EGO 56V 4Ah lawn tool Lithium Ion battery

Batteries, Chargers, and Battery Management Systems.
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mistercrash   10 kW

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EGO 56V 4Ah lawn tool Lithium Ion battery

Post by mistercrash » Jul 16 2014 10:01am

Image

I searched for this in here but couldn't find anything. What's in it you think? 18650 cells probably but which ones? The 4Ah model is $200, the 2Ah model is $130. I can't afford to get one right now just to open it up but I'm sure one of you can do it.
Send $10 at paypal.me/Ray1964 and you will be in my thoughts and prayers.

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ambroseliao   100 kW

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Re: ego 56V 4Ah lawn tool Lithium Ion battery

Post by ambroseliao » Jul 16 2014 11:03am

http://www.ebikes.ca/ is the best!

TidalForce M-750X, Tidalforce S-750 with Crystalyte HS3540, 1x TF iO-X Cruiser. E+ 1000W hybrid bike. ebikes.ca DrainBrain & Cycle Analyst meters. GoPro HD Hero2 camera. Bosch Fat Packs, 37V 10Ah LiPO pack. Turnigy Multistar batteries
My blog: http://ebikerider.blogspot.com
Remember LiFEPo4 HVC is 3.65V and LVC is 2.7V

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mistercrash   10 kW

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Re: ego 56V 4Ah lawn tool Lithium Ion battery

Post by mistercrash » Jul 16 2014 1:34pm

Thanks ambroseliao, funny thing is that when I searched for it here, it came back with either no results or 354 pages of unrelated threads.
Send $10 at paypal.me/Ray1964 and you will be in my thoughts and prayers.

Matt Gruber   1 MW

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Re: ego 56V 4Ah lawn tool Lithium Ion battery

Post by Matt Gruber » Jul 17 2014 10:42am

if 56v is exactly right for your build, i can see the interest.
BUT for 36v or 54v or 72v the dewalt dcb204 is hard to beat. 18v 4ah packs 2/119 free ship. locally sold and serviced.
each pack has 8 terminals so every cell pair can be checked/charged.
and NO china cells, and no bms (smart engineering like bosch)

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mistercrash   10 kW

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Re: ego 56V 4Ah lawn tool Lithium Ion battery

Post by mistercrash » Jul 17 2014 5:44pm

From what I saw on the thread linked by ambroseliao and from what I could find myself, it looks like there are many other choices that are much better than this EGO battery. It looks like it uses some little prismatic cells (UF553450T) that have a poor C rating and I'm sure I saw cells like that in old cell phones and camcorders.
Send $10 at paypal.me/Ray1964 and you will be in my thoughts and prayers.

m52 power!   1 W

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Re: ego 56V 4Ah lawn tool Lithium Ion battery

Post by m52 power! » Aug 20 2015 9:09am

All,

I disassembled my own 2.0Ah 56v pack to see what's inside. The assembly is very nice, the BMS is fully potted and there appears to be a secondary board that talks to teh charger and the device it is powering. There does not appear to be an actual pack disconnect device such as a MOSFET bridge, instead the BMS talks to the tool it is powering and tells it to power down.

Under the heatshrink the cells are 18650's covered in a thermally conductive polymer sleeve to act as heatsinks and increase surface area, pretty clever design.

I peeled back the covering on one cell and it is red. I believe the cells are Sanyo ur18650rx.
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spinningmagnets   100 GW

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Re: ego 56V 4Ah lawn tool Lithium Ion battery

Post by spinningmagnets » Aug 20 2015 9:38am

Teardown video, opens up pack at 5:30. He claims the black sleeve is phase-change just like All-Cells packs.

https://www.youtube.com/watch?v=lRdBS9oFUXc

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Re: ego 56V 4Ah lawn tool Lithium Ion battery

Post by Scottydog » Aug 20 2015 10:41am

I just deleted my duplicate post of the vid. Nice investigation. I purchased a bunch of their tools for our school, blowers, strimmer and now hedge trimmer. I ordered another 4AH battery, but just found out they do a 5AH and 7.5AH! :( So bummed about that as the extra capacity would not have been missed!

markz   100 GW

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Re: ego 56V 4Ah lawn tool Lithium Ion battery

Post by markz » Sep 15 2015 7:37pm

http://www.batterysupports.com/sanyo-36 ... p-370.html
Rates the Sanyo ur18650rx at 20A discharge rate.

It would be nice to confirm those are the cells in the pack. Because a lot of Sanyo cells are red.

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Re: ego 56V 4Ah lawn tool Lithium Ion battery

Post by Hillhater » Sep 15 2015 11:21pm

markz wrote:http://www.batterysupports.com/sanyo-36 ... p-370.html
Rates the Sanyo ur18650rx at 20A discharge rate.
possibly so, but at that level they are working at <3.0 volts /cell, so that "56 volt" pack is only going to supply <42 volts ! :shock:
This forum owes its existence to Justin of ebikes.ca

aelb771   10 mW

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Re: ego 56V 4Ah lawn tool Lithium Ion battery

Post by aelb771 » Nov 08 2015 10:41pm

If anyone happens to be in the Cleveland (or Detroit) area...I have 4 of the Ego 56V 2AH batteries that I'd like to turn into a battery for my scooter. Unfortunately I don't have the electronics knowledge to do so myself. But if anyone in the area is interested, I'd be happy to compensate you for your time.

Thanks!!

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Re: ego 56V 4Ah lawn tool Lithium Ion battery

Post by bluovalguy » Dec 30 2015 8:14pm

I picked up some used 2.0a batteries on ebay to play with. One seems to be bricked so I didn't mind tearing into it deeper. As M52 already mentioned, the protection must be built into the tools. The main terminals are wired directly off the cells. Also, confirming this 2.0 battery is 14 cells in series.

The heat sink around the cells is some sort of fiber reinforced plastic. It almost looks like there are specks of copper in it too and it's very brittle. (See photo.) I'm skeptical of the claim about this material being phase changing.

The only marking on the cells is: TAB4RXA, followed by a 6 digit # that is different on each cell. This doesn't mean anything to me... any ideas?

The really interesting thing to me about Ego 56 is the 7.5a battery. It's about the right size for many bike applications. Also the 14s voltage is good for a boost on most 36/48v setups while staying under 60v. Some of the tools look pretty awesome too like the mower and a 480cfm blower. The quick charger looks decent too. The battery is expensive, but it's about the same per WH as any other tool battery.

There's also an interesting looking 80v line of tools by Greenworks now, but no high capacity batteries yet.
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jateureka   10 kW

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Re: ego 56V 4Ah lawn tool Lithium Ion battery

Post by jateureka » Apr 14 2016 4:31pm

I saw a photo on an Aussie web site of a custom cruiser e-bike powered with these batteries.
The batteries come with a 3 year warranty.
E-bikes: Bafang 8FUN; Mac; Ezee; FreeGo; Aprilia 7s LiPo; eLation V2; TerraTrike recumbent
E-motorbikes: ZEV 7100 LR scooter, 84V 60Ah LiFePO4.
ZERO 2011 S motorcycle, 51.8V 70Ah LiMno2, 2012 headlight, Kilovac EV-200 contactor
E-mower: EGO 56V mower & line trimmer

markz   100 GW

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Re: ego 56V 4Ah lawn tool Lithium Ion battery

Post by markz » Apr 14 2016 5:00pm

What are the battery cans themselves. That seems to be the elusive info, because people go through the motions of opening it all up and are too wimpy and chicken $#^@ to actually see what the cans are. Its just "Look at me and my video" type of stuff. Grade school stuff really. Like the people making video's that repeat themselves, its annoying!

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Re: ego 56V 4Ah lawn tool Lithium Ion battery

Post by redilast » Apr 17 2016 7:07am

markz wrote:What are the battery cans themselves. That seems to be the elusive info, because people go through the motions of opening it all up and are too wimpy and chicken $#^@ to actually see what the cans are. Its just "Look at me and my video" type of stuff. Grade school stuff really. Like the people making video's that repeat themselves, its annoying!
They look like Sanyo cells to me based on that picture. Maybe Sanyo 2Ah 20A rated cells?

The phase changing thing is kind of fishy... but it must do a little something, otherwise they wouldn't bother with the added expense of putting it on each cell. I'd be interested in doing some load tests on a cell with and without the phase change material and looking at the temperatures under my flir camera. Maybe I'll try to hunt down a pack. If anyone has any suggestions on a cheap broken pack let me know.

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spinningmagnets   100 GW

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Re: ego 56V 4Ah lawn tool Lithium Ion battery

Post by spinningmagnets » Jun 20 2016 3:41pm

I don't think I need 56V for a weed wacker, but...I like the idea that the weed wacker and the lawn mower can use the same battery. For the lawn mower, I am certain more volts is a good place to start.

Don't have the mower yet. However, bought the 56V string-trimmer, and just did my first lawn edging with it. Awesome! Very quiet. I had bought a corded string trimmer a few years ago, specifically so I could weed-wack early in the morning, when it is cooler. Its a pain to drag the long cord out, and then to coil it up and put it away, but...I did it until the wacker died last week. I always edge before I mow, so the mower bags most of the clippings, and disperses the rest.

I "could" wait until the gas mower dies, but...when winter comes, I'm selling it for $20, and buying the electric EGO 56V next spring.

edit: the large mower pack will also run the weed wacker, but....the small weed wacker pack refuses to run the mower, even unloaded. There are three blades on the mower battery interface, so that third blade somehow knows...this is relevant because a couple years from now I will be adapting my old ebike pack to run the mower.

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