Li Ion Battery Pack Mystery Part

[EugGreyBeard]

I have just acquired a 2009 e-bike with a dead Li Ion battery pack. I am preparing to rebuild the pack with new cells. I am curious to know if the little green chips on the old pack are part of the BMS system? What are they for?
If not a BMS part, perhaps ID tags? They have the number HW-65130 marked on them.

Thanks for any help!

 

[fechter]

They don't seem to have any components, so they must just be there to strengthen the tabs on the cells or make it easier to assemble.

 

[skeetab5780]

Ive seen this before on a rc lipo pack. That is all i have to say on this matter!

 

[Sunder]

They are just spacers to prevent a short circuit if the top of the pack is crushed or dropped.

Some other pack builders use cardboard or high density foam.

 

[flippy]

spacer boards. these usually means the factory also have the same version with a protection board. this is just to ease production and give something more "meat" to prevent breakage and make it clear to the little 6 year old soldering the pack to stop soldering and not connect the ends.