18/20 Volt battery that won't charge as it is too low (usually due to a duff cell) connect it in parrallel with a good batery for a few seconds just to bring it up a bit, then it will charge with a Parkside charger but usually means it needs aecell replaced or the whole pack, but they are a sensible price anyway and I have only had one dodgey one out of 10 or more. I guess the same trick would work for other makes. I believe the newer Einhell chargers can manage a really low battery though.
@@scorpio32 yeah that can work with other batteries but once a parkside battery protection ic locks out, it will never handshake with a charger again. I've about 4 dead parkside batteries all with good cells all balanced with a decent lipo charger for my drone batteries etc, all killed by discharging too far and tripping the chip.
I also have 75+ PCBs that had never seen a charger from batteries I took apart for the cells that also will never work again
Thanks for your comments. Thankfully I had never got to the lockout situation with Parkside Li-Ion batteries - will investigate one day when I really have nothing else to do. I should have added that you really need to use a hefty low value resistor if you connect 2 batteries together as a current limiter. Like you I have a decent balance charger I can test/charge cells with. Suppose all this should be on a Parkside blog really
Ozito was the most frustrating a wrong decision I've ever made, have since used a BNPL scheme to purchase a quality brand since the Ozito batteries constantly died even when charged early and kept cool, 3 Ozito tools also died under low loads ... even though under warranty I live 98k's which due to some winding roads is up to 1.5 hours each way to the closest Bunnings ... to keep using the Ozito stuff I still have I repacked the batteries with Samsung quality cells purchased cheap through Amazon, my Ozito batteries had generic cells, no marking whatever on them.
You must have been unlucky, I have several Ozito tools I have collected over the last 15 years, for the loss of just one battery. Just bought two batteries, 2.0 ah with chargers $19.99 each. How do you beat that ?
I have a few einhell tools I have the drill the impact the radio and the led light I have a 2ah 3ah and a 4ah I use them on the daily as my main tools and have never let me down the only thing I've had problems with are the chargers die quite fast
Ozito Einhell and some pattfield Tools. Pattfield ist from Hornbach.
Is 'Ozito' Australian slang for Ozzy acne?
nope, just a brand lol.
Yeah nah yeah nah yeah nah mate.
O'Zito sounds more Irish than Australian!
Ozito is a contraction of "Ozzie Tools" ( Aussie Tools)
@@seanrodden6151 I think it sounds Spanish, - ito being what you add to the end of a word to mean "little".
So, Sean-ito would mean 'Little Sean'.
The worst batteries I have found were Makita, an expensive lesson learnt after purchasing my drill. There was no sign of balancing circuitry when I dismantled it. Battery died after one cell went low.
10S20 as frig
I rather like the look of these units. Ive seen much worse
Are you copying my vlogs from a Year or so ago. Lol
So insecure
Finally first. :)
Nice video, plz keep your videos short like this one.