Need help identifying this battery pack

[David.m]

Can you guys help me identify this battery pack
I measured the terminals, it shows 20v
There is some Chinese writing on the tag?

 

[BiggKidd]

Looks like LifePO4 105AH cells but need measurements to be sure 105's are about 1.25x5x8 inches. Also need to know how many cells there are total and how it's wired. Is it all series or series and parallel. If it's both series and parallel need to see / know how to say what the voltage should be.

 

[David.m]

Thank you sir,
Measurements are 5 wide 7 3/4 tall
There are 8 cells
The top is welded to battery so not possible to read what's on the top

But i was able to translate the Chinese
1P8S module positive production Temperature and pressure wiring harness

 

[BiggKidd]

Sounds like they are probably 105s and seeing as you have 8 total at a nominal voltage of 3.2 volts per cell. Your 20 volt reading means real dead 24 volt system. Actual voltage at maximum charge is 29.2 . Personally I would only take them to about 3.5 volts each or a total voltage of 28 volts but that's me.... YMMV

Generally these are real good long lasting cells!

If you want to use this as a supplemental battery for an E-bike you'll need a voltage converter. You most likely will not be able to use it as a stand alone battery for a higher voltage battery but with a good voltage converter you may be able to add it's power to the main battery.

 

[David.m]

So You think I can use this to build an ebike? That's awesome news!!!
Can you give me some details on what type of hub motor you think will be a good fit?
And what is the charger/ balancer to use?
I really appreciate your help!!!!

 

[BiggKidd]

So You think I can use this to build an ebike? That's awesome news!!!
Can you give me some details on what type of hub motor you think will be a good fit?
And what is the charger/ balancer to use?
I really appreciate your help!!!!

Not exactly. I think this could help stretch a proper battery's ride life. I don't think it will make a good stand alone battery UNLESS you stay to a 24 volt system which will certainly work but be slow....

Another option is to hunt used bikes until you find an old 24 volt bike and retrofit this for the battery. Back when E-bikes were new tech quite a few were 24 volts.

Before you do anything else you should checkout that battery by charging it up and using it to make sure the cells, BMS and all work as they should first.

 

[David.m]

Like this?

https://www.ebay.com/itm/375951216747

 

[BiggKidd]

Like this?

https://www.ebay.com/itm/375951216747

Something like that should work BUT you will need a controller and display and are usually much better off buying everything as a kit so you KNOW it works together!