UPP Battery - Rectangle 52v - Ok to use?

[ElectroWoodGuy]

I bought my 52v 24ah over a year ago and finally getting to my build. Learned yesterday about UPP Battery and the triangle battery fires. My battery is a blue wrapped rectangle.

The info has me a little nervous. I’ve read only good things about the square UPP batteries, many with 3000km on them.

Any thoughts?

I can’t even find another brand that makes a 52v 22-30ah battery that’s max 70mm thick that’s either rectangle or will fit I my location.

 

[ElectroWoodGuy]

I bought my 52v 24ah over a year ago and finally getting to my build, a Bullitt cargo bike. Learned yesterday about UPP Battery and the triangle battery fires. My battery is a blue wrapped rectangle. D034

The info has me a little nervous. I’ve read only good things about the square UPP batteries, many with 3000km on them.

Any thoughts?

Haven’t found another 52v 22-30ah battery that would fit in the box in the photo. About 14x10x2.75”.

I’m open to other brands for peace of mind.

 

[eMark]

First off is it really 24Ah capacity? You know they use no name Chinese cells that are supposedly A-grade, but no proof of cell capacity or even how many cells are actually in parallel group.

As far as any/all blue wrapped flat batteries they are Chinese with no proof of Ah capacity and no name Chinese cells with
Protection BMS, but no proof of a balancing feature (not that you really need) with A-grade cells and TLC of battery.

CAUTION: You should get your money's worth of use IF you don't abuse it (e.g. pulling max amps for only seconds instead of minutes).

Charge to 80% and then just before using, top off to 100% just before riding on an extended trip. Do occasionally charge to 100% depending on use, to allow your cells to be properly balanced IF that UPP BMS even has a balancing function or just protection functions. Don't discharge below 30% (47.0v 14s (3.3v/cell)

Minimum Voltage for 52 volt battery before recharge

Minimum Voltage for 52 volt battery before recharge

goldenmotor.com

 

[Diggs]

If you bought the cheapest UPP pack where they don't say what cells are in it then there is cause for concern. They do make good packs with reputable cells (LG, Panasonic, etc.) that have a good history. Which is yours?

As mentioned before, I'm surprised at how few people even know what the actual capacity of their packs are.

battery pack ?what is in it

well some are better then others but I like not to combust even if doing something stupid who sells better cells in packs or is creation the best way I need high draw 60v for a scooter no petals

endless-sphere.com

 

[ElectroWoodGuy]

I have 52v 24ah battery that’s new but hasn’t been installed/used in easily 15-20 months. Just got done changing connectors to xt60. Plug charger in wall and test volts, 56.7. Tested battery and it’s 51.6v.

Connected battery to charger and the led#2 light did not come on indicating charging. #1 led light that indicates power is on.

Could this be because the battery is full? Should I use the battery and then try charging?

Sitting for over a year I read now wasn’t ideal not charging it. However, multi meter listing its near capacity.

 

[E-HP]

Proceed with some caution. If the battery has a BMS, they often continuously draw a small amount of current from the battery. Unfortunately, that current may only be drawn from one parallel group, instead of from the entire pack. If stored for a long period of time without occasionally charging the BMS can deplete the charge from that one group. When you plug in the charger, the BMS prevents charging if it senses a group that is dangerously low (below the LVC the BMS is set to).
You would need to open the pack and use a voltmeter to check the voltage of each group to get the status. If one group is below the LVC, but not severely e.g. 0v), you may be able to charge that one group to get it above the LVC, so you can use your charger to charge the pack. You’d want to do both of those things outside for safety.
If you need to know how to check the voltages, there are a few threads discussing that. Basically it involves disconnecting the BMS harness and checking and writing down, the voltages between the pins.

 

[ElectroWoodGuy]

Thanks for the reply. I’m leaning toward sourcing a new 52v 22ah or greater battery. This is an UPP battery, rectangle blue pack. I don’t really have the time now with work (school year starting) now and two little kids. I was hoping to ride it for a bit and see if draining it and then charging might help. Then again, $800 gets a nice looking 52v 24ah form Em3 plus there charger. The piece of mind and not burning my garage is a nice thought.

 

[theFalcon]

I bought my 52v 24ah over a year ago and finally getting to my build. Learned yesterday about UPP Battery and the triangle battery fires. My battery is a blue wrapped rectangle.

The info has me a little nervous. I’ve read only good things about the square UPP batteries, many with 3000km on them.

Any thoughts?

View attachment 357900 I can’t even find another brand that makes a 52v 22-30ah battery that’s max 70mm thick that’s either rectangle or will fit I my location.

I have five different UPP 52 v rectangle batteries just like the one in your picture that are going on their fourth year. I also had a upp 52v triangle battery on a bike that built and sold. I maintain five different e-bikes for the family and have had no issues with UPP or BTE.
I recently put together a test rabbit 60AH setup (as a long range experimental unit) you'll notice the blue 52v on the bottom of the stack, (on semi-dense foam).
It is not supporting the entire as the top batteries are on a tiny bracket supported by top tube.
Bottom line I have no concerns about the quality and toughness and longevity of UPP

 

[Chalo]

I recently put together a test rabbit 60AH setup (as a long range experimental unit)

Wow, can you even pedal that? My knees would strongly disagree with that wide a block of nonsense where they need to be.

 

[E-HP]

If you bought the cheapest UPP pack where they don't say what cells are in it then there is cause for concern. They do make good packs with reputable cells (LG, Panasonic, etc.) that have a good history. Which is yours?

As mentioned before, I'm surprised at how few people even know what the actual capacity of their packs are.

battery pack ?what is in it

well some are better then others but I like not to combust even if doing something stupid who sells better cells in packs or is creation the best way I need high draw 60v for a scooter no petals

endless-sphere.com

I have a generic 52V 20Ah triangle pack from my first build that I used a few years without issue. Sags a lot, but no other issues. I replaced it with a 52V 28Ah pack using Samsung 35E cells. The 35E's tend to sag anyway, so I have the pack paralleled with 14S of lipos, so I get almost no voltage sag out of the pack, and I haven't seen any capacity degradation since I've used it.
As mentioned, they make packs of different levels of quality, and you can't tell by just looking casually at their listings. But they do highlight the ones that actually have better construction, and some of those listing are funny. They show the "theirs" vs. "ours", but essentially "theirs" is like their cheaper quality packs (no cell holders, etc.). Some will state the specs of the BMS and what functions it performs (balancing, etc.). Basically, if they don't describe it, then you don't get it.
Pack with poor construction:

【USA STOCK 】R049-4 48V 19.2Ah BMS40A 21700 LG 4800mAh cells lithium ion battery pack fit for 0-1400w motor with 3A charger

R049-4 48V 19.2Ah BMS40A 21700 LG 4800mAh cells lithium ion battery pack fit for 0-1400w motor with 3A charger/USA STOCK/Fast delivery/3-5 working day

unitpackpower.net

Pack with better construction and cells:

【USA STOCK 】S039-3 Hailong-3 battery 48V 20Ah BMS40A LG4800mAh cells li-ion cells for 0-1400W Bafang BBSHD motor with 2A charger

Hailong-3 battery 48V 19.2Ah BMS40A LG4800mAh cells li-ion cells for 0-1400W Bafang BBSHD motor with 2A charger/USA STOCK/Fast delivery/3-5 working da

unitpackpower.net

 

[wye]

I bought my 52v 24ah over a year ago and finally getting to my build. Learned yesterday about UPP Battery and the triangle battery fires. My battery is a blue wrapped rectangle.

The info has me a little nervous. I’ve read only good things about the square UPP batteries, many with 3000km on them.

Any thoughts?

View attachment 357900 I can’t even find another brand that makes a 52v 22-30ah battery that’s max 70mm thick that’s either rectangle or will fit I my location.

 

[wye]

52V UPP battery purchased in 2022 … totaled my house .

 

[E-HP]

52V UPP battery purchased in 2022 … totaled my house .

I never charge unattended (I charge for ~1 hour or so at 8A, which is about what I use for a 30 mile ride). I worry more about my lipos.